TY - JOUR T1 - Monitoring aquifer depletion from space; case studies from the Saharan and Arabian Aquifers AN - 1696876064; 2015-068339 AB - Access to potable fresh water resources is a human right and a basic requirement for economic development in any society. In arid and semi-arid areas, the characterization and understanding of the geologic and hydrologic settings of, and the controlling factors affecting, these resources is gaining increasing importance due to the challenges posed by increasing population. In these areas, there is immense natural fossil fresh water resources stored in large extensive aquifers, the transboundary aquifers. Yet, natural phenomena (e.g., rainfall patterns and climate change) together with human-related factors (e.g., population growth, unsustainable over-exploitation, and pollution) are threatening the sustainability of these resources. In this study, we are developing and applying an integrated cost-effective approach to investigate the nature (i.e., natural and anthropogenic) and the controlling factors affecting the hydrologic settings of the Saharan (i.e., Nubian Sandstone Aquifer System [NSAS], Northwest Sahara Aquifer System [NWSA]) and Arabian (i.e., Arabian Peninsula Aquifer System [APAS]) aquifer systems. Analysis of the Gravity Recovery and Climate Experiment (GRACE)-derived Terrestrial Water Storage (TWS) inter-annual trends over the NSAS and the APAS revealed two areas of significant TWS depletions; the first correlated with the Dakhla Aquifer System (DAS) in the NSAS and second with the Saq Aquifer System (SAS) in the APAS. Annual depletion rates were estimated at 1.3 + or - 0.66 X 10 (super 9) m (super 3) /yr and 6.95 + or - 0.68 X 10 (super 9) m (super 3) /yr for DAS and SAS, respectively. Findings include (1) excessive groundwater extraction, not climatic changes, is responsible for the observed TWS depletions; (2) the DAS could be consumed in 350 years if extraction rates continue to double every 50 years and the APAS available reserves could be consumed within 60-140 years at present extraction (7.08 X 10 (super 9) m (super 3) /yr) and depletion rates; and (3) observed depletions over DAS and SAS and their absence across the remaining segments of the NSAS and the APAS suggest the aquifers are at near-steady conditions except for the DAS and SAS that are witnessing unsteady transient conditions. Implications for applying the methodologies advocated for assessment and optimum management of a large suite of fossil aquifers worldwide are clear. JF - American Geophysical Union Fall Meeting AU - Ahmed, M AU - Sultan, M AU - Wahr, J M AU - Yan, E AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H51E EP - 1241 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696876064?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Monitoring+aquifer+depletion+from+space%3B+case+studies+from+the+Saharan+and+Arabian+Aquifers&rft.au=Ahmed%2C+M%3BSultan%2C+M%3BWahr%2C+J+M%3BYan%2C+E%3BAnonymous&rft.aulast=Ahmed&rft.aufirst=M&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-17 N1 - CODEN - #07548 ER - TY - JOUR T1 - Controls on iron isotopic fractionation in igneous rocks AN - 1692746408; 2015-063010 AB - Earth shows a unique geochemical stratification for iron comprising a core made of metallic iron, a mantle rich in ferrous/ferric iron and the crust where reservoirs rich in ferric iron are present. Understanding how this stratification was established is at the center of many interrogations in Earth sciences, such as why is there Fe3+ in Earth, was there a secular change in the redox state of the mantle, how does recycling affect redox conditions in the Earth? Iron isotopic variations have been detected in igneous rocks but interpretation of those results is uncertain because the database of equilibrium fractionation factors between phases is incomplete or even entirely missing for some phases. This can be addressed using a synchrotron by measuring the mean force constant of iron bonds, which is proportional to the third moment of the spectra measured by nuclear resonant inelastic x-ray scaterring. Those force constant measurements help us understand why oceanic crust has heavy iron isotopic composition relative to chondrites, they can explain the large isotopic fractionation measured in silicic melts, and they can help us test the idea that core formation fractionated iron isotopes. New NRIXS measurements of synthetic phases enriched in 57Fe that shed new light on these questions will be presented. JF - American Geophysical Union Fall Meeting AU - Dauphas, N AU - Roskosz, Mathieu AU - Lin, J AU - Liu, Jin AU - Neuville, D R AU - Alp, E E AU - Hu, M Y AU - Zhao, J AU - McCammon, Catherine A AU - Okuchi, T AU - Tomioka, N AU - Sio, C AU - Tissot, F AU - Tissandier, L AU - Medard, E AU - Cordier, Catherine AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR52A EP - 03 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692746408?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Controls+on+iron+isotopic+fractionation+in+igneous+rocks&rft.au=Dauphas%2C+N%3BRoskosz%2C+Mathieu%3BLin%2C+J%3BLiu%2C+Jin%3BNeuville%2C+D+R%3BAlp%2C+E+E%3BHu%2C+M+Y%3BZhao%2C+J%3BMcCammon%2C+Catherine+A%3BOkuchi%2C+T%3BTomioka%2C+N%3BSio%2C+C%3BTissot%2C+F%3BTissandier%2C+L%3BMedard%2C+E%3BCordier%2C+Catherine%3BAnonymous&rft.aulast=Dauphas&rft.aufirst=N&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Melt detection of Fe-Ni at high-pressures using atomic dynamics measurements and a fast temperature readout spectrometer AN - 1692745971; 2015-062998 AB - Cosmochemical studies suggest that the cores of terrestrial planetary bodies are primarily composed of Fe with approximately 5-10 wt% Ni (e.g., McDonough and Sun 1995). The P-T conditions of the cores of Mars, Mercury, Earth's moon, Io and Ganymede are thought to lie in the stability field of fcc-structured Fe alloyed with approximately 10 wt% Ni (e.g., Fei et al. 2005). Geomagnetic surveys suggest these terrestrial bodies either have or once had a magnetic dynamo (e.g., Margot et al. 2007), which likely requires the presence of a liquid metallic core surrounding a solid inner core. Therefore, an accurate determination of the melting temperature of fcc-structured Fe-Ni at high pressure will provide constraints on the thermal structure of these small terrestrial bodies, and in turn, may provide insight to their magnetic dynamo and interior evolution history. We have developed a new metric for detecting the solid-liquid phase boundary of Fe-bearing materials at high-pressures using synchrotron Mossbauer spectroscopy (SMS). Focused synchrotron radiation with 1 meV bandwidth passes through a laser-heated Fe-bearing sample inside a diamond-anvil cell. The characteristic SMS time signal vanishes when melting occurs. This process is described by the Lamb-Mossbauer factor, a quantity that is directly related to the mean-square displacement of the Fe atoms. Therefore, we measure the atomic dynamics in the material, in contrast to a static diffraction measurement. The SMS technique provides a new and independent means of melting point determination for materials under high-pressure, as well as access to vibrational properties of the solid near its melting point (Jackson et al. 2013). Accurate melting temperatures of the sample are also necessary factors in constructing reliable melting curves. However, most conventional temperature measurement methods in laser-heated diamond-anvil cell studies are often too slow ( approximately 0.3 Hz) to capture the sample's transient temperature fluctuations, which can be significant for materials near their melting points. To accurately capture this effect and reduce uncertainties in melting temperatures, we have developed a Fast Temperature Readout (FasTeR) spectrometer in-line with nuclear resonance scattering measurements under extreme conditions at Sector 3-ID-B of the Advanced Photon Source. Dedicated to determining the sample's temperature near its melting point, FasTeR features a fast readout rate ( approximately 100 Hz), high sensitivity, large dynamic range and well-constrained focus. FasTeR may also be ideal for a variety of short time-scale measurements conducted at high-temperatures. FasTeR has been successfully combined with SMS measurements on compressed fcc-structured Fe alloyed with 10 wt% Ni to determine the melting curve by monitoring the dynamics of the atoms. JF - American Geophysical Union Fall Meeting AU - Zhang, D AU - Jackson, J M AU - Zhao, J AU - Sturhahn, Wolfgang AU - Alp, E E AU - Hu, M Y AU - Toellner, T S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR44A EP - 07 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692745971?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Melt+detection+of+Fe-Ni+at+high-pressures+using+atomic+dynamics+measurements+and+a+fast+temperature+readout+spectrometer&rft.au=Zhang%2C+D%3BJackson%2C+J+M%3BZhao%2C+J%3BSturhahn%2C+Wolfgang%3BAlp%2C+E+E%3BHu%2C+M+Y%3BToellner%2C+T+S%3BAnonymous&rft.aulast=Zhang&rft.aufirst=D&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Two-phase deformation of lower mantle mineral analogs AN - 1692744378; 2015-059353 AB - While much is known about preferred orientation in single phase rocks, deformation of polyphase rocks is largely unexplored. Nearly all of the Earth is composed of polymineral aggregates, including the lower mantle, which is of critical importance for understanding the geodynamic evolution of the planet. Geodynamic models predict large strains due to convection in the mantle, and polycrystal plasticity simulations suggest strong crystallographic preferred orientation (CPO). However, these models ignore interaction among phases, which is important for the lower mantle, estimated to be composed of approximately 25% soft magnesiowustite (Mg,Fe)O and approximately 70% harder Mg-perovskite (MgSiO (sub 3) ). Grains of the soft phase may become interconnected and act as a lubricant between grains of the harder phase, or the soft phase may not be interconnected, causing deformation to be absorbed by the harder phase. To study the effect of a second phase on CPO, we performed deformation experiments in the deformation-DIA (D-DIA) at the Advanced Photon Source (APS) while collecting X-ray diffraction patterns in situ. Since D-DIA cannot reach pressures of the lower mantle, we chose analog minerals halite (NaCl) and neighborite (NaMgF (sub 3) ) with the same structures and relative strengths as the original mantle minerals. Information on grain structure and distribution before and after deformation was collected using X-ray microtomography, both at the APS and the Advanced Light Source (ALS). Results from D-DIA experiments show that when present in as little as 25%, the soft phase absorbs much of the deformation, greatly reducing CPO of the harder phase. Conversely, CPO in NaCl is highest for the sample with highest NaCl content. This suggests that crystallographic orientation develops and evolves best in rocks largely composed of one mineral phase, and the addition of a second phase greatly hinders CPO, even at high strain. In addition, microtomography data shows that soft NaCl surrounds the harder grains of NaMgF (sub 3) . These findings are very encouraging, and we continue our study of two-phase deformation texture and microstructure with fast Fourier transform (FFT) modeling which takes into account interactions among grains. JF - American Geophysical Union Fall Meeting AU - Kaercher, P M AU - Zepeda-Alarcon, E AU - Lebensohn, R AU - Miyagi, Lowell M AU - Kanitpanyacharoen, J AU - Wang, Y AU - Parkinson, D AU - DeCarlo, F AU - Wenk, H AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR41A EP - 2344 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692744378?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Two-phase+deformation+of+lower+mantle+mineral+analogs&rft.au=Kaercher%2C+P+M%3BZepeda-Alarcon%2C+E%3BLebensohn%2C+R%3BMiyagi%2C+Lowell+M%3BKanitpanyacharoen%2C+J%3BWang%2C+Y%3BParkinson%2C+D%3BDeCarlo%2C+F%3BWenk%2C+H%3BAnonymous&rft.aulast=Kaercher&rft.aufirst=P&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Noble gas radionuclide (Kr-85, Ar-39, Kr-81) concentrations in deep fracture waters of the Withwatersrand Basin South Africa AN - 1692743329; 2015-059009 AB - (super 81) Kr has been proposed since many years an ideal tracer for dating subsurface fluids on timescales up to 2 million years. However, only recently the method became practicable for real case investigations due to significant analytical improvements [1]. In this study radioactive noble gas isotopes ( (super 81) Kr, (super 85) Kr and (super 39) Ar) were applied for the characterisation of fracture waters in the deep gold mines of the Witwatersrand Basin, South Africa [2]. Those waters catalyzed interest because of deep microbial communities that persists to depths of over 3 km [3]. The key objective of the present study is to further constrain the origin of the fluids, to determine the timing of deep subsurface life and to test the (super 81) Kr method in all kinds of environments. In contrast to expectations [4] we discovered that underground production of (super 81) Kr is a significant process in the rocks of the Withwatersrand and Ventersdorp Supergroups. All measured (super 81) Kr activities from fracture water were significantly higher than in atmospheric equilibrium. This is most likely related to elevated U/Th concentrations in the rock strata. Radiometric decay dating is complicated in such cases. [1]. W. Jiang et al., Geochim. Cosmochim. Acta 91, 1 (2012). [2].T. C. Onstott et al., Geomicrobiology J. 26, 269 (2009). [3].G. Borgonie et al., Nature 474, 79. [4]. B. Lehmann et al, WRR. 29, 2027 (1993). JF - American Geophysical Union Fall Meeting AU - Purtschert, R AU - Onstott, T C AU - Jiang, W AU - Lu, Z AU - Mueller, P AU - van Heerden, E AU - Erasmus, M AU - Borgonie, G AU - Linage, B AU - Kuloyo, O AU - Kipfer, R AU - Brennwald, Matthias S AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H13I EP - 1492 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692743329?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Noble+gas+radionuclide+%28Kr-85%2C+Ar-39%2C+Kr-81%29+concentrations+in+deep+fracture+waters+of+the+Withwatersrand+Basin+South+Africa&rft.au=Purtschert%2C+R%3BOnstott%2C+T+C%3BJiang%2C+W%3BLu%2C+Z%3BMueller%2C+P%3Bvan+Heerden%2C+E%3BErasmus%2C+M%3BBorgonie%2C+G%3BLinage%2C+B%3BKuloyo%2C+O%3BKipfer%2C+R%3BBrennwald%2C+Matthias+S%3BAnonymous&rft.aulast=Purtschert&rft.aufirst=R&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Discrepancy among the Au, Pt, and MgO pressure scales at 20-30 GPa and 1700-2100 K in the laser-heated diamond-anvil cell AN - 1692743307; 2015-059233 AB - A multi-anvil press study by Irifune et al. (1998) reported that the post-spinel transition occurs at 21.3 GPa and 1850 K using Anderson et al. (1989) Au scale in Mg (sub 2) SiO (sub 4) , while a later laser-heated diamond-anvil cell (LHDAC) study (Shim et al., 2001) reported 23.8 GPa using Holmes et al. (1989) Pt scale at the same temperature. The 2.6-GPa difference has been attributed to the accuracy of the pressure scales. However, high-temperature equations of state (EOS) of Au and Pt have been compared only at a limited pressure-temperature range in multi-anvil press (Fei et al., 2004). We have compared the thermal EOS of Au, Pt, and MgO at 20-30 GPa and 1700-2100 K in LHDAC combined with synchrotron X-ray diffraction at the GSECARS and HPCAT sectors of APS through two different approaches: (1) determination of the post-spinel boundary in a MgO-Al (sub 2) O (sub 3) -SiO (sub 2) pyrolitic composition using the Au and Pt scales, and (2) unit-cell volume measurements on separate MgO+Au and MgO+Pt mixtures. In order to prevent alloying between Pt and Au, we did not mix them, but prepared separate samples and loaded in separate DACs. All the samples were loaded with an argon medium. Diffraction pattern analysis shows that deviatoric stress should be less than 1 GPa at high temperature. Spectroradiometry data show that temperature gradients should be less than 100 K. We found that the post-spinel boundary occurs at 23.4+ or -0.2 GPa (at 1850 K) if Holmes et al. (1989) Pt scale is used, while at 24.3+ or -0.2 GPa for Fei et al. (2007) Pt scale. In separate measurements, the transition occurs at 25.8+ or -0.2 GPa for Anderson et al. (1989) Au scale and 27.6+ or -0.2 GPa for Fei et al. (2007) Au scale, indicating 3.3+ or -0.3 GPa discrepancy between Fei et al. (2007) Pt and Au scales, thermal parts of which are mainly constrained by intercalibration data at 21-24 GPa and 1400-2200 K in multi-anvil press (Fei et al., 2004). Our data on MgO+Pt mixtures show that pressures from Fei et al. (2007) Pt scale is 1.9+ or -0.6 GPa lower than those of Speziale et al. (2000) MgO scale at 20-30 GPa and 1700-2100 K. Our MgO+Au mixture data indicate that Fei et al. (2007) Au scale is 0.9+ or -0.3 GPa higher than the MgO scale in the pressure-temperature range, suggesting a pressure difference of 2.8+ or -0.6 GPa between Fei et al. (2007) Pt and Au scales at the pressure-temperature conditions expected for the post-spinel transition, consistent with what we found for the post-spinel phase boundary determination. Anderson et al. (1989) Au scale yields a post-spinel phase transition pressure of 21.3 GPa for multi-anvil data (Irifune et al. 1998) and 25.8+ or -0.2 GPa for our LHDAC data. While the comparison should be made with caution because of kinetic effects and compositional differences, the discrepancy may indicate that much of the 3-GPa difference identified from our two different sets of experiments may result from technical differences between multi-anvil press and LHDAC, including pressure effects on thermocouple calibration and emissivity of the laser couplers, as well as inaccuracy of existing pressure scales. The 3-GPa discrepancy correspond to a depth uncertainty of 85 km near 660 km depth, placing severe limitations in our ability to apply laboratory results to the interpretation of seismic studies. JF - American Geophysical Union Fall Meeting AU - Shim, S H D AU - Ye, Y AU - Meng, Y AU - Prakapenka, V AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR31A EP - 2262 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692743307?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Discrepancy+among+the+Au%2C+Pt%2C+and+MgO+pressure+scales+at+20-30+GPa+and+1700-2100+K+in+the+laser-heated+diamond-anvil+cell&rft.au=Shim%2C+S+H+D%3BYe%2C+Y%3BMeng%2C+Y%3BPrakapenka%2C+V%3BAnonymous&rft.aulast=Shim&rft.aufirst=S+H&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Using (super 81) Kr-age of groundwater in the Guarani Aquifer, Brazil, to constrain estimates of continental degassing flux of (super 4) He AN - 1692743111; 2015-059006 AB - Continental degassing flux of helium is the dominant component of dissolved helium in deep groundwater together with that produced in-situ in the aquifer. A reliable estimate of the degassing flux is critical to the use of (super 4) He as a dating tool in groundwater studies. The degassing flux is also important for understanding fluid and heat transport in the mantle and the rust. An independent tracer of groundwater age is required in order to deconvolute the two signals of the external, degassing flux and in situ production. Estimates of degassing flux mostly have relied upon shorter-lived radionuclides such as (super 14) C and tritium and the resulting flux estimates have a significant variability (Torgersen, 2010). In the Guarani Aquifer in Brazil, an effective crustal (super 4) He degassing flux into the aquifer was estimated from (super 81) Kr ages ranging from about 70 Ka to 570 Ka. We then used the model framework of Toregesen and Ivey (1985), modified to include a diffusive reduction of originally uniform crustal helium flux from basement rocks through a thick sedimentary layer beneath the aquifer, to calculate a distribution of radiogenic (super 4) He within the aquifer. With this framework, we obtain (super 4) He ages that are consistent with ages based on (super 81) Kr and (super 14) C, and with a crustal degassing flux equivalent to that estimated from U and Th contents in the crust. The model framework for the Guarani Aquifer is also applied to data from other deep aquifers in Africa and Australia and our results suggest that the continental flux of (super 4) He may be uniform, at least in stable continental areas. Additionally, a reliable estimate of the (super 4) He degassing flux also helps to constrain the surficial discharge of deep groundwater. JF - American Geophysical Union Fall Meeting AU - Aggarwal, P K AU - Matsumoto, T AU - Sturchio, N C AU - Chang, H K AU - Gastmans, D AU - Lu, Z AU - Jiang, W AU - Mueller, P AU - Yokochi, R AU - Han, L AU - Klaus, P AU - Torgersen, T AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H13I EP - 1489 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692743111?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Using+%28super+81%29+Kr-age+of+groundwater+in+the+Guarani+Aquifer%2C+Brazil%2C+to+constrain+estimates+of+continental+degassing+flux+of+%28super+4%29+He&rft.au=Aggarwal%2C+P+K%3BMatsumoto%2C+T%3BSturchio%2C+N+C%3BChang%2C+H+K%3BGastmans%2C+D%3BLu%2C+Z%3BJiang%2C+W%3BMueller%2C+P%3BYokochi%2C+R%3BHan%2C+L%3BKlaus%2C+P%3BTorgersen%2C+T%3BAnonymous&rft.aulast=Aggarwal&rft.aufirst=P&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Discovery of ahrensite gamma -Fe (sub 2) SiO (sub 4) and tissintite Ca, Na,AlSi (sub 2) O (sub 6) , two new shock-induced minerals from the Tissint Martian meteorite; nanomineralogy investigation AN - 1692743063; 2015-059251 AB - The recent Martian meteorite fall, Tissint, is a fresh olivine-phyric shergottite, with strong shock features. During our nano-mineralogy investigation of the Tissint meteorite with a combined analytical scanning electron microscope and synchrotron diffraction approach, two new shock-induced minerals have been discovered; these provide new insights into understanding shock conditions and impact processes on Mars. Ahrensite (IMA 2013-028), the Fe-analogue (gamma -Fe (sub 2) SiO (sub 4) ) of ringwoodite, is a new high-pressure mineral identified in Tissint. Both ahrensite and ringwoodite occur in Tissint as fine-grained polycrystalline aggregates in the rims of olivines around some shock-melt pockets. The morphology and texture of these silicate-spinels suggest formation by a solid-state transformation from Fe-rich olivine. Associated with the ahrensite and ringwoodite, inside melt pockets, often resides a thin layer of vitrified silicate-perovskite and magnesio-wustite or wustite. Such transitions represent a unique pressure and temperature gradient. Tissintite (IMA 2013-027), (Ca,Na,)AlSi (sub 2) O (sub 6) with the C2/c clinopyroxene structure, is a new jadeite-like mineral in Tissint. It appears as fine-grained aggregates within plagioclase glass, inside many shock-melt pockets. Both ahrensite and tissintite are high-pressure minerals formed by shock during the impact event(s) on Mars that excavated and ejected the rock off Mars. We will discuss the path of structure analysis for both new-mineral cases. Such novel methodology be utilized for many cases of mineralogical phase identification or structure analysis; this demonstrates how nano-mineralogy can be addressed and how it may play a unique role in meteorite and Mars rock research, in general. JF - American Geophysical Union Fall Meeting AU - Ma, Chi AU - Tschauner, Oliver D AU - Liu, Yang AU - Sinogeikin, S V AU - Zhuravlev, K K AU - Prakapenka, V AU - Dera, P K AU - Taylor, L A AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR31A EP - 2280 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692743063?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Discovery+of+ahrensite+gamma+-Fe+%28sub+2%29+SiO+%28sub+4%29+and+tissintite+Ca%2C+Na%2CAlSi+%28sub+2%29+O+%28sub+6%29+%2C+two+new+shock-induced+minerals+from+the+Tissint+Martian+meteorite%3B+nanomineralogy+investigation&rft.au=Ma%2C+Chi%3BTschauner%2C+Oliver+D%3BLiu%2C+Yang%3BSinogeikin%2C+S+V%3BZhuravlev%2C+K+K%3BPrakapenka%2C+V%3BDera%2C+P+K%3BTaylor%2C+L+A%3BAnonymous&rft.aulast=Ma&rft.aufirst=Chi&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Evolution of mineral fabrics and microstructures in Kimmeridge Shale upon kerogen maturation AN - 1692742822; 2015-059215 AB - Shale has increasingly received attention due to its recent recognition as a potential game changer of US energy outlook. However a fundamental relationship between mineral lattice preferred orientation (LPO or fabrics), kerogen, and elastic properties of shale remains questionable. Here we present different synchrotron X-ray techniques to capture microstructural transformations in Kimmeridge Shale upon temperature-induced anhydrous maturation. At room condition, the sample is mainly composed of clays 72 vol.%, quartz (15 vol.%), pyrite (11 vol.%), and a small amount of pyrite (2 vol.%). Illite-group is the dominating clay with 50 vol.% present. Illite-mica (30 vol.%) shows the highest degree of LPO (3.33 m.r.d.), which is consistent with previous studies (Wenk et al 2008, Voltolini et al. 2009, Kanitpanyacharoen et al. 2011). However the illite-smectite group exhibits relatively weaker degree of LPO due to the disordered nature of the structure. Chlorite shows the least degree of LPO due to its total clay content, which is only 2 vol.%. Upon heating to 300 degrees C, the phase proportions did not change much and the degrees of all clay minerals fabrics remain fairly consistent. The high-resolution 3D imaging technique allows us to record different stages of kerogen transformation, particularly a significant gas bubble formation at 400 degrees C. Upon heating up to 500 degrees C, kerogen shrinkage (17 vol.%) and clay matrix expansion continued and appeared more pronounced after 10 hours of heating. The consistent results from both experiments confirm that no significant change of mineral fabrics and microstructural features below 300 degrees C observed. These findings further infer that the evolution of clay fabrics and kerogen maturation may affect elastic anisotropy consistently at the temperature below 300 degrees C. The reduction of kerogen greatly influences elastic anisotropy properties and the identification of the promising source in the hydrocarbon reservoir. JF - American Geophysical Union Fall Meeting AU - Kanitpanyacharoen, J AU - Vanorio, T AU - Liu, Yiji AU - Xiao, X AU - Benmore, C AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR24A EP - 07 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692742822?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Evolution+of+mineral+fabrics+and+microstructures+in+Kimmeridge+Shale+upon+kerogen+maturation&rft.au=Kanitpanyacharoen%2C+J%3BVanorio%2C+T%3BLiu%2C+Yiji%3BXiao%2C+X%3BBenmore%2C+C%3BAnonymous&rft.aulast=Kanitpanyacharoen&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Radiometric (super 81) Kr dating identifies 120,000 year old ice at Taylor Glacier, Antarctica AN - 1692740927; 2015-059011 AB - Ice cores from the Greenland and Antarctic ice sheets provide highly resolved, well-dated climate records of past polar temperatures, atmospheric composition and aerosol loading up to 800 ka before present. In addition to deep ice cores, old ice can also be found at ice margin sites and blue ice areas (BIAs) where it is exposed due to local ice dynamics and ablation. BIAs have great potential for paleoclimate studies, as large quantities of old ice are available at the surface where it can be sampled with relative ease. Determining the age of the ablating ice is the main difficulty in using BIAs for climate reconstructions. There is significant scientific interest in obtaining glacial ice dating beyond 800 ka, as such an archive would extend the ice core record further back in time; such old ice can potentially be found in Antarctic BIAs such as the Allan Hills site, providing a strong impetus to developing reliable (absolute) dating tools for glacial ice. (super 81) Kr is naturally produced in the upper atmosphere by cosmic ray interactions with the stable isotopes of Kr. The long half-life (229 ka) of (super 81) Kr allows for radiometric dating in the 50 ka - 1.5 Ma age range, well past the reach of radiocarbon dating. Recent technological advances in Atom Trace Trap Analysis (ATTA) have reduced sample requirements to 40-80 kg of ice, which can realistically be obtained from BIAs and ice margins. We present the first successful (super 81) Kr-Kr radiometric dating of ancient polar ice. Krypton was extracted from the air bubbles in four approximately 350 kg polar ice samples from Taylor Glacier in the McMurdo Dry Valleys, Antarctica, and dated using ATTA. The (super 81) Kr radiometric ages agree with independent age estimates obtained from stratigraphic dating techniques with a root mean square offset of 6.5 ka. Our experimental methods and sampling strategy are validated by 1) (super 85) Kr and (super 39) Ar analyses that show the samples to be free of modern air contamination, and 2) air content measurements that show the ice did not experience gas loss. We estimate the error in the (super 81) Kr ages due to past geomagnetic variability to be below 3 ka. We show that ice from the Eemian interglacial period (130-115 ka BP) can be found in abundance near the surface of Taylor Glacier. Our study paves the way for reliable radiometric dating of ancient ice in blue ice areas and margin sites, greatly enhancing their scientific value as archives of old ice and meteorites. As sample requirements continue to decrease, (super 81) Kr dating of ice cores is a future possibility. JF - American Geophysical Union Fall Meeting AU - Buizert, C AU - Baggenstos, D AU - Jiang, W AU - Purtschert, R AU - Petrenko, V V AU - Lu, Z AU - Mueller, P AU - Kuhl, Tanner AU - Lee, J AU - Severinghaus, J P AU - Brook, E AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H13I EP - 1494 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740927?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Radiometric+%28super+81%29+Kr+dating+identifies+120%2C000+year+old+ice+at+Taylor+Glacier%2C+Antarctica&rft.au=Buizert%2C+C%3BBaggenstos%2C+D%3BJiang%2C+W%3BPurtschert%2C+R%3BPetrenko%2C+V+V%3BLu%2C+Z%3BMueller%2C+P%3BKuhl%2C+Tanner%3BLee%2C+J%3BSeveringhaus%2C+J+P%3BBrook%2C+E%3BAnonymous&rft.aulast=Buizert&rft.aufirst=C&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Krypton-81 and groundwater flow in the culebra dolomite near the Waste Isolation Pilot Plant, New Mexico AN - 1692740820; 2015-059007 AB - The Waste Isolation Pilot Plant (WIPP) in New Mexico is the first geologic repository for disposal of transuranic nuclear waste from defense-related programs of the US Department of Energy. It is constructed within halite beds of the Permian-age Salado Formation. The Culebra Dolomite, confined within Rustler Formation evaporites, is a potential pathway for radionuclide transport from the repository to the accessible environment in the human-disturbed repository scenario. Although extensive subsurface characterization and numerical flow modeling of groundwater has been done in the vicinity of the WIPP, few studies have used natural isotopic tracers to validate the flow models at this site. We performed measurements of the cosmogenic isotopic tracer (super 81) Kr (half-life 229,000 yr) in two Culebra monitoring wells near the WIPP site, and compared (super 81) Kr model ages with the results of an ensemble of flow models. The (super 81) Kr model ages were approximately 130,000 and approximately 330,000 yr for high-transmissivity and low-transmissivity portions of the aquifer, respectively. These model ages are in broad agreement with flow model results, when taking into account diffusive exchange of Kr between the aquifer and the stagnant zones of the confining formations. JF - American Geophysical Union Fall Meeting AU - Sturchio, N C AU - Kuhlman, K L AU - Yokochi, R AU - Jiang, W AU - Lu, Z AU - Mueller, P AU - Yang, G AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H13I EP - 1490 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740820?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Krypton-81+and+groundwater+flow+in+the+culebra+dolomite+near+the+Waste+Isolation+Pilot+Plant%2C+New+Mexico&rft.au=Sturchio%2C+N+C%3BKuhlman%2C+K+L%3BYokochi%2C+R%3BJiang%2C+W%3BLu%2C+Z%3BMueller%2C+P%3BYang%2C+G%3BAnonymous&rft.aulast=Sturchio&rft.aufirst=N&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - ATTA-3; a state-of-the-art instrument for radio-krypton dating AN - 1692740808; 2015-058998 AB - The ATTA-3 instrument at Argonne has recently enabled routine Kr-81 dating. The instrument is based on Atom Trap Trace Analysis (ATTA), a novel laser based atom counting technique that allows detection of long lived noble gas radioisotopes (Kr-81, Kr-85 and Ar-39) with extremely low abundance (1E-16 to 1E-10). At the center of the instrument is a magneto-optical trap (MOT), which traps and counts only the atoms of the desired isotope. This unique feature makes ATTA free of interference from any other isotopes or molecular species. For Kr-81 dating in the age range of 150 - 1,500 kyr, the required sample size is 5 - 10 micro-L STP of krypton gas, which can be extracted from approximately 100 - 200 kg of water or 40 - 80 kg of ice. Several recent developments in our lab may lead to further improvements to the current ATTA-3 apparatus: 1) The isotopic abundance ratio between the unknown, rare isotope (either Kr-81 or Kr-85) and the stable, abundant isotope (Kr-83) is measured. Here the stable isotope serves as a control isotope. A new method has been developed that allows more accurate measurements of the control isotope Kr-83. Combined with the ability to measure the rare Kr-81 and Kr-85 isotopes, this scheme allows ATTA-3 to directly determine (super 81) Kr/Kr and (super 85) Kr/Kr ratios without other supplemental measurements, to reduce the overall uncertainties of the measured isotope ratios, and also to improve the long term stability of the system. 2) The current capacity of the ATTA-3 instrument is about 120 samples per year. The throughput is mainly limited by the so called "memory effect", which is caused by the residual samples trapped in the system after each measurement. These residual samples are gradually released in subsequent measurements, causing cross-sample contaminations. In order to mitigate this problem, we wash the system with a xenon discharge for about 36 hours between measurements. This practice limits the overall sample processing speed. Preliminary investigations of the memory effect indicate that it can be reduced and the wash time between measurements shortened. This will increase the number of samples that the ATTA-3 instrument can handle annually in the future. This work is supported by DOE, Office of Nuclear Physics, under contract DE-AC02-06CH11357. JF - American Geophysical Union Fall Meeting AU - Jiang, W AU - Zappala, J C AU - Bailey, K AU - Lu, Z AU - Mueller, P AU - O'Connor, T P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract H13I EP - 1481 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740808?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=ATTA-3%3B+a+state-of-the-art+instrument+for+radio-krypton+dating&rft.au=Jiang%2C+W%3BZappala%2C+J+C%3BBailey%2C+K%3BLu%2C+Z%3BMueller%2C+P%3BO%27Connor%2C+T+P%3BAnonymous&rft.aulast=Jiang&rft.aufirst=W&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Multi-scale 3D X-ray imaging capabilities at the Advanced Photon Source; current status and future direction AN - 1692740801; 2015-059216 AB - In x-ray computed mu -tomography (mu -XCT), a thin scintillator screen is coupled to a visible light lens and camera system to obtain micrometer-scale transmission imaging of specimens as large as a few millimeters. Recent advances in detector technology allow collecting these images at unprecedented frame rates. For a high x-ray flux density synchrotron facility like the Advanced Photon Source (APS), the detector exposure time ranges from hundreds of milliseconds to hundreds of picoseconds, making possible to acquire a full 3D micrometer-resolution dataset in less than one second. The micron resolution limitation of parallel x-ray beam projection systems can be overcame by Transmission X-ray Microscopes (TXM) where part of the image magnification is done in x-ray regime using x-ray optics like capillary condensers and Fresnel zone plates. These systems, when installed on a synchrotron x-ray source, can generate 2D images with up to 20 nm resolution with second exposure time and collect a full 3D nano-resolution dataset in few minutes. mu -XCT and TXM systems available at the x-ray imaging beamlines of the APS are routinely used in material science and geoscience applications where high-resolution and fast 3D imaging are instrumental in extracting in situ four-dimensional dynamic information. In this presentation we describe the computational challenges associated with mu -XCT and TXM systems and present the framework and infrastructure developed at the APS to allow for routine multi-scale data integration between the two systems. JF - American Geophysical Union Fall Meeting AU - DeCarlo, F AU - Xiao, X AU - Khan, F AU - Glowacki, A AU - Schwarz, N AU - Jacobsen, C AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR24A EP - 08 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740801?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Multi-scale+3D+X-ray+imaging+capabilities+at+the+Advanced+Photon+Source%3B+current+status+and+future+direction&rft.au=DeCarlo%2C+F%3BXiao%2C+X%3BKhan%2C+F%3BGlowacki%2C+A%3BSchwarz%2C+N%3BJacobsen%2C+C%3BAnonymous&rft.aulast=DeCarlo&rft.aufirst=F&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Polyamorphic phase transition of Yb-based metallic glass at high pressure AN - 1692740732; 2015-059226 AB - A family of Yb-based bulk metallic glasses (BMG) has been fabricated based on strong liquid characteristic and excellent glass-forming ability. Using a diamond anvil cell with high-energy synchrotron X-ray, the total scattering of metallic glass Yb-Mg-Zn was studied at pressure up to 30GPa in a hydrostatic isopropanol pressure-medium. The local structure was investigated through direct Fourier transformation of the structure factor [S(Q)], pair distribution function (PDF) [G(r)] with background correction. Polyamorphic phase transition is achieved because smaller atoms are extruded into the clearance of the larger rare earth atoms and 4f electrons delocalized. Phase transition from a low-density state to a high-density state occurs, smaller atoms can be extruded is one of two reasons for the high compressibility of rare earth BMG. The second reason is the delocalization of 4f electrons, which can induce the volume collapse of rare earth atoms. JF - American Geophysical Union Fall Meeting AU - Li, Liang AU - Li, R AU - Liu, Haozhe AU - Chupas, P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR31A EP - 2255 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740732?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Polyamorphic+phase+transition+of+Yb-based+metallic+glass+at+high+pressure&rft.au=Li%2C+Liang%3BLi%2C+R%3BLiu%2C+Haozhe%3BChupas%2C+P%3BAnonymous&rft.aulast=Li&rft.aufirst=Liang&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam.2013.4290 LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Study on liquid-liquid phase transitions of gallium at high pressure and temperature with X-ray microtomography AN - 1692740728; 2015-059227 AB - There are three crystalline structures for a solid state under ambient condition for gallium. Local structures in melts trend to show short range ordering within a few tenths of a nanometer, which are often considered to be correlated with the atomic arrangements of their solid counterparts. For non-crystalline samples, such as amorphous materials and melts, Due to their lack of periodicity, diffraction patterns from amorphous and liquid phases are very broad; therefore, it is challenging to obtain density information under high-pressure conditions. On the other hand, x-ray microtomography can provide density and geometry information on samples regardless of their crystallinity. Synchrotron x-ray microtomography enables us to carry out in situ density measurements on liquids at high pressures. Thus, we can address whether there are liquid-liquid phase transitions of gallium and better understand the physical processes of phase transitions. JF - American Geophysical Union Fall Meeting AU - Li, Renfeng AU - Li, Liang AU - Rivers, M L AU - Liu, Haozhe AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR31A EP - 2256 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1692740728?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Study+on+liquid-liquid+phase+transitions+of+gallium+at+high+pressure+and+temperature+with+X-ray+microtomography&rft.au=Li%2C+Renfeng%3BLi%2C+Liang%3BRivers%2C+M+L%3BLiu%2C+Haozhe%3BAnonymous&rft.aulast=Li&rft.aufirst=Renfeng&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-07-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Carbon-rich inner core inferred from anomalously low shear-wave velocity of non-magnetic Fe (sub 7) C (sub 3) AN - 1686060500; 2015-049063 AB - Recent studies suggest that Fe (sub 7) C (sub 3) is a candidate component of the Earth's inner core. Single-crystal X-ray diffraction measurements confirmed the stability of Fe (sub 7) C (sub 3) up to core pressures, and provide support for the scenario of carbon-rich inner core on the basis of density match [Chen et al., 2012]. To further test the hypothesis of Fe (sub 7) C (sub 3) -dominant inner core, we have performed nuclear resonant inelastic X-ray scattering (NRIXS) measurements of Fe (sub 7) C (sub 3) up to 150 GPa at 300 K, in order to determine the shear-wave (V (sub S) ) and compressional-wave (V (sub P) ) velocities for comparison with seismic models. Our results show that the high-spin to low-spin magnetic transition in Fe (sub 7) C (sub 3) near 50 GPa, as manifested by the change of compression behavior and our recent X-ray Emission Spectroscopy measurements, also significantly affects the pressure dependence of the V (sub S) and V (sub P) . Extrapolating the measured sound velocities to the relevant core pressures and temperatures, we found that the non-magnetic Fe (sub 7) C (sub 3) could reproduce the V (sub S) of the inner core, making it potentially the largest reservoir of carbon in Earth. JF - American Geophysical Union Fall Meeting AU - Chen, Bin AU - Li, Zeyu AU - Zhang, D AU - Zhao, J AU - Hu, M AU - Bi, W AU - Xiao, Y AU - Chow, P AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract MR11B EP - 06 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686060500?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Carbon-rich+inner+core+inferred+from+anomalously+low+shear-wave+velocity+of+non-magnetic+Fe+%28sub+7%29+C+%28sub+3%29&rft.au=Chen%2C+Bin%3BLi%2C+Zeyu%3BZhang%2C+D%3BZhao%2C+J%3BHu%2C+M%3BBi%2C+W%3BXiao%2C+Y%3BChow%2C+P%3BAnonymous&rft.aulast=Chen&rft.aufirst=Bin&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-06-05 N1 - CODEN - #07548 ER - TY - JOUR T1 - Iron oxidation state and compressional behaviors of Al, Fe-rich mantle silicate perovskite up to 90 GPa_ AN - 1673368383; 2015-033135 AB - Magnesium silicate perovskite, the dominant lower-mantle phase, may contain much more Al and Fe in the subducting oceanic crust than in the normal mantle. Therefore, it is important to understand the physical properties of Al,Fe-rich mantle silicate perovskite. We have synthesized Fe,Al-rich mantle silicate perovskites from two different starting materials [Mg (sub 2) FeAl (sub 2) Si (sub 3) O (sub 12) (Alm33) and Mg (sub 2.5) Fe (sub 0.5) Al (sub 2) Si (sub 3) O (sub 12) (Alm17)] and conducted in-situ synchrotron X-ray diffraction (GSECARS and HPCAT) and Mossbauer spectroscopy (Sector 3) in the laser heated diamond-anvil cell at Advanced Photon Source. The garnet starting materials were synthesized in the multi-anvil press at Arizona State University. The starting materials were mixed with 10 wt% Au powder (internal pressure standard) and loaded with an Ar or Ne pressure medium in the diamond-anvil cell for X-ray diffraction measurements. Pure starting materials are loaded in the diamond-anvil cell with an Ne or KCl pressure medium for synchrotron Mossbauer measurements. In synchrotron Mossbauer spectroscopy, we obtained pressure from the unit-cell volumes of pressure media combined with their equations of state. During the laser heating of the Alm33 starting material at approximately 66 GPa and approximately 2300 K, perovskite was synthesized with a small amount of stishovite. For the same starting material, pure perovskite was synthesized at 90 GPa and approximately 2300 K. For the Alm17 starting material, perovskite was synthesized with a small amount of stishovite at 65-92 GPa and approximately 2200K. Between 60 and 90 GPa, the unit-cell volumes of the Alm33 and Alm17 perovskites are only slightly higher (0.3-0.6%) than that of Mg-end member perovskite and are comparable to that of (Mg (sub 0.85) Fe (sub 0.15) )SiO (sub 3) perovskite, indicating higher density of the Al,Fe-rich perovskite in subducting oceanic crust than surrounding mantle. Both Al,Fe-rich perovskites show a steep increase in unit-cell volume during decompression between 60 and 40 GPa, suggesting either spin transition or metastability at the pressure range. We successfully quenched both Al,Fe-rich perovskites and measured the unit-cell volumes at 1 bar: 166.3+ or -0.1 Aa (super 3) for Alm17 perovskite, and 165.0+ or -0.2 Aa (super 3) for Alm33 perovskite. Our direct measurements indicate that the combined effects of Fe and Al on the unit-cell volume is much greater at lower pressures ( approximately 2%) than those observed at higher pressure (0.3-0.6%). The preliminary spectral fitting of synchrotron Mossbauer data indicates that 50 approximately 80% of iron is Fe (super 3+) in both Al,Fe-rich pervoskites, suggesting that similar degree of charge disproportionation reaction occurs in Al-rich mantle silicate perovskite. This result is in disagreement with a recent thermodynamic prediction by Nakajima et al. (2012, JGR) that Fe (super 3+) concentration may be very low (near zero) in Al-rich perovskite. JF - American Geophysical Union Fall Meeting AU - Zhang, Q AU - Shim, S AU - Meng, Y AU - Prakapenka, V AU - Alp, E E AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract DI41A EP - 2327 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673368383?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Iron+oxidation+state+and+compressional+behaviors+of+Al%2C+Fe-rich+mantle+silicate+perovskite+up+to+90+GPa_&rft.au=Zhang%2C+Q%3BShim%2C+S%3BMeng%2C+Y%3BPrakapenka%2C+V%3BAlp%2C+E+E%3BAnonymous&rft.aulast=Zhang&rft.aufirst=Q&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Disproportionation of (Mg,Fe)SiO3 into MgSiO3 perovskite and an Fe-rich hexagonal silicate in the deep lower mantle AN - 1673366847; 2015-035177 AB - Models of the Earth's deep interior have been built upon the basic assumption that the lower mantle down to the top of the D" layer mainly consists of orthorhombic perovskite (pv) with nominally 10 mol% Fe. Using a laser-heated diamond anvil cell, our experiments at pressures of 95-105 GPa and temperatures of 2200 approximately 2400 K show that such perovskite is unstable; it loses its Fe and disproportionates into a nearly Fe-free MgSiO3 pv and an Fe-rich (Mg,Fe)SiO3 phase with a previously unknown hexagonal structure, causing a small volume reduction. Using the newly developed high-pressure multigrain crystallography technique, we have identified 154 individual crystallites belonging to the hexagonal phase in one experiment, each has a unique orientation matrix with as many as 27 diffraction spots that gives identical unit-cell parameters, while 130 individual crystallites of the coexisting pv phase were indexed to the known Pbnm space group. This new mineral physics observation leads to a fresh view on geophysical, geochemical and geodynamic paradigms for the lower mantle below 2000 kilometers depth. JF - American Geophysical Union Fall Meeting AU - Zhang, L AU - Meng, Y AU - Yang, W AU - Wang, L AU - Mao, W L AU - Zeng, Q C AU - Jeong, J AU - Wagner, A J AU - Mkhoyan, K AU - Liu, W AU - Xu, R AU - Mao, H AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract DI51A EP - 2277 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366847?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Disproportionation+of+%28Mg%2CFe%29SiO3+into+MgSiO3+perovskite+and+an+Fe-rich+hexagonal+silicate+in+the+deep+lower+mantle&rft.au=Zhang%2C+L%3BMeng%2C+Y%3BYang%2C+W%3BWang%2C+L%3BMao%2C+W+L%3BZeng%2C+Q+C%3BJeong%2C+J%3BWagner%2C+A+J%3BMkhoyan%2C+K%3BLiu%2C+W%3BXu%2C+R%3BMao%2C+H%3BAnonymous&rft.aulast=Zhang&rft.aufirst=L&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-16 N1 - CODEN - #07548 ER - TY - JOUR T1 - Sound velocities of bcc-Fe and Fe0.85Si0.15 alloy at high pressure and temperature AN - 1668229184; 2015-030876 AB - Fe-Si alloy has been suggested to be the major component of the Earth's core. High pressure-temperature and Si alloying effects on sound velocities of Fe are of great importance to establish satisfactorily geophysical and geochemical models of the core. To date, the nature of the stable phase of iron in the Earth's inner core is still on debate. Several recent theoretical and experimental studies have suggested that Fe in the core would be stabilized in the body-centered cubic (bcc) phase with respect to the hexagonal close-packed (hcp) phase. These studies have further concluded that the addition of Si in the core can also enhance the stability of the bcc-Fe. Therefore, it is also of critical importance to understand the elastic behavior of bcc Fe-Si alloys at high pressure and temperature. However, there are only a few studies on sound velocities of bcc-Fe either at high pressure or at high temperature. Here we have investigated the compressional wave velocity (VP) and density (rho ) profiles of bcc-Fe and Fe0.85Si0.15 alloy (8 wt% Si) using high-energy resolution inelastic X-ray scattering (HERIX) and synchrotron X-ray diffraction spectroscopies in an externally-heated diamond anvil cell (EHDAC) at high P-T conditions. Our results show a strong VP reduction at elevated temperatures even at a constant density. Compared with the literature velocity results for bcc and hcp Fe-Si alloys, the bcc-Fe and Fe-Si alloy exhibit higher VP than their hcp phase counterparts at the bcc-hcp transition pressures. If the bcc phase is present in Earth's inner core, our results here indicate that a few wt% of Si as the major light element is needed to compensate the density-velocity deficit of the inner core. Due to the extremely high elastic anisotropy of bcc Fe-Si alloy, a certain portion of the bcc Fe-Si alloy with the lattice-preferred orientation can produce VP and VS anisotropies to potentially account for the observed seismic anisotropy in the inner core. JF - American Geophysical Union Fall Meeting AU - Liu, J AU - Lin, J AU - Alatas, A AU - Bi, W AU - Anonymous Y1 - 2013/12// PY - 2013 DA - December 2013 SP - Abstract DI23A EP - 2301 PB - American Geophysical Union, Washington, DC VL - 2013 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1668229184?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Sound+velocities+of+bcc-Fe+and+Fe0.85Si0.15+alloy+at+high+pressure+and+temperature&rft.au=Liu%2C+J%3BLin%2C+J%3BAlatas%2C+A%3BBi%2C+W%3BAnonymous&rft.aulast=Liu&rft.aufirst=J&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2013 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Performance of U-silicide coated U-Mo fuel particle dispersion in Al during irradiation AN - 1671602237; 20460102 AB - The main issue in the process of developing a high-U density U-Mo/Al dispersion fuel is the formation of a UMo-Al interaction layer (IL) growth at the interface between the fuel and matrix. Kim et al. reported that IL growth was reduced as Si reduced Al diffusion to U-Mo [1],[2]. As the fuel loading increases, however, the total amount of Si is reduced in the fuel meat. Furthermore, the effective Si amount available to nearby U-Mo particles decreases locally where the fuel particle population is high. All of the above reduce the effect of Si addition in suppressing IL growth. JF - Transactions of the American Nuclear Society AU - Kim, Yeon Soo AU - Park, J M AU - Ryu, H J AD - Argonne National Laboratory, 9700 S. Cass Ave, Argonne, IL 60439, USA yskim@anl.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 606 EP - 607 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Meat KW - Dispersions KW - Silicon KW - Fuels KW - Density KW - Aluminum KW - Retarding KW - Diffusion UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671602237?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Performance+of+U-silicide+coated+U-Mo+fuel+particle+dispersion+in+Al+during+irradiation&rft.au=Kim%2C+Yeon+Soo%3BPark%2C+J+M%3BRyu%2C+H+J&rft.aulast=Kim&rft.aufirst=Yeon&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=606&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Multiple-stage Fuel Cycle Options Based on Subcritical Systems AN - 1671600350; 20460331 AB - The ongoing effort to perform nuclear fuel cycle options development for the U.S. Department of Energy, Office of Nuclear Energy (DOE-NE) requires the collection of information in a consistent, documented, highly qualified and traceable manner. As part of this effort, a structured template called a Fuel Cycle Data Package (FCDP) [1,2] has been created as a mean for providing the necessary information needed to assess a fuel cycle option and compare it with others. Evaluation groups have been initially identified in an effort to cover the range of possible fuel cycle options, each being represented by a fuel cycle option in order to determine the various performance characteristics. JF - Transactions of the American Nuclear Society AU - Heidet, F AU - Kim, T K AU - Taiwo, T A AD - Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 fheidet@anl.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 1468 EP - 1471 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Collection KW - Packages KW - Energy (nuclear) KW - Fuel cycles KW - Nuclear fuels KW - Offices KW - Nuclear reactor components KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671600350?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Fission+induced+swelling+and+creep+of+U-Mo+alloy+fuel&rft.au=Kim%2C+Yeon+Soo%3BHofman%2C+G+L%3BCheon%2C+J+S%3BRobinson%2C+A+B%3BWachs%2C+D+M&rft.aulast=Kim&rft.aufirst=Yeon&rft.date=2013-06-01&rft.volume=437&rft.issue=1-3&rft.spage=37&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Investigation of Sodium-Cooled Fast Reactor Active Control for Use with the Supercritical Carbon Dioxide Brayton Cycle AN - 1567093085; 20460231 AB - The supercritical carbon dioxide a(S-CO sub(2)) Brayton cycle is an innovative and transformational energy conversion technology for advanced Liquid Metal-Cooled Fast Reactors. The S-CO sub(2)Brayton cycle offers the potential for lower capital costs for Sodium-Cooled Fast Reactors (SFRs) than the traditional Rankine superheated steam cycle by eliminating the need to accommodate sodium-water reactions which adds to the plant cost, while providing higher cycle efficiency than the steam cycle for higher SFR core outlet temperatures (e.g., 45 % at 550 parallel C) further reducing the SFR plant cost per unit electrical power and increasing the plant net present value. JF - Transactions of the American Nuclear Society AU - Moisseytsev, Anton AU - Sienicki, James J AD - Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL, 60435 Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 1095 EP - 1098 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Costs KW - Nuclear power generation KW - Nuclear reactors KW - Power plants KW - Nuclear reactor components KW - Carbon dioxide KW - Steam electric power generation KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567093085?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Investigation+of+Sodium-Cooled+Fast+Reactor+Active+Control+for+Use+with+the+Supercritical+Carbon+Dioxide+Brayton+Cycle&rft.au=Moisseytsev%2C+Anton%3BSienicki%2C+James+J&rft.aulast=Moisseytsev&rft.aufirst=Anton&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=1095&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-11-05 ER - TY - JOUR T1 - ITRAP+10 Testing of Gamma and Neutron Search Devices AN - 1567089696; 20460266 AB - The Illicit Trafficking Radiation Assessment Program (ITRAP+10) is evaluating and comparing the performance of available commercial radiation detection equipment against accepted standards [1], ITRAP+10 was initiated by the European Union (EU), with collaboration from the U.S. Department of Homeland Security Domestic Nuclear Detection Office (DNDO), the U.S. Department of Energy, and the International Atomic Energy Agency. JF - Transactions of the American Nuclear Society AU - Klann, R AU - Mannino, M AU - Brandt, L AU - Murphy, L AD - Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439 klann@anl.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 1227 EP - 1230 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Energy (nuclear) KW - Assessments KW - Devices KW - Domestic KW - Searching KW - Standards KW - Homeland security KW - Offices UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567089696?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=ITRAP%2B10+Testing+of+Gamma+and+Neutron+Search+Devices&rft.au=Klann%2C+R%3BMannino%2C+M%3BBrandt%2C+L%3BMurphy%2C+L&rft.aulast=Klann&rft.aufirst=R&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=1227&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-11-05 ER - TY - JOUR T1 - SHARP FUEL ASSEMBLY COUPLED SIMULATION DEMONSTRATIONS AN - 1567056165; 20460147 AB - The DOE's Nuclear Energy and Advanced Modeling and Simulation (NEAMS) Reactor Product Line (RPL) [1] provides an integrated multiphysics simulation capability for the design and analysis of future generations of nuclear power plants. The RPL multiresolution hierarchy is being designed to ultimately span the full range of length and time scales present in relevant reactor design and safety analyses scenarios. Accomplishing this aggressive goal requires that RPL components exhibit good parallel scalability from desktop to petaflop computing platforms. JF - Transactions of the American Nuclear Society AU - Mahadevan, V AU - Merzari, E AU - Jain, R AU - Obabko, A AU - Smith, M AU - Tautges, T AU - Fischer, P AU - Pointer, W D AU - Ferencz, R AD - Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 mahadevan@anl.gov Y1 - 2013/11/14/ PY - 2013 DA - 2013 Nov 14 SP - 774 EP - 778 PB - American Nuclear Society, Inc. VL - 109 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear power generation KW - Nuclear reactors KW - Computer simulation KW - Nuclear safety KW - Hierarchies KW - Assembly KW - Nuclear reactor components KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1567056165?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Nuclear+Fuel+Cycle+Analysis+and+Optimization+with+the+Code+for+Advanced+Fuel+Cycles+Assessment+%28CAFCA%29&rft.au=Brinton%2C+Samuel%3BPasserini%2C+Stefano%3BKazimi%2C+Mujid&rft.aulast=Brinton&rft.aufirst=Samuel&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=131&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2014-11-05 ER - TY - CPAPER T1 - Charged Block Copolymer Assemblies Driven By Complex Coacervation T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490520644; 6253907 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Priftis, Dimitrios AU - Leon, Lorraine AU - Perry, Sarah AU - Kade, Matthew AU - Tirrell, Matthew Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Coacervation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490520644?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Charged+Block+Copolymer+Assemblies+Driven+By+Complex+Coacervation&rft.au=Priftis%2C+Dimitrios%3BLeon%2C+Lorraine%3BPerry%2C+Sarah%3BKade%2C+Matthew%3BTirrell%2C+Matthew&rft.aulast=Priftis&rft.aufirst=Dimitrios&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Assembling Colloidal Clusters From Spherical Codes T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490520465; 6253371 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Phillips, Carolyn AU - Jankowski, Eric AU - Marval, Michelle AU - Glotzer, Sharon Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Construction UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490520465?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Assembling+Colloidal+Clusters+From+Spherical+Codes&rft.au=Phillips%2C+Carolyn%3BJankowski%2C+Eric%3BMarval%2C+Michelle%3BGlotzer%2C+Sharon&rft.aulast=Phillips&rft.aufirst=Carolyn&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Design of Catalysts At the Subnanometer to Nanometer Scale: Tuning Performance Via Size, Composition, Doping, Support and Assembly T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490518260; 6253517 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Vajda, Stefan Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Catalysts UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490518260?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Design+of+Catalysts+At+the+Subnanometer+to+Nanometer+Scale%3A+Tuning+Performance+Via+Size%2C+Composition%2C+Doping%2C+Support+and+Assembly&rft.au=Vajda%2C+Stefan&rft.aulast=Vajda&rft.aufirst=Stefan&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Discovering Crystals Using Shape Matching and Machine Learning T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490517531; 6253497 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Phillips, Carolyn AU - Voth, Gregory Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Learning algorithms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490517531?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Discovering+Crystals+Using+Shape+Matching+and+Machine+Learning&rft.au=Phillips%2C+Carolyn%3BVoth%2C+Gregory&rft.aulast=Phillips&rft.aufirst=Carolyn&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Comparison of Different Gravure Cell Geometries Using a Potential Energy Framework T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490516264; 6249902 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Boelens, Arnout AU - de Pablo, Juan Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Potential energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490516264?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Comparison+of+Different+Gravure+Cell+Geometries+Using+a+Potential+Energy+Framework&rft.au=Boelens%2C+Arnout%3Bde+Pablo%2C+Juan&rft.aulast=Boelens&rft.aufirst=Arnout&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Polyelectrolyte Complex Formation: Structure and Properties T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490516232; 6249212 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Tirrell, Matthew Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Polyelectrolytes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490516232?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Polyelectrolyte+Complex+Formation%3A+Structure+and+Properties&rft.au=Tirrell%2C+Matthew&rft.aulast=Tirrell&rft.aufirst=Matthew&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - A Naive Bayesian Classifier of Gram Stain Phenotypes From Genotype Functional Roles T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490516219; 6249640 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Colasanti, Ricardo Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Genotypes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490516219?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=A+Naive+Bayesian+Classifier+of+Gram+Stain+Phenotypes+From+Genotype+Functional+Roles&rft.au=Colasanti%2C+Ricardo&rft.aulast=Colasanti&rft.aufirst=Ricardo&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Polyelectrolyte Complex Micelles As Vehicles for miRNA Delivery T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490516129; 6249114 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Leon Gibbons, Lorraine AU - Perry, Sarah AU - Priftis, Dimitrios AU - Kade, Matthew AU - Wong, Derek AU - Tirrell, Matthew Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Polyelectrolytes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490516129?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Polyelectrolyte+Complex+Micelles+As+Vehicles+for+miRNA+Delivery&rft.au=Leon+Gibbons%2C+Lorraine%3BPerry%2C+Sarah%3BPriftis%2C+Dimitrios%3BKade%2C+Matthew%3BWong%2C+Derek%3BTirrell%2C+Matthew&rft.aulast=Leon+Gibbons&rft.aufirst=Lorraine&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - A Nonlinear Interior Point Framework for Stochastic PDEs Over Networks T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490516099; 6249132 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Zavala, Victor Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Stochasticity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490516099?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Use+of+Multi-fidelity+Training+Data+in+Uncertainty+Analysis+of+Nuclear+Engineering+Applications&rft.au=Roderick%2C+Oleg%3BAnitescu%2C+Mihai&rft.aulast=Roderick&rft.aufirst=Oleg&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=449&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Stereoregularity Inhibits Complex Coacervation of Polypeptides T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490516021; 6249109 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Perry, Sarah AU - Leon, Lorraine AU - Kade, Matthew AU - Megley, Katie AU - Priftis, Dimitrios AU - Wong, Derek AU - Margossian, Khatcher AU - Tirrell, Matthew Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Polypeptides UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490516021?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Stereoregularity+Inhibits+Complex+Coacervation+of+Polypeptides&rft.au=Perry%2C+Sarah%3BLeon%2C+Lorraine%3BKade%2C+Matthew%3BMegley%2C+Katie%3BPriftis%2C+Dimitrios%3BWong%2C+Derek%3BMargossian%2C+Khatcher%3BTirrell%2C+Matthew&rft.aulast=Perry&rft.aufirst=Sarah&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Atomic Layer Deposition (ALD) On the Nanostructured Li-Mn-Rich Composite Li1.2Ni0.13Mn0.54Co0.13O2 Cathode Powder T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490515895; 6249603 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Zhang, Xiaofeng AU - Belharouak, Ilias Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Composite materials UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490515895?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Atomic+Layer+Deposition+%28ALD%29+On+the+Nanostructured+Li-Mn-Rich+Composite+Li1.2Ni0.13Mn0.54Co0.13O2+Cathode+Powder&rft.au=Zhang%2C+Xiaofeng%3BBelharouak%2C+Ilias&rft.aulast=Zhang&rft.aufirst=Xiaofeng&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Microfluidic Platforms for Time Resolved Laue Crystallography T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490514795; 6251896 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Perry, Sarah AU - Pawate, Ashtamurthy AU - Schieferstein, Jeremy AU - Guha, Sudipto AU - Srajer, Vukica AU - Ren, Zhong AU - Kenis, Paul Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Microfluidics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490514795?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Microfluidic+Platforms+for+Time+Resolved+Laue+Crystallography&rft.au=Perry%2C+Sarah%3BPawate%2C+Ashtamurthy%3BSchieferstein%2C+Jeremy%3BGuha%2C+Sudipto%3BSrajer%2C+Vukica%3BRen%2C+Zhong%3BKenis%2C+Paul&rft.aulast=Perry&rft.aufirst=Sarah&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Atomistic Simulation of Polyglutamine in Solution T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490514310; 6252381 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Fluitt, Aaron AU - de Pablo, Juan Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Simulation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490514310?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Atomistic+Simulation+of+Polyglutamine+in+Solution&rft.au=Fluitt%2C+Aaron%3Bde+Pablo%2C+Juan&rft.aulast=Fluitt&rft.aufirst=Aaron&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Large-Scale Reconstruction and Analysis of High Quality Core Metabolic Models for Over 8000 Microbial Genomes T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490513436; 6252182 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Edirisinghe, Janaka AU - Conrad, Neal AU - Frybarger, Paul AU - Shabbeer, Amina AU - Henry, Christopher Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Genomes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490513436?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Large-Scale+Reconstruction+and+Analysis+of+High+Quality+Core+Metabolic+Models+for+Over+8000+Microbial+Genomes&rft.au=Edirisinghe%2C+Janaka%3BConrad%2C+Neal%3BFrybarger%2C+Paul%3BShabbeer%2C+Amina%3BHenry%2C+Christopher&rft.aulast=Edirisinghe&rft.aufirst=Janaka&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - The Design of Peptide Amphiphile Micelles for Diagnostic Applications in Atherosclerosis T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490511452; 6248866 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Chung, Eun AU - Drews, Laurie AU - Tirrell, Matthew Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Peptides UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490511452?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=The+Design+of+Peptide+Amphiphile+Micelles+for+Diagnostic+Applications+in+Atherosclerosis&rft.au=Chung%2C+Eun%3BDrews%2C+Laurie%3BTirrell%2C+Matthew&rft.aulast=Chung&rft.aufirst=Eun&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Rate Constants and Branching Ratios for Hydrogen Abstractions By OH, H and CH3 From Methanol and Its Deuterated Isomers T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490509362; 6250327 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Labbe, Nicole AU - Peukert, Sebastian AU - Sivaramakrishnan, Raghu AU - Michael, Joe Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Hydrogen UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490509362?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Rate+Constants+and+Branching+Ratios+for+Hydrogen+Abstractions+By+OH%2C+H+and+CH3+From+Methanol+and+Its+Deuterated+Isomers&rft.au=Labbe%2C+Nicole%3BPeukert%2C+Sebastian%3BSivaramakrishnan%2C+Raghu%3BMichael%2C+Joe&rft.aulast=Labbe&rft.aufirst=Nicole&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Temperature and Pressure Dependent Rate Coefficients for the Reaction of Vinyl Radical With Molecular Oxygen T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490509342; 6250333 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Goldsmith, C AU - Harding, L AU - Miller, J AU - Klippenstein, Stephen Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Temperature effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490509342?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Temperature+and+Pressure+Dependent+Rate+Coefficients+for+the+Reaction+of+Vinyl+Radical+With+Molecular+Oxygen&rft.au=Goldsmith%2C+C%3BHarding%2C+L%3BMiller%2C+J%3BKlippenstein%2C+Stephen&rft.aulast=Goldsmith&rft.aufirst=C&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Phosphorylated Amphiphilic Pegs: Next Generation Anti-Microbials T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490509271; 6250459 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Kade, Matthew AU - Zaborina, Olga AU - Zaborin, Alexander AU - Defazio, Jennifer AU - Alverdy, John AU - Tirrell, Matthew Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Chemical engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490509271?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Phosphorylated+Amphiphilic+Pegs%3A+Next+Generation+Anti-Microbials&rft.au=Kade%2C+Matthew%3BZaborina%2C+Olga%3BZaborin%2C+Alexander%3BDefazio%2C+Jennifer%3BAlverdy%2C+John%3BTirrell%2C+Matthew&rft.aulast=Kade&rft.aufirst=Matthew&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Separations of Organic Acids From Pyrolysis Bio-Oil T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490509267; 6250008 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Lin, Yupo AU - Sather, Norman AU - Libera, Joseph AU - Snyder, Seth Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Pyrolysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490509267?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Small+%28Weinheim+an+der+Bergstrasse%2C+Germany%29&rft.atitle=Plasmonic+amplifiers%3A+engineering+giant+light+enhancements+by+tuning+resonances+in+multiscale+plasmonic+nanostructures.&rft.au=Chen%2C+Aiqing%3BMiller%2C+Ryan+L%3BDePrince%2C+A+Eugene%3BJoshi-Imre%2C+Alexandra%3BShevchenko%2C+Elena%3BOcola%2C+Leonidas+E%3BGray%2C+Stephen+K%3BWelp%2C+Ulrich%3BVlasko-Vlasov%2C+Vitalii+K&rft.aulast=Chen&rft.aufirst=Aiqing&rft.date=2013-06-10&rft.volume=9&rft.issue=11&rft.spage=1939&rft.isbn=&rft.btitle=&rft.title=Small+%28Weinheim+an+der+Bergstrasse%2C+Germany%29&rft.issn=1613-6829&rft_id=info:doi/10.1002%2Fsmll.201202216 L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Peptide Amphiphiles: Modular Construction Of Biomaterials T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490509003; 6250446 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Tirrell, Matthew Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Biomaterials UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490509003?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Peptide+Amphiphiles%3A+Modular+Construction+Of+Biomaterials&rft.au=Tirrell%2C+Matthew&rft.aulast=Tirrell&rft.aufirst=Matthew&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Reconciling Gene Expression Data With Regulatory Network Models - A Stimulon-Based Approach for Integrated Metabolic and Regulatory Modeling of Bacillus Subtilis T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490508784; 6253044 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Faria, Jose AU - Overbeek, Ross AU - Taylor, Ronald AU - Goelzer, Anne AU - Fromion, Vincent AU - Rocha, Miguel AU - Rocha, Isabel AU - Henry, Christopher Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Gene expression KW - Bacillus subtilis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490508784?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Reconciling+Gene+Expression+Data+With+Regulatory+Network+Models+-+A+Stimulon-Based+Approach+for+Integrated+Metabolic+and+Regulatory+Modeling+of+Bacillus+Subtilis&rft.au=Faria%2C+Jose%3BOverbeek%2C+Ross%3BTaylor%2C+Ronald%3BGoelzer%2C+Anne%3BFromion%2C+Vincent%3BRocha%2C+Miguel%3BRocha%2C+Isabel%3BHenry%2C+Christopher&rft.aulast=Faria&rft.aufirst=Jose&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Comparison of Methodologies Between Greet Life Cycle Analysis and Life-Cycle Analysis-Based Fuels Regulations T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490506124; 6251790 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Wang, Michael Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Life cycle UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490506124?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Comparison+of+Methodologies+Between+Greet+Life+Cycle+Analysis+and+Life-Cycle+Analysis-Based+Fuels+Regulations&rft.au=Wang%2C+Michael&rft.aulast=Wang&rft.aufirst=Michael&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Experimental Investigation of Multiphase Mixing in Annular Centrifugal Contactors Using High-Speed Imaging and Electrical Resistance Tomography (ERT) T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490505395; 6251605 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Wardle, Kent Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Imaging techniques UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490505395?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Experimental+Investigation+of+Multiphase+Mixing+in+Annular+Centrifugal+Contactors+Using+High-Speed+Imaging+and+Electrical+Resistance+Tomography+%28ERT%29&rft.au=Wardle%2C+Kent&rft.aulast=Wardle&rft.aufirst=Kent&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Ultra-High Frequency Electric Field Effects On Oxygen Vacancy Concentration in Oxide Thin Films T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490503903; 6252749 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Sankaranarayanan, Subramanian Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Oxygen UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490503903?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Ultra-High+Frequency+Electric+Field+Effects+On+Oxygen+Vacancy+Concentration+in+Oxide+Thin+Films&rft.au=Sankaranarayanan%2C+Subramanian&rft.aulast=Sankaranarayanan&rft.aufirst=Subramanian&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - CPAPER T1 - Hybrid Multiphase CFD Simulation for Interfacial Area Prediction in Liquid-Liquid Extraction T2 - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AN - 1490503183; 6251024 JF - 2013 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2013) AU - Wardle, Kent Y1 - 2013/11/03/ PY - 2013 DA - 2013 Nov 03 KW - Prediction UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1490503183?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Hybrid+Multiphase+CFD+Simulation+for+Interfacial+Area+Prediction+in+Liquid-Liquid+Extraction&rft.au=Wardle%2C+Kent&rft.aulast=Wardle&rft.aufirst=Kent&rft.date=2013-11-03&rft.volume=&rft.issue=2&rft.spage=359&rft.isbn=&rft.btitle=&rft.title=Climatic+Change&rft.issn=01650009&rft_id=info:doi/10.1007%2Fs10584-013-0730-7 L2 - https://aiche.confex.com/aiche/2013/webprogram/meeting2013-11-03.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-30 N1 - Last updated - 2014-02-10 ER - TY - JOUR T1 - Crystal structure, Raman and FTIR spectroscopy, and equations of state of OH-bearing MgSiO (sub 3) akimotoite AN - 1464887488; 2013-093472 AB - MgSiO (sub 3) akimotoite is stable relative to majorite-garnet under low-temperature geotherms within steeply or rapidly subducting slabs. Two compositions of Mg-akimotoite were synthesized under similar conditions: Z674 (containing about 550 ppm wt H (sub 2) O) was synthesized at 22 GPa and 1,500 degrees C and SH1101 (nominally anhydrous) was synthesized at 22 GPa and 1,250 degrees C. Crystal structures of both samples differ significantly from previous studies to give slightly smaller Si sites and larger Mg sites. The bulk thermal expansion coefficients of Z674 are (153-839 K) of a (sub 1) = 20(3) X 10 (super -9) K (super -2) and a (sub 0) = 17(2) X 10 (super -6) K (super -1) , with an average of alpha (sub 0) = 27.1(6) X 10 (super -6) K (super -1) . Compressibility at ambient temperature of Z674 was measured up to 34.6 GPa at Sector 13 (GSECARS) at Advanced Photon Source Argonne National Laboratory. The second-order Birch-Murnaghan equation of state (BM2 EoS) fitting yields: V (sub 0) = 263.7(2) Aa (super 3) , K (sub T0) = 217(3) GPa (K' fixed at 4). The anisotropies of axial thermal expansivities and compressibilities are similar: alpha (sub a) = 8.2(3) and alpha (sub c) = 10.68(9) (10 (super -6) K (super -1) ); beta (sub a) = 11.4(3) and beta (sub c) = 15.9(3) (10 (super -4) GPa). Hydration increases both the bulk thermal expansivity and compressibility, but decreases the anisotropy of structural expansion and compression. Complementary Raman and Fourier transform infrared (FTIR) spectroscopy shows multiple structural hydration sites. Low-temperature and high-pressure FTIR spectroscopy (15-300 K and 0-28 GPa) confirms that the multiple sites are structurally unique, with zero-pressure intrinsic anharmonic mode parameters between -1.02 X 10 (super -5) and +1.7 X 10 (super -5) K (super -1) , indicating both weak hydrogen bonds (O-H...O) and strong OH bonding due to long O...O distances. Copyright 2013 Springer-Verlag Berlin Heidelberg JF - Contributions to Mineralogy and Petrology AU - Ye, Yu AU - Smyth, Joseph R AU - Jacobsen, Steven D AU - Panero, Wendy R AU - Brown, David A AU - Katsura, Tomoo AU - Chang, Yun-Yuan AU - Townsend, Joshua P AU - Dera, Przemyslaw AU - Tkachev, Sergey AU - Unterborn, Cayman AU - Liu, Zhenxian AU - Goujon, Celine Y1 - 2013/11// PY - 2013 DA - November 2013 SP - 1375 EP - 1388 PB - Springer International, Heidelberg - New York VL - 166 IS - 5 SN - 0010-7999, 0010-7999 KW - silicates KW - experimental studies KW - refinement KW - subduction zones KW - X-ray diffraction data KW - crystal structure KW - calibration KW - akimotoite KW - thermal expansion KW - infrared spectra KW - FTIR spectra KW - Raman spectra KW - water content KW - spectra KW - equations of state KW - anvil cells KW - crystal chemistry KW - chemical composition KW - P-T conditions KW - compressibility KW - 01B:Mineralogy of silicates KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1464887488?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Contributions+to+Mineralogy+and+Petrology&rft.atitle=Crystal+structure%2C+Raman+and+FTIR+spectroscopy%2C+and+equations+of+state+of+OH-bearing+MgSiO+%28sub+3%29+akimotoite&rft.au=Ye%2C+Yu%3BSmyth%2C+Joseph+R%3BJacobsen%2C+Steven+D%3BPanero%2C+Wendy+R%3BBrown%2C+David+A%3BKatsura%2C+Tomoo%3BChang%2C+Yun-Yuan%3BTownsend%2C+Joshua+P%3BDera%2C+Przemyslaw%3BTkachev%2C+Sergey%3BUnterborn%2C+Cayman%3BLiu%2C+Zhenxian%3BGoujon%2C+Celine&rft.aulast=Ye&rft.aufirst=Yu&rft.date=2013-11-01&rft.volume=166&rft.issue=5&rft.spage=1375&rft.isbn=&rft.btitle=&rft.title=Contributions+to+Mineralogy+and+Petrology&rft.issn=00107999&rft_id=info:doi/10.1007%2Fs00410-013-0933-y L2 - http://www.springerlink.com/(zmx2wiu4y01pcgigj5i3jxf5)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100406,1 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2013-01-01 N1 - Number of references - 45 N1 - Document feature - illus. incl. 8 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-12-05 N1 - CODEN - CMPEAP N1 - SubjectsTermNotLitGenreText - akimotoite; anvil cells; calibration; chemical composition; compressibility; crystal chemistry; crystal structure; equations of state; experimental studies; FTIR spectra; infrared spectra; P-T conditions; Raman spectra; refinement; silicates; spectra; subduction zones; thermal expansion; water content; X-ray diffraction data DO - http://dx.doi.org/10.1007/s00410-013-0933-y ER - TY - JOUR T1 - Kinetic pathway of palladium nanoparticle sulfidation process at high temperatures. AN - 1443415984; 24067076 AB - A significant issue related to Palladium (Pd) based catalysts is that sulfur-containing species, such as alkanethiols, can form a PdSx underlayer on nanoparticle surface and subsequently poison the catalysts. Understanding the exact reaction pathway, the degree of sulfidation, the chemical stoichiometry, and the temperature dependence of this process is critically important. Combining energy-filtered transmission electron microscopy (EFTEM), X-ray diffraction (XRD), and X-ray absorption spectroscopy experiments at the S K-, Pd K-, and L2,3-edges, we show the kinetic pathway of Pd nanoparticle sulfidation process with the addition of excess amount of octadecanethiol at different temperatures, up to 250 °C. We demonstrate that the initial polycrystalline Pd-oleylamine nanoparticles gradually become amorphous PdSx nanoparticles, with the sulfur atomic concentration eventually saturating at Pd/S = 66:34 at 200 °C. This final chemical stoichiometry of the sulfurized nanoparticles closely matches that of the crystalline P16S7 phase (30.4% S), albeit being structurally amorphous. Sulfur diffusion into the nanoparticle depends strongly on the temperature. At 90 °C, sulfidation remains limited at the surface of nanoparticles even with extended heating time; whereas at higher temperatures beyond 125 °C, sulfidation occurs rapidly in the interior of the particles, far beyond what can be described as a core-shell model. This indicates sulfur diffusion from the surface to the interior of the particle is subject to a diffusion barrier and likely first go through the grain boundaries of the nanoparticle. JF - Nano letters AU - Liu, Yi AU - Sun, Chengjun AU - Bolin, Trudy AU - Wu, Tianpin AU - Liu, Yuzi AU - Sternberg, Michael AU - Sun, Shouheng AU - Lin, Xiao-Min AD - Center for Nanoscale Materials and ‡Advanced Photon Source, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States. Y1 - 2013/10/09/ PY - 2013 DA - 2013 Oct 09 SP - 4893 EP - 4901 VL - 13 IS - 10 KW - Palladium KW - 5TWQ1V240M KW - Gold KW - 7440-57-5 KW - Index Medicus KW - Hot Temperature KW - X-Ray Absorption Spectroscopy KW - X-Ray Diffraction KW - Kinetics KW - Catalysis KW - Palladium -- chemistry KW - Metal Nanoparticles -- chemistry KW - Gold -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1443415984?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nano+letters&rft.atitle=Kinetic+pathway+of+palladium+nanoparticle+sulfidation+process+at+high+temperatures.&rft.au=Liu%2C+Yi%3BSun%2C+Chengjun%3BBolin%2C+Trudy%3BWu%2C+Tianpin%3BLiu%2C+Yuzi%3BSternberg%2C+Michael%3BSun%2C+Shouheng%3BLin%2C+Xiao-Min&rft.aulast=Liu&rft.aufirst=Yi&rft.date=2013-10-09&rft.volume=13&rft.issue=10&rft.spage=4893&rft.isbn=&rft.btitle=&rft.title=Nano+letters&rft.issn=1530-6992&rft_id=info:doi/10.1021%2Fnl402768b LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-05-13 N1 - Date created - 2013-10-09 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1021/nl402768b ER - TY - JOUR T1 - Analysis of periplasmic sensor domains from Anaeromyxobacter dehalogenans 2CP-C: Structure of one sensor domain from a histidine kinase and another from a chemotaxis protein AN - 1780511945; PQ0001957690 AB - Anaeromyxobacter dehalogenans is a delta -proteobacterium found in diverse soils and sediments. It is of interest in bioremediation efforts due to its dechlorination and metal-reducing capabilities. To gain an understanding on A. dehalogenans' abilities to adapt to diverse environments we analyzed its signal transduction proteins. The A. dehalogenans genome codes for a large number of sensor histidine kinases (HK) and methyl-accepting chemotaxis proteins (MCP); among these 23 HK and 11 MCP proteins have a sensor domain in the periplasm. These proteins most likely contribute to adaptation to the organism's surroundings. We predicted their three-dimensional folds and determined the structures of two of the periplasmic sensor domains by X-ray diffraction. Most of the domains are predicted to have either PAS-like or helical bundle structures, with two predicted to have solute-binding protein fold, and another predicted to have a 6-phosphogluconolactonase like fold. Atomic structures of two sensor domains confirmed the respective fold predictions. The Adeh_2942 sensor (HK) was found to have a helical bundle structure, and the Adeh_3718 sensor (MCP) has a PAS-like structure. Interestingly, the Adeh_3718 sensor has an acetate moiety bound in a binding site typical for PAS-like domains. Future work is needed to determine whether Adeh_3718 is involved in acetate sensing by A. dehalogenans. The Anaeromyxobacter dehalogenans CP-C genome codes for a large number of sensor histidine kinases (HK) and methyl accepting chemotaxis proteins (MCP); among these 23 HK and 11 MCP proteins have a sensor domain in the periplasm. These proteins most likely contribute to adaptation to the organism's surroundings. We predicted their three-dimensional folds and determined the structures of two of the periplasmic sensor domains by X-ray diffraction. JF - MicrobiologyOpen AU - Pokkuluri, PRaj AU - Dwulit-Smith, Jeff AU - Duke, Norma E AU - Wilton, Rosemarie AU - Mack, Jamey C AU - Bearden, Jessica AU - Rakowski, Ella AU - Babnigg, Gyorgy AU - Szurmant, Hendrik AU - Joachimiak, Andrzej AU - Schiffer, Marianne AD - Biosciences, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois, 60439. Y1 - 2013/10// PY - 2013 DA - October 2013 SP - 766 EP - 777 PB - Wiley Subscription Services, Inc. VL - 2 IS - 5 SN - 2045-8827, 2045-8827 KW - Microbiology Abstracts A: Industrial & Applied Microbiology KW - solute-binding protein KW - Genomes KW - Histidine kinase KW - Dechlorination KW - Bioremediation KW - Adaptations KW - 6-Phosphogluconolactonase KW - X-ray diffraction KW - Monocyte chemoattractant protein KW - Acetic acid KW - Chemotaxis KW - Sediments KW - Soil KW - Anaeromyxobacter dehalogenans KW - periplasm KW - Signal transduction KW - A 01400:Soil Microbes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1780511945?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologya&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=MicrobiologyOpen&rft.atitle=Analysis+of+periplasmic+sensor+domains+from+Anaeromyxobacter+dehalogenans+2CP-C%3A+Structure+of+one+sensor+domain+from+a+histidine+kinase+and+another+from+a+chemotaxis+protein&rft.au=Pokkuluri%2C+PRaj%3BDwulit-Smith%2C+Jeff%3BDuke%2C+Norma+E%3BWilton%2C+Rosemarie%3BMack%2C+Jamey+C%3BBearden%2C+Jessica%3BRakowski%2C+Ella%3BBabnigg%2C+Gyorgy%3BSzurmant%2C+Hendrik%3BJoachimiak%2C+Andrzej%3BSchiffer%2C+Marianne&rft.aulast=Pokkuluri&rft.aufirst=PRaj&rft.date=2013-10-01&rft.volume=2&rft.issue=5&rft.spage=766&rft.isbn=&rft.btitle=&rft.title=MicrobiologyOpen&rft.issn=20458827&rft_id=info:doi/10.1002%2Fmbo3.112 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-04-01 N1 - Last updated - 2016-05-13 N1 - SubjectsTermNotLitGenreText - Histidine kinase; Genomes; solute-binding protein; Dechlorination; Adaptations; Bioremediation; 6-Phosphogluconolactonase; X-ray diffraction; Chemotaxis; Acetic acid; Monocyte chemoattractant protein; Sediments; Soil; periplasm; Signal transduction; Anaeromyxobacter dehalogenans DO - http://dx.doi.org/10.1002/mbo3.112 ER - TY - JOUR T1 - Correlation properties of collective motion in bacterial suspensions AN - 1618152954; 20803201 AB - The study of collective motion in bacterial suspensions has been of significant recent interest. To better understand the non-trivial spatio-temporal correlations emerging in the course of collective swimming in suspensions of motile bacteria, a simple model is employed: a bacterium is represented as a force dipole with size, through the use of a short-range repelling potential, and shape. The model emphasizes two fundamental mechanisms: dipolar hydrodynamic interactions and short-range bacterial collisions. Using direct particle simulations validated by a dedicated experiment, we show that changing the swimming speed or concentration alters the time scale of sustained collective motion, consistent with experiment. Also, the correlation length in the collective state is almost constant as concentration and swimming speed change even though increasing each greatly increases the input of energy to the system. We demonstrate that the particle shape is critical for the onset of collective effects. In addition, new experimental results are presented illustrating the onset of collective motion with an ultrasound technique. This work exemplifies the delicate balance between various physical mechanisms governing collective motion in bacterial suspensions and provides important insights into its mesoscopic nature. JF - New Journal of Physics AU - Ryan, Shawn D AU - Sokolov, Andrey AU - Berlyand, Leonid AU - Aranson, Igor S AD - Department of Mathematics, Pennsylvania State University, University Park, PA 16802, USA; Materials Science Division, Argonne National Laboratory, 9700 S Cass Avenue, Argonne, IL 60439, USA, ryan@math.psu.edu Y1 - 2013/10// PY - 2013 DA - Oct 2013 SP - 1 EP - 18 PB - IOP Press VL - 15 SN - 1367-2630, 1367-2630 KW - Microbiology Abstracts B: Bacteriology KW - Bacteria KW - Swimming KW - Hydrodynamics KW - Energy KW - Ultrasound KW - Models KW - J 02490:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618152954?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=New+Journal+of+Physics&rft.atitle=Correlation+properties+of+collective+motion+in+bacterial+suspensions&rft.au=Ryan%2C+Shawn+D%3BSokolov%2C+Andrey%3BBerlyand%2C+Leonid%3BAranson%2C+Igor+S&rft.aulast=Kafle&rft.aufirst=D&rft.date=2013-07-01&rft.volume=118&rft.issue=13&rft.spage=7293&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2Fjgrd.50536 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Swimming; Hydrodynamics; Energy; Ultrasound; Models; Bacteria DO - http://dx.doi.org/10.1088/1367-2630/15/10/105021 ER - TY - JOUR T1 - Adenomatous Polyps Are Driven by Microbe-Instigated Focal Inflammation and Are Controlled by IL-10-Producing T Cells AN - 1551630109; 20323542 AB - IL-10 provided by T cells in the colon is critical to control bacterial-driven inflammation and polyp growth, providing a rationale for this cytokine as a candidate target for immunotherapy in colon cancer. JF - Cancer Research AU - Dennis, Kristen L AU - Wang, Yunwei AU - Blatner, Nichole R AU - Wang, Shuya AU - Saadalla, Abdulrahman AU - Trudeau, Erin AU - Roers, Axel AU - Weaver, Casey T AU - Lee, James J AU - Gilbert, Jack A AU - Chang, Eugene B AU - Khazaie, Khashayarsha AD - Robert H. Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine; Department of Medicine, Knapp Center for Biomedical Discovery; Department of Ecology and Evolution, University of Chicago, Chicago; Argonne National Laboratory, Argonne, Illinois; Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama; Department of Biochemistry and Molecular Biology, Mayo Clinic Scottsdale, Scottsdale, Arkansas; and Institute for Immunology, Technical University Dresden, Dresden, Germany Y1 - 2013/10/01/ PY - 2013 DA - 2013 Oct 01 SP - 5905 EP - 5913 PB - American Association for Cancer Research, 615 Chestnut St., 17th Floor Philadelphia PA 19106-4404 United States VL - 73 IS - 19 SN - 0008-5472, 0008-5472 KW - Microbiology Abstracts B: Bacteriology; Immunology Abstracts KW - Immunotherapy KW - Lymphocytes T KW - Polyps KW - Colon cancer KW - Interleukin 10 KW - Inflammation KW - J 02320:Cell Biology KW - F 06915:Cancer Immunology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1551630109?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Cancer+Research&rft.atitle=Adenomatous+Polyps+Are+Driven+by+Microbe-Instigated+Focal+Inflammation+and+Are+Controlled+by+IL-10-Producing+T+Cells&rft.au=Dennis%2C+Kristen+L%3BWang%2C+Yunwei%3BBlatner%2C+Nichole+R%3BWang%2C+Shuya%3BSaadalla%2C+Abdulrahman%3BTrudeau%2C+Erin%3BRoers%2C+Axel%3BWeaver%2C+Casey+T%3BLee%2C+James+J%3BGilbert%2C+Jack+A%3BChang%2C+Eugene+B%3BKhazaie%2C+Khashayarsha&rft.aulast=Dennis&rft.aufirst=Kristen&rft.date=2013-10-01&rft.volume=73&rft.issue=19&rft.spage=5905&rft.isbn=&rft.btitle=&rft.title=Cancer+Research&rft.issn=00085472&rft_id=info:doi/10.1158%2F0008-5472.CAN-13-1511 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Last updated - 2014-10-02 N1 - SubjectsTermNotLitGenreText - Immunotherapy; Lymphocytes T; Polyps; Colon cancer; Interleukin 10; Inflammation DO - http://dx.doi.org/10.1158/0008-5472.CAN-13-1511 ER - TY - JOUR T1 - Rapid and Accurate Analysis of an X-Ray Fluorescence Microscopy Data Set through Gaussian Mixture-Based Soft Clustering Methods AN - 1520372883; 18889900 AB - X-ray fluorescence (XRF) microscopy is an important tool for studying trace metals in biology, enabling simultaneous detection of multiple elements of interest and allowing quantification of metals in organelles without the need for subcellular fractionation. Currently, analysis of XRF images is often done using manually defined regions of interest (ROIs). However, since advances in synchrotron instrumentation have enabled the collection of very large data sets encompassing hundreds of cells, manual approaches are becoming increasingly impractical. We describe here the use of soft clustering to identify cell ROIs based on elemental contents, using data collected over a sample of the malaria parasite Plasmodium falciparum as a test case. Soft clustering was able to successfully classify regions in infected erythrocytes as "parasite," "food vacuole," "host," or "background." In contrast, hard clustering using the k-means algorithm was found to have difficulty in distinguishing cells from background. While initial tests showed convergence on two or three distinct solutions in 60% of the cells studied, subsequent modifications to the clustering routine improved results to yield 100% consistency in image segmentation. Data extracted using soft cluster ROIs were found to be as accurate as data extracted using manually defined ROIs, and analysis time was considerably improved. JF - Microscopy and Microanalysis AU - Ward, Jesse AU - Marvin, Rebecca AU - O'Halloran, Thomas AU - Jacobsen, Chris AU - Vogt, Stefan AD - X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA, svogt@aps.anl.gov Y1 - 2013/10// PY - 2013 DA - October 2013 SP - 1281 EP - 1289 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 19 IS - 5 SN - 1431-9276, 1431-9276 KW - ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality KW - Parasites KW - X-rays KW - Mathematical models KW - Erythrocytes KW - Plasmodium falciparum KW - Hosts KW - Manuals KW - Trace metals KW - Public health KW - Fluorescence microscopy KW - Q1 08484:Species interactions: parasites and diseases KW - Q5 08524:Public health, medicines, dangerous organisms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520372883?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Microscopy+and+Microanalysis&rft.atitle=Rapid+and+Accurate+Analysis+of+an+X-Ray+Fluorescence+Microscopy+Data+Set+through+Gaussian+Mixture-Based+Soft+Clustering+Methods&rft.au=Ward%2C+Jesse%3BMarvin%2C+Rebecca%3BO%27Halloran%2C+Thomas%3BJacobsen%2C+Chris%3BVogt%2C+Stefan&rft.aulast=Ward&rft.aufirst=Jesse&rft.date=2013-10-01&rft.volume=19&rft.issue=5&rft.spage=1281&rft.isbn=&rft.btitle=&rft.title=Microscopy+and+Microanalysis&rft.issn=14319276&rft_id=info:doi/10.1017%2FS1431927613012737 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-04-01 N1 - Number of references - 22 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Parasites; X-rays; Mathematical models; Erythrocytes; Hosts; Manuals; Trace metals; Fluorescence microscopy; Public health; Plasmodium falciparum DO - http://dx.doi.org/10.1017/S1431927613012737 ER - TY - JOUR T1 - Structural and functional characterization of solute binding proteins for aromatic compounds derived from lignin: p-Coumaric acid and related aromatic acids AN - 1439234576; 18574969 AB - Lignin comprises 15-25% of plant biomass and represents a major environmental carbon source for utilization by soil microorganisms. Access to this energy resource requires the action of fungal and bacterial enzymes to break down the lignin polymer into a complex assortment of aromatic compounds that can be transported into the cells. To improve our understanding of the utilization of lignin by microorganisms, we characterized the molecular properties of solute binding proteins of ATP-binding cassette transporter proteins that interact with these compounds. A combination of functional screens and structural studies characterized the binding specificity of the solute binding proteins for aromatic compounds derived from lignin such as p-coumarate, 3-phenylpropionic acid and compounds with more complex ring substitutions. A ligand screen based on thermal stabilization identified several binding protein clusters that exhibit preferences based on the size or number of aromatic ring substituents. Multiple X-ray crystal structures of protein-ligand complexes for these clusters identified the molecular basis of the binding specificity for the lignin-derived aromatic compounds. The screens and structural data provide new functional assignments for these solute-binding proteins which can be used to infer their transport specificity. This knowledge of the functional roles and molecular binding specificity of these proteins will support the identification of the specific enzymes and regulatory proteins of peripheral pathways that funnel these compounds to central metabolic pathways and will improve the predictive power of sequence-based functional annotation methods for this family of proteins.Proteins 2013; 81:1709-1726. [copy 2013 Wiley Periodicals, Inc. JF - Proteins: Structure, Function and Bioinformatics AU - Tan, Kemin AU - Chang, Changsoo AU - Cuff, Marianne AU - Osipiuk, Jerzy AU - Landorf, Elizabeth AU - Mack, Jamey C AU - Zerbs, Sarah AU - Joachimiak, Andrzej AU - Collart, Frank R AD - Biosciences Division, Argonne National Laboratory, Lemont, Illinois, 60439. Y1 - 2013/10// PY - 2013 DA - Oct 2013 SP - 1709 EP - 1726 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030 United States VL - 81 IS - 10 SN - 0887-3585, 0887-3585 KW - Biotechnology and Bioengineering Abstracts KW - solute-binding protein KW - Data processing KW - Enzymes KW - Carbon sources KW - Biomass KW - Soil microorganisms KW - Protein structure KW - Solutes KW - Aromatic compounds KW - regulatory proteins KW - Structure-function relationships KW - Energy resources KW - Ionizing radiation KW - Lignin KW - Metabolic pathways KW - Microorganisms KW - Crystal structure KW - Bioinformatics KW - Aromatics KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1439234576?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proteins%3A+Structure%2C+Function+and+Bioinformatics&rft.atitle=Structural+and+functional+characterization+of+solute+binding+proteins+for+aromatic+compounds+derived+from+lignin%3A+p-Coumaric+acid+and+related+aromatic+acids&rft.au=Tan%2C+Kemin%3BChang%2C+Changsoo%3BCuff%2C+Marianne%3BOsipiuk%2C+Jerzy%3BLandorf%2C+Elizabeth%3BMack%2C+Jamey+C%3BZerbs%2C+Sarah%3BJoachimiak%2C+Andrzej%3BCollart%2C+Frank+R&rft.aulast=Tan&rft.aufirst=Kemin&rft.date=2013-10-01&rft.volume=81&rft.issue=10&rft.spage=1709&rft.isbn=&rft.btitle=&rft.title=Proteins%3A+Structure%2C+Function+and+Bioinformatics&rft.issn=08873585&rft_id=info:doi/10.1002%2Fprot.24305 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-10-01 N1 - Last updated - 2013-10-04 N1 - SubjectsTermNotLitGenreText - solute-binding protein; Data processing; Enzymes; Carbon sources; Biomass; Soil microorganisms; Protein structure; Solutes; Aromatic compounds; regulatory proteins; Structure-function relationships; Ionizing radiation; Energy resources; Lignin; Crystal structure; Microorganisms; Metabolic pathways; Bioinformatics; Aromatics DO - http://dx.doi.org/10.1002/prot.24305 ER - TY - JOUR T1 - Robustness of Designs for Drinking-Water Contamination Warning Systems under Uncertain Conditions AN - 1855082270; PQ0003945887 AB - Contamination warning systems (CWSs) for drinking-water distribution systems (WDSs) are used to reduce the potential adverse effects of intentional or accidental WDS contamination. They are designed on the basis of possible contamination events but often address only a narrow range in event conditions. The influence on their performance of conditions different from those assumed in the design generally is not considered. Using results from simulations done with network models for 11 actual WDSs, it is shown here that CWS performance for high-consequence events can degrade substantially (by an order of magnitude) when conditions such as contaminant toxicity and injection time differ from those used in the design. Generally, increasing the number of sensors does not reduce this sensitivity to changed conditions. The significance of uncertain conditions varies substantially among WDSs. As a consequence of performance changes that occur when conditions change, mean-case designs generally outperform worst-case designs when the objective is to minimize worst-case adverse effects over a range of conditions. The results of this work can be used to implement more robust designs for CWSs, while reducing computational requirements. JF - Journal of Water Resources Planning and Management AU - Davis, Michael J AU - Janke, Robert AU - Phillips, Cynthia A AD - Argonne National Laboratory, Environmental Science Division, 9700 South Cass Avenue, Argonne, IL 60439. Y1 - 2013/09/21/ PY - 2013 DA - 2013 Sep 21 PB - American Society of Civil Engineers, 1801 Alexander Bell Drive Reston VA 20191-4400 United States SN - 0733-9496, 0733-9496 KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts; Aqualine Abstracts KW - Contamination KW - Sensors KW - Water resources KW - Drinking Water KW - Water resources planning KW - Warning Systems KW - Modelling KW - Sensitivity KW - Pollution detection KW - Simulation Analysis KW - Simulation KW - Toxicity KW - Warning systems KW - Design KW - Numerical simulations KW - Water management KW - Water Pollution Effects KW - Water Requirements KW - Drinking water KW - Side effects KW - Water Resources KW - AQ 00001:Water Resources and Supplies KW - Q2 09144:Regional studies, expeditions and data reports KW - M2 556.18:Water Management (556.18) KW - SW 3060:Water treatment and distribution KW - P 6000:TOXICOLOGY AND HEALTH KW - ENA 02:Toxicology & Environmental Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1855082270?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Water+Resources+Planning+and+Management&rft.atitle=Robustness+of+Designs+for+Drinking-Water+Contamination+Warning+Systems+under+Uncertain+Conditions&rft.au=Davis%2C+Michael+J%3BJanke%2C+Robert%3BPhillips%2C+Cynthia+A&rft.aulast=Davis&rft.aufirst=Michael&rft.date=2013-09-21&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Journal+of+Water+Resources+Planning+and+Management&rft.issn=07339496&rft_id=info:doi/10.1061%2F%28ASCE%29WR.1943-5452.0000408 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-01-01 N1 - Last updated - 2017-02-15 N1 - SubjectsTermNotLitGenreText - Pollution detection; Sensors; Contamination; Water management; Water resources; Warning systems; Modelling; Numerical simulations; Water resources planning; Sensitivity; Simulation; Toxicity; Drinking water; Side effects; Design; Drinking Water; Simulation Analysis; Water Pollution Effects; Water Requirements; Warning Systems; Water Resources DO - http://dx.doi.org/10.1061/(ASCE)WR.1943-5452.0000408 ER - TY - JOUR T1 - Large-scale branch contingency analysis through master/slave parallel computing AN - 1732836845; PQ0002203872 AB - Contingency analysis (CA) requires fast execution time for real-time power system operations. Because CA problems can naturally be divided into separate subtasks, parallel computing helps to speed up the computation time. This paper proposes a master/slave parallel computing architecture and studies the computation of CA in a large-scale power system through high performance computing, adopting a message passing interface for implementation. In particular, although the execution time of CA varies, there is a tradeoff between having an imbalanced workload and "paying" a synchronization penalty for parallel computing: either factor blocks the progress of scalability. The proposed layered dynamic scheduling method is effective to tackle the challenge of high synchronization cost and workload imbalance and have the potential to further scale for the N - 2 contingency analysis. JF - Journal of Modern Power Systems and Clean Energy AU - Yang, Xi AU - Liu, Cong AU - Wang, Jianhui AD - Decision and Information Sciences Division of Argonne National Laboratory, Argonne, IL, 60439, USA, jianhui.wang@anl.gov PY - 2013 SP - 159 EP - 166 PB - Springer Science & Business Media, Berlin/Heidelberg VL - 1 IS - 2 SN - 2196-5625, 2196-5625 KW - Sustainability Science Abstracts KW - Energy KW - Working conditions KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1732836845?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Modern+Power+Systems+and+Clean+Energy&rft.atitle=Large-scale+branch+contingency+analysis+through+master%2Fslave+parallel+computing&rft.au=Yang%2C+Xi%3BLiu%2C+Cong%3BWang%2C+Jianhui&rft.aulast=Yang&rft.aufirst=Xi&rft.date=2013-09-01&rft.volume=1&rft.issue=2&rft.spage=159&rft.isbn=&rft.btitle=&rft.title=Journal+of+Modern+Power+Systems+and+Clean+Energy&rft.issn=21965625&rft_id=info:doi/10.1007%2Fs40565-013-0024-0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Number of references - 18 N1 - Last updated - 2015-12-09 N1 - SubjectsTermNotLitGenreText - Energy; Working conditions DO - http://dx.doi.org/10.1007/s40565-013-0024-0 ER - TY - JOUR T1 - The water footprint of biofuel produced from forest wood residue via a mixed alcohol gasification process AN - 1730064657; PQ0001831669 AB - Forest residue has been proposed as a feasible candidate for cellulosic biofuels. However, the number of studies assessing its water use remains limited. This work aims to analyze the impacts of forest-based biofuel on water resources and quality by using a water footprint approach. A method established here is tailored to the production system, which includes softwood, hardwood, and short-rotation woody crops. The method is then applied to selected areas in the southeastern region of the United States to quantify the county-level water footprint of the biofuel produced via a mixed alcohol gasification process, under several logistic systems, and at various refinery scales. The results indicate that the blue water sourced from surface or groundwater is minimal, at 2.4 liters per liter of biofuel (l/l). The regional-average green water (rainfall) footprint falls between 400 and 443 l/l. The biofuel pathway appears to have a low nitrogen grey water footprint averaging 25 l/l at the regional level, indicating minimal impacts on water quality. Feedstock mix plays a key role in determining the magnitude and the spatial distribution of the water footprint in these regions. Compared with other potential feedstock, forest wood residue shows promise with its low blue and grey water footprint. JF - Environmental Research Letters AU - Chiu, Yi-Wen AU - Wu, May AD - Energy Systems Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA Y1 - 2013/09// PY - 2013 DA - September 2013 SP - 1 EP - 8 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 8 IS - 3 SN - 1748-9326, 1748-9326 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - biofuels KW - forest biomass KW - thinning residue KW - logging residue KW - short-rotation woody crop KW - water footprint KW - Residues KW - Footprints KW - Alcohols KW - Fuels KW - Gasification KW - Wood KW - Forests KW - Water quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1730064657?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Research+Letters&rft.atitle=The+water+footprint+of+biofuel+produced+from+forest+wood+residue+via+a+mixed+alcohol+gasification+process&rft.au=Chiu%2C+Yi-Wen%3BWu%2C+May&rft.aulast=Chiu&rft.aufirst=Yi-Wen&rft.date=2013-09-01&rft.volume=8&rft.issue=3&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=17489326&rft_id=info:doi/10.1088%2F1748-9326%2F8%2F3%2F035015 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Last updated - 2016-08-08 DO - http://dx.doi.org/10.1088/1748-9326/8/3/035015 ER - TY - JOUR T1 - Empirical estimates to reduce modeling uncertainties of soil organic carbon in permafrost regions; a review of recent progress and remaining challenges AN - 1492588170; 2014-005864 AB - The vast amount of organic carbon (OC) stored in soils of the northern circumpolar permafrost region is a potentially vulnerable component of the global carbon cycle. However, estimates of the quantity, decomposability, and combustibility of OC contained in permafrost-region soils remain highly uncertain, thereby limiting our ability to predict the release of greenhouse gases due to permafrost thawing. Substantial differences exist between empirical and modeling estimates of the quantity and distribution of permafrost-region soil OC, which contribute to large uncertainties in predictions of carbon-climate feedbacks under future warming. Here, we identify research challenges that constrain current assessments of the distribution and potential decomposability of soil OC stocks in the northern permafrost region and suggest priorities for future empirical and modeling studies to address these challenges. Copyright 2013 IOP Publishing Ltd JF - Environmental Research Letters AU - Mishra, U AU - Jastrow, J D AU - Matamala, R AU - Hugelius, G AU - Koven, C D AU - Harden, J W AU - Ping, C L AU - Michaelson, G J AU - Fan, Z AU - Miller, R M AU - McGuire, A D AU - Tarnocai, C AU - Kuhry, P AU - Riley, W J AU - Schaefer, K AU - Schuur, E A G AU - Jorgenson, M T AU - Hinzman, L D Y1 - 2013/09// PY - 2013 DA - September 2013 EP - Paper No. 035020 PB - Institute of Physics and IOP Publishing, Bristol VL - 8 IS - 3 KW - soils KW - soil profiles KW - permafrost KW - prediction KW - global change KW - thawing KW - geochemical cycle KW - models KW - feedback KW - cryoturbation KW - future KW - carbon KW - greenhouse gases KW - carbon cycle KW - organic carbon KW - uncertainty KW - climate KW - global warming KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492588170?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Research+Letters&rft.atitle=Empirical+estimates+to+reduce+modeling+uncertainties+of+soil+organic+carbon+in+permafrost+regions%3B+a+review+of+recent+progress+and+remaining+challenges&rft.au=Mishra%2C+U%3BJastrow%2C+J+D%3BMatamala%2C+R%3BHugelius%2C+G%3BKoven%2C+C+D%3BHarden%2C+J+W%3BPing%2C+C+L%3BMichaelson%2C+G+J%3BFan%2C+Z%3BMiller%2C+R+M%3BMcGuire%2C+A+D%3BTarnocai%2C+C%3BKuhry%2C+P%3BRiley%2C+W+J%3BSchaefer%2C+K%3BSchuur%2C+E+A+G%3BJorgenson%2C+M+T%3BHinzman%2C+L+D&rft.aulast=Mishra&rft.aufirst=U&rft.date=2013-09-01&rft.volume=8&rft.issue=3&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=1748-9326&rft_id=info:doi/10.1088%2F1748-9326%2F8%2F3%2F035020 L2 - http://iopscience.iop.org/1748-9326 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 70 N1 - Document feature - illus. incl. sketch maps N1 - Last updated - 2014-01-30 N1 - SubjectsTermNotLitGenreText - carbon; carbon cycle; climate; cryoturbation; feedback; future; geochemical cycle; global change; global warming; greenhouse gases; models; organic carbon; permafrost; prediction; soil profiles; soils; thawing; uncertainty DO - http://dx.doi.org/10.1088/1748-9326/8/3/035020 ER - TY - JOUR T1 - A momentum source model for wire-wrapped rod bundles-Concept, validation, and application AN - 1464603304; 18783586 AB - Large uncertainties still exist in the tteatment of wire-spacers and drag models for momentum transfer in current lumped parameter models. To improve the hydraulic modeling of wire-wrap spacers in a rod bundle, a three-dimensional momentum source model (MSM) has been developed to model the anisotropic flow without the need to resolve the geometric details of the wire-wraps. The MSM is examined for 7-pin and 37-pin bundles steady-state simulations using the commercial CFD code STAR-CCM+. The calculated steady-state inter-subchannel cross flow velocities match very well in comparisons between bare bundles with the MSM applied and the wire-wrapped bundles with explicit geometry. The validity of the model is further verified by mesh and parameter sensitivity studies. Furthermore, the MSM is applied to a 61 -pin EBR-Il experimental subassembly for both steady state and PLOF transient simulations. Reasonably accurate predictions of temperature, pressure, and fluid flow velocities have been achieved using the MSM for both steady-state and transient conditions. Significant computing resources are saved with the MSM since it can be used on a much coarser computational mesh. JF - Nuclear Engineering and Design AU - Hu, Rui AU - Fanning, Thomas H AD - Nuclear Engineering Division, Argonne National Laboratory. 9700 South Cass Avenue. Argonne. IL 60439. USA rhu@anl.gov Y1 - 2013/09// PY - 2013 DA - Sep 2013 SP - 371 EP - 389 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 262 SN - 0029-5493, 0029-5493 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Finite element method KW - Computational fluid dynamics KW - Computation KW - Mathematical models KW - Computer simulation KW - Bundles KW - Bundling KW - Fluid flow UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1464603304?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Engineering+and+Design&rft.atitle=A+momentum+source+model+for+wire-wrapped+rod+bundles-Concept%2C+validation%2C+and+application&rft.au=Hu%2C+Rui%3BFanning%2C+Thomas+H&rft.aulast=Hu&rft.aufirst=Rui&rft.date=2013-09-01&rft.volume=262&rft.issue=&rft.spage=371&rft.isbn=&rft.btitle=&rft.title=Nuclear+Engineering+and+Design&rft.issn=00295493&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-12-01 N1 - Number of references - 19 N1 - Last updated - 2014-05-06 ER - TY - JOUR T1 - Electrochemical investigation of carbonate-based electrolytes for high voltage lithium-ion cells AN - 1448758355; 18680358 AB - One conventional electrolyte ("Gen 2") for lithium-ion batteries consists of 1.2 M LiPF sub(6) dissolved in ethylene carbonate and ethyl methyl carbonate. A comprehensive investigation of this electrolyte in a high-voltage graphite/LiNi sub(0.5)Mn sub(1.5)O sub(4) (LNMO) cell was carried out to evaluate its voltage stability under various charging conditions. Although the carbonate-based electrolyte was relatively stable when the graphite/LNMO cell was charged to 4.8 V at room temperature, the introduction of a constant-voltage charging step aggravated the oxidative decomposition of the electrolyte. Further increase in the cell charging voltage to 4.9 V or above and further increase in the temperature to 55 degree C caused cell performance to deteriorate dramatically. JF - Journal of Power Sources AU - Hu, L AU - Zhang, Z AU - Amine, K AD - Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA, zzhang@anl.gov Y1 - 2013/08/15/ PY - 2013 DA - 2013 Aug 15 SP - 175 EP - 180 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 236 SN - 0378-7753, 0378-7753 KW - Environment Abstracts KW - Electrolytes KW - Batteries KW - Temperature KW - Electrochemistry KW - Decomposition KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1448758355?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=Electrochemical+investigation+of+carbonate-based+electrolytes+for+high+voltage+lithium-ion+cells&rft.au=Hu%2C+L%3BZhang%2C+Z%3BAmine%2C+K&rft.aulast=Hu&rft.aufirst=L&rft.date=2013-08-15&rft.volume=236&rft.issue=&rft.spage=175&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Electrolytes; Batteries; Temperature; Electrochemistry; Decomposition ER - TY - CPAPER T1 - Generating a continental scale, systems model to explore scalar interactions within and between NEON terrestrial observation sites T2 - 98th Annual Meeting of the Ecological Society of America (ESA 2013) AN - 1493789314; 6256864 JF - 98th Annual Meeting of the Ecological Society of America (ESA 2013) AU - Gilbert, Jack AU - Larsen, Peter AU - Parnel, Jacob AU - Fierer, Noah AU - Knight, Rob AU - Jansson, Janet AU - Drewniak, Beth AU - Jacob, Rob Y1 - 2013/08/04/ PY - 2013 DA - 2013 Aug 04 KW - Neon UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1493789314?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=98th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2013%29&rft.atitle=Generating+a+continental+scale%2C+systems+model+to+explore+scalar+interactions+within+and+between+NEON+terrestrial+observation+sites&rft.au=Gilbert%2C+Jack%3BLarsen%2C+Peter%3BParnel%2C+Jacob%3BFierer%2C+Noah%3BKnight%2C+Rob%3BJansson%2C+Janet%3BDrewniak%2C+Beth%3BJacob%2C+Rob&rft.aulast=Gilbert&rft.aufirst=Jack&rft.date=2013-08-04&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=98th+Annual+Meeting+of+the+Ecological+Society+of+America+%28ESA+2013%29&rft.issn=&rft_id=info:doi/ L2 - http://eco.confex.com/eco/2013/webprogram/meeting.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-12-31 N1 - Last updated - 2014-02-10 ER - TY - JOUR T1 - An adoption scenario for carbon capture in pulverized coal power plants in the USA AN - 1492628864; 18816082 AB - In this paper we use the Electricity Supply and Investment Model (ESIM) power system model to examine the energy market effects of incentivized adoption of carbon capture and storage (CCS), with a primary focus on retrofitting existing pulverized coal plants. In the presence of a 'medium' carbon charge and least-cost dispatch, units with CCS are operated with higher utilization rates than fossil energy plants without carbon capture, hence lowering CO sub(2) emissions. This path helps to lower the capital outlays that will be necessary to make a transition to a full portfolio of advanced low-carbon technologies. Required research, development and demonstration can be financed by a portion of the carbon charge revenue. JF - Greenhouse Gases: Science and Technology AU - Hanson, Donald AU - Schmalzer, David AD - Argonne National Laboratory, Lemont, IL, USA. Y1 - 2013/08// PY - 2013 DA - Aug 2013 SP - 303 EP - 308 PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 3 IS - 4 SN - 2152-3878, 2152-3878 KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts KW - Carbon dioxide KW - USA KW - Coal KW - Carbon dioxide emissions KW - ENA 03:Energy KW - M2 551.510.3/.4:Physical Properties/Composition (551.510.3/.4) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492628864?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Greenhouse+Gases%3A+Science+and+Technology&rft.atitle=An+adoption+scenario+for+carbon+capture+in+pulverized+coal+power+plants+in+the+USA&rft.au=Hanson%2C+Donald%3BSchmalzer%2C+David&rft.aulast=Hanson&rft.aufirst=Donald&rft.date=2013-08-01&rft.volume=3&rft.issue=4&rft.spage=303&rft.isbn=&rft.btitle=&rft.title=Greenhouse+Gases%3A+Science+and+Technology&rft.issn=21523878&rft_id=info:doi/10.1002%2Fghg.1359 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-02-11 N1 - SubjectsTermNotLitGenreText - Carbon dioxide emissions; Coal; USA DO - http://dx.doi.org/10.1002/ghg.1359 ER - TY - JOUR T1 - Metastable high pressure transformations of orthoferrosilite Fs (sub 82) AN - 1492589002; 2014-007366 AB - High-pressure single-crystal X-ray diffraction experiments with natural ferrosilite Fs (sub 82) (Fe (super 2+) (sub 0.82) Mg (sub 0.16) Al (sub 0.01) Ca (sub 0.01) )(Si (sub 0.99) Al (sub 0.01) )O (sub 3) orthopyroxene (opx) reveal that at ambient temperature the sample does not transform to the clinopyroxene (cpx) structure, as reported earlier for a synthetic Fs (sub 100) end-member (Hugh-Jones et al., 1996), but instead undergoes a series of two polymorphic transitions, first above 10.1(1)GPa, to the monoclinic P2 (sub 1) /c phase beta -opx (distinctly different from both P2 (sub 1) /c and C2/c cpx), also observed in natural enstatite (Zhang et al., 2012), and then, above 12.3(1)GPa to a high-pressure orthorhombic Pbca phase gamma -opx, predicted for MgSiO (sub 3) by atomistic simulations (Jahn, 2008). The structures of phases alpha , beta and gamma have been determined from the single-crystal data at pressures of 2.3(1), 11.1(1), and 14.6(1)GPa, respectively. The two new high-pressure transitions, very similar in their character to the P2 (sub 1) /c-C2/c transformation of cpx, make opx approximately as dense as cpx above 12.3(1)GPa and significantly change the elastic anisotropy of the crystal, with the [100] direction becoming almost twice as stiff as in the ambient alpha -opx phase. Both transformations involve mainly tetrahedral rotation, are reversible and are not expected to leave microstructural evidence that could be used as a geobarometric proxy. The high Fe (super 2+) content in Fs (sub 82) shifts the alpha -beta transition to slightly lower pressure, compared to MgSiO (sub 3) , and has a very dramatic effect on reducing the (meta) stability range of the beta -phase. Abstract Copyright (2013) Elsevier, B.V. JF - Physics of the Earth and Planetary Interiors AU - Dera, Przemyslaw AU - Finkelstein, Gregory J AU - Duffy, Thomas S AU - Downs, Robert T AU - Meng, Yue AU - Prakapenka, Vitali AU - Tkachev, Sergey Y1 - 2013/08// PY - 2013 DA - August 2013 SP - 15 EP - 21 PB - Elsevier, Amsterdam VL - 221 SN - 0031-9201, 0031-9201 KW - silicates KW - geologic barometry KW - X-ray diffraction data KW - mantle KW - phase transitions KW - crystal structure KW - pyroxene group KW - equations of state KW - enstatite KW - P-T conditions KW - chain silicates KW - upper mantle KW - experimental studies KW - elasticity KW - pressure KW - lithosphere KW - high pressure KW - molecular structure KW - single-crystal method KW - volume KW - synchrotrons KW - orthopyroxene KW - anvil cells KW - transformations KW - anisotropy KW - ferrosilite KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492589002?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Physics+of+the+Earth+and+Planetary+Interiors&rft.atitle=Metastable+high+pressure+transformations+of+orthoferrosilite+Fs+%28sub+82%29&rft.au=Dera%2C+Przemyslaw%3BFinkelstein%2C+Gregory+J%3BDuffy%2C+Thomas+S%3BDowns%2C+Robert+T%3BMeng%2C+Yue%3BPrakapenka%2C+Vitali%3BTkachev%2C+Sergey&rft.aulast=Dera&rft.aufirst=Przemyslaw&rft.date=2013-08-01&rft.volume=221&rft.issue=&rft.spage=15&rft.isbn=&rft.btitle=&rft.title=Physics+of+the+Earth+and+Planetary+Interiors&rft.issn=00319201&rft_id=info:doi/10.1016%2Fj.pepi.2013.06.006 L2 - http://www.sciencedirect.com/science/journal/00319201 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 60 N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-01-30 N1 - CODEN - PEPIAM N1 - SubjectsTermNotLitGenreText - anisotropy; anvil cells; chain silicates; crystal structure; elasticity; enstatite; equations of state; experimental studies; ferrosilite; geologic barometry; high pressure; lithosphere; mantle; molecular structure; orthopyroxene; P-T conditions; phase transitions; pressure; pyroxene group; silicates; single-crystal method; synchrotrons; transformations; upper mantle; volume; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.pepi.2013.06.006 ER - TY - JOUR T1 - Immobilization of P by oxidation of Fe(II) ions leading to nanoparticle formation and aggregation AN - 1492588967; 2014-007334 AB - Ferrous iron was oxidized at pH 6.0 in the presence of dissolved oxygen and increasing concentrations of phosphate. The resulting precipitates were characterized by TEM, SEM, XRD, IR spectroscopy, Mossbauer spectroscopy, EXAFS spectroscopy, and chemical analyses. The kinetics and the stoichiometry of oxidation were also determined. Chemical analyses revealed that all the P introduced was immobilized up to an introduced P/Fe molar ratio of 0.6-0.7. In the presence of excess phosphate, the maximum P/Fe ratio of the precipitates was found to be equal to about 0.86. Incorporation of phosphate hindered the sorption of dissolved carbonates, but favored the immobilization of monovalent cations such as Na or K. The number of OH (super -) ions per Fe atom introduced during the reaction decreased from 2 in the absence of P to about 1.5+ or -0.1 in the presence of excess phosphate. In all cases, no residual Fe(II) could be detected. In the absence of phosphate, the samples were composed of poorly crystallized ferrihydrite, lepidocrocite and goethite nanoparticles. Even just a small amount of phosphate (P/Fe=0.02) was sufficient to effectively restrict the formation of goethite. In contrast, the formation of lepidocrocite was detected by XRD for P/Fe ratios as high as 0.1. At higher P/Fe ratios, only non-crystalline particles were detected. For 0.10.5, a new category of particles with characteristic length scales larger than 10 nm appeared and became prominent as P/Fe increased. The transition was accompanied by a change in color of the suspension, from dark red to light yellow. For an introduced P/Fe ratio larger than 1, only the larger particles remained. As the introduced P/Fe ratio increased further, the incorporated P/Fe ratio increased only slightly. In contrast the size of the particles increased significantly, reaching a size larger than 50 nm in the presence of a large excess of PO (sub 4) (super 3-) . The kinetics of oxidation and hydrolysis were shown to obey a typical autocatalytic process in the presence as well as in the absence of PO (sub 4) (super 3-) . Abstract Copyright (2013) Elsevier, B.V. JF - Applied Geochemistry AU - Chatellier, Xavier AU - Grybos, Malgorzata AU - Abdelmoula, Mustapha AU - Kemner, Kenneth M AU - Leppard, Gary G AU - Mustin, Christian AU - West, M Marcia AU - Paktunc, Dogan Y1 - 2013/08// PY - 2013 DA - August 2013 SP - 325 EP - 339 PB - Elsevier, Oxford-New York-Beijing VL - 35 SN - 0883-2927, 0883-2927 KW - aggregate KW - X-ray diffraction data KW - amalgamation KW - gas chromatograms KW - hydrolysis KW - ecosystems KW - iron KW - infrared spectra KW - oxides KW - ecology KW - spectra KW - chemical composition KW - water pollution KW - stoichiometry KW - kinetics KW - pH KW - Mossbauer spectra KW - cyanobacteria KW - titration KW - oxidation KW - pollution KW - phosphorus KW - phosphates KW - ferrihydrite KW - TEM data KW - color KW - precipitation KW - metals KW - chromatograms KW - EXAFS data KW - mobilization KW - nanoparticles KW - SEM data KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492588967?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=Immobilization+of+P+by+oxidation+of+Fe%28II%29+ions+leading+to+nanoparticle+formation+and+aggregation&rft.au=Chatellier%2C+Xavier%3BGrybos%2C+Malgorzata%3BAbdelmoula%2C+Mustapha%3BKemner%2C+Kenneth+M%3BLeppard%2C+Gary+G%3BMustin%2C+Christian%3BWest%2C+M+Marcia%3BPaktunc%2C+Dogan&rft.aulast=Chatellier&rft.aufirst=Xavier&rft.date=2013-08-01&rft.volume=35&rft.issue=&rft.spage=325&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/10.1016%2Fj.apgeochem.2013.04.019 L2 - http://www.sciencedirect.com/science/journal/08832927 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2014-01-01 N1 - Number of references - 63 N1 - Document feature - illus. incl. 5 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2014-01-30 N1 - SubjectsTermNotLitGenreText - aggregate; amalgamation; chemical composition; chromatograms; color; cyanobacteria; ecology; ecosystems; EXAFS data; ferrihydrite; gas chromatograms; hydrolysis; infrared spectra; iron; kinetics; metals; mobilization; Mossbauer spectra; nanoparticles; oxidation; oxides; pH; phosphates; phosphorus; pollution; precipitation; SEM data; spectra; stoichiometry; TEM data; titration; water pollution; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.apgeochem.2013.04.019 ER - TY - CPAPER T1 - Bioenergy crops for resilient landscapes: a design case study and field experiences T2 - 68th Annual International Conference of the Soil and Water Conservation Society AN - 1433510308; 6235099 JF - 68th Annual International Conference of the Soil and Water Conservation Society AU - Negri, Maria AU - Gopalakrishnan, Gayathri AU - Bachtold, Terry AU - John, Steve AU - Iutzi, Frederick AU - Liu, Xiaolan Y1 - 2013/07/21/ PY - 2013 DA - 2013 Jul 21 KW - Case studies KW - Landscape KW - Biofuels KW - Crops UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1433510308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=68th+Annual+International+Conference+of+the+Soil+and+Water+Conservation+Society&rft.atitle=Bioenergy+crops+for+resilient+landscapes%3A+a+design+case+study+and+field+experiences&rft.au=Negri%2C+Maria%3BGopalakrishnan%2C+Gayathri%3BBachtold%2C+Terry%3BJohn%2C+Steve%3BIutzi%2C+Frederick%3BLiu%2C+Xiaolan&rft.aulast=Negri&rft.aufirst=Maria&rft.date=2013-07-21&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=68th+Annual+International+Conference+of+the+Soil+and+Water+Conservation+Society&rft.issn=&rft_id=info:doi/ L2 - http://www.swcs.org/documents/filelibrary/13ac/2013_Abstract_Book_A7E9CA4864695.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-08-31 N1 - Last updated - 2013-09-19 ER - TY - JOUR T1 - Micropulse lidar-derived aerosol optical depth climatology at ARM sites worldwide AN - 1677978232; 19803179 AB - This paper focuses on climatology of the vertical distribution of aerosol optical depth (AOD (z)) from micropulse lidar (MPL) observations for climatically different locations worldwide. For this, a large data set obtained by MPL systems operating at 532 nm during the 4 year period 2007-2010 was used to derive vertical profiles of AOD (z) by combining the corresponding AOD data as an input from an independent measurement using nearly colocated multifilter rotating shadowband radiometer (MFRSR) systems at five different U.S. Department of Energy Atmospheric Radiation Measurement (ARM) Program sites-three permanent sites (SGP in north-central Oklahoma, at 36.6 degree N, 97.5 degree W, 320 m; TWP-Darwin in the tropical western Pacific, at 12.4 degree S, 130.9 degree E, 30 m; and NSA at Barrow on the North Slope of Alaska, at 71.3 degree N, 156.6 degree W, 8 m) and two mobile facility sites (GRW at Graciosa Island in the Azores, at 39 degree N, 28 degree W, 15 m; and FKB in the Black Forest of Germany, at 48.5 degree N, 8.4 degree E, 511 m). Therefore, amount of data used in this study is constrained by the availability of the MFRSR data. The MPL raw data were averaged for 30 s in time and 30 m in altitude. The diurnally averaged AOD (z) profiles from 4 years were combined to obtain a multiyear vertical profile of AOD (z) climatology at various ARM sites, including diurnal, day-to-day, and seasonal variabilities. Most aerosols were found to be confined to 0-2 km (approximately the planetary boundary layer region) at all sites; however, all sites exhibited measurable aerosols well above the mixed layer, with different height maxima. The entire data set demonstrates large day-to-day variability at all sites. However, there is no significant diurnal variation in AOD (z) at all sites. Significant interannual variability was observed at the SGP site. Clear seasonal variations in AOD (z) profiles exist for all five sites, but seasonal behavior was distinct. Moreover, the different seasonal variability for the lower level (0 to ~2 km) versus the level above indicates a contribution of different types of air masses from different sources. The lower annual mean AOD (z) values (0.093 plus or minus 0.033 for daytime and 0.093 plus or minus 0.05 for nighttime) observed near the surface at GRW are not unexpected for maritime aerosols (mostly sea salt), and the corresponding higher values at SGP (0.118 plus or minus 0.038 for daytime and 0.11 plus or minus 0.05 for nighttime), FKB (0.124 plus or minus 0.042 for daytime and 0.127 plus or minus 0.047 for nighttime), and TWP (0.13 plus or minus 0.078 for daytime and 0.14 plus or minus 0.073 for nighttime) are usual for continental aerosols. The annual mean AOD (z) values observed near the surface during daytime and nighttime for NSA were 0.1 plus or minus 0.042 and 0.09 plus or minus 0.037, respectively. These results will aid the scientific community in understanding aerosol properties and boundary layer dynamics and in improving the incorporation of aerosol radiative effects into global climate models. Key Points * Different ARM sites have different seasonal behavior in AOD profiles JF - Journal of Geophysical Research: Atmospheres AU - Kafle, D N AU - Coulter, R L AD - Environmental Science Division, Argonne National Laboratory, Argonne, Illinois, USA. Y1 - 2013/07// PY - 2013 DA - July 2013 SP - 7293 EP - 7308 PB - John Wiley & Sons, Ltd., Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 118 IS - 13 SN - 2169-897X, 2169-897X KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Lidar KW - aerosols KW - extinction KW - aerosol optical depth KW - boundary layer KW - ARM program sites KW - Aerosols KW - Daytime KW - Argon oxygen decarburizing KW - Climatology KW - Geophysics KW - Seasonal variations KW - Maxima KW - Azores UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1677978232?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Atmospheres&rft.atitle=Micropulse+lidar-derived+aerosol+optical+depth+climatology+at+ARM+sites+worldwide&rft.au=Kafle%2C+D+N%3BCoulter%2C+R+L&rft.aulast=Kafle&rft.aufirst=D&rft.date=2013-07-01&rft.volume=118&rft.issue=13&rft.spage=7293&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research%3A+Atmospheres&rft.issn=2169897X&rft_id=info:doi/10.1002%2Fjgrd.50536 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-07-01 N1 - Last updated - 2016-06-30 DO - http://dx.doi.org/10.1002/jgrd.50536 ER - TY - JOUR T1 - Constitutive modeling and finite element procedure development for stress analysis of prismatic high temperature gas cooled reactor graphite core components AN - 1671584682; 18783507 AB - High temperature gas cooled reactors, such as prismatic and pebble bed reactors, are increasingly becoming popular because of their inherent safety, high temperature process heat output, and high efficiency in nuclear power generation. In prismatic reactors, hexagonal graphite bricks are used as reflectors and fuel bricks. In the reactor environment, graphite bricks experience high temperature and neutron dose. This leads to dimensional changes (swelling and or shrinkage) of these bricks. Irradiation dimensional changes may affect the structural integrity of the individual bricks as well as of the overall core. The present paper presents a generic procedure for stress analysis of prismatic core graphite components using graphite reflector as an example. The procedure is demonstrated through commercially available ABAQUS finite element software using the option of user material subroutine (UMAT). This paper considers General Atomics Gas Turbine-Modular Helium Reactor (GT-MHR) as a bench mark design to perform the time integrated stress analysis of a typical reflector brick considering realistic geometry, flux distribution and realistic irradiation material properties of transversely isotropic H-451 grade graphite. JF - Nuclear Engineering and Design AU - Mohanty, Subhasish AU - Majumdar, Saurindranath AU - Srinivasan, Makuteswara AD - Argonne National Laboratory, South Cass Avenue, Argonne, IL 60439, United States smohanty@anl.gov Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - 145 EP - 154 PB - Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom VL - 260 SN - 0029-5493, 0029-5493 KW - Mechanical & Transportation Engineering Abstracts (MT); Advanced Polymers Abstracts (EP); Environmental Engineering Abstracts (EN); Composites Industry Abstracts (ED); Engineered Materials Abstracts, Ceramics (EC); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Finite element method KW - Nuclear power generation KW - Nuclear reactors KW - Graphite KW - Bricks KW - Reflectors KW - Nuclear reactor components KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671584682?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=Electrochemical+investigation+of+carbonate-based+electrolytes+for+high+voltage+lithium-ion+cells&rft.au=Hu%2C+L%3BZhang%2C+Z%3BAmine%2C+K&rft.aulast=Hu&rft.aufirst=L&rft.date=2013-08-15&rft.volume=236&rft.issue=&rft.spage=175&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-12-01 N1 - Number of references - 17 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - A high performance separator with improved thermal stability for Li-ion batteries AN - 1611642570; 20716373 AB - A thermally stable separator based on a poly(phenylene oxide)/SiO sub(2) composite is prepared using a dry phase inversion method. The separator endures up to 250 degree C without obvious thermal deformation. A LiNi sub(1/3)Mn sub(1/3)Co sub(1/3)O sub(2)/graphite cell using the composite separator showed excellent cycling performance, especially at high C-rates. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Woo, Jung-Je AU - Zhang, Zhengcheng AU - Dietz Rago, Nancy L AU - Lu, Wenquan AU - Amine, Khalil AD - Chemical Sciences and Engineering Division; Argonne National Laboratory; 9700 S. Cass Ave.; Argonne; Illinois; 60439; USA; +1-630-252-4176; +1-630-252-7868; , zzhang@anl.gov Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - 8538 EP - 8540 PB - Royal Society of Chemistry VL - 1 IS - 30 SN - 2050-7488, 2050-7488 KW - Sustainability Science Abstracts KW - Composite materials KW - Batteries KW - Inversion KW - Energy KW - Sustainability KW - Deformation KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1611642570?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.atitle=A+high+performance+separator+with+improved+thermal+stability+for+Li-ion+batteries&rft.au=Woo%2C+Jung-Je%3BZhang%2C+Zhengcheng%3BDietz+Rago%2C+Nancy+L%3BLu%2C+Wenquan%3BAmine%2C+Khalil&rft.aulast=Woo&rft.aufirst=Jung-Je&rft.date=2013-07-01&rft.volume=1&rft.issue=30&rft.spage=8538&rft.isbn=&rft.btitle=&rft.title=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.issn=20507488&rft_id=info:doi/10.1039%2Fc3ta12154b LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-10-01 N1 - Number of references - 20 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Composite materials; Batteries; Inversion; Energy; Sustainability; Deformation DO - http://dx.doi.org/10.1039/c3ta12154b ER - TY - JOUR T1 - Hybrid Monte Carlo-CMFD Methods for Accelerating Fission Source Convergence AN - 1448745887; 18638172 AB - In this paper, two modifications to improve the efficiency of Lee et al.'s recently proposed "CMFD [coarse-mesh finite difference]-accelerated Monte Carlo" method for neutron criticality problems are presented and tested. This CMFD method employs standard Monte Carlo techniques to estimate nonlinear functionals (ratios of integrals), which are used in low-order CMFD equations to obtain the eigenvalue and discrete representations of the eigenfunction. In a "feedback" procedure, the Monte Carlo fission source is then modified to match the resulting CMFD fission source. The proposed new methods differ from the CMFD-accelerated Monte Carlo method only in the definition of the nonlinear functionals. The new methods are compared with the CMFD-accelerated Monte Carlo method for two high-dominance-ratio test problems. All of the hybrid methods rapidly converge the Monte Carlo fission source, enabling a large reduction in the number of inactive cycles. However, the new methods stabilize the fission source more efficiently than the CMFD-accelerated Monte Carlo method, enabling a reduction in the number of active cycles as well. Also, in all the hybrid methods, the apparent variance of the eigenfunction is nearly equal to the real variance, so the real statistical error is well estimated from a single calculation. This is a major advantage over the standard Monte Carlo method, in which the real variance is typically underestimated due to intercycle correlations. JF - Nuclear Science and Engineering AU - Wolters, Emily R AU - Larsen, Edward W AU - Martin, William R AD - Argonne National Laboratory, 9700 S Cass Avenue, Argonne, Illinois 60439 ewolters@anl.gov Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - 286 EP - 299 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 174 IS - 3 SN - 0029-5639, 0029-5639 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Reduction KW - Variance KW - Monte Carlo methods KW - Eigenfunctions KW - Standards KW - Nonlinearity KW - Mathematical analysis KW - Fission UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1448745887?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Science+and+Engineering&rft.atitle=Hybrid+Monte+Carlo-CMFD+Methods+for+Accelerating+Fission+Source+Convergence&rft.au=Wolters%2C+Emily+R%3BLarsen%2C+Edward+W%3BMartin%2C+William+R&rft.aulast=Wolters&rft.aufirst=Emily&rft.date=2013-07-01&rft.volume=174&rft.issue=3&rft.spage=286&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-11-01 N1 - Number of references - 11 N1 - Last updated - 2013-11-06 ER - TY - JOUR T1 - Considering water availability and wastewater resources in the development of algal bio-oil AN - 1434012996; 18483421 AB - This study aims to quantify water appropriation and the potential production of algal bio-oil using freshwater and municipal wastewater effluent ( MWW ) as an alternative water resource. The county-level analysis focuses on open-pond algae cultivation systems located in 17 states in the southern United States. Several scenarios were developed to examine the water availability for algae bio-oil production under various water resource mixing MWW and freshwater. The results of the analysis indicate that water availability can significantly affect the selection of an algal refinery site and therefore the potential production of algal bio-oil. The production of one liter of algal bio-oil requires 1036-1666L of water at the state level, in which 3% to 91% can be displaced by MWW , depending on the biorefinery location. This water requirement corresponds to a total of 25billion liters of bio-oil produced if the spatially and temporally available MWW effluent together with 10% of total available freshwater are used. The production of algal bio-oil is only 14% of estimated production under the assumption that all of the water demand can be fulfilled without any restriction. In addition, if only the spatially and temporally available effluent is used as the sole source of water, the total bio-oil production is estimated to be 9 billion liters. This study not only quantifies the water demands of the algal bio-oil, but it also elucidates the importance of taking water sustainability into account in the development of algal bio-oil. [copy 2013 Society of Chemical Industry and John Wiley & Sons, Ltd JF - Biofuels, Bioproducts and Biorefining AU - Chiu, Yi-Wen AU - Wu, May AD - Energy Systems Division, Argonne National Laboratory, Argonne, IL, USA. Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - 406 EP - 415 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 7 IS - 4 SN - 1932-104X, 1932-104X KW - Microbiology Abstracts C: Algology, Mycology & Protozoology; Biotechnology and Bioengineering Abstracts KW - algal bio-oil KW - biofuel KW - freshwater KW - wastewater KW - sustainability KW - refinery KW - Freshwater environments KW - Water requirements KW - Water resources KW - Refining KW - Effluents KW - Waste water KW - Water availability KW - Biofuels KW - Algae KW - K 03490:Miscellaneous KW - W 30950:Waste Treatment & Pollution Clean-up UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434012996?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biofuels%2C+Bioproducts+and+Biorefining&rft.atitle=Considering+water+availability+and+wastewater+resources+in+the+development+of+algal+bio-oil&rft.au=Chiu%2C+Yi-Wen%3BWu%2C+May&rft.aulast=Chiu&rft.aufirst=Yi-Wen&rft.date=2013-07-01&rft.volume=7&rft.issue=4&rft.spage=406&rft.isbn=&rft.btitle=&rft.title=Biofuels%2C+Bioproducts+and+Biorefining&rft.issn=1932104X&rft_id=info:doi/10.1002%2Fbbb.1397 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Freshwater environments; Water requirements; Water resources; Refining; Waste water; Effluents; Water availability; Biofuels; Algae DO - http://dx.doi.org/10.1002/bbb.1397 ER - TY - JOUR T1 - Assessment of Dynamical Downscaling in Near-Surface Fields with Different Spectral Nudging Approaches Using the Nested Regional Climate Model (NRCM) AN - 1419362548; 18266781 AB - Dynamic downscaling with regional-scale climate models is used widely for increasing the spatial resolution of global-scale climate model projections. One uncertainty in generating these projections is the choice of boundary forcing applied. In this study the Nested Regional Climate Model (NRCM) is used with a grid spacing of 12 km over the United States (excluding Hawaii) to dynamically downscale 2.5 degree National Centers for Environmental Prediction-U.S. Department of Energy Reanalysis-2 data, with different applications of spectral nudging (SN) for the boundary conditions. Nine numerical experiments for July 2005-each with different wavenumbers and nudging duration periods, applied to different model layers-evaluated the performance of SN in downscaling near-surface fields. The calculations were compared with the North America Regional Reanalysis dataset over four subregions of the contiguous 48 states. Results show significant differences with different wavenumbers, nudging duration periods, and nudging altitudes. The short-period SN with three waves, applied above 850 hPa, showed the highest skill in simulating precipitation, whereas whole-period SN produced a higher skill level and performed slightly better than short-period SN for surface temperature and 10-m wind, respectively. Differences in the performance of SN applied at different altitudes were not significant. On the basis of the comparisons for precipitation, surface temperature, and wind fields over entire contiguous states, whole-period nudging with six waves starting above 850 hPa for downscaling calculations for climate-related variables is recommended. This method improved the performance of the NRCM in predicting near-surface fields by more than 30.5% relative to a case with no nudging. JF - Journal of Applied Meteorology and Climatology AU - Wang, Jiali AU - Kotamarthi, Veerabhadra R AD - Environmental Science Division, Argonne National Laboratory, Argonne, Illinois Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - 1576 EP - 1591 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 52 IS - 7 SN - 1558-8424, 1558-8424 KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts KW - Altitude KW - USA, Hawaii KW - Precipitation KW - ENA 03:Energy KW - M2 551.581:Latitudinal Influences (551.581) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1419362548?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Applied+Meteorology+and+Climatology&rft.atitle=Assessment+of+Dynamical+Downscaling+in+Near-Surface+Fields+with+Different+Spectral+Nudging+Approaches+Using+the+Nested+Regional+Climate+Model+%28NRCM%29&rft.au=Wang%2C+Jiali%3BKotamarthi%2C+Veerabhadra+R&rft.aulast=Wang&rft.aufirst=Jiali&rft.date=2013-07-01&rft.volume=52&rft.issue=7&rft.spage=1576&rft.isbn=&rft.btitle=&rft.title=Journal+of+Applied+Meteorology+and+Climatology&rft.issn=15588424&rft_id=info:doi/10.1175%2FJAMC-D-12-0302.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-08-01 N1 - Number of references - 1 N1 - Last updated - 2014-02-11 N1 - SubjectsTermNotLitGenreText - Precipitation; Altitude; USA, Hawaii DO - http://dx.doi.org/10.1175/JAMC-D-12-0302.1 ER - TY - JOUR T1 - Inter-personal interactions and constraints in travel behavior within households and social networks AN - 1418137212; 4456850 AB - The need for modeling interactions between agents and the impact these interactions can have on activitytravel patterns has received much attention in recent years, with much of this attention focused on interactions between agents of a single household. Eric Miller has stated that, much of the behavior of interest (in integrated urban modeling) involves the interaction among people (Miller 2006). The first such effects to be studied and incorporated in travel demand models were interactions within households, for example serving dependents, modeling joint trips, task allocation and joint scheduling (Miller and Roorda 2003). Several of these features are now common aspects of activity-based models implemented by planning agencies, e.g. the CT-RAMP family of models (Vovsha et al. 2010). However, it is clear that many types of interaction behavior can occur outside of the household context and that even within the household many types of interaction behavior still remain to be studied and modeled. The effects of agent-interactions and the constraints on behavior that they can impose are still only partially understood. In addition, while much work has been done on understanding the basic characteristics and formation processes of social networks outside of the household and their impacts on aspects of activitytravel (e.g. Habib and Carrasco 2011), comparatively little has been done to integrate these findings into activity-based model frameworks as suggested by Arentze and Timmermans (2008). More theoretical understanding of the behaviors that govern agent interactions, both within and outside of the household, and especially on how information exchange and decisionmaking occurs within agent groups is needed. Reprinted by permission of Springer JF - Transportation AU - Auld, Joshua AU - Zhang, Lei AD - Argonne National Laboratory ; University of Maryland Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - 751 EP - 754 VL - 40 IS - 4 SN - 0049-4488, 0049-4488 KW - Sociology KW - Travel KW - Decision making KW - Social networks KW - Households KW - Information exchange UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1418137212?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aibss&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transportation&rft.atitle=Inter-personal+interactions+and+constraints+in+travel+behavior+within+households+and+social+networks&rft.au=Auld%2C+Joshua%3BZhang%2C+Lei&rft.aulast=Auld&rft.aufirst=Joshua&rft.date=2013-07-01&rft.volume=40&rft.issue=4&rft.spage=751&rft.isbn=&rft.btitle=&rft.title=Transportation&rft.issn=00494488&rft_id=info:doi/10.1007%2Fs11116-013-9474-5 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2013-07-08 N1 - Last updated - 2013-09-16 N1 - SubjectsTermNotLitGenreText - 11873 8634; 6040 5676; 6522 4577 3872 554 971; 3322 6071 1542 11325; 12952 7336 3198 DO - http://dx.doi.org/10.1007/s11116-013-9474-5 ER - TY - JOUR T1 - MAINTAINING STRONG RADIATION PROTECTION PROGRAMS IN THE FACE OF SHRINKING DOE BUDGETS AN - 1412552515; 18229417 AB - Creative methods are needed to ensure compliance and maintain strong radiation protection programs in light of smaller budgets. The nation's top government stories have recently focused on the "fiscal cliff," automatic spending cuts to the government, and budgets under continuing resolution. In addition, many U.S. Department of Energy (DOE) sites have switched from production to environmental cleanup mode, and the national laboratories are devoting less of their work to nuclear or radiological research and development. As a result, radiation protection organizations are facing uncertainty and significant budget pressures and are forced to do more with less; minimal staffing levels are expected to continue to support radiological work and maintain full compliance while under increasing scrutiny of regulators. Ideally, the radiation protection program was strong, robust, and mature prior to the budget pressures. It is easier to maintain a strong program than to create a new program or upgrade a program that needs significant revisions. However, even in the case of creating a new program, efficiencies can be gained by using a graded approach, establishing a good rapport with the regulator, working with stakeholders to develop acceptable approaches, and using approved consensus standards in lieu of developing new approaches. The presentation evaluates methods for upgrading or revising existing programs as well as for developing new programs, including outsourcing of specific program elements, increased usage of commercial vendors, and nontraditional staffing approaches. Lessons learned and the pros and cons from DOE case studies are presented. JF - Health Physics AU - Ikenberry, T AU - Wright, E AU - Hearnsberger, D AU - Herrington, W III AU - McCartney, K AD - Dade Moeller, Argonne National Laboratory Y1 - 2013/07// PY - 2013 DA - Jul 2013 SP - S97 EP - S98 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 105 IS - 1 SN - 0017-9078, 0017-9078 KW - Pollution Abstracts KW - Stakeholders KW - USA KW - Case studies KW - Pollution clean-up KW - Outsourcing KW - Compliance KW - Budgets KW - Cliffs KW - Nuclear energy KW - Research programs KW - P 8000:RADIATION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1412552515?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Health+Physics&rft.atitle=MAINTAINING+STRONG+RADIATION+PROTECTION+PROGRAMS+IN+THE+FACE+OF+SHRINKING+DOE+BUDGETS&rft.au=Ikenberry%2C+T%3BWright%2C+E%3BHearnsberger%2C+D%3BHerrington%2C+W+III%3BMcCartney%2C+K&rft.aulast=Ikenberry&rft.aufirst=T&rft.date=2013-07-01&rft.volume=105&rft.issue=1&rft.spage=S97&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-07-01 N1 - Last updated - 2014-04-17 N1 - SubjectsTermNotLitGenreText - Stakeholders; Case studies; Pollution clean-up; Outsourcing; Compliance; Nuclear energy; Cliffs; Budgets; Research programs; USA ER - TY - JOUR T1 - Expert assessment of vulnerability of permafrost carbon to climate change AN - 1400630278; 676985-12 AB - Approximately 1700 Pg of soil carbon (C) are stored in the northern circumpolar permafrost zone, more than twice as much C than in the atmosphere. The overall amount, rate, and form of C released to the atmosphere in a warmer world will influence the strength of the permafrost C feedback to climate change. We used a survey to quantify variability in the perception of the vulnerability of permafrost C to climate change. Experts were asked to provide quantitative estimates of permafrost change in response to four scenarios of warming. For the highest warming scenario (RCP 8.5), experts hypothesized that C release from permafrost zone soils could be 19-45 Pg C by 2040, 162-288 Pg C by 2100, and 381-616 Pg C by 2300 in CO (sub 2) equivalent using 100-year CH (sub 4) global warming potential (GWP). These values become 50 % larger using 20-year CH (sub 4) GWP, with a third to a half of expected climate forcing coming from CH (sub 4) even though CH (sub 4) was only 2.3 % of the expected C release. Experts projected that two-thirds of this release could be avoided under the lowest warming scenario (RCP 2.6). These results highlight the potential risk from permafrost thaw and serve to frame a hypothesis about the magnitude of this feedback to climate change. However, the level of emissions proposed here are unlikely to overshadow the impact of fossil fuel burning, which will continue to be the main source of C emissions and climate forcing. Copyright 2013 Springer Science+Business Media Dordrecht and The Author(s) JF - Climatic Change AU - Schuur, E A G AU - Abbott, B W AU - Bowden, W B AU - Brovkin, V AU - Camill, P AU - Canadell, J G AU - Chanton, J P AU - Chapin, F S, III AU - Christensen, T R AU - Ciais, P AU - Crosby, B T AU - Czimczik, C I AU - Grosse, G AU - Harden, J AU - Hayes, D J AU - Hugelius, G AU - Jastrow, J D AU - Jones, J B AU - Kleinen, T AU - Koven, C D AU - Krinner, G AU - Kuhry, P AU - Lawrence, D M AU - McGuire, A D AU - Natali, S M AU - O'Donnell, J A AU - Ping, C L AU - Riley, W J AU - Rinke, A AU - Romanovsky, V E AU - Sannel, A B K AU - Schadel, C AU - Schaefer, K AU - Sky, J AU - Subin, Z M AU - Tarnocai, C AU - Turetsky, M R AU - Waldrop, M P AU - Walter Anthony, K M AU - Wickland, K P AU - Wilson, C J AU - Zimov, S A Y1 - 2013/07// PY - 2013 DA - July 2013 SP - 359 EP - 374 PB - Springer, Dordrecht VL - 119 IS - 2 SN - 0165-0009, 0165-0009 KW - soils KW - experts KW - permafrost KW - prediction KW - atmosphere KW - global change KW - carbon release KW - climate change KW - carbon dioxide KW - feedback KW - future KW - carbon KW - natural hazards KW - risk assessment KW - climate KW - global warming KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1400630278?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Climatic+Change&rft.atitle=Expert+assessment+of+vulnerability+of+permafrost+carbon+to+climate+change&rft.au=Schuur%2C+E+A+G%3BAbbott%2C+B+W%3BBowden%2C+W+B%3BBrovkin%2C+V%3BCamill%2C+P%3BCanadell%2C+J+G%3BChanton%2C+J+P%3BChapin%2C+F+S%2C+III%3BChristensen%2C+T+R%3BCiais%2C+P%3BCrosby%2C+B+T%3BCzimczik%2C+C+I%3BGrosse%2C+G%3BHarden%2C+J%3BHayes%2C+D+J%3BHugelius%2C+G%3BJastrow%2C+J+D%3BJones%2C+J+B%3BKleinen%2C+T%3BKoven%2C+C+D%3BKrinner%2C+G%3BKuhry%2C+P%3BLawrence%2C+D+M%3BMcGuire%2C+A+D%3BNatali%2C+S+M%3BO%27Donnell%2C+J+A%3BPing%2C+C+L%3BRiley%2C+W+J%3BRinke%2C+A%3BRomanovsky%2C+V+E%3BSannel%2C+A+B+K%3BSchadel%2C+C%3BSchaefer%2C+K%3BSky%2C+J%3BSubin%2C+Z+M%3BTarnocai%2C+C%3BTuretsky%2C+M+R%3BWaldrop%2C+M+P%3BWalter+Anthony%2C+K+M%3BWickland%2C+K+P%3BWilson%2C+C+J%3BZimov%2C+S+A&rft.aulast=Schuur&rft.aufirst=E+A&rft.date=2013-07-01&rft.volume=119&rft.issue=2&rft.spage=359&rft.isbn=&rft.btitle=&rft.title=Climatic+Change&rft.issn=01650009&rft_id=info:doi/10.1007%2Fs10584-013-0730-7 L2 - http://www.springerlink.com/(hc4pmh453vbxpeaygjkevi45)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100247,1 LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Number of references - 46 N1 - Document feature - illus. N1 - Last updated - 2017-01-24 N1 - CODEN - CLCHDX N1 - SubjectsTermNotLitGenreText - atmosphere; carbon; carbon dioxide; carbon release; climate; climate change; experts; feedback; future; global change; global warming; natural hazards; permafrost; prediction; risk assessment; soils DO - http://dx.doi.org/10.1007/s10584-013-0730-7 ER - TY - CPAPER T1 - Idling Reduction: An Easy Way to Reduce Air Pollution from Vehicles T2 - 106th Air and Waste Management Association Annual Conference (ACE 2013) AN - 1420115294; 6231306 JF - 106th Air and Waste Management Association Annual Conference (ACE 2013) AU - Gaines, L AU - Weikersheimer, P Y1 - 2013/06/25/ PY - 2013 DA - 2013 Jun 25 KW - Air pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1420115294?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=106th+Air+and+Waste+Management+Association+Annual+Conference+%28ACE+2013%29&rft.atitle=Idling+Reduction%3A+An+Easy+Way+to+Reduce+Air+Pollution+from+Vehicles&rft.au=Gaines%2C+L%3BWeikersheimer%2C+P&rft.aulast=Gaines&rft.aufirst=L&rft.date=2013-06-25&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=106th+Air+and+Waste+Management+Association+Annual+Conference+%28ACE+2013%29&rft.issn=&rft_id=info:doi/ L2 - http://ace2013.awma.org/wp-content/uploads/2013/06/ACE-2013-Final-Program.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-07-31 N1 - Last updated - 2013-08-14 ER - TY - JOUR T1 - Plasmonic amplifiers: engineering giant light enhancements by tuning resonances in multiscale plasmonic nanostructures. AN - 1365056023; 23281210 AB - The unique ability of plasmonic nanostructures to guide, enhance, and manipulate subwavelength light offers multiple novel applications in chemical and biological sensing, imaging, and photonic microcircuitry. Here the reproducible, giant light amplification in multiscale plasmonic structures is demonstrated. These structures combine strongly coupled components of different dimensions and topologies that resonate at the same optical frequency. A light amplifier is constructed using a silver mirror carrying light-enhancing surface plasmons, dielectric gratings forming distributed Bragg cavities on top of the mirror, and gold nanoparticle arrays self-assembled into the grating grooves. By tuning the resonances of the individual components to the same frequency, multiple enhancement of the light intensity in the nanometer gaps between the particles is achieved. Using a monolayer of benzenethiol molecules on this structure, an average SERS enhancement factor ∼10⁸ is obtained, and the maximum enhancement in the interparticle hot-spots is ∼3 × 10¹⁰, in good agreement with FDTD calculations. The high enhancement factor, large density of well-ordered hot-spots, and good fidelity of the SERS signal make this design a promising platform for quantitative SERS sensing, optical detection, efficient solid state lighting, advanced photovoltaics, and other emerging photonic applications. JF - Small (Weinheim an der Bergstrasse, Germany) AU - Chen, Aiqing AU - Miller, Ryan L AU - DePrince, A Eugene AU - Joshi-Imre, Alexandra AU - Shevchenko, Elena AU - Ocola, Leonidas E AU - Gray, Stephen K AU - Welp, Ulrich AU - Vlasko-Vlasov, Vitalii K AD - Materials Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA. aiqingchen@anl.gov Y1 - 2013/06/10/ PY - 2013 DA - 2013 Jun 10 SP - 1939 EP - 1946 VL - 9 IS - 11 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1365056023?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Small+%28Weinheim+an+der+Bergstrasse%2C+Germany%29&rft.atitle=Plasmonic+amplifiers%3A+engineering+giant+light+enhancements+by+tuning+resonances+in+multiscale+plasmonic+nanostructures.&rft.au=Chen%2C+Aiqing%3BMiller%2C+Ryan+L%3BDePrince%2C+A+Eugene%3BJoshi-Imre%2C+Alexandra%3BShevchenko%2C+Elena%3BOcola%2C+Leonidas+E%3BGray%2C+Stephen+K%3BWelp%2C+Ulrich%3BVlasko-Vlasov%2C+Vitalii+K&rft.aulast=Chen&rft.aufirst=Aiqing&rft.date=2013-06-10&rft.volume=9&rft.issue=11&rft.spage=1939&rft.isbn=&rft.btitle=&rft.title=Small+%28Weinheim+an+der+Bergstrasse%2C+Germany%29&rft.issn=1613-6829&rft_id=info:doi/10.1002%2Fsmll.201202216 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2014-01-06 N1 - Date created - 2013-06-04 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Erratum In: Small. 2013 Nov 25;9(22):3734 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1002/smll.201202216 ER - TY - JOUR T1 - Study of Thermal Decomposition of Li sub(1-x)(Ni sub(1/3)Mn sub(1/3)Co sub(1/3)) sub(0.9)O sub(2) Using In-Situ High-Energy X-Ray Diffraction AN - 1770342910; 18479222 AB - Safety has been a major technological concern hindering the deployment of lithium-ion batteries for automobile applications. We investigated the decomposition mechanism of delithiated cathode materials at thermal abuse conditions using Li sub(1.1)[Ni sub(1/3)Mn sub(1/3)Co sub(1/3)] sub(0.9)O sub(2) as a model cathode material. An in-situ high-energy X-ray diffraction technique was established as an alternative to conventional thermal analysis techniques like differential scanning calorimetry and accelerating rate calorimetry. The X-ray diffraction data revealed that the thermal decomposition pathway of delithiated Li sub(1-x)[Ni sub(1/3)Mn sub(1/3)Co sub(1/3)] sub(0.9)O sub(2) strongly depended on the exposed chemical environment, like solvents and lithium salts. A phase transformation of dry delithiated Li sub(1-x)[Ni sub(1/3)Mn sub(1/3)Co sub(1/3)] sub(0.9)O sub(2) was observed at about 278 degree C, and its onset temperature was reduced to about 197 degree C with the presence of the electrolyte. It is suggested that the reduction in thermal stability is possibly related to proton intercalation into the delithiated material. An in-situ high-energy X-ray diffraction technique is deployed to investigate the thermal decomposition of a delithiated Li sub(1-x)[Ni sub(1/3)Mn sub(1/3)Co sub(1/3)] sub(0.9)O sub(2) cathode during thermal abuse. A mechanism based on proton intercalation is proposed to explain the negative impact of LiPF sub(6) on the thermal stability of Li sub(1-x)[Ni sub(1/3)Mn sub(1/3)Co sub(1/3)] sub(0.9)O sub(2). JF - Advanced Energy Materials AU - Chen, Zonghai AU - Ren, Yang AU - Lee, Eungje AU - Johnson, Christopher AU - Qin, Yan AU - Amine, Khalil AD - X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA. Zonghai.chen@anl.gov Y1 - 2013/06// PY - 2013 DA - June 2013 SP - 729 EP - 736 PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 3 IS - 6 SN - 1614-6832, 1614-6832 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); ANTE: Abstracts in New Technologies and Engineering (AN); Aerospace & High Technology Database (AH) KW - cathode KW - in-situ high-energy X-ray diffraction KW - lithium-ion battery KW - safety KW - thermal decomposition KW - Rechargeable batteries KW - Cathodes KW - X-rays KW - Thermal decomposition KW - Thermal stability KW - Intercalation KW - Diffraction KW - Lithium batteries KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770342910?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advanced+Energy+Materials&rft.atitle=Study+of+Thermal+Decomposition+of+Li+sub%281-x%29%28Ni+sub%281%2F3%29Mn+sub%281%2F3%29Co+sub%281%2F3%29%29+sub%280.9%29O+sub%282%29+Using+In-Situ+High-Energy+X-Ray+Diffraction&rft.au=Chen%2C+Zonghai%3BRen%2C+Yang%3BLee%2C+Eungje%3BJohnson%2C+Christopher%3BQin%2C+Yan%3BAmine%2C+Khalil&rft.aulast=Chen&rft.aufirst=Zonghai&rft.date=2013-06-01&rft.volume=3&rft.issue=6&rft.spage=729&rft.isbn=&rft.btitle=&rft.title=Advanced+Energy+Materials&rft.issn=16146832&rft_id=info:doi/10.1002%2Faenm.201201059 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-03-04 DO - http://dx.doi.org/10.1002/aenm.201201059 ER - TY - JOUR T1 - Irradiation Behavior Analysis for U-Mo/Al Dispersion Fuels AN - 1671544416; 18278185 AB - DART-THERMAL has been applied to analyze the AFIP-1 full-sized fuel plate test Because DART-THERMAL calculations provide spatially averaged information, individual cases were set up corresponding to each PIE region. Each PIE region was treated as a section of fuel plate with the same geometry as a full-sized fuel plate with the exception of a minimized length of 1 inch. The good agreement of code calculated and experimental measured data demonstrates DART-THERMAL is able to provide an integrated analysis for many interdependent fuel behavior phenomena in full-sized dispersion fuel plates. JF - Transactions of the American Nuclear Society AU - Ye, Bei AU - Rest, Jeffery AU - Kim, Yeon Soo AU - Hofman, Gerard AD - Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, USA bye@anl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 378 EP - 380 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE); Aluminium Industry Abstracts (AI) KW - Dispersions KW - Irradiation KW - Fuels KW - Aluminum KW - Accuracy KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671544416?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Irradiation+Behavior+Analysis+for+U-Mo%2FAl+Dispersion+Fuels&rft.au=Ye%2C+Bei%3BRest%2C+Jeffery%3BKim%2C+Yeon+Soo%3BHofman%2C+Gerard&rft.aulast=Ye&rft.aufirst=Bei&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=378&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 6 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Thermal Degradation of U-Mo Fuel Dispersion in Al Matrix during Irradiation AN - 1671509789; 18278183 AB - U-Mo alloy fuel has a potential to convert research and test reactor fuels from HEU to LEU because of its high density. It has received extensive in-pile and out-of-pile tests and analyses, so ample data have been accumulated. The major fuel geometry for an MTR type research and test reactor is a plate, containing a fuel meat that comprises fuel particles dispersed in an inert matrix such as aluminum. The most popular cladding material is aluminum alloy. Cladding is directly bonded to the fuel meat. The main performance topics dealt with for an MTR type fuel plate are plate dimension changes and fuel temperature. Thermal properties of the non-irradiated fuel constituents and cladding are well known. However, during irradiation, thermal degradation of the fuel meat and cladding occurs. This paper summarizes the modeling methods to estimate the thermal degradation of U-Mo dispersion in Al, designated U-Mo/Al hereafter, during irradiation. JF - Transactions of the American Nuclear Society AU - Kim, Yeon Soo AD - Argonne National Laboratory, 9700 S Cass Ave, Argonne, IL 60439, USA vskim@xml.eov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 371 EP - 372 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE); Aluminium Industry Abstracts (AI) KW - Meat KW - Dispersions KW - Thermal degradation KW - Cladding KW - Aluminum base alloys KW - Irradiation KW - Fuels KW - Aluminum UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671509789?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Thermal+Degradation+of+U-Mo+Fuel+Dispersion+in+Al+Matrix+during+Irradiation&rft.au=Kim%2C+Yeon+Soo&rft.aulast=Kim&rft.aufirst=Yeon&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=371&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 6 N1 - Last updated - 2015-04-09 ER - TY - JOUR T1 - Fission induced swelling and creep of U-Mo alloy fuel AN - 1475541704; 18796692 AB - Tapering of U-Mo alloy fuel at the end of plates is attributed to lateral mass transfer by fission induced creep, by which fuel mass is relocated away from the fuel end region where fission product induced fuel swelling is in fact the highest. This mechanism permits U-Mo fuel to achieve high burnup by effectively relieving stresses at the fuel end region, where peak stresses are otherwise expected because peak fission product induced fuel swelling occurs there. ABAQUS FEA was employed to examine whether the observed phenomenon can be simulated using physical-mechanical data available in the literature. The simulation results obtained for several plates with different fuel fabrication and loading scheme showed that the measured data were able to be simulated with a reasonable creep rate coefficient. The obtained creep rate constant lies between values for pure uranium and MOX, and is greater than all other ceramic uranium fuels. JF - Journal of Nuclear Materials AU - Kim, Yeon Soo AU - Hofman, G L AU - Cheon, J S AU - Robinson, A B AU - Wachs, D M AD - Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA, yskim@anl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 37 EP - 46 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 437 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Fission products KW - Ceramics KW - Creep KW - Fuels KW - Uranium KW - Nuclear fuels KW - Radioactive materials KW - Alloys KW - Stress KW - Simulation KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475541704?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Fission+induced+swelling+and+creep+of+U-Mo+alloy+fuel&rft.au=Kim%2C+Yeon+Soo%3BHofman%2C+G+L%3BCheon%2C+J+S%3BRobinson%2C+A+B%3BWachs%2C+D+M&rft.aulast=Kim&rft.aufirst=Yeon&rft.date=2013-06-01&rft.volume=437&rft.issue=1-3&rft.spage=37&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 23 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Ceramics; Fission products; Creep; Uranium; Fuels; Radioactive materials; Nuclear fuels; Simulation; Stress; Alloys ER - TY - JOUR T1 - A mean residence time relationship for lateral cavities in gravel-bed rivers and streams; incorporating streambed roughness and cavity shape AN - 1442374323; 2013-081753 AB - Accurate estimates of mass-exchange parameters in transient storage zones are needed to better understand and quantify solute transport and dispersion in riverine systems. Currently, the predictive mean residence time relies on an empirical entrainment coefficient with a range in variance due to the absence of hydraulic and geomorphic quantities driving mass exchange. Two empirically derived relationships are presented for the mean residence time of lateral cavities-a prevalent and widely recognized type of transient storage-in gravel-bed rivers and streams that incorporates hydraulic and geomorphic parameters. The relationships are applicable for gravel-bed rivers and streams with a range of cavity width to length (W/L) aspect ratios (0.2-0.75), shape, and Reynolds numbers (Re, ranging from 1.0 X 10 (super 4) to 1.0 X 10 (super 7) ). The relationships equate normalized mean residence time to nondimensional quantities: Froude number, Re, W/L, depth ratio (ratio of cavity to shear layer depth), roughness factor (ratio of shear to channel velocity), and shape factor (representing degree of cavity equidimensionality). One relationship excludes bed roughness (equation (13)) and the other includes bed roughness (equation (14)). The empirically derived relationships have been verified for conservative tracers (R (super 2) of 0.83) within a range of flow and geometry conditions. Topics warranting future research are testing the empirical relationship that includes the roughness factor using parameters measured in the vicinity of the cavity to reduce the variance in the correlation, and further development of the relationship for nonconservative transport. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Water Resources Research AU - Jackson, Tracie R AU - Haggerty, Roy AU - Apte, Sourabh V AU - O'Connor, Ben L Y1 - 2013/06// PY - 2013 DA - June 2013 SP - 3642 EP - 3650 PB - American Geophysical Union, Washington, DC VL - 49 IS - 6 SN - 0043-1397, 0043-1397 KW - hydrology KW - numerical models KW - roughness KW - channels KW - equations KW - rivers KW - transient phenomena KW - transport KW - gravel-bed streams KW - residence time KW - tracers KW - shear KW - fluvial features KW - velocity KW - streams KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1442374323?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=A+mean+residence+time+relationship+for+lateral+cavities+in+gravel-bed+rivers+and+streams%3B+incorporating+streambed+roughness+and+cavity+shape&rft.au=Jackson%2C+Tracie+R%3BHaggerty%2C+Roy%3BApte%2C+Sourabh+V%3BO%27Connor%2C+Ben+L&rft.aulast=Jackson&rft.aufirst=Tracie&rft.date=2013-06-01&rft.volume=49&rft.issue=6&rft.spage=3642&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1002%2Fwrcr.20272 L2 - http://www.agu.org/journals/wr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 78 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2013-10-17 N1 - CODEN - WRERAQ N1 - SubjectsTermNotLitGenreText - channels; equations; fluvial features; gravel-bed streams; hydrology; numerical models; residence time; rivers; roughness; shear; streams; tracers; transient phenomena; transport; velocity DO - http://dx.doi.org/10.1002/wrcr.20272 ER - TY - JOUR T1 - Pulse Superimposition Calculation Methodology for Rossi- alpha Distribution Using MCNP6 AN - 1429877853; 18278272 AB - This study introduces a calculation methodology for obtaining the Rossi-a distribution by MCNP6 computer simulations. This methodology was applied to a subcritical assembly driven by a pulsed neutron source utilizing PTRAC and F8 cards of MCNP6. The computational results agree with the experimental data obtained in the YALINA Thermal subcritical assembly loaded with 280 fuel rods. JF - Transactions of the American Nuclear Society AU - Talamo, A AU - Gohar, Y AU - Sadovich, S AU - Kiyavitskaya, H AU - Bournos, V AU - Fokov, Y AU - Routkovskaya, C AD - Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA alby@anl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 722 EP - 723 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Neutron sources KW - Computation KW - Computer simulation KW - Nuclear fuel elements KW - Assembly KW - Cards KW - Methodology KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429877853?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Pulse+Superimposition+Calculation+Methodology+for+Rossi-+alpha+Distribution+Using+MCNP6&rft.au=Talamo%2C+A%3BGohar%2C+Y%3BSadovich%2C+S%3BKiyavitskaya%2C+H%3BBournos%2C+V%3BFokov%2C+Y%3BRoutkovskaya%2C+C&rft.aulast=Talamo&rft.aufirst=A&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=722&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/10.1088%2F1367-2630%2F15%2F10%2F105021 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 5 N1 - Last updated - 2013-09-05 ER - TY - JOUR T1 - The Effects of Pin Conduction in CFD Simulations of SFR Pin-Bundles AN - 1429877226; 18278340 AB - The RANS-based CFD simulation results are compared with the EBR-II X494 and X495 experimental results and the results from a subchannel code. Large differences were found in all code predictions. However, considering the large uncertainty of the TED temperature measurements in the experiments, the CFD simulation results are reasonably well in agreement with the experiments. Additionally, the CFD temperature predications are overestimated at the inner pins but underestimated at the outer pins if a fixed heat flux boundary condition is used. It can be concluded that the detailed conjugate heat transfer should be modeled to account for the heat conduction in the fuel pins for more accurate temperature predictions in the wire-wrapped pin-bundles. JF - Transactions of the American Nuclear Society AU - Hu, Rui AD - Argonne National Laboratory: 9700 S Cass Avenue, Argonne, IL 60439, USA rhu@lanl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 991 EP - 993 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Heat conduction KW - Computational fluid dynamics KW - Mathematical models KW - Computer simulation KW - Simulation KW - Conjugates KW - Conduction KW - Heat transfer UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429877226?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=The+Effects+of+Pin+Conduction+in+CFD+Simulations+of+SFR+Pin-Bundles&rft.au=Hu%2C+Rui&rft.aulast=Hu&rft.aufirst=Rui&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=991&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 5 N1 - Last updated - 2014-04-08 ER - TY - JOUR T1 - The Advanced Fuel Cycle Cost Basis for Reactor Technologies AN - 1429876845; 18278109 AB - The Advanced Fuel Cycle Cost Basis Report (AFC CBR, [1]) and its 2012 update have the primary intent of supporting the estimate of the cost of electricity (and/or heat) of various potential fuel cycle options. The dominant part of that cost and of the overall uncertainty of the cost of electricity comes generally from the capital cost of the nuclear reactors. Included in the AFC CBR is an estimate of the overnight capital cost for the fully deployed steady state systems. The challenge is to develop an estimate that is accurate and defensible based on the available information which often comes from data that are not representative of these conditions. The available data needs to be transformed into the specific overnight capital cost (SOCC) in the appropriate constant year dollars for the technology, scale, and other conditions of the final full scale (FS) Nth-of-a-kind (NOAK) commercial power plant. This requires a number of adjustments that can be quite uncertain. This paper reviews a proposed methodology in the 2012 update to the AFC CBR to address this challenge in a way that clearly documents the assumptions made to estimate this parameter, to ensure consistency between reactor concepts and also to provide other benefits to the users such as the ability to change those assumptions if desired. Also include is a summary of the proposed reactor costs in the 2012 update to the AFC CBR. JF - Transactions of the American Nuclear Society AU - Hoffman, Edward AU - Ganda, Francesco AD - Argonne National Laboratory, Nuclear Engineering Division, 9700 S Cass Avenue, Argonne, IL 60439 Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 101 EP - 103 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear power generation KW - Estimates KW - Nuclear reactors KW - Fuel cycles KW - Nuclear reactor components KW - Electricity KW - Consistency KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429876845?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=The+Advanced+Fuel+Cycle+Cost+Basis+for+Reactor+Technologies&rft.au=Hoffman%2C+Edward%3BGanda%2C+Francesco&rft.aulast=Hoffman&rft.aufirst=Edward&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=101&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 1 N1 - Last updated - 2014-04-08 ER - TY - JOUR T1 - Preliminary Assessment of Microstructural Evolution of U-10Mo Thin Specimen Annealed at Typical Fast Reactor Temperature Regime AN - 1429876116; 18278184 AB - U-Mo metallic alloys have been extensively used for the Reduced Enrichment Research and Test Reactors (RERTR) program. Moreover, it is currently being proposed as metallic fuel candidates for fast reactors due to its ideal thermal properties. More recent efforts were also spent to investigate the behaviors of this material along with U-Zr alloys under fast reactor conditions. Although microstructures and behaviors of U-Mo particles under irradiations in dispersion fuels have been quite extensively investigated with transmission electron microscopy (TEM) at RERTR temperature regimes (usually no higher than 200 degree C), the behaviors of monolithic U-Mo alloys have not been well understood at this microscopic level. JF - Transactions of the American Nuclear Society AU - Yun, D AU - Mohamed, W AU - Ye, B AU - Kirk, M A AU - Baldo, P AU - Yacout, A M AD - Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 divun@anl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 373 EP - 377 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); METADEX (MD); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Uranium base alloys KW - U-10Mo KW - Dispersions KW - Nuclear power generation KW - Nuclear reactors KW - Fuels KW - Alloys KW - Nuclear reactor components KW - Microstructure KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429876116?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Preliminary+Assessment+of+Microstructural+Evolution+of+U-10Mo+Thin+Specimen+Annealed+at+Typical+Fast+Reactor+Temperature+Regime&rft.au=Yun%2C+D%3BMohamed%2C+W%3BYe%2C+B%3BKirk%2C+M+A%3BBaldo%2C+P%3BYacout%2C+A+M&rft.aulast=Yun&rft.aufirst=D&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=373&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 8 N1 - Last updated - 2013-09-05 ER - TY - JOUR T1 - Nuclear Fuel Cycle Analysis and Optimization with the Code for Advanced Fuel Cycles Assessment (CAFCA) AN - 1429875255; 18278116 AB - Nuclear engineering is not limited to the realm of nuclear reactor development and design but is increasingly being driven by policy implications of the nuclear fuel cycle. With a supported research background on a variety of options including the strengths and weaknesses of the various fuel cycle options we can make optimal decisions for future political and economic factors. Such research has been carried out using the Code for Advanced Fuel Cycle Analysis (CAFCA). From its early development in the comparison of two advanced fuel cycle options to its current status at multi cycle and multi reactor type optimization, CAFCA has become a resource for analysis of the intricacies of the nuclear fuel cycle which require a dynamic study. JF - Transactions of the American Nuclear Society AU - Brinton, Samuel AU - Passerini, Stefano AU - Kazimi, Mujid AD - Massachusetts Institute of Technology, 77 Massachusetts Avenue, Building 24, Room 409, Cambridge, MA 02139 Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 131 EP - 133 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Nuclear reactors KW - Assessments KW - Fuel cycles KW - Nuclear fuels KW - Dynamic tests KW - Nuclear reactor components KW - Optimization KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429875255?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Nuclear+Fuel+Cycle+Analysis+and+Optimization+with+the+Code+for+Advanced+Fuel+Cycles+Assessment+%28CAFCA%29&rft.au=Brinton%2C+Samuel%3BPasserini%2C+Stefano%3BKazimi%2C+Mujid&rft.aulast=Brinton&rft.aufirst=Samuel&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=131&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 10 N1 - Last updated - 2014-04-08 ER - TY - JOUR T1 - On the relationship between dynamic solubility, multi-atom bubble nucleation, irradiation-induced re-solution, and the bubble size distribution in Xe implanted Mo AN - 1429875140; 18278178 AB - U-Mo alloys are candidate fuels for both research and test reactors, as well as for advanced power reactors. A critical requirement for these candidate fuels is stable swelling behavior over their expected lifetime. In-reactor deformation of these materials is primarily driven by irradiation induced swelling where the primary component is fission gas (Xe and Kr) generated by decay of the primary fission products. An understanding of the behavior of the gas in the material as a function of design operating conditions, such as temperature and fission-rate, is greatly leveraged by the development of mechanistic models. Due to the inherent uncertainty of proposed behavioral mechanisms resulting from the unavailability of critical materials properties of the irradiated material, these models require extensive validation. In-reactor experiments and the associated post-irradiation examinations are expensive. In addition, it is very difficult to validate single effect mechanisms from a multivariate environment. For that reason, ion implantation experiments are often used to facilitate the validation process. However, the interpretation of ion implantation experiments and the mapping of the observed phenomena to an in-reactor environment is complicated by the non-homogeneous nature of the implantation process, thin specimen size that introduces surface effects, as well as operating conditions that are outside the range of in-reactor design specifications. This paper proposes a theoretical foundation as well as a calculation methodology aimed at circumventing these difficulties. JF - Transactions of the American Nuclear Society AU - Rest, Jeff AU - Yun, Di AU - Ye, Bei AU - Insepov, Zeke AD - Argonne National Laboratory, 9700 South Cass Avenue, Argonne, 11, USA jrest@anl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 353 EP - 356 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Ion implantation KW - Mathematical models KW - Implantation KW - Irradiation KW - Fuels KW - Nuclear reactor components KW - Swelling KW - Bubbles UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429875140?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nano+letters&rft.atitle=Kinetic+pathway+of+palladium+nanoparticle+sulfidation+process+at+high+temperatures.&rft.au=Liu%2C+Yi%3BSun%2C+Chengjun%3BBolin%2C+Trudy%3BWu%2C+Tianpin%3BLiu%2C+Yuzi%3BSternberg%2C+Michael%3BSun%2C+Shouheng%3BLin%2C+Xiao-Min&rft.aulast=Liu&rft.aufirst=Yi&rft.date=2013-10-09&rft.volume=13&rft.issue=10&rft.spage=4893&rft.isbn=&rft.btitle=&rft.title=Nano+letters&rft.issn=1530-6992&rft_id=info:doi/10.1021%2Fnl402768b LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 7 N1 - Last updated - 2014-04-08 ER - TY - JOUR T1 - Use of Multi-fidelity Training Data in Uncertainty Analysis of Nuclear Engineering Applications AN - 1429874761; 18278205 AB - Uncertainty analysis of computational models plays an important role in nuclear engineering due to reliance on simulation codes to augment the rare and expensive experimental data. While development of hardware and computing techniques enables models of high fidelity and resolution, the data obtained by running such codes has significant computational cost. We resolve the contradiction between the need for data, and the cost of simulation by querying the simulation code at multiple levels of fidelity and relating multi-fidelity data by statistical models. Previously, we presented elements of analysis on multi-fidelity training data. We are now demonstrating effectiveness on codes of higher complexity, with a fluid mechanics solver Nek5000 used as an example. JF - Transactions of the American Nuclear Society AU - Roderick, Oleg AU - Anitescu, Mihai AD - Argonne National Laboratory, 9700 S Cass Ave , Argonne, IL 60439 roderick@mcs.anl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 449 EP - 450 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Uncertainty KW - Mathematical models KW - Computer simulation KW - Training KW - Hardware KW - Solvers KW - Computational efficiency KW - Nuclear engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429874761?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Use+of+Multi-fidelity+Training+Data+in+Uncertainty+Analysis+of+Nuclear+Engineering+Applications&rft.au=Roderick%2C+Oleg%3BAnitescu%2C+Mihai&rft.aulast=Roderick&rft.aufirst=Oleg&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=449&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 6 N1 - Last updated - 2014-04-08 ER - TY - JOUR T1 - Definition of a Spatial Correction Factor for the Experimental Prompt Neutron Decay Constant AN - 1429867620; 18278280 AB - For deep subcritical nuclear assemblies, it is possible to use Eq. 3 to calculate the corrected experimental effective multiplication factor. The application of Eq. 3 assumes that the experimental prompt decay constant is corrected by a correction factor calculated by numerical simulations. The correction factor takes also into account the longer neutron generation time in the reflector zone. JF - Transactions of the American Nuclear Society AU - Talamo, A AU - Gohar, Y AU - Sadovich, S AU - Kiyavitskaya, H AU - Boumos, V AU - Fokov, Y AU - Routkovskaya, C AD - Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA alby@anl.gov Y1 - 2013/06// PY - 2013 DA - Jun 2013 SP - 756 EP - 758 PB - American Nuclear Society, Inc. VL - 108 SN - 0003-018X, 0003-018X KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Multiplication KW - Mathematical models KW - Computer simulation KW - Assemblies KW - Reflectors KW - Decay KW - Neutron decay KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429867620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Definition+of+a+Spatial+Correction+Factor+for+the+Experimental+Prompt+Neutron+Decay+Constant&rft.au=Talamo%2C+A%3BGohar%2C+Y%3BSadovich%2C+S%3BKiyavitskaya%2C+H%3BBoumos%2C+V%3BFokov%2C+Y%3BRoutkovskaya%2C+C&rft.aulast=Talamo&rft.aufirst=A&rft.date=2013-06-01&rft.volume=108&rft.issue=&rft.spage=756&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Number of references - 8 N1 - Last updated - 2013-09-05 ER - TY - JOUR T1 - Recrystallization and fission-gas-bubble swelling of U-Mo fuel AN - 1475540915; 18796661 AB - At high burnup, U-Mo fuel exhibits some form of recrystallization, by which fuel grains are subdivided. The effect of grain subdivision is to effectively enhance fission gas bubble (FGB) swelling due to increased grain boundaries. Inter-granular FGB swelling, i.e., FGB formation and growth at the grain boundaries, is much larger than the intra-granular FGB swelling. Recrystallized fuel volume fractions of U-Mo fuels irradiated to fission densities reaching 5.7 x 10(21) f/cm(3) were measured. Analytical expressions of recrystallization kinetics of U-Mo fuel during irradiation have been developed through the usage of the Avrami equation, a phenomenological equation which is also used to describe similar typical transformation reactions, such as new phase formation. In this work, we present a novel FGB swelling model of U-Mo fuel that is expressed in terms of Mo content, extent of cold work (fuel powder fabrication method), and fission density. JF - Journal of Nuclear Materials AU - Kirn, Yeon Soo AU - Hofman, G L AU - Cheon, J S AD - Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA, yskim@anl.gov Y1 - 2013/05// PY - 2013 DA - May 2013 SP - 14 EP - 22 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 436 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Fuels KW - Kinetics KW - Irradiation KW - Nuclear fuels KW - Radioactive materials KW - Grains KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475540915?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Recrystallization+and+fission-gas-bubble+swelling+of+U-Mo+fuel&rft.au=Kirn%2C+Yeon+Soo%3BHofman%2C+G+L%3BCheon%2C+J+S&rft.aulast=Kirn&rft.aufirst=Yeon&rft.date=2013-05-01&rft.volume=436&rft.issue=1-3&rft.spage=14&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 26 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Irradiation; Kinetics; Fuels; Radioactive materials; Nuclear fuels; Grains ER - TY - JOUR T1 - Kangite, (Sc,Ti,Al,Zr,Mg,Ca) (sub 2) O (sub 3) , a new ultra-refractory scandia mineral from the Allende Meteorite; synchrotron micro-Laue diffraction and electron backscatter diffraction AN - 1366816734; 2013-046139 AB - Kangite (IMA 2011-092), (Sc,Ti,Al,Zr,Mg,Ca,[]) (sub 2) O (sub 3) , is a new scandia mineral, occurring as micrometer-sized crystals with REE-rich perovskite and spinel in a davisite-dominant ultra-refractory inclusion from the Allende CV3 carbonaceous chondrite. The phase was characterized by SEM, EBSD, synchrotron micro-Laue diffraction, micro-Raman, and EPMA. The mean chemical composition of the type kangite is (wt%) TiO (sub 2) 36.6, Sc (sub 2) O (sub 3) 26.4, ZrO (sub 2) 11.3, Al (sub 2) O (sub 3) 7.0, Y (sub 2) O (sub 3) 5.4, CaO 3.9, MgO 3.14, Dy (sub 2) O (sub 3) 1.8, SiO (sub 2) 1.7, V (sub 2) O (sub 3) 1.31, Er (sub 2) O (sub 3) 0.92, FeO 0.8, Gd (sub 2) O (sub 3) 0.60, Ho (sub 2) O (sub 3) 0.40, Tb (sub 2) O (sub 3) 0.18, Cr (sub 2) O (sub 3) 0.09, ThO (sub 2) 0.04, O -0.3, sum 101.28, which leads to an empirical formula calculated on the basis of 3 O atoms of [(Sc (sub 0.54) Al (sub 0.16) Y (sub 0.07) V (sub 0.03) Gd (sub 0.01) Dy (sub 0.01) Er (sub 0.01) ) (super 3+) (sub Sigma 0.83) (Ti (sub 0.66) Zr (sub 0.13) ) (super 4+) (sub Sigma 0.79) (Mg (sub 0.11) Ca (sub 0.06) Fe (sub 0.02) ) (super 2+) (sub Sigma 0.19) [] (sub 0.19) ] (sub Sigma 2.00) O (sub 3) . Synchrotron micro-Laue diffraction (i.e., an energy scan by a high-flux X-ray monochromatic beam) on one type domain at submicrometer resolution revealed that kangite has a cation-deficient Ia3 bixbyite-type cubic structure. The cell parameters are a=9.842(1) Aa, V=953.3(1) Aa (super 3) , Z=16, which leads to a calculated density of 3.879 g/cm (super 3) . Kangite is a new ultra-refractory mineral, likely originating through low-temperature oxidation of a Sc-,Ti (super 3+) -enriched high-temperature condensate oxide dating to the birth of the Solar System. JF - American Mineralogist AU - Ma, Chi AU - Tschauner, Oliver AU - Beckett, John R AU - Rossman, George R AU - Liu, Wenjun Y1 - 2013/05// PY - 2013 DA - May 2013 SP - 870 EP - 878 PB - Mineralogical Society of America, Washington, DC VL - 98 IS - 5-6 SN - 0003-004X, 0003-004X KW - stony meteorites KW - X-ray diffraction data KW - space groups KW - refractory materials KW - electron diffraction data KW - unit cell KW - crystal structure KW - carbonaceous chondrites KW - CV chondrites KW - kangite KW - Allende Meteorite KW - meteorites KW - metals KW - scandium KW - oxides KW - rare earths KW - lattice parameters KW - crystal chemistry KW - chondrites KW - SEM data KW - new minerals KW - synchrotron micro-Laue diffraction data KW - formula KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1366816734?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Mineralogist&rft.atitle=Kangite%2C+%28Sc%2CTi%2CAl%2CZr%2CMg%2CCa%29+%28sub+2%29+O+%28sub+3%29+%2C+a+new+ultra-refractory+scandia+mineral+from+the+Allende+Meteorite%3B+synchrotron+micro-Laue+diffraction+and+electron+backscatter+diffraction&rft.au=Ma%2C+Chi%3BTschauner%2C+Oliver%3BBeckett%2C+John+R%3BRossman%2C+George+R%3BLiu%2C+Wenjun&rft.aulast=Ma&rft.aufirst=Chi&rft.date=2013-05-01&rft.volume=98&rft.issue=5-6&rft.spage=870&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam.2013.4290 L2 - http://ammin.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 60 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2013-06-13 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - Allende Meteorite; carbonaceous chondrites; chondrites; crystal chemistry; crystal structure; CV chondrites; electron diffraction data; formula; kangite; lattice parameters; metals; meteorites; new minerals; oxides; rare earths; refractory materials; scandium; SEM data; space groups; stony meteorites; synchrotron micro-Laue diffraction data; unit cell; X-ray diffraction data DO - http://dx.doi.org/10.2138/am.2013.4290 ER - TY - JOUR T1 - Development of DCGLs By Using Both Probabilistic and Deterministic Analyses in RESRAD (Onsite) and RESRAD-OFFSITE Codes AN - 1356926842; 17999157 AB - The Derived Concentration Guideline Levels for two building areas previously used in waste processing and storage at Argonne National Laboratory were developed using both probabilistic and deterministic radiological environmental pathway analysis. Four scenarios were considered. The two current uses considered were on-site industrial use and off-site residential use with farming. The two future uses (i.e., after an institutional control period of100 y) were on-site recreational use and on-site residential use with farming. The RESRAD-OFFSITE code was used for the current-use off-site residential/farming scenario and RESRAD (onsite) was used for the other three scenarios. Contaminants of concern were identified from the past operations conducted in the buildings and the actual characterization done at the site. Derived Concentration Guideline Levels were developed for all four scenarios using deterministic and probabilistic approaches, which include both "peak-of-the-means" and "mean-of-the-peaks" analyses. The future-use on-site residential/farming scenario resulted in the most restrictive Derived Concentration Guideline Levels for most radionuclides. JF - Health Physics AU - Kamboj, S AU - Yu, C AU - Johnson, R AD - Argonne National Laboratory, Building 240, 9700 South Cass Avenue, Argonne, IL 60439-4832, USA Y1 - 2013/05// PY - 2013 DA - May 2013 SP - S68 EP - S75 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 104 IS - 5 SN - 0017-9078, 0017-9078 KW - Pollution Abstracts; Health & Safety Science Abstracts KW - Storage KW - Recreation areas KW - Guidelines KW - Radioisotopes KW - Buildings KW - H 8000:Radiation Safety/Electrical Safety KW - P 8000:RADIATION UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1356926842?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Health+Physics&rft.atitle=Development+of+DCGLs+By+Using+Both+Probabilistic+and+Deterministic+Analyses+in+RESRAD+%28Onsite%29+and+RESRAD-OFFSITE+Codes&rft.au=Kamboj%2C+S%3BYu%2C+C%3BJohnson%2C+R&rft.aulast=Kamboj&rft.aufirst=S&rft.date=2013-05-01&rft.volume=104&rft.issue=5&rft.spage=S68&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-01 N1 - Last updated - 2014-06-12 N1 - SubjectsTermNotLitGenreText - Storage; Recreation areas; Guidelines; Radioisotopes; Buildings ER - TY - JOUR T1 - Modeling agriculture in the Community Land Model AN - 1694969862; 19775475 AB - The potential impact of climate change on agriculture is uncertain. In addition, agriculture could influence above- and below-ground carbon storage. Development of models that represent agriculture is necessary to address these impacts. We have developed an approach to integrate agriculture representations for three crop types - maize, soybean, and spring wheat - into the coupled carbon-nitrogen version of the Community Land Model (CLM), to help address these questions. Here we present the new model, CLM-Crop, validated against observations from two AmeriFlux sites in the United States, planted with maize and soybean. Seasonal carbon fluxes compared well with field measurements for soybean, but not as well for maize. CLM-Crop yields were comparable with observations in countries such as the United States, Argentina, and China, although the generality of the crop model and its lack of technology and irrigation made direct comparison difficult. CLM-Crop was compared against the standard CLM3.5, which simulates crops as grass. The comparison showed improvement in gross primary productivity in regions where crops are the dominant vegetation cover. Crop yields and productivity were negatively correlated with temperature and positively correlated with precipitation, in agreement with other modeling studies. In case studies with the new crop model looking at impacts of residue management and planting date on crop yield, we found that increased residue returned to the litter pool increased crop yield, while reduced residue returns resulted in yield decreases. Using climate controls to signal planting date caused different responses in different crops. Maize and soybean had opposite reactions: when low temperature threshold resulted in early planting, maize responded with a loss of yield, but soybean yields increased. Our improvements in CLM demonstrate a new capability in the model - simulating agriculture in a realistic way, complete with fertilizer and residue management practices. Results are encouraging, with improved representation of human influences on the land surface and the potentially resulting climate impacts. JF - Geoscientific Model Development AU - Drewniak, B AU - Song, J AU - Prell, J AU - Kotamarthi, V R AU - Jacob, R AD - Environmental Science Division, Argonne National Laboratory, 9700 S. Cass Ave, Argonne, IL 60439, USA Y1 - 2013/04/19/ PY - 2013 DA - 2013 Apr 19 SP - 495 EP - 515 PB - Copernicus, Max-Planck-Strasse 13, 37191 Katlenburg-Lindau, Germany, Phone: +49-5556-99555-0, Fax: +49-5556-99555-70, VL - 6 IS - 2 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Agriculture KW - Climate change KW - Primary production KW - Crops KW - Crop Yield KW - Vegetation cover KW - Fertilizers KW - Carbon KW - Corn KW - Modelling KW - Temperature effects KW - Litter KW - Climates KW - Irrigation KW - Temperature KW - Ecosystem disturbance KW - Model Studies KW - Soybeans KW - USA KW - Argentina KW - China, People's Rep. KW - Q2 09243:Structure, mechanics and thermodynamics KW - AQ 00001:Water Resources and Supplies KW - SW 5040:Data acquisition UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1694969862?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Discovering+Crystals+Using+Shape+Matching+and+Machine+Learning&rft.au=Phillips%2C+Carolyn%3BVoth%2C+Gregory&rft.aulast=Phillips&rft.aufirst=Carolyn&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Temperature effects; Vegetation cover; Fertilizers; Litter; Irrigation; Climate change; Primary production; Ecosystem disturbance; Modelling; Agriculture; Carbon; Climates; Corn; Temperature; Crops; Soybeans; Crop Yield; Model Studies; USA; Argentina; China, People's Rep. DO - http://dx.doi.org/10.5194/gmd-6-495-2013 ER - TY - JOUR T1 - Legacy impacts of all-time anthropogenic emissions on the global mercury cycle AN - 1438970796; 2013-077643 AB - Elevated mercury (Hg) in marine and terrestrial ecosystems is a global health concern because of the formation of toxic methylmercury. Humans have emitted Hg to the atmosphere for millennia, and this Hg has deposited and accumulated into ecosystems globally. Here we present a global biogeochemical model with fully coupled atmospheric, terrestrial, and oceanic Hg reservoirs to better understand human influence on Hg cycling and timescales for responses. We drive the model with a historical inventory of anthropogenic emissions from 2000 BC to present. Results show that anthropogenic perturbations introduced to surface reservoirs (atmosphere, ocean, or terrestrial) accumulate and persist in the subsurface ocean for decades to centuries. The simulated present-day atmosphere is enriched by a factor of 2.6 relative to 1840 levels, consistent with sediment archives, and by a factor of 7.5 relative to natural levels (2000 BC). Legacy anthropogenic Hg re-emitted from surface reservoirs accounts for 60% of present-day atmospheric deposition, compared to 27% from primary anthropogenic emissions, and 13% from natural sources. We find that only 17% of the present-day Hg in the surface ocean is natural and that half of its anthropogenic enrichment originates from pre-1950 emissions. Although Asia is presently the dominant contributor to primary anthropogenic emissions, only 17% of the surface ocean reservoir is of Asian anthropogenic origin, as compared to 30% of North American and European origin. The accumulated burden of legacy anthropogenic Hg means that future deposition will increase even if primary anthropogenic emissions are held constant. Aggressive global Hg emission reductions will be necessary just to maintain oceanic Hg concentrations at present levels. Abstract Copyright (2013), . American Geophysical Union. All Rights Reserved. JF - Global Biogeochemical Cycles AU - Amos, Helen M AU - Jacob, Daniel J AU - Streets, David G AU - Sunderland, Elsie M Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 410 EP - 421 PB - American Geophysical Union, Washington, DC VL - 27 IS - 2 SN - 0886-6236, 0886-6236 KW - toxic materials KW - terrestrial environment KW - pollutants KW - numerical analysis KW - human activity KW - global KW - pollution KW - atmosphere KW - ecosystems KW - eigenvalues KW - environmental effects KW - geochemical cycle KW - quantitative analysis KW - metals KW - marine environment KW - mercury KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1438970796?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Global+Biogeochemical+Cycles&rft.atitle=Legacy+impacts+of+all-time+anthropogenic+emissions+on+the+global+mercury+cycle&rft.au=Amos%2C+Helen+M%3BJacob%2C+Daniel+J%3BStreets%2C+David+G%3BSunderland%2C+Elsie+M&rft.aulast=Amos&rft.aufirst=Helen&rft.date=2013-04-01&rft.volume=27&rft.issue=2&rft.spage=410&rft.isbn=&rft.btitle=&rft.title=Global+Biogeochemical+Cycles&rft.issn=08866236&rft_id=info:doi/10.1002%2Fgbc.20040 L2 - http://www.agu.org/journals/gb/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2013-01-01 N1 - Number of references - 67 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2013-10-03 N1 - SubjectsTermNotLitGenreText - atmosphere; ecosystems; eigenvalues; environmental effects; geochemical cycle; global; human activity; marine environment; mercury; metals; numerical analysis; pollutants; pollution; quantitative analysis; terrestrial environment; toxic materials DO - http://dx.doi.org/10.1002/gbc.20040 ER - TY - JOUR T1 - A component-based approach to integrated modeling in the geosciences; the design of CSDMS AN - 1429844280; 2013-070205 AB - Development of scientific modeling software increasingly requires the coupling of multiple, independently developed models. Component-based software engineering enables the integration of plug-and-play components, but significant additional challenges must be addressed in any specific domain in order to produce a usable development and simulation environment that also encourages contributions and adoption by entire communities. In this paper we describe the challenges in creating a coupling environment for Earth-surface process modeling and the innovative approach that we have developed to address them within the Community Surface Dynamics Modeling System. Abstract Copyright (2013) Elsevier, B.V. JF - Computers & Geosciences AU - Peckham, Scott D AU - Hutton, Eric W H AU - Norris, Boyana Y1 - 2013/04// PY - 2013 DA - April 2013 SP - 3 EP - 12 PB - Elsevier, Amsterdam VL - 53 SN - 0098-3004, 0098-3004 KW - models KW - computer programs KW - community surface dynamics modeling system KW - geoscience KW - CSDMS KW - data processing KW - simulation KW - design KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429844280?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Computers+%26+Geosciences&rft.atitle=A+component-based+approach+to+integrated+modeling+in+the+geosciences%3B+the+design+of+CSDMS&rft.au=Peckham%2C+Scott+D%3BHutton%2C+Eric+W+H%3BNorris%2C+Boyana&rft.aulast=Peckham&rft.aufirst=Scott&rft.date=2013-04-01&rft.volume=53&rft.issue=&rft.spage=3&rft.isbn=&rft.btitle=&rft.title=Computers+%26+Geosciences&rft.issn=00983004&rft_id=info:doi/10.1016%2Fj.cageo.2012.04.002 L2 - http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5840&_auth=y&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=e5198452fad934c6346f38b57511c8e0 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 36 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2013-09-05 N1 - CODEN - GGEOD5 N1 - SubjectsTermNotLitGenreText - community surface dynamics modeling system; computer programs; CSDMS; data processing; design; geoscience; models; simulation DO - http://dx.doi.org/10.1016/j.cageo.2012.04.002 ER - TY - JOUR T1 - Assessing and monitoring semi-arid shrublands using object-based image analysis and multiple endmember spectral mixture analysis AN - 1323806904; 17769094 AB - Arid and semi-arid shrublands have significant biological and economical values and have been experiencing dramatic changes due to human activities. In California, California sage scrub (CSS) is one of the most endangered plant communities in the US and requires close monitoring in order to conserve this important biological resource. We investigate the utility of remote-sensing approaches-object-based image analysis applied to pansharpened QuickBird imagery (QBPS/OBIA) and multiple endmember spectral mixture analysis (MESMA) applied to SPOT imagery (SPOT/MESMA)-for estimating fractional cover of true shrub, subshrub, herb, and bare ground within CSS communities of southern California. We also explore the effectiveness of life-form cover maps for assessing CSS conditions. Overall and combined shrub cover (i.e., true shrub and subshrub) were estimated more accurately using QBPS/OBIA (mean absolute error or MAE, 8.9 %) than SPOT/MESMA (MAE, 11.4 %). Life-form cover from QBPS/OBIA at a 2525 m grid cell size seems most desirable for assessing CSS because of its higher accuracy and spatial detail in cover estimates and amenability to extracting other vegetation information (e.g., size, shape, and density of shrub patches). Maps derived from SPOT/MESMA at a 5050 m scale are effective for retrospective analysis of life-form cover change because their comparable accuracies to QBPS/OBIA and availability of SPOT archives data dating back to the mid-1980s. The framework in this study can be applied to other physiognomically comparable shrubland communities. JF - Environmental Monitoring and Assessment AU - Hamada, Yuki AU - Stow, Douglas A AU - Roberts, Dar A AU - Franklin, Janet AU - Kyriakidis, Phaedon C AD - Argonne National Laboratory, Argonne, IL, 60439, USA, yhamada@anl.gov Y1 - 2013/04// PY - 2013 DA - Apr 2013 SP - 3173 EP - 3190 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 185 IS - 4 SN - 0167-6369, 0167-6369 KW - Environment Abstracts KW - Shrubs KW - Semiarid environments KW - Economics KW - Vegetation KW - Endangered plants KW - USA, California KW - Human factors KW - Herbs KW - ENA 21:Wildlife UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1323806904?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Monitoring+and+Assessment&rft.atitle=Assessing+and+monitoring+semi-arid+shrublands+using+object-based+image+analysis+and+multiple+endmember+spectral+mixture+analysis&rft.au=Hamada%2C+Yuki%3BStow%2C+Douglas+A%3BRoberts%2C+Dar+A%3BFranklin%2C+Janet%3BKyriakidis%2C+Phaedon+C&rft.aulast=Hamada&rft.aufirst=Yuki&rft.date=2013-04-01&rft.volume=185&rft.issue=4&rft.spage=3173&rft.isbn=&rft.btitle=&rft.title=Environmental+Monitoring+and+Assessment&rft.issn=01676369&rft_id=info:doi/10.1007%2Fs10661-012-2781-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-04-01 N1 - Number of references - 58 N1 - Last updated - 2014-05-15 N1 - SubjectsTermNotLitGenreText - Shrubs; Semiarid environments; Economics; Vegetation; Endangered plants; Human factors; Herbs; USA, California DO - http://dx.doi.org/10.1007/s10661-012-2781-z ER - TY - CPAPER T1 - Role of Solvation Dynamics in Influencing Nanoscale Corrosion and Passive Oxide Breakdown T2 - 68th Annual Meeting of the National Association of Corrosion Engineering (CORROSION 2013) AN - 1369228279; 6214700 JF - 68th Annual Meeting of the National Association of Corrosion Engineering (CORROSION 2013) AU - Sankaranarayanan, Subramanian AU - Deshmukh, Sanket AU - Ramanathan, Shriram Y1 - 2013/03/17/ PY - 2013 DA - 2013 Mar 17 KW - Solvation KW - Corrosion KW - oxides UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1369228279?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Polyelectrolyte+Complex+Formation%3A+Structure+and+Properties&rft.au=Tirrell%2C+Matthew&rft.aulast=Tirrell&rft.aufirst=Matthew&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - http://www.nace.org/cstm/Events/Schedule.aspx?id=3c0b3545-0379-e111-ba5a-0050569a007b LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-31 N1 - Last updated - 2013-06-19 ER - TY - JOUR T1 - Complexation of neptunium(V) with Bacillus subtilis endospore surfaces and their exudates AN - 1371763035; 2013-051948 AB - The neptunyl ion is very toxic and has the potential to be highly mobile in the environment. In an effort to understand how its interactions with biological surfaces may affect its movement in the environment, we investigated neptunyl interactions with Bacillus subtilis endospores and their exudates. The exudates were dominated by dipicolinic acid. Spectrophotometric investigations of the chemical form of neptunyl in exudate solutions are consistent with the formation of 1:1 neptunyl-dipicolinate complexes. Using neptunyl-endospore adsorption data and spectrophotometric measurements of neptunyl-dipicolinate complexes, we determined thermodynamic stability constants for both species. Neptunyl adsorption onto the endospore surface decreased with an increasing pH, which corresponds to increasing aqueous complexation of neptunyl by dipicolinate. Adsorption was also highly ionic strength dependent with adsorption increasing as ionic strength decreased. With stability constants determined in this work, we compared controls on neptunyl partitioning in a simulated system with B. subtilis endospores, vegetative cells, and generic natural organic matter. Neptunyl complexation by B. subtilis endospore exudates exerted the greatest biological control in the simulated systems. Abstract Copyright (2013) Elsevier, B.V. JF - Chemical Geology AU - Gorman-Lewis, Drew AU - Jensen, Mark P AU - Harrold, Zoe R AU - Hertel, Mikaela R Y1 - 2013/03/11/ PY - 2013 DA - 2013 Mar 11 SP - 75 EP - 83 PB - Elsevier, Amsterdam VL - 341 SN - 0009-2541, 0009-2541 KW - desorption KW - neptunium KW - biomass KW - optical spectra KW - complexing KW - simulation KW - remediation KW - spectra KW - thermodynamic properties KW - chemical composition KW - mobility KW - Bacillus KW - pH KW - toxic materials KW - experimental studies KW - acids KW - Bacillus subtilis KW - pollutants KW - biochemistry KW - pollution KW - adsorption KW - bioremediation KW - models KW - spores KW - biogenic processes KW - metals KW - bacteria KW - actinides KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1371763035?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Complexation+of+neptunium%28V%29+with+Bacillus+subtilis+endospore+surfaces+and+their+exudates&rft.au=Gorman-Lewis%2C+Drew%3BJensen%2C+Mark+P%3BHarrold%2C+Zoe+R%3BHertel%2C+Mikaela+R&rft.aulast=Gorman-Lewis&rft.aufirst=Drew&rft.date=2013-03-11&rft.volume=341&rft.issue=&rft.spage=75&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2013.01.004 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 137 N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-06-27 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - acids; actinides; adsorption; Bacillus; Bacillus subtilis; bacteria; biochemistry; biogenic processes; biomass; bioremediation; chemical composition; complexing; desorption; experimental studies; metals; mobility; models; neptunium; optical spectra; pH; pollutants; pollution; remediation; simulation; spectra; spores; thermodynamic properties; toxic materials DO - http://dx.doi.org/10.1016/j.chemgeo.2013.01.004 ER - TY - JOUR T1 - Beyond the genome: community-level analysis of the microbial world AN - 1694969292; 17769475 AB - The development of culture-independent strategies to study microbial diversity and function has led to a revolution in microbial ecology, enabling us to address fundamental questions about the distribution of microbes and their influence on Earth's biogeochemical cycles. This article discusses some of the progress that scientists have made with the use of so-called "omic" techniques (metagenomics, metatranscriptomics, and metaproteomics) and the limitations and major challenges these approaches are currently facing. These 'omic methods have been used to describe the taxonomic structure of microbial communities in different environments and to discover new genes and enzymes of industrial and medical interest. However, microbial community structure varies in different spatial and temporal scales and none of the 'omic techniques are individually able to elucidate the complex aspects of microbial communities and ecosystems. In this article we highlight the importance of a spatiotemporal sampling design, together with a multilevel 'omic approach and a community analysis strategy (association networks and modeling) to examine and predict interacting microbial communities and their impact on the environment. JF - Biology and Philosophy AU - Zarraonaindia, Iratxe AU - Smith, Daniel P AU - Gilbert, Jack A AD - Argonne National Laboratory, Institute for Genomic and Systems Biology, 9700 South Cass Avenue, Argonne, IL, 60439, USA, iratxe@anl.gov Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 261 EP - 282 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 28 IS - 2 SN - 0169-3867, 0169-3867 KW - Biotechnology and Bioengineering Abstracts; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Genomes KW - Community structure KW - Enzymes KW - Sampling KW - Philosophy KW - A 01450:Environmental Pollution & Waste Treatment KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1694969292?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biology+and+Philosophy&rft.atitle=Beyond+the+genome%3A+community-level+analysis+of+the+microbial+world&rft.au=Zarraonaindia%2C+Iratxe%3BSmith%2C+Daniel+P%3BGilbert%2C+Jack+A&rft.aulast=Zarraonaindia&rft.aufirst=Iratxe&rft.date=2013-03-01&rft.volume=28&rft.issue=2&rft.spage=261&rft.isbn=&rft.btitle=&rft.title=Biology+and+Philosophy&rft.issn=01693867&rft_id=info:doi/10.1007%2Fs10539-012-9357-8 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-07-01 N1 - Number of references - 110 N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Genomes; Community structure; Enzymes; Philosophy; Sampling DO - http://dx.doi.org/10.1007/s10539-012-9357-8 ER - TY - JOUR T1 - Decadal cycling within long-lived carbon pools revealed by dual isotopic analysis of mineral-associated soil organic matter AN - 1673366544; 2015-034905 AB - Long-lived soil organic matter (SOM) pools are critical for the global carbon (C) cycle, but challenges in isolating such pools have inhibited understanding of their dynamics. We physically isolated particulate (>53 mu m), silt-, and clay-sized organic matter from soils collected over two decades from a perennial C (sub 3) grassland established on long-term agricultural soil with a predominantly C (sub 4) isotopic signature. Silt- and clay-sized fractions were then subjected to a sequential chemical fractionation (acid hydrolysis followed by peroxide oxidation) to isolate long-lived C pools. We quantified (super 14) C and the natural (super 13) C isotopic label in the resulting fractions to identify and evaluate pools responsible for long-lived SOM. After removal of particulate organic matter ( approximately 14% of bulk soil C) sequential chemical treatment removed 80% of mineral-associated C. In all mineral-associated fractions, at least 55% of C (sub 4) -derived C was retained 32 years after the switch to C (sub 3) inputs. However, C (sub 3) -C increased substantially beginning approximately 25 years after the switch. Radiocarbon-based turnover times ranged from roughly 1200-3000 years for chemically resistant mineral-associated pools, although some pools turned over faster under C (sub 3) grassland than in a reference agricultural field, indicating that new material had entered some pools as early as 14 years after the vegetation switch. These findings provide further evidence that SOM chemistry does not always reflect SOM longevity and resistance to microbial decomposition. Even measureable SOM fractions that have extremely long mean turnover times (>1500 years) can have a substantial component that is dynamic over much shorter timescales. Copyright 2013 Springer Science+Business Media Dordrecht and 2011 Springer Science+Business Media B.V. JF - Biogeochemistry (Dordrecht) AU - O'Brien, Sarah L AU - Jastrow, Julie D AU - McFarlane, Karis J AU - Guilderson, Thomas P AU - Gonzalez-Meler, Miquel A Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 111 EP - 125 PB - Springer, Dordrecht - Boston - Lancaster VL - 112 IS - 1-3 SN - 0168-2563, 0168-2563 KW - United States KW - Batavia Illinois KW - Kane County Illinois KW - isotope fractionation KW - decadal variations KW - degradation KW - isotopes KW - vegetation KW - stable isotopes KW - Argiudolls KW - nitrogen KW - ecalcitrance KW - radioactive isotopes KW - carbon KW - soils KW - Illinois KW - isotope ratios KW - C3 plants KW - oxidation KW - cyclic processes KW - C-13/C-12 KW - Prairie Peninsula KW - geochemical cycle KW - organic compounds KW - C4 plants KW - carbon cycle KW - C-14 KW - Mollisols KW - chemical fractionation KW - 02D:Isotope geochemistry KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673366544?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biogeochemistry+%28Dordrecht%29&rft.atitle=Decadal+cycling+within+long-lived+carbon+pools+revealed+by+dual+isotopic+analysis+of+mineral-associated+soil+organic+matter&rft.au=O%27Brien%2C+Sarah+L%3BJastrow%2C+Julie+D%3BMcFarlane%2C+Karis+J%3BGuilderson%2C+Thomas+P%3BGonzalez-Meler%2C+Miquel+A&rft.aulast=O%27Brien&rft.aufirst=Sarah&rft.date=2013-03-01&rft.volume=112&rft.issue=1-3&rft.spage=111&rft.isbn=&rft.btitle=&rft.title=Biogeochemistry+%28Dordrecht%29&rft.issn=01682563&rft_id=info:doi/10.1007%2Fs10533-011-9673-0 L2 - http://www.springerlink.com/content/100244/ LA - English DB - GeoRef N1 - Conference title - Organic matter stabilization and ecosystem functions N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2015-01-01 N1 - Number of references - 66 N1 - Document feature - illus. incl. 5 tables N1 - Last updated - 2015-04-16 N1 - SubjectsTermNotLitGenreText - Argiudolls; Batavia Illinois; C-13/C-12; C-14; C3 plants; C4 plants; carbon; carbon cycle; chemical fractionation; cyclic processes; decadal variations; degradation; ecalcitrance; geochemical cycle; Illinois; isotope fractionation; isotope ratios; isotopes; Kane County Illinois; Mollisols; nitrogen; organic compounds; oxidation; Prairie Peninsula; radioactive isotopes; soils; stable isotopes; United States; vegetation DO - http://dx.doi.org/10.1007/s10533-011-9673-0 ER - TY - JOUR T1 - Mechanically alloyed composite anode materials based on SiO-Sn sub(x)Fe sub(y)C sub(z) for Li-ion batteries AN - 1671408494; 18158599 AB - A new family of composite materials as anodes for lithium-ion batteries, SiO-Sn sub(x)Fe sub(y)C sub(z) (x : y : z molar ratio), was synthesized by mechanical alloying. SiO is preferable because of its high capacity and the Sn-Fe-C alloys could be used as a buffer material to extend the cycle life of cells. Rather than expensive and toxic cobalt, we selected cheap and environmentally benign iron instead. The aim of this work is to find the optimal point by tuning the composition of Sn-Fe-C in the hope of obtaining better electrochemical performance. Different combinations were studied by high-energy X-ray diffraction and electrochemical methods. The results indicated that carbon can improve the cycle life, the amount of iron affects phase formation greatly, and the FeSn sub(2) phase should be avoided because of its detrimental effect on cycle life. The 50 wt% SiO-50 wt% Sn sub(30)Fe sub(30)C sub(4 0) composition was studied using the pair distribution function and Mossbauer spectroscopy. This material exhibits high specific capacity (900 mA h g super(-1) at C/6 rate) with good cycle life and rate capability. These results indicate that SiO-Sn sub(x)Fe sub(y)C sub(z) are promising candidate anode materials for commercial rechargeable lithium batteries. JF - Journal of materials chemistry. A, Materials for energy and sustainability AU - Liu, Bo AU - Abouimrane, Ali AU - Brown, Dennis E AU - Zhang, Xiaofeng AU - Ren, Yang AU - Fang, Zhigang Zak AU - Amine, Khalil AD - Chemical Sciences and Engineering Division; Argonne National Laboratory; Argonne; Illinois; USA Abouimrane@anl.gov PY - 2013 SP - 4376 EP - 4382 PB - Royal Society of Chemistry VL - 1 IS - 13 SN - 2050-7488, 2050-7488 KW - Solid State and Superconductivity Abstracts (SO); METADEX (MD); Advanced Polymers Abstracts (EP); Environmental Engineering Abstracts (EN); Composites Industry Abstracts (ED); Engineered Materials Abstracts, Ceramics (EC) KW - Composite materials KW - Carbon KW - Mechanical alloying KW - Tuning KW - Anodes KW - Lithium batteries KW - Iron KW - Sustainability KW - Silicon dioxide UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671408494?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.atitle=Mechanically+alloyed+composite+anode+materials+based+on+SiO-Sn+sub%28x%29Fe+sub%28y%29C+sub%28z%29+for+Li-ion+batteries&rft.au=Liu%2C+Bo%3BAbouimrane%2C+Ali%3BBrown%2C+Dennis+E%3BZhang%2C+Xiaofeng%3BRen%2C+Yang%3BFang%2C+Zhigang+Zak%3BAmine%2C+Khalil&rft.aulast=Liu&rft.aufirst=Bo&rft.date=2013-03-01&rft.volume=1&rft.issue=13&rft.spage=4376&rft.isbn=&rft.btitle=&rft.title=Journal+of+materials+chemistry.+A%2C+Materials+for+energy+and+sustainability&rft.issn=20507488&rft_id=info:doi/10.1039%2Fc3ta00101f LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-07-01 N1 - Number of references - 21 N1 - Last updated - 2016-01-06 DO - http://dx.doi.org/10.1039/c3ta00101f ER - TY - JOUR T1 - Ultrasound Assisted Design of Sulfur/Carbon Cathodes with Partially Fluorinated Ether Electrolytes for Highly Efficient Li/S Batteries AN - 1439757270; 18478364 AB - A one-step, eco-friendly ultrasound-assisted process is established for the rapid synthesis of sulfur-carbon composite cathode materials, avoiding the widely used, energy inefficient "melt-down" process for Li-S batteries. It is demonstrated that, without inserting sulfur into pores of carbon, the coulombic efficiency of SC/Li cell in the new DOL/D2 electrolyte is greater than 96% for 100 cycles, which is far superior to the reported numerous electrolyte formulations. JF - Advanced Materials AU - Weng, Wei AU - Pol, Vilas G AU - Amine, Khalil AD - Electrochemical Energy Storage Department, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA., pol@anl.gov Y1 - 2013/03// PY - 2013 DA - Mar 2013 SP - 1608 EP - 1615 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 25 IS - 11 SN - 0935-9648, 0935-9648 KW - Biotechnology and Bioengineering Abstracts KW - lithium-sulfur battery KW - ultrasound-assisted synthesis KW - fluorinated ether electrolyte KW - Cathodes KW - Sulfur KW - Pores KW - Carbon KW - Energy KW - Ethers KW - Ultrasound KW - W 30910:Imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1439757270?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advanced+Materials&rft.atitle=Ultrasound+Assisted+Design+of+Sulfur%2FCarbon+Cathodes+with+Partially+Fluorinated+Ether+Electrolytes+for+Highly+Efficient+Li%2FS+Batteries&rft.au=Weng%2C+Wei%3BPol%2C+Vilas+G%3BAmine%2C+Khalil&rft.aulast=Weng&rft.aufirst=Wei&rft.date=2013-03-01&rft.volume=25&rft.issue=11&rft.spage=1608&rft.isbn=&rft.btitle=&rft.title=Advanced+Materials&rft.issn=09359648&rft_id=info:doi/10.1002%2Fadma.201204051 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Sulfur; Cathodes; Pores; Carbon; Energy; Ethers; Ultrasound DO - http://dx.doi.org/10.1002/adma.201204051 ER - TY - JOUR T1 - Offshore Wind Turbine Visibility and Visual Impact Threshold Distances AN - 1367492236; 18083873 AB - Potential visual impact on coastal lands has emerged as a major concern in the development of offshore wind facilities in the United States and Europe. Optimal siting of offshore facilities requires accurate knowledge of the relationship between distance and the visibility of wind turbines. Past assessments of offshore wind turbine visibility were based on smaller turbines and facilities in use at the time and underestimate visibility for current projects, which use more and larger larger turbines. This study is a preliminary assessment of the visibility of offshore wind facilities in the United Kingdom. Study objectives included identifying the maximum distances the facilities could be seen in both daytime and nighttime views and assessing the effect of distance on visual contrasts associated with the facilities. Results showed that small to moderately sized facilities were visible to the unaided eye at distances greater than 42 km [26 miles (mi)], with turbine blade movement visible up to 39 km (24 mi). At night, aerial hazard navigation lighting was visible at distances greater than 39 km (24 mi). The observed wind facilities were judged to be a major focus of visual attention at distances up to 16 km (10 mi), were noticeable to casual observers at distances of almost 29 km (18 mi), and were visible with extended or concentrated viewing at distances beyond 40 km (25 mi). Environmental Practice 15:33-49 (2013) JF - Environmental Practice AU - Sullivan, Robert G AU - Kirchler, Leslie B AU - Cothren, Jackson AU - Winters, Snow L AD - Environmental Science Division, Argonne National Laboratory, Argonne, Illinois, sullivan@anl.gov Y1 - 2013/03// PY - 2013 DA - March 2013 SP - 33 EP - 49 PB - Cambridge University Press, The Edinburgh Building, Cambridge CB2 2RU United Kingdom VL - 15 IS - 1 SN - 1466-0466, 1466-0466 KW - Meteorological & Geoastrophysical Abstracts; Oceanic Abstracts; Sustainability Science Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Lighting KW - Europe KW - Navigation KW - Wind turbines KW - Hazards KW - Turbines KW - USA KW - Wind energy KW - ANE, Europe KW - Visibility KW - O 2010:Physical Oceanography KW - Q2 09387:Navigation KW - M2 551.55:Wind (551.55) KW - M3 1010:Issues in Sustainable Development KW - ENA 12:Oceans & Estuaries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1367492236?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Separations+of+Organic+Acids+From+Pyrolysis+Bio-Oil&rft.au=Lin%2C+Yupo%3BSather%2C+Norman%3BLibera%2C+Joseph%3BSnyder%2C+Seth&rft.aulast=Lin&rft.aufirst=Yupo&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-06-01 N1 - Number of references - 8 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Hazards; Turbines; Visibility; Wind turbines; Wind energy; Lighting; Navigation; USA; ANE, Europe; Europe DO - http://dx.doi.org/10.1017/S1466046612000464 ER - TY - JOUR T1 - New sub-family of lysozyme-like proteins shows no catalytic activity: crystallographic and biochemical study of STM3605 protein from Salmonella Typhimurium AN - 1352289386; 17969634 AB - Phage viruses that infect prokaryotes integrate their genome into the host chromosome; thus, microbial genomes typically contain genetic remnants of both recent and ancient phage infections. Often phage genes occur in clusters of atypical G+C content that reflect integration of the foreign DNA. However, some phage genes occur in isolation without other phage gene neighbors, probably resulting from horizontal gene transfer. In these cases, the phage gene product is unlikely to function as a component of a mature phage particle, and instead may have been co-opted by the host for its own benefit. The product of one such gene from Salmonella enterica serovar Typhimurium, STM3605, encodes a protein with modest sequence similarity to phage-like lysozyme (N-acetylmuramidase) but appears to lack essential catalytic residues that are strictly conserved in all lysozymes. Close homologs in other bacteria share this characteristic. The structure of the STM3605 protein was characterized by X-ray crystallography, and functional assays showed that it is a stable, folded protein whose structure closely resembles lysozyme. However, this protein is unlikely to hydrolyze peptidoglycan. Instead, STM3605 is presumed to have evolved an alternative function because it shows some lytic activity and partitions to micelles. JF - Journal of Structural and Functional Genomics AU - Michalska, Karolina AU - Brown, Roslyn N AU - Li, Hui AU - Jedrzejczak, Robert AU - Niemann, George S AU - Heffron, Fred AU - Cort, John R AU - Adkins, Joshua N AU - Babnigg, Gyorgy AU - Joachimiak, Andrzej AD - The Midwest Center for Structural Genomics, Biosciences Division, Argonne National Laboratory, Argonne, IL, USA, Joshua.Adkins@pnnl.gov Y1 - 2013/03// PY - 2013 DA - Mar 2013 SP - 1 EP - 10 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 14 IS - 1 SN - 1345-711X, 1345-711X KW - Virology & AIDS Abstracts; Microbiology Abstracts B: Bacteriology; Biotechnology and Bioengineering Abstracts; Genetics Abstracts KW - Chromosomes KW - Phages KW - Salmonella enterica KW - W 30905:Medical Applications KW - J 02430:Symbiosis, Antibiosis & Phages KW - V 22310:Genetics, Taxonomy & Structure KW - G 07760:Viruses & Phages UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1352289386?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Structural+and+Functional+Genomics&rft.atitle=New+sub-family+of+lysozyme-like+proteins+shows+no+catalytic+activity%3A+crystallographic+and+biochemical+study+of+STM3605+protein+from+Salmonella+Typhimurium&rft.au=Michalska%2C+Karolina%3BBrown%2C+Roslyn+N%3BLi%2C+Hui%3BJedrzejczak%2C+Robert%3BNiemann%2C+George+S%3BHeffron%2C+Fred%3BCort%2C+John+R%3BAdkins%2C+Joshua+N%3BBabnigg%2C+Gyorgy%3BJoachimiak%2C+Andrzej&rft.aulast=Michalska&rft.aufirst=Karolina&rft.date=2013-03-01&rft.volume=14&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Journal+of+Structural+and+Functional+Genomics&rft.issn=1345711X&rft_id=info:doi/10.1007%2Fs10969-013-9151-0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-01 N1 - Number of references - 1 N1 - Last updated - 2014-02-11 N1 - SubjectsTermNotLitGenreText - Phages; Salmonella enterica DO - http://dx.doi.org/10.1007/s10969-013-9151-0 ER - TY - JOUR T1 - GH1-family 6-P- beta -glucosidases from human microbiome lactic acid bacteria AN - 1348481552; 17872779 AB - In lactic acid bacteria and other bacteria, carbohydrate uptake is mostly governed by phosphoenolpyruvate-dependent phosphotransferase systems (PTSs). PTS-dependent translocation through the cell membrane is coupled with phosphorylation of the incoming sugar. After translocation through the bacterial membrane, the beta -glycosidic bond in 6'-P- beta -glucoside is cleaved, releasing 6-P- beta -glucose and the respective aglycon. This reaction is catalyzed by 6-P- beta -glucosidases, which belong to two glycoside hydrolase (GH) families: GH1 and GH4. Here, the high-resolution crystal structures of GH1 6-P- beta -glucosidases from Lactobacillus plantarum (LpPbg1) and Streptococcus mutans (SmBgl) and their complexes with ligands are reported. Both enzymes show hydrolytic activity towards 6'-P- beta -glucosides. The LpPbg1 structure has been determined in an apo form as well as in a complex with phosphate and a glucose molecule corresponding to the aglycon molecule. The S. mutans homolog contains a sulfate ion in the phosphate-dedicated subcavity. SmBgl was also crystallized in the presence of the reaction product 6-P- beta -glucose. For a mutated variant of the S. mutans enzyme (E375Q), the structure of a 6'-P-salicin complex has also been determined. The presence of natural ligands enabled the definition of the structural elements that are responsible for substrate recognition during catalysis. JF - Acta Crystallographica Section D AU - Michalska, Karolina AU - Tan, Kemin AU - Li, Hui AU - Hatzos-Skintges, Catherine AU - Bearden, Jessica AU - Babnigg, Gyorgy AU - Joachimiak, Andrzej AD - Midwest Center for Structural Genomics, Biosciences Division, Argonne National Laboratory, Argonne, Illinois, USA Y1 - 2013/03/01/ PY - 2013 DA - 2013 Mar 01 SP - 451 EP - 463 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 69 IS - 3 SN - 0907-4449, 0907-4449 KW - Microbiology Abstracts B: Bacteriology KW - Sugar KW - Growth hormone KW - Lactobacillus plantarum KW - Glucose KW - Enzymes KW - phosphotransferase KW - Lactic acid bacteria KW - Sulfate KW - Cell membranes KW - Phosphate KW - Phosphorylation KW - Crystal structure KW - glycoside hydrolase KW - Carbohydrates KW - Streptococcus mutans KW - Translocation KW - Catalysis KW - J 02330:Biochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1348481552?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Acta+Crystallographica+Section+D&rft.atitle=GH1-family+6-P-+beta+-glucosidases+from+human+microbiome+lactic+acid+bacteria&rft.au=Michalska%2C+Karolina%3BTan%2C+Kemin%3BLi%2C+Hui%3BHatzos-Skintges%2C+Catherine%3BBearden%2C+Jessica%3BBabnigg%2C+Gyorgy%3BJoachimiak%2C+Andrzej&rft.aulast=Michalska&rft.aufirst=Karolina&rft.date=2013-03-01&rft.volume=69&rft.issue=3&rft.spage=451&rft.isbn=&rft.btitle=&rft.title=Acta+Crystallographica+Section+D&rft.issn=09074449&rft_id=info:doi/10.1107%2FS0907444912049608 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-01 N1 - Document feature - figure 0 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Sugar; Growth hormone; Glucose; Enzymes; Lactic acid bacteria; phosphotransferase; Sulfate; Cell membranes; Phosphorylation; Phosphate; Crystal structure; glycoside hydrolase; Carbohydrates; Translocation; Catalysis; Lactobacillus plantarum; Streptococcus mutans DO - http://dx.doi.org/10.1107/S0907444912049608 ER - TY - JOUR T1 - Meeting world's most stringent Hg criterion: a pilot-study for the treatment of oil refinery wastewater using an ultrafiltration membrane process AN - 1324955117; 4425869 AB - A membrane ultrafiltration (UF) technology was tested using an oil refinery's end-of-pipe effluent to demonstrate the proof of concept, i.e. can the Great Lakes Initiative criterion of less than 1.3 ppt be consistently met at the pilot-scale, and to provide the data necessary for preliminary full-scale process design. This study presents the successful pilot test conducted with continuous but varying feed conditions over a protracted period. The UF membrane process consistently provided a constant permeate quality at all tested operating conditions, virtually independent of the feed water characteristics and the feed Hg concentration (0.5-22.7 ppt). The treatment target of less than 1.3 ppt of Hg was met and exceeded for all tested conditions during the pilot study. Turbidity measurements were <0.5 NTU (with a MDL of 0.5 NTU) 85% of the time and <0.16 NTU 95% of the time when analyzed on-line. The TMP values were below the specification of (negative) 7-12 psi at all tested conditions during the pilot-study. Weekly maintenance cleans and monthly clean in place (CIP) events were very effective in consistently restoring the membrane permeability during the pilot-study. All rights reserved, Elsevier JF - Journal of environmental management AU - Gillenwater, Patricia S AU - Nnanna, A.G. Agwu AU - Yu, Jinsong AU - Urgun-Demirtas, Meltem AU - Negri, M Cristina AD - Argonne National Laboratory ; Purdue University Y1 - 2013/03// PY - 2013 DA - Mar 2013 SP - 65 EP - 75 VL - 117 SN - 0301-4797, 0301-4797 KW - Economics KW - Pilot surveys KW - Quality of work KW - Environmental management KW - Oil refining KW - Environmental protection KW - Waste management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1324955117?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aibss&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+management&rft.atitle=Meeting+world%27s+most+stringent+Hg+criterion%3A+a+pilot-study+for+the+treatment+of+oil+refinery+wastewater+using+an+ultrafiltration+membrane+process&rft.au=Gillenwater%2C+Patricia+S%3BNnanna%2C+A.G.+Agwu%3BYu%2C+Jinsong%3BUrgun-Demirtas%2C+Meltem%3BNegri%2C+M+Cristina&rft.aulast=Gillenwater&rft.aufirst=Patricia&rft.date=2013-03-01&rft.volume=117&rft.issue=&rft.spage=65&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+management&rft.issn=03014797&rft_id=info:doi/10.1016%2Fj.jenvman.2012.12.011 LA - English DB - International Bibliography of the Social Sciences (IBSS) N1 - Date revised - 2013-06-12 N1 - Last updated - 2013-09-16 N1 - SubjectsTermNotLitGenreText - 4330 7625; 8902 10688; 9542 12429; 13463 7625; 10527; 4339 DO - http://dx.doi.org/10.1016/j.jenvman.2012.12.011 ER - TY - JOUR T1 - Bacillus anthracis Acetyltransferases PatA1 and PatA2 Modify the Secondary Cell Wall Polysaccharide and Affect the Assembly of S-Layer Proteins AN - 1315626147; 17709871 AB - The envelope of Bacillus anthracis encompasses a proteinaceous S-layer with two S-layer proteins (Sap and EA1). Protein assembly in the envelope of B. anthracis requires S-layer homology domains (SLH) within S-layer proteins and S-layer-associated proteins (BSLs), which associate with the secondary cell wall polysaccharide (SCWP), an acetylated carbohydrate that is tethered to peptidoglycan. Here, we investigated the contributions of two putative acetyltransferases, PatA1 and PatA2, on SCWP acetylation and S-layer assembly. We show that mutations in patA1 and patA2 affect the chain lengths of B. anthracis vegetative forms and perturb the deposition of the BslO murein hydrolase at cell division septa. The patA1 and patA2 mutants are defective for the assembly of EA1 in the envelope but retain the ability of S-layer formation with Sap. SCWP isolated from the patA1 patA2 mutant lacked acetyl moieties identified in wild-type polysaccharide and failed to associate with the SLH domains of EA1. A model is discussed whereby patA1- and patA2-mediated acetylation of SCWP enables the deposition of EA1 as well as BslO near the septal region of the B. anthracis envelope. JF - Journal of Bacteriology AU - Lunderberg, J Mark AU - Nguyen-Mau, Sao-Mai AU - Richter, G Stefan AU - Wang, Ya-Ting AU - Dworkin, Jonathan AU - Missiakas, Dominique M AU - Schneewind, Olaf AD - Howard Taylor Ricketts Laboratory, Argonne National Laboratory, Argonne, Illinois, USA, OlafSchneewind,oschnee{at}bsd.uchicago.edu. Y1 - 2013/03// PY - 2013 DA - Mar 2013 SP - 977 EP - 989 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 United States VL - 195 IS - 5 SN - 0021-9193, 0021-9193 KW - Water Resources Abstracts; Aqualine Abstracts; Microbiology Abstracts B: Bacteriology KW - peptidoglycans KW - Bacillus anthracis KW - Polysaccharides KW - Envelopes KW - Acetyltransferase KW - Carbohydrates KW - Septum KW - Bacillus KW - Murein KW - SAP protein KW - Model Studies KW - hydrolase KW - Acetylation KW - Cell division KW - Homology KW - Proteins KW - Deposition KW - Mutation KW - Cell walls KW - SW 5010:Network design KW - AQ 00008:Effects of Pollution KW - J 02320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1315626147?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Bacteriology&rft.atitle=Bacillus+anthracis+Acetyltransferases+PatA1+and+PatA2+Modify+the+Secondary+Cell+Wall+Polysaccharide+and+Affect+the+Assembly+of+S-Layer+Proteins&rft.au=Lunderberg%2C+J+Mark%3BNguyen-Mau%2C+Sao-Mai%3BRichter%2C+G+Stefan%3BWang%2C+Ya-Ting%3BDworkin%2C+Jonathan%3BMissiakas%2C+Dominique+M%3BSchneewind%2C+Olaf&rft.aulast=Lunderberg&rft.aufirst=J&rft.date=2013-03-01&rft.volume=195&rft.issue=5&rft.spage=977&rft.isbn=&rft.btitle=&rft.title=Journal+of+Bacteriology&rft.issn=00219193&rft_id=info:doi/10.1128%2FJB.01274-12 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-03-01 N1 - Number of references - 43 N1 - Last updated - 2014-05-15 N1 - SubjectsTermNotLitGenreText - Murein; SAP protein; peptidoglycans; Polysaccharides; hydrolase; Acetylation; Cell division; Envelopes; Acetyltransferase; Homology; Septum; Carbohydrates; Mutation; Cell walls; Deposition; Proteins; Bacillus; Model Studies; Bacillus anthracis DO - http://dx.doi.org/10.1128/JB.01274-12 ER - TY - JOUR T1 - Noble gas radionuclides in Yellowstone geothermal gas emissions; a reconnaissance AN - 1316374674; 2013-026804 AB - A reconnaissance investigation of noble gas radionuclides ( (super 39) Ar, (super 81) Kr, and (super 85) Kr) in gas emissions from several geothermal features at Yellowstone National Park was performed to explore tracer applications of these nuclides in an active hydrothermal system. Prior studies of the Yellowstone system using stable noble gas isotopes show that the thermal fluids contain a mixture of atmospheric, mantle, and crustal components. Noble gas radionuclide measurements provide complementary chronometric information regarding subsurface residence times of thermal fluids, from decay of (super 81) Kr and (super 85) Kr as well as in situ production and release of nucleogenic (super 39) Ar and radiogenic (super 40) Ar* in the reservoir rock. Argon-39 isotopic abundances in air-corrected samples exceed those of atmospheric Ar by 705 to 1217%, indicating substantial Ar contribution to thermal fluids by fluid-rock interaction. Upper limits on deep thermal fluid mean residence times, estimated from (super 39) Ar/ (super 40) Ar* ratios, are about 100kyr for features in the Gibbon and Norris Geyser Basin areas, and is about 30kyr in Lower Geyser Basin, with the key assumption that the fluid acquires its crustal component of Ar in Quaternary volcanic rock of the Yellowstone Caldera. Input of crustal Ar from older aquifer rocks would reduce these apparent mean residence times. (super 81) Kr isotopic abundances in the gas samples yield upper limits on residence time that are consistent with those obtained from (super 39) Ar/ (super 40) Ar* ratios. Abstract Copyright (2013) Elsevier, B.V. JF - Chemical Geology AU - Yokochi, R AU - Sturchio, N C AU - Purtschert, R AU - Jiang, W AU - Lu, Z T AU - Mueller, P AU - Yang, G M AU - Kennedy, B M AU - Kharaka, Y Y1 - 2013/02/15/ PY - 2013 DA - 2013 Feb 15 SP - 43 EP - 51 PB - Elsevier, Amsterdam VL - 339 SN - 0009-2541, 0009-2541 KW - United States KW - volcanic rocks KW - isotopes KW - igneous rocks KW - gas chromatograms KW - fluid phase KW - Gibbon Geyser KW - stable isotopes KW - reservoir rocks KW - ground water KW - Ar-39 KW - Cenozoic KW - Ar-40/Ar-39 KW - Kr-85 KW - radioactive isotopes KW - geothermal systems KW - noble gases KW - Yellowstone National Park KW - tracers KW - geysers KW - springs KW - Norris Geyser KW - chemical composition KW - Ar/Ar KW - Quaternary KW - isotope ratios KW - krypton KW - thermal waters KW - Montana KW - argon KW - Kr-81 KW - chromatograms KW - residence time KW - northwestern Montana KW - mathematical methods KW - hot springs KW - 21:Hydrogeology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1316374674?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Noble+gas+radionuclides+in+Yellowstone+geothermal+gas+emissions%3B+a+reconnaissance&rft.au=Yokochi%2C+R%3BSturchio%2C+N+C%3BPurtschert%2C+R%3BJiang%2C+W%3BLu%2C+Z+T%3BMueller%2C+P%3BYang%2C+G+M%3BKennedy%2C+B+M%3BKharaka%2C+Y&rft.aulast=Yokochi&rft.aufirst=R&rft.date=2013-02-15&rft.volume=339&rft.issue=&rft.spage=43&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2012.09.037 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 58 N1 - Document feature - illus. incl. 4 tables, sketch map N1 - Last updated - 2013-03-14 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - Ar-39; Ar-40/Ar-39; Ar/Ar; argon; Cenozoic; chemical composition; chromatograms; fluid phase; gas chromatograms; geothermal systems; geysers; Gibbon Geyser; ground water; hot springs; igneous rocks; isotope ratios; isotopes; Kr-81; Kr-85; krypton; mathematical methods; Montana; noble gases; Norris Geyser; northwestern Montana; Quaternary; radioactive isotopes; reservoir rocks; residence time; springs; stable isotopes; thermal waters; tracers; United States; volcanic rocks; Yellowstone National Park DO - http://dx.doi.org/10.1016/j.chemgeo.2012.09.037 ER - TY - CPAPER T1 - Simulations of Compression Ignition Engines with Detailed Chemistry and Spray Models T2 - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AN - 1369227331; 6213433 JF - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AU - Som, Sibendu Y1 - 2013/02/14/ PY - 2013 DA - 2013 Feb 14 KW - Sprays KW - Simulation KW - Models KW - Compression UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1369227331?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.atitle=Comparison+of+Different+Gravure+Cell+Geometries+Using+a+Potential+Energy+Framework&rft.au=Boelens%2C+Arnout%3Bde+Pablo%2C+Juan&rft.aulast=Boelens&rft.aufirst=Arnout&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ L2 - http://aaas.confex.com/aaas/2013/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-31 N1 - Last updated - 2013-06-19 ER - TY - CPAPER T1 - Current Challenges in Computational Kinetics for Predictive Modeling T2 - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AN - 1369227246; 6213429 JF - 2013 Annual Meeting of the American Association for the Advancement of Science (AAAS 2013) AU - Klippenstein, Stephen Y1 - 2013/02/14/ PY - 2013 DA - 2013 Feb 14 KW - Prediction KW - Kinetics KW - Prediction models KW - Computer applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1369227246?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.atitle=Current+Challenges+in+Computational+Kinetics+for+Predictive+Modeling&rft.au=Klippenstein%2C+Stephen&rft.aulast=Klippenstein&rft.aufirst=Stephen&rft.date=2013-02-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Association+for+the+Advancement+of+Science+%28AAAS+2013%29&rft.issn=&rft_id=info:doi/ L2 - http://aaas.confex.com/aaas/2013/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-31 N1 - Last updated - 2013-06-19 ER - TY - JOUR T1 - A generic approach for the synthesis of dimer nanoclusters and asymmetric nanoassemblies. AN - 1287888132; 23346956 AB - Controlled assembly of nanoparticles into asymmetric configurations is of great interest due to their novel properties and promising applications. In this Article, we report a generic strategy for the synthesis of dimer nanoclusters and asymmetric nanoassemblies by using magnetic colloidal substrates, on which tailored surface modification and controlled physical confinement are applied. The modularity of our approach facilitates the fabrication of asymmetric nanostructures with varying sizes, shapes, compositions, surface chemistry, and surface hydrophobicity. Success in the syntheses sheds a light on the versatility of our strategy in rationally designing and synthesizing asymmetric nanostructures with tailored properties and functionalities. JF - Journal of the American Chemical Society AU - Hu, Yongxing AU - Sun, Yugang AD - Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA. Y1 - 2013/02/13/ PY - 2013 DA - 2013 Feb 13 SP - 2213 EP - 2221 VL - 135 IS - 6 KW - Colloids KW - 0 KW - Gold KW - 7440-57-5 KW - Silicon Dioxide KW - 7631-86-9 KW - Ferrosoferric Oxide KW - XM0M87F357 KW - Index Medicus KW - Colloids -- chemistry KW - Ferrosoferric Oxide -- chemistry KW - Particle Size KW - Dimerization KW - Gold -- chemistry KW - Silicon Dioxide -- chemistry KW - Colloids -- chemical synthesis KW - Surface Properties KW - Metal Nanoparticles -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1287888132?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+American+Chemical+Society&rft.atitle=A+generic+approach+for+the+synthesis+of+dimer+nanoclusters+and+asymmetric+nanoassemblies.&rft.au=Hu%2C+Yongxing%3BSun%2C+Yugang&rft.aulast=Hu&rft.aufirst=Yongxing&rft.date=2013-02-13&rft.volume=135&rft.issue=6&rft.spage=2213&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+American+Chemical+Society&rft.issn=1520-5126&rft_id=info:doi/10.1021%2Fja309501s LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-08-01 N1 - Date created - 2013-02-13 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1021/ja309501s ER - TY - JOUR T1 - New type of possible high-pressure polymorphism in NiAs minerals in planetary cores AN - 1312835787; 2013-021236 AB - The nickel arsenide (B8 (sub 1) ) and related crystal structures are among the most important crystallographic arrangements assumed by Fe and Ni compounds with light elements such as Si, O, S, and P, expected to be present in planetary cores. Despite the simple structure, some of these materials like troilite (FeS) exhibit complex phase diagrams and rich polymorphism, involving significant changes in interatomic bonding and physical properties. NiP (oP16) represents one of the two principal structure distortions found in the nickel arsenide family and is characterized by P-P bonding interactions that lead to the formation of P (sub 2) dimers. In the current study, the single-crystal synchrotron X-ray diffraction technique, aided by first principles density functional theory (DFT) calculations, has been applied to examine the compression behavior of NiP up to 30 GPa. Two new reversible displacive phase transitions leading to orthorhombic high-pressure phases with Pearson symbols oP40 and oC24 were found to occur at approximately 8.5 and 25.0 GPa, respectively. The oP40 phase has the primitive Pnma space group with unit cell a = 4.7729(5) Aa, b = 16.6619(12) Aa, and c = 5.8071(8) Aa at 16.3(1) GPa and is a superstructure of the ambient oP16 phase with multiplicity of 2.5. The oC24 phase has the acentric Cmc2 (sub 1) space group with unit cell a = 9.695(6) Aa, b = 5.7101(9) Aa, and c = 4.7438(6) Aa at 28.5(1) GPa and is a superstructure of the oP16 phase with multiplicity of 1.5. DFT calculations fully support the observed sequence of phase transitions. The two new phases constitute logical next stages of P sublattice polymerization, in which the dilution of the P (sub 3) units, introduced in the first high-pressure phase, decreases, leading to compositions of Ni (sub 20) (P (sub 3) ) (sub 4) (P (sub 2) ) (sub 4) and Ni (sub 12) (P (sub 3) ) (sub 4) , and provide important clues to understanding of phase relations and transformation pathways in the NiAs family. Copyright 2012 Springer-Verlag Berlin Heidelberg JF - Physics and Chemistry of Minerals AU - Dera, Przemyslaw AU - Nisar, Jawad AU - Ahuja, Rajeev AU - Tkachev, Sergey AU - Prakapenka, Vitali B Y1 - 2013/02// PY - 2013 DA - February 2013 SP - 183 EP - 193 PB - Springer-Verlag, Berlin - New York VL - 40 IS - 2 SN - 0342-1791, 0342-1791 KW - pressure KW - space groups KW - nickel arsenide KW - unit cell KW - crystal structure KW - nickel phosphide KW - bonding KW - phosphides KW - high pressure KW - temperature KW - polymorphism KW - arsenides KW - planetary interiors KW - core KW - alloys KW - transformations KW - sulfides KW - troilite KW - high temperature KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312835787?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Physics+and+Chemistry+of+Minerals&rft.atitle=New+type+of+possible+high-pressure+polymorphism+in+NiAs+minerals+in+planetary+cores&rft.au=Dera%2C+Przemyslaw%3BNisar%2C+Jawad%3BAhuja%2C+Rajeev%3BTkachev%2C+Sergey%3BPrakapenka%2C+Vitali+B&rft.aulast=Dera&rft.aufirst=Przemyslaw&rft.date=2013-02-01&rft.volume=40&rft.issue=2&rft.spage=183&rft.isbn=&rft.btitle=&rft.title=Physics+and+Chemistry+of+Minerals&rft.issn=03421791&rft_id=info:doi/10.1007%2Fs00269-012-0560-6 L2 - http://www.springerlink.com/content/100449/?p=e597e977f1914094b3810f7e67f0a453&pi=0 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany N1 - Date revised - 2013-01-01 N1 - Document feature - illus. N1 - SuppNotes - Based on Publisher-supplied data N1 - Last updated - 2013-02-28 N1 - CODEN - PCMIDU N1 - SubjectsTermNotLitGenreText - alloys; arsenides; bonding; core; crystal structure; high pressure; high temperature; nickel arsenide; nickel phosphide; phosphides; planetary interiors; polymorphism; pressure; space groups; sulfides; temperature; transformations; troilite; unit cell DO - http://dx.doi.org/10.1007/s00269-012-0560-6 ER - TY - JOUR T1 - New energy vehicles in China: policies, demonstration, and progress AN - 1291624883; 17668379 AB - Since 2009, China has become the largest new vehicle market in the world. To address the energy security and urban air-pollution concerns that emerge from rapid vehicle population growth, China has initiated the Thousands of Vehicles, Tens of Cities (TVTC) Program to accelerate the new energy vehicle (NEV) commercialization. In this paper, we summarize the efforts made by the Chinese government since 1995 in the areas of research and development, demonstration, and communalization of NEVs; evaluate the progress of NEV demonstration; and provide some recommendations for future development. Our analysis has determined that the deployment of NEVs for the TVTC Program is lagging behind the original plan and, on average, only 26-36% of the goals have been attained by October 2011. Although China has approved many NEV models for sale, significantly more than 50% of them are not in production. On the other hand, stimulated by the policy shift, electric vehicle production has increased considerably, thereby contributing 23% and 44% of the total NEV production in 2010 and 2011, respectively. Additionally, because of the constraints imposed by price and technology maturity, lead-acid battery technology is a substantial factor in the high-volume sales of top NEV car models. JF - Mitigation and Adaptation Strategies for Global Change AU - Gong, Huiming AU - Wang, Michael Q AU - Wang, Hewu AD - Center for Transportation Research, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA, gonghuiming@efchina.org Y1 - 2013/02// PY - 2013 DA - Feb 2013 SP - 207 EP - 228 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 18 IS - 2 SN - 1381-2386, 1381-2386 KW - Pollution Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Environment Abstracts; Sustainability Science Abstracts KW - Population Dynamics KW - Prices KW - Population growth KW - Population dynamics KW - Cities KW - Batteries KW - Marketing KW - Adaptation KW - Maturity KW - Research KW - Policies KW - Adaptations KW - Vehicles KW - Model Studies KW - Air pollution KW - Security KW - Adaptability KW - Energy KW - China, People's Rep. KW - Research programs KW - Technology KW - ENA 03:Energy KW - Q5 08503:Characteristics, behavior and fate KW - AQ 00006:Sewage KW - SW 5040:Data acquisition KW - P 9999:GENERAL POLLUTION KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1291624883?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mitigation+and+Adaptation+Strategies+for+Global+Change&rft.atitle=New+energy+vehicles+in+China%3A+policies%2C+demonstration%2C+and+progress&rft.au=Kade%2C+Matthew%3BZaborina%2C+Olga%3BZaborin%2C+Alexander%3BDefazio%2C+Jennifer%3BAlverdy%2C+John%3BTirrell%2C+Matthew&rft.aulast=Kade&rft.aufirst=Matthew&rft.date=2013-11-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2013+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2013%29&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Number of references - 57 N1 - Last updated - 2014-05-15 N1 - SubjectsTermNotLitGenreText - Policies; Adaptations; Batteries; Vehicles; Marketing; Research; Population dynamics; Air pollution; Cities; Security; Adaptability; Population growth; Maturity; Research programs; Technology; Energy; Prices; Population Dynamics; Adaptation; Model Studies; China, People's Rep. DO - http://dx.doi.org/10.1007/s11027-012-9358-6 ER - TY - JOUR T1 - LcrV Mutants That Abolish Yersinia Type III Injectisome Function AN - 1291602059; 17647930 AB - LcrV, the type III needle cap protein of pathogenic Yersinia, has been proposed to function as a tether between YscF, the needle protein, and YopB-YopD to constitute the injectisome, a conduit for the translocation of effector proteins into host cells. Further, insertion of LcrV-capped needles from a calcium-rich environment into host cells may trigger the low-calcium signal for effector translocation. Here, we used a genetic approach to test the hypothesis that the needle cap responds to the low-calcium signal by promoting injectisome assembly. Growth restriction of Yersinia pestis in the absence of calcium (low-calcium response [LCR+] phenotype) was exploited to isolate dominant negative lcrV alleles with missense mutations in its amber stop codon (lcrV*327). The addition of at least four amino acids or the eight-residue Strep tag to the C terminus was sufficient to generate an LCR- phenotype, with variant LcrV capping type III needles that cannot assemble the YopD injectisome component. The C-terminal Strep tag appears buried within the cap structure, blocking effector transport even in Y. pestis yscF variants that are otherwise calcium blind, a constitutive type III secretion phenotype. Thus, LcrV*327 mutants arrest the needle cap in a state in which it cannot respond to the low-calcium signal with either injectisome assembly or the activation of type III secretion. Insertion of the Strep tag at other positions of LcrV produced variants with wild-type LCR+, LCR-, or dominant negative LCR- phenotypes, thereby allowing us to identify discrete sites within LcrV as essential for its attributes as a secretion substrate, needle cap, and injectisome assembly factor. JF - Journal of Bacteriology AU - Ligtenberg, Katherine Given AU - Miller, Nathan C AU - Mitchell, Anthony AU - Plano, Gregory V AU - Schneewind, Olaf AD - Howard Taylor Ricketts Laboratory, Argonne National Laboratory, Argonne, Illinois, USA, OlafSchneewind,oschnee{at}bsd.uchicago.edu. Y1 - 2013/02// PY - 2013 DA - Feb 2013 SP - 777 EP - 787 PB - American Society for Microbiology, 1752 N Street N.W. Washington, DC 20036 United States VL - 195 IS - 4 SN - 0021-9193, 0021-9193 KW - Microbiology Abstracts B: Bacteriology KW - Protein transport KW - Missense mutation KW - Calcium KW - Amino acids KW - Secretion KW - LcrV protein KW - Yersinia pestis KW - Stop codon KW - Insertion KW - Catabolite activator protein KW - Translocation KW - Amber KW - J 02320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1291602059?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Bacteriology&rft.atitle=LcrV+Mutants+That+Abolish+Yersinia+Type+III+Injectisome+Function&rft.au=Ligtenberg%2C+Katherine+Given%3BMiller%2C+Nathan+C%3BMitchell%2C+Anthony%3BPlano%2C+Gregory+V%3BSchneewind%2C+Olaf&rft.aulast=Ligtenberg&rft.aufirst=Katherine&rft.date=2013-02-01&rft.volume=195&rft.issue=4&rft.spage=777&rft.isbn=&rft.btitle=&rft.title=Journal+of+Bacteriology&rft.issn=00219193&rft_id=info:doi/10.1128%2FJB.02021-12 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Number of references - 50 N1 - Last updated - 2013-07-15 N1 - SubjectsTermNotLitGenreText - Protein transport; Stop codon; Missense mutation; Amino acids; Calcium; Insertion; Secretion; LcrV protein; Catabolite activator protein; Translocation; Amber; Yersinia pestis DO - http://dx.doi.org/10.1128/JB.02021-12 ER - TY - JOUR T1 - Melting of compressed iron by monitoring atomic dynamics AN - 1347455872; 2013-036339 AB - We present a novel method for detecting the solid-liquid phase boundary of compressed iron at high temperatures using synchrotron Mossbauer spectroscopy (SMS). Our approach is unique because the dynamics of the iron atoms are monitored. This process is described by the Lamb-Mossbauer factor, which is related to the mean-square displacement of the iron atoms. Focused synchrotron radiation with 1 meV bandwidth passes through a laser-heated (super 57) Fe sample inside a diamond-anvil cell, and the characteristic SMS time signature vanishes when melting occurs. At our highest compression measurement and considering thermal pressure, we find the melting point of iron to be T (sub M) =3025+ or -115 K at P=82+ or -5 GPa. When compared with previously reported melting points for iron using static compression methods with different criteria for melting, our melting trend defines a steeper positive slope as a function of pressure. The obtained melting temperatures represent a significant step toward a reliable melting curve of iron at Earth's core conditions. For other terrestrial planets possessing cores with liquid portions rich in metallic iron, such as Mercury and Mars, the higher melting temperatures for compressed iron may imply warmer internal temperatures. Abstract Copyright (2013) Elsevier, B.V. JF - Earth and Planetary Science Letters AU - Jackson, Jennifer M AU - Sturhahn, Wolfgang AU - Lerche, Michael AU - Zhao, Jiyong AU - Toellner, Thomas S AU - Alp, E Ercan AU - Sinogeikin, Stanislav V AU - Bass, Jay D AU - Murphy, Caitlin A AU - Wicks, June K Y1 - 2013/01/15/ PY - 2013 DA - 2013 Jan 15 SP - 143 EP - 150 PB - Elsevier, Amsterdam VL - 362 SN - 0012-821X, 0012-821X KW - mantle KW - melts KW - iron KW - temperature KW - synchrotron radiation KW - melting KW - phase equilibria KW - atomic dynamics KW - spectra KW - compression KW - P-T conditions KW - Mossbauer spectra KW - liquid phase KW - experimental studies KW - monitoring KW - Earth KW - pressure KW - high pressure KW - new methods KW - terrestrial planets KW - solid phase KW - planets KW - metals KW - core KW - high temperature KW - 17B:Geophysics of minerals and rocks KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1347455872?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+and+Planetary+Science+Letters&rft.atitle=Melting+of+compressed+iron+by+monitoring+atomic+dynamics&rft.au=Jackson%2C+Jennifer+M%3BSturhahn%2C+Wolfgang%3BLerche%2C+Michael%3BZhao%2C+Jiyong%3BToellner%2C+Thomas+S%3BAlp%2C+E+Ercan%3BSinogeikin%2C+Stanislav+V%3BBass%2C+Jay+D%3BMurphy%2C+Caitlin+A%3BWicks%2C+June+K&rft.aulast=Jackson&rft.aufirst=Jennifer&rft.date=2013-01-15&rft.volume=362&rft.issue=&rft.spage=143&rft.isbn=&rft.btitle=&rft.title=Earth+and+Planetary+Science+Letters&rft.issn=0012821X&rft_id=info:doi/10.1016%2Fj.epsl.2012.11.048 L2 - http://www.sciencedirect.com/science/journal/0012821X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 71 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2013-05-02 N1 - CODEN - EPSLA2 N1 - SubjectsTermNotLitGenreText - atomic dynamics; compression; core; Earth; experimental studies; high pressure; high temperature; iron; liquid phase; mantle; melting; melts; metals; monitoring; Mossbauer spectra; new methods; P-T conditions; phase equilibria; planets; pressure; solid phase; spectra; synchrotron radiation; temperature; terrestrial planets DO - http://dx.doi.org/10.1016/j.epsl.2012.11.048 ER - TY - CPAPER T1 - Interacting with weather radar data using Python T2 - 93rd American Meteorological Society Annual Meeting (AMS 2013) AN - 1369230509; 6216125 JF - 93rd American Meteorological Society Annual Meeting (AMS 2013) AU - Collis, Scott AU - Giangrande, S AU - North, K Y1 - 2013/01/06/ PY - 2013 DA - 2013 Jan 06 KW - Weather KW - Data processing KW - Radar KW - Python UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1369230509?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=93rd+American+Meteorological+Society+Annual+Meeting+%28AMS+2013%29&rft.atitle=Interacting+with+weather+radar+data+using+Python&rft.au=Collis%2C+Scott%3BGiangrande%2C+S%3BNorth%2C+K&rft.aulast=Collis&rft.aufirst=Scott&rft.date=2013-01-06&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=93rd+American+Meteorological+Society+Annual+Meeting+%28AMS+2013%29&rft.issn=&rft_id=info:doi/ L2 - https://ams.confex.com/ams/93Annual/webprogram/meeting.html# LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-31 N1 - Last updated - 2013-06-19 ER - TY - JOUR T1 - Going about submicron components of Comet Wild 2 and asteroid regolith with a nondestructive 3D nano-imaging approach AN - 1849304071; 2016-105536 JF - Annual Meeting of the Meteoritical Society AU - Hu, Z W AU - Winarski, R AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract no. 5349 PB - Meteoritical Society, [varies] VL - 76 SN - 0735-049X, 0735-049X KW - nondestructive methods KW - methods KW - comets KW - asteroids KW - Stardust Mission KW - Hayabusa Mission KW - X-ray analysis KW - Wild 2 Comet KW - 3D nano-imaging KW - cometary dust KW - regolith KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849304071?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Going+about+submicron+components+of+Comet+Wild+2+and+asteroid+regolith+with+a+nondestructive+3D+nano-imaging+approach&rft.au=Hu%2C+Z+W%3BWinarski%2C+R%3BAnonymous&rft.aulast=Hu&rft.aufirst=Z&rft.date=2013-01-01&rft.volume=76&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2013/pdf/5349.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 76th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 12 N1 - SuppNotes - Accessed on Apr. 11, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - 3D nano-imaging; asteroids; cometary dust; comets; Hayabusa Mission; methods; nondestructive methods; regolith; Stardust Mission; Wild 2 Comet; X-ray analysis ER - TY - JOUR T1 - Atom-probe measurements of meteoritic nanodiamonds and terrestrial standards AN - 1849298302; 2016-105580 JF - Annual Meeting of the Meteoritical Society AU - Lewis, J B AU - Isheim, D AU - Floss, C AU - Daulton, T L AU - Seidman, D N AU - Heck, P R AU - Davis, A M AU - Pellin, M J AU - Savina, M R AU - Hiller, J AU - Mane, A AU - Elam, J W AU - Stephan, T AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract no. 5296 PB - Meteoritical Society, [varies] VL - 76 SN - 0735-049X, 0735-049X KW - nanodiamond KW - stony meteorites KW - isotopes KW - atom-probe tomography KW - isotope ratios KW - C-13/C-12 KW - native elements KW - carbonaceous chondrites KW - CV chondrites KW - stable isotopes KW - Allende Meteorite KW - meteorites KW - focused ion beam KW - presolar grains KW - carbon KW - standard materials KW - diamond KW - chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1849298302?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+of+the+Meteoritical+Society&rft.atitle=Atom-probe+measurements+of+meteoritic+nanodiamonds+and+terrestrial+standards&rft.au=Lewis%2C+J+B%3BIsheim%2C+D%3BFloss%2C+C%3BDaulton%2C+T+L%3BSeidman%2C+D+N%3BHeck%2C+P+R%3BDavis%2C+A+M%3BPellin%2C+M+J%3BSavina%2C+M+R%3BHiller%2C+J%3BMane%2C+A%3BElam%2C+J+W%3BStephan%2C+T%3BAnonymous&rft.aulast=Lewis&rft.aufirst=J&rft.date=2013-01-01&rft.volume=76&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+of+the+Meteoritical+Society&rft.issn=0735049X&rft_id=info:doi/ L2 - http://www.hou.usra.edu/meetings/metsoc2013/pdf/5296.pdf http://meteoriticalsociety.org/?page_id=18 LA - English DB - GeoRef N1 - Conference title - 76th annual meeting of the Meteoritical Society N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2016-01-01 N1 - Number of references - 6 N1 - SuppNotes - Accessed on Apr. 26, 2016 N1 - Last updated - 2016-12-16 N1 - SubjectsTermNotLitGenreText - Allende Meteorite; atom-probe tomography; C-13/C-12; carbon; carbonaceous chondrites; chondrites; CV chondrites; diamond; focused ion beam; isotope ratios; isotopes; meteorites; nanodiamond; native elements; presolar grains; stable isotopes; standard materials; stony meteorites ER - TY - JOUR T1 - An improved understanding of iron (hydro)oxide formation on environmentally abundant minerals AN - 1832679941; 768086-93 JF - Program and Abstracts - Annual Meeting of the Clay Minerals Society AU - Jun, Young-Shin AU - Hu, Yandi AU - Neil, Chelsea W AU - Lee, Byeongdu AU - ? Y1 - 2013 PY - 2013 DA - 2013 SP - 113 PB - Clay Minerals Society, Aurora, CO VL - 50 SN - 1550-2244, 1550-2244 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832679941?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.atitle=An+improved+understanding+of+iron+%28hydro%29oxide+formation+on+environmentally+abundant+minerals&rft.au=Jun%2C+Young-Shin%3BHu%2C+Yandi%3BNeil%2C+Chelsea+W%3BLee%2C+Byeongdu%3B%3F&rft.aulast=Jun&rft.aufirst=Young-Shin&rft.date=2013-01-01&rft.volume=50&rft.issue=&rft.spage=113&rft.isbn=&rft.btitle=&rft.title=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.issn=15502244&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Annual meeting of the Clay Minerals Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - CO N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Observing the interactions of ions with muscovite-water interfaces using X-rays AN - 1832675918; 768086-50 JF - Program and Abstracts - Annual Meeting of the Clay Minerals Society AU - Fenter, Paul AU - ? Y1 - 2013 PY - 2013 DA - 2013 SP - 62 PB - Clay Minerals Society, Aurora, CO VL - 50 SN - 1550-2244, 1550-2244 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832675918?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.atitle=Observing+the+interactions+of+ions+with+muscovite-water+interfaces+using+X-rays&rft.au=Fenter%2C+Paul%3B%3F&rft.aulast=Fenter&rft.aufirst=Paul&rft.date=2013-01-01&rft.volume=50&rft.issue=&rft.spage=62&rft.isbn=&rft.btitle=&rft.title=Program+and+Abstracts+-+Annual+Meeting+of+the+Clay+Minerals+Society&rft.issn=15502244&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Annual meeting of the Clay Minerals Society N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - CO N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Calcium carbonate polymorphs on mica substrates and their interfacial free energies; implications for mineral trapping mechanisms in geologic CO (sub 2) sequestration AN - 1832673881; 768087-28 JF - Program and Abstracts - Annual Meeting of the Clay Minerals Society AU - Li, Qingyun AU - Lee, Byeongdu AU - Fernandez-Martinez, Alejandro AU - Waychunas, Glenn A AU - Jun, Young-Shin Y1 - 2013 PY - 2013 DA - 2013 SP - 147 PB - Clay Minerals Society, Aurora, CO VL - 50 SN - 1550-2244, 1550-2244 KW - silicates KW - carbon sequestration KW - silica minerals KW - muscovite KW - free energy KW - crystal growth KW - mineralogy KW - substrates KW - polymorphism KW - nucleation KW - mica group KW - interfaces KW - quartz KW - sheet silicates KW - framework silicates KW - calcium carbonate KW - crystal chemistry KW - mineral surface KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832673881?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=Performance+of+U-silicide+coated+U-Mo+fuel+particle+dispersion+in+Al+during+irradiation&rft.au=Kim%2C+Yeon+Soo%3BPark%2C+J+M%3BRyu%2C+H+J&rft.aulast=Kim&rft.aufirst=Yeon&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=606&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - PubXState - CO N1 - Last updated - 2017-01-24 N1 - SubjectsTermNotLitGenreText - calcium carbonate; carbon sequestration; crystal chemistry; crystal growth; framework silicates; free energy; interfaces; mica group; mineral surface; mineralogy; muscovite; nucleation; polymorphism; quartz; sheet silicates; silica minerals; silicates; substrates ER - TY - JOUR T1 - Synthesis, Characterization, and Structural Modeling of High-Capacity, Dual Functioning MnO sub(2) Electrode/Electrocatalysts for Li-O sub(2) Cells AN - 1770324747; 18479106 AB - It has become clear that cycling lithium-oxygen cells in carbonate electrolytes is impractical, as electrolyte decomposition, triggered by oxygen reduction products, dominates the cell chemistry. This research shows that employing an [alpha]-MnO sub(2)/ramsdellite-Mn O sub(2) electrode/electrocatalyst results in the formation of lithium-oxide-like discharge products in propylene carbonate, which has been reported to be extremely susceptible to decomposition. X-ray photoelectron data have shown that what are likely lithium oxides (Li sub(2)O sub(2) and Li sub(2)O) appear to form and decompose on the air electrode surface, particularly at the MnO sub(2) surface, while Li sub(2)CO sub(3) is also formed. By contrast, cells without [alpha]-MnO sub(2)/ramsdellite-Mn O sub(2) fail rapidly in electrochemical cycling, likely due to the differences in the discharge product. Relatively high electrode capacities, up to 5000 mAh/g (carbon + electrode/electrocatalyst), have been achieved with non-optimized air electrodes. Insights into reversible insertion reactions of lithium, lithium peroxide (Li sub(2)O sub(2)) and lithium oxide (Li sub(2)O) in the tunnels of [alpha]-MnO sub(2), and the reaction of lithium with ramsdellite-MnO sub(2), as determined by first principles density functional theory calculations, are used to provide a possible explanation for some of the observed results. It is speculated that a Li sub(2)O-stabilized and partially-lithiated electrode component, 0.15Li sub(2)O.[alpha]-Li sub(x)MnO sub(2), that has Mn super(4+/3+) character may facilitate the Li sub(2)O sub(2)/Li sub(2)O discharge/charge chemistries providing dual electrode/electrocatalyst functionality. Lithium-oxygen batteries offer extremely attractive theoretical energy densities and thus represent a rapidly emerging area of research. Developing efficient, long-lasting Li-O sub(2) cells will require many technological improvements. Regarding the charge hysteresis, this approach develops transition metal oxide electrocatalysts that have a natural affinity to form compounds with Li sub(2)O, the ultimate discharge product in a non-aqueous Li-O sub(2) cell. JF - Advanced Energy Materials AU - Trahey, Lynn AU - Karan, Naba K AU - Chan, Maria KY AU - Lu, Jun AU - Ren, Yang AU - Greeley, Jeffrey AU - Balasubramanian, Mahalingam AU - Burrell, Anthony K AU - Curtiss, Larry A AU - Thackeray, Michael M AD - X-ray Sciences Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA. trahey@anl.gov Y1 - 2013/01// PY - 2013 DA - January 2013 SP - 75 EP - 84 PB - Wiley-Blackwell, Baffins Lane Chichester W. Sussex PO19 1UD United Kingdom VL - 3 IS - 1 SN - 1614-6832, 1614-6832 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); ANTE: Abstracts in New Technologies and Engineering (AN); Aerospace & High Technology Database (AH) KW - Li-O sub(2) KW - batteries KW - MnO sub(2) KW - electrocatalysts KW - electrodes KW - Discharge KW - Electrolytic cells KW - Lithium oxide KW - Electrodes KW - Charge KW - Electrocatalysts KW - Decomposition KW - Lithium KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1770324747?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=SHARP+FUEL+ASSEMBLY+COUPLED+SIMULATION+DEMONSTRATIONS&rft.au=Mahadevan%2C+V%3BMerzari%2C+E%3BJain%2C+R%3BObabko%2C+A%3BSmith%2C+M%3BTautges%2C+T%3BFischer%2C+P%3BPointer%2C+W+D%3BFerencz%2C+R&rft.aulast=Mahadevan&rft.aufirst=V&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=774&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-03-04 DO - http://dx.doi.org/10.1002/aenm.201200037 ER - TY - JOUR T1 - Silicon-Graphene Composite Anodes for High-Energy Lithium Batteries AN - 1660084965; 21296701 AB - A chemical vapor deposition process is introduced to prepare silicon (Si)-graphene composite anode materials for lithium-ion batteries. Highly ordered crystalline Si particles are deposited onto graphene sheets by using a liquid chlorosilane as Si source. The Si-graphene composite exhibits high utilization of Si in charge-discharge processes. The capacity retention of 90% after 500full cycles and an average Coulombic efficiency in excess of 99.5% are achieved in half cells. Moreover, atomic layer deposition (ALD) Al sub(2)O sub(3) coating is directly applied on the Si-graphene electrode, which greatly suppresses the side reactions between the electrode and electrolyte, resulting in the enhancement in initial Coulombic efficiency and reversible capacity. Finally, a 3.6V full cell device is demonstrated, which works very well by combining a Si-graphene anode with a Li-excess layer-structured composite Li sub(1.2)Ni sub(0.2)Mn sub(0.6)O sub(2) cathode. This approach is very promising for realizing a high-energy lithium-ion battery. Acting the part: The deposition of crystalline silicon particles onto graphene sheets provides a composite anode material for lithium ion battery. The composite exhibits a high utilization of Si, ultrastable cycling properties, and a high Coulombic efficiency. ALD Al sub(2)O sub(3) coating suppresses side reactions between Si-graphene anode and electrolyte. A 3.6V full cell combining the Si-graphene anode and a Li sub(1.2)Ni sub(0.2)Mn sub(0.6)O sub(2) cathode works very well. JF - Energy Technology AU - Ren, Jian-Guo AU - Wu, Qi-Hui AU - Hong, Guo AU - Zhang, Wen-Jun AU - Wu, Huiming AU - Amine, Khalil AU - Yang, Junbing AU - Lee, Shuit-Tong AD - Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices & Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 (PR China). Y1 - 2013/01// PY - 2013 DA - Jan 2013 SP - 77 EP - 84 PB - Wiley Subscription Services, Inc., 1105 N Market St Wilmington DE 19801 Germany VL - 1 IS - 1 SN - 2194-4288, 2194-4288 KW - Solid State and Superconductivity Abstracts (SO); Mechanical & Transportation Engineering Abstracts (MT); Advanced Polymers Abstracts (EP); Environmental Engineering Abstracts (EN); Composites Industry Abstracts (ED); Engineered Materials Abstracts, Ceramics (EC); CSA / ASCE Civil Engineering Abstracts (CE); Aluminium Industry Abstracts (AI); Aerospace & High Technology Database (AH) KW - Cathodes KW - Silicon KW - Electrolytic cells KW - Graphene KW - Electrodes KW - Anodes KW - Deposition KW - Lithium batteries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1660084965?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+Technology&rft.atitle=Silicon-Graphene+Composite+Anodes+for+High-Energy+Lithium+Batteries&rft.au=Ren%2C+Jian-Guo%3BWu%2C+Qi-Hui%3BHong%2C+Guo%3BZhang%2C+Wen-Jun%3BWu%2C+Huiming%3BAmine%2C+Khalil%3BYang%2C+Junbing%3BLee%2C+Shuit-Tong&rft.aulast=Ren&rft.aufirst=Jian-Guo&rft.date=2013-01-01&rft.volume=1&rft.issue=1&rft.spage=77&rft.isbn=&rft.btitle=&rft.title=Energy+Technology&rft.issn=21944288&rft_id=info:doi/10.1002%2Fente.200038 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-03-01 N1 - Last updated - 2015-12-07 DO - http://dx.doi.org/10.1002/ente.200038 ER - TY - JOUR T1 - Effects of enhanced vegetation and wetlands on the interception of contaminants at the groundwater-surface water interface AN - 1553084902; 2014-064143 AB - The effects of dry-land and wetland vegetation can play an important role in controlling the exchange of contaminants across the groundwater-surface water interface. This paper describes an ongoing field study being conducted by the U.S. Department of Agriculture at a test site in Nebraska, in which selective vegetation plantings are being used to mitigate the impacts of contaminated groundwater discharge to a naturally gaining stream. At the test site, preliminary studies demonstrated that the naturally occurring vegetation along a gaining stream was capable of intercepting several contaminants identified in the groundwater feeding the stream. The contaminants of concern in the groundwater included carbon tetrachloride, as a result of historic grain storage and fumigation activities upgradient of the headwaters, and nitrate contributed from surrounding agricultural lands. To capitalize on these observations, the natural vegetation was augmented by the planting of selected dry-land species, and the creation of a in-stream wetland, in an 8-acre area surrounding the headwaters area. To document the effects of the vegetation enhancements on contaminant migration via the groundwater-surface water interface, a comprehensive strategy has been implemented to monitor the site since 2006. The key elements of this multi-faceted program have included: hydrologic monitoring, involving continuous tracking of water levels and stream flow rates; the measurement of sap flow rates to investigate the movement of fluids within the vegetation; and direct water and vegetation sampling for contaminant and geochemical analyses. The investigation results from the past seven years quantitatively demonstrate that significant and beneficial changes have occurred in the hydrologic, geochemical, and biological characteristics of the groundwater and surface water environments, and in the transport, transformation, and reduction of contaminants within these systems, in response to the vegetation enhancements. The experience gained from this test has provided both fundamental and practical information pertinent to the application of enhanced vegetation (and wetlands), for manipulation of the hydrologic processes, and potential contaminant mitigation, in other similar near-surface environments. JF - Abstracts with Programs - Geological Society of America AU - LaFreniere, Lorraine M AU - Yan, Y Eugene AU - Sedivy, Robert A AU - Gilmore, Steve AU - Roe, Caroline AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 856 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1553084902?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=ITRAP%2B10+Testing+of+Gamma+and+Neutron+Search+Devices&rft.au=Klann%2C+R%3BMannino%2C+M%3BBrandt%2C+L%3BMurphy%2C+L&rft.aulast=Klann&rft.aufirst=R&rft.date=2013-11-14&rft.volume=109&rft.issue=&rft.spage=1227&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper233783.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-08-14 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Plug-In Electric Cars for Work Travel: Evaluation of Four Electric Powertrains AN - 1551078161; 19997407 AB - Vehicles with electrified powertrains such as hybrid electric vehicles, plug-in hybrid electric vehicles (PHEVs), and all-electric vehicles (AEVs, which use grid-supplied battery energy exclusively) are potentially marketable because of their low operating costs. However, each vehicle type incurs a significant initial cost penalty compared with a conventional vehicle powered by an internal combustion engine. Three PHEV cars and an AEV car are selected to assess cost-effectiveness from the consumers' perspective. Daily travel to and from work is isolated from other vehicle travel data from the U.S. National Household Travel Survey, and five daily distance categories are investigated. Three driving cycle runs are used: one developed by following cars in Los Angeles, California, in 1992, the Worldwide Harmonized Light-Duty Test Cycle, and a real driving record selected from the Kansas City metropolitan area in Kansas and Missouri. Probable charging patterns for each PHEV and the AEV are investigated for three of five daily distance categories. Overnight charging and workplace charging also are examined. The possibility for multiple charges at work is considered, as is the possibility of a charge after work, before the day's end. The degree of importance of spending a given pool of money to upgrade a residential (versus workplace) charging station is discussed. Two indicators of effectiveness of battery pack utilization are developed [a charge-depleting effectiveness factor and grid kilowatt-hours used per day per dollar of incremental vehicle expense (cost-effectiveness)], and target markets for cars used for work for each powertrain type are suggested. JF - Transportation Research Record AU - Santini, Danilo AU - Zhou, Yan AU - Kim, Namdoo AU - Gallagher, Kevin AU - Vyas, Anant D AD - Center for Transportation Research, Argonne National Laboratory, Building 362, 9700 South Cass Avenue, Argonne, IL 60439 Y1 - 2013 PY - 2013 DA - 2013 SP - 53 EP - 60 PB - Transportation Research Board IS - 2385 SN - 0361-1981, 0361-1981 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Charging KW - Driving KW - Automotive engineering KW - Powertrains KW - Marketing KW - Automobiles KW - Hybrid vehicles KW - Categories UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1551078161?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transportation+Research+Record&rft.atitle=Plug-In+Electric+Cars+for+Work+Travel%3A+Evaluation+of+Four+Electric+Powertrains&rft.au=Santini%2C+Danilo%3BZhou%2C+Yan%3BKim%2C+Namdoo%3BGallagher%2C+Kevin%3BVyas%2C+Anant+D&rft.aulast=Santini&rft.aufirst=Danilo&rft.date=2013-01-01&rft.volume=&rft.issue=2385&rft.spage=53&rft.isbn=9780309287029&rft.btitle=&rft.title=Transportation+Research+Record&rft.issn=03611981&rft_id=info:doi/10.3141%2F2385-07 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-08-01 N1 - Number of references - 32 N1 - Last updated - 2014-08-05 DO - http://dx.doi.org/10.3141/2385-07 ER - TY - JOUR T1 - Is the Nubian Sandstone aquifer system being depleted? AN - 1549619417; 2014-059641 AB - The Nubian Sandstone Aquifer System (NSAS) covers large territories (area: 2X10 (super 6) km (super 2) ) in four countries: Sudan (17%), Libya (34%), Chad (11%), and Egypt (38%). The NSAS comprises two interconnected major basins: the Kufra Basin in Libya, Sudan, and Chad and Dakhla Basin in Egypt. In this study, we are developing and applying an integrated cost-effective approach to understand the hydrologic setting of the NSAS and the factors (i.e., natural and/or anthropogenic) controlling it evolution. In this understanding we are trying to answer these questions: (1) is the NSAS used in a sustainable manner, or it is being depleted? (2) if the latter is true, how long could it be used and what would the optimum extraction rates be? Analysis of the Gravity Recovery and Climate Experiment (GRACE)-derived Terrestrial Water Storage (TWS) inter-annual trends over the NSAS revealed an area of significant TWS depletion (1.3+ or -0.66X10 (super 9) m (super 3) /yr) that is correlated with the Dakhla Basin in Egypt. Findings include (1) excessive groundwater extraction, not climatic changes, is responsible for the observed TWS depletion; (2) we estimate that the Dakhla Basin in Egypt, if mined at present extraction rates, could last for a period approaching 4000 years. If, instead, we were to adopt the projected rates of artificial extraction in 2070 (2.8X10 (super 9) m (super 3) /yr) and the present natural discharge rates (0.506X10 (super 9) m (super 3) /yr), it will be consumed in less than half this period (1500 years), and in an even shorter time period (350 years) if the extraction rates continue to double every 50 years; and (3) observed depletions over the Dakhla Basin and their absence across the remaining segments of the NSAS suggest that the aquifer is at near-steady conditions except for the Dakhla Basin that is witnessing unsteady transient conditions. Implications for applying the methodologies advocated for assessment and optimum management of a large suite of fossil aquifers worldwide are clear. JF - Abstracts with Programs - Geological Society of America AU - Ahmed, Mohamed AU - Sultan, Mohamed AU - Wahr, John AU - Yan, Eugene AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 681 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549619417?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Iron+oxidation+state+and+compressional+behaviors+of+Al%2C+Fe-rich+mantle+silicate+perovskite+up+to+90+GPa_&rft.au=Zhang%2C+Q%3BShim%2C+S%3BMeng%2C+Y%3BPrakapenka%2C+V%3BAlp%2C+E+E%3BAnonymous&rft.aulast=Zhang&rft.aufirst=Q&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper226477.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-31 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Potential future drought impacts on water availability in Texas-Gulf Basin AN - 1549619403; 2014-059706 AB - The Texas, as one of the fastest growing states in population and energy production, recently experienced a severe drought in 2011, the worst drought in the history of Texas. As a consequence of the extreme climate event, reduction of power generation, regulatory suspension of water rights and profound ecological impacts were observed due to water shortage during and thereafter the drought. To improve understanding of potential risk of decreasing water supply and energy production at Texas, an assessment of water availability and its potential impacts on power generation during drought was performed. In this impact analysis, we identified three drought scenarios based on historical drought records and projected climate from the GFDL and the PCM global climate models, for greenhouse gas emission scenarios A1B, A2, and B1 defined by the IPCC. The three drought scenarios include (1) 2011 drought conditions (the worst drought in history), with the current level of water use; (2) a single-year drought (2022) projected for the period of 2020-2030, with the assumed projected water use level for 2030; and (3) a multiple-year drought constructed with climate data for 1950-1957 and water demand projected for 2030. The projected drought scenario in 2022 and the historical droughts in 2011 and 1950-1957 represent two different precipitation patterns in the Texas-Gulf river basin. A hydrologic model was constructed for the Texas-Gulf river basin by incorporating climate and water use data corresponding to three drought scenarios, respectively, and 125 reservoirs currently supporting water withdrawal for various sectors and cooling water for power generation. The model outputs provide a base to identify vulnerable watersheds that have low water availability for the water demand required in the area and low-storage reservoirs that are at risk of providing insufficient water supply for thermoelectric cooling and other water users. The spatial distribution of the potentially vulnerable watershed and reservoirs further suggest that drought impacted areas are highly correlated with the high-population areas at the vicinity of the large metropolitan areas in Texas. The results of this impact analysis provide insights for long-term power generation planning as well as spatial water constraints on regional economic development. JF - Abstracts with Programs - Geological Society of America AU - Yan, Eugene AU - Demissie, Yonas AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 696 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549619403?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Potential+future+drought+impacts+on+water+availability+in+Texas-Gulf+Basin&rft.au=Ma%2C+Chi%3BTschauner%2C+Oliver+D%3BLiu%2C+Yang%3BSinogeikin%2C+S+V%3BZhuravlev%2C+K+K%3BPrakapenka%2C+V%3BDera%2C+P+K%3BTaylor%2C+L+A%3BAnonymous&rft.aulast=Ma&rft.aufirst=Chi&rft.date=2013-12-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper234061.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-31 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Assessment of current and projected water resources in Egypt and the MENA region using satellite-based hydrologic models AN - 1545410380; 2014-052867 AB - Water resources are critical to both economic development and political stability. With Egypt's population increasing from thirty million in the 1960's to over eighty million today and expected to rise to over 110 million by 2035, the most critical issue is quantifying the current and projected water sources for drinking supplies and agriculture. Given the inaccessible terrain and lack of adequate hydrologic monitoring networks, it is difficult to assess the hydrologic systems in Egypt and much of the Middle East and North Africa (MENA). We developed and applied an integrated approach to quantify the partitioning of precipitation into runoff, recharge, and evapo-transpiration in Egypt using hydrologic measurements extracted from satellite remote sensing. We constructed and successfully calibrated satellite-driven hydrologic models using TRMM-based precipitation, ASTER elevation, AVHRR soil moisture, and Landsat landuse and landcover data for the largest watersheds of Egypt from 1998-2013. Our earlier models were calibrated against streamflow measurements from Wadi Girafi; the calibrated parameters were then applied to ungauged basins using physical catchment descriptors. More recently, the models were further calibrated against recharge estimates extracted soil temperature probes. Climate change scenarios were performed using CO2 emission estimates from the IPCC fourth assessment report to project the change in precipitation and temperature and the subsequent impact on recharge in Egypt. First-order estimates of the average annual modern recharge for the Nubian aquifer (13.0X10 (super 6) m (super 3) /yr) and the shallow Alluvial aquifers in the Sinai Peninsula for the investigated watersheds (456X10 (super 6) m (super 3) /yr) and the shallow Alluvial aquifers in the Eastern Desert (147X10 (super 6) m (super 3) /yr) were computed using the SWAT (Soil Water Assessment Tool) model and public source global remote sensing data sets. These transferable procedures have successfully been applied to watersheds in Morocco, Turkey, and Kuwait, where preliminary estimates of the average annual recharge in the investigated watersheds are 5.2X10 (super 9) m (super 3) , 2.9X10 (super 9) m (super 3) , and 1.5X10 (super 9) m (super 3) . Results provide a clearer picture of the water resources in Egypt and the MENA region as a whole. JF - Abstracts with Programs - Geological Society of America AU - Milewski, Adam AU - Sultan, Mohamed I AU - Yan, Eugene AU - Becker, Richard H AU - Durham, Michael C AU - El Kadiri, Racha AU - Seyoum, Wondwosen M AU - Soliman, Farouk AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 162 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545410380?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Assessment+of+current+and+projected+water+resources+in+Egypt+and+the+MENA+region+using+satellite-based+hydrologic+models&rft.au=Milewski%2C+Adam%3BSultan%2C+Mohamed+I%3BYan%2C+Eugene%3BBecker%2C+Richard+H%3BDurham%2C+Michael+C%3BEl+Kadiri%2C+Racha%3BSeyoum%2C+Wondwosen+M%3BSoliman%2C+Farouk%3BAnonymous&rft.aulast=Milewski&rft.aufirst=Adam&rft.date=2013-01-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper231390.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-17 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Three-dimensional visualization of porous structure of a cluster interplanetary dust particle AN - 1545409729; 2014-054652 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Hu, Z W AU - Winarski, R AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Paper 2521 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - imagery KW - bulk density KW - density KW - textures KW - porous materials KW - interplanetary dust KW - morphology KW - visualization KW - spatial distribution KW - cosmic dust KW - X-ray data KW - X-ray phase contrast nanotomography KW - computed tomography data KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545409729?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Three-dimensional+visualization+of+porous+structure+of+a+cluster+interplanetary+dust+particle&rft.au=Hu%2C+Z+W%3BWinarski%2C+R%3BAnonymous&rft.aulast=Hu&rft.aufirst=Z&rft.date=2013-01-01&rft.volume=44&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/2521.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 8 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jan. 17, 2014 N1 - Last updated - 2014-11-13 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - bulk density; computed tomography data; cosmic dust; density; imagery; interplanetary dust; morphology; porous materials; spatial distribution; textures; visualization; X-ray data; X-ray phase contrast nanotomography ER - TY - JOUR T1 - Update to new homogeneous standards by atomic layer deposition for synchrotron X-ray fluorescence and absorption spectroscopies AN - 1545409647; 2014-054601 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Butterworth, A L AU - Becker, N AU - Gainsforth, Z AU - Lanzirotti, A AU - Newville, M AU - Proslier, T AU - Stodolna, J AU - Sutton, S AU - Tyliszczak, T AU - Westphal, A J AU - Zasadzinski, J AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Paper 3007 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - transmission electron microscopy KW - methods KW - X-ray fluorescence KW - scanning transmission X-ray microscopy KW - calibration KW - non-destructive methods KW - synchrotron radiation KW - absorption KW - quantitative analysis KW - atomic layer deposition KW - standard materials KW - X-ray spectroscopy KW - X-ray analysis KW - synthesis KW - spectroscopy KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545409647?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Update+to+new+homogeneous+standards+by+atomic+layer+deposition+for+synchrotron+X-ray+fluorescence+and+absorption+spectroscopies&rft.au=Butterworth%2C+A+L%3BBecker%2C+N%3BGainsforth%2C+Z%3BLanzirotti%2C+A%3BNewville%2C+M%3BProslier%2C+T%3BStodolna%2C+J%3BSutton%2C+S%3BTyliszczak%2C+T%3BWestphal%2C+A+J%3BZasadzinski%2C+J%3BAnonymous&rft.aulast=Butterworth&rft.aufirst=A&rft.date=2013-01-01&rft.volume=44&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/3007.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 2 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jan. 14, 2014 N1 - Last updated - 2014-07-17 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - absorption; atomic layer deposition; calibration; methods; non-destructive methods; quantitative analysis; scanning transmission X-ray microscopy; spectroscopy; standard materials; synchrotron radiation; synthesis; transmission electron microscopy; X-ray analysis; X-ray fluorescence; X-ray spectroscopy ER - TY - JOUR T1 - CHILI; the Chicago Instrument for Laser Ionization AN - 1545409478; 2014-054636 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Stephan, T AU - Pellin, M J AU - Rost, D AU - Davis, A M AU - Savina, M R AU - Trappitsch, R AU - Liu, N AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Paper 2536 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - desorption KW - chemical analysis KW - precision KW - field-emission electron gun KW - laser methods KW - isotopes KW - mass spectroscopy KW - cosmochemistry KW - Chicago Instrument for Laser Ionization KW - ultraviolet radiation KW - computer programs KW - laser ionization KW - time-of-flight mass spectroscopy KW - electromagnetic radiation KW - University of Chicago KW - spectroscopy KW - resonance ionization mass spectroscopy KW - ion guns KW - geochemistry KW - instruments KW - design KW - 04:Extraterrestrial geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545409478?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=CHILI%3B+the+Chicago+Instrument+for+Laser+Ionization&rft.au=Stephan%2C+T%3BPellin%2C+M+J%3BRost%2C+D%3BDavis%2C+A+M%3BSavina%2C+M+R%3BTrappitsch%2C+R%3BLiu%2C+N%3BAnonymous&rft.aulast=Stephan&rft.aufirst=T&rft.date=2013-01-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/2536.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Jan. 17, 2014 N1 - Last updated - 2014-11-13 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - chemical analysis; Chicago Instrument for Laser Ionization; computer programs; cosmochemistry; design; desorption; electromagnetic radiation; field-emission electron gun; geochemistry; instruments; ion guns; isotopes; laser ionization; laser methods; mass spectroscopy; precision; resonance ionization mass spectroscopy; spectroscopy; time-of-flight mass spectroscopy; ultraviolet radiation; University of Chicago ER - TY - JOUR T1 - Groundwater use associated with solar energy development in the Southwestern United States AN - 1535203941; 2014-038448 AB - Utility-scale solar energy development under consideration on public lands in the southwestern United States requires analysis of potential environmental impacts. Water requirements to support various solar technologies - for cooling systems and/or equipment cleaning - are an important factor because of water rights and ecological water considerations in this arid region. Impacts were analyzed for the Final Programmatic Environmental Impact Statement for Solar Energy Development in Six Southwestern States, released in July 2012 by the Bureau of Land Management and the U.S. Department of Energy. As a follow-on study, groundwater modeling analyses were conducted to evaluate the drawdown associated with a range of development levels and technologies at a select set of solar energy zones. The approaches of these models ranged from one-dimensional analytical models to three-dimensional numerical models which were in some cases derived from existing federal agency modeling efforts and in other cases were newly constructed using public information. Results indicate that the impacts on water levels depend strongly on the water demand of the considered solar energy technology. JF - Abstracts with Programs - Geological Society of America AU - Quinn, John J AU - Greer, Christopher B AU - O'Connor, Ben L AU - Carr, Adrianne E AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 44 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535203941?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Groundwater+use+associated+with+solar+energy+development+in+the+Southwestern+United+States&rft.au=Quinn%2C+John+J%3BGreer%2C+Christopher+B%3BO%27Connor%2C+Ben+L%3BCarr%2C+Adrianne+E%3BAnonymous&rft.aulast=Quinn&rft.aufirst=John&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=44&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper231487.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-06-13 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - (super 81) Kr concentrations in deep fracture waters of the Withwatersrand Basin, South Africa AN - 1529797290; 2014-034343 AB - (super 81) Kr has been proposed since many years an ideal tracer for dating subsurface fluids on timescales up to 2 million years. However, only recently the method became practicable for real case investigations due to significant analytical improvements [1]. In this study radioactive noble gas isotopes ( (super 81) Kr, (super 85) Kr and (super 39) Ar) were applied for the characterisation of fracture waters in the deep gold mines of the Witwatersrand Basin, South Africa [2]. Those waters catalyzed interest because of deep microbial communities that persists to depths of over 3 km [3]. The key objective of the present study is to further constrain the origin of the fluids, to determine the timing of deep subsurface life and to test the (super 81) Kr method in all kinds of environments. In contrast to expectations [4] we discovered that underground production of (super 81) Kr is a significant process in the rocks of the Withwatersrand and Ventersdorp Supergroups. All measured (super 81) Kr activities from fracture water were significantly higher than in atmospheric equilibrium. This is most likely related to elevated U/Th concentrations in the rock strata. Radiometric decay dating is complicated in such cases. JF - Mineralogical Magazine AU - Purtschert, R AU - Onstott, T C AU - Jiang, W AU - Lu, Z T AU - Mueller, P AU - van Heerden, E AU - Erasmus, M AU - Borgonie, G AU - Linage, B AU - Kuloyo, O AU - Kipfer, R AU - Brennwald, Matthias S AU - Visser, B AU - Maphanga, S AU - Joubert, L AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 2005 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - water KW - communities KW - Witwatersrand Supergroup KW - Precambrian KW - isotopes KW - krypton KW - hydrochemistry KW - Kr-81 KW - fractures KW - Ventersdorp Supergroup KW - radioactive isotopes KW - noble gases KW - Southern Africa KW - tracers KW - Africa KW - South Africa KW - geochemistry KW - Witwatersrand KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529797290?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=%28super+81%29+Kr+concentrations+in+deep+fracture+waters+of+the+Withwatersrand+Basin%2C+South+Africa&rft.au=Purtschert%2C+R%3BOnstott%2C+T+C%3BJiang%2C+W%3BLu%2C+Z+T%3BMueller%2C+P%3Bvan+Heerden%2C+E%3BErasmus%2C+M%3BBorgonie%2C+G%3BLinage%2C+B%3BKuloyo%2C+O%3BKipfer%2C+R%3BBrennwald%2C+Matthias+S%3BVisser%2C+B%3BMaphanga%2C+S%3BJoubert%2C+L%3BAnonymous&rft.aulast=Purtschert&rft.aufirst=R&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=2005&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.16 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-05-29 N1 - SubjectsTermNotLitGenreText - Africa; communities; fractures; geochemistry; hydrochemistry; isotopes; Kr-81; krypton; noble gases; Precambrian; radioactive isotopes; South Africa; Southern Africa; tracers; Ventersdorp Supergroup; water; Witwatersrand; Witwatersrand Supergroup DO - http://dx.doi.org/10.1180/minmag.2013.077.5.16 ER - TY - JOUR T1 - Spin transition of iron in amorphous Mg-silicates at mantle-related pressures AN - 1524612064; 2014-031368 AB - A sharp increase in iron partitioning into melt with respect to mineral phases was reported at 70 GPa in an Al-free system [Nomura et al. 2011]. Based on the report, it was proposed that melt may be neutrally or negatively buoyant in the deep mantle. Nomura et al. [2011] attributed the iron partitioning change to a sharp high-spin to low-spin change in iron, which was found in their measurements on a Fe-diluted (5%) Mg-silicate glass at a similar pressure. However, Andrault et al. [2012] found no sharp change in iron partitioning between silicate melt and minerals in an Al-bearing system up to 120 GPa. We measured the electronic configuration of iron in two different iron-rich (20%) Mg-silicate glasses at high pressure and 300 K in the diamond-anvil cell combined with X-ray Emission Spectroscopy (XES) and Nuclear Forward Scattering (NFS): Al-free glass up to 135 GPa and Al-bearing glass up to 93 GPa. We found no sharp changes in the spin state of iron up to our maximum pressure. Instead, the population of low-spin iron increases gradually from 1 bar in both glasses, but significant population of iron still remains high spin (40-50%) even at 90-135 GPa. Our observation is consistent with the expectation of gradual response of disordered systems to compression due to the existence of diverse coordination environments for iron in the glasses and continuous structural adjustment of the disordered system with pressure. If our results on Mg-silicate glasses can provide some insights for iron in mantle melts, the spin transition in iron should be gradual and further smeared out at the high temperatures of mantle melts [Sturhahn et al., 2005], and therefore unlikely to induce a sharp change in iron partitioning in the deep mantle. [1] C. Gu, K. Catalli, B. Grocholski, L. Gao, E. Alp, P. Chow, Y. Xiao, H. Cynn, W. J. Evans, and S. H. Shim. Electronic structure of iron in magnesium silicate glasses at high pressure. Geophys. Res. Lett., 39:L24304, 2012. JF - Mineralogical Magazine AU - Shim, S H Dan AU - Gu, C AU - Catalli, K AU - Grocholski, B AU - Gao, L AU - Alp, E AU - Chow, P AU - Xiao, Y AU - Cynn, H AU - Evans, W J AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 2198 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - silicates KW - pressure KW - amorphous materials KW - mantle KW - X-ray spectra KW - melts KW - iron KW - measurement KW - partitioning KW - metals KW - spectra KW - crystal chemistry KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524612064?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Spin+transition+of+iron+in+amorphous+Mg-silicates+at+mantle-related+pressures&rft.au=Shim%2C+S+H+Dan%3BGu%2C+C%3BCatalli%2C+K%3BGrocholski%2C+B%3BGao%2C+L%3BAlp%2C+E%3BChow%2C+P%3BXiao%2C+Y%3BCynn%2C+H%3BEvans%2C+W+J%3BAnonymous&rft.aulast=Shim&rft.aufirst=S+H&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=2198&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.19 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 1 N1 - Last updated - 2014-05-15 N1 - SubjectsTermNotLitGenreText - amorphous materials; crystal chemistry; iron; mantle; measurement; melts; metals; partitioning; pressure; silicates; spectra; X-ray spectra DO - http://dx.doi.org/10.1180/minmag.2013.077.5.19 ER - TY - JOUR T1 - The influence of perchlorate (ClO (sub 4) (super -) ) on the sorption behavior of Th(IV) on the muscovite (001) basal plane AN - 1524610941; 2014-031288 AB - In many sorption as well as other geochemical studies the perchlorate anion (ClO (sub 4) (super -) ) is used as a constituent of the background electrolyte for its non-coordinating behavior. It is assumed that by restricting the competitive coordination reaction in solution it is possible to study the unperturbed sorption reaction. The adsorption of tetravalent thorium to the muscovite (001) basal plane gives a cautionary example, where the change from a weakly coordinating anion (Cl (super -) ) to a non-coordinating anion (ClO (sub 4) (super -) ) has a drastic and unexpected effect on the sorption behavior of the cation. Results from surface X-ray diffraction techniques in combination with alpha-spectrometry measurements will be presented. On the basis of these results we will demonstrate that Th(IV) exhibits a straightforward sorption behavior driven by electrostatic attraction and, to a lesser degree solution complexation and hydrolysis, when the reaction is studied in NaCl background electrolyte media . Thorium adsorbs up to a slightly higher than charge compensating coverage of 0.4 Th/A (sub UC) predominantly as an extended outer sphere complex with two intact hydration spheres. By the same method and under the same solution conditions--but with NaClO (super -) (sub 4) instead of NaCl--the adsorption behavior changes drastically: no interaction of Th with the interface can be detected under these conditions. The changes in solution chemistry are comparably minor, and it appears unlikely that changes in the complexation behavior can explain this observation. Potential interfacial reaction mechanisms underlying this unanticipated behavior will be discussed. JF - Mineralogical Magazine AU - Schmidt, M E AU - Lee, S S AU - Wilson, R E AU - Knope, K E AU - Fenter, P AU - Soderholm, L AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 2158 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - silicates KW - chlorine KW - anions KW - sorption KW - behavior KW - muscovite KW - complexing KW - halogens KW - hydrolysis KW - electrolytes KW - adsorption KW - perchlorate KW - chemical reactions KW - mica group KW - chloride ion KW - metals KW - thorium KW - sheet silicates KW - actinides KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524610941?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=The+influence+of+perchlorate+%28ClO+%28sub+4%29+%28super+-%29+%29+on+the+sorption+behavior+of+Th%28IV%29+on+the+muscovite+%28001%29+basal+plane&rft.au=Schmidt%2C+M+E%3BLee%2C+S+S%3BWilson%2C+R+E%3BKnope%2C+K+E%3BFenter%2C+P%3BSoderholm%2C+L%3BAnonymous&rft.aulast=Schmidt&rft.aufirst=M&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=2158&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.19 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 1 N1 - Last updated - 2014-05-15 N1 - SubjectsTermNotLitGenreText - actinides; adsorption; anions; behavior; chemical reactions; chloride ion; chlorine; complexing; electrolytes; halogens; hydrolysis; metals; mica group; muscovite; perchlorate; sheet silicates; silicates; sorption; thorium DO - http://dx.doi.org/10.1180/minmag.2013.077.5.19 ER - TY - JOUR T1 - A new data set for estimating organic carbon storage to 3 m depth in soils of the northern circumpolar permafrost region AN - 1524609889; 2014-031390 AB - High-latitude terrestrial ecosystems are key components in the global carbon cycle. The Northern Circumpolar Soil Carbon Database (NCSCD) was developed to quantify stocks of soil organic carbon (SOC) in the northern circumpolar permafrost region (a total area of 18.7 X 10 (super 6) km (super 2) ). The NCSCD is a geographical information system (GIS) data set that has been constructed using harmonized regional soil classification maps together with pedon data from the northern permafrost region. Previously, the NCSCD has been used to calculate SOC storage to the reference depths 0-30 cm and 0-100 cm (based on 1778 pedons). It has been shown that soils of the northern circumpolar permafrost region also contain significant quantities of SOC in the 100-300 cm depth range, but there has been no circumpolar compilation of pedon data to quantify this deeper SOC pool and there are no spatially distributed estimates of SOC storage below 100 cm depth in this region. Here we describe the synthesis of an updated pedon data set for SOC storage (kg C m (super -2) ) in deep soils of the northern circumpolar permafrost regions, with separate data sets for the 100-200 cm (524 pedons) and 200-300 cm (356 pedons) depth ranges. These pedons have been grouped into the North American and Eurasian sectors and the mean SOC storage for different soil taxa (subdivided into Gelisols including the sub-orders Histels, Turbels, Orthels, permafrost-free Histosols, and permafrost-free mineral soil orders) has been added to the updated NCSCDv2. The updated version of the data set is freely available online in different file formats and spatial resolutions that enable spatially explicit applications in GIS mapping and terrestrial ecosystem models. While this newly compiled data set adds to our knowledge of SOC in the 100-300 cm depth range, it also reveals that large uncertainties remain. Identified data gaps include spatial coverage of deep (> 100 cm) pedons in many regions as well as the spatial extent of areas with thin soils overlying bedrock and the quantity and distribution of massive ground ice. An open access data-portal for the pedon data set and the GIS-data sets is available online at http://bolin.su.se/data/ncscd/. The NCSCDv2 data set has a digital object identifier (doi:10.5879/ECDS/00000002). JF - Earth System Science Data (ESSD) AU - Hugelius, G AU - Bockheim, J G AU - Camill, P AU - Elberling, B AU - Grosse, G AU - Harden, J W AU - Johnson, K AU - Jorgenson, T AU - Koven, C D AU - Kuhry, P AU - Michaelson, G AU - Mishra, U AU - Palmtag, J AU - Ping, C L AU - O'Donnell, J AU - Schirrmeister, L AU - Schuur, E A G AU - Sheng, Y AU - Smith, L C AU - Strauss, J AU - Yu, Z Y1 - 2013 PY - 2013 DA - 2013 SP - 393 EP - 402 PB - Copernicus Publications, Gottingen VL - 5 IS - 2 SN - 1866-3508, 1866-3508 KW - soils KW - extrapolation KW - permafrost KW - Arctic region KW - data processing KW - ecosystems KW - pedons KW - geochemical cycle KW - spatial distribution KW - geographic information systems KW - pedotransfer functions KW - ice KW - carbon KW - soil surveys KW - data bases KW - surveys KW - information systems KW - ground ice KW - carbon cycle KW - organic carbon KW - geochemistry KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524609889?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Earth+System+Science+Data+%28ESSD%29&rft.atitle=A+new+data+set+for+estimating+organic+carbon+storage+to+3+m+depth+in+soils+of+the+northern+circumpolar+permafrost+region&rft.au=Hugelius%2C+G%3BBockheim%2C+J+G%3BCamill%2C+P%3BElberling%2C+B%3BGrosse%2C+G%3BHarden%2C+J+W%3BJohnson%2C+K%3BJorgenson%2C+T%3BKoven%2C+C+D%3BKuhry%2C+P%3BMichaelson%2C+G%3BMishra%2C+U%3BPalmtag%2C+J%3BPing%2C+C+L%3BO%27Donnell%2C+J%3BSchirrmeister%2C+L%3BSchuur%2C+E+A+G%3BSheng%2C+Y%3BSmith%2C+L+C%3BStrauss%2C+J%3BYu%2C+Z&rft.aulast=Hugelius&rft.aufirst=G&rft.date=2013-01-01&rft.volume=5&rft.issue=2&rft.spage=393&rft.isbn=&rft.btitle=&rft.title=Earth+System+Science+Data+%28ESSD%29&rft.issn=18663508&rft_id=info:doi/10.5194%2Fessd-5-393-2013 L2 - http://www.earth-syst-sci-data.net/volumes_and_issues.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 41 N1 - Document feature - illus. incl. 4 tables, sketch maps N1 - Last updated - 2014-05-15 N1 - SubjectsTermNotLitGenreText - Arctic region; carbon; carbon cycle; data bases; data processing; ecosystems; extrapolation; geochemical cycle; geochemistry; geographic information systems; ground ice; ice; information systems; organic carbon; pedons; pedotransfer functions; permafrost; soil surveys; soils; spatial distribution; surveys DO - http://dx.doi.org/10.5194/essd-5-393-2013 ER - TY - JOUR T1 - Hot CD-MUSIC AN - 1510395133; 2014-019420 AB - Among the many seminal contributions of Professor van Riemsdijk is the CD-MUSIC model, which was developed in collaboration with Professor Hiemstra, and has remained the state-of-the-art Surface Complexation Model since its publication in 1996[1]. Also in the mid-1990's our group began investigating ion adsorption phenomena (primarily cations) over a wide range of temperatures extending into the hydrothermal regime (10-250 degrees C), mostly on rutile, but also on several other metal oxides[2]. More recently, we have also complimented these macroscopic data with a variety of molecular-level information, including X-ray synchotron experiments, and static DFT as well as classical molecular dynamics (MD) simulations. CD-MUSIC has proven to be a sturdy framework within which we have been able to coherently interpret this assortment of data[3,4]. This contribution will summarize our efforts to rationalize adsorption data for rutile to 250 degrees C within the CD-MUSIC model framework with particular focus on Sr (super 2+) and Zn (super 2+) . Our classical MD simulations suggest that the enhanced adsorption observed macroscopically as temperature increases is due to adsorbed cations moving closer to the surface and shedding more bulk hydration water in the process. CD-MUSIC can mimic this behavior although the agreement is not perfect, suggesting extensions to CD-MUSIC may be warranted. JF - Mineralogical Magazine AU - Machesky, M L AU - Wesolowski, D J AU - Ridley, M K AU - Predota, M AU - Zhang, Z AU - Fenter, P A AU - Kubicki, J D AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 1663 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - zinc KW - alkaline earth metals KW - complexing KW - adsorption KW - simulation KW - CD-MUSIC model KW - temperature KW - models KW - metals KW - rutile KW - oxides KW - cations KW - strontium KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1510395133?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Hot+CD-MUSIC&rft.au=Machesky%2C+M+L%3BWesolowski%2C+D+J%3BRidley%2C+M+K%3BPredota%2C+M%3BZhang%2C+Z%3BFenter%2C+P+A%3BKubicki%2C+J+D%3BAnonymous&rft.aulast=Machesky&rft.aufirst=M&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=1663&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.13 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 4 N1 - Last updated - 2014-08-14 N1 - SubjectsTermNotLitGenreText - adsorption; alkaline earth metals; cations; CD-MUSIC model; complexing; metals; models; oxides; rutile; simulation; strontium; temperature; zinc DO - http://dx.doi.org/10.1180/minmag.2013.077.5.13 ER - TY - JOUR T1 - Geochemical characteristics and microbial community composition of toxic metal-rich sediments contaminated from mine tailings AN - 1507185619; 2014-016048 AB - The effects of extreme geochemical conditions on microbial community composition were investigated using two distinct sets of sediment samples collected near weathered mine tailings from the Songcheon Au-Ag mine, Korea. One set (SCH) was gray-colored and showed extraordinary geochemical characteristics: As (6.7-11.5%), Pb (1.5-2.1%), Zn (0.1-0.2%), and pH (3.1-3.5). The other set (SCL) was brown-colored and had As (0.3-1.2%), Pb (0.02-0.22%), and Zn (0.01-0.02%) at pH of 2.5-3.1. Terminal Restriction Fragment Length Polymorphism revealed that the bacterial communities in SCL were more diverse than those in SCH. The clones identified in SCL were closely related to acidophilic bacteria within the genus of Acidobacterium (18%), Acidomicrobineae (14%), and Leptospirillum (10%). Most clones in SCH were closely related to Methylobacterium (79%) and Ralstonia (19%), both of which are well-known metal-resistant bacteria. The archaeal community in SCL was relatively simple: Thermogymnomonas (32%) and unclassified Euryachaeota (48%). No archaeal community was detected in SCH sediments. Although total As was extremely high, over 95% of it was in the form of scorodite (FeAsO (sub 4) .2H (sub 2) O), as confirmed by XAFS analysis. Water-soluble As was only approximately 208 and approximately 0.06 ppm in SCH and SCL, respectively, which is not known to be toxic to bacteria; As(V) as much as 1000-1300 ppm did not influence bacterial growth. Because As was present in an oxidized and stable form it is likely that other metals released from the sediment were responsible for the differences in microbial community structure (e.g., water soluble Zn was approximately 234 and approximately 6.8 ppm in SCH ad SCL, respectively). JF - Mineralogical Magazine AU - Kwon, Man Jae AU - Ham, Baknoon AU - Hwang, Yunho AU - Choi, Jaeyoung AU - Boyanov, Maxim AU - Kemner, Ken AU - O'Loughlin, Edward AU - Yang, Jung-Seok AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 1533 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - toxic materials KW - mine waste KW - Far East KW - communities KW - Archaea KW - XAFS spectra KW - pollution KW - Korea KW - X-ray spectra KW - silver ores KW - metals KW - bacteria KW - sediments KW - metal ores KW - gold ores KW - spectra KW - Songcheon Mine KW - chemical composition KW - Asia KW - tailings KW - pH KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1507185619?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Geochemical+characteristics+and+microbial+community+composition+of+toxic+metal-rich+sediments+contaminated+from+mine+tailings&rft.au=Kwon%2C+Man+Jae%3BHam%2C+Baknoon%3BHwang%2C+Yunho%3BChoi%2C+Jaeyoung%3BBoyanov%2C+Maxim%3BKemner%2C+Ken%3BO%27Loughlin%2C+Edward%3BYang%2C+Jung-Seok%3BAnonymous&rft.aulast=Kwon&rft.aufirst=Man&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=1533&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.11 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-03-14 N1 - SubjectsTermNotLitGenreText - Archaea; Asia; bacteria; chemical composition; communities; Far East; gold ores; Korea; metal ores; metals; mine waste; pH; pollution; sediments; silver ores; Songcheon Mine; spectra; tailings; toxic materials; X-ray spectra; XAFS spectra DO - http://dx.doi.org/10.1180/minmag.2013.077.5.11 ER - TY - JOUR T1 - Pb and Zn coprecipitation with iron oxyhydroxide nano-particles AN - 1507185618; 2014-016074 AB - Pb and Zn coprecipitation with Fe (super 3+) was studied with sorption edge measurements, desorption experiments, paired coprecipitation - adsorption experiments for comparison, sorbent aging, EXAFS, High Resolution Transmission and Analytical Electron Microscopy (HR TEM-AEM), and geochemical modeling. Coprecipitation of Pb with ferric oxyhydroxides occurred at approximately pH 4 and for Zn at pH approximately 5, about 0.5-1.0 pH unit higher than Fe (super 3+) precipitation. Coprecipitation is more efficient than adsorption in removing Pb and Zn from aqueous solutions at similar sorbate/sorbent ratios and pH. HRTEM of the Pb-Fe and Zn-Fe coprecipitates shows a mixture of 2 to 6 nm diameter 2-line ferrihydrite spheres. The co-refinement of the Pb LIII-edge and the Fe Kedge EXAFS spectra suggested that Pb formed a solid solution in the Pb-Fe coprecipitate. Desorption experiments show that more Pb (super 2+) was released from loaded sorbents collected from adsorption experiments than from Pb to Fe coprecipitates at dilute EDTA concentrations. Desorbed Pb (super 2+) versus dissolved Fe (super 3+) data show a linear relationship for coprecipitation desorption experiments but a parabolic relationship for adsorption experiments. Based on these results, we hypothesize that Pb (super 2+) was first adsorbed onto the nanometer-sized, metastable, iron oxyhydroxide polymers of 2-line ferrihydrite with domain size of 2-3 nm. As these nano-particles assembled into larger particles, some Pb (super 2+) was trapped in the iron oxyhydroxide structure and re-arranged to form solid solutions. Our study shows that coprecipitation and adsorption experiments resulted in different Pb and Zn incorporation mechanisms, which could result in different mobility, bioavailability, and long-term stability of trace metals in the environment. JF - Mineralogical Magazine AU - Lu, Peng AU - Kelly, Shelly AU - Zhu, Chen AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 1646 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - zinc KW - experimental studies KW - oxyhydroxides KW - solutes KW - lead KW - bioavailability KW - adsorption KW - TEM data KW - iron KW - hydroxides KW - ferric iron KW - precipitation KW - metals KW - oxides KW - trace metals KW - nanoparticles KW - pH KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1507185618?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Pb+and+Zn+coprecipitation+with+iron+oxyhydroxide+nano-particles&rft.au=Lu%2C+Peng%3BKelly%2C+Shelly%3BZhu%2C+Chen%3BAnonymous&rft.aulast=Lu&rft.aufirst=Peng&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=1646&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.12 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 3 N1 - Last updated - 2014-03-14 N1 - SubjectsTermNotLitGenreText - adsorption; bioavailability; experimental studies; ferric iron; hydroxides; iron; lead; metals; nanoparticles; oxides; oxyhydroxides; pH; precipitation; solutes; TEM data; trace metals; zinc DO - http://dx.doi.org/10.1180/minmag.2013.077.5.12 ER - TY - JOUR T1 - The reduction of elemental sulfur by metal-reducing bacteria under alkaline conditions AN - 1502291807; 2014-012553 AB - Metal-reducing bacteria such as Shewanella, Desulfuromonas, and Geobacter are abundant in many terrestrial environments, where their respiration is often linked to the reduction of ferric iron (Fe (super III) ). Under alkaline conditions, however, the reduction of Fe (super III) ceases to be energetically favorable and suggests that under these conditions, metal reducers must utilize alternate electron acceptors. One possible alternative is elemental sulfur (S (super 0) ), which is produced when ferric minerals react with dissolved sulfide such as that created by microbial sulfate reduction. Using geochemical modeling, we show that unlike the reduction of ferric minerals, the reduction of S (super 0) becomes more energetically favorable as pH increases. We also show experimentally that, under alkaline conditions, Shewanella oneidensis is capable of reducing S (super 0) to sulfide, which then reacts with ferric minerals to form Fe (super II) . We suggest that in slightly alkaline environments where both sulfate and Fe (super III) are available, metal-reducing bacteria may survive primarily by respiring the S (super 0) created by sulfate-reducing bacteria. JF - Mineralogical Magazine AU - Flynn, Theodore M AU - O'Loughlin, Edward J AU - Kemner, Kenneth M AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 1097 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - ferric iron KW - biogenic processes KW - metals KW - biochemistry KW - bacteria KW - sulfur KW - alkalinity KW - reduction KW - sulfides KW - pH KW - iron KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1502291807?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=The+reduction+of+elemental+sulfur+by+metal-reducing+bacteria+under+alkaline+conditions&rft.au=Flynn%2C+Theodore+M%3BO%27Loughlin%2C+Edward+J%3BKemner%2C+Kenneth+M%3BAnonymous&rft.aulast=Flynn&rft.aufirst=Theodore&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=1097&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.6 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-02-27 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - alkalinity; bacteria; biochemistry; biogenic processes; ferric iron; iron; metals; pH; reduction; sulfides; sulfur DO - http://dx.doi.org/10.1180/minmag.2013.077.5.6 ER - TY - JOUR T1 - Reduction of aqueous U (super VI) by Fe (super II) ; effect of Ti (super IV) on the speciation of U (super IV) AN - 1492586333; 2014-005793 AB - The solubility and mobility of uranium, a radionuclide contaminant at many sites, is highly dependent on its valence state and speciation. Transformation of aqueous U(VI) to U(IV) under the (bio-)reducing conditions found in many subsurface environments can decrease U solubility due to the precipitation of U(IV) dioxide (uraninite), a process that has been studied extensively for uranium remediation. However, recent evidence suggests that U(VI) reduction can produce complexed U(IV) species in the solid phase, such as U(IV)-phosphate precipitates or surface-adsorbed U(IV) atoms. The molecular speciation and the stability of non-uraninite U(IV) phases is poorly understood, even though this knowledge is essential in predicting uranium behavior at contaminated sites or in the design of nuclear waste repositories. As part of understanding uranium transformations under iron reducing conditions, we examined the reduction of U(VI) by Fe(II) in the presence of Ti(IV). Ti(IV) is commonly present in natural magnetite and has been observed in the magnetic sediment fraction at the Hanford nuclear site. Titanium-doped magnetite nanoparticles of varying Ti content (Fe (sub 3-x) Ti (sub x) O (sub 4) , 0 40 kg) has precluded its use in ice core science to date. Air was extracted on site from four 250 kg polar ice samples obtained from 5-15 m below the surface of Taylor Glacier, McMurdo Dry Valleys, Antarctica. Krypton was separated from the air and dated using Atom Trap Trace Analysis. The (super 81) Kr radiometric ages agree with independent stratigraphic dating techniques within 6 ka. (super 85) Kr analysis shows that the samples are free of modern air contamination, validating our sampling strategy and experimental methods. We show that ice from the Eemian interglacial (130-120 ka BP) can be found in abundance near the surface of Taylor Glacier. Our study paves the way for reliable radiometric dating of ancient ice in BIAs and margin sites, greatly enhancing their scientific value as archives of old ice and meteorites. As sample size requirements continue to decrease, ice core (super 81) Kr dating might be a future possibility. JF - Mineralogical Magazine AU - Buizert, C AU - Baggenstos, D AU - Jiang, W AU - Purtschert, R AU - Petrenko, V V AU - Brook, E J AU - Lu, Z T AU - Mueller, P AU - Severinghaus, J P AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 790 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - technology KW - Taylor Glacier KW - Quaternary KW - isotopes KW - krypton KW - Holocene KW - Cenozoic KW - Kr-81 KW - radioactive isotopes KW - Antarctica KW - sampling KW - dates KW - noble gases KW - ice KW - age KW - absolute age KW - 03:Geochronology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492585641?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Radiometric+%28super+81%29+Kr+dating+reveals+120%2C000+year+old+ice+at+Taylor+Glacier%2C+Antarctica&rft.au=Buizert%2C+C%3BBaggenstos%2C+D%3BJiang%2C+W%3BPurtschert%2C+R%3BPetrenko%2C+V+V%3BBrook%2C+E+J%3BLu%2C+Z+T%3BMueller%2C+P%3BSeveringhaus%2C+J+P%3BAnonymous&rft.aulast=Buizert&rft.aufirst=C&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=790&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.2 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 2 N1 - Last updated - 2014-01-30 N1 - SubjectsTermNotLitGenreText - absolute age; age; Antarctica; Cenozoic; dates; Holocene; ice; isotopes; Kr-81; krypton; noble gases; Quaternary; radioactive isotopes; sampling; Taylor Glacier; technology DO - http://dx.doi.org/10.1180/minmag.2013.077.5.2 ER - TY - JOUR T1 - In situ characterization of Grade 92 steel during tensile deformation using concurrent high energy X-ray diffraction and small angle X-ray scattering AN - 1475542203; 18796831 AB - The tensile deformation in Grade 92 steel was studied in situ using simultaneous high energy X-ray diffraction (HE-XRD), radiography, and small angle X-ray scattering (SAXS) at room temperature (RT), 400, and 650 degree C. Temperature-dependent elastic properties, i.e. Young's modulus and Poisson's ratio, were measured for alpha-Fe matrix, M(23)C(6) and Nb(C,N) phases in various crystallographic orientation. Significant differences in the evolution of lattice strain, peak broadening/sharpening, and void development in the alpha-Fe matrix, M(23)C(6) and Nb(C,N) precipitates revealed markedly different deformation and damage mechanisms at low and high temperature in the alloy. The strengthening effect of each type of precipitates measured by lattice strain agrees with the dislocation pile-up model at room temperature, while a different dislocation behavior was observed at 650 degree C. Void volume fraction as a function of strain measured by SAXS can be described by a classic void nucleation and growth model at room temperature but not at 650 degree C, implying a different damage process at high temperature. JF - Journal of Nuclear Materials AU - Wang, Leyun AU - Li, Meimei AU - Aimer, Jonathan AD - Argonne National Laboratory, 9700 S Cass Ave., Argonne, IL 60439, USA, leyunwang@anl.gov Y1 - 2013 PY - 2013 DA - 2013 SP - 81 EP - 90 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 440 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Chromium molybdenum steels KW - 92 KW - Energy KW - High temperature KW - Radioactive materials KW - Temperature KW - Alloys KW - Steel KW - Radiography KW - X-ray diffraction KW - Deformation KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475542203?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=In+situ+characterization+of+Grade+92+steel+during+tensile+deformation+using+concurrent+high+energy+X-ray+diffraction+and+small+angle+X-ray+scattering&rft.au=Wang%2C+Leyun%3BLi%2C+Meimei%3BAimer%2C+Jonathan&rft.aulast=Wang&rft.aufirst=Leyun&rft.date=2013-01-01&rft.volume=440&rft.issue=1-3&rft.spage=81&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 44 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - High temperature; Energy; Radioactive materials; Temperature; Alloys; Radiography; Steel; X-ray diffraction; Deformation ER - TY - JOUR T1 - Irradiation effects in UO(2) and CeO(2) AN - 1475540821; 18796969 AB - Single crystal CeO(2), as a surrogate material to UO(2). was irradiated with 500 keV xenon ions at 800 degree C while being observed using in situ transmission electron microscopy (TEM). Experimental results show the formation and growth of defect clusters including dislocation loops and cavities as a function of increasing atomic displacement dose. At high dose, the dislocation loop structure evolves into an extended dislocation line structure, which appears to remain stable to the high dose levels examined in this study. A high concentration of cavities was also present in the microstructure. Despite high atomic displacement doses, the specimen remained crystalline to a cumulated dose of 5 x 10(15) ions/cm(2), which is consistent with the known stability of the fluorite structure under high dose irradiation. Kinetic Monte Carlo calculations show that oxygen mobility is substantially higher in hypo-stoichiometric UO(2)/CeO(2) than hyper-stoichiometric systems. This result is consistent with the ability of irradiation damage to recover even at intermediate irradiation temperatures. JF - Journal of Nuclear Materials AU - Ye, Bei AU - Oaks, Aaron AU - Kirk, Mark AU - Yun, Di AU - Chen, Wei-Ying AU - Holtzman, Benjamin AU - Stubbins, James F AD - Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana - Champaign, Talbot Laboratory, 104 South Wright Street, Urbana, IL 61801, USA, bye@anl.gov Y1 - 2013 PY - 2013 DA - 2013 SP - 525 EP - 529 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 441 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Monte Carlo simulation KW - Ions KW - Oxygen KW - Xenon KW - Mobility KW - Irradiation KW - Kinetics KW - Microscopy KW - Radioactive materials KW - Temperature KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475540821?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Irradiation+effects+in+UO%282%29+and+CeO%282%29&rft.au=Ye%2C+Bei%3BOaks%2C+Aaron%3BKirk%2C+Mark%3BYun%2C+Di%3BChen%2C+Wei-Ying%3BHoltzman%2C+Benjamin%3BStubbins%2C+James+F&rft.aulast=Ye&rft.aufirst=Bei&rft.date=2013-01-01&rft.volume=441&rft.issue=1-3&rft.spage=525&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 17 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Monte Carlo simulation; Oxygen; Ions; Xenon; Mobility; Kinetics; Irradiation; Radioactive materials; Microscopy; Temperature ER - TY - JOUR T1 - Study of irradiated mod.9Cr-1Mo steel by synchrotron extended X-ray absorption fine structure AN - 1475539536; 18796987 AB - Synchrotron extended X-ray absorption fine structure (EXAFS) spectroscopy measurements were performed to study the dose dependence of and alloying effects on irradiation-induced changes in the local atomic environments in a mod.9Cr-1Mo ferritic-martensitic steel. The measurements were carried out at room temperature on non-irradiated and irradiated specimens exposed to 1, 4, and 10 displacement per atom (dpa) at 40-70 degree C. The EXAFS data for Fe, Cr, Mo, and Nb K-edges were recorded, and the local structure close to the X-ray absorbing atom was determined. Irradiation caused significant reductions in peak amplitude in the Fe, Mo and Nb K-edge Fourier transformed EXAFS. The data showed a systematic decrease in coordination number of neighbor atoms with increasing irradiation dose, and the dose dependence of the coordination loss was dependent on the specific element. The measured damage around Fe sites can be correlated with the dpa value, while the loss of near neighbors around Mo saturated at ~1 dpa. The coordination in the Fe matrix was reduced less by irradiation than either the coordination of Mo in solution or Nb in carbides. It was demonstrated that EXAFS can provide a detailed, atomic level description of radiation damage in complex alloy systems. JF - Journal of Nuclear Materials AU - Li, Meimei AU - Olive, Dan AU - Trenikhina, Yulia AU - Ganegoda, Hasitha AU - Terry, Jeff AU - Maloy, Stuart A AD - Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439-4838, United States, mli@anl.gov Y1 - 2013 PY - 2013 DA - 2013 SP - 674 EP - 680 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 441 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Chromium molybdenum steels KW - 9Cr-1Mo KW - Irradiation KW - Radioactive materials KW - Absorption KW - Temperature KW - Alloys KW - Steel KW - Spectroscopy KW - ENA 14:Radiological Contamination UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475539536?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Study+of+irradiated+mod.9Cr-1Mo+steel+by+synchrotron+extended+X-ray+absorption+fine+structure&rft.au=Li%2C+Meimei%3BOlive%2C+Dan%3BTrenikhina%2C+Yulia%3BGanegoda%2C+Hasitha%3BTerry%2C+Jeff%3BMaloy%2C+Stuart+A&rft.aulast=Li&rft.aufirst=Meimei&rft.date=2013-01-01&rft.volume=441&rft.issue=1-3&rft.spage=674&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 27 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Irradiation; Radioactive materials; Temperature; Absorption; Alloys; Steel; Spectroscopy ER - TY - JOUR T1 - First-principles study of structural, elastic, electronic, vibrational and thermodynamic properties of UN AN - 1475532692; 18796829 AB - The structural, elastic, electronic, phonon and thermodynamic properties of UN are studied by density functional theory (DFT) within local-density approximation (LDA) and generalized gradient approximation (GGA), and CGA + U. The GGA calculations of the ground state structural and elastic properties of UN show an overall better agreement with experimental data compared to LDA or GGA + U. The melting temperature of UN (T(m)) is estimated from the calculated elastic constant, with GGA predicting T(m) = 2944 (plus-or-minus sign) 300 K, in excellent agreement with experimental data. The calculated phonon dispersions of UN agree well with the low temperature measurements. Furthermore, the thermodynamic properties of UN are studied using quasiharmonic approximation by including both lattice vibrational and thermal electronic contributions. The predicted thermodynamic properties, such as enthalpy, entropy, Gibbs energy, heat capacity and thermal expansion coefficient, agree well with experimental data. The derived thermodynamic functions of UN are useful to the thermodynamic modeling of phase stabilities in UN-based materials. This study shows that the thermal electronic energy and entropy due to U 5f electrons are important to describe the free energy of UN, due to the metallic character of UN. The calculated thermodynamic properties also suggest that the anharmonic effects are less important in UN even at high-temperature. JF - Journal of Nuclear Materials AU - Mei, Zhi-Gang AU - Stan, Marius AU - Pichler, Benjamin AD - Nuclear Engineering Division, Argonne National Laboratory, Argonne, IL 60439, United States, zmei@anl.gov Y1 - 2013 PY - 2013 DA - 2013 SP - 63 EP - 69 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 440 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Thermal expansion KW - Low temperature KW - Thermodynamics KW - Energy KW - Radioactive materials KW - Temperature KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475532692?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=First-principles+study+of+structural%2C+elastic%2C+electronic%2C+vibrational+and+thermodynamic+properties+of+UN&rft.au=Mei%2C+Zhi-Gang%3BStan%2C+Marius%3BPichler%2C+Benjamin&rft.aulast=Mei&rft.aufirst=Zhi-Gang&rft.date=2013-01-01&rft.volume=440&rft.issue=1-3&rft.spage=63&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 54 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Low temperature; Thermal expansion; Thermodynamics; Energy; Radioactive materials; Temperature ER - TY - JOUR T1 - U-Mo alloy fuel for TRU-burning advanced fast reactors AN - 1475532135; 18796968 AB - The use of U-Mo instead of U-Zr as the base alloy fuel for transuranics (TRU)-burning advanced fast reactors is assessed in several aspects. While the replacement of Zr with Mo involves no significant differences in terms of neutron physics (core design), U-TRU-Mo does provide advantages. U-TRU-Mo has lower TRU migration to cladding because of its simpler phase diagram, is advantageous in safety margin due to its higher thermal conductivity and better fuel-cladding-chemical-interaction resistance. High fuel swelling data, obtained at low temperatures, available in the literature are not directly applicable to the TRU-burning advanced fast reactors. The potential high swelling can also be controlled when strong cladding and degassing are used as are adopted for typical U-Pu-Zr fuel. Results and detailed analysis are presented in this paper, indicating the benefits of U-Mo base alloy fuel in TRU-burning advanced fast reactors. JF - Journal of Nuclear Materials AU - Kim, Yeon Soo AU - Hofman, G L AU - Yacout, A M AU - Kim, T K AD - Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA, yskim@anl.gov Y1 - 2013 PY - 2013 DA - 2013 SP - 520 EP - 524 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 441 IS - 1-3 SN - 0022-3115, 0022-3115 KW - Environment Abstracts KW - Nuclear reactors KW - Low temperature KW - Safety engineering KW - Thermal conductivity KW - Fuels KW - Nuclear fuels KW - Radioactive materials KW - Alloys KW - Transuranics KW - Degassing KW - Migration KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1475532135?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=U-Mo+alloy+fuel+for+TRU-burning+advanced+fast+reactors&rft.au=Kim%2C+Yeon+Soo%3BHofman%2C+G+L%3BYacout%2C+A+M%3BKim%2C+T+K&rft.aulast=Kim&rft.aufirst=Yeon&rft.date=2013-01-01&rft.volume=441&rft.issue=1-3&rft.spage=520&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 18 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Low temperature; Nuclear reactors; Thermal conductivity; Safety engineering; Fuels; Radioactive materials; Nuclear fuels; Alloys; Degassing; Transuranics; Migration ER - TY - JOUR T1 - New lesson learned about stellar nucleosynthesis form barium isotopic composition of presolar SiCs from the Murchison Meteorite AN - 1469622065; 2013-097684 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Liu, N AU - Savina, M R AU - Davis, A M AU - Gallino, R AU - Straniero, O AU - Gyngard, Frank AU - Pellin, M AU - Willingham, D G AU - Dauphas, N AU - Pignatari, M AU - Herwig, F AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2507 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - stony meteorites KW - isotopes KW - mass spectra KW - carbides KW - stable isotopes KW - Murchison Meteorite KW - meteorites KW - silicon carbide KW - presolar grains KW - barium KW - carbon KW - resonance ionization mass spectra KW - alloys KW - spectra KW - chondrites KW - alkaline earth metals KW - AGB stars KW - cosmochemistry KW - nucleosynthesis KW - carbonaceous chondrites KW - stars KW - metals KW - type AB presolar grains KW - C-13 KW - CM chondrites KW - 05B:Petrology of meteorites and tektites UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469622065?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=New+lesson+learned+about+stellar+nucleosynthesis+form+barium+isotopic+composition+of+presolar+SiCs+from+the+Murchison+Meteorite&rft.au=Liu%2C+N%3BSavina%2C+M+R%3BDavis%2C+A+M%3BGallino%2C+R%3BStraniero%2C+O%3BGyngard%2C+Frank%3BPellin%2C+M%3BWillingham%2C+D+G%3BDauphas%2C+N%3BPignatari%2C+M%3BHerwig%2C+F%3BAnonymous&rft.aulast=Liu&rft.aufirst=N&rft.date=2013-01-01&rft.volume=44&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/2507.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 17 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Sept. 6, 2013 N1 - Last updated - 2013-12-20 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - AGB stars; alkaline earth metals; alloys; barium; C-13; carbides; carbon; carbonaceous chondrites; chondrites; CM chondrites; cosmochemistry; isotopes; mass spectra; metals; meteorites; Murchison Meteorite; nucleosynthesis; presolar grains; resonance ionization mass spectra; silicon carbide; spectra; stable isotopes; stars; stony meteorites; type AB presolar grains ER - TY - JOUR T1 - Gas cluster ion beam cleaning of Genesis solar wind samples; further steps in the method evaluation AN - 1469616894; 2013-100200 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Veryovkin, I V AU - Schmeling, M AU - Toyoda, N AU - Mashita, T AU - Yamada, I AU - Jurewicz, A J G AU - Baryshev, S V AU - Tripa, C E AU - Zinovev, Z V AU - Burnett, D S AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2970 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - experimental studies KW - irradiation KW - Genesis Mission KW - solar wind KW - characterization KW - techniques KW - cleaning methods KW - samples KW - evaluation KW - sample preparation KW - resonance-ionization mass spectroscopy KW - total reflection X-ray fluorescence KW - gas cluster ion beam cleaning KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469616894?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Gas+cluster+ion+beam+cleaning+of+Genesis+solar+wind+samples%3B+further+steps+in+the+method+evaluation&rft.au=Veryovkin%2C+I+V%3BSchmeling%2C+M%3BToyoda%2C+N%3BMashita%2C+T%3BYamada%2C+I%3BJurewicz%2C+A+J+G%3BBaryshev%2C+S+V%3BTripa%2C+C+E%3BZinovev%2C+Z+V%3BBurnett%2C+D+S%3BAnonymous&rft.aulast=Veryovkin&rft.aufirst=I&rft.date=2013-01-01&rft.volume=2013&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/2970.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 5 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on July 5, 2013 N1 - Last updated - 2013-12-20 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - characterization; cleaning methods; evaluation; experimental studies; gas cluster ion beam cleaning; Genesis Mission; irradiation; resonance-ionization mass spectroscopy; sample preparation; samples; solar wind; techniques; total reflection X-ray fluorescence ER - TY - JOUR T1 - Genesis sodium and potassium bulk solar wind fluences AN - 1469614145; 2013-100201 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Rieck, K D AU - Jurewicz, A J G AU - Burnett, D S AU - Hervig, R L AU - Veryovkin, I V AU - Miller, C S AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 3030 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - methods KW - Genesis Mission KW - ion probe data KW - isotopes KW - solar wind KW - alkali metals KW - mass spectra KW - backside depth profiling KW - sodium KW - measurement KW - metals KW - potassium KW - depth profiling KW - Na-23 KW - spectra KW - K-39 KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469614145?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Genesis+sodium+and+potassium+bulk+solar+wind+fluences&rft.au=Rieck%2C+K+D%3BJurewicz%2C+A+J+G%3BBurnett%2C+D+S%3BHervig%2C+R+L%3BVeryovkin%2C+I+V%3BMiller%2C+C+S%3BAnonymous&rft.aulast=Rieck&rft.aufirst=K&rft.date=2013-01-01&rft.volume=44&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/3030.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on July 5, 2013 N1 - Last updated - 2013-12-20 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkali metals; backside depth profiling; depth profiling; Genesis Mission; ion probe data; isotopes; K-39; mass spectra; measurement; metals; methods; Na-23; potassium; sodium; solar wind; spectra ER - TY - JOUR T1 - MC-ICPMS and NRIXS; a stereo view of iron isotopic fractionation in silicic magmas AN - 1469613992; 2013-100583 AB - Silicic rocks show trends of increasing delta (super 56) Fe values with increasing SiO (sub 2) content. These trends have been ascribed to Soret effect, fluid exsolution, and magmatic differentiation. To understand the cause of Fe isotopic variations in silicic magmas, we measured the Mg, Fe, Zn, and U isotopic compositions of a range of migmatites, granites, and pegmatites with well-characterized petrologic and geochemical contexts. No clear positive correlation is found between the isotopic compositions of Mg, U and Fe, which rules out the process of Soret diffusion. Zinc can easily be mobilized by aqueous fluids as chloride complexes. Pegmatites and some granitic rocks with high delta (super 56) Fe values also have high delta (super 66) Zn values. However, some granites with high delta (super 56) Fe values have unfractionated delta (super 66) Zn values and were presumably poor in fluids (A-type granitoids). For these samples, iron isotopic fractionation during magma differentiation is the most likely interpretation. We used the technique of Nuclear Resonant Inelastic X-ray Spectroscopy at the Advanced Photon Source to measure the mean force constant of Fe in basalt, andesite, dacite, and rhyolite glasses. We find a sudden increase in the force constant of Fe (super 2+) from dacite to rhyolite. The b-factors derived from these force constants were used in a model of magma differentiation using Rhyolite-MELTS. The correlation between delta (super 56) Fe and SiO (sub 2) is well explained by magmatic differentiation. JF - Mineralogical Magazine AU - Dauphas, N AU - Roskosz, M AU - Telus, M AU - Hu, M Y AU - Alp, E E AU - Moynier, F AU - Sio, C K AU - Tissot, F L H AU - Teng, F Z AU - Neuville, D AU - Nabelek, P I AU - Craddock, P AU - Groat, L A AU - Zhao, J AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 948 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - isotope fractionation KW - isotopes KW - acidic magmas KW - pegmatite KW - isotope ratios KW - igneous rocks KW - granites KW - differentiation KW - mass spectra KW - felsic composition KW - stable isotopes KW - iron KW - ICP mass spectra KW - plutonic rocks KW - silica KW - migmatites KW - metals KW - magmas KW - metamorphic rocks KW - spectra KW - exsolution KW - Fe-56/Fe-54 KW - 02D:Isotope geochemistry KW - 05A:Igneous and metamorphic petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469613992?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=MC-ICPMS+and+NRIXS%3B+a+stereo+view+of+iron+isotopic+fractionation+in+silicic+magmas&rft.au=Dauphas%2C+N%3BRoskosz%2C+M%3BTelus%2C+M%3BHu%2C+M+Y%3BAlp%2C+E+E%3BMoynier%2C+F%3BSio%2C+C+K%3BTissot%2C+F+L+H%3BTeng%2C+F+Z%3BNeuville%2C+D%3BNabelek%2C+P+I%3BCraddock%2C+P%3BGroat%2C+L+A%3BZhao%2C+J%3BAnonymous&rft.aulast=Dauphas&rft.aufirst=N&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=948&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.4 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2013-01-01 N1 - Number of references - 5 N1 - Last updated - 2013-12-20 N1 - SubjectsTermNotLitGenreText - acidic magmas; differentiation; exsolution; Fe-56/Fe-54; felsic composition; granites; ICP mass spectra; igneous rocks; iron; isotope fractionation; isotope ratios; isotopes; magmas; mass spectra; metals; metamorphic rocks; migmatites; pegmatite; plutonic rocks; silica; spectra; stable isotopes DO - http://dx.doi.org/10.1180/minmag.2013.077.5.4 ER - TY - JOUR T1 - Application of CO (sub 2) snow jet cleaning in conjunction with laboratory based total reflection x-ray fluorescence spectrometry for Genesis solar wind samples AN - 1469613975; 2013-100198 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Schmeling, M AU - Burnett, D S AU - Allton, J H AU - Rodriguez, M AU - Tripa, C E AU - Veryovkin, I V AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 EP - Abstract 2465 PB - Lunar and Planetary Science Conference, Houston, TX VL - 44 KW - Genesis Mission KW - solar wind KW - techniques KW - cleaning methods KW - interplanetary space KW - iron KW - laboratory studies KW - sample preparation KW - metals KW - X-ray fluorescence spectra KW - spectra KW - carbon dioxide snow jet cleaning KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469613975?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Application+of+CO+%28sub+2%29+snow+jet+cleaning+in+conjunction+with+laboratory+based+total+reflection+x-ray+fluorescence+spectrometry+for+Genesis+solar+wind+samples&rft.au=Schmeling%2C+M%3BBurnett%2C+D+S%3BAllton%2C+J+H%3BRodriguez%2C+M%3BTripa%2C+C+E%3BVeryovkin%2C+I+V%3BAnonymous&rft.aulast=Schmeling&rft.aufirst=M&rft.date=2013-01-01&rft.volume=44&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2013/pdf/2465.pdf LA - English DB - GeoRef N1 - Conference title - 44th lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 7 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on July 5, 2013 N1 - Last updated - 2013-12-20 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - carbon dioxide snow jet cleaning; cleaning methods; Genesis Mission; interplanetary space; iron; laboratory studies; metals; sample preparation; solar wind; spectra; techniques; X-ray fluorescence spectra ER - TY - JOUR T1 - First-principles modeling of hydrolysis reactions for nuclear waste glass forms AN - 1469613776; 2013-100753 AB - First-principles informed models of dissolution behavior of glass waste forms in aqueous environments can potentially can have potentially lead to reduced uncertainties in predictions of long-term behavior. As a starting point, we have developed a model using a well characterized crystalline aluminosilicate (orthoclase) that has a known structure, but possess key characteristics of waste form glass, such as compositions with multiple cations, pH dependence and formation of secondary phases in dissolution. A Kinetic Monte Carlo study based on first-principles calculations of barriers for water reactions at neutral, protonated and deprotonated sites provided information on the overall dissolution rate and rate-limiting steps. The dissolution rate far from equilibrium is compared to experiments. We have also extended this approach to multi-component glasses, where we calculated reaction energies and barriers from first-principles. Insights into the molecular-level mechanisms of glass dissolution will be used for a coarser scale modeling. This work is aimed at better understanding of the dissolution behavior and development of predictive models for dissolution rates. JF - Mineralogical Magazine AU - Zapol, P AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 2581 PB - Mineralogical Society, London VL - 77 IS - 5 SN - 0026-461X, 0026-461X KW - silicates KW - volcanic rocks KW - glasses KW - solutions KW - igneous rocks KW - hydrolysis KW - solution KW - radioactive waste KW - models KW - orthoclase KW - chemical reactions KW - alkali feldspar KW - vitrification KW - framework silicates KW - waste disposal KW - geochemistry KW - feldspar group KW - pH KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469613776?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=First-principles+modeling+of+hydrolysis+reactions+for+nuclear+waste+glass+forms&rft.au=Zapol%2C+P%3BAnonymous&rft.aulast=Zapol&rft.aufirst=P&rft.date=2013-01-01&rft.volume=77&rft.issue=5&rft.spage=2581&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/10.1180%2Fminmag.2013.077.5.26 L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2013 N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2013-01-01 N1 - Last updated - 2013-12-20 N1 - SubjectsTermNotLitGenreText - alkali feldspar; chemical reactions; feldspar group; framework silicates; geochemistry; glasses; hydrolysis; igneous rocks; models; orthoclase; pH; radioactive waste; silicates; solution; solutions; vitrification; volcanic rocks; waste disposal DO - http://dx.doi.org/10.1180/minmag.2013.077.5.26 ER - TY - JOUR T1 - Life-cycle energy use and greenhouse gas emissions of production of bioethanol from sorghum in the United States AN - 1443376180; 18677590 AB - Background: The availability of feedstock options is a key to meeting the volumetric requirement of 136.3 billion liters of renewable fuels per year beginning in 2022, as required in the US 2007 Energy Independence and Security Act. Life-cycle greenhouse gas (GHG) emissions of sorghum-based ethanol need to be assessed for sorghum to play a role in meeting that requirement. Results: Multiple sorghum-based ethanol production pathways show diverse well-to-wheels (WTW) energy use and GHG emissions due to differences in energy use and fertilizer use intensity associated with sorghum growth and differences in the ethanol conversion processes. All sorghum-based ethanol pathways can achieve significant fossil energy savings. Relative to GHG emissions from conventional gasoline, grain sorghum-based ethanol can reduce WTW GHG emissions by 35% or 23%, respectively, when wet or dried distillers grains with solubles (DGS) is the co-product and fossil natural gas (FNG) is consumed as the process fuel. The reduction increased to 56% or 55%, respectively, for wet or dried DGS co-production when renewable natural gas (RNG) from anaerobic digestion of animal waste is used as the process fuel. These results do not include land-use change (LUC) GHG emissions, which we take as negligible. If LUC GHG emissions for grain sorghum ethanol as estimated by the US Environmental Protection Agency (EPA) are included (26 g CO sub(2)e/MJ), these reductions when wet DGS is co-produced decrease to 7% or 29% when FNG or RNG is used as the process fuel. Sweet sorghum-based ethanol can reduce GHG emissions by 71% or 72% without or with use of co-produced vinasse as farm fertilizer, respectively, in ethanol plants using only sugar juice to produce ethanol. If both sugar and cellulosic bagasse were used in the future for ethanol production, an ethanol plant with a combined heat and power (CHP) system that supplies all process energy can achieve a GHG emission reduction of 70% or 72%, respectively, without or with vinasse fertigation. Forage sorghum-based ethanol can achieve a 49% WTW GHG emission reduction when ethanol plants meet process energy demands with CHP. In the case of forage sorghum and an integrated sweet sorghum pathway, the use of a portion of feedstock to fuel CHP systems significantly reduces fossil fuel consumption and GHG emissions. Conclusions: This study provides new insight into life-cycle energy use and GHG emissions of multiple sorghum-based ethanol production pathways in the US. Our results show that adding sorghum feedstocks to the existing options for ethanol production could help in meeting the requirements for volumes of renewable, advanced and cellulosic bioethanol production in the US required by the EPA's Renewable Fuel Standard program. JF - Biotechnology for Biofuels AU - Cai, Hao AU - Dunn, Jennifer B AU - Wang, Zhichao AU - Han, Jeongwoo AU - Wang, Michael Q AD - Systems Assessment Group, Energy Systems Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA Y1 - 2013 PY - 2013 DA - 2013 SP - 141 PB - BioMed Central Ltd., Floor 6 London WC1X 8HL United Kingdom VL - 6 IS - 1 SN - 1754-6834, 1754-6834 KW - Biotechnology and Bioengineering Abstracts KW - Grain sorghum KW - Sweet sorghum KW - Forage sorghum KW - Ethanol KW - Life-cycle analysis KW - Greenhouse gas emissions KW - Animal wastes KW - Farms KW - Fossil fuels KW - Gasoline KW - Juices KW - Anaerobic digestion KW - Greenhouses KW - Bagasse KW - Fertilizers KW - Energy KW - Power plants KW - Grain KW - Biofuels KW - Sorghum KW - W 30940:Products UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1443376180?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biotechnology+for+Biofuels&rft.atitle=Life-cycle+energy+use+and+greenhouse+gas+emissions+of+production+of+bioethanol+from+sorghum+in+the+United+States&rft.au=Cai%2C+Hao%3BDunn%2C+Jennifer+B%3BWang%2C+Zhichao%3BHan%2C+Jeongwoo%3BWang%2C+Michael+Q&rft.aulast=Cai&rft.aufirst=Hao&rft.date=2013-01-01&rft.volume=6&rft.issue=1&rft.spage=141&rft.isbn=&rft.btitle=&rft.title=Biotechnology+for+Biofuels&rft.issn=17546834&rft_id=info:doi/10.1186%2F1754-6834-6-141 L2 - http://www.biotechnologyforbiofuels.com/content/6/1/141 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-10-01 N1 - Number of references - 62 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Farms; Animal wastes; Fossil fuels; Gasoline; Juices; Anaerobic digestion; Greenhouses; Fertilizers; Bagasse; Energy; Grain; Power plants; Biofuels; Ethanol; Sorghum DO - http://dx.doi.org/10.1186/1754-6834-6-141 ER - TY - JOUR T1 - Functional microbial diversity explains groundwater chemistry in a pristine aquifer AN - 1412516066; 18238508 AB - Background: The diverse microbial populations that inhabit pristine aquifers are known to catalyze critical in situ biogeochemical reactions, yet little is known about how the structure and diversity of this subsurface community correlates with and impacts upon groundwater chemistry. Herein we examine 8,786 bacterial and 8,166 archaeal 16S rRNA gene sequences from an array of monitoring wells in the Mahomet aquifer of east-central Illinois. Using multivariate statistical analyses we provide a comparative analysis of the relationship between groundwater chemistry and the microbial communities attached to aquifer sediment along with those suspended in groundwater. Results: Statistical analyses of 16S rRNA gene sequences showed a clear distinction between attached and suspended communities; with iron-reducing bacteria far more abundant in attached samples than suspended, while archaeal clones related to groups associated with anaerobic methane oxidation and deep subsurface gold mines (ANME-2D and SAGMEG-1, respectively) distinguished the suspended community from the attached. Within the attached bacterial community, cloned sequences most closely related to the sulfate-reducing Desulfobacter and Desulfobulbus genera represented 20% of the bacterial community in wells where the concentration of sulfate in groundwater was high (> 0.2 mM), compared to only 3% in wells with less sulfate. Sequences related to the genus Geobacter, a genus containing ferric-iron reducers, were of nearly equal abundance (15%) to the sulfate reducers under high sulfate conditions, however their relative abundance increased to 34% when sulfate concentrations were 0.2 mM sulfate. In the suspended fraction of wells where the concentration of sulfate was between 0.03 and 0.2 mM, the archaeal community was dominated by sequences most closely related to the ANME-2D, a group of archaea known for anaerobically oxidizing methane. Based on available energy (...G sub(A)) estimations, results varied little for both sulfate reduction and methanogenesis throughout all wells studied, but could favor anaerobic oxidation of methane (AOM) in wells containing minimal sulfate and dihydrogen, suggesting AOM coupled with H sub(2)-oxidizing organisms such as sulfate or iron reducers could be an important pathway occurring in the Mahomet aquifer. Conclusions: Overall, the results show several distinct factors control the composition of microbial communities in the Mahomet aquifer. Bacteria that respire insoluble substrates such as iron oxides, i.e. Geobacter, comprise a greater abundance of the attached community than the suspended regardless of groundwater chemistry. Differences in community structure driven by the concentration of sulfate point to a clear link between the availability of substrate and the abundance of certain functional groups, particularly iron reducers, sulfate reducers, methanogens, and methanotrophs. Integrating both geochemical and microbiological observations suggest that the relationships between these functional groups could be driven in part by mutualism, especially between ferric-iron and sulfate reducers. JF - BMC Microbiology AU - Flynn, Theodore M AU - Sanford, Robert A AU - Ryu, Hodon AU - Bethke, Craig M AU - Levine, Audrey D AU - Ashbolt, Nicholas J AU - Santo Domingo, Jorge W AD - Biosciences Division, Argonne National Laboratory, Argonne, IL 60439, USA Y1 - 2013 PY - 2013 DA - 2013 SP - 146 PB - BioMed Central Ltd., Middlesex House London W1T 4LB United Kingdom VL - 13 IS - 1 SN - 1471-2180, 1471-2180 KW - Microbiology Abstracts A: Industrial & Applied Microbiology KW - Abundance KW - Archaea KW - Ground water KW - A:01320 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1412516066?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologya&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=BMC+Microbiology&rft.atitle=Functional+microbial+diversity+explains+groundwater+chemistry+in+a+pristine+aquifer&rft.au=Flynn%2C+Theodore+M%3BSanford%2C+Robert+A%3BRyu%2C+Hodon%3BBethke%2C+Craig+M%3BLevine%2C+Audrey+D%3BAshbolt%2C+Nicholas+J%3BSanto+Domingo%2C+Jorge+W&rft.aulast=Flynn&rft.aufirst=Theodore&rft.date=2013-01-01&rft.volume=13&rft.issue=1&rft.spage=146&rft.isbn=&rft.btitle=&rft.title=BMC+Microbiology&rft.issn=14712180&rft_id=info:doi/10.1186%2F1471-2180-13-146 L2 - http://www.biomedcentral.com/1471-2180/13/146 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-07-01 N1 - Number of references - 1 N1 - Last updated - 2014-02-21 N1 - SubjectsTermNotLitGenreText - Ground water; Archaea DO - http://dx.doi.org/10.1186/1471-2180-13-146 ER - TY - JOUR T1 - Land-use change and greenhouse gas emissions from corn and cellulosic ethanol AN - 1367491469; 18083358 AB - Background: The greenhouse gas (GHG) emissions that may accompany land-use change (LUC) from increased biofuel feedstock production are a source of debate in the discussion of drawbacks and advantages of biofuels. Estimates of LUC GHG emissions focus mainly on corn ethanol and vary widely. Increasing the understanding of LUC GHG impacts associated with both corn and cellulosic ethanol will inform the on-going debate concerning their magnitudes and sources of variability. Results: In our study, we estimate LUC GHG emissions for ethanol from four feedstocks: corn, corn stover, switchgrass, and miscanthus. We use new computable general equilibrium (CGE) results for worldwide LUC. U.S. domestic carbon emission factors are from state-level modelling with a surrogate CENTURY model and U.S. Forest Service data. This paper investigates the effect of several key domestic lands carbon content modelling parameters on LUC GHG emissions. International carbon emission factors are from the Woods Hole Research Center. LUC GHG emissions are calculated from these LUCs and carbon content data with Argonne National Laboratory's Carbon Calculator for Land Use Change from Biofuels Production (CCLUB) model. Our results indicate that miscanthus and corn ethanol have the lowest (-10 g CO sub(2)e/MJ) and highest (7.6 g CO sub(2)e/MJ) LUC GHG emissions under base case modelling assumptions. The results for corn ethanol are lower than corresponding results from previous studies. Switchgrass ethanol base case results (2.8 g CO sub(2)e/MJ) were the most influenced by assumptions regarding converted forestlands and the fate of carbon in harvested wood products. They are greater than miscanthus LUC GHG emissions because switchgrass is a lower-yielding crop. Finally, LUC GHG emissions for corn stover are essentially negligible and insensitive to changes in model assumptions. Conclusions: This research provides new insight into the influence of key carbon content modelling variables on LUC GHG emissions associated with the four bioethanol pathways we examined. Our results indicate that LUC GHG emissions may have a smaller contribution to the overall biofuel life cycle than previously thought. Additionally, they highlight the need for future advances in LUC GHG emissions estimation including improvements to CGE models and aboveground and belowground carbon content data. JF - Biotechnology for Biofuels AU - Dunn, Jennifer B AU - Mueller, Steffen AU - Kwon, Ho-young AU - Wang, Michael Q AD - Systems Assessment Group, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA Y1 - 2013 PY - 2013 DA - 2013 SP - 51 PB - BioMed Central Ltd., Floor 6 London WC1X 8HL United Kingdom VL - 6 IS - 1 SN - 1754-6834, 1754-6834 KW - Sustainability Science Abstracts; Biotechnology and Bioengineering Abstracts KW - Ethanol KW - Land-use change KW - Life-cycle analysis KW - Soil carbon content KW - Fuel technology KW - Data processing KW - Wood KW - Life cycle KW - Forests KW - USA, Massachusetts, Woods Hole KW - Crops KW - Land use KW - Greenhouses KW - Models KW - USA KW - Carbon KW - Corn KW - Emissions KW - Greenhouse gases KW - Biotechnology KW - Biofuels KW - Miscanthus KW - M3 1010:Issues in Sustainable Development KW - W 30940:Products UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1367491469?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biotechnology+for+Biofuels&rft.atitle=Land-use+change+and+greenhouse+gas+emissions+from+corn+and+cellulosic+ethanol&rft.au=Dunn%2C+Jennifer+B%3BMueller%2C+Steffen%3BKwon%2C+Ho-young%3BWang%2C+Michael+Q&rft.aulast=Dunn&rft.aufirst=Jennifer&rft.date=2013-01-01&rft.volume=6&rft.issue=1&rft.spage=51&rft.isbn=&rft.btitle=&rft.title=Biotechnology+for+Biofuels&rft.issn=17546834&rft_id=info:doi/10.1186%2F1754-6834-6-51 L2 - http://www.biotechnologyforbiofuels.com/content/6/1/51 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-06-01 N1 - Number of references - 39 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Data processing; Carbon; Forests; Life cycle; Land use; Crops; Biofuels; Models; Greenhouses; Ethanol; Fuel technology; Corn; Emissions; Wood; Greenhouse gases; Biotechnology; Miscanthus; USA; USA, Massachusetts, Woods Hole DO - http://dx.doi.org/10.1186/1754-6834-6-51 ER - TY - JOUR T1 - In situfabrication of porous-carbon-supported alpha -MnO sub(2) nanorods at room temperature: application for rechargeable Li-O sub(2) batteries AN - 1315689998; 17621356 AB - Lithium-O sub(2) cells can be considered the "holy grail" of lithium batteries because they offer much superior theoretical energy density to conventional lithium-ion systems. In this study, porous carbon-supported MnO sub(2) nanorods synthesized at room temperature were explored as an electrocatalyst for rechargeable Li-O sub(2) cells. Both high-energy X-ray diffraction and X-ray absorption fine-structure analyses showed that the prepared MnO sub(2) exhibited a tetragonal crystal structure ( alpha -MnO sub(2)), which has proved to be one of the most efficient catalysts to facilitate the charging of the Li-O sub(2) cell. Under the current synthetic approach, alpha -MnO sub(2) was uniformly distributed onto the surface of a carbon support, without disrupting the porous structure at the surface of the carbon cathode. As a result, the as-prepared catalysts demonstrated good electrochemical behavior, with a capacity of similar to 1400 mA h g super(-1) (carbon + electrocatalyst) under a current density of 100 mA g super(-1) (carbon + electrocatalyst) during the initial discharge. The charge potential was significantly reduced, to 3.5-3.7 V, compared with most of the reported data, which are above 4.0 V. The mechanism of the capacity fade with cycling was also investigated by analyzing the cathode at different states of discharge-charge by X-ray photoelectron spectroscopy. JF - Energy & Environmental Science AU - Qin, Yan AU - Lu, Jun AU - Du, Peng AU - Chen, Zonghai AU - Ren, Yang AU - Wu, Tianpin AU - Miller, Jeffrey T AU - Wen, Jianguo AU - Miller, Dean J AU - Zhang, Zhengcheng AU - Amine, Khalil AD - Chemical Science and Engineering Division; Argonne National Laboratory; 9700 South Cass Avenue; Lemont; IL 60439; USA; +1-630-252-3838; , amine@anl.gov Y1 - 2013/01// PY - 2013 DA - Jan 2013 SP - 519 EP - 531 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 6 IS - 2 SN - 1754-5692, 1754-5692 KW - Environment Abstracts KW - Batteries KW - Temperature KW - Absorption KW - Catalysts KW - Spectroscopy KW - Electrochemistry KW - X-ray diffraction KW - Lithium KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1315689998?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environmental+Science&rft.atitle=In+situfabrication+of+porous-carbon-supported+alpha+-MnO+sub%282%29+nanorods+at+room+temperature%3A+application+for+rechargeable+Li-O+sub%282%29+batteries&rft.au=Qin%2C+Yan%3BLu%2C+Jun%3BDu%2C+Peng%3BChen%2C+Zonghai%3BRen%2C+Yang%3BWu%2C+Tianpin%3BMiller%2C+Jeffrey+T%3BWen%2C+Jianguo%3BMiller%2C+Dean+J%3BZhang%2C+Zhengcheng%3BAmine%2C+Khalil&rft.aulast=Qin&rft.aufirst=Yan&rft.date=2013-01-01&rft.volume=6&rft.issue=2&rft.spage=519&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environmental+Science&rft.issn=17545692&rft_id=info:doi/10.1039%2Fc2ee23621d LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-02-01 N1 - Number of references - 57 N1 - Last updated - 2015-08-05 N1 - SubjectsTermNotLitGenreText - Batteries; Absorption; Temperature; Catalysts; X-ray diffraction; Electrochemistry; Spectroscopy; Lithium DO - http://dx.doi.org/10.1039/c2ee23621d ER - TY - JOUR T1 - Life cycle comparison of hydrothermal liquefaction and lipid extraction pathways to renewable diesel from algae AN - 1291617791; 17667358 AB - Algae biomass is an attractive biofuel feedstock when grown with high productivity on marginal land. Hydrothermal liquefaction (HTL) produces more oil from algae than lipid extraction (LE) does because protein and carbohydrates are converted, in part, to oil. Since nitrogen in the algae biomass is incorporated into the HTL oil, and since lipid extracted algae for generating heat and electricity are not co-produced by HTL, there are questions regarding implications for emissions and energy use. We studied the HTL and LE pathways for renewable diesel (RD) production by modeling all essential operations from nutrient manufacturing through fuel use. Our objective was to identify the key relationships affecting HTL energy consumption and emissions. LE, with identical upstream growth model and consistent hydroprocessing model, served as reference. HTL used 1.8 fold less algae than did LE but required 5.2 times more ammonia when nitrogen incorporated in the HTL oil was treated as lost. HTL RD had life cycle emissions of 31,000 gCO sub(2) equivalent (gCO sub(2)e) compared to 21,500 gCO sub(2)e for LE based RD per million BTU of RD produced. Greenhouse gas (GHG) emissions increased when yields exceeded 0.4 g HTL oil/g algae because insufficient carbon was left for biogas generation. Key variables in the analysis were the HTL oil yield, the hydrogen demand during upgrading, and the nitrogen content of the HTL oil. Future work requires better data for upgrading renewable oils to RD and requires consideration of nitrogen recycling during upgrading. JF - Mitigation and Adaptation Strategies for Global Change AU - Frank, Edward D AU - Elgowainy, Amgad AU - Han, Jeongwoo AU - Wang, Zhichao AD - Center for Transportation Research, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA, efrank@anl.gov Y1 - 2013/01// PY - 2013 DA - January 2013 SP - 137 EP - 158 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 18 IS - 1 SN - 1381-2386, 1381-2386 KW - Aqualine Abstracts; Microbiology Abstracts C: Algology, Mycology & Protozoology; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Environment Abstracts; Sustainability Science Abstracts KW - Fuels KW - Liquefaction KW - Nutrients KW - Hydrogen KW - Oil KW - Emissions KW - Algae KW - Ammonia KW - biogas KW - Greenhouse effect KW - Biomass KW - Model Studies KW - Greenhouses KW - Heat KW - Calorimetry KW - Greenhouse gases KW - Biofuels KW - Nitrogen KW - Lipids KW - Life cycle KW - Electricity KW - Recycling KW - Models KW - Yield KW - Carbon KW - Carbohydrates KW - Growth rate KW - Data processing KW - Adaptations KW - Energy consumption KW - Diesel KW - Hydrothermal fields KW - ENA 03:Energy KW - SW 5010:Network design KW - Q5 08503:Characteristics, behavior and fate KW - M3 1010:Issues in Sustainable Development KW - AQ 00008:Effects of Pollution KW - K 03320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1291617791?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mitigation+and+Adaptation+Strategies+for+Global+Change&rft.atitle=Life+cycle+comparison+of+hydrothermal+liquefaction+and+lipid+extraction+pathways+to+renewable+diesel+from+algae&rft.au=Frank%2C+Edward+D%3BElgowainy%2C+Amgad%3BHan%2C+Jeongwoo%3BWang%2C+Zhichao&rft.aulast=Frank&rft.aufirst=Edward&rft.date=2013-01-01&rft.volume=18&rft.issue=1&rft.spage=137&rft.isbn=&rft.btitle=&rft.title=Mitigation+and+Adaptation+Strategies+for+Global+Change&rft.issn=13812386&rft_id=info:doi/10.1007%2Fs11027-012-9395-1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Number of references - 43 N1 - Last updated - 2016-10-12 N1 - SubjectsTermNotLitGenreText - Growth rate; Lipids; Liquefaction; Calorimetry; Life cycle; Greenhouse effect; Electricity; Carbohydrates; Hydrothermal fields; Adaptations; Data processing; Ammonia; Fuels; biogas; Nutrients; Hydrogen; Biomass; Recycling; Greenhouses; Models; Carbon; Heat; Diesel; Biofuels; Algae; Nitrogen; Oil; Emissions; Energy consumption; Greenhouse gases; Yield; Model Studies DO - http://dx.doi.org/10.1007/s11027-012-9395-1 ER - TY - CPAPER T1 - A probabilistic approach to examine the impacts of mitigation policies on future global PM emissions from on-road vehicles T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313122670; 6184844 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Yan, Fang AU - Winijkul, Ekbordin AU - Bond, Tami AU - Streets, David Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Mitigation KW - Emissions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313122670?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=A+probabilistic+approach+to+examine+the+impacts+of+mitigation+policies+on+future+global+PM+emissions+from+on-road+vehicles&rft.au=Yan%2C+Fang%3BWinijkul%2C+Ekbordin%3BBond%2C+Tami%3BStreets%2C+David&rft.aulast=Yan&rft.aufirst=Fang&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Parallel scripting for improved performance and productivity in climate model postprocessing, integration, and analysis T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313116307; 6189306 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Wilde, Michael AU - Mickelson, Sheri AU - Jacob, Robert AU - Zamboni, Laura AU - Elliott, Joshua AU - Yan, Eugene Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Climatic changes KW - Integration KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313116307?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Parallel+scripting+for+improved+performance+and+productivity+in+climate+model+postprocessing%2C+integration%2C+and+analysis&rft.au=Wilde%2C+Michael%3BMickelson%2C+Sheri%3BJacob%2C+Robert%3BZamboni%2C+Laura%3BElliott%2C+Joshua%3BYan%2C+Eugene&rft.aulast=Wilde&rft.aufirst=Michael&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Making Sense of the Data Deluge: New Tools and New Methods T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313116196; 6189303 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Foster, Ian Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313116196?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Making+Sense+of+the+Data+Deluge%3A+New+Tools+and+New+Methods&rft.au=Foster%2C+Ian&rft.aulast=Foster&rft.aufirst=Ian&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Soil Carbon and Nitrogen Dynamics in Deciduous Forest Exposed to Twelve Years of Atmospheric CO2 Enrichment T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313105300; 6188402 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Jastrow, Julie AU - O'Brien, Sarah AU - Moran, Kelly AU - Boutton, Thomas Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Soil KW - Deciduous forests KW - Nitrogen KW - Carbon dioxide KW - Carbon UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313105300?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Soil+Carbon+and+Nitrogen+Dynamics+in+Deciduous+Forest+Exposed+to+Twelve+Years+of+Atmospheric+CO2+Enrichment&rft.au=Jastrow%2C+Julie%3BO%27Brien%2C+Sarah%3BMoran%2C+Kelly%3BBoutton%2C+Thomas&rft.aulast=Jastrow&rft.aufirst=Julie&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Summary and Results from the Ganges Valley Aerosol Experiment (GVAX) T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313097622; 6178671 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Kotamarthi, Veerabhadra Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Aerosols KW - Valleys UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313097622?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Summary+and+Results+from+the+Ganges+Valley+Aerosol+Experiment+%28GVAX%29&rft.au=Kotamarthi%2C+Veerabhadra&rft.aulast=Kotamarthi&rft.aufirst=Veerabhadra&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Networked Observation of Precipitating Cloud Systems in Oklahoma T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313093044; 6194500 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Collis, Scott AU - Giangrande, Scott AU - Bharadwaj, Nitin Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - USA, Oklahoma KW - Clouds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313093044?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Networked+Observation+of+Precipitating+Cloud+Systems+in+Oklahoma&rft.au=Collis%2C+Scott%3BGiangrande%2C+Scott%3BBharadwaj%2C+Nitin&rft.aulast=Collis&rft.aufirst=Scott&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Optimizing Hydropower Day-Ahead Scheduling for the Oroville-Thermalito Project T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313092448; 6183023 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Veselka, Thomas AU - Mahalik, Matthew Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Hydroelectric power UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313092448?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Optimizing+Hydropower+Day-Ahead+Scheduling+for+the+Oroville-Thermalito+Project&rft.au=Veselka%2C+Thomas%3BMahalik%2C+Matthew&rft.aulast=Veselka&rft.aufirst=Thomas&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Observation-constrained Estimation of Aerosol Climate Impacts over S Asia T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313072704; 6194682 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Feng, Yan AU - Kotamarthi, Veerabhadra AU - Jefferson, Anne AU - Wilcox, Eric AU - Bender, Frida AU - Pistone, Kristina AU - Praveen, Puppala AU - Thomas, Rick AU - Ramanathan, Veerabhadran Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Asia KW - Aerosols KW - Climate UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313072704?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Observation-constrained+Estimation+of+Aerosol+Climate+Impacts+over+S+Asia&rft.au=Feng%2C+Yan%3BKotamarthi%2C+Veerabhadra%3BJefferson%2C+Anne%3BWilcox%2C+Eric%3BBender%2C+Frida%3BPistone%2C+Kristina%3BPraveen%2C+Puppala%3BThomas%2C+Rick%3BRamanathan%2C+Veerabhadran&rft.aulast=Feng&rft.aufirst=Yan&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Predicting global microbial community structure and function from global climate- ecosystem models T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313068050; 6184134 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Gilbert, Jack AU - Larsen, Peter AU - Mickelson, Sheri AU - Drewniak, Beth AU - Jacob, Robert Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Climate KW - Microbial activity KW - Community composition KW - Ecosystem models KW - Community structure UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313068050?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Predicting+global+microbial+community+structure+and+function+from+global+climate-+ecosystem+models&rft.au=Gilbert%2C+Jack%3BLarsen%2C+Peter%3BMickelson%2C+Sheri%3BDrewniak%2C+Beth%3BJacob%2C+Robert&rft.aulast=Gilbert&rft.aufirst=Jack&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Increase in NOx emissions from thermal power plants in India: bottom-up inventories and satellite observations T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313057194; 6189046 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Lu, Zifeng AU - Streets, David Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - India KW - Remote sensing KW - Satellites KW - Power plants KW - Emissions KW - Nitrogen compounds KW - Oxides KW - Thermal power KW - Inventories UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313057194?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Increase+in+NOx+emissions+from+thermal+power+plants+in+India%3A+bottom-up+inventories+and+satellite+observations&rft.au=Lu%2C+Zifeng%3BStreets%2C+David&rft.aulast=Lu&rft.aufirst=Zifeng&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Assessment of spatial heterogeneity, environmental controls, and prediction accuracy of soil organic carbon stocks across geospatial and earth system models T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313037269; 6189075 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Mishra, Umakant AU - Riley, William AU - Koven, Charles Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Prediction KW - Organic carbon KW - Soil KW - Spatial Heterogeneity KW - Spatial heterogeneity KW - Soils (organic) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313037269?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Assessment+of+spatial+heterogeneity%2C+environmental+controls%2C+and+prediction+accuracy+of+soil+organic+carbon+stocks+across+geospatial+and+earth+system+models&rft.au=Mishra%2C+Umakant%3BRiley%2C+William%3BKoven%2C+Charles&rft.aulast=Mishra&rft.aufirst=Umakant&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Synchrotron micro-XRF mapping of Ag storage in a coastal marine diatom; implications for Ag as a novel paleoproductivity proxy AN - 1648909013; 2015-010493 AB - Silver (Ag) has potential for use as a paleoproductivity proxy in environments where a high flux of organic matter creates reducing conditions in sediments. Its proposed sequestration under reducing conditions as the species Ag2S confers an advantage over the more conventional productivity proxy barite, which becomes unreliable when sulfate reduction occurs in sediments. Other conventional productivity proxies (organic carbon and biogenic silica) are subject to rapid remineralization during early diagenesis, whereas Ag is likely to be preserved. Prior studies have hinted that Ag may be delivered to sediments via diatom debris. However, whether Ag is primarily associated with the frustule silica matrix or with diatom organic matter has not been established, and hence the mechanism of Ag delivery to sediments remains ambiguous. In this study we investigated the location of Ag storage in diatoms using synchrotron micro-XRF to map Ag, along with Ca, P, S, Si, and Fe, in single cells of the coastal marine diatom Thalassiosira pseudonana. Diatoms were cultured in the laboratory with Ag added to the growth medium at 50 and 100 ppb. Samples were analyzed at the sub-micron scale at the Advanced Photon Source, Argonne National Laboratory. Detectable Ag concentrations appear to be localized to intracellular "hotspots" that are not associated with frustule Si, either as part of the matrix or surface-adsorbed. Silver "hotspots" are co-localized with Fe, suggesting that Ag is stored within vacuoles, as recently shown for Fe in centric diatoms. Overall, our results support the hypothesis that Ag is delivered to sediments with diatom organic matter and suggest a common strategy by centric diatoms for intracellular sequestration of micronutrient (Fe) and nonessential (Ag) trace metals. JF - American Geophysical Union Fall Meeting AU - King, M W AU - Hendy, I L AU - Lai, B AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract OS31B EP - 1715 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648909013?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Synchrotron+micro-XRF+mapping+of+Ag+storage+in+a+coastal+marine+diatom%3B+implications+for+Ag+as+a+novel+paleoproductivity+proxy&rft.au=King%2C+M+W%3BHendy%2C+I+L%3BLai%2C+B%3BAnonymous&rft.aulast=King&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Direct observation of phase transitions; in situ diffraction measurements at the crystal scale AN - 1637542940; 2014-104206 AB - Phase transitions often display determinate crystallographic orientation relationships between parent and symmetrically degenerate daughter domains. Preferred variant selection and orientation memory under the influence of deviatoric stress are the 'fingerprints' of the transformation mechanism, driving force, and microstructure. For the alpha -epsilon transition in iron - significant to the structure and anisotropy of the Earth's inner core - these have been studied primarily by texture analysis of polycrystalline powders; the convoluted nature of these data, however, render it essentially impossible to examine variant selection, and even precise orientation relationships themselves. Recently developed X-ray diffraction techniques have made it possible to answer these questions. Results from two measurements are presented. First, heterogeneous variant selection was observed and the specific alpha /epsilon orientation relationship was determined under quasi-static loading using High Energy Diffraction Microscopy at beamline 1-ID of APS-ANL. Second, the spatial heterogeneity and mutual exclusivity among epsilon variants was observed at the incipient transition using the Laue mu -diffraction technique at beamline 12.3.2. of ALS-LBNL. In both cases, a 60X25mu m single crystal of iron was pressurized in a DAC and measured before and after the alpha -epsilon transition at 13GPa. In the HEDM experiment, spatial resolution is sacrificed for domain-averaged orientation and strain resoltuion, making it possible to quantify the magnitude of the applied deviatoric stress in situ. In the Laue mu -Diffraction technique, the local lattice orientations are mapped with 1mu m resolution, displaying marked spatial variation. These pilot experiments open new possibilities for investigating high pressure/high temperature transformations in situ. By mapping both orientations and lattice strains, the nature of the mechanisms and driving forces can be illuminated. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. Funding through the Laboratory Directed Research and Development program (10- ERD-053) is gratefully acknowledged. JF - American Geophysical Union Fall Meeting AU - Bernier, J V AU - Barton, N R AU - Farber, D AU - Wenk, H AU - Kunz, M AU - Lienert, U AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR23A EP - 2388 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542940?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Direct+observation+of+phase+transitions%3B+in+situ+diffraction+measurements+at+the+crystal+scale&rft.au=Bernier%2C+J+V%3BBarton%2C+N+R%3BFarber%2C+D%3BWenk%2C+H%3BKunz%2C+M%3BLienert%2C+U%3BAnonymous&rft.aulast=Bernier&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Structural characterization of new minerals from early solar condensates and shocked meteorites AN - 1637542346; 2014-104204 AB - Early solar condensates bear essential information on the early state of the solar system. Over the past few years a variety of new highly refractory minerals which are early condensates have been discovered in meteorites. These phases pose extreme difficulties for rigorous structure analysis because they occur usually in few individual crystals of 1 - 3 micron diameter. The same problems hold for high pressure phases occurring in melt veins in S5-6 level shocked meteorites. We have examined the structure of early condensates and minerals in shock melt veins using synchrotron based micro-Laue-, micro-monochormatic diffraction and EBSD. JF - American Geophysical Union Fall Meeting AU - Tschauner, O D AU - Ma, C AU - Liu, W AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR23A EP - 2386 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542346?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Structural+characterization+of+new+minerals+from+early+solar+condensates+and+shocked+meteorites&rft.au=Tschauner%2C+O+D%3BMa%2C+C%3BLiu%2C+W%3BAnonymous&rft.aulast=Tschauner&rft.aufirst=O&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - In-situ single-crystal structural determination of individual grains of high pressure phases in (Mg,Fe)SiO3 at deep lower mantle conditions AN - 1637542128; 2014-104210 AB - (Mg,Fe)SiO3 silicate is believed to be the major component in Earth's lower mantle. Precise measurements of crystallographic information of (Mg,Fe)SiO3 at the pressure (P) and temperature (T) conditions within Earth's lower mantle are therefore critical for interpreting seismic observations. X-ray single-crystal structural analysis provides the most unambiguous information for characterizing phases of interest. However, the structures of perovskite (Pv) above approximately 90 GPa and the post-perovskite (PPv) phases cannot be recovered back to ambient conditions. Consequently, studies of the high pressure phases in (Mg,Fe)SiO3 are restricted to polycrystalline samples within a diamond anvil cell (DAC) device. Our goal is to in-situ indentify crystal orientations of individual grains and then apply conventional single-crystal structural analysis to the individual grains. The first and most important step is to grow relatively large grains.. The crystal sizes of individual grains were determined to be within 500 nm X 500 nm by a two-dimension scan using the 300 X 500 nm2 X-ray beam at 34 ID-E of APS. The second step is to collect the single crystal diffraction data while the sample sits at the orientation center of the omega (omega ) rotation stage. Once the orientation matrix is determined, the diffraction spots can be assigned to the grain of origin and peak intensities can be evaluated for the structural refinement. A total of 130 grains belonging to the Pv phase were indexed with up to 48 reflections for each grain and all of them can be assigned to the known Pbnm space group. Similarly, up to 54 reflections for each grain of the PPv phase can be assigned to the Cmcm space group. Up to four equivalent reflections were indentified for both of the orthorhombic symmetries. Figure 1 shows four symmetric equivalent reflections for the {121} of the Pv phase and three reflections for the {223} of the PPv phase. To our knowledge, this is the first report on in-situ single-crystal structural analysis for both the Pv and PPv phases in (Mg,Fe)SiO3 at deep lower mantle P-T conditions. JF - American Geophysical Union Fall Meeting AU - Zhang, L AU - Meng, Y AU - Yang, W AU - Wang, L AU - Mao, W L AU - Zeng, Q AU - Liu, W AU - Xu, R AU - Mao, H AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR23A EP - 2392 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542128?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=In-situ+single-crystal+structural+determination+of+individual+grains+of+high+pressure+phases+in+%28Mg%2CFe%29SiO3+at+deep+lower+mantle+conditions&rft.au=Zhang%2C+L%3BMeng%2C+Y%3BYang%2C+W%3BWang%2C+L%3BMao%2C+W+L%3BZeng%2C+Q%3BLiu%2C+W%3BXu%2C+R%3BMao%2C+H%3BAnonymous&rft.aulast=Zhang&rft.aufirst=L&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - A random subgrouping scheme for ensemble based filters AN - 1637527706; 2014-100845 AB - Ensemble based filters can be divided into two categories: stochastic and deterministic. Both types of filters suffer from the problem of generating extreme outliers in the ensembles produced in a nonlinear system. This is especially true for the deterministic filter with a large ensemble size. The outliers can persist for a long time, generate substantial separation from the other ensemble members, and contribute to large errors in the ensemble mean analysis. To address the problem of extreme outliers, a new technique is developed that randomly divides the full ensemble into sub-ensembles of equal size for each observation at each analysis step. All sub-ensembles are updated independently using deterministic filter algebra. The random subgrouping technique removes the effects of extreme outliers in two ways: the smaller ensemble size for each sub-ensemble limits the deviation of an outlier from the ensemble mean and the random subgrouping prevents the long-term persistence of an outlier. Test results, using the random subgrouping technique on two low-order models (Lorenz-63 and Lorenz-96) and a global QG atmospheric model coupled to a slab ocean, show that the new scheme significantly improves performance compared to regular stochastic and deterministic filters. JF - American Geophysical Union Fall Meeting AU - Liu, Y AU - Rong, X AU - Liu, Z AU - Wu, S AU - Zhang, S AU - Jacob, R L AU - Lu, F AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract ED21A EP - 0692 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 15:Miscellaneous UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637527706?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+random+subgrouping+scheme+for+ensemble+based+filters&rft.au=Liu%2C+Y%3BRong%2C+X%3BLiu%2C+Z%3BWu%2C+S%3BZhang%2C+S%3BJacob%2C+R+L%3BLu%2C+F%3BAnonymous&rft.aulast=Liu&rft.aufirst=Y&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterization of secondary mineral grain coatings and their role as diffusion-controlled sinks and sources for metal contaminants AN - 1637527635; 2014-101088 AB - Many important geochemical reactions occur at the mineral-water interface, including sorption and desorption reactions of contaminants. Fundamental knowledge of the kinetics of these processes is based primarily on experimental observations of reactions at faces of single crystals or macroscopic data from pure mineral powder suspensions. Sorption reactions at crystal faces are generally very fast, on the order of microseconds or less, with reaction times often limited only by film diffusion at the mineral-water interface. In well-stirred suspensions of aquifer sediments, however, sorptive equilibrium can take many hours or days to achieve steady-state concentrations. We have examined the potential reasons for sorption rate limitation using uranium(VI) sorption by sediments from a sandy aquifer in Savannah River, South Carolina (USA). U(VI) sorption by sand-sized grains from the aquifer is dominated by reaction with secondary mineral coatings on quartz and feldspar grains. The coatings studied were on the order of 15 microns in thickness (i.e., from quartz grain to aqueous solution) and composed primarily of clay minerals and hematite of varying particle size. Microfocused-XRF imaging of elemental concentrations (e.g., U, Fe) of polished cross-sections of the grain/coating contact showed strong spatial correlations of U and Fe within the coatings, regardless of the length of reaction time (30 minutes to 4 weeks). The spatial resolution of the mu -XRF technique is of the order of 2 microns in horizontal directions, but the uncertainty of the observed spatial gradients is high due to grain curvature away from the polished surface and fluorescence contributed from the entire 30 micron thickness of a typical grain/epoxy thin section. TEM characterization of focused-ion-beam (FIB), vertically-extracted samples of the grain-coating contact shows that complex pore networks exist within the coatings of variable dimensions and unknown connectivity. Using scanning TEM (STEM) tomography, it can be seen that there are large numbers of pore throat sizes less than 10 nm within the coatings. We hypothesize that diffusion through these pores, which likely have electrically charged surfaces, controls the observed macroscopic rates of U(VI) sorption in batch experiments with sand grains. Evidence to support this hypothesis was observed by studying U and Fe fluorescence spatial variation within FIB samples (1 micron thick) at 200 nm spatial resolution. With this greater spatial resolution, it is possible to see U concentration variations within the coatings that are dependent on the time of sorption reaction, and illustrates how the coating environment constitutes a diffusion constraint to achieve adsorptive equilibrium between an aqueous phase and the mineral surfaces. Including this diffusion constraint within conceptual models for reactive contaminant transport may be significant at the field scale, because secondary mineral coatings are potentially both sinks and sources of contaminants depending on the history of a contaminated site. This is important in resolving long-term transport predictions at DOE sites, such as Hanford and Savannah River, where equilibrium versus kinetic reactive transport models are being evaluated. JF - American Geophysical Union Fall Meeting AU - Davis, J A AU - Guo, H AU - Lai, B AU - Kemner, K M AU - Ercius, P AU - Fox, P M AU - Singer, D M AU - Minor, A AU - Waychunas, G AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H34C EP - 04 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637527635?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterization+of+secondary+mineral+grain+coatings+and+their+role+as+diffusion-controlled+sinks+and+sources+for+metal+contaminants&rft.au=Davis%2C+J+A%3BGuo%2C+H%3BLai%2C+B%3BKemner%2C+K+M%3BErcius%2C+P%3BFox%2C+P+M%3BSinger%2C+D+M%3BMinor%2C+A%3BWaychunas%2C+G%3BAnonymous&rft.aulast=Davis&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Monitoring climate and man-made induced variations in terrestrial water storage (TWS) across Africa using GRACE data AN - 1637526628; 2014-100924 AB - It is common practice for researchers engaged in research related to climate change to examine the temporal variations in relevant climatic parameters (e.g., temperature, precipitation) and to extract and examine drought indices reproduced from one or more such parameters. Drought indices (meteorological, agricultural and hydrological) define departures from normal conditions and are used as proxies for monitoring water availability. Many of these indices exclude significant controlling factor(s), do not work well in specific settings and regions, and often require long (> or =50 yr) calibration time periods and substantial meteorological data, limiting their application in areas lacking adequate observational networks. Additional uncertainties are introduced by the models used in computing model-dependent indices. Aside from these uncertainties, none of these indices measure the variability in terrestrial water storage (TWS), a term that refers to the total vertically integrated water content in an area regardless of the reservoir in which it resides. Inter-annual trends in TWS were extracted from monthly Gravity Recovery and Climate Experiment (GRACE) data acquired (04/2002 to 08/2011) over Africa and correlated (in a GIS environment) with relevant temporal remote sensing, geologic, hydrologic, climatic, and topographic datasets. Findings include the following: (1) large sectors of Africa are undergoing statistically significant variations (+36 mm/yr to -16 mm/yr) due to natural and man-made causes; (2) warming of the tropical Atlantic ocean apparently intensified Atlantic monsoons and increased precipitation and TWS over western and central Africa's coastal plains, proximal mountainous source areas, and inland areas as far as central Chad; (3) warming in the central Indian Ocean decreased precipitation and TWS over eastern and southern Africa; (4) the high frequency of negative phases of the North Atlantic Oscillation (NAO) increased precipitation and TWS over northwest Africa; (5) deforestation in the Congo Basin and southern Tanzania decreased TWS and (6) the construction of dams (e.g., Merowe High Dam, Tekeze, Amerti-Neshi, Beles, Gilgel Gibe I, Gilgel Gibe II, and Karadobi) throughout the GRACE period increased TWS in upstream Nile Valley countries. Given the 10-year monthly GRACE record of water availability data (represented by GRACE TWS) acquired on the sub-basin scale across the globe, and the plans underway for deployment of a GRACE follow-up (2016-2026), consideration should be given to using GRACE TWS data as an alternative, viable drought index, and for monitoring the impacts of human interventions on hydrologic systems. JF - American Geophysical Union Fall Meeting AU - Ahmed, Mohamed E AU - Sultan, Mohamed AU - Wahr, J M AU - Yan, E AU - Bonin, J A AU - Chouinard, Kyle AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract G33A EP - 0942 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637526628?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Monitoring+climate+and+man-made+induced+variations+in+terrestrial+water+storage+%28TWS%29+across+Africa+using+GRACE+data&rft.au=Ahmed%2C+Mohamed+E%3BSultan%2C+Mohamed%3BWahr%2C+J+M%3BYan%2C+E%3BBonin%2C+J+A%3BChouinard%2C+Kyle%3BAnonymous&rft.aulast=Ahmed&rft.aufirst=Mohamed&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Krypton-81, helium-4 and carbon-14 based estimation of groundwater ages in the Guarani Aquifer System; implications for the He-4 geochronometer AN - 1629943388; 2014-093346 AB - Characterization of aquifer systems remains a challenge, particularly for large aquifers with limited hydrogeological information. Groundwater age is an important parameter that integrates aquifer recharge and flow dynamics and provides the ability to reliably constrain groundwater models. We have used multiple isotope tracers (C-14, He-4, and Kr-81) to estimate the age of groundwater along a 400-km transect in the north-eastern part of the Guarani Aquifer System (GAS) in Brazil. Carbon-14 measurements were made with an AMS, He-4 by mass-spectrometry, and Kr-81 by atom trap trace analysis (ATTA). Groundwater samples were collected along a groundwater flow path that runs from the outcrop area in the east to the deep confined section in the west, where the aquifer is up to about 1000 m deep. Present groundwater recharge occurs in the outcrop areas, as indicated by the presence of tritium and modern 14C. Carbon-14 activities reach values below detection limit at relatively short distances (a few km) from the outcrop. Abundance of 81Kr (half-life 229 Ka), in samples free of C-14, decreases from 0.81+ or -0.11 (expressed as (81Kr/Kr)sample/(81Kr/Kr)air) in the east to 0.18+ or -0.03 in the western-most sample (estimated age=566+ or -60 ka). Measured 4He-excess is far above that expected from in-situ production rates in sandstone aquifers and overestimates the age by several orders of magnitude. We used 81Kr ages to calibrate the 4He geochronometer which indicates a basal flux of about 2.8X10-11 cm3 STP He/cm2/a. This flux is lower than most estimates of basal flux in previous studies and will allow a wider use of 4He for groundwater dating and aquifer characterization. JF - American Geophysical Union Fall Meeting AU - Aggarwal, P K AU - Chang, H K AU - Gastmans, D AU - Sturchio, N C AU - Araguas, L AU - Matsumoto, T AU - Lu, Z AU - Jiang, W AU - Yokochi, R AU - Mueller, P AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H12A EP - 05 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629943388?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Krypton-81%2C+helium-4+and+carbon-14+based+estimation+of+groundwater+ages+in+the+Guarani+Aquifer+System%3B+implications+for+the+He-4+geochronometer&rft.au=Aggarwal%2C+P+K%3BChang%2C+H+K%3BGastmans%2C+D%3BSturchio%2C+N+C%3BAraguas%2C+L%3BMatsumoto%2C+T%3BLu%2C+Z%3BJiang%2C+W%3BYokochi%2C+R%3BMueller%2C+P%3BAnonymous&rft.aulast=Aggarwal&rft.aufirst=P&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H12A/abstracts/H12A-05.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Thicknesses of nanoscale brine films on mineral surfaces under geologic CO (sub 2) sequestration conditions measured with synchrotron X-ray fluorescence AN - 1629941235; 2014-098265 AB - Brine films remaining on mineral surfaces can influence flow, diffusion, and reactions between rock, brine, and CO2 phases in reservoirs used for geologic CO2 sequestration. We have investigated how the surface roughness and capillary potential Pc influences the thickness of a KCsI2 brine film on different minerals (silica and mica) under confinement with supercritical (sc) CO2. The thicknesses of brine films coating interior surfaces of mineral windows in a high-pressure cell were determined through synchrotron X-ray fluorescence of iodide ion at 7.8 MPa and 40 degrees C (representative of conditions at about 0.75 km below the land surface), with scCO2 as the immiscible confining fluid. The area-averaged film thicknesses on both silica and mica windows measured within a narrow Pc range from 0.18 to 3.7 kPa were found to be strongly controlled by surface roughness. The film thickness dependence on Pc was moderate (decreased 25% to 50%) on mica surfaces, and minor (decreased about 6% to 25%) on silica. We observed thicker brine films on mica, than on silica. The area-averaged film thicknesses on the 330 nm root mean square roughness (Rrms) silica surface ranged from 265 nm to 249 nm over the applied Pc range. The film thicknesses on the 146 nm Rrms mica surface ranged from 505 nm to 402 nm over the same range of Pc. The film thickness-Pc relation was obtained for the drainage and rewetting process on both minerals. Film thicknesses on the smoother mica surfaces were similar to DLVO-predicted values, while measurements on the smooth silica were only about 25% of the predicted thicknesses. The thickness-Pc relation of silica was nonhysteretic. But measurements on mica showed clear hysteresis, apparently indicative of changes in wettability during the drainage and rewetting process. Further experimental and computational studies on brine films wetting mineral surfaces over wider ranges of capillary pressures are needed in order to better understand film behavior under geologic CO2 sequestration conditions. JF - American Geophysical Union Fall Meeting AU - Kim, T AU - Tokunaga, T K AU - Shuman, D B AU - Sutton, S R AU - Newville, M AU - Lanzirotti, A AU - Bargar, J AU - Latimer, M AU - Webb, Sam AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23D EP - 1385 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629941235?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Thicknesses+of+nanoscale+brine+films+on+mineral+surfaces+under+geologic+CO+%28sub+2%29+sequestration+conditions+measured+with+synchrotron+X-ray+fluorescence&rft.au=Kim%2C+T%3BTokunaga%2C+T+K%3BShuman%2C+D+B%3BSutton%2C+S+R%3BNewville%2C+M%3BLanzirotti%2C+A%3BBargar%2C+J%3BLatimer%2C+M%3BWebb%2C+Sam%3BAnonymous&rft.aulast=Kim&rft.aufirst=T&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H23D/abstracts/H23D-1385.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Floodplain hyporheic response under dam release hydrographs AN - 1629940750; 2014-093264 AB - Hydropower operations cause altered hydrograph patterns downstream of dams, which regulates the direction and magnitude of floodplain and riverbed hyporheic flux. Periodic adjustments in river stage changes temporal and spatial patterns in hydraulic pressure, initiates propagation of lateral and vertical hyporheic flux, and affects the riparian ecological system by changing the hyporheic penetration distance, hyporheic flux rate, and thermal conditions in river banks. While this issue has been largely neglected by watershed scientists and managers, there is the potential to use hyporheic metrics in setting dam release rules and restoring downstream river reaches. In order to evaluate the hyporheic feedbacks of various dam release patterns, this study applied a computational fluid dynamics (CFD) model to simulate the interaction of open water hydrographs on porous media lateral hyporheic exchange for the Green River, Utah, downstream of Flaming Gorge Dam. The CFD initially represented the river as a straight channel with a thick porous media extending from the channel banks and bottom. The dam release hydrographs changed the patterns of hyporheic flux at the river banks, the penetration distance of the hyporheic flux, the subsurface thermal patterns, and the residence time of water in the subsurface. The results suggest the undulating river stage downstream of dam releases can initiate patterns of hyporheic exchange similar to those induced by restoration of river bed morphology. JF - American Geophysical Union Fall Meeting AU - Zhou, T AU - Ward, Adam S AU - O'Connor, B L AU - Endreny, T A AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H11D EP - 1217 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940750?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Floodplain+hyporheic+response+under+dam+release+hydrographs&rft.au=Zhou%2C+T%3BWard%2C+Adam+S%3BO%27Connor%2C+B+L%3BEndreny%2C+T+A%3BAnonymous&rft.aulast=Zhou&rft.aufirst=T&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H11D/abstracts/H11D-1217.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Adaptive coarse space construction and nonlinear smoothers for heterogenous Stokes problems AN - 1629940558; 2014-092812 AB - Heterogeneous Stokes problems appear in various forms throughout geodynamics, often coupled to viscoelasticity, viscoplasticity, and porous media flow. As a bottleneck of many high-resolution studies, robust and efficient Stokes solvers are needed. These methods are necessarily multilevel and require accurate coarse representations of operators. The problems arising in lithosphere dynamics are challenging for standard methods due to multiscale structures creating long-range interaction through thin structures that are difficult to accurately represent using in coarse spaces. We incorporate aspects of multigrid, domain decomposition, and multiscale finite element methods to adaptively construct coarse spaces that allow rapid coarsening in smooth regions without sacrificing accuracy in heterogeneous regions. These methods have the additional benefit of working with highly parallel smoothers that can also be used for nonlinear problems. JF - American Geophysical Union Fall Meeting AU - Brown, Jed AU - Knepley, Matthew AU - Smith, Barry AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract DI13C EP - 2434 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940558?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Adaptive+coarse+space+construction+and+nonlinear+smoothers+for+heterogenous+Stokes+problems&rft.au=Brown%2C+Jed%3BKnepley%2C+Matthew%3BSmith%2C+Barry%3BAnonymous&rft.aulast=Brown&rft.aufirst=Jed&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Redox control on iron isotopic fractionation in magmas AN - 1629940544; 2014-092806 AB - The causes of iron isotope variations in terrestrial igneous rocks are uncertain but the redox state of iron may play a role (Dauphas et al. 2009). To develop a quantitative understanding of iron isotopic fractionation at high temperature, it is critical to establish equilibrium isotopic fractionation factors between Fe (super 2+) and Fe (super 3+) in minerals and melts. The reduced partition function ratio (beta -factor) controlling equilibrium isotopic fractionation can be derived from Nuclear Resonant Inelastic X-ray Scattering (NRIXS) measurements at a synchrotron facility. For the (super 56) Fe/ (super 54) Fe ratio at high temperature, we simply have 1,000 Xln beta =2,904/T (super 2) with the average force constant of the bonds holding iron in position (in N/m), which is calculated by taking the 3rd moment of the NRIXS scattering probability function (Dauphas et al. 2012). We have measured the force constants of olivine and silicate glasses of basalt, andesite, dacite, and rhyolite compositions synthesized under controlled redox conditions. XANES and conventional Moessbauer measurements were also performed on the same glasses to characterize the Fe (super 3+) /Fe (sub tot) ratio and coordination environment of iron. In basalt, andesite, and dacite, we find that increases with the Fe (super 3+) /Fe (sub tot) ratio. Extrapolation to pure Fe (super 2+) and Fe (super 3+) gives equilibrium isotopic fractionation between these two redox states of nearly equal +0.2 to +0.3 ppm at magmatic temperatures ( nearly equal 1,300 degrees C). For comparison, the precision of stable iron isotope analyses by MC-ICPMS is nearly equal + or -0.03 ppm, so redox state can influence the iron isotopic composition of magmatic rocks. However, this fractionation is insufficient to explain the heavy iron isotopic composition of MORBs and we are currently investigating whether pressure or other parameters can influence iron beta -factor in magmas. We have also found that the force constant of Fe (super 2+) in rhyolitic melt is high, which explains the heavy Fe isotopic compositions of some granitoids. Dauphas N. et al. 2009. Earth Planet. Sci. Lett. 288, 255-267 Dauphas N. et al. 2012. Geochim. Cosmochim. Acta, in press. (10.1016/j.gca.2012.06.013) JF - American Geophysical Union Fall Meeting AU - Dauphas, N AU - Roskosz, Mathieu AU - Alp, E AU - Sio, C AU - Tissot, F AU - Neuville, D R AU - Hu, M AU - Zhao, J AU - Tissandier, Laurent AU - Medard, E AU - Cordier, Catherine AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract DI13B EP - 2427 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940544?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Redox+control+on+iron+isotopic+fractionation+in+magmas&rft.au=Dauphas%2C+N%3BRoskosz%2C+Mathieu%3BAlp%2C+E%3BSio%2C+C%3BTissot%2C+F%3BNeuville%2C+D+R%3BHu%2C+M%3BZhao%2C+J%3BTissandier%2C+Laurent%3BMedard%2C+E%3BCordier%2C+Catherine%3BAnonymous&rft.aulast=Dauphas&rft.aufirst=N&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hydrogeomorphology of the hyporheic zone; mobile bedforms, dynamic hyporheic flow, and influence on stream ecology AN - 1629940156; 2014-095870 AB - Hyporheic flow in streams has typically been studied separately from geomorphic processes. We are investigating thresholds of bed mobility, dynamic hyporheic storage during floods, and effects on biogeochemical reactions in streams. We investigated hydrogeomorphology in several streams prior to, during, and after a flood. Fine particles were readily deposited onto the bed during baseflow but penetrated more shallowly in hyporheic flow compared with solutes due to the high rate of filtration of fine particles. Due to shallower storage in the bed, fine particles were rapidly entrained during the rising limb of the flood hydrograph. In contrast, solutes were transported deeper and stored longer in hyporheic flow paths during baseflow. Rather than being flushed by the flood, we observed that solutes were stored longer due to expansion of hyporheic flow paths beneath the temporarily enlarged bedforms during the flood. Three important timescales determined the fate of solutes and fine particles: (1) flood duration, (2) relaxation time of flood-enlarged bedforms back to former dimensions, and (3) resulting adjustments and lag times of hyporheic flow. These interactions explain why we observed a peak accumulation of natural particulate organic matter between 2 and 4 cm deep in the bed, i.e., below the scour layer of mobile bedforms but above the maximum depth of particle penetration with hyporheic flow. Thus, physical interactions between bed mobility and hyporheic transport influence how organic matter is stored in the bed and how long it is retained, which affects decomposition rate and metabolism of this southeastern Coastal Plain stream. In a related study of mixed cobble-gravel-sand bed in the Iowa River, IA we measured and modeled hydraulic transport and stream metabolism to determine thresholds of bed shear stress that disrupt stream metabolism. Floods over a four-year period were classified in two disturbance categories based on a critical Shields stress for sand and gravel-bed rivers. Floods not exceeding the critical Shields stress entrained only fine particles from the bed which depressed stream metabolism for 5 days or less due to turbidity effects. Floods exceeding the critical Shields stress depressed stream metabolism for greater than 15 days due to periphyton being dislodged from a fully mobilized bed. Dynamic interactions between hyporheic flow, bed mobility, and flow variation had strong but differential influences on in-stream retention of solutes and fine particulates. These hydrogeomorphic relationships have implications for microbial respiration of organic matter, carbon and nutrient cycling, and fate of contaminants in streams. JF - American Geophysical Union Fall Meeting AU - Harvey, J W AU - Drummond, J D AU - O'Connor, B L AU - Martin, Raleigh L AU - Bhaskar, Aditi S AU - McPhillips, L E AU - Packman, A I AU - Jerolmack, D J AU - Henry, E J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H13I EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940156?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hydrogeomorphology+of+the+hyporheic+zone%3B+mobile+bedforms%2C+dynamic+hyporheic+flow%2C+and+influence+on+stream+ecology&rft.au=Harvey%2C+J+W%3BDrummond%2C+J+D%3BO%27Connor%2C+B+L%3BMartin%2C+Raleigh+L%3BBhaskar%2C+Aditi+S%3BMcPhillips%2C+L+E%3BPackman%2C+A+I%3BJerolmack%2C+D+J%3BHenry%2C+E+J%3BAnonymous&rft.aulast=Harvey&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H13I/abstracts/H13I-03.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Surface hydrophilicity and functional group-driven iron(III) hydroxide nucleation on organic-coated substrates in aqueous environments AN - 1629939807; 2014-095834 AB - Homogeneous and heterogeneous iron hydroxide nanoparticle nucleation can occur continuously in both natural and complex aqueous systems. Iron oxide nanoparticles can act as sinks and/or carriers for heavy metal contaminants; therefore, it is important to develop a better understanding of factors affecting their formation. Organic coatings are ubiquitous in aqueous environments where they can exist on mineral surfaces (e.g., biofilm), as nanoparticle surface coatings (e.g., natural organic matter), or be introduced as coagulants in water treatment systems. These surface coatings could influence the formation of iron oxide nanoparticles and thus, the mobility of aqueous contaminants. Therefore, to better understand the fate and transport of contaminants in complex aqueous environments, we need more accurate information about mechanisms governing heterogeneous and homogeneous nucleation and growth of iron(III) hydroxide nanoparticles in the presence of organic surface coatings. In this work, we used a unique measurement technique allowing for simultaneous small-angle X-ray scattering (SAXS) and grazing incidence (GISAXS) analysis to monitor nanoparticle nucleation in solution and at substrate surfaces. Clean quartz, and polyaspartate- and alginate-coated substrates were chosen as model substrates to represent mineral coatings, engineered organic coatings and natural organic coatings. Polyaspartate was determined to be the most negatively charged substrate and quartz to be the least negatively charged substrate; however, after 2 h of reaction, the total nanoparticle volume calculations--determined from GISAXS--indicate that precipitation of positively-charged iron(III) hydroxide nanoparticles is 10 times higher on the quartz substrate than on the polyaspartate substrate. This implies that electrostatics do not govern iron(III) hydroxide nucleation. Furthermore, homogeneous nucleation approximately 250 mu m above the substrate surface was highest in the presence of the polyaspartate substrate and least in the presence of the quartz substrate. Based on contact angle measurements and surface characterization, we concluded that the degree of hydrophilicity may control heterogeneous nucleation. Differences in substrate surface energy and potential arrangements of functional groups at the substrate surface (-OH and -COOH) may also contribute to the observed trends. These results provide new information for elucidating the effects of polymeric organic substrate coatings on the size, volume, and location of nucleating iron hydroxides, which will help predict nanoparticle interactions in natural and engineered systems. While iron oxide nanoparticles have been extensively studied in aqueous systems, there are still few studies providing in situ hetero- and homogeneous nucleation in the presence of relevant environmental organic substrates, which can aid in modeling the fate and transport of nanoparticles and contaminants in aqueous systems. JF - American Geophysical Union Fall Meeting AU - Ray, Jessica AU - Lee, B AU - Baltrusaitis, Jonas AU - Jun, Y AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H13E EP - 1406 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629939807?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Surface+hydrophilicity+and+functional+group-driven+iron%28III%29+hydroxide+nucleation+on+organic-coated+substrates+in+aqueous+environments&rft.au=Ray%2C+Jessica%3BLee%2C+B%3BBaltrusaitis%2C+Jonas%3BJun%2C+Y%3BAnonymous&rft.aulast=Ray&rft.aufirst=Jessica&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H13E/abstracts/H13E-1406.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - The pressure-volume-temperature equation of state of iron-rich (Mg, Fe)O_ AN - 1618135004; 2014-085933 AB - Seismic observations near the base of the core-mantle boundary (CMB) have detected 5-20 km thick patches in which the seismic wave velocities are reduced by up to 30%. These ultra-low velocity zones (ULVZs) have been interpreted as aggregates of partially molten material (e.g. Williams and Garnero 1996, Hernlund and Jellinek, 2010) or as solid, iron-enriched residues (e.g. Knittle and Jeanloz, 1991; Mao et al., 2006; Wicks et al., 2010), typically based on proposed sources of velocity reduction. The stabilities of these structure types have been explored through dynamic models that have assembled a relationship between ULVZ stability and density (Hernlund and Tackley, 2007; Bower et al., 2010). Now, to constrain the chemistry of ULVZs, more information is needed on the relationship between density and sound velocity of candidate phases. Recently, we have shown that the characteristically low sound speeds of ULVZs can be produced by small amounts of iron-rich (Mg,Fe)O, which is likely to be found in iron-rich assemblages based on current partitioning studies (eg. Sakai et al., 2010; Tange et al., 2009). We determined the Debye velocity (V (sub D) ) of (Mg (sub .16) (super 57) Fe (sub .84) )O using nuclear resonant inelastic x-ray scattering (NRIXS), and calculated the seismically relevant compressional (V (sub P) ) and shear (V (sub S) ) wave velocities up to 120 GPa using an equation of state of a similar composition (Wicks et al., 2010). These densities and sound velocities, in turn, are consistent with reasonable morphologies of modeled solid ULVZs (Bower et al., 2011). To increase the accuracy of density and sound velocity predictions, measurements must be made at elevated temperatures to correctly predict the properties of iron-rich (Mg,Fe)O at mantle conditions. In this study, we present the pressure-volume-temperature equation of state of (Mg (sub .06) (super 57) Fe (sub .94) )O measured up to pressures of 120 GPa and temperatures of 2000 K. Volume was measured with x-ray diffraction at beamline 13-ID-D of the Advanced Photon Source, where high pressures and temperatures are achieved in a diamond anvil cell with in-situ laser heating. The sample was mixed with Fe metal buffer/pressure standard with a neon pressure medium, with salt plates on either side as thermal insulator. We will discuss these density measurements and their impact on sound velocities of iron-rich (Mg,Fe)O in the context of a solid ULVZ. JF - American Geophysical Union Fall Meeting AU - Wicks, J K AU - Jackson, J M AU - Zhuravlev, K K AU - Prakapenka, V AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR43B EP - 2307 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618135004?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+pressure-volume-temperature+equation+of+state+of+iron-rich+%28Mg%2C+Fe%29O_&rft.au=Wicks%2C+J+K%3BJackson%2C+J+M%3BZhuravlev%2C+K+K%3BPrakapenka%2C+V%3BAnonymous&rft.aulast=Wicks&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Aluminous ferro-magnesium silicate perovskite at lower mantle conditions AN - 1618134998; 2014-085932 AB - The only rigorous method for determining the composition of the Earth's lower mantle is to compare seismic estimates for S and P wave velocities and similar experimental estimates for appropriate rock compositions. Magnesium-silicate perovskite is the dominant mineral of the Earth's lower mantle. The composition of perovskite in the mantle is likely dominated by the MgSiO3 component but it also contains small but nearly equal amounts of Al and Fe. It is likely that the Fe content of magnesium-silicate perovskite varies in the lower mantle as a result of the effect of pressure on the partitioning of Fe between magnesium-silicate perovskite and coexisting ferropericlase and possibly due to the presence of chemical heterogeneities that may arise either from subduction of oceanic crust or the presence of primordial material. In order to interpret one dimensional seismic velocity profiles for the lower mantle it is crucial not only to determine velocities for the major minerals such as magnesium-silicate perovskite but also to assess the effect of major chemical substitutions on the elasticity. Using ultrasonic interferometry in the multianvil we measured densities and P and S velocities of monomineralic hot-pressed powdered samples of magnesium silicate perovskite at conditions encompassing the upper region of Earth's lower mantle. We examined these properties for the MgSiO3 end member perovskite plus samples of the same phase containing Fe and Fe and Al. These measurements were performed at the APS synchrotron x-ray source to enable pressure and sample length measurements and were performed up to 25 GPa and 1200 K. The results allow models for seismic wave velocities in the lower mantle to be tested against seismic models and for variations in velocity in the lower mantle to be understood in terms of temperature and composition. JF - American Geophysical Union Fall Meeting AU - Chantel, Julien AU - Frost, Dan J AU - Novella, Davide AU - Manthilake, Geeth M AU - Jing, Z AU - Wang, Y AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR43B EP - 2306 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618134998?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Aluminous+ferro-magnesium+silicate+perovskite+at+lower+mantle+conditions&rft.au=Chantel%2C+Julien%3BFrost%2C+Dan+J%3BNovella%2C+Davide%3BManthilake%2C+Geeth+M%3BJing%2C+Z%3BWang%2C+Y%3BAnonymous&rft.aulast=Chantel&rft.aufirst=Julien&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - High-pressure synchrotron Mossbauer spectroscopy on Fe (sub 4) O (sub 5) AN - 1618134918; 2014-085940 AB - Iron oxides play a crucial role in the geophysical processes and are studied immensely not only to understand the dynamics of the earth's core but also for the enormous potential they hold for technological applications. The study of electronic and magnetic properties of iron oxides under high pressure is essential to enhance our knowledge of these materials and the geophysical phenomena they are involved in. Here, we report the results of Synchrotron Mossbauer Spectroscopy (SMS) in the forward scattering geometry to determine the nuclear hyperfine field parameters of Fe-ions in the recently discovered iron oxide - Fe (sub 4) O (sub 5) . Fe (sub 4) O (sub 5) - synthesized at high pressure and temperature - is stable in the pressure range 5 - 30 GPa and is recoverable in ambient conditions (super 1) . Fe (sub 4) O (sub 5) crystallizes in the orthorhombic Cmcm structure and the Fe atoms occupy three non-equivalent sites at 4a, 8f and 4c Wyckoff positions. 57Fe SMS spectra were collected at several different pressures in the range 0 - 33 GPa. The SMS spectra were fitted using two sites for pressures upto 18 GPa and a single site above 18 GPa. The magnetic properties and electronic environment of the iron sites deduced from the refined hyperfine parameters as a function of pressure will be discussed and compared with the results of standard Mossbauer spectroscopy. JF - American Geophysical Union Fall Meeting AU - Kothapalli, K AU - Kolodziej, T AU - Alp, E AU - Lavina, B AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR43B EP - 2314 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618134918?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=High-pressure+synchrotron+Mossbauer+spectroscopy+on+Fe+%28sub+4%29+O+%28sub+5%29&rft.au=Kothapalli%2C+K%3BKolodziej%2C+T%3BAlp%2C+E%3BLavina%2C+B%3BAnonymous&rft.aulast=Kothapalli&rft.aufirst=K&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Electron spin transition causing structure transformations of Earth's interiors under high pressure AN - 1618133290; 2014-085930 AB - To elucidate the correlation between structure transitions and spin state is one of the crucial problems for understanding the geophysical properties of earth interiors under high pressure. High-pressure studies of iron bearing spinels attract extensive attention in order to understand strong electronic correlation such as the charge transfer, electron hopping, electron high-low spin transition, Jahn-Teller distortion and charge disproponation in the lower mantle or subduction zone [1]. Experiment Structure transitions of Fe3-xSixO4, Fe3-xTixO4 Fe3-xCrxO4 spinel solid solution have been investigated at high pressure up to 60 GPa by single crystal and powder diffraction studies using synchrotron radiation with diamond anvil cell. X-ray emission experiment (XES) at high pressure proved the spin transition of Fe-Kbeta from high spin (HS) to intermediate spin state (IS) or low spin state (LS). Mossbauer experiment and Raman spectra study have been also conducted for deformation analysis of Fe site and confirmation of the configuration change of Fe atoms. Jahn-Teller effect A cubic-to-tetragonal transition under pressure was induced by Jahn-Teller effect of IVFe2+ (3d6) in the tetrahedral site of Fe2TiO4 and FeCr2O4, providing the transformation from 43m (Td) to 42m (D2d). Tetragonal phase is formed by the degeneracy of e orbital of Fe2+ ion. Their c/a ratios are c/a<1 due to dx2-y2 orbital of the electronic tetrahedral configuration. However, Fe3O4 (I), Fe2SiO4 (N), do not have a tetragonal polymorph because of no IVFe2+ ion [2]. Spin transition HS-to-LS transition starts from 15.6 GPa in Fe3O4, 19.6 GPa in Fe2TiO4, 17GPa in Fe2SiO4. The transition is more capable due to VIFe2+ in the octahedral site. The extremely shortened octahedral bonds result in a distortion of 8-fold cation site. This structure change is accelerated by HS-LS transition of Fe2+ in the 8-fold coordination site. Post spinel transition The transition to orthorhombic post-spinel structure with Cmcm has been confirmed in the whole compositional range of Fe3-xTixO4 and Fe3-xCrxO4 . There are M1 and M2 in the orthorhombic phase. Fe2+ and Ti4+ are disordered in the M2 site. At pressures above 53 GPa, Fe2TiO4 structure further transforms to Pmma. This structure change results in the order-disorder transition [2]. New structure of Fe2SiO4 The spin transition exerts an influence to Fe2SiO4 spinel structure and triggers two distinct curves of the lattice constant in the spinel phase. The reversible structure transition from cubic to pseudo-rhombohedral phase was observed at about 45 GPa. This transition is induced by the 20% shrinkage of ionic radius of VIFe2+at the low sin state. Laser heating experiment at 1500 K has confirmed the decomposition from the pseudo-rhombohedral phase to two oxides of FeO and SiO2. JF - American Geophysical Union Fall Meeting AU - Yamanaka, T AU - Kyono, A AU - Kharlamova, S AU - Alp, E AU - Bi, W AU - Mao, H AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR43B EP - 2304 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618133290?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Electron+spin+transition+causing+structure+transformations+of+Earth%27s+interiors+under+high+pressure&rft.au=Yamanaka%2C+T%3BKyono%2C+A%3BKharlamova%2C+S%3BAlp%2C+E%3BBi%2C+W%3BMao%2C+H%3BAnonymous&rft.aulast=Yamanaka&rft.aufirst=T&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Synthesis of a new high-pressure and high-temperature iron oxide, Fe (sub 4) O (sub 5) , a plausible key player in deep subduction processes AN - 1542642499; 2014-047039 AB - Iron oxides have broad geophysical and geochemical relevance due to their abundance, electronic properties and role in redox equilibria. While investigating the stability and decomposition products of siderite (FeCO (sub 3) ) at conditions of the Earth's mantle we obtained, at 10 GPa and about 1800 K, a single crystal of unknown phase. High pressure and temperatures were achieved using a laser heated diamond anvil cell. Diffraction data were obtained using highly focused synchrotron x-rays. Structural solution and refinement of the single crystal diffraction pattern indicate that the phase is a new compound with formula Fe (sub 4) O (sub 5) . The phase has orthorhombic symmetry where iron is 6-coordinated in layers of trigonal prisms and edge-sharing octahedra. First-principle calculations show that Fe (sub 4) O (sub 5) is stable at high pressure with respect to its possible breakdown products (FeO and Fe (sub 3) O (sub 4) in the cubic and orthorhombic structures). We performed several HP-HT syntheses starting from mixtures of pure Fe+Fe (sub 3) O (sub 4) and Fe+Fe (sub 2) O (sub 3) in appropriate proportions. Fe (sub 4) O (sub 5) was synthesized in the range 10-20 GPa readily upon heating at temperature in the range 1500-2500 K. Upon decompression and further heating we observed the decomposition of Fe (sub 4) O (sub 5) at approximately 5 GPa and 1800 K, to wustite and magnetite; whereas cold decompression shows that orthorhombic Fe (sub 4) O (sub 5) is a phase retrievable to ambient conditions. The new Fe-O compound has a broad fundamental and applicative significance, spanning planetary science, physics, chemistry and materials science. Also, the new iron oxide is a plausible phase of deep Earth, considering that it is rather reduced and taking into account the high heterogeneity of the upper mantle. Many peridotite from deep (>200-300 km) subduction zones contain olivine and garnet rich in Fe (sub 3) O (sub 4) lamellae exsolution which attest to the decompression of precursor phases that had formed at profound depths preceding mantle upwelling. Microdiamonds from UHP gneisses also contain abundant Fe (sub x) O (sub y) nanometric inclusions whose structures and stoichiometries are not known yet, though the depth of the host rock subduction is determined as >250 km. These examples and recent findings of iron oxides coexisting with wustite and ferrites as inclusions in superdeep diamonds from Brazil suggest potential areas for searching for natural Fe (sub 4) O (sub 5) within terrestrial rocks. The importance of Fe (sub 4) O (sub 5) would greatly exceed its abundance for the role it might have in redox equilibria that, in turn, affect elements speciation and partitioning. JF - American Geophysical Union Fall Meeting AU - Lavina, B AU - Dera, P K AU - Kim, E AU - Dobrzhinetskaya, Larissa AU - Meng, Y AU - Downs, R T AU - Weck, P F AU - Sutton, S R AU - Zhao, Yusheng AU - Alp, E AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract V51C EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542642499?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Synthesis+of+a+new+high-pressure+and+high-temperature+iron+oxide%2C+Fe+%28sub+4%29+O+%28sub+5%29+%2C+a+plausible+key+player+in+deep+subduction+processes&rft.au=Lavina%2C+B%3BDera%2C+P+K%3BKim%2C+E%3BDobrzhinetskaya%2C+Larissa%3BMeng%2C+Y%3BDowns%2C+R+T%3BWeck%2C+P+F%3BSutton%2C+S+R%3BZhao%2C+Yusheng%3BAlp%2C+E%3BAnonymous&rft.aulast=Lavina&rft.aufirst=B&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-07-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Reference-independent comparative metagenomics using cross-assembly: crAss AN - 1434026922; 18513776 AB - Motivation: Metagenomes are often characterized by high levels of unknown sequences. Reads derived from known microorganisms can easily be identified and analyzed using fast homology search algorithms and a suitable reference database, but the unknown sequences are often ignored in further analyses, biasing conclusions. Nevertheless, it is possible to use more data in a comparative metagenomic analysis by creating a cross-assembly of all reads, i.e. a single assembly of reads from different samples. Comparative metagenomics studies the interrelationships between metagenomes from different samples. Using an assembly algorithm is a fast and intuitive way to link (partially) homologous reads without requiring a database of reference sequences.Results: Here, we introduce crAss, a novel bioinformatic tool that enables fast simple analysis of cross-assembly files, yielding distances between all metagenomic sample pairs and an insightful image displaying the similarities. JF - Bioinformatics AU - Dutilh, Bas E AU - Schmieder, Robert AU - Nulton, Jim AU - Felts, Ben AU - Salamon, Peter AU - Edwards, Robert A AU - Mokili, John L AD - super(1)Centre for Molecular and Biomolecular Informatics, Nijmegen Centre for Molecular Life Sciences, Radboud University Medical Centre, 6525 GA Nijmegen, The Netherlands, super(2)Department of Computer Science, super(3)Department of Biology, super(4)Computational Science Research Center and super(5)Department of Mathematics, San Diego State University, San Diego, CA 92182, USA and super(6)Division of Mathematics and Computer Science, Argonne National Laboratory, IL 60439, USA Y1 - 2012/12// PY - 2012 DA - Dec 2012 SP - 3225 EP - 3231 PB - Oxford University Press, Great Clarendon Street Oxford OX2 6DP United Kingdom VL - 28 IS - 24 SN - 1367-4803, 1367-4803 KW - Biotechnology and Bioengineering Abstracts KW - Databases KW - Data processing KW - Homology KW - Algorithms KW - Microorganisms KW - Bioinformatics KW - Internet KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434026922?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bioinformatics&rft.atitle=Reference-independent+comparative+metagenomics+using+cross-assembly%3A+crAss&rft.au=Dutilh%2C+Bas+E%3BSchmieder%2C+Robert%3BNulton%2C+Jim%3BFelts%2C+Ben%3BSalamon%2C+Peter%3BEdwards%2C+Robert+A%3BMokili%2C+John+L&rft.aulast=Dutilh&rft.aufirst=Bas&rft.date=2012-12-01&rft.volume=28&rft.issue=24&rft.spage=3225&rft.isbn=&rft.btitle=&rft.title=Bioinformatics&rft.issn=13674803&rft_id=info:doi/10.1093%2Fbioinformatics%2Fbts613 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Databases; Data processing; Homology; Microorganisms; Algorithms; Bioinformatics; Internet DO - http://dx.doi.org/10.1093/bioinformatics/bts613 ER - TY - JOUR T1 - Real Time Metagenomics: Using k-mers to annotate metagenomes AN - 1434023793; 18513789 AB - Summary: Annotation of metagenomes involves comparing the individual sequence reads with a database of known sequences and assigning a unique function to each read. This is a time-consuming task that is computationally intensive (though not computationally complex). Here we present a novel approach to annotate metagenomes using unique k-mer oligopeptide sequences from 7 to 12 amino acids long. We demonstrate that k-mer-based annotations are faster and approach the sensitivity and precision of blastx-based annotations without loosing accuracy. A last-common ancestor approach was also developed to describe the members of the community. JF - Bioinformatics AU - Edwards, Robert A AU - Olson, Robert AU - Disz, Terry AU - Pusch, Gordon D AU - Vonstein, Veronika AU - Stevens, Rick AU - Overbeek, Ross AD - super(1)Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, IL 60439, USA, super(2)Department of Biology, super(3)Department of Computer Science, San Diego State University, San Diego, CA 92182, USA, super(4)Computation Institute, University of Chicago, Chicago, IL 60637, USA and super(5)Fellowship for the Interpretation of Genomes, Burr Ridge, IL 60527, USA Y1 - 2012/12// PY - 2012 DA - Dec 2012 SP - 3316 EP - 3317 PB - Oxford University Press, Great Clarendon Street Oxford OX2 6DP United Kingdom VL - 28 IS - 24 SN - 1367-4803, 1367-4803 KW - Biotechnology and Bioengineering Abstracts KW - Databases KW - Data processing KW - Bioinformatics KW - Oligopeptides KW - Internet KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434023793?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bioinformatics&rft.atitle=Real+Time+Metagenomics%3A+Using+k-mers+to+annotate+metagenomes&rft.au=Edwards%2C+Robert+A%3BOlson%2C+Robert%3BDisz%2C+Terry%3BPusch%2C+Gordon+D%3BVonstein%2C+Veronika%3BStevens%2C+Rick%3BOverbeek%2C+Ross&rft.aulast=Edwards&rft.aufirst=Robert&rft.date=2012-12-01&rft.volume=28&rft.issue=24&rft.spage=3316&rft.isbn=&rft.btitle=&rft.title=Bioinformatics&rft.issn=13674803&rft_id=info:doi/10.1093%2Fbioinformatics%2Fbts599 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Databases; Data processing; Bioinformatics; Oligopeptides; Internet DO - http://dx.doi.org/10.1093/bioinformatics/bts599 ER - TY - JOUR T1 - Greenhouse gas emissions at the urban scale AN - 1270038796; 2013-011002 AB - Cities are responsible for more than 70% of global anthropogenic greenhouse gas emissions from buildings, transport, energy, industry, and waste-related sources. Improved urban-scale emission estimates are essential for understanding local trends and providing guidance for mitigation strategies. Current research in cities around the world is focused on establishing more robust methods for quantifying and modeling urban-scale emissions of the most abundant anthropogenic greenhouse gases: carbon dioxide (CO (sub 2) ), methane (CH (sub 4) ), and nitrous oxide (N (sub 2) O). JF - Elements AU - Bellucci, Francesco AU - Bogner, Jean E AU - Sturchio, Neil C Y1 - 2012/12// PY - 2012 DA - December 2012 SP - 445 EP - 449 PB - Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society VL - 8 IS - 6 SN - 1811-5209, 1811-5209 KW - waste water KW - landfills KW - aliphatic hydrocarbons KW - transportation KW - urban environment KW - carbon dioxide KW - denitrification KW - water treatment KW - buildings KW - ecology KW - municipal waste KW - industry KW - methane KW - human activity KW - biochemistry KW - nitrous oxide KW - atmosphere KW - alkanes KW - geochemical cycle KW - organic compounds KW - biogenic processes KW - nitrification KW - hydrocarbons KW - greenhouse gases KW - energy KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270038796?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Elements&rft.atitle=Greenhouse+gas+emissions+at+the+urban+scale&rft.au=Bellucci%2C+Francesco%3BBogner%2C+Jean+E%3BSturchio%2C+Neil+C&rft.aulast=Bellucci&rft.aufirst=Francesco&rft.date=2012-12-01&rft.volume=8&rft.issue=6&rft.spage=445&rft.isbn=&rft.btitle=&rft.title=Elements&rft.issn=18115209&rft_id=info:doi/10.2113%2Fgselements.8.6.445 L2 - http://www.elementsmagazine.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 35 N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - aliphatic hydrocarbons; alkanes; atmosphere; biochemistry; biogenic processes; buildings; carbon dioxide; denitrification; ecology; energy; geochemical cycle; greenhouse gases; human activity; hydrocarbons; industry; landfills; methane; municipal waste; nitrification; nitrous oxide; organic compounds; transportation; urban environment; waste water; water treatment DO - http://dx.doi.org/10.2113/gselements.8.6.445 ER - TY - JOUR T1 - Energy consumption and greenhouse gas emissions from enzyme and yeast manufacture for corn and cellulosic ethanol production AN - 1257759516; 17442843 AB - Enzymes and yeast are important ingredients in the production of ethanol, yet the energy consumption and emissions associated with their production are often excluded from life-cycle analyses of ethanol. We provide new estimates for the energy consumed and greenhouse gases (GHGs) emitted during enzyme and yeast manufacture, including contributions from key ingredients such as starch, glucose, and molasses. We incorporated these data into Argonne National Laboratory's Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation model and observed that enzymes and yeast together contribute 1.4 and 27 % of farm-to-pump GHG emissions for corn and cellulosic ethanol, respectively. Over the course of the entire corn ethanol life cycle, yeast and enzymes contribute a negligible amount of GHG emissions, but increase GHG emissions from the cellulosic ethanol life cycle by 5.6 g CO sub(2)e/MJ. JF - Biotechnology Letters AU - Dunn, Jennifer B AU - Mueller, Steffen AU - Wang, Michael AU - Han, Jeongwoo AD - Argonne National Laboratory, Center for Transportation Research, 9700 South Cass Avenue, Argonne, IL, 60439, USA, jdunn@anl.gov Y1 - 2012/12// PY - 2012 DA - Dec 2012 SP - 2259 EP - 2263 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 34 IS - 12 SN - 0141-5492, 0141-5492 KW - Microbiology Abstracts C: Algology, Mycology & Protozoology; Biotechnology and Bioengineering Abstracts KW - Data processing KW - Molasses KW - Glucose KW - Enzymes KW - Life cycle KW - Greenhouse gases KW - Starch KW - Ethanol KW - Greenhouses KW - W 30935:Food Biotechnology KW - K 03320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1257759516?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biotechnology+Letters&rft.atitle=Energy+consumption+and+greenhouse+gas+emissions+from+enzyme+and+yeast+manufacture+for+corn+and+cellulosic+ethanol+production&rft.au=Dunn%2C+Jennifer+B%3BMueller%2C+Steffen%3BWang%2C+Michael%3BHan%2C+Jeongwoo&rft.aulast=Dunn&rft.aufirst=Jennifer&rft.date=2012-12-01&rft.volume=34&rft.issue=12&rft.spage=2259&rft.isbn=&rft.btitle=&rft.title=Biotechnology+Letters&rft.issn=01415492&rft_id=info:doi/10.1007%2Fs10529-012-1057-6 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-12-01 N1 - Last updated - 2015-05-27 N1 - SubjectsTermNotLitGenreText - Data processing; Molasses; Glucose; Life cycle; Enzymes; Starch; Greenhouse gases; Greenhouses; Ethanol DO - http://dx.doi.org/10.1007/s10529-012-1057-6 ER - TY - JOUR T1 - Pitfalls in the interpretation of structural changes in mutant proteins from crystal structures AN - 1257756001; 17444278 AB - PpcA is a small protein with 71 residues that contains three covalently bound hemes. The structures of single mutants at residue 58 have shown larger deviations in another part of the protein molecule than at the site of the mutation. Closer examination of the crystal packing has revealed the origin of this unexpected structural change. The site of mutation is within Van der Waals distance from another protein molecule related by a crystallographic twofold axis within the crystal. The structural changes occurred at or near the mutation site have led to a slight adjustment of the surface residues in contact. The observed deviations between the native and the mutant molecular structures are derived from the new crystal packing even though the two crystals are essentially isomorphous. Without careful consideration of the crystal lattice a non-expert looking at only the coordinates deposited in the Protein Data Bank could draw erroneous conclusion that mutation in one part of the molecule affected the structure of the protein in a distant part of the molecule. JF - Journal of Structural and Functional Genomics AU - Pokkuluri, PR AU - Yang, X AU - Londer, Y Y AU - Schiffer, M AD - Biosciences Division, Argonne National Laboratory, Lemont, IL, 60439, USA, mschiffer@anl.gov Y1 - 2012/12// PY - 2012 DA - Dec 2012 SP - 227 EP - 232 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 13 IS - 4 SN - 1345-711X, 1345-711X KW - Biotechnology and Bioengineering Abstracts; Genetics Abstracts KW - Crystal structure KW - Crystals KW - Data banks KW - Mutation KW - Packing KW - Structure-function relationships KW - G 07880:Human Genetics KW - W 30940:Products UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1257756001?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Structural+and+Functional+Genomics&rft.atitle=Pitfalls+in+the+interpretation+of+structural+changes+in+mutant+proteins+from+crystal+structures&rft.au=Pokkuluri%2C+PR%3BYang%2C+X%3BLonder%2C+Y+Y%3BSchiffer%2C+M&rft.aulast=Pokkuluri&rft.aufirst=PR&rft.date=2012-12-01&rft.volume=13&rft.issue=4&rft.spage=227&rft.isbn=&rft.btitle=&rft.title=Journal+of+Structural+and+Functional+Genomics&rft.issn=1345711X&rft_id=info:doi/10.1007%2Fs10969-012-9147-1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-12-01 N1 - Last updated - 2012-12-28 N1 - SubjectsTermNotLitGenreText - Data banks; Structure-function relationships; Crystal structure; Packing; Crystals; Mutation DO - http://dx.doi.org/10.1007/s10969-012-9147-1 ER - TY - JOUR T1 - Levitation lifts drug hopes AN - 1197523915 JF - FT.com AU - Clive Cookson from the Argonne National Laboratory AU - Illinois Y1 - 2012/11/23/ PY - 2012 DA - 2012 Nov 23 CY - London PB - The Financial Times Limited KW - Business And Economics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1197523915?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aabiglobal&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=unknown&rft.jtitle=FT.com&rft.atitle=Levitation+lifts+drug+hopes&rft.au=Clive+Cookson+from+the+Argonne+National+Laboratory%3BIllinois&rft.aulast=Clive+Cookson+from+the+Argonne+National+Laboratory&rft.aufirst=&rft.date=2012-11-23&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=FT.com&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Central N1 - Copyright - (Copyright Financial Times Ltd. 2012. All rights reserved.) N1 - Last updated - 2012-11-26 ER - TY - JOUR T1 - Integrated solutions for hydrologic investigations in arid lands AN - 1270041348; 2013-006114 AB - Hydrological assessment studies across vast regions of the arid world are often hindered by the inaccessibility of these areas and the paucity of data sets, as well as the high expenses and difficulties entailed in acquiring these data sets, their unpublished nature, and their varying scales, projections, and datum. Using the Eastern Desert (ED) of Egypt (225,000 km (super 2) ) and the Sinai Peninsula (61,000 km (super 2) ) as test sites, we demonstrate practical and cost-effective integrated (geochemistry, geophysics, and modeling) solutions that utilize web-based geographic information system (GIS) (http://www.esrs.wmich.edu/webmap) technologies and take advantage of readily available global remote sensing data sets. Adopted methodologies allowed: (1) development of conceptual models for hydrogeologic settings conducive to groundwater entrapment and augmentation, including groundwater in fractured basement aquifers, groundwater impounded by dike swarms crosscutting alluvial aquifers, and groundwater residing in alluvial aquifers associated with ascending deep-seated fossil waters; (2) selection of criteria to identify and validate the preferred distribution of each of these aquifer types and usage of the selected criteria and observations from the GIS data sets to identify, test, and refine potential well locations; and (3) construction and calibration of hydrologic models to estimate average annual recharge over the major watersheds in the Sinai (463 X 10 (super 6) m (super 3) /yr) and ED (171 X 10 (super 6) m (super 3) /yr) and the average modern contributions to Nubian fossil aquifers (Sinai: 13 X 10 (super 6) m (super 3) /yr), and to model the partitioning of precipitation as a function of precipitation amounts. The successful application of the integrated and cost-effective methodologies developed for the study areas should invite similar applications in arid regions elsewhere. JF - Geosphere AU - Becker, Doris AU - Sultan, Mohamed AU - Milewski, Adam AU - Becker, Richard AU - Sauck, William AU - Soliman, Farouk AU - Rashed, Mohamed AU - Ahmed, Mohamed AU - Yan, Eugene AU - Wagdy, Ahmad AU - Chouinard, Kyle AU - Welton, Benjamin Y1 - 2012/11/16/ PY - 2012 DA - 2012 Nov 16 PB - Geological Society of America, Boulder, CO VL - Pre-Issue Publication KW - terrestrial environment KW - North Africa KW - arid environment KW - SWAT model KW - Sinai KW - satellite methods KW - ground water KW - aquifers KW - models KW - Egypt KW - recharge KW - geographic information systems KW - Soil Water Assessment Tool KW - Africa KW - information systems KW - water wells KW - water resources KW - Eastern Desert KW - remote sensing KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041348?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geosphere&rft.atitle=Integrated+solutions+for+hydrologic+investigations+in+arid+lands&rft.au=Becker%2C+Doris%3BSultan%2C+Mohamed%3BMilewski%2C+Adam%3BBecker%2C+Richard%3BSauck%2C+William%3BSoliman%2C+Farouk%3BRashed%2C+Mohamed%3BAhmed%2C+Mohamed%3BYan%2C+Eugene%3BWagdy%2C+Ahmad%3BChouinard%2C+Kyle%3BWelton%2C+Benjamin&rft.aulast=Becker&rft.aufirst=Doris&rft.date=2012-11-16&rft.volume=Pre-Issue+Publication&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Geosphere&rft.issn=1553-040X&rft_id=info:doi/10.1130%2FGES00777.1 L2 - http://www.gsajournals.org/perlserv/?request=get-archive&issn=1553-040X LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 65 N1 - PubXState - CO N1 - Document feature - illus. incl. 3 tables, geol. sketch map N1 - Last updated - 2014-01-02 N1 - SubjectsTermNotLitGenreText - Africa; aquifers; arid environment; Eastern Desert; Egypt; geographic information systems; ground water; information systems; models; North Africa; recharge; remote sensing; satellite methods; Sinai; Soil Water Assessment Tool; SWAT model; terrestrial environment; water resources; water wells DO - http://dx.doi.org/10.1130/GES00777.1 ER - TY - JOUR T1 - Calcite (1 0 4)-water interface structure, revisited AN - 1282821513; 2013-013734 AB - The structure of the calcite (1 0 4)-water interface is reassessed using a new set of high-precision specular X-ray reflectivity measurements. In situ measurements of the specular reflectivity signal to a vertical structural resolution of 0.45 Aa are used to define the interfacial structure, including vertical displacement patterns of the Ca and CO (sub 3) groups as well as the nature of interfacial water. These new data show two organized interfacial water layers, consistent with previous results, and distortion of the interfacial calcite structure to a depth of four to six unit cells, at least two deeper than previously reported. These results are in reasonable agreement with recent computational studies, at least in terms of the locations of the first and second water layers. The difference between the interfacial structure derived from previous X-ray reflectivity results and that presented here emphasizes the need for high-precision measurements to provide a robust understanding of the interfacial structures of reactive minerals in aqueous environments. Abstract Copyright (2012) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Fenter, P AU - Sturchio, N C Y1 - 2012/11/15/ PY - 2012 DA - 2012 Nov 15 SP - 58 EP - 69 PB - Elsevier, New York, NY VL - 97 SN - 0016-7037, 0016-7037 KW - water KW - X-ray diffraction data KW - data processing KW - optimization KW - crystal structure KW - aqueous solutions KW - hydrochemistry KW - calcite KW - models KW - reactivity KW - X-ray data KW - water-rock interaction KW - calcium carbonate KW - crystal chemistry KW - carbonates KW - aquatic environment KW - 01C:Mineralogy of non-silicates KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282821513?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Calcite+%281+0+4%29-water+interface+structure%2C+revisited&rft.au=Fenter%2C+P%3BSturchio%2C+N+C&rft.aulast=Fenter&rft.aufirst=P&rft.date=2012-11-15&rft.volume=97&rft.issue=&rft.spage=58&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2012.08.021 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 48 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-02-05 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - aquatic environment; aqueous solutions; calcite; calcium carbonate; carbonates; crystal chemistry; crystal structure; data processing; hydrochemistry; models; optimization; reactivity; water; water-rock interaction; X-ray data; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.gca.2012.08.021 ER - TY - CPAPER T1 - Key Outcomes from Year One of EcoCAR 2: Plugging In To The Future T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313089842; 6172432 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Lambiase, Nicole AU - Benoy, Brian AU - Alley, Robert Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Mechanical engineering UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313089842?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Key+Outcomes+from+Year+One+of+EcoCAR+2%3A+Plugging+In+To+The+Future&rft.au=Lambiase%2C+Nicole%3BBenoy%2C+Brian%3BAlley%2C+Robert&rft.aulast=Lambiase&rft.aufirst=Nicole&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Interaction between carbon nanotubes and soil colloids studied with X-ray spectromicroscopy AN - 1282822235; 2013-015689 AB - To improve the understanding of the effect of carbon nanotubes (CNTs) on the environment, the characterization of CNTs and their interaction with soils needs to be assessed. Here, we demonstrate an analysis of pristine and modified CNTs, in dry and wet state using soft X-ray spectromicroscopy with energies around the C 1s K-shell edge (280eV-300eV). Apart from that, suspensions of the CNTs and the colloidal fraction as well as the extracted humic substances of a chernozem soil sample were studied. The effect of the different sample environments on the CNTs were observable both in the microscopic images and the spectral data, e.g., in aqueous environment the CNTs built clusters. Since CNTs are mainly analyzed under sterile laboratory conditions, this study intends to show how to investigate CNTs and their interaction with other substances under ambient conditions. One of the major objectives was, whether differences between CNTs and organic soil particles are distinguishable at all, and subsequently, how to describe the observed interactions. Abstract Copyright (2012) Elsevier, B.V. JF - Chemical Geology AU - Sedlmair, Julia AU - Gleber, Sophie-Charlotte AU - Wirick, Sue AU - Guttmann, Peter AU - Thieme, Juergen Y1 - 2012/11/03/ PY - 2012 DA - 2012 Nov 03 SP - 32 EP - 41 PB - Elsevier, Amsterdam VL - 329 SN - 0009-2541, 0009-2541 KW - soils KW - colloidal materials KW - textures KW - X-ray spectra KW - microscope methods KW - carbon KW - EXAFS data KW - spectra KW - crystal chemistry KW - Chernozems KW - chemical composition KW - nanoparticles KW - 02C:Geochemistry of rocks, soils, and sediments KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282822235?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Interaction+between+carbon+nanotubes+and+soil+colloids+studied+with+X-ray+spectromicroscopy&rft.au=Sedlmair%2C+Julia%3BGleber%2C+Sophie-Charlotte%3BWirick%2C+Sue%3BGuttmann%2C+Peter%3BThieme%2C+Juergen&rft.aulast=Sedlmair&rft.aufirst=Julia&rft.date=2012-11-03&rft.volume=329&rft.issue=&rft.spage=32&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2011.08.009 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 50 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2013-02-05 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - carbon; chemical composition; Chernozems; colloidal materials; crystal chemistry; EXAFS data; microscope methods; nanoparticles; soils; spectra; textures; X-ray spectra DO - http://dx.doi.org/10.1016/j.chemgeo.2011.08.009 ER - TY - JOUR T1 - Micro- and nano-environments of carbon sequestration; multi-element STXM-NEXAFS spectromicroscopy assessment of microbial carbon and mineral associations AN - 1282821213; 2013-015691 AB - Soil represents the largest reservoir of terrestrial organic C, and plays a critical role in global C cycling. In light of predicted climate change and a more unified approach to mitigate greenhouse gas emissions, the soil's ability to sequester C, and thus to act as a sink or a source for atmospheric CO (sub 2) has received growing interest. Organomineral assemblages are a unique niche in C cycling, with large capacity for storing anthropogenic C. However, the underlying biogeochemical mechanisms for C sequestration through organomineral associations are not yet well understood. One of the major challenges to study C sequestration in organomineral assemblages is lack of non-invasive analytical tools with a potential to obtain molecular-level information about the interactions between C and mineral components in submicron geochemical environments. In the present study, we have effectively employed synchrotron-based STXM-NEXAFS spectroscopy to access the K- and L-edges of biogeochemically relevant elements (C, N, Ca, Fe, Al, Si) to identify and image micro- and nano-C sequestration environments, and conduct submicron-level investigation of the compositional chemistry and other interactive features of C and minerals present in these hotspots using ultrathin section of intact organomineral assemblage. The C K-edge NEXAFS spectromicroscopy micrographs clearly demonstrated the existence of spatially distinct seemingly terminal micro- and nano-C repository zones, where organic C was sequestered in apparent agglomeration in the investigated organomineral assemblage. These submicron-C repository environments were only a few micrometers apart from each other; yet they were considerably different compositionally from each other. The organic C in the first repository environment was pyrogenic in origin, largely composed of quinone, phenols, ketones and aromatic ring structures. However, the second hotspot was dominated by filament-like structure, with striking similarity to the C 1s NEXAFS spectral signatures of organic C isolated from soil fungal and bacteria, and dominated by resonances from aliphatic-C and C=N bonds of imidazol structures, carboxyl/carbonyl-C, amide- and O-alkyl-C functionalities. The composition of organic C in the organomineral interface around the strand-like structure was highly complex and composed of polysaccharides, amino sugars, amino acids, nucleic acids, and phospholipid fatty acid structures with polar and non-polar termini. The chemistry of mineral matter in the organomineral interface was also equally complex, ranging from Ca, Fe and Al ions, Fe and Al oxides, hydroxides and oxyhydroxides to phyllosilicates, which could provide a variety of polyvalent cations, hydroxyl surface functional groups and edge sites that can attract and bind microbial biomolecules. Based on the enormous complexity of the organic C functionalities and the coexistence of various inorganic components in the organomineral interface, it is possible to suggest that no single binding mechanism could be accountable for the organic C stored in the investigated submicron-C repository environment. Our results seem to suggest that the apparent C sequestration in the micro- and nano-C repository environment appear to be the cumulative result of physical protection and heterogeneous binding mechanisms ranging from ion exchange, hydrogen bonding, and hydrophobic bonding on silicate clay-organic complexes to adsorption on external and internal surfaces of clay minerals. Abstract Copyright (2012) Elsevier, B.V. JF - Chemical Geology AU - Solomon, Dawit AU - Lehmann, Johannes AU - Harden, Jennifer AU - Wang, Jian AU - Kinyangi, James AU - Heymann, Karen AU - Karunakaran, Chithra AU - Lu, Yingshen AU - Wirick, Sue AU - Jacobsen, Chris Y1 - 2012/11/03/ PY - 2012 DA - 2012 Nov 03 SP - 53 EP - 73 PB - Elsevier, Amsterdam VL - 329 SN - 0009-2541, 0009-2541 KW - silicates KW - scanning transmission X-ray microscopy KW - climate change KW - carbon dioxide KW - air pollution KW - XANES spectra KW - environmental management KW - STXM KW - carbon KW - X-ray analysis KW - spectra KW - mineral assemblages KW - organic carbon KW - chemical composition KW - climate KW - acids KW - carbon sequestration KW - biochemistry KW - pollution KW - adsorption KW - X-ray spectra KW - clay minerals KW - organic compounds KW - organic acids KW - microscope methods KW - X-ray spectroscopy KW - EXAFS data KW - sheet silicates KW - crystal chemistry KW - spectroscopy KW - nanoparticles KW - 22:Environmental geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282821213?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Micro-+and+nano-environments+of+carbon+sequestration%3B+multi-element+STXM-NEXAFS+spectromicroscopy+assessment+of+microbial+carbon+and+mineral+associations&rft.au=Solomon%2C+Dawit%3BLehmann%2C+Johannes%3BHarden%2C+Jennifer%3BWang%2C+Jian%3BKinyangi%2C+James%3BHeymann%2C+Karen%3BKarunakaran%2C+Chithra%3BLu%2C+Yingshen%3BWirick%2C+Sue%3BJacobsen%2C+Chris&rft.aulast=Solomon&rft.aufirst=Dawit&rft.date=2012-11-03&rft.volume=329&rft.issue=&rft.spage=53&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2012.02.002 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 70 N1 - Document feature - illus. incl. table N1 - Last updated - 2013-04-19 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - acids; adsorption; air pollution; biochemistry; carbon; carbon dioxide; carbon sequestration; chemical composition; clay minerals; climate; climate change; crystal chemistry; environmental management; EXAFS data; microscope methods; mineral assemblages; nanoparticles; organic acids; organic carbon; organic compounds; pollution; scanning transmission X-ray microscopy; sheet silicates; silicates; spectra; spectroscopy; STXM; X-ray analysis; X-ray spectra; X-ray spectroscopy; XANES spectra DO - http://dx.doi.org/10.1016/j.chemgeo.2012.02.002 ER - TY - JOUR T1 - Modeling biogeochemical impacts of bioenergy buffers with perennial grasses for a row-crop field in Illinois AN - 1776651819; PQ0002796841 AB - Current research on the environmental sustainability of bioenergy has largely focused on the potential of bioenergy crops to sequester carbon and mitigate greenhouse gas emissions and possible impacts on water quality and quantity. A key assumption in these studies is that bioenergy crops will be grown in a manner similar to current agricultural crops such as corn and hence would affect the environment similarly. In this study, we investigate an alternative cropping system where bioenergy crops are grown in buffer strips adjacent to current agricultural crops such that nutrients present in runoff and leachate from the traditional row-crops are reused by the bioenergy crops (switchgrass, miscanthus and native prairie grasses) in the buffer strips, thus providing environmental services and meeting economic needs of farmers. The process-based biogeochemical model Denitrification-Decomposition (DNDC) was used to simulate crop yield, nitrous oxide production and nitrate concentrations in leachate for a typical agricultural field in Illinois. Model parameters have been developed for the first time for miscanthus and switchgrass in DNDC. Results from model simulations indicated that growing bioenergy crops in buffer strips mitigated nutrient runoff, reduced nitrate concentrations in leachate by 60-70% and resulted in a reduction of 50-90% in nitrous oxide emissions compared with traditional cropping systems. While all the bioenergy crop buffers had significant positive environmental benefits, switchgrass performed the best with respect to minimizing nutrient runoff and nitrous oxide emissions, while miscanthus had the highest yield. Overall, our model results indicated that the bioenergy crops grown in these buffer strips achieved yields that are comparable to those obtained for traditional agricultural systems while simultaneously providing environmental services and could be used to design sustainable agricultural landscapes. JF - GCB Bioenergy AU - Gopalakrishnan, Gayathri AU - Cristina Negri, MARIA AU - Salas, William AD - Energy Systems Division, Argonne National Laboratory, 9700 S Cass Avenue, Argonne, IL, 60439, USA. Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 739 EP - 750 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 4 IS - 6 SN - 1757-1693, 1757-1693 KW - Environment Abstracts; Pollution Abstracts; Sustainability Science Abstracts; Ecology Abstracts KW - Nitrate KW - Grasses KW - Nutrients KW - Water quality KW - Crops KW - Models KW - Prairies KW - Agricultural land KW - Carbon KW - Nitrous oxide KW - Buffers KW - Economics KW - Emissions KW - Miscanthus KW - Nitrates KW - USA, Illinois KW - Biogeochemistry KW - Landscape KW - Sustainability KW - Greenhouses KW - Leachates KW - Biofuels KW - Runoff KW - ENA 03:Energy KW - P 0000:AIR POLLUTION KW - M3 1010:Issues in Sustainable Development KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1776651819?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=GCB+Bioenergy&rft.atitle=Modeling+biogeochemical+impacts+of+bioenergy+buffers+with+perennial+grasses+for+a+row-crop+field+in+Illinois&rft.au=Gopalakrishnan%2C+Gayathri%3BCristina+Negri%2C+MARIA%3BSalas%2C+William&rft.aulast=Gopalakrishnan&rft.aufirst=Gayathri&rft.date=2012-11-01&rft.volume=4&rft.issue=6&rft.spage=739&rft.isbn=&rft.btitle=&rft.title=GCB+Bioenergy&rft.issn=17571693&rft_id=info:doi/10.1111%2Fj.1757-1707.2011.01145.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-03-01 N1 - Last updated - 2016-07-20 N1 - SubjectsTermNotLitGenreText - Nitrate; Grasses; Landscape; Nutrients; Water quality; Crops; Models; Greenhouses; Prairies; Carbon; Nitrous oxide; Economics; Leachates; Runoff; Nitrates; Biogeochemistry; Sustainability; Agricultural land; Buffers; Emissions; Biofuels; Miscanthus; USA, Illinois DO - http://dx.doi.org/10.1111/j.1757-1707.2011.01145.x ER - TY - JOUR T1 - Multi-decadal decline of mercury in the North Atlantic atmosphere explained by changing subsurface seawater concentrations AN - 1542643946; 2014-048219 AB - We analyze 1977-2010 trends in atmospheric mercury (Hg) from 21 ship cruises over the North Atlantic (NA) and 15 over the South Atlantic (SA). We find a steep 1990-2009 decline of -0.046+ or -0.010 ng m (super -3) a (super -1) (-2.5% a (super -1) ) over the NA (steeper than at Northern Hemispheric land sites) but no significant decline over the SA. Surface water Hg (super 0) measurements in the NA show a decline of -5.7% a (super -1) since 1999, and limited subsurface ocean data show an approximately 80% decline from 1980 to present. We use a coupled global atmosphere-ocean model to show that the decline in NA atmospheric concentrations can be explained by decreasing oceanic evasion from the NA driven by declining subsurface water Hg concentrations. We speculate that this large historical decline of Hg in the NA Ocean could have been caused by decreasing Hg inputs from rivers and wastewater and by changes in the oxidant chemistry of the atmospheric marine boundary layer. Abstract Copyright (2012), American Geophysical Union. All Rights Reserved. JF - Geophysical Research Letters AU - Soerensen, Anne L AU - Jacob, Daniel J AU - Streets, David G AU - Witt, Melanie L I AU - Ebinghaus, Ralf AU - Mason, Robert P AU - Andersson, Maria AU - Sunderland, Elsie M Y1 - 2012/11// PY - 2012 DA - November 2012 EP - L21810 PB - American Geophysical Union, Washington, DC VL - 39 IS - 21 SN - 0094-8276, 0094-8276 KW - decadal variations KW - ocean circulation KW - sea water KW - stream transport KW - sea surface water KW - biochemistry KW - atmosphere KW - hydrochemistry KW - geochemical cycle KW - transport KW - metals KW - trace elements KW - North Atlantic KW - discharge KW - chemical composition KW - geochemistry KW - Atlantic Ocean KW - mercury KW - 07:Oceanography KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542643946?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Letters&rft.atitle=Multi-decadal+decline+of+mercury+in+the+North+Atlantic+atmosphere+explained+by+changing+subsurface+seawater+concentrations&rft.au=Soerensen%2C+Anne+L%3BJacob%2C+Daniel+J%3BStreets%2C+David+G%3BWitt%2C+Melanie+L+I%3BEbinghaus%2C+Ralf%3BMason%2C+Robert+P%3BAndersson%2C+Maria%3BSunderland%2C+Elsie+M&rft.aulast=Soerensen&rft.aufirst=Anne&rft.date=2012-11-01&rft.volume=39&rft.issue=21&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Letters&rft.issn=00948276&rft_id=info:doi/10.1029%2F2012GL053736 L2 - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291944-8007/issues LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom N1 - Date revised - 2014-01-01 N1 - Number of references - 40 N1 - PubXState - DC N1 - Document feature - illus. N1 - Last updated - 2014-07-04 N1 - CODEN - GPRLAJ N1 - SubjectsTermNotLitGenreText - Atlantic Ocean; atmosphere; biochemistry; chemical composition; decadal variations; discharge; geochemical cycle; geochemistry; hydrochemistry; mercury; metals; North Atlantic; ocean circulation; sea surface water; sea water; stream transport; trace elements; transport DO - http://dx.doi.org/10.1029/2012GL053736 ER - TY - JOUR T1 - Synthesis of a new high-pressure and high-temperature iron oxide, Fe (sub 4) O (sub 5) , a plausible key player in deep Earth processes AN - 1434008459; 2013-072090 AB - Iron oxides have broad geophysical and geochemical relevance due to their abundance, electronic properties and role in redox equilibria. While investigating the stability and decomposition products of siderite (FeCO (sub 3) ) at conditions of the Earth's mantle we obtained, at 10 GPa and about 1800 K, a single crystal of unknown phase. Diffraction data were obtained using highly focused synchrotron x-rays. Structural solution and refinement of the single crystal diffraction pattern indicate that the phase is a new compound with formula Fe (sub 4) O (sub 5) [1]. The phase has orthorhombic symmetry where iron is 6-coordinated in layers of trigonal prisms and edge-sharing octahedra. First-principle calculations show that Fe (sub 4) O (sub 5) is stable at high pressure with respect to its possible breakdown products. We performed several HP-HT syntheses starting from mixtures of pure Fe+Fe (sub 3) O (sub 4) and Fe+Fe (sub 2) O (sub 3) . Fe (sub 4) O (sub 5) was synthesized in the range 10-20 GPa readily upon heating at temperature in the range 1500-2500 K. Upon decompression and further heating we observed the decomposition of Fe (sub 4) O (sub 5) at approximately 5GPa and 1800K, to wuestite and magnetite; whereas cold decompression shows that orthorhombic Fe (sub 4) O (sub 5) is a phase retrievable to ambient conditions. The new Fe-O compound has a broad fundamental and applicative significance, spanning planetary science, physics, chemistry and materials science. Also, the new iron oxide is a plausible phase of deep Earth, considering that it is rather reduced and taking into account the high heterogeneity of the upper mantle. Many peridotite from deep (>200-300km) subduction zones contain olivine and garnet rich in Fe (sub 3) O (sub 4) lamellae exsolution which attest to the decompression of precursor phases that had formed at profound depths preceding mantle upwelling [2]. Microdiamonds from UHP gneisses also contain abundant Fe (sub x) O (sub y) nanometric inclusions whose structures and stoichiometries are not known yet, though the depth of the host rock subduction is determined as >250 km [3]. These examples and recent findings of iron oxides coexisting with wuestite and ferrites as inclusions in superdeep diamonds from Brazil [4] suggest potential areas for searching for natural Fe (sub 4) O (sub 5) within terrestrial rocks. [1] Lavina et al., PNAS, 2011. [2] Zhang et al., Am. Mineral, 1999. [3] Dobrzhinetskaya, Gondwana Res., 2012. [4] Wirth et al., EOS Transactions AGU 2009. JF - Abstracts with Programs - Geological Society of America AU - Lavina, Barbara AU - Dera, Przemyslaw AU - Kim, Eunja AU - Dobrzhinetskaya, Larissa AU - Meng, Yue AU - Downs, Robert T AU - Weck, Philippe AU - Sutton, Stephen R AU - Zhao, Yusheng AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 199 EP - 200 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - pressure KW - iron oxides KW - oxides KW - phase transitions KW - high pressure KW - P-T conditions KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434008459?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Synthesis+of+a+new+high-pressure+and+high-temperature+iron+oxide%2C+Fe+%28sub+4%29+O+%28sub+5%29+%2C+a+plausible+key+player+in+deep+Earth+processes&rft.au=Lavina%2C+Barbara%3BDera%2C+Przemyslaw%3BKim%2C+Eunja%3BDobrzhinetskaya%2C+Larissa%3BMeng%2C+Yue%3BDowns%2C+Robert+T%3BWeck%2C+Philippe%3BSutton%2C+Stephen+R%3BZhao%2C+Yusheng%3BAnonymous&rft.aulast=Lavina&rft.aufirst=Barbara&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=199&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-09-20 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - high pressure; iron oxides; oxides; P-T conditions; phase transitions; pressure ER - TY - JOUR T1 - Cadmium intake and systemic exposure in postmenopausal women and age-matched men who smoke cigarettes. AN - 1237084023; 22831969 AB - Mean blood cadmium (B-Cd) concentrations are two- to threefold higher in smokers than in nonsmokers. The basis for this phenomenon is not well understood. We conducted a detailed, multifaceted study of cadmium exposure in smokers. Groups were older smokers (62±4 years, n = 25, 20% male) and nonsmokers (62±3 years, n = 16, 31% male). Each subject's cigarettes were machine smoked, generating individually paired measures of inhaled cadmium (I-Cd) versus B-Cd; I-Cd and B-Cd were each evaluated three times, at monthly intervals. Urine cadmium (U-Cd) was analyzed for comparison. In four smokers, a duplicate-diet study was conducted, along with a kinetic study of plasma cadmium versus B-Cd. Female smokers had a mean B-Cd of 1.21ng Cd/ml, with a nearly 10-fold range (0.29-2.74ng Cd/ml); nonsmokers had a lower mean B-Cd, 0.35ng Cd/ml (p < 0.05), and narrower range (0.20-0.61ng Cd/ml). Means and ranges for males were similar. Estimates of cadmium amounts inhaled daily for our subjects smoking ≥ 20 cigarettes/day were far less than the 15 µg Cd reported to be ingested daily via diet. This I-Cd amount was too low to alone explain the 3.5-fold elevation of B-Cd in our smokers, even assuming greater cadmium absorption via lungs than gastrointestinal tract; cadmium accumulated in smokers' lungs may provide the added cadmium. Finally, B-Cd appeared to be linearly related to I-Cd values in 75% of smokers, whereas 25% had far higher B-Cd, implying a possible heterogeneity among smokers regarding circulating cadmium concentrations and potentially cadmium toxicity. JF - Toxicological sciences : an official journal of the Society of Toxicology AU - Ebert-McNeill, Andrea AU - Clark, Sara P AU - Miller, James J AU - Birdsall, Paige AU - Chandar, Manisha AU - Wu, Lucia AU - Cerny, Elizabeth A AU - Hall, Patricia H AU - Johnson, Maribeth H AU - Isales, Carlos AU - Chutkan, Norman AU - Bhattacharyya, Maryka H AD - Argonne National Laboratory, Lemont, Illinois 60439, USA. Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 191 EP - 204 VL - 130 IS - 1 KW - Cadmium Compounds KW - 0 KW - Smoke KW - Index Medicus KW - Environmental Monitoring KW - Smoke -- adverse effects KW - Humans KW - Middle Aged KW - Male KW - Female KW - Postmenopause -- metabolism KW - Smoking -- metabolism KW - Cadmium Compounds -- metabolism KW - Cadmium Compounds -- analysis KW - Smoking -- adverse effects KW - Tobacco -- adverse effects KW - Inhalation Exposure -- adverse effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1237084023?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Toxicological+sciences+%3A+an+official+journal+of+the+Society+of+Toxicology&rft.atitle=Cadmium+intake+and+systemic+exposure+in+postmenopausal+women+and+age-matched+men+who+smoke+cigarettes.&rft.au=Ebert-McNeill%2C+Andrea%3BClark%2C+Sara+P%3BMiller%2C+James+J%3BBirdsall%2C+Paige%3BChandar%2C+Manisha%3BWu%2C+Lucia%3BCerny%2C+Elizabeth+A%3BHall%2C+Patricia+H%3BJohnson%2C+Maribeth+H%3BIsales%2C+Carlos%3BChutkan%2C+Norman%3BBhattacharyya%2C+Maryka+H&rft.aulast=Ebert-McNeill&rft.aufirst=Andrea&rft.date=2012-11-01&rft.volume=130&rft.issue=1&rft.spage=191&rft.isbn=&rft.btitle=&rft.title=Toxicological+sciences+%3A+an+official+journal+of+the+Society+of+Toxicology&rft.issn=1096-0929&rft_id=info:doi/10.1093%2Ftoxsci%2Fkfs226 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-03-27 N1 - Date created - 2012-10-19 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1093/toxsci/kfs226 ER - TY - CPAPER T1 - Microfluidic Platforms for Time Resolved Laue Crystallography T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313121587; 6166828 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Perry, Sarah AU - Guha, Sudipto AU - Pawate, Ashtamurthy AU - Ren, Zhong AU - Kenis, Paul Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Microfluidics KW - Crystallography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313121587?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Microfluidic+Platforms+for+Time+Resolved+Laue+Crystallography&rft.au=Perry%2C+Sarah%3BGuha%2C+Sudipto%3BPawate%2C+Ashtamurthy%3BRen%2C+Zhong%3BKenis%2C+Paul&rft.aulast=Perry&rft.aufirst=Sarah&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Multi-Domain Mixed Potential Model for Spent Fuel Dissolution T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313121397; 6166755 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Frey, Kurt AU - Jerden Jr, James Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Fuels KW - Dissolution KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313121397?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Multi-Domain+Mixed+Potential+Model+for+Spent+Fuel+Dissolution&rft.au=Frey%2C+Kurt%3BJerden+Jr%2C+James&rft.aulast=Frey&rft.aufirst=Kurt&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Electric Field Assisted Oxidation and Oxide Growth On Metal Surfaces T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313121208; 6166240 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Sankaranarayanan, Subramanian AU - Subbaraman, Ram AU - Ramanathan, Shriram Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Oxidation KW - Metals KW - Electric fields KW - Growth KW - oxides UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313121208?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Electric+Field+Assisted+Oxidation+and+Oxide+Growth+On+Metal+Surfaces&rft.au=Sankaranarayanan%2C+Subramanian%3BSubbaraman%2C+Ram%3BRamanathan%2C+Shriram&rft.aulast=Sankaranarayanan&rft.aufirst=Subramanian&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Energy Levels, Electronic Properties, and Rectification in Ultrathin P-NiO Films Synthesized by Atomic Layer Deposition T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313112413; 6167940 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Thimsen, Elijah AU - Martinson, Alex AU - Elam, Jeffrey AU - Pellin, Michael Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Energy KW - Films UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313112413?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Energy+Levels%2C+Electronic+Properties%2C+and+Rectification+in+Ultrathin+P-NiO+Films+Synthesized+by+Atomic+Layer+Deposition&rft.au=Thimsen%2C+Elijah%3BMartinson%2C+Alex%3BElam%2C+Jeffrey%3BPellin%2C+Michael&rft.aulast=Thimsen&rft.aufirst=Elijah&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Atomic Layer Deposition of the Quaternary Chalcogenide Cu2ZnSnS4 (CZTS) T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313112292; 6167939 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Thimsen, Elijah AU - Riha, Shannon AU - Martinson, Alex AU - Elam, Jeffrey AU - Pellin, Michael Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Quaternary KW - Paleo studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313112292?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Atomic+Layer+Deposition+of+the+Quaternary+Chalcogenide+Cu2ZnSnS4+%28CZTS%29&rft.au=Thimsen%2C+Elijah%3BRiha%2C+Shannon%3BMartinson%2C+Alex%3BElam%2C+Jeffrey%3BPellin%2C+Michael&rft.aulast=Thimsen&rft.aufirst=Elijah&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Nanomaterials Enabled Lithium Chemistry for Advanced Rechargeable Batteries T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313107265; 6165978 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Wang, Chao Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Nanotechnology KW - Lithium KW - Batteries KW - nanotechnology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313107265?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Nanomaterials+Enabled+Lithium+Chemistry+for+Advanced+Rechargeable+Batteries&rft.au=Wang%2C+Chao&rft.aulast=Wang&rft.aufirst=Chao&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Advanced Heterogeneous Catalysts From Organic Solution Synthesis T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313106511; 6167632 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Wang, Chao Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Catalysts UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313106511?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Advanced+Heterogeneous+Catalysts+From+Organic+Solution+Synthesis&rft.au=Wang%2C+Chao&rft.aulast=Wang&rft.aufirst=Chao&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Key Ingredients and Co-Products in Biofuel Life Cycle Analysis T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313106215; 6167306 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Dunn, Jennifer AU - Mueller, Steffen AU - Wang, Zhichao AU - Han, Jeongwoo AU - Wang, Michael Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Fuel technology KW - Life cycle KW - Biofuels UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313106215?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Key+Ingredients+and+Co-Products+in+Biofuel+Life+Cycle+Analysis&rft.au=Dunn%2C+Jennifer%3BMueller%2C+Steffen%3BWang%2C+Zhichao%3BHan%2C+Jeongwoo%3BWang%2C+Michael&rft.aulast=Dunn&rft.aufirst=Jennifer&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Protein Analogous Micelles: Versatile, Modular Nanoparticles T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313102125; 6167052 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Tirrell, Matthew Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - nanoparticles KW - Micelles UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313102125?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Protein+Analogous+Micelles%3A+Versatile%2C+Modular+Nanoparticles&rft.au=Tirrell%2C+Matthew&rft.aulast=Tirrell&rft.aufirst=Matthew&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Particle Size Effect On Electrocatalyst Stability T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313100950; 6169750 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Wang, Chao Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Particle size UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313100950?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Particle+Size+Effect+On+Electrocatalyst+Stability&rft.au=Wang%2C+Chao&rft.aulast=Wang&rft.aufirst=Chao&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Computational Investigation of Organic Molecule Assemblies On Cu(111) T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313098267; 6167111 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Rankin, Rees AU - Yitamben, Esmeralda AU - Iski, Erin AU - Smerdon, Joe AU - Guisinger, Nathan AU - Guest, Jeffrey AU - Greeley, Jeff Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Computer applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313098267?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Computational+Investigation+of+Organic+Molecule+Assemblies+On+Cu%28111%29&rft.au=Rankin%2C+Rees%3BYitamben%2C+Esmeralda%3BIski%2C+Erin%3BSmerdon%2C+Joe%3BGuisinger%2C+Nathan%3BGuest%2C+Jeffrey%3BGreeley%2C+Jeff&rft.aulast=Rankin&rft.aufirst=Rees&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Energy Storage in Redox-Active Organic Molecules T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313037100; 6170688 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Brushett, Fikile AU - Zhang, Lu AU - Vaughey, John AU - Jansen, Andrew Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Storage KW - Energy storage UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313037100?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Energy+Storage+in+Redox-Active+Organic+Molecules&rft.au=Brushett%2C+Fikile%3BZhang%2C+Lu%3BVaughey%2C+John%3BJansen%2C+Andrew&rft.aulast=Brushett&rft.aufirst=Fikile&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Development of Volcano Plots for Selected Reactions in Heterogeneous Catalysis and Electrocatalysis T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313033565; 6168905 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Rankin, Rees AU - Greeley, Jeff Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Volcanoes KW - Catalysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313033565?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Development+of+Volcano+Plots+for+Selected+Reactions+in+Heterogeneous+Catalysis+and+Electrocatalysis&rft.au=Rankin%2C+Rees%3BGreeley%2C+Jeff&rft.aulast=Rankin&rft.aufirst=Rees&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Polyelectrolytes in Multivalent Ionic Media: New Physics and New Materials T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313019937; 6168711 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Tirrell, Matthew Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Polyelectrolytes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313019937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Polyelectrolytes+in+Multivalent+Ionic+Media%3A+New+Physics+and+New+Materials&rft.au=Tirrell%2C+Matthew&rft.aulast=Tirrell&rft.aufirst=Matthew&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - The Challenge of Nucleic Acid-Surfactant Films for Transfection T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313013216; 6167642 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Perry, Sarah AU - Gajria, Surekha AU - Weinstein, J AU - Schaffer, David AU - Tirrell, Matthew Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Films KW - Transfection UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313013216?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=The+Challenge+of+Nucleic+Acid-Surfactant+Films+for+Transfection&rft.au=Perry%2C+Sarah%3BGajria%2C+Surekha%3BWeinstein%2C+J%3BSchaffer%2C+David%3BTirrell%2C+Matthew&rft.aulast=Perry&rft.aufirst=Sarah&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - An Assessment of Offshore Wind Turbine Visibility in the United Kingdom T2 - OCEANS 2012 MTS/IEEE AN - 1313055741; 6173660 JF - OCEANS 2012 MTS/IEEE AU - Sullivan, Robert AU - Cothren, Jackson AU - Winters, Snow AU - Cooper, Chad Y1 - 2012/10/14/ PY - 2012 DA - 2012 Oct 14 KW - Wind energy KW - Visibility KW - Turbines UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313055741?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=OCEANS+2012+MTS%2FIEEE&rft.atitle=An+Assessment+of+Offshore+Wind+Turbine+Visibility+in+the+United+Kingdom&rft.au=Sullivan%2C+Robert%3BCothren%2C+Jackson%3BWinters%2C+Snow%3BCooper%2C+Chad&rft.aulast=Sullivan&rft.aufirst=Robert&rft.date=2012-10-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=OCEANS+2012+MTS%2FIEEE&rft.issn=&rft_id=info:doi/ L2 - http://www.oceans12mtsieeehamptonroads.org/docs/conference-program.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Sodium insertion in carboxylate based materials and their application in 3.6 V full sodium cells AN - 1701087590; 17317909 AB - The sodium battery has the potential to be the next generation rechargeable system which utilizes cheaper and more abundant sodium material but affords nearly the same power as lithium batteries. One of the key barriers for the sodium battery is the lack of stable anode materials which can insert sodium ions reversibly at relatively low potential. This contribution reports the sodium insertion in a series of organic carboxylate based materials: (C sub(8)H sub(4)Na sub(2)O sub(4)), (C sub(8)H sub(6)O sub(4)), (C sub(8)H sub(5)NaO sub(4)), (C sub(8)Na sub(2)F sub(4)O sub(4)), (C sub(10)H sub(2)Na sub(4)O sub(8)), (C sub(14)H sub(4)O sub(6)) and (C sub(14)H sub(4)Na sub(4)O sub(8)) at low voltage (below 0.6 V vs.Na/Na super(+)). These organic anode materials can insert reversibly up to 2 Na per molecule with good cycleability. The Na insertion mechanism was proposed and 3.6 V full sodium batteries were made and cycled reversibly at room temperature and at 55 degree C. JF - Energy & Environmental Science AU - Abouimrane, Ali AU - Weng, Wei AU - Eltayeb, Hussameldin AU - Cui, Yanjie AU - Niklas, Jens AU - Poluektov, Oleg AU - Amine, Khalil AD - Chemical Sciences & Engineering Division; Argonne National Laboratory; 9700 South Cass Avenue, Argonne; Illinois 60439; USA; +1 63 0252 4176; +1 63 0252 3729 abouimrane@anl.gov Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 9632 EP - 9638 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 5 IS - 11 SN - 1754-5692, 1754-5692 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA) KW - Sodium KW - Inserts KW - Insertion KW - Electric batteries KW - Anodes KW - Battery KW - Carboxylates KW - Lithium batteries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1701087590?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environmental+Science&rft.atitle=Sodium+insertion+in+carboxylate+based+materials+and+their+application+in+3.6+V+full+sodium+cells&rft.au=Abouimrane%2C+Ali%3BWeng%2C+Wei%3BEltayeb%2C+Hussameldin%3BCui%2C+Yanjie%3BNiklas%2C+Jens%3BPoluektov%2C+Oleg%3BAmine%2C+Khalil&rft.aulast=Abouimrane&rft.aufirst=Ali&rft.date=2012-10-01&rft.volume=5&rft.issue=11&rft.spage=9632&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environmental+Science&rft.issn=17545692&rft_id=info:doi/10.1039%2Fc2ee22864e LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-12-01 N1 - Number of references - 35 N1 - Last updated - 2015-08-04 DO - http://dx.doi.org/10.1039/c2ee22864e ER - TY - JOUR T1 - Microfabricated magnetic structures for future medicine: from sensors to cell actuators AN - 1492626736; 18905114 AB - In this review, we discuss the prospective medical application of magnetic carriers microfabricated by top-down techniques. Physical methods allow the fabrication of a variety of magnetic structures with tightly controlled magnetic properties and geometry, which makes them very attractive for a cost-efficient mass-production in the fast growing field of nanomedicine. Stand-alone fabricated particles along with integrated devices combining lithographically defined magnetic structures and synthesized magnetic tags will be considered. Applications of microfabricated multifunctional magnetic structures for future medicinal purposes range from ultrasensitive in vitro diagnostic bioassays, DNA sequencing and microfluidic cell sorting to magnetomechanical actuation, cargo delivery, contrast enhancement and heating therapy. JF - Nanomedicine AU - Vitol, Elina A AU - Novosad, Valentyn AU - Rozhkova, Elena A AD - super(1)Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA, evitol@anl.gov Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 1611 EP - 1624 PB - Future Science Group (FSG), Unitec House, 2 Albert Place London N3 1QB United Kingdom VL - 7 IS - 10 SN - 1743-5889, 1743-5889 KW - Biotechnology and Bioengineering Abstracts KW - DNA sequencing KW - nanotechnology KW - W 30955:Biosensors UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492626736?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nanomedicine&rft.atitle=Microfabricated+magnetic+structures+for+future+medicine%3A+from+sensors+to+cell+actuators&rft.au=Vitol%2C+Elina+A%3BNovosad%2C+Valentyn%3BRozhkova%2C+Elena+A&rft.aulast=Vitol&rft.aufirst=Elina&rft.date=2012-10-01&rft.volume=7&rft.issue=10&rft.spage=1611&rft.isbn=&rft.btitle=&rft.title=Nanomedicine&rft.issn=17435889&rft_id=info:doi/10.2217%2Fnnm.12.133 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-12-01 N1 - Number of references - 1 N1 - Last updated - 2014-02-11 N1 - SubjectsTermNotLitGenreText - nanotechnology DO - http://dx.doi.org/10.2217/nnm.12.133 ER - TY - JOUR T1 - A watchful guardian AN - 1221885256; 17371221 AB - Radio frequency identification (RFID) is a technology that can augment the existing safeguards and security measures at radiological facilities, and further enhance the protection of both materials and personnel [1-5]. Although commercial applications are already widespread, the use of this technology for managing nuclear materials is only in its infancy. JF - Nuclear Engineering International AU - Anderson, J AU - Lee, H AU - De Lurgio, P AU - Kearney, C M AU - Craig, B AU - Soos, I H AU - Tsai, H AU - Liu, Y AU - Shuler, J AD - Argonne National Laboratory, Argonne, IL 60439, USA Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 38 EP - 40 PB - Wilmington Publishing, Wilmington House Maidstone Rd., Foots Cray Sidcup Kent DA14 5HZ United Kingdom VL - 57 IS - 699 SN - 0029-5507, 0029-5507 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE); ANTE: Abstracts in New Technologies and Engineering (AN) KW - Nuclear engineering KW - Personnel KW - Radio frequency identification KW - Security KW - Technology utilization KW - Yes:(AN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1221885256?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Engineering+International&rft.atitle=A+watchful+guardian&rft.au=Anderson%2C+J%3BLee%2C+H%3BDe+Lurgio%2C+P%3BKearney%2C+C+M%3BCraig%2C+B%3BSoos%2C+I+H%3BTsai%2C+H%3BLiu%2C+Y%3BShuler%2C+J&rft.aulast=Anderson&rft.aufirst=J&rft.date=2012-10-01&rft.volume=57&rft.issue=699&rft.spage=38&rft.isbn=&rft.btitle=&rft.title=Nuclear+Engineering+International&rft.issn=00295507&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-12-01 N1 - Last updated - 2012-12-05 ER - TY - JOUR T1 - Structural and functional analysis of the transcriptional regulator Rv3066 of Mycobacterium tuberculosis AN - 1125232223; 17282343 AB - The Mmr multidrug efflux pump recognizes and actively extrudes a broad range of antimicrobial agents, and promotes the intrinsic resistance to these antimicrobials in Mycobacterium tuberculosis. The expression of Mmr is controlled by the TetR-like transcriptional regulator Rv3066, whose open reading frame is located downstream of the mmr operon. To understand the structural basis of Rv3066 regulation, we have determined the crystal structures of Rv3066, both in the absence and presence of bound ethidium, revealing an asymmetric homodimeric two-domain molecule with an entirely helical architecture. The structures underscore the flexibility and plasticity of the regulator essential for multidrug recognition. Comparison of the apo-Rv3066 and Rv3066-ethidium crystal structures suggests that the conformational changes leading to drug-mediated derepression is primarily due to a rigid body rotational motion within the dimer interface of the regulator. The Rv3066 regulator creates a multidrug-binding pocket, which contains five aromatic residues. The bound ethidium is found buried within the multidrug-binding site, where extensive aromatic stacking interactions seemingly govern the binding. In vitro studies reveal that the dimeric Rv3066 regulator binds to a 14-bp palindromic inverted repeat sequence in the nanomolar range. These findings provide new insight into the mechanisms of ligand binding and Rv3066 regulation. JF - Nucleic Acids Research AU - Bolla, Jani Reddy AU - Do, Sylvia V AU - Long, Feng AU - Dai, Lei AU - Su, Chih-Chia AU - Lei, Hsiang-Ting AU - Chen, Xiao AU - Gerkey, Jillian E AU - Murphy, Daniel C AU - Rajashankar, Kanagalaghatta R AU - Zhang, Qijing AU - Yu, Edward W AD - super(1)Department of Chemistry, super(2)Bioinformatics and Computational Biology Interdepartmental Graduate Program, super(3)Department of Veterinary Microbiology, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, super(4)NE-CAT and Department of Chemistry and Chemical Biology, Cornell University, Argonne National Laboratory, Argonne, IL 60439 and super(5)Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA, ewyu@iastate.edu Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 9340 EP - 9355 PB - Oxford University Press, Great Clarendon Street Oxford OX2 6DP United Kingdom VL - 40 IS - 18 SN - 0305-1048, 0305-1048 KW - Genetics Abstracts; Microbiology Abstracts B: Bacteriology; Biochemistry Abstracts 2: Nucleic Acids KW - Antimicrobial agents KW - Aromatics KW - Crystal structure KW - Derepression KW - Inverted repeat KW - Open reading frames KW - Operons KW - Stacking KW - Structure-function relationships KW - Transcription KW - Mycobacterium tuberculosis KW - J 02310:Genetics & Taxonomy KW - N 14830:RNA KW - G 07770:Bacteria UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1125232223?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nucleic+Acids+Research&rft.atitle=Structural+and+functional+analysis+of+the+transcriptional+regulator+Rv3066+of+Mycobacterium+tuberculosis&rft.au=Bolla%2C+Jani+Reddy%3BDo%2C+Sylvia+V%3BLong%2C+Feng%3BDai%2C+Lei%3BSu%2C+Chih-Chia%3BLei%2C+Hsiang-Ting%3BChen%2C+Xiao%3BGerkey%2C+Jillian+E%3BMurphy%2C+Daniel+C%3BRajashankar%2C+Kanagalaghatta+R%3BZhang%2C+Qijing%3BYu%2C+Edward+W&rft.aulast=Bolla&rft.aufirst=Jani&rft.date=2012-10-01&rft.volume=40&rft.issue=18&rft.spage=9340&rft.isbn=&rft.btitle=&rft.title=Nucleic+Acids+Research&rft.issn=03051048&rft_id=info:doi/10.1093%2Fnar%2Fgks677 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-10-01 N1 - Last updated - 2012-12-03 N1 - SubjectsTermNotLitGenreText - Stacking; Structure-function relationships; Derepression; Crystal structure; Transcription; Operons; Inverted repeat; Open reading frames; Aromatics; Antimicrobial agents; Mycobacterium tuberculosis DO - http://dx.doi.org/10.1093/nar/gks677 ER - TY - JOUR T1 - A general moment NRIXS approach to the determination of equilibrium Fe isotopic fractionation factors; application to goethite and jarosite AN - 1124740853; 2012-095621 AB - The equilibrium Fe isotopic fractionation factors of goethite and jarosite have considerable importance for interpreting Fe isotope variations in low temperature aqueous systems on Earth and possibly Mars in the context of future sample return missions. We measured the beta -factors of goethite FeO(OH), potassium-jarosite KFe (sub 3) (SO (sub 4) ) (sub 2) (OH) (sub 6) , and hydronium-jarosite (H (sub 3) O)Fe (sub 3) (SO (sub 4) ) (sub 2) (OH) (sub 6) , by Nuclear Resonant Inelastic X-ray Scattering (NRIXS, also known as Nuclear Resonance Vibrational Spectroscopy - NRVS or Nuclear Inelastic Scattering - NIS) at the Advanced Photon Source. These measurements were made on synthetic minerals enriched in (super 57) Fe. A new method (i.e., the general moment approach) is presented to calculate beta -factors from the moments of the NRIXS spectrum S(E). The first term in the moment expansion controls iron isotopic fractionation at high temperature and corresponds to the mean force constant of the iron bonds, a quantity that is readily measured and often reported in NRIXS studies. The mean force constants of goethite, potassium-jarosite, and hydronium-jarosite are 314+ or -14, 264+ or -12, and 310+ or -14 N/m, respectively (uncertainties include statistical and systematic errors). The general moment approach gives (super 56) Fe/ (super 54) Fe beta -factors of 9.7, 8.3, and 9.5 ppm at 22 degrees C for these minerals. The beta -factor of goethite measured by NRIXS is larger than that estimated by combining results from laboratory exchange experiments and calculations based on electronic structure theory. Similar issues have been identified previously for other pairs of mineral-aqueous species, which could reflect inadequacies of approaches based on electronic structure theory to calculate absolute beta -factors (differences in beta -factors between aqueous species may be more accurate) or failure of laboratory experiments to measure mineral-fluid equilibrium isotopic fractionation at low temperature. We apply the force constant approach to published NRIXS data and report 1000Xlnbeta for important Fe-bearing phases of geological and biochemical relevance such as myoglobin, cytochrome f, pyroxene, metal, troilite, chalcopyrite, hematite, and magnetite. Abstract Copyright (2012) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Dauphas, N AU - Roskosz, M AU - Alp, E E AU - Golden, D C AU - Sio, C K AU - Tissot, F L H AU - Hu, M Y AU - Zhao, J AU - Gao, L AU - Morris, R V Y1 - 2012/10/01/ PY - 2012 DA - 2012 Oct 01 SP - 254 EP - 275 PB - Elsevier, New York, NY VL - 94 SN - 0016-7037, 0016-7037 KW - methods KW - nuclear resonant inelastic X-ray scattering KW - isotope fractionation KW - chemical analysis KW - goethite KW - sulfates KW - isotopes KW - isotope ratios KW - stable isotopes KW - iron KW - jarosite KW - phase equilibria KW - metals KW - mathematical methods KW - oxides KW - spectra KW - Fe-56/Fe-54 KW - crystal chemistry KW - chemical composition KW - 02D:Isotope geochemistry KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1124740853?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=A+general+moment+NRIXS+approach+to+the+determination+of+equilibrium+Fe+isotopic+fractionation+factors%3B+application+to+goethite+and+jarosite&rft.au=Dauphas%2C+N%3BRoskosz%2C+M%3BAlp%2C+E+E%3BGolden%2C+D+C%3BSio%2C+C+K%3BTissot%2C+F+L+H%3BHu%2C+M+Y%3BZhao%2C+J%3BGao%2C+L%3BMorris%2C+R+V&rft.aulast=Dauphas&rft.aufirst=N&rft.date=2012-10-01&rft.volume=94&rft.issue=&rft.spage=254&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2012.06.013 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 68 N1 - PubXState - NY N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-11-01 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - chemical analysis; chemical composition; crystal chemistry; Fe-56/Fe-54; goethite; iron; isotope fractionation; isotope ratios; isotopes; jarosite; mathematical methods; metals; methods; nuclear resonant inelastic X-ray scattering; oxides; phase equilibria; spectra; stable isotopes; sulfates DO - http://dx.doi.org/10.1016/j.gca.2012.06.013 ER - TY - JOUR T1 - Morphological and crystalline evolution of nanostructured MnO2 and its application in lithium--air batteries. AN - 1080612613; 22866870 AB - Single-crystal α-MnO(2) nanotubes have been successfully synthesized by microwave-assisted hydrothermal of potassium permanganate in the presence of hydrochloric acid. The growth mechanism including the morphological and crystalline evolution has been carefully studied with time-dependent X-ray diffraction, electron microscopy, and controlled synthesis. The as-synthesized MnO(2) nanostructures are incorporated in air cathodes of lithium--air batteries as electrocatalysts for the oxygen reduction and evolution reactions. The characterization reveals that the electrodes made of single-crystalline α-MnO(2) nanotubes exhibit much better stability than those made of α-MnO(2) nanowires and δ-MnO(2) nanosheet-based microflowers in both charge and discharge processes. JF - ACS nano AU - Truong, Tu T AU - Liu, Yuzi AU - Ren, Yang AU - Trahey, Lynn AU - Sun, Yugang AD - Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States. Y1 - 2012/09/25/ PY - 2012 DA - 2012 Sep 25 SP - 8067 EP - 8077 VL - 6 IS - 9 KW - Manganese Compounds KW - 0 KW - Oxides KW - manganese oxide KW - 64J2OA7MH3 KW - Lithium KW - 9FN79X2M3F KW - Index Medicus KW - Equipment Design KW - Equipment Failure Analysis KW - Particle Size KW - Air KW - Lithium -- isolation & purification KW - Nanostructures -- ultrastructure KW - Nanostructures -- chemistry KW - Electric Power Supplies KW - Manganese Compounds -- chemistry KW - Lithium -- chemistry KW - Crystallization -- methods KW - Oxides -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1080612613?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Morphological+and+crystalline+evolution+of+nanostructured+MnO2+and+its+application+in+lithium--air+batteries.&rft.au=Truong%2C+Tu+T%3BLiu%2C+Yuzi%3BRen%2C+Yang%3BTrahey%2C+Lynn%3BSun%2C+Yugang&rft.aulast=Truong&rft.aufirst=Tu&rft.date=2012-09-25&rft.volume=6&rft.issue=9&rft.spage=8067&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-02-08 N1 - Date created - 2012-09-25 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 ER - TY - JOUR T1 - First principles simulations of the electrochemical lithiation and delithiation of faceted crystalline silicon. AN - 1038229116; 22817384 AB - Silicon is of significant interest as a next-generation anode material for lithium-ion batteries due to its extremely high capacity. The reaction of lithium with crystalline silicon is known to present a rich range of phenomena, including electrochemical solid state amorphization, crystallization at full lithiation of a Li(15)Si(4) phase, hysteresis in the first lithiation-delithiation cycle, and highly anisotropic lithiation in crystalline samples. Very little is known about these processes at an atomistic level, however. To provide fundamental insights into these issues, we develop and apply a first principles, history-dependent, lithium insertion and removal algorithm to model the process of lithiation and subsequent delithiation of crystalline Si. The simulations give a realistic atomistic picture of lithiation demonstrating, for the first time, the amorphization process and hinting at the formation of the Li(15)Si(4) phase. Voltages obtained from the simulations show that lithiation of the (110) surface is thermodynamically more favorable than lithiation of the (100) or (111) surfaces, providing an explanation for the drastic lithiation anisotropy seen in experiments on Si micro- and nanostructures. Analysis of the delithiation and relithiation processes also provides insights into the underlying physics of the lithiation-delithiation hysteresis, thus providing firm conceptual foundations for future design of improved Si-based anodes for Li ion battery applications. JF - Journal of the American Chemical Society AU - Chan, Maria K Y AU - Wolverton, C AU - Greeley, Jeffrey P AD - Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA. mchan@anl.gov Y1 - 2012/09/05/ PY - 2012 DA - 2012 Sep 05 SP - 14362 EP - 14374 VL - 134 IS - 35 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1038229116?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+American+Chemical+Society&rft.atitle=First+principles+simulations+of+the+electrochemical+lithiation+and+delithiation+of+faceted+crystalline+silicon.&rft.au=Chan%2C+Maria+K+Y%3BWolverton%2C+C%3BGreeley%2C+Jeffrey+P&rft.aulast=Chan&rft.aufirst=Maria+K&rft.date=2012-09-05&rft.volume=134&rft.issue=35&rft.spage=14362&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+American+Chemical+Society&rft.issn=1520-5126&rft_id=info:doi/10.1021%2Fja301766z LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-01-18 N1 - Date created - 2012-09-05 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1021/ja301766z ER - TY - JOUR T1 - Life cycle analysis of geothermal power generation with supercritical carbon dioxide AN - 1730045451; PQ0001812605 AB - Life cycle analysis methods were employed to model the greenhouse gas emissions and fossil energy consumption associated with geothermal power production when supercritical carbon dioxide (scCO sub(2)) is used instead of saline geofluids to recover heat from below ground. Since a significant amount of scCO sub(2) is sequestered below ground in the process, a constant supply is required. We therefore combined the scCO sub(2) geothermal power plant with an upstream coal power plant that captured a portion of its CO sub(2) emissions, compressed it to scCO sub(2), and transported the scCO sub(2) by pipeline to the geothermal power plant. Emissions and energy consumption from all operations spanning coal mining and plant construction through power production were considered, including increases in coal use to meet steam demand for the carbon capture. The results indicated that the electricity produced by the geothermal plant more than balanced the increase in energy use resulting from carbon capture at the coal power plant. The effective heat rate (BTU coal per total kW?h of electricity generated, coal plus geothermal) was comparable to that of traditional coal, but the ratio of life cycle emissions from the combined system to that of traditional coal was 15% when 90% carbon capture efficiency was assumed and when leakage from the surface was neglected. Contributions from surface leakage were estimated with a simple model for several hypothetical surface leakage rates. JF - Environmental Research Letters AU - Frank, Edward D AU - Sullivan, gov John L AU - Wang, Michael Q AD - Center for Transportation Research, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA efrank@anl Y1 - 2012/09// PY - 2012 DA - September 2012 SP - 1 EP - 10 PB - IOP Publishing, The Public Ledger Building, Suite 929 Philadelphia PA 19106 United States VL - 7 IS - 3 SN - 1748-9326, 1748-9326 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - geothermal power KW - supercritical carbon dioxide KW - life cycle analysis KW - greenhouse gas emissions KW - carbon sequestration KW - Coal mines KW - Leakage KW - Grounds KW - Electric power generation KW - Carbon capture and storage KW - Geothermal energy KW - Coal KW - Carbon dioxide UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1730045451?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Research+Letters&rft.atitle=Life+cycle+analysis+of+geothermal+power+generation+with+supercritical+carbon+dioxide&rft.au=Frank%2C+Edward+D%3BSullivan%2C+gov+John+L%3BWang%2C+Michael+Q&rft.aulast=Frank&rft.aufirst=Edward&rft.date=2012-09-01&rft.volume=7&rft.issue=3&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Environmental+Research+Letters&rft.issn=17489326&rft_id=info:doi/10.1088%2F1748-9326%2F7%2F3%2F034030 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-11-01 N1 - Last updated - 2016-08-08 DO - http://dx.doi.org/10.1088/1748-9326/7/3/034030 ER - TY - JOUR T1 - The active bacterial community in a pristine confined aquifer AN - 1566849475; 20688655 AB - This study of the active bacteria residing in a pristine confined aquifer provides unexpected insights into the ecology of iron-reducing and sulfate-reducing bacteria in the subsurface. At 18 wells, we trapped the microbes that attached to aquifer sediment and used molecular techniques to examine the bacterial populations. We used multivariate statistics to compare the composition of bacterial communities among the wells with respect to the chemistry of the groundwater. We found groundwater at each well was considerably richer in ferrous iron than sulfide, indicating iron-reducing bacteria should, by established criteria, dominate the sulfate reducers. Our results show, however, that areas where groundwater contains more than a negligible amount of sulfate (>0.03 mM), populations related to sulfate reducers of the generaDesulfobacter and Desulfobulbus were of nearly equal abundance with putative iron reducers related to Geobacter, Geothrix, and Desulfuromonas. Whereas sulfate is a key discriminant of bacterial community structure, we observed no statistical relationship between the distribution of bacterial populations in this aquifer and the concentration of either ferrous iron or dissolved sulfide. These results call into question the validity of using the relative concentration of these two ions to predict the nature of bacterial activity in an aquifer. Sulfate reducers and iron reducers do not appear to be segregated into discrete zones in the aquifer, as would be predicted by the theory of competitive exclusion. Instead, we find the two groups coexist in the subsurface in what we suggest is a mutualistic relationship. Key Points * The amount of sulfate in groundwater controls bacterial community structure * Iron reducers and sulfate reducers co-exist in this aquifer * Ferrous iron and sulfide do not correspond to bacterial community structure JF - Water Resources Research AU - Flynn, Theodore M AU - Sanford, Robert A AU - Santo Domingo, Jorge W AU - Ashbolt, Nicholas J AU - Levine, Audrey D AU - Bethke, Craig M AD - Department of Geology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA., tflynn@anl.gov Y1 - 2012/09// PY - 2012 DA - Sep 2012 SP - [np] PB - American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 United States VL - 48 IS - 9 SN - 0043-1397, 0043-1397 KW - Microbiology Abstracts B: Bacteriology; Microbiology Abstracts A: Industrial & Applied Microbiology; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts; Aqualine Abstracts KW - geomicrobiology KW - iron reduction KW - sulfate reduction KW - Desulfobulbus KW - Sulfates KW - iron-reducing bacteria KW - Aquifers KW - Aquifer KW - Statistics KW - Geobacter KW - Ecosystems KW - Abundance KW - Water resources KW - Sulphides KW - Interspecific relationships KW - Multivariate analysis KW - Ground water KW - Desulfuromonas KW - Bacteria KW - Ions KW - Sulfate-reducing bacteria KW - Sulfides KW - Confined Aquifers KW - Sediments KW - Sulfate KW - Sulfide KW - Community composition KW - Community structure KW - Wells KW - Population structure KW - Groundwater KW - Iron KW - Q5 08503:Characteristics, behavior and fate KW - A 01450:Environmental Pollution & Waste Treatment KW - SW 6010:Structures KW - AQ 00005:Underground Services and Water Use KW - J 02450:Ecology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566849475?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=The+active+bacterial+community+in+a+pristine+confined+aquifer&rft.au=Flynn%2C+Theodore+M%3BSanford%2C+Robert+A%3BSanto+Domingo%2C+Jorge+W%3BAshbolt%2C+Nicholas+J%3BLevine%2C+Audrey+D%3BBethke%2C+Craig+M&rft.aulast=Flynn&rft.aufirst=Theodore&rft.date=2012-09-01&rft.volume=48&rft.issue=9&rft.spage=%5Bnp%5D&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2011WR011568 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Last updated - 2015-01-21 N1 - SubjectsTermNotLitGenreText - Sulphides; Aquifer; Community composition; Interspecific relationships; Water resources; Population structure; Aquifers; iron-reducing bacteria; Ions; Sulfate-reducing bacteria; Statistics; Abundance; Sediments; Sulfate; Sulfide; Multivariate analysis; Community structure; Ground water; Iron; Sulfates; Bacteria; Ecosystems; Wells; Confined Aquifers; Sulfides; Groundwater; Desulfobulbus; Desulfuromonas; Geobacter DO - http://dx.doi.org/10.1029/2011WR011568 ER - TY - JOUR T1 - Tc(VII) reduction kinetics by titanomagnetite (Fe (sub 3-x) Ti (sub x) O (sub 4) ) nanoparticles AN - 1282822760; 2013-013404 AB - Technetium contamination remains a major environmental problem at nuclear reprocessing sites, such as at the Hanford nuclear reservation, Washington, USA. Here we investigate the heterogeneous reduction of the highly soluble pertechnetate anion [Tc(VII)O (sub 4) (super -) ] to sparingly soluble Tc(IV)-bearing solids by a novel and well-characterized set of mixed-valent titanium-doped magnetite nanoparticles, structurally and chemically analogous to titanomagnetites naturally present in Hanford sediments. Titanomagnetite (Fe (sub 3-x) Ti (sub x) O (sub 4) ) nanoparticles (10-12 nm) with varying Ti content (0= or =2.0X10 (super -3) mol/L in presence of the surface, although solubility studies suggest that Th is soluble under these solution conditions. JF - Geochimica et Cosmochimica Acta AU - Schmidt, M AU - Lee, S S AU - Wilson, R E AU - Soderholm, L AU - Fenter, P Y1 - 2012/07/01/ PY - 2012 DA - 2012 Jul 01 SP - 66 EP - 76 PB - Elsevier, New York, NY VL - 88 SN - 0016-7037, 0016-7037 KW - silicates KW - sorption KW - experimental studies KW - muscovite KW - aqueous solutions KW - water-rock interaction KW - mica group KW - metals KW - mathematical methods KW - EXAFS data KW - thorium KW - sheet silicates KW - valency KW - crystal chemistry KW - chemical composition KW - geochemistry KW - actinides KW - 01B:Mineralogy of silicates KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1030492825?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Sorption+of+tetravalent+thorium+on+muscovite&rft.au=Schmidt%2C+M%3BLee%2C+S+S%3BWilson%2C+R+E%3BSoderholm%2C+L%3BFenter%2C+P&rft.aulast=Schmidt&rft.aufirst=M&rft.date=2012-07-01&rft.volume=88&rft.issue=&rft.spage=66&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2012.04.001 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 86 N1 - PubXState - NY N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-08-02 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - actinides; aqueous solutions; chemical composition; crystal chemistry; EXAFS data; experimental studies; geochemistry; mathematical methods; metals; mica group; muscovite; sheet silicates; silicates; sorption; thorium; valency; water-rock interaction DO - http://dx.doi.org/10.1016/j.gca.2012.04.001 ER - TY - JOUR T1 - Modeling microbial community structure and functional diversity across time and space AN - 1028031573; 16854335 AB - Microbial communities exhibit exquisitely complex structure. Many aspects of this complexity, from the number of species to the total number of interactions, are currently very difficult to examine directly. However, extraordinary efforts are being made to make these systems accessible to scientific investigation. While recent advances in high-throughput sequencing technologies have improved accessibility to the taxonomic and functional diversity of complex communities, monitoring the dynamics of these systems over time and space - using appropriate experimental design - is still expensive. Fortunately, modeling can be used as a lens to focus low-resolution observations of community dynamics to enable mathematical abstractions of functional and taxonomic dynamics across space and time. Here, we review the approaches for modeling bacterial diversity at both the very large and the very small scales at which microbial systems interact with their environments. We show that modeling can help to connect biogeochemical processes to specific microbial metabolic pathways. JF - FEMS Microbiology Letters AU - Larsen, Peter E AU - Gibbons, Sean M AU - Gilbert, Jack A AD - Argonne National Laboratory Y1 - 2012/07// PY - 2012 DA - Jul 2012 SP - 91 EP - 98 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 332 IS - 2 SN - 0378-1097, 0378-1097 KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Environment Abstracts KW - Biogeochemistry KW - Community structure KW - Reviews KW - Metabolic pathways KW - Taxonomy KW - Microbial activity KW - Technology KW - A 01450:Environmental Pollution & Waste Treatment KW - ENA 21:Wildlife UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1028031573?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologya&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=FEMS+Microbiology+Letters&rft.atitle=Modeling+microbial+community+structure+and+functional+diversity+across+time+and+space&rft.au=Larsen%2C+Peter+E%3BGibbons%2C+Sean+M%3BGilbert%2C+Jack+A&rft.aulast=Larsen&rft.aufirst=Peter&rft.date=2012-07-01&rft.volume=332&rft.issue=2&rft.spage=91&rft.isbn=&rft.btitle=&rft.title=FEMS+Microbiology+Letters&rft.issn=03781097&rft_id=info:doi/10.1111%2Fj.1574-6968.2012.02588.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-07-01 N1 - Last updated - 2013-07-15 N1 - SubjectsTermNotLitGenreText - Community structure; Reviews; Metabolic pathways; Biogeochemistry; Microbial activity; Taxonomy; Technology DO - http://dx.doi.org/10.1111/j.1574-6968.2012.02588.x ER - TY - JOUR T1 - Panguite, (Ti (super 4+) ,Sc,Al,Mg,Zr,Ca) (sub 1.8) O (sub 3) , a new ultra-refractory titania mineral from the Allende Meteorite; synchrotron micro-diffraction and EBSD AN - 1026861301; 2012-067616 AB - Panguite (IMA 2010-057), (Ti (super 4+) ,Sc,Al,Mg,Zr,Ca) (sub 1.8) O (sub 3) , is a new titania, occurring as fine-grained crystals with Ti-rich davisite in an ultra-refractory inclusion within an amoeboid olivine inclusion from the Allende CV3 carbonaceous chondrite. The phase was characterized by SEM, EBSD, synchrotron micro-diffraction, micro-Raman spectroscopy, and EPMA. The mean chemical composition of the type panguite is (wt%) TiO (sub 2) 47.97, ZrO (sub 2) 14.61, Sc (sub 2) O (sub 3) 10.67, Al (sub 2) O (sub 3) 7.58, MgO 5.54, Y (sub 2) O (sub 3) 5.38, CaO 3.34, SiO (sub 2) 1.89, FeO 1.81, V (sub 2) O (sub 3) 0.95, Cr (sub 2) O (sub 3) 0.54, HfO (sub 2) 0.28, sum 100.56 with a corresponding empirical formula calculated on the basis of 3 O atoms of [(Ti (sub 0.79) Zr (sub 0.16) Si (sub 0.04) ) (super 4+) (sub Sigma 0.99) (Sc (sub 0.20) Al (sub 0.20) Y (sub 0.06) V (sub 0.02) Cr (sub 0.01) ) (super 3+) (sub Sigma 0.49) (Mg (sub 0.18) Ca (sub 0.08) Fe (sub 0.03) ) (super 2+) (sub Sigma 0.29) ] (sub Sigma 1.77) O (sub 3) . Synchrotron micro-Laue diffraction (i.e., an energy scan by a high-flux X-ray monochromatic beam and white beam diffraction) on one type domain at sub-micrometer resolution revealed that panguite is an orthorhombic mineral in space group PBCA: The structure is a subgroup of the Ia3 bixbyite-type. The cell parameters are a=9.781(1), b=9.778(2), and c=9.815(1) Aa, yielding V=938.7(1) Aa (super 3) , Z=16, and a calculated density of 3.746 g/cm (super 3) . Panguite is not only a new mineral, but also a new titania material, likely formed by condensation. It is one of the oldest minerals in the solar system. JF - American Mineralogist AU - Ma, Chi AU - Tschauner, Oliver AU - Beckett, John R AU - Rossman, George R AU - Liu, Wenjun Y1 - 2012/07// PY - 2012 DA - July 2012 SP - 1219 EP - 1225 PB - Mineralogical Society of America, Washington, DC VL - 97 IS - 7 SN - 0003-004X, 0003-004X KW - silicates KW - calcium KW - magnesium KW - panguite KW - stony meteorites KW - X-ray diffraction data KW - refractory materials KW - zirconium KW - olivine group KW - crystal structure KW - CV chondrites KW - davisite KW - electron probe data KW - Allende Meteorite KW - synchrotron radiation KW - meteorites KW - aluminum KW - olivine KW - inclusions KW - orthosilicates KW - oxides KW - spectra KW - rare earths KW - chondrites KW - chemical composition KW - new minerals KW - solar system KW - cell dimensions KW - alkaline earth metals KW - carbonaceous chondrites KW - nesosilicates KW - mineral inclusions KW - titanium oxides KW - Raman spectra KW - metals KW - scandium KW - lattice parameters KW - formula KW - 05B:Petrology of meteorites and tektites KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1026861301?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Mineralogist&rft.atitle=Panguite%2C+%28Ti+%28super+4%2B%29+%2CSc%2CAl%2CMg%2CZr%2CCa%29+%28sub+1.8%29+O+%28sub+3%29+%2C+a+new+ultra-refractory+titania+mineral+from+the+Allende+Meteorite%3B+synchrotron+micro-diffraction+and+EBSD&rft.au=Ma%2C+Chi%3BTschauner%2C+Oliver%3BBeckett%2C+John+R%3BRossman%2C+George+R%3BLiu%2C+Wenjun&rft.aulast=Ma&rft.aufirst=Chi&rft.date=2012-07-01&rft.volume=97&rft.issue=7&rft.spage=1219&rft.isbn=&rft.btitle=&rft.title=American+Mineralogist&rft.issn=0003004X&rft_id=info:doi/10.2138%2Fam.2012.4027 L2 - http://ammin.geoscienceworld.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2012-01-01 N1 - Number of references - 49 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2012-07-19 N1 - CODEN - AMMIAY N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Allende Meteorite; aluminum; calcium; carbonaceous chondrites; cell dimensions; chemical composition; chondrites; crystal structure; CV chondrites; davisite; electron probe data; formula; inclusions; lattice parameters; magnesium; metals; meteorites; mineral inclusions; nesosilicates; new minerals; olivine; olivine group; orthosilicates; oxides; panguite; Raman spectra; rare earths; refractory materials; scandium; silicates; solar system; spectra; stony meteorites; synchrotron radiation; titanium oxides; X-ray diffraction data; zirconium DO - http://dx.doi.org/10.2138/am.2012.4027 ER - TY - JOUR T1 - The dedicated high-resolution grazing-incidence X-ray scattering beamline 8-ID-E at the Advanced Photon Source. AN - 1021452231; 22713900 AB - As an increasingly important structural-characterization technique, grazing-incidence X-ray scattering (GIXS) has found wide applications for in situ and real-time studies of nanostructures and nanocomposites at surfaces and interfaces. A dedicated beamline has been designed, constructed and optimized at beamline 8-ID-E at the Advanced Photon Source for high-resolution and coherent GIXS experiments. The effectiveness and applicability of the beamline and the scattering techniques have been demonstrated by a host of experiments including reflectivity, grazing-incidence static and kinetic scattering, and coherent surface X-ray photon correlation spectroscopy. The applicable systems that can be studied at 8-ID-E include liquid surfaces and nanostructured thin films. JF - Journal of synchrotron radiation AU - Jiang, Zhang AU - Li, Xuefa AU - Strzalka, Joseph AU - Sprung, Michael AU - Sun, Tao AU - Sandy, Alec R AU - Narayanan, Suresh AU - Lee, Dong Ryeol AU - Wang, Jin AD - X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA. Y1 - 2012/07// PY - 2012 DA - July 2012 SP - 627 EP - 636 VL - 19 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1021452231?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+synchrotron+radiation&rft.atitle=The+dedicated+high-resolution+grazing-incidence+X-ray+scattering+beamline+8-ID-E+at+the+Advanced+Photon+Source.&rft.au=Jiang%2C+Zhang%3BLi%2C+Xuefa%3BStrzalka%2C+Joseph%3BSprung%2C+Michael%3BSun%2C+Tao%3BSandy%2C+Alec+R%3BNarayanan%2C+Suresh%3BLee%2C+Dong+Ryeol%3BWang%2C+Jin&rft.aulast=Jiang&rft.aufirst=Zhang&rft.date=2012-07-01&rft.volume=19&rft.issue=&rft.spage=627&rft.isbn=&rft.btitle=&rft.title=Journal+of+synchrotron+radiation&rft.issn=1600-5775&rft_id=info:doi/10.1107%2FS0909049512022017 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2012-10-18 N1 - Date created - 2012-06-20 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1107/S0909049512022017 ER - TY - JOUR T1 - Sound velocities of Fe and Fe-Si alloy in the Earth's core AN - 1469622141; 2013-097601 AB - Compressional wave velocity-density (V (sub P) - rho ) relations of candidate Fe alloys at relevant pressure-temperature conditions of the Earth's core are critically needed to evaluate the composition, seismic signatures, and geodynamics of the planet's remotest region. Specifically, comparison between seismic V (sub P) - rho profiles of the core and candidate Fe alloys provides first-order information on the amount and type of potential light elements-including H, C, O, Si, and/or S-needed to compensate the density deficit of the core. To address this issue, here we have surveyed and analyzed the literature results in conjunction with newly measured V (sub P) - rho results of hexagonal closest-packed (hcp) Fe and hcp-Fe (sub 0.85) Si (sub 0.15) alloy using in situ high-energy resolution inelastic X-ray scattering and X-ray diffraction. The nature of the Fe-Si alloy where Si is readily soluble in Fe represents an ideal solid-solution case to better understand the light-element alloying effects. Our results show that high temperature significantly decreases the V (sub P) of hcp-Fe at high pressures, and the Fe-Si alloy exhibits similar high-pressure V (sub P) - rho behavior to hcp-Fe via a constant density offset. These V (sub P) - rho data at a given temperature can be better described by an empirical power-law function with a concave behavior at higher densities than with a linear approximation. Our new datasets, together with literature results, allow us to build new V (sub P) - rho models of Fe alloys in order to determine the chemical composition of the core. Our models show that the V (sub P) - rho profile of Fe with 8 wt% Si at 6,000 K matches well with the Preliminary Reference Earth Model of the inner core. JF - Proceedings of the National Academy of Sciences of the United States of America AU - Mao, Zhu AU - Lin, Jung-Fu AU - Liu, Jin AU - Alatas, Ahmet AU - Gao, Lili AU - Zhao, Jiyong AU - Mao, Ho-Kwang Y1 - 2012/06/26/ PY - 2012 DA - 2012 Jun 26 SP - 10239 EP - 10244 PB - National Academy of Sciences, Washington, DC VL - 109 IS - 26 SN - 0027-8424, 0027-8424 KW - P-waves KW - body waves KW - pressure KW - X-ray diffraction data KW - electron diffraction data KW - elastic waves KW - silicon KW - high pressure KW - iron KW - temperature KW - high-energy resolution inelastic X-ray scattering KW - metals KW - velocity structure KW - polycrystalline materials KW - core KW - alloys KW - seismic waves KW - anvil cells KW - high temperature KW - acoustical waves KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469622141?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.atitle=Sound+velocities+of+Fe+and+Fe-Si+alloy+in+the+Earth%27s+core&rft.au=Mao%2C+Zhu%3BLin%2C+Jung-Fu%3BLiu%2C+Jin%3BAlatas%2C+Ahmet%3BGao%2C+Lili%3BZhao%2C+Jiyong%3BMao%2C+Ho-Kwang&rft.aulast=Mao&rft.aufirst=Zhu&rft.date=2012-06-26&rft.volume=109&rft.issue=26&rft.spage=10239&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+National+Academy+of+Sciences+of+the+United+States+of+America&rft.issn=00278424&rft_id=info:doi/10.1073%2Fpnas.1207086109 L2 - http://www.ncbi.nlm.nih.gov/pmc/journals/2/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 65 N1 - PubXState - DC N1 - Document feature - illus. N1 - SuppNotes - Supplemental information/data is available in the online version of this article N1 - Last updated - 2013-12-20 N1 - CODEN - PNASA6 N1 - SubjectsTermNotLitGenreText - acoustical waves; alloys; anvil cells; body waves; core; elastic waves; electron diffraction data; high pressure; high temperature; high-energy resolution inelastic X-ray scattering; iron; metals; P-waves; polycrystalline materials; pressure; seismic waves; silicon; temperature; velocity structure; X-ray diffraction data DO - http://dx.doi.org/10.1073/pnas.1207086109 ER - TY - JOUR T1 - Photometric supernova cosmology with beams and sdss-ii AN - 1143502053; 649541-2 AB - Supernova (SN) cosmology without spectroscopic confirmation is an exciting new frontier, which we address here with the Bayesian Estimation Applied to Multiple Species (BEAMS) algorithm and the full three years of data from the Sloan Digital Sky Survey II Supernova Survey (SDSS-II SN). BEAMS is a Bayesian framework for using data from multiple species in statistical inference when one has the probability that each data point belongs to a given species, corresponding in this context to different types of SNe with their probabilities derived from their multi-band light curves. We run the BEAMS algorithm on both Gaussian and more realistic SNANA simulations with of order 10 (super 4) SNe, testing the algorithm against various pitfalls one might expect in the new and somewhat uncharted territory of photometric SN cosmology. We compare the performance of BEAMS to that of both mock spectroscopic surveys and photometric samples that have been cut using typical selection criteria. The latter typically either are biased due to contamination or have significantly larger contours in the cosmological parameters due to small data sets. We then apply BEAMS to the 792 SDSS-II photometric SNe with host spectroscopic redshifts. In this case, BEAMS reduces the area of the Omega (sub m ) , Omega (sub Lambda ) contours by a factor of three relative to the case where only spectroscopically confirmed data are used (297 SNe). In the case of flatness, the constraints obtained on the matter density applying BEAMS to the photometric SDSS-II data are Omega (super BEAMS) (sub m ) = 0.194 + or - 0.07. This illustrates the potential power of BEAMS for future large photometric SN surveys such as Large Synoptic Survey Telescope. Copyright (Copyright) 2012. The American Astronomical Society. All rights reserved. JF - The = Astrophysical Journal AU - Hlozek, Renee AU - Kunz, Martin AU - Bassett, Bruce AU - Smith, Mat AU - Newling, James AU - Varughese, Melvin AU - Kessler, Rick AU - Bernstein, Joseph P AU - Campbell, Heather AU - Dilday, Ben AU - Falck, Bridget AU - Frieman, Joshua AU - Kuhlmann, Steve AU - Lampeitl, Hubert AU - Marriner, John AU - Nichol, Robert C AU - Riess, Adam G AU - Sako, Masao AU - Schneider, Donald P Y1 - 2012/06/20/ PY - 2012 DA - 2012 Jun 20 PB - University of Chicago Press for the American Astronomical Society, Chicago, IL VL - 752 IS - 2 SN - 0004-637X, 0004-637X UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1143502053?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=The+%3D+Astrophysical+Journal&rft.atitle=Photometric+supernova+cosmology+with+beams+and+sdss-ii&rft.au=Hlozek%2C+Renee%3BKunz%2C+Martin%3BBassett%2C+Bruce%3BSmith%2C+Mat%3BNewling%2C+James%3BVarughese%2C+Melvin%3BKessler%2C+Rick%3BBernstein%2C+Joseph+P%3BCampbell%2C+Heather%3BDilday%2C+Ben%3BFalck%2C+Bridget%3BFrieman%2C+Joshua%3BKuhlmann%2C+Steve%3BLampeitl%2C+Hubert%3BMarriner%2C+John%3BNichol%2C+Robert+C%3BRiess%2C+Adam+G%3BSako%2C+Masao%3BSchneider%2C+Donald+P&rft.aulast=Hlozek&rft.aufirst=Renee&rft.date=2012-06-20&rft.volume=752&rft.issue=2&rft.spage=79+%2819pp%29&rft.isbn=&rft.btitle=&rft.title=The+%3D+Astrophysical+Journal&rft.issn=0004637X&rft_id=info:doi/10.1088%2F0004-637X%2F752%2F2%2F79 L2 - http://iopscience.iop.org/0004-637X LA - English DB - GeoRef N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom N1 - PubXState - IL N1 - Last updated - 2017-01-24 DO - http://dx.doi.org/10.1088/0004-637X/752/2/79 ER - TY - JOUR T1 - Grounding annotations in published literature with an emphasis on the functional roles used in metabolic models AN - 1811903565; PQ0003305060 AB - Accurate genome annotations in databases are a critical resource available to the scientific community for analysis and research. Inaccurate and inconsistent annotations exist as a result of errors generated from mass automated annotation, and currently act as a barrier to the application of bioinformatics. The purpose of this effort was to improve the SEED by improving the connection of functional roles to literature references. Direct literature references (DLits), found through searches of PubMed and other online databases such as SwissProt, were attached to protein sequences within the PubSEED to provide literature support for the roughly 2,500 distinct functional roles used to construct metabolic models within the Model SEED. Only DLits in which a researcher asserted the function of a protein were attached to sequences. Starting from a list of 1,072 functional roles that did not previously have DLit support, we were able to connect sequences to literature for 655 functional roles, at least 484 of which were in the original list of unsupported roles. When added to the existing set of sequences having DLits, the resulting set of DLit-sequence pairs (the foundation set) now connects approximately 4,300 DLits to approximately 5,600 distinct protein sequences obtained from approximately 16,000 genes (some of these genes have identical protein sequences). From the foundation set, we construct projection sets such that each set contains one member of the foundation set and projections of its functional role onto similar genes. The projection sets revealed 120 inconsistent annotations within the SEED. Two types of inconsistencies were corrected through manual annotation in the PubSEED: instances in which two identical protein sequences had been annotated with different functions, and instances when projected functions contradicted previous annotations. 26,785 changes to gene function assignment, 219 of which were to previously uncharacterized proteins, resulted in a more consistent and accurate set of input data from which to construct revised metabolic models within the Model SEED. JF - 3 Biotech AU - Binter, Erik AU - Binter, Scott AU - Disz, Terry AU - Kalmanek, Elizabeth AU - Powers, Alexander AU - Pusch, Gordon D AU - Turgeon, Julie AD - Mathematics and Computer Science Division, Argonne National Laboratory, 9700 S Cass Avenue, Argonne, IL, 60439, USA, disz@mcs.anl.gov Y1 - 2012/06// PY - 2012 DA - June 2012 SP - 135 EP - 140 PB - Springer Science & Business Media, Berlin/Heidelberg VL - 2 IS - 2 SN - 2190-572X, 2190-572X KW - Toxicology Abstracts; Biotechnology and Bioengineering Abstracts KW - Genomes KW - Databases KW - Seeds KW - Data processing KW - Bioinformatics KW - Internet KW - Models KW - W 30960:Bioinformatics & Computer Applications KW - X 24300:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1811903565?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=3+Biotech&rft.atitle=Grounding+annotations+in+published+literature+with+an+emphasis+on+the+functional+roles+used+in+metabolic+models&rft.au=Binter%2C+Erik%3BBinter%2C+Scott%3BDisz%2C+Terry%3BKalmanek%2C+Elizabeth%3BPowers%2C+Alexander%3BPusch%2C+Gordon+D%3BTurgeon%2C+Julie&rft.aulast=Binter&rft.aufirst=Erik&rft.date=2012-06-01&rft.volume=2&rft.issue=2&rft.spage=135&rft.isbn=&rft.btitle=&rft.title=3+Biotech&rft.issn=2190572X&rft_id=info:doi/10.1007%2Fs13205-011-0039-z LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2016-08-01 N1 - Number of references - 16 N1 - Last updated - 2016-11-23 N1 - SubjectsTermNotLitGenreText - Genomes; Databases; Seeds; Data processing; Bioinformatics; Internet; Models DO - http://dx.doi.org/10.1007/s13205-011-0039-z ER - TY - JOUR T1 - Predicting bacterial community assemblages using an artificial neural network approach AN - 1038601731; 16824078 AB - Understanding the interactions between the Earth's microbiome and the physical, chemical and biological environment is a fundamental goal of microbial ecology. We describe a bioclimatic modeling approach that leverages artificial neural networks to predict microbial community structure as a function of environmental parameters and microbial interactions. This method was better at predicting observed community structure than were any of several single-species models that do not incorporate biotic interactions. The model was used to interpolate and extrapolate community structure over time with an average Bray-Curtis similarity of 89.7. Additionally, community structure was extrapolated geographically to create the first microbial map derived from single-point observations. This method can be generalized to the many microbial ecosystems for which detailed taxonomic data are currently being generated, providing an observation-based modeling technique for predicting microbial taxonomic structure in ecological studies. JF - Nature Methods AU - Larsen, Peter E AU - Field, Dawn AU - Gilbert, Jack A AD - Argonne National Laboratory Biosciences Division, Argonne, Illinois, USA. Y1 - 2012/05// PY - 2012 DA - May 2012 SP - 621 EP - 625 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 9 IS - 6 SN - 1548-7091, 1548-7091 KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Biotechnology and Bioengineering Abstracts; Microbiology Abstracts B: Bacteriology KW - Bacteria KW - Data processing KW - Community structure KW - Neural networks KW - Models KW - J 02310:Genetics & Taxonomy KW - A 01450:Environmental Pollution & Waste Treatment KW - W 30900:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1038601731?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nature+Methods&rft.atitle=Predicting+bacterial+community+assemblages+using+an+artificial+neural+network+approach&rft.au=Larsen%2C+Peter+E%3BField%2C+Dawn%3BGilbert%2C+Jack+A&rft.aulast=Larsen&rft.aufirst=Peter&rft.date=2012-05-01&rft.volume=9&rft.issue=6&rft.spage=621&rft.isbn=&rft.btitle=&rft.title=Nature+Methods&rft.issn=15487091&rft_id=info:doi/10.1038%2Fnmeth.1975 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-09-01 N1 - Last updated - 2013-10-04 N1 - SubjectsTermNotLitGenreText - Data processing; Neural networks; Community structure; Models; Bacteria DO - http://dx.doi.org/10.1038/nmeth.1975 ER - TY - JOUR T1 - Neutron Balance Analysis for Sustainability of Breed-and-Burn Reactors AN - 1032898558; 16893215 AB - One objective of the present work is to determine the minimum burnup (BU) required to sustain a breed-and-burn (B&B) mode of operation in a large 3000-MW(thermal) sodium-cooled fast reactor core fed with depleted uranium-based metallic fuel. Another objective is to assess the feasibility of using the fuel discharged at the minimum required BU for fabricating the starter of an additional B&B core without separation of actinides and most of the solid fission products. A melt-refining process is used to remove gaseous and volatile fission products and to replace the cladding when it reaches its 200 displacements per atom radiation damage limit. Additional objectives are to assess the validity of a simplified zero-dimensional (0-D) neutron balance analysis for determination of the minimum BU required and the maximum BU attainable in a B&B mode of operation and to apply this 0-D methodology to assess the feasibility of establishing a B&B mode of operation in fast reactor cores made of different combinations of fuels, coolants, and structural materials. It is found that the minimum BU required to sustain the B&B mode in the referenced depleted uranium-fueled B&B reactor is 19.4% FIMA. The number of excess neutrons that can be generated by the fuel discharged at 19.4% FIMA is found sufficient to establish the B&B mode in another B&B core. The net doubling time for starting new B&B reactors with fuel discharged from operating B&B reactors is 12.3 yr. The minimum BU required to sustain the B&B mode of operation in alternative core designs was found to be 29% FIMA when using Pb-Bi coolant with metallic uranium fuel and 40% FIMA when using nitride fuel with sodium coolant. The B&B mode of operation cannot be established using thorium fuel and liquid-metal coolant. The results derived from the neutron balance analysis strongly depend on the value of the estimated neutron leakage probability and the fraction of neutrons lost in the reactivity control systems. A neutron balance performed using a simplified 0-D core model, although not accurate due to, primarily, inaccurate spectra predictions, provides reasonable estimates of the minimum required and the maximum attainable BUs despite the fact that its k(x) evolution prediction is inaccurate. The 0-D approach can save much computational effort and time and is found to be useful for scoping analysis. JF - Nuclear Science and Engineering AU - Heidet, Florent AU - Greenspan, Ehud AD - University of California, Department of Nuclear Engineering Berkeley, California 94720-1730, fheidet@anl.gov Y1 - 2012/05// PY - 2012 DA - May 2012 SP - 13 EP - 31 PB - American Nuclear Society, Inc., 555 N. Kensington Ave. La Grange Park IL 60525 United States VL - 171 IS - 1 SN - 0029-5639, 0029-5639 KW - Sustainability Science Abstracts KW - Prediction KW - Feasibility studies KW - Sodium KW - fission products KW - Nuclear reactors KW - Fuels KW - Nuclear fuels KW - Sustainability KW - Actinides KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1032898558?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Nuclear+Science+and+Engineering&rft.atitle=Neutron+Balance+Analysis+for+Sustainability+of+Breed-and-Burn+Reactors&rft.au=Heidet%2C+Florent%3BGreenspan%2C+Ehud&rft.aulast=Heidet&rft.aufirst=Florent&rft.date=2012-05-01&rft.volume=171&rft.issue=1&rft.spage=13&rft.isbn=&rft.btitle=&rft.title=Nuclear+Science+and+Engineering&rft.issn=00295639&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-08-01 N1 - Number of references - 18 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Sodium; Feasibility studies; Prediction; fission products; Nuclear reactors; Fuels; Nuclear fuels; Sustainability; Actinides ER - TY - JOUR T1 - Location and distribution of inorganic material in a low ash yield, subbituminous coal AN - 1020537931; 2012-056639 AB - Previous studies of mineral matter in low ash yield, low rank coals have suggested that much of the inorganic material is present as organically bound elements rather than as discrete minerals. This study investigates the location and occurrence of this inorganic material to the angstrom level using non-invasive small angle scattering techniques. Microstructural analysis conducted on matrix and vitrain samples, collected from the subbituminous coals of the Huntly coalfield, found that the inorganic material is located in the 12.5Aa65% of the variance in community diversity. The results suggested that seasonal changes in environmental variables are more important than trophic interactions. Interestingly, microbial association network analysis showed that correlations in abundance were stronger within bacterial taxa rather than between bacteria and eukaryotes, or between bacteria and environmental variables. JF - ISME Journal AU - Gilbert, Jack A AU - Steele, Joshua A AU - Caporaso, J Gregory AU - Steinbrueck, Lars AU - Reeder, Jens AU - Temperton, Ben AU - Huse, Susan AU - McHardy, Alice C AU - Knight, Rob AU - Joint, Ian AU - Somerfield, Paul AU - Fuhrman, Jed A AU - Field, Dawn AD - 1] Plymouth Marine Laboratory, Prospect Place, Plymouth, UK [2] Institute of Genomics and Systems Biology, Argonne National Laboratory, Argonne, IL, USA [3] Department of Ecology and Evolution, University of Chicago, Chicago, IL, USA Y1 - 2012/02// PY - 2012 DA - February 2012 SP - 298 EP - 308 PB - Nature Publishing Group, The Macmillan Building London N1 9XW United Kingdom VL - 6 IS - 2 SN - 1751-7362, 1751-7362 KW - Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources; ASFA Marine Biotechnology Abstracts; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Data processing KW - Photoperiods KW - Abundance KW - Climate change KW - ANE, British Isles, England, Devon, Plymouth KW - Biodiversity KW - Biomass KW - Environmental factors KW - Protists KW - Community composition KW - Trophic structure KW - Rickettsiales KW - Oceans KW - Species diversity KW - Metazoa KW - rRNA 16S KW - Seasonal variations KW - O 1010:Viruses, Bacteria, Protists, Fungi and Plants KW - Q4 27750:Environmental KW - A 01450:Environmental Pollution & Waste Treatment KW - Q1 08422:Environmental effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1017955954?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologya&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ISME+Journal&rft.atitle=Defining+seasonal+marine+microbial+community+dynamics&rft.au=Gilbert%2C+Jack+A%3BSteele%2C+Joshua+A%3BCaporaso%2C+J+Gregory%3BSteinbrueck%2C+Lars%3BReeder%2C+Jens%3BTemperton%2C+Ben%3BHuse%2C+Susan%3BMcHardy%2C+Alice+C%3BKnight%2C+Rob%3BJoint%2C+Ian%3BSomerfield%2C+Paul%3BFuhrman%2C+Jed+A%3BField%2C+Dawn&rft.aulast=Gilbert&rft.aufirst=Jack&rft.date=2012-02-01&rft.volume=6&rft.issue=2&rft.spage=298&rft.isbn=&rft.btitle=&rft.title=ISME+Journal&rft.issn=17517362&rft_id=info:doi/10.1038%2Fismej.2011.107 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-05-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Community composition; Trophic structure; Photoperiods; Climate change; Species diversity; Biodiversity; Seasonal variations; Environmental factors; Protists; Data processing; Oceans; Abundance; Biomass; rRNA 16S; Rickettsiales; Metazoa; ANE, British Isles, England, Devon, Plymouth DO - http://dx.doi.org/10.1038/ismej.2011.107 ER - TY - CPAPER T1 - Evaluating Technologies to Achieve the Great Lakes Water Quality Objective for Hg in Wastewater T2 - 15th Annual Energy, Utility & Environment Conference (EUEC 2012) AN - 1313100957; 6151100 JF - 15th Annual Energy, Utility & Environment Conference (EUEC 2012) AU - Gillenwater, Patricia AU - Negri, Cristina AU - Demirtas, Meltem AU - Snyder, Seth Y1 - 2012/01/30/ PY - 2012 DA - 2012 Jan 30 KW - North America, Great Lakes KW - Wastewater KW - Water quality KW - Lakes KW - Technology KW - Waste water UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313100957?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=15th+Annual+Energy%2C+Utility+%26+Environment+Conference+%28EUEC+2012%29&rft.atitle=Evaluating+Technologies+to+Achieve+the+Great+Lakes+Water+Quality+Objective+for+Hg+in+Wastewater&rft.au=Gillenwater%2C+Patricia%3BNegri%2C+Cristina%3BDemirtas%2C+Meltem%3BSnyder%2C+Seth&rft.aulast=Gillenwater&rft.aufirst=Patricia&rft.date=2012-01-30&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=15th+Annual+Energy%2C+Utility+%26+Environment+Conference+%28EUEC+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://euec.com/getattachment/Index/Brochure_2012.pdf.aspx LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Risk to Electiricity Generation from Drought in the Western United States T2 - 15th Annual Energy, Utility & Environment Conference (EUEC 2012) AN - 1313100518; 6151088 JF - 15th Annual Energy, Utility & Environment Conference (EUEC 2012) AU - Harto, Christopher AU - Yan, Yuejun AU - Demissie, Yonas AU - Tidwell, Vincent Y1 - 2012/01/30/ PY - 2012 DA - 2012 Jan 30 KW - USA KW - Droughts UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313100518?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=15th+Annual+Energy%2C+Utility+%26+Environment+Conference+%28EUEC+2012%29&rft.atitle=Risk+to+Electiricity+Generation+from+Drought+in+the+Western+United+States&rft.au=Harto%2C+Christopher%3BYan%2C+Yuejun%3BDemissie%2C+Yonas%3BTidwell%2C+Vincent&rft.aulast=Harto&rft.aufirst=Christopher&rft.date=2012-01-30&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=15th+Annual+Energy%2C+Utility+%26+Environment+Conference+%28EUEC+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://euec.com/getattachment/Index/Brochure_2012.pdf.aspx LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Sustainable Employee Commuting - Picking Scope 3 Ghg Reduction Battles T2 - 15th Annual Energy, Utility & Environment Conference (EUEC 2012) AN - 1313078367; 6151086 JF - 15th Annual Energy, Utility & Environment Conference (EUEC 2012) AU - Hodge, Devin Y1 - 2012/01/30/ PY - 2012 DA - 2012 Jan 30 KW - Greenhouse gases KW - Sustainable development KW - Commuting KW - Personnel UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313078367?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=15th+Annual+Energy%2C+Utility+%26+Environment+Conference+%28EUEC+2012%29&rft.atitle=Sustainable+Employee+Commuting+-+Picking+Scope+3+Ghg+Reduction+Battles&rft.au=Hodge%2C+Devin&rft.aulast=Hodge&rft.aufirst=Devin&rft.date=2012-01-30&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=15th+Annual+Energy%2C+Utility+%26+Environment+Conference+%28EUEC+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://euec.com/getattachment/Index/Brochure_2012.pdf.aspx LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Nanostructured bilayered vanadium oxide electrodes for rechargeable sodium-ion batteries. AN - 917854793; 22148185 AB - Tailoring nanoarchitecture of materials offers unprecedented opportunities in utilization of their functional properties. Nanostructures of vanadium oxide, synthesized by electrochemical deposition, are studied as a cathode material for rechargeable Na-ion batteries. Ex situ and in situ synchrotron characterizations revealed the presence of an electrochemically responsive bilayered structure with adjustable intralayer spacing that accommodates intercalation of Na(+) ions. Sodium intake induces organization of overall structure with appearance of both long- and short-range order, while deintercalation is accompanied with the loss of long-range order, whereas short-range order is preserved. Nanostructured electrodes achieve theoretical reversible capacity for Na(2)V(2)O(5) stochiometry of 250 mAh/g. The stability evaluation during charge-discharge cycles at room temperature revealed an efficient 3 V cathode material with superb performance: energy density of ~760 Wh/kg and power density of 1200 W/kg. These results demonstrate feasibility of development of the ambient temperature Na-ion rechargeable batteries by employment of electrodes with tailored nanoarchitectures. JF - ACS nano AU - Tepavcevic, Sanja AU - Xiong, Hui AU - Stamenkovic, Vojislav R AU - Zuo, Xiaobing AU - Balasubramanian, Mahalingam AU - Prakapenka, Vitali B AU - Johnson, Christopher S AU - Rajh, Tijana AD - Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA. Y1 - 2012/01/24/ PY - 2012 DA - 2012 Jan 24 SP - 530 EP - 538 VL - 6 IS - 1 KW - Ions KW - 0 KW - Vanadium Compounds KW - Sodium KW - 9NEZ333N27 KW - vanadium pentoxide KW - BVG363OH7A KW - Index Medicus KW - Equipment Design KW - Equipment Failure Analysis KW - Energy Transfer KW - Particle Size KW - Equipment Reuse KW - Vanadium Compounds -- chemistry KW - Nanostructures -- ultrastructure KW - Nanostructures -- chemistry KW - Electric Power Supplies KW - Nanotechnology -- instrumentation KW - Electrodes KW - Sodium -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/917854793?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=ACS+nano&rft.atitle=Nanostructured+bilayered+vanadium+oxide+electrodes+for+rechargeable+sodium-ion+batteries.&rft.au=Tepavcevic%2C+Sanja%3BXiong%2C+Hui%3BStamenkovic%2C+Vojislav+R%3BZuo%2C+Xiaobing%3BBalasubramanian%2C+Mahalingam%3BPrakapenka%2C+Vitali+B%3BJohnson%2C+Christopher+S%3BRajh%2C+Tijana&rft.aulast=Tepavcevic&rft.aufirst=Sanja&rft.date=2012-01-24&rft.volume=6&rft.issue=1&rft.spage=530&rft.isbn=&rft.btitle=&rft.title=ACS+nano&rft.issn=1936-086X&rft_id=info:doi/10.1021%2Fnn203869a LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2012-05-15 N1 - Date created - 2012-01-24 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1021/nn203869a ER - TY - CPAPER T1 - Effect of Hard Coatings on Tribochemical Film Behavior in Lubricated Sliding Contact T2 - 2012 Advanced Ceramic Coatings for Structural, Environmental, and Functional Applications AN - 1313085882; 6107572 JF - 2012 Advanced Ceramic Coatings for Structural, Environmental, and Functional Applications AU - Martin, Maria AU - Ajayi, Oyelayo AU - Torrel, Sol AU - Demas, Nicholaos AU - Fenske, George Y1 - 2012/01/22/ PY - 2012 DA - 2012 Jan 22 KW - Coating materials KW - Slumping UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313085882?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Advanced+Ceramic+Coatings+for+Structural%2C+Environmental%2C+and+Functional+Applications&rft.atitle=Effect+of+Hard+Coatings+on+Tribochemical+Film+Behavior+in+Lubricated+Sliding+Contact&rft.au=Martin%2C+Maria%3BAjayi%2C+Oyelayo%3BTorrel%2C+Sol%3BDemas%2C+Nicholaos%3BFenske%2C+George&rft.aulast=Martin&rft.aufirst=Maria&rft.date=2012-01-22&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Advanced+Ceramic+Coatings+for+Structural%2C+Environmental%2C+and+Functional+Applications&rft.issn=&rft_id=info:doi/ L2 - http://ceramics.org/wp-content/uploads/2011/12/symposium-2.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Visualizing the Dynamic Life of Cellular Metals, and the Proteins that Bind Them T2 - 2012 Gordon Research Conference on Metals in Biology AN - 1313078783; 6102749 JF - 2012 Gordon Research Conference on Metals in Biology AU - Finney, Lydia Y1 - 2012/01/22/ PY - 2012 DA - 2012 Jan 22 KW - Metals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313078783?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Gordon+Research+Conference+on+Metals+in+Biology&rft.atitle=Visualizing+the+Dynamic+Life+of+Cellular+Metals%2C+and+the+Proteins+that+Bind+Them&rft.au=Finney%2C+Lydia&rft.aulast=Finney&rft.aufirst=Lydia&rft.date=2012-01-22&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Gordon+Research+Conference+on+Metals+in+Biology&rft.issn=&rft_id=info:doi/ L2 - http://www.grc.org/programs.aspx?year=2012&program=metalsbio LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Photodissolution of soil organic matter AN - 1026859365; 2012-067111 AB - Sunlight has been shown to enhance loss of organic matter from aquatic sediments and terrestrial plant litter, so we tested for similar reactions in mineral soil horizons. Losses of up to a third of particulate organic carbon occurred after continuous exposure to full-strength sunlight for dozens of hours, with similar amounts appearing as photodissolved organic carbon. Nitrogen dissolved similarly, appearing partly as ammonium. Modified experiments with interruption of irradiation to include extended dark incubation periods increased loss of total organic carbon, implying remineralization by some combination of light and microbes. These photodissolution reactions respond strongly to water content, with reaction extent under air-dry to fully wet conditions increasing by a factor of 3-4 fold. Light limitation was explored using lamp intensity and soil depth experiments. Reaction extent varied linearly with lamp intensity. Depth experiments indicate that attenuation of reaction occurs within the top tens to hundreds of micrometers of soil depth. Our data allow only order-of-magnitude extrapolations to field conditions, but suggest that this type of reaction could induce loss of 10-20% of soil organic carbon in the top 10cm horizon over a century. It may therefore have contributed to historical losses of soil carbon via agriculture, and should be considered in soil management on similar time scales. JF - Geoderma AU - Mayer, Lawrence M AU - Thornton, Kathleen R AU - Schick, Linda L AU - Jastrow, Julie D AU - Harden, Jennifer W Y1 - 2012/01/15/ PY - 2012 DA - 2012 Jan 15 SP - 314 EP - 321 PB - Elsevier, Amsterdam VL - 170 SN - 0016-7061, 0016-7061 KW - soils KW - laboratory studies KW - reactivity KW - organic compounds KW - experimental studies KW - chemical reactions KW - photochemistry KW - water content KW - solution KW - geochemistry KW - depth KW - 02C:Geochemistry of rocks, soils, and sediments KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1026859365?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geoderma&rft.atitle=Photodissolution+of+soil+organic+matter&rft.au=Mayer%2C+Lawrence+M%3BThornton%2C+Kathleen+R%3BSchick%2C+Linda+L%3BJastrow%2C+Julie+D%3BHarden%2C+Jennifer+W&rft.aulast=Mayer&rft.aufirst=Lawrence&rft.date=2012-01-15&rft.volume=170&rft.issue=&rft.spage=314&rft.isbn=&rft.btitle=&rft.title=Geoderma&rft.issn=00167061&rft_id=info:doi/10.1016%2Fj.geoderma.2011.11.030 L2 - http://www.sciencedirect.com/science/journal/00167061 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 42 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2012-07-19 N1 - CODEN - GEDMAB N1 - SubjectsTermNotLitGenreText - chemical reactions; depth; experimental studies; geochemistry; laboratory studies; organic compounds; photochemistry; reactivity; soils; solution; water content DO - http://dx.doi.org/10.1016/j.geoderma.2011.11.030 ER - TY - JOUR T1 - Simultaneously Mitigating Near-Term Climate Change and Improving Human Health and Food Security AN - 923209815; 16243357 AB - Tropospheric ozone and black carbon (BC) contribute to both degraded air quality and global warming. We considered approximately 400 emission control measures to reduce these pollutants by using current technology and experience. We identified 14 measures targeting methane and BC emissions that reduce projected global mean warming approximately 0.5 degree C by 2050. This strategy avoids 0.7 to 4.7 million annual premature deaths from outdoor air pollution and increases annual crop yields by 30 to 135 million metric tons due to ozone reductions in 2030 and beyond. Benefits of methane emissions reductions are valued at $700 to $5000 per metric ton, which is well above typical marginal abatement costs (less than $250). The selected controls target different sources and influence climate on shorter time scales than those of carbon dioxide-reduction measures. Implementing both substantially reduces the risks of crossing the 2 degree C threshold. JF - Science (Washington) AU - Shindell, Drew AU - Kuylenstierna, Johan CI AU - Vignati, Elisabetta AU - van Dingenen, Rita AU - Amann, Markus AU - Klimont, Zbigniew AU - Anenberg, Susan C AU - Muller, Nicholas AU - Janssens-Maenhout, Greet AU - Raes, Frank AU - Schwartz, Joel AU - Faluvegi, Greg AU - Pozzoli, Luca AU - Kupiainen, Kaarle AU - Hoeglund-Isaksson, Lena AU - Emberson, Lisa AU - Streets, David AU - Ramanathan, V AU - Hicks, Kevin AU - Oanh, NTKim AU - Milly, George AU - Williams, Martin AU - Demkine, Volodymyr AU - Fowler, David AD - NASA Goddard Institute for Space Studies and Columbia Earth Institute, Columbia University, New York, NY 10025, USA. Stockholm Environment Institute, Environment Department, University of York, York YO10 5DD, UK. Joint Research Centre of the European Commission, Ispra 21027, Italy. International Institute for Applied Systems Analysis, Laxenburg A-2361, Austria. U.S. Environmental Protection Agency, Washington, DC 20460, USA. Department of Economics, Middlebury College, Middlebury, VT 05753, USA. Department of Environmental Health, Harvard School of Public Health, Boston, MA 02215, USA. Argonne National Laboratory, Argonne, IL 60439, USA. Scripps Institute of Oceanography, University of California, San Diego, San Diego, CA 92093, USA. Asian Institute of Technology, Bangkok 10400, Thailand. Environmental Research Group, King's College London, London SE1 9NH, UK. United Nations Environment Programme (UNEP), Nairobi 00100, Kenya. Center for Ecology and Hydrology, Midlothian EH26 0QB, UK. Y1 - 2012/01/13/ PY - 2012 DA - 2012 Jan 13 SP - 183 EP - 189 PB - American Association for the Advancement of Science, 1200 New York Avenue, NW Washington DC 20005 United States VL - 335 IS - 6065 SN - 0036-8075, 0036-8075 KW - Pollution Abstracts; Sustainability Science Abstracts; Health & Safety Science Abstracts KW - Air pollution KW - Methane KW - Economics KW - Climate change KW - Emission control KW - Greenhouse effect KW - Ozone KW - Technology KW - H 6000:Natural Disasters/Civil Defense/Emergency Management KW - P 0000:AIR POLLUTION KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/923209815?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+%28Washington%29&rft.atitle=Simultaneously+Mitigating+Near-Term+Climate+Change+and+Improving+Human+Health+and+Food+Security&rft.au=Shindell%2C+Drew%3BKuylenstierna%2C+Johan+CI%3BVignati%2C+Elisabetta%3Bvan+Dingenen%2C+Rita%3BAmann%2C+Markus%3BKlimont%2C+Zbigniew%3BAnenberg%2C+Susan+C%3BMuller%2C+Nicholas%3BJanssens-Maenhout%2C+Greet%3BRaes%2C+Frank%3BSchwartz%2C+Joel%3BFaluvegi%2C+Greg%3BPozzoli%2C+Luca%3BKupiainen%2C+Kaarle%3BHoeglund-Isaksson%2C+Lena%3BEmberson%2C+Lisa%3BStreets%2C+David%3BRamanathan%2C+V%3BHicks%2C+Kevin%3BOanh%2C+NTKim%3BMilly%2C+George%3BWilliams%2C+Martin%3BDemkine%2C+Volodymyr%3BFowler%2C+David&rft.aulast=Shindell&rft.aufirst=Drew&rft.date=2012-01-13&rft.volume=335&rft.issue=6065&rft.spage=183&rft.isbn=&rft.btitle=&rft.title=Science+%28Washington%29&rft.issn=00368075&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-02-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Air pollution; Methane; Climate change; Economics; Greenhouse effect; Emission control; Technology; Ozone ER - TY - JOUR T1 - Climate Change: Sources of Warming in the Late 20th Century AN - 968180497; 16427668 AB - The role of the North Atlantic Oscillation, the Pacific Decadal Oscillation, volcanic and other aerosols, as well as the extraordinary solar activity of the late 20 super(th) century are discussed in the context of the warming since the mid-1970s. Much of that warming is found to be due to natural causes. JF - Energy & Environment AU - Marsh, Gerald E AD - Argonne National Laboratory (Ret), 5433 East View Park Chicago, IL 60615 Y1 - 2012/01// PY - 2012 DA - January 2012 SP - 95 EP - 104 PB - Multi-Science Publishing Co. Ltd., 107 High St. Brentwood, Essex CM14 4RX United Kingdom VL - 23 IS - 1 SN - 0958-305X, 0958-305X KW - Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts; Environment Abstracts KW - North Atlantic Oscillation KW - Aerosols KW - Volcanic activity KW - Climate change KW - Volcanoes KW - IN, Pacific KW - Solar activity KW - Pacific Decadal Oscillation KW - AN, North Atlantic, North Atlantic Oscillation KW - solar activity KW - ENA 03:Energy KW - M2 551.583:Variations (551.583) KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/968180497?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environment&rft.atitle=Climate+Change%3A+Sources+of+Warming+in+the+Late+20th+Century&rft.au=Marsh%2C+Gerald+E&rft.aulast=Marsh&rft.aufirst=Gerald&rft.date=2012-01-01&rft.volume=23&rft.issue=1&rft.spage=95&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environment&rft.issn=0958305X&rft_id=info:doi/10.1260%2F0958-305X.23.1.95 L2 - http://multi-science.metapress.com/link.asp?target=contribution&;id=U2WL754144765412 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-04-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - North Atlantic Oscillation; Volcanic activity; Climate change; Pacific Decadal Oscillation; Solar activity; Aerosols; Volcanoes; solar activity; IN, Pacific; AN, North Atlantic, North Atlantic Oscillation DO - http://dx.doi.org/10.1260/0958-305X.23.1.95 ER - TY - JOUR T1 - Improving data quality on low level mercury wastewater analysis AN - 954652060; 16404342 AB - In order to compare treatability test results evaluating low-level mercury (Hg) removal from oil refinery wastewater, improvements in Hg analytical methods were conducted at two US EPA certified analytical labs. The revisions in the analytical protocols improved Hg recoveries and hence enabled more reliable data interpretation and comparison for the specific wastewater tested. Nevertheless, significant differences between results from the two laboratories were identified in a split-sample experiment. JF - Journal of Environmental Monitoring AU - Gillenwater, P S AU - Urgun-Demirtas, M AU - Negri, M C AU - Alvarado, J AD - Argonne National Laboratory Energy Systems Division, 9700 S. Cass Avenue, Argonne, IL, 60439, USA, negri@anl.gov Y1 - 2012/01// PY - 2012 DA - Jan 2012 SP - 27 EP - 29 VL - 14 IS - 1 SN - 1464-0325, 1464-0325 KW - Aqualine Abstracts; Water Resources Abstracts; Environment Abstracts; Pollution Abstracts KW - Analytical Methods KW - Mercury KW - Wastewater KW - P 3000:SEWAGE & WASTEWATER TREATMENT KW - AQ 00006:Sewage KW - SW 3040:Wastewater treatment processes KW - ENA 19:Water Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/954652060?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Environmental+Monitoring&rft.atitle=Improving+data+quality+on+low+level+mercury+wastewater+analysis&rft.au=Gillenwater%2C+P+S%3BUrgun-Demirtas%2C+M%3BNegri%2C+M+C%3BAlvarado%2C+J&rft.aulast=Gillenwater&rft.aufirst=P&rft.date=2012-01-01&rft.volume=14&rft.issue=1&rft.spage=27&rft.isbn=&rft.btitle=&rft.title=Journal+of+Environmental+Monitoring&rft.issn=14640325&rft_id=info:doi/10.1039%2Fc1em10710k LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-03-01 N1 - Last updated - 2014-02-21 N1 - SubjectsTermNotLitGenreText - Mercury; Wastewater DO - http://dx.doi.org/10.1039/c1em10710k ER - TY - JOUR T1 - ^ AN - 1832635801; 650126-101 JF - Geophysical Research Abstracts AU - Lu, Z -T AU - Jiang, W AU - Sharma, A AU - Bailey, K AU - Mueller, P AU - O'Connor, T P AU - Hu, S -M AU - Purtschert, R AU - Sturchio, N C AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - Abstract EGU2012 EP - 3199 PB - Copernicus GmbH on behalf of the European Geosciences Union (EGU), Katlenburg-Lindau VL - 14 SN - 1029-7006, 1029-7006 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832635801?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysical+Research+Abstracts&rft.atitle=%5E&rft.au=Lu%2C+Z+-T%3BJiang%2C+W%3BSharma%2C+A%3BBailey%2C+K%3BMueller%2C+P%3BO%27Connor%2C+T+P%3BHu%2C+S+-M%3BPurtschert%2C+R%3BSturchio%2C+N+C%3BAnonymous&rft.aulast=Lu&rft.aufirst=Z&rft.date=2012-01-01&rft.volume=14&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Geophysical+Research+Abstracts&rft.issn=10297006&rft_id=info:doi/ L2 - http://meetingorganizer.copernicus.org/EGU2012/EGU2012-3199.pdf http://www.copernicus.org/EGU/gra/gra.html LA - English DB - GeoRef N1 - Conference title - European Geosciences Union general assembly 2012 N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. N1 - Last updated - 2017-01-24 ER - TY - JOUR T1 - Pore formation during dehydration of a polycrystalline gypsum sample observed and quantified in a time-series synchrotron X-ray micro-tomography experiment AN - 1777466787; 2016-026478 AB - We conducted an in-situ X-ray micro-computed tomography heating experiment at the Advanced Photon Source (USA) to dehydrate an unconfined 2.3 mm diameter cylinder of Volterra Gypsum. We used a purpose-built X-ray transparent furnace to heat the sample to 388 K for a total of 310 min to acquire a three-dimensional time-series tomography dataset comprising nine time steps. The voxel size of 2.2 mu m (super 3) proved sufficient to pinpoint reaction initiation and the organization of drainage architecture in space and time. We observed that dehydration commences across a narrow front, which propagates from the margins to the centre of the sample in more than four hours. The advance of this front can be fitted with a square-root function, implying that the initiation of the reaction in the sample can be described as a diffusion process. Novel parallelized computer codes allow quantifying the geometry of the porosity and the drainage architecture from the very large tomographic datasets (2048 (super 3) voxels) in unprecedented detail. We determined position, volume, shape and orientation of each resolvable pore and tracked these properties over the duration of the experiment. We found that the pore-size distribution follows a power law. Pores tend to be anisotropic but rarely crack-shaped and have a preferred orientation, likely controlled by a pre-existing fabric in the sample. With on-going dehydration, pores coalesce into a single interconnected pore cluster that is connected to the surface of the sample cylinder and provides an effective drainage pathway. Our observations can be summarized in a model in which gypsum is stabilized by thermal expansion stresses and locally increased pore fluid pressures until the dehydration front approaches to within about 100 mu m. Then, the internal stresses are released and dehydration happens efficiently, resulting in new pore space. Pressure release, the production of pores and the advance of the front are coupled in a feedback loop. JF - Solid Earth (SE, Gottingen) AU - Fusseis, Florian AU - Schrank, C AU - Liu, J AU - Karrech, A AU - Llana-Funez, S AU - Xiao, X AU - Regenauer-Lieb, K Y1 - 2012 PY - 2012 DA - 2012 SP - 71 EP - 86 PB - Copernicus Publications, Gottingen VL - 3 IS - 1 SN - 1869-9510, 1869-9510 KW - tomography KW - anisotropic materials KW - power law KW - density KW - frequency KW - bassanite KW - synchrotron radiation KW - laboratory studies KW - absorption KW - pore pressure KW - gypsum KW - orientation KW - experimental studies KW - pressure KW - time series analysis KW - three-dimensional models KW - sulfates KW - grain size KW - drainage KW - stress KW - statistical analysis KW - equilibrium KW - porosity KW - thermal expansion KW - physical properties KW - X-ray data KW - computed tomography KW - Volterra Gypsum KW - homogeneity KW - polycrystalline materials KW - atmospheric pressure KW - dehydration KW - anisotropy KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777466787?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Solid+Earth+%28SE%2C+Gottingen%29&rft.atitle=Pore+formation+during+dehydration+of+a+polycrystalline+gypsum+sample+observed+and+quantified+in+a+time-series+synchrotron+X-ray+micro-tomography+experiment&rft.au=Fusseis%2C+Florian%3BSchrank%2C+C%3BLiu%2C+J%3BKarrech%2C+A%3BLlana-Funez%2C+S%3BXiao%2C+X%3BRegenauer-Lieb%2C+K&rft.aulast=Fusseis&rft.aufirst=Florian&rft.date=2012-01-01&rft.volume=3&rft.issue=1&rft.spage=71&rft.isbn=&rft.btitle=&rft.title=Solid+Earth+%28SE%2C+Gottingen%29&rft.issn=18699510&rft_id=info:doi/ L2 - http://www.solid-earth.net/3/71/2012/se-3-71-2012.pdf http://www.solid-earth.net/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 37 N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2016-04-01 N1 - SubjectsTermNotLitGenreText - absorption; anisotropic materials; anisotropy; atmospheric pressure; bassanite; computed tomography; dehydration; density; drainage; equilibrium; experimental studies; frequency; grain size; gypsum; homogeneity; laboratory studies; orientation; physical properties; polycrystalline materials; pore pressure; porosity; power law; pressure; statistical analysis; stress; sulfates; synchrotron radiation; thermal expansion; three-dimensional models; time series analysis; tomography; Volterra Gypsum; X-ray data ER - TY - JOUR T1 - Early-stage phase transformation and growth of iron oxyhydroxides during neutralization of simulated acid mine drainage AN - 1777465383; 2016-029561 AB - Metal and coal mines produce iron-rich sulfuric acid solutions that contain a broad range of toxic elements. These solutions, referred to as acid mine drainage (AMD), adversely affect environmental quality. When AMD mixes with neutral water bodies, such as in rivers or during wetland treatment, interacts with rock surfaces, or reacts with lime during remediation, neutralization occurs. As a result, ferric iron (Fe (super 3+) ) hydrolyzes and precipitates as Fe oxyhydroxide nanoparticles, such as ferrihydrite and schwertmannite. However, the formation pathways of these nanoparticles are relatively unknown largely due to their rapid formation rates and low abundances of initially-formed species. In this study, we used in situ time-resolved synchrotron radiation X-ray diffraction (XRD), quick-scanning extended X-ray absorption fine structure (QEXAFs) and UV-Vis spectroscopic techniques to study the products formed initially (2 < t < 60 minutes) when ferric iron sulfate solutions ([Fe (super 3+) ] = 0.2 M) are partially neutralized ([HCO (sub 3) (super -) ]/[Fe (super 3+) ] < 3) by addition of NaHCO (sub 3) . When [HCO (sub 3) (super -) ]/[Fe (super 3+) ] = 0.6 (initial pH approximately 2.2), the only particles formed were ferrihydrite-like clusters that were stable throughout the duration of the experiment. When [HCO (sub 3) (super -) ]/[Fe (super 3+) ] = 1 (initial pH approximately 2.5), the ferrihydrite-like molecular clusters formed initially but mostly disappeared and were replaced by schwertmannite. Schwertmannite and larger ferrihydrite particles formed immediately when [HCO (sub 3) (super -) ]/[Fe (super 3+) ] = 2 (initial pH approximately 2.7), but the ferrihydrite particles completely disappeared and were replaced by schwertmannite. The schwertmannite particle size increased with reaction time, and extensive particle aggregation occurred. The ferrihydrite-like cluster is very intriguing and its structure deserves further characterization. The data are consistent with Fe (sub 13) having Baker-Figgis delta -keggin structure, i.e., the motif in the ferrihydrite structure proposed by Michel et al.. The existence of the cluster may result from sulfate binding on its surface, preventing the cluster from growing into larger ferrihydrite particles. In conclusion, the results suggest that particular molecular clusters and small nanoparticles may be important, early-formed components of natural acidic solutions. JF - Mineralogical Magazine AU - Zhu, Mengqiang AU - Legg, Benjamin AU - Zhang, Hengzhong AU - Gilbert, Benjamin AU - Ren, Yang AU - Banfield, Jillian F AU - Waychunas, Glenn A AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 2601 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - water quality KW - toxic materials KW - sulfuric acid KW - acid mine drainage KW - solutions KW - oxyhydroxides KW - pollution KW - simulation KW - remediation KW - hydroxides KW - X-ray data KW - oxides KW - inorganic acids KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1777465383?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Early-stage+phase+transformation+and+growth+of+iron+oxyhydroxides+during+neutralization+of+simulated+acid+mine+drainage&rft.au=Zhu%2C+Mengqiang%3BLegg%2C+Benjamin%3BZhang%2C+Hengzhong%3BGilbert%2C+Benjamin%3BRen%2C+Yang%3BBanfield%2C+Jillian+F%3BWaychunas%2C+Glenn+A%3BAnonymous&rft.aulast=Zhu&rft.aufirst=Mengqiang&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=2601&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://minmag.geoscienceworld.org/content/76/6/2581.full.pdf+html http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2016-01-01 N1 - Number of references - 2 N1 - Last updated - 2016-04-01 N1 - SubjectsTermNotLitGenreText - acid mine drainage; hydroxides; inorganic acids; oxides; oxyhydroxides; pollution; remediation; simulation; solutions; sulfuric acid; toxic materials; water quality; X-ray data ER - TY - JOUR T1 - Characterization of iron speciation in urban and rural single particles using XANES spectroscopy and micro X-ray fluorescence measurements; investigating the relationship between speciation and fractional iron solubility AN - 1773797472; 2016-021361 AB - Soluble iron in fine atmospheric particles has been identified as a public health concern by participating in reactions that generate reactive oxygen species (ROS). The mineralogy and oxidation state (speciation) of iron have been shown to influence fractional iron solubility (soluble iron/total iron). In this study, iron speciation was determined in single particles at urban and rural sites in Georgia USA using synchrotron-based techniques, such as X-ray Absorption Near-Edge Structure (XANES) spectroscopy and microscopic X-ray fluorescence measurements. Soluble and total iron content (soluble + insoluble iron) of these samples was measured using spectrophotometry and synchrotron-based techniques, respectively. These bulk measurements were combined with synchrotron-based measurements to investigate the relationship between iron speciation and fractional iron solubility in ambient aerosols. XANES measurements indicate that iron in the single particles was present as a mixture of Fe(II) and Fe(III), with Fe(II) content generally between 5 and 35% (mean: approximately 25%). XANES and elemental analyses (e.g. elemental molar ratios of single particles based on microscopic X-ray fluorescence measurements) indicate that a majority (74%) of iron-containing particles are best characterized as Al-substituted Fe-oxides, with a Fe/Al molar ratio of 4.9. The next most abundant group of particles (12%) was Fe-aluminosilicates, with Si/Al molar ratio of 1.4. No correlation was found between fractional iron solubility (soluble iron/total iron) and the abundance of Al-substituted Fe-oxides and Fe-aluminosilicates present in single particles at any of the sites during different seasons, suggesting solubility largely depended on factors other than differences in major iron phases. JF - Atmospheric Chemistry and Physics AU - Oakes, M AU - Weber, R J AU - Lai, B AU - Russell, A AU - Ingall, E D Y1 - 2012 PY - 2012 DA - 2012 SP - 745 EP - 756 PB - Copernicus, Katlenburg-Lindau VL - 12 IS - 2 SN - 1680-7316, 1680-7316 KW - United States KW - silicates KW - oxygen KW - iron oxides KW - iron KW - urban environment KW - Atlanta Georgia KW - XANES spectra KW - synchrotron radiation KW - Fulton County Georgia KW - aluminosilicates KW - transport KW - fluorescence KW - X-ray fluorescence spectra KW - oxides KW - spectra KW - trace elements KW - chemical composition KW - Winder Georgia KW - atmosphere KW - solubility KW - X-ray spectra KW - measurement KW - atmospheric transport KW - metals KW - hydrogen peroxide KW - rural environment KW - Barrow County Georgia KW - aerosols KW - seasonal variations KW - Georgia KW - particles KW - public health KW - chemical fractionation KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1773797472?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Atmospheric+Chemistry+and+Physics&rft.atitle=Characterization+of+iron+speciation+in+urban+and+rural+single+particles+using+XANES+spectroscopy+and+micro+X-ray+fluorescence+measurements%3B+investigating+the+relationship+between+speciation+and+fractional+iron+solubility&rft.au=Oakes%2C+M%3BWeber%2C+R+J%3BLai%2C+B%3BRussell%2C+A%3BIngall%2C+E+D&rft.aulast=Oakes&rft.aufirst=M&rft.date=2012-01-01&rft.volume=12&rft.issue=2&rft.spage=745&rft.isbn=&rft.btitle=&rft.title=Atmospheric+Chemistry+and+Physics&rft.issn=16807316&rft_id=info:doi/ L2 - http://www.atmos-chem-phys.net/12/745/2012/acp-12-745-2012.pdf http://www.atmospheric-chemistry-and-physics.net/home.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany N1 - Date revised - 2016-01-01 N1 - Number of references - 43 N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Includes supplement, http://www.atmos-chem-phys.net/12/745/2012/acp-12-745-2012-supplement.pd f; published in Published in Atmospheric Chemistry and Physics Discussion: 11 August 2011; accessed in Nov., 2013 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - aerosols; aluminosilicates; Atlanta Georgia; atmosphere; atmospheric transport; Barrow County Georgia; chemical composition; chemical fractionation; fluorescence; Fulton County Georgia; Georgia; hydrogen peroxide; iron; iron oxides; measurement; metals; oxides; oxygen; particles; public health; rural environment; seasonal variations; silicates; solubility; spectra; synchrotron radiation; trace elements; transport; United States; urban environment; Winder Georgia; X-ray fluorescence spectra; X-ray spectra; XANES spectra ER - TY - JOUR T1 - The unique biogeochemical signature of the marine diazotroph Trichodesmium AN - 1722154752; 2015-097120 AB - Trichodesmium is a globally important nitrogen-fixing, filamentous cyanobacterium. In the present study, we collected Trichodesmium colonies from the Sargasso Sea and investigated their elemental signature. Element concentrations and spatial distributions in colonies were compared using inductively coupled plasma mass spectrometry (ICPMS), CHN analysis, and synchrotron x-ray fluorescence (SXRF) mapping. Trichodesmium's cellular stoichiometry of 647C:111N:1P deviated significantly from the canonical Redfield ratio and illustrates the P-limiting condition at the time of sampling. Additionally, ICPMS and SXRF analysis confirmed that the metallome of Trichodesmium is enriched in V, Fe and Ni in comparison to other phytoplankton. Surprisingly, V was the most abundant metal in Trichodesmium, and the V quota was up to 4-fold higher than the corresponding Fe quota. Furthermore, SXRF mapping revealed the presence of V and Fe hotspots. These hotspots typically spanned over several contiguous cells. The spatial distribution of Ni differed from V and Fe and was enriched in transverse walls between attached cells. As hotspots of V, Fe, or Ni were spatially decoupled from each other, we conclude that external adsorption of aerosol particles on Trichodesmium trichomes did not contribute to the elevated element quotas. Fe hotspots were found in only ca. 10% of analysed trichome sections, and Fe enrichment in contiguous cells may be linked to diazocytes as zones of nitrogen fixation in Trichodesmium. In contrast, genomic analyses indicated that V is not directly associated with nitrogenase in Trichodesmium. V maybe used in V-dependent haloperoxidases to protect the oxygen susceptible nitrogen fixing enzyme nitrogenase from reactive oxygen species (ROS) such as hydrogen peroxide, but genomic evidence for such an enzymatic role of V is also currently lacking. The presence of Ni in transverse walls is in agreement with genomic evidence for the presence of Ni-superoxide dismutase and/or NiFe hydrogenase. Both Ni-containing enzymes are beneficial for nitrogen fixation by either inactivation of the ROS species superoxide or the catalyzation of hydrogen, respectively. We conclude that the enrichment of these metals is directly or indirectly linked to nitrogen fixation in Trichodesmium. JF - Mineralogical Magazine AU - Nuester, Jochen AU - Vogt, Stefan AU - Newille, Matt AU - Kustka, Adam AU - Twining, Benjamin S AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 2176 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - cyanobacteria KW - Sargasso Sea KW - biochemistry KW - mass spectra KW - iron KW - nitrogen KW - ICP mass spectra KW - diazotrophs KW - spatial distribution KW - vanadium KW - Trichodesmium KW - metals KW - marine environment KW - nickel KW - X-ray fluorescence spectra KW - spectra KW - North Atlantic KW - geochemistry KW - Atlantic Ocean KW - 09:Paleobotany UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1722154752?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=The+unique+biogeochemical+signature+of+the+marine+diazotroph+Trichodesmium&rft.au=Nuester%2C+Jochen%3BVogt%2C+Stefan%3BNewille%2C+Matt%3BKustka%2C+Adam%3BTwining%2C+Benjamin+S%3BAnonymous&rft.aulast=Nuester&rft.aufirst=Jochen&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=2176&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://minmag.geoscienceworld.org/content/76/6/2151.full.pdf+html http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2015-01-01 N1 - Last updated - 2015-10-15 N1 - SubjectsTermNotLitGenreText - Atlantic Ocean; biochemistry; cyanobacteria; diazotrophs; geochemistry; ICP mass spectra; iron; marine environment; mass spectra; metals; nickel; nitrogen; North Atlantic; Sargasso Sea; spatial distribution; spectra; Trichodesmium; vanadium; X-ray fluorescence spectra ER - TY - JOUR T1 - Impacts of Charging Choices for Plug-In Hybrid Electric Vehicles in 2030 Scenario AN - 1671480417; 17526096 AB - This study systematically examined the potential impacts of recharging scenarios for multiple plug-in hybrid electric vehicles (PHEVs) in the western United States-in particular, the service area of the Western Electricity Coordinating Council (WECC)-in 2030. The goal of the study was twofold: to examine the impact of scenarios for market penetration and charging of PHEVs on the electric utilities and transmission grid and to estimate the potential reductions in petroleum use and greenhouse gas (GHG) emissions attributable to PHEV miles traveled on primarily grid electricity. Three charging scenarios for PHEVS were examined: (a) begin recharging upon arrival at home at the end of the last daily trip, (b) complete recharging of batteries just before the start of the first daily trip, and (c) any additional charging opportunity during the daytime. The three charging scenarios produced distinct hourly electric load profiles, with the opportunity-charging scenario resulting in a significant increase in load during the daytime. However, when the utility dispatch simulations were run for these charging scenarios in the WECC area, they all exhibited similar marginal-generation mixes (dominated by the natural gas combined-cycle technology) to satisfy the PHEV load, and GHG emissions were within 2 % of each other. A well-to-wheel analysis revealed that the marginal-generation mixes produced 40% to 45% lower GHG emissions by PHEVs than did conventional gasoline internal combustion engine vehicles. JF - Transportation Research Record AU - Elgowainy, Amgad AU - Zhou, Yan AU - Vyas, Anant D AU - Mahalik, Matthew AU - Santini, Danilo AU - Wang, Michael AD - Center for Transportation Research, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 aelgowainy@anl.gov Y1 - 2012 PY - 2012 DA - 2012 SP - 9 EP - 17 PB - Transportation Research Board IS - 2287 SN - 0361-1981, 0361-1981 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE) KW - Charging KW - Daytime KW - Recharging KW - Electric potential KW - Electricity KW - Natural gas KW - Hybrid vehicles KW - Emission analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671480417?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transportation+Research+Record&rft.atitle=Impacts+of+Charging+Choices+for+Plug-In+Hybrid+Electric+Vehicles+in+2030+Scenario&rft.au=Elgowainy%2C+Amgad%3BZhou%2C+Yan%3BVyas%2C+Anant+D%3BMahalik%2C+Matthew%3BSantini%2C+Danilo%3BWang%2C+Michael&rft.aulast=Elgowainy&rft.aufirst=Amgad&rft.date=2012-01-01&rft.volume=&rft.issue=2287&rft.spage=9&rft.isbn=&rft.btitle=&rft.title=Transportation+Research+Record&rft.issn=03611981&rft_id=info:doi/10.3141%2F2287-02 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Number of references - 30 N1 - Last updated - 2015-04-09 DO - http://dx.doi.org/10.3141/2287-02 ER - TY - JOUR T1 - Fabrication of nested elliptical KB mirrors using profile coating for synchrotron radiation X-ray focusing AN - 1671287420; 16165448 AB - This paper describes fabrication methods used to demonstrate the advantages of nested or Montel optics for micro/nanofocusing of synchrotron X-ray beams. A standard Kirkpatrick-Baez (KB) mirror system uses two separated elliptical mirrors at glancing angles to the X-ray beam and sequentially arranged at 90 degree to each other to focus X-rays successively in the vertical and horizontal directions. A nested KB mirror system has the two mirrors positioned perpendicular and side-by-side to each other. Compared to a standard KB mirror system, Montel optics can focus a larger divergence and the mirrors can have a shorter focal length. As a result, nested mirrors can be fabricated with improved demagnification factor and ultimately smaller focal spot, than with a standard KB arrangement. The nested system is also more compact with an increased working distance, and is more stable, with reduced complexity of mirror stages. However, although Montel optics is commercially available for laboratory X-ray sources, due to technical difficulties they have not been used to microfocus synchrotron radiation X-rays, where ultra-precise mirror surfaces are essential. The main challenge in adapting nested optics for synchrotron microfocusing is to fabricate mirrors with a precise elliptical surface profile at the very edge where the two mirrors meet and where X-rays scatter. For example, in our application to achieve a sub-micron focus with high efficiency, a surface figure root-mean-square (rms) error on the order of 1nm is required in the useable area along the X-ray footprint with a a arrow right 40.1mm-diameter cross section. In this paper we describe promising ways to fabricate precise nested KB mirrors using our profile coating technique and inexpensive flat Si substrates. JF - Applied Surface Science AU - Liu, Chian AU - Ice, GE AU - Liu, W AU - Assoufid, L AU - Qian, J AU - Shi, B AU - Khachatryan, R AU - Wieczorek, M AU - Zschack, P AU - Tischler, J Z AD - X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA cliu@aps.anl.gov Y1 - 2012/01/01/ PY - 2012 DA - 2012 Jan 01 SP - 2182 EP - 2186 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 258 IS - 6 SN - 0169-4332, 0169-4332 KW - Solid State and Superconductivity Abstracts (SO); METADEX (MD); Advanced Polymers Abstracts (EP); Environmental Engineering Abstracts (EN); Composites Industry Abstracts (ED); Engineered Materials Abstracts, Ceramics (EC) KW - Beams (radiation) KW - X-rays KW - Coating KW - Synchrotrons KW - Synchrotron radiation KW - Focusing KW - Standards KW - Nanostructure UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671287420?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Surface+Science&rft.atitle=Fabrication+of+nested+elliptical+KB+mirrors+using+profile+coating+for+synchrotron+radiation+X-ray+focusing&rft.au=Liu%2C+Chian%3BIce%2C+GE%3BLiu%2C+W%3BAssoufid%2C+L%3BQian%2C+J%3BShi%2C+B%3BKhachatryan%2C+R%3BWieczorek%2C+M%3BZschack%2C+P%3BTischler%2C+J+Z&rft.aulast=Liu&rft.aufirst=Chian&rft.date=2012-01-01&rft.volume=258&rft.issue=6&rft.spage=2182&rft.isbn=&rft.btitle=&rft.title=Applied+Surface+Science&rft.issn=01694332&rft_id=info:doi/10.1016%2Fj.apsusc.2011.02.079 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-05-01 N1 - Last updated - 2015-04-09 DO - http://dx.doi.org/10.1016/j.apsusc.2011.02.079 ER - TY - JOUR T1 - Dissimilatory iron reduction and the redox cycling of green rust AN - 1612262391; 2014-079880 AB - Green rusts (mixed Fe (super II) /Fe (super III) layered double hydroxides) have been identified in Fe (super III) /Fe (super II) transition zones in a variety of natural and engineered subsurface environments including groundwater, soils, and sediments, and among corrosion products in zero valent iron permeable reactive barriers. Many of these environments are characterized by periodic or seasonal cycling of redox conditions (e.g., redoximorphic soils in areas with seasonal flooding) that create the opportunity for cycling of Fe between oxidized and reduced forms. In recent years evidence has been building that suggests that the green rust mineral fougerite plays a central role in Fe redox cycling in these environments. Carbonate green rust was produced in anoxic defined mineral medium containing 75 mM formate and 80 mM Fe (super III) , in the form of phosphate doped (0.7 mass % P) lepidocrocite, inoculated with Shewanella putrefaciens CN32. The green rust was then oxidized by introducing sterile air into the headspace. After 24 h the suspensions were sparged with sterile Ar and re-inoculated with S. putrefaciens CN32. Samples were collected for measurement of Fe (super II) and characterization of the secondary mineralization products by powder X-ray diffraction, scanning electron microscopy, and (super 57) Fe Mossbauer spectroscopy. Results of the analysis of the product of green rust oxidation were consistent with ferric green rust. In our experiment, the oxidation of green rust by O (sub 2) to ferric green rust occurred over a period of 24 h without the formation of other Fe (super III) oxide phases. However, the initial green rust was formed in the presence of phosphate and sorption of phosphate or silicate by green rust has been shown to promote oxidation of green rust to ferric green rust by suppressing the dissolution of green rust, a prerequisite for the formation of other ferric phases such as lepidocrocite or goethite. After re-inoculation, total Fe (super II) concentrations rebounded to pre-oxidation concentrations and green rust was observed as the dominant secondary mineralization product. Since phosphate and silicate are typically available in soils and sediments, similar conditions may be encountered in-situ. Thus, our results indicate the potential for cycling of green rust between reduced and oxidized forms under redox dynamics similar to those encountered in environments that alternate between iron-reducing and oxic conditions and are consistent with the identification of green rust in soils/sediments with seasonal redox cycling. JF - Mineralogical Magazine AU - O'Loughlin, Edward J AU - Boyanov, Maxim I AU - Gorski, Christopher A AU - McCormick, Michael L AU - Scherer, Michelle M AU - Kemner, Kenneth M AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - soils KW - soil vapor extraction KW - oxidation KW - air sparging KW - hydrochemistry KW - iron hydroxides KW - ground water KW - geochemical cycle KW - hydroxides KW - sediments KW - oxides KW - anaerobic environment KW - seasonal variations KW - chemical composition KW - geochemistry KW - Eh KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1612262391?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Dissimilatory+iron+reduction+and+the+redox+cycling+of+green+rust&rft.au=O%27Loughlin%2C+Edward+J%3BBoyanov%2C+Maxim+I%3BGorski%2C+Christopher+A%3BMcCormick%2C+Michael+L%3BScherer%2C+Michelle+M%3BKemner%2C+Kenneth+M%3BAnonymous&rft.aulast=O%27Loughlin&rft.aufirst=Edward&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://minmag.geoscienceworld.org/content/76/6/2179.full.pdf+html http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-10-16 N1 - SubjectsTermNotLitGenreText - air sparging; anaerobic environment; chemical composition; Eh; geochemical cycle; geochemistry; ground water; hydrochemistry; hydroxides; iron hydroxides; oxidation; oxides; seasonal variations; sediments; soil vapor extraction; soils ER - TY - JOUR T1 - In-situ observations of the formation of a single-layer gibbsite-like phase on the muscovite (001) surface AN - 1566816267; 2014-077589 AB - Hydrolysis of a multivalent cation in aqueous solutions often precedes secondary reactions such as oligomerization. It is known that such reactions can be controlled by the presence of solid surfaces. Previous work showed that crystalline Al-hydroxide phases formed on the surface of muscovite mica with an apparent epitaxial relationship to the underlying surface, but the molecular-scale interfacial processes that initiate the reactions are not well understood. We investigated the formation of an Al-hydroxide phase on the basal surface of single crystal muscovite by monitoring changes in muscovite-solution interfacial structure using in-situ high resolution x-ray reflectivity. Experimental solutions were prepared with a fixed total Al content (1 mM) as a function of pH. At pH 4, we observed sorbed Al (super 3+) species formed an approximately 2A thick film. The thickness and the vertical structure of the film matches those of a single Al dioctahedral sheet, i.e., gibbsite, Al(OH) (sub 3) , phase. The films formed at lower pH (2 and 3) are structurally more disordered and are less dense (i.e., covered a smaller fraction of the surface) than that formed at pH 4. These observations can be attributed to decrease in the concentration of hydrolyzed Al species with decreasing pH, both in the solution and at the surface. No film formation was observed at alkaline conditions (pH 9-12) where Al (super 3+) occurs primarily as an anionic species, Al(OH) (sub 4) (super -) . The difference implies that the formation of the film is initiated by adsorption of positively-charged Al species at the negatively charged surface. The results demonstrate that the growth of secondary minerals and the structural control of underlying substrates can be investigated in situ, in real time, and with a molecular-scale resolution. The results also suggest a new capability to characterize the reactivity of nanomineral films with a high resolution. JF - Mineralogical Magazine AU - Lee, Sang Soo AU - Schmidt, Moritz AU - Nagy, Kathryn L AU - Fenter, Paul AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 1991 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - silicates KW - high-resolution methods KW - in situ KW - muscovite KW - hydrolysis KW - observations KW - controls KW - X-ray data KW - mica group KW - oxides KW - sheet silicates KW - gibbsite KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566816267?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=In-situ+observations+of+the+formation+of+a+single-layer+gibbsite-like+phase+on+the+muscovite+%28001%29+surface&rft.au=Lee%2C+Sang+Soo%3BSchmidt%2C+Moritz%3BNagy%2C+Kathryn+L%3BFenter%2C+Paul%3BAnonymous&rft.aulast=Lee&rft.aufirst=Sang&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=1991&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://minmag.geoscienceworld.org/content/76/6/1965.full.pdf+html http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 3 N1 - Last updated - 2014-10-02 N1 - SubjectsTermNotLitGenreText - controls; gibbsite; high-resolution methods; hydrolysis; in situ; mica group; muscovite; observations; oxides; sheet silicates; silicates; X-ray data ER - TY - BOOK T1 - Underlying uncertainty in future projection of iron deposition to the ocean AN - 1545409294; 2014-054819 JF - AOGS-AGU (WPGM) joint assembly AU - Ito, Akinori AU - Kok, Jasper AU - Feng, Yan AU - Penner, Joyce AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 PB - American Geophysical Union KW - ecosystems KW - bioavailability KW - solution KW - simulation KW - iron KW - feedback KW - spatial distribution KW - size distribution KW - transport KW - sediments KW - ecology KW - geochemistry KW - uncertainty KW - emissions KW - clastic sediments KW - global KW - prediction KW - solubility KW - depth KW - optical properties KW - deposition KW - metals KW - marine environment KW - dust KW - aerosols KW - South Atlantic KW - optical depth KW - particles KW - Atlantic Ocean KW - 02C:Geochemistry of rocks, soils, and sediments KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545409294?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Ito%2C+Akinori%3BKok%2C+Jasper%3BFeng%2C+Yan%3BPenner%2C+Joyce%3BAnonymous&rft.aulast=Ito&rft.aufirst=Akinori&rft.date=2012-01-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Underlying+uncertainty+in+future+projection+of+iron+deposition+to+the+ocean&rft.title=Underlying+uncertainty+in+future+projection+of+iron+deposition+to+the+ocean&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - AOGS-AGU (WPGM) joint assembly N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-11-13 ER - TY - JOUR T1 - Environmental tracers in the Great Artesian Basin; what does it tell us about groundwater flow? AN - 1542640985; 2014-050065 JF - Proceedings - International Association of Hydrogeologists Congress AU - Love, A J AU - Purtschert, R AU - Lu, Z T AU - Fulton, S AU - Shand, P AU - Wohling, D AU - Jiang, W AU - Mueller, P AU - Yang, G M AU - Aeschbach-Hertig, W AU - Broder, L AU - Tosaki, Y AU - Kipfer, R AU - Priestley, S AU - Geuetin-Rousseau, P AU - Keppel, M AU - Crossey, L AU - Karlstrom, K AU - Holysh, Steve AU - Howard, Ken Y1 - 2012 PY - 2012 DA - 2012 SP - 225 PB - [publisher varies], [location varies] VL - 39 KW - isotopes KW - halogens KW - Great Artesian Basin KW - chlorofluorocarbons KW - ground water KW - Ar-39 KW - Kr-85 KW - radioactive isotopes KW - noble gases KW - carbon KW - tracers KW - Finke River basin KW - halogenated hydrocarbons KW - Australia KW - chlorine KW - Dalhousie Springs KW - Australasia KW - Cl-36 KW - potentiometric surface KW - krypton KW - argon KW - aquifers KW - recharge KW - organic compounds KW - hydraulic head KW - C-14 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542640985?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+-+International+Association+of+Hydrogeologists+Congress&rft.atitle=Environmental+tracers+in+the+Great+Artesian+Basin%3B+what+does+it+tell+us+about+groundwater+flow%3F&rft.au=Love%2C+A+J%3BPurtschert%2C+R%3BLu%2C+Z+T%3BFulton%2C+S%3BShand%2C+P%3BWohling%2C+D%3BJiang%2C+W%3BMueller%2C+P%3BYang%2C+G+M%3BAeschbach-Hertig%2C+W%3BBroder%2C+L%3BTosaki%2C+Y%3BKipfer%2C+R%3BPriestley%2C+S%3BGeuetin-Rousseau%2C+P%3BKeppel%2C+M%3BCrossey%2C+L%3BKarlstrom%2C+K%3BHolysh%2C+Steve%3BHoward%2C+Ken&rft.aulast=Love&rft.aufirst=A&rft.date=2012-01-01&rft.volume=39&rft.issue=&rft.spage=225&rft.isbn=&rft.btitle=&rft.title=Proceedings+-+International+Association+of+Hydrogeologists+Congress&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 39th International Association of Hydrogeologists congress N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-07-04 N1 - CODEN - #06122 N1 - SubjectsTermNotLitGenreText - aquifers; Ar-39; argon; Australasia; Australia; C-14; carbon; chlorine; chlorofluorocarbons; Cl-36; Dalhousie Springs; Finke River basin; Great Artesian Basin; ground water; halogenated hydrocarbons; halogens; hydraulic head; isotopes; Kr-85; krypton; noble gases; organic compounds; potentiometric surface; radioactive isotopes; recharge; tracers ER - TY - JOUR T1 - (super 81) Kr-dating is now available AN - 1535203367; 2014-037780 AB - Due to its simple production and transport processes in the terrestrial environment, the long-lived noble-gas isotope (super 81) Kr is the ideal tracer for old water and ice in the age range of 10 (super 5) -10 (super 6) years, a range beyond the reach of (super 14) C. (super 81) Kr-dating, a concept pursued over the past four decades by numerous laboratories employing a variety of techniques, is now available for the first time to the earth science community at large. This is made possible by the development of ATTA-3, an efficient and selective atom counter based on the Atom Trap Trace Analysis method and capable of measuring both (super 81) Kr/Kr and (super 85) Kr/Kr ratios of environmental samples in the range of 10 (super -14) -10 (super -10) . The instrument was calibrated with 12 samples whose (super 85) Kr/Kr ratios were independently measured using Low Level Decay Counting, including six samples that were measured in a blind arrangement. Compared to the previously reported ATTA-2 instrument, the counting rates of ATTA-3 are higher by two orders of magnitude and the required sample size lower by one order of magnitude. For (super 81) Kr-dating in the age range of 200 - 1,500 kyr, the required sample size is 5 - 10 micro-L STP of krypton gas, which can be extracted from approximately 100 - 200 kg of water or 40 - 80 kg of ice. Moreover, a laser-induced quenching scheme was developed to enable measurements of both the rare (super 81,85) Kr and the abundant (super 83) Kr, whose isotopic abundances differ by 11 orders of magnitude. This scheme allows ATTA-3 to directly determine (super 81) Kr/Kr and (super 85) Kr/Kr ratios without other supplemental measurements. Combining the significant reduction in sample size with several advances in the measurement procedure, ATTA-3 represents the state-of-the-art instrument for routine analysis of these rare noble gas tracers for a wide range of earth science applications. More information regarding ATTA-3 is posted at http://www.phy.anl.gov/mep/atta/. JF - Mineralogical Magazine AU - Lu, Z T AU - Jiang, W AU - Sharma, A AU - Bailey, K AU - Mueller, P AU - O'Connor, T P AU - Hu, S M AU - Purtschert, R AU - Sturchio, N C AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 2037 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - water KW - terrestrial environment KW - Quaternary KW - isotopes KW - krypton KW - Holocene KW - Cenozoic KW - Kr-81 KW - radioactive isotopes KW - noble gases KW - ice KW - carbon KW - C-14 KW - 03:Geochronology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535203367?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=%28super+81%29+Kr-dating+is+now+available&rft.au=Lu%2C+Z+T%3BJiang%2C+W%3BSharma%2C+A%3BBailey%2C+K%3BMueller%2C+P%3BO%27Connor%2C+T+P%3BHu%2C+S+M%3BPurtschert%2C+R%3BSturchio%2C+N+C%3BAnonymous&rft.aulast=Lu&rft.aufirst=Z&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=2037&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://minmag.geoscienceworld.org/content/76/6/1965.full.pdf+html http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-06-13 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - C-14; carbon; Cenozoic; Holocene; ice; isotopes; Kr-81; krypton; noble gases; Quaternary; radioactive isotopes; terrestrial environment; water ER - TY - JOUR T1 - Dating old groundwater by multiple tracers including Krypton 81 AN - 1535202732; 2014-037775 AB - The Great Artesian Basin (GAB) of Australia is one of the largest groundwater basins in the world and contains the largest storage of potable groundwater in the Australian continent. Because of its vast size and the potential for large regional flow systems to occur, the GAB has been considered an ideal basin to test emerging groundwater dating techniques such as Cl-36 and He-4. However both of these techniques are subjected to large degrees of uncertainty, as they require a detailed understanding of different sources and sinks of these two isotopes. Contrasting this Kr-81 is considered to be an ideal tracer as it contains only one source, the atmosphere with no or at most minimal sub surface production. Our study area is focused on the western margin of the GAB between the Finke River system in the Northern Territory and the iconic Dalhousie springs in South Australia. This represents the direction of groundwater flow from recharge to discharge through the Dalhousie spring complex. For the first time we have provided a comprehensive suite of analyse not only of Cl-36, He-4, C-14, Ar-39, stable isotopes of the water molecule and noble gases but also, Kr-85 and Kr-81. Our preliminary results indicate a spectrum of "tracer groundwater ages" ranging from modern as indicated by C-14 and Ar-39 up to hundreds of thousands of years as indicated by Kr-81, Cl-36 and He-4. We suggest that this groundwater flow transect may represent an ideal type section for understanding different isotope systematic in order to obtain a greater knowledge of regional groundwater flow. JF - Mineralogical Magazine AU - Love, A J AU - Purtschert, R AU - Lu, Z T AU - Fulton, S AU - Shand, P AU - Jiang, W AU - Mueller, P AU - Yang, G M AU - Wohling, D AU - Aeschbach-Hertig, W AU - Broder, L AU - Kipfer, R AU - Priestley, S AU - Geuetin, P AU - Keppel, M AU - Tosaki, Y AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 2034 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - chlorine KW - Australasia KW - isotopes KW - Cl-36 KW - halogens KW - Northern Territory Australia KW - He-4 KW - krypton KW - hydrochemistry KW - Great Artesian Basin KW - stable isotopes KW - ground water KW - Kr-81 KW - Finke River KW - radioactive isotopes KW - radioactive tracers KW - noble gases KW - helium KW - Australia KW - chemical composition KW - geochemistry KW - 03:Geochronology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535202732?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Dating+old+groundwater+by+multiple+tracers+including+Krypton+81&rft.au=Love%2C+A+J%3BPurtschert%2C+R%3BLu%2C+Z+T%3BFulton%2C+S%3BShand%2C+P%3BJiang%2C+W%3BMueller%2C+P%3BYang%2C+G+M%3BWohling%2C+D%3BAeschbach-Hertig%2C+W%3BBroder%2C+L%3BKipfer%2C+R%3BPriestley%2C+S%3BGeuetin%2C+P%3BKeppel%2C+M%3BTosaki%2C+Y%3BAnonymous&rft.aulast=Love&rft.aufirst=A&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=2034&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://minmag.geoscienceworld.org/content/76/6/1965.full.pdf+html http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-06-13 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - Australasia; Australia; chemical composition; chlorine; Cl-36; Finke River; geochemistry; Great Artesian Basin; ground water; halogens; He-4; helium; hydrochemistry; isotopes; Kr-81; krypton; noble gases; Northern Territory Australia; radioactive isotopes; radioactive tracers; stable isotopes ER - TY - JOUR T1 - Ligand effects on Hg (super II) reduction by magnetite AN - 1524612133; 2014-030941 AB - Abiotic redox transformations of Hg are important in understanding the fate and mobility of Hg in reducing environments. The presence of complexing ligands significantly modifies the reduction potential of Hg (super II) , influencing its abiotic reduction. We tested the ability of magnetite, a biogenic mineral commonly found in subsurface environments, to reduce Hg (super II) complexed with carboxyl, chloride, and sulfhydryl ligands. These ligands are important constituents of subsurface geomedia. Since the binding constants of Hg-chloro complexes fall between -carboxyl and -sulfhydryl complexes, we further investigated the reduction of the Hg-chloride complex by magnetite containing varying Fe (super 2+) stoichiometry (the bulk Fe (super 2+) /Fe (super 3+) ratio, x). Hg (super II) adsorbed to Bacillus subtilis at high and low Hg:biomass ratios (corresponding to Hg complexation predominantly with carboxyl and sulfhydryl groups, respectively) was reacted with magnetite under anoxic conditions, and the solid phase was examined by Hg L (sub III) edge XAS. When Hg (super II) was bound predominantly to carboxyl groups, reduction of Hg (super II) to Hg (super 0) occurred within 2 h and 2 d at pH 6.5 and 5.0, respectively. When Hg (super II) was bound to sulfhydryl groups, it was not reduced by magnetite after 2 months of reaction at pH 6.5 or 5.0. In the presence of chloride, Hg (super II) was rapidly reduced to Hg (super 0) by stoichiometric (x=0.48) magnetite. The reduction of the Hg (super II) -chloride complex by more oxidized forms of magnetite (x=0.38 and 0.28) was kinetically hindered due to the formation of calomel (Hg (super I) (sub 2) Cl (sub 2) ) as a stable intermediate reaction product. However, reaction kinetics slowly progressed towards reduced Hg (super 0) after 4 months of reaction. These results suggest that the complexation of Hg (super II) with carboxyl, chloride, and sulfhydryl exhibits a progressively increased inhibition of the reduction of Hg (super II) to Hg (super 0) by magnetite. Since Hg is typically present in aquatic and terrestrial systems at low concentrations, binding of Hg (super II) to high affinity sulfhydryl sites on bacteria could have important implications for the potential reduction of Hg (super II) to Hg (super 0) and the overall mobility of Hg under Fe-reducing conditions. JF - Mineralogical Magazine AU - Mishra, Bhoopesh AU - Pasakarnis, Timothy AU - Boyanov, Maxim I AU - O'loughlin, Edward J AU - Scherer, Michelle M AU - Kemner, Kenneth M AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - ligands KW - biogenic processes KW - metals KW - bacteria KW - oxides KW - stoichiometry KW - geochemistry KW - Eh KW - mercury KW - magnetite KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524612133?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Ligand+effects+on+Hg+%28super+II%29+reduction+by+magnetite&rft.au=Mishra%2C+Bhoopesh%3BPasakarnis%2C+Timothy%3BBoyanov%2C+Maxim+I%3BO%27loughlin%2C+Edward+J%3BScherer%2C+Michelle+M%3BKemner%2C+Kenneth+M%3BAnonymous&rft.aulast=Mishra&rft.aufirst=Bhoopesh&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 1 N1 - Last updated - 2014-05-15 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - bacteria; biogenic processes; Eh; geochemistry; ligands; magnetite; mercury; metals; oxides; stoichiometry ER - TY - JOUR T1 - Integrating surface complexation modeling with X-ray absorption spectroscopy; current state and future challenges AN - 1524611695; 2014-030940 AB - Surface Complexation Modeling (SCM) of the bulk metal adsorption measurements conducted as a function of metal loading onto biomass provide constraints on the average adsorption reaction stoichiometry, and enable quantification of the stability constants for the important metal-bacterial complexes. However, these measurements do not provide for direct identification of the important site or sites involved in metal binding. Conversely, X-ray Absorption Spectroscopy (XAS) measurements can rigorously identify the important adsorption sites, but are less precise for determining reaction stoichiometry and stability constant values. We use these complementary techniques to elucidate the nature and extent of metal (Cd and Hg) adsorption onto typical Gram-positive and Gram-negative bacterial cell envelops. The bulk metal adsorption measurements indicate that adsorption can be reasonably explained by a 1:1 metal:site reaction stoichiometry over a wide range of metal loading conditions. However, 1:3 and 1:4 metal:site reaction stoichiometry was required to model the adsorption data at sub-ppm metal loading conditions. The SCM and XAS results are consistent with each other, indicating monodentate binding of metals onto both the carboxyl and the phosphoryl sites at higher metal loadings, and multi-dentate binding of metals onto sulfhydryl sites at the lowest metal loadings. The universal adsorption behavior of metal adsorption by biomass proposed by SCM was verified by XAS for bacterial consortium (containing diverse bacterial species) sampled from pristine environments. SCM and XAS have not only shown consistency for studying the metal-bacteria interactions as a function of pH and metal loadings, but also resulted in surprisingly precise match for determining the relative abundance of sulfhydryl sites on different bacterial species. However, SCM approach suffers from significant limitations under geochemical conditions favoring complete sorption of metals onto the biomass. JF - Mineralogical Magazine AU - Mishra, Bhoopesh AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - models KW - methods KW - absorption KW - biomass KW - metals KW - X-ray spectroscopy KW - X-ray analysis KW - stoichiometry KW - spectroscopy KW - geochemistry KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524611695?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Integrating+surface+complexation+modeling+with+X-ray+absorption+spectroscopy%3B+current+state+and+future+challenges&rft.au=Mishra%2C+Bhoopesh%3BAnonymous&rft.aulast=Mishra&rft.aufirst=Bhoopesh&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 2 N1 - Last updated - 2014-05-15 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - absorption; biomass; geochemistry; metals; methods; models; spectroscopy; stoichiometry; X-ray analysis; X-ray spectroscopy ER - TY - JOUR T1 - Characterization of refractory organic substances by NEXAFS using a compact X-ray source AN - 1520104027; 2014-030451 JF - Journal of Soils and Sediments AU - Sedlmair, Julia AU - Gleber, Sophie-Charlotte AU - Peth, Christian AU - Mann, Klaus AU - Niemeyer, Juergen AU - Thieme, Juergen AU - Totsche, Kai Uwe AU - Eusterhues, Karin AU - Rennert, Thilo Y1 - 2012/01// PY - 2012 DA - January 2012 SP - 24 EP - 34 PB - Springer, Heidelberg; Berlin VL - 12 IS - 1 SN - 1439-0108, 1439-0108 KW - soils KW - NEXAFS KW - Luvisols KW - XAFS spectra KW - humic acids KW - organic compounds KW - organic acids KW - humic substances KW - X-ray spectroscopy KW - X-ray analysis KW - Chernozems KW - spectroscopy KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1520104027?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Soils+and+Sediments&rft.atitle=Characterization+of+refractory+organic+substances+by+NEXAFS+using+a+compact+X-ray+source&rft.au=Sedlmair%2C+Julia%3BGleber%2C+Sophie-Charlotte%3BPeth%2C+Christian%3BMann%2C+Klaus%3BNiemeyer%2C+Juergen%3BThieme%2C+Juergen%3BTotsche%2C+Kai+Uwe%3BEusterhues%2C+Karin%3BRennert%2C+Thilo&rft.aulast=Sedlmair&rft.aufirst=Julia&rft.date=2012-01-01&rft.volume=12&rft.issue=1&rft.spage=24&rft.isbn=&rft.btitle=&rft.title=Journal+of+Soils+and+Sediments&rft.issn=14390108&rft_id=info:doi/10.1007%2Fs11368-011-0385-9 L2 - http://link.springer.com/journal/11368 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany N1 - Date revised - 2014-01-01 N1 - Number of references - 62 N1 - Last updated - 2014-08-14 N1 - SubjectsTermNotLitGenreText - Chernozems; humic acids; humic substances; Luvisols; NEXAFS; organic acids; organic compounds; soils; spectroscopy; X-ray analysis; X-ray spectroscopy; XAFS spectra DO - http://dx.doi.org/10.1007/s11368-011-0385-9 ER - TY - JOUR T1 - Interaction of Pb with calcite (104) surface in the presence of EDTA AN - 1507176962; 2014-017452 AB - The incorporation of metals in calcite is important for understanding many geological and environmental processes but is still incompletely understood. Calcite (104) cleavage surfaces were reacted with Pb-EDTA aqueous solution (0.09 mM Pb, 0.11 mM EDTA, 0.5 mM Ca, pH 8.35) at room temperature for times ranging from minutes to hours. Freshly cleaved calcite was placed in a flow-through cell, and reacted first with calcite-saturated solution and then Pb-EDTA solution, both at 0.3 mL/min. In situ synchrotron XR measurements revealed evidence for incorporation of Pb into the calcite lattice as well as the formation of cerrusite (PbCO3) with its (021) plane oriented parallel to calcite (104). The reacted calcite was further studied ex situ by atomic force microscopy (AFM) and optical microscopy. AFM imaging of the reacted surface outside the X-ray beam footprint showed narrow overgrowths atop steps and sparse precipitates on terraces (Fig. 1a). Different behavior was seen within the X-ray beam footprint; it contained abundant trapezoidal-and hexagonal-shaped precipitates oriented mainly along a single crystallographic direction, which is consistent with heteroepitaxial cerussite (021) overgrowths (Figs. 1b and 2). X-ray microfluorescence spectroscopy showed that the trapezoidal growth islands are Pb-rich. Features similar to those in Fig. 1a were observed by AFM in separate ex situ experiments without exposure to X-rays. These observations suggest that the X-ray beam enhanced precipitation even at bulk-undersaturated conditions with respect to cerussite (log SI = -2.3), possibly by photolytic destabilization of the Pb-EDTA2-solution complex. JF - Mineralogical Magazine AU - Callagon, E AU - Lee, S S AU - Fenter, P AU - Nagy, K L AU - Sturchio, N C AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 1538 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - experimental studies KW - lattice KW - lead KW - crystal structure KW - calcite KW - laboratory studies KW - metals KW - crystal chemistry KW - chemical composition KW - cleavage KW - carbonates KW - mineral surface KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1507176962?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Interaction+of+Pb+with+calcite+%28104%29+surface+in+the+presence+of+EDTA&rft.au=Callagon%2C+E%3BLee%2C+S+S%3BFenter%2C+P%3BNagy%2C+K+L%3BSturchio%2C+N+C%3BAnonymous&rft.aulast=Callagon&rft.aufirst=E&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=1538&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://minmag.geoscienceworld.org/content/76/6/1534.full.pdf+html http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Last updated - 2014-03-14 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - calcite; carbonates; chemical composition; cleavage; crystal chemistry; crystal structure; experimental studies; laboratory studies; lattice; lead; metals; mineral surface ER - TY - JOUR T1 - First-principles studies of dissolution reactions of orthoclase AN - 1492584074; 2014-005354 AB - Subcontinuum approaches based on first-principles theory have been successfully applied to a variety of condensed matter problems in the past, including reactivity of glass and mineral surfaces with water, to develop understanding of reaction mechanisms at the atomic scale and provide estimates of reaction rates. To develop atomistic-informed constitutive models for the dissolution rate, we chose to study a well-characterized crystalline aluminosilicate - orthoclase - as initial model system. Time resolved X-ray reflectivity was previously used to obtain the face-specific dissolution rates of orthoclase (001) surfaces under a wide range of pH and temperature conditions. By studying elementary reactions of water and ions on orthoclase using first-principles methods, and combining these studies with Kinetic Monte Carlo (KMC) simulations, our goal is to develop fundamental models to understand the observed experimental dependence of dissolution rates on pH and temperature. We have performed first-principles-based modelling of surface site distribution as a function of pH and temperature on orthoclase surfaces of two different orientations (001) and (010). Differences in the surface species distribution are found for the two surfaces, suggesting different initial dissolution behavior. To evaluate reaction pathways, we have performed first-principles calculations of reaction barriers for water reactions with neutral, protonated and deprotonated sites of constituting network formers Si and Al (Fig. 1). The calculated reaction barriers together with the surface site distribution model are used to estimate the overall dissolution rates and compare with experimental values. Kinetic Monte Carlo studies were used to validate a phenomenological constitutive model. This work is aimed at better understanding of the dissolution behavior and development of predictive models for dissolution rates. JF - Mineralogical Magazine AU - He, Haiying AU - Tan, Xin AU - Fenter, Paul AU - Sturchio, Neil AU - Zapol, Peter AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 2584 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - water KW - silicates KW - solution KW - temperature KW - orthoclase KW - chemical reactions KW - alkali feldspar KW - mineralization KW - framework silicates KW - crystal chemistry KW - feldspar group KW - pH KW - mineral surface KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492584074?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=First-principles+studies+of+dissolution+reactions+of+orthoclase&rft.au=He%2C+Haiying%3BTan%2C+Xin%3BFenter%2C+Paul%3BSturchio%2C+Neil%3BZapol%2C+Peter%3BAnonymous&rft.aulast=He&rft.aufirst=Haiying&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=2584&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://www.minersoc.org/files/Goldschmidt2012_Conference_Abstracts_Z.pdf http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 1 N1 - Last updated - 2014-01-30 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - alkali feldspar; chemical reactions; crystal chemistry; feldspar group; framework silicates; mineral surface; mineralization; orthoclase; pH; silicates; solution; temperature; water ER - TY - JOUR T1 - Reactivity of U (super VI) with pure, oxidized, and Ti-substituted magnetites AN - 1492583949; 2014-005415 AB - Reduction of U (super VI) to U (super IV) through coupled biotic-abiotic processes can significantly decrease uranium mobility in subsurface environments. To understand the abiotic factors contributing to this process, we investigated the reduction of U (super VI) to U (super IV) by magnetite, a common rock forming mineral and product of microbial Fe (super III) respiration. U (super VI) reactivity with pure, stoichiometric magnetite (Fe (super II) Fe (super III) (sub 2) O (sub 4) ,Fe (super 2+) /Fe (super 3+) = 0.5) is compared to that with a series of oxidized (Fe (super 2+) /Fe (super 3+) or = 0.38) reduce U (super VI) to uraninite (U (super IV) O (sub 2) ) nanoparticles, whereas more oxidized magnetites (Fe (super 2+) /Fe (super 3+) < 0.38) adsorb U (super VI) as an inner-sphere complex without transferring electrons. The observed redox reactivity between magnetite and U (super VI) can be correlated with measured reduction potentials for magnetite and with published thermodynamic parameters for U (super IV) /U (super VI) redox couples [3]. Titanomagnetite nanoparticles with Ti formula contents up to x = 0.5 and Fe (super 2+) /Fe (super 3+) ratios between 0.5 and 1.2 can also reduce U (super VI) to U (super IV) . EXAFS spectra indicate that the reduced U (super IV) atoms are not incorporated in uraninite. The speciation of U (super IV) appears to be controlled by Ti-content and not by the Fe (super 2+) /Fe (super 3+) ratio, as the reduction of U (super VI) by partially oxidized x = 0.5 titanomagnetite results in the same non-uraninite U (super IV) species. This work highlights previously unexplored thermodynamic and geochemical factors that may influence the speciation and solubility of uranium in the subsurface. The observation of non-uraninite U (super IV) species in this study, as well as in carbonate and phosphate bearing systems in previous studies [4-6] suggests the need for a better understanding of the stability of reduced U (super IV) . JF - Mineralogical Magazine AU - Latta, Drew E AU - Pearce, Carolyn I AU - Gorski, Christopher A AU - Rosso, Kevin M AU - O'Loughlin, Edward J AU - Kemner, Kenneth K AU - Scherer, Michelle M AU - Boyanov, Maxim I AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 SP - 1978 PB - Mineralogical Society, London VL - 76 IS - 6 SN - 0026-461X, 0026-461X KW - experimental studies KW - oxidation KW - X-ray spectra KW - titanomagnetite KW - XANES spectra KW - laboratory studies KW - reactivity KW - chemical reactions KW - metals KW - EXAFS data KW - oxides KW - uranium KW - spectra KW - reduction KW - nanoparticles KW - geochemistry KW - actinides KW - magnetite KW - 02C:Geochemistry of rocks, soils, and sediments KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1492583949?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Mineralogical+Magazine&rft.atitle=Reactivity+of+U+%28super+VI%29+with+pure%2C+oxidized%2C+and+Ti-substituted+magnetites&rft.au=Latta%2C+Drew+E%3BPearce%2C+Carolyn+I%3BGorski%2C+Christopher+A%3BRosso%2C+Kevin+M%3BO%27Loughlin%2C+Edward+J%3BKemner%2C+Kenneth+K%3BScherer%2C+Michelle+M%3BBoyanov%2C+Maxim+I%3BAnonymous&rft.aulast=Latta&rft.aufirst=Drew&rft.date=2012-01-01&rft.volume=76&rft.issue=6&rft.spage=1978&rft.isbn=&rft.btitle=&rft.title=Mineralogical+Magazine&rft.issn=0026461X&rft_id=info:doi/ L2 - http://www.minersoc.org/files/Goldschmidt2012_Conference_Abstracts_L.pdf http://www.minersoc.org/pages/e_journals/minmag.html LA - English DB - GeoRef N1 - Conference title - Goldschmidt 2012 N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland N1 - Date revised - 2014-01-01 N1 - Number of references - 6 N1 - Last updated - 2014-01-30 N1 - CODEN - MNLMBB N1 - SubjectsTermNotLitGenreText - actinides; chemical reactions; EXAFS data; experimental studies; geochemistry; laboratory studies; magnetite; metals; nanoparticles; oxidation; oxides; reactivity; reduction; spectra; titanomagnetite; uranium; X-ray spectra; XANES spectra ER - TY - JOUR T1 - Laser setup for multi-element RIMS of Genesis returned samples AN - 1469622447; 2013-099620 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Zinovev, A V AU - Baryshev, S V AU - Tripa, E E AU - Veryovkin, I V AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 2911 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - calcium KW - alkaline earth metals KW - magnesium KW - chemical analysis KW - Genesis Mission KW - laser methods KW - sample return KW - solar wind KW - Surface Analysis by Resonance Ionization of Sputtered Atoms instrument KW - mass spectroscopy KW - ions KW - samples KW - iron KW - wavelength KW - SARISA instrument KW - titanium KW - metals KW - aluminum KW - spectroscopy KW - resonance ionization mass spectroscopy KW - instruments KW - chromium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1469622447?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Laser+setup+for+multi-element+RIMS+of+Genesis+returned+samples&rft.au=Zinovev%2C+A+V%3BBaryshev%2C+S+V%3BTripa%2C+E+E%3BVeryovkin%2C+I+V%3BAnonymous&rft.aulast=Zinovev&rft.aufirst=A&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2911.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 4 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Aug. 30, 2012 N1 - Last updated - 2013-12-20 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; aluminum; calcium; chemical analysis; chromium; Genesis Mission; instruments; ions; iron; laser methods; magnesium; mass spectroscopy; metals; resonance ionization mass spectroscopy; sample return; samples; SARISA instrument; solar wind; spectroscopy; Surface Analysis by Resonance Ionization of Sputtered Atoms instrument; titanium; wavelength ER - TY - JOUR T1 - The M5nr: a novel non-redundant database containing protein sequences and annotations from multiple sources and associated tools AN - 1328508741; 17380066 AB - Background: Computing of sequence similarity results is becoming a limiting factor in metagenome analysis. Sequence similarity search results encoded in an open, exchangeable format have the potential to limit the needs for computational reanalysis of these data sets. A prerequisite for sharing of similarity results is a common reference. Description: We introduce a mechanism for automatically maintaining a comprehensive, non-redundant protein database and for creating a quarterly release of this resource. In addition, we present tools for translating similarity searches into many annotation namespaces, e.g. KEGG or NCBI's GenBank. Conclusions: The data and tools we present allow the creation of multiple result sets using a single computation, permitting computational results to be shared between groups for large sequence data sets. JF - BMC Bioinformatics AU - Wilke, Andreas AU - Harrison, Travis AU - Wilkening, Jared AU - Field, Dawn AU - Glass, Elizabeth M AU - Kyrpides, Nikos AU - Mavrommatis, Konstantinos AU - Meyer, Folker AD - Mathematics and Computer Science Division, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL, 60439, USA Y1 - 2012 PY - 2012 DA - 2012 SP - 141 PB - BioMed Central Ltd., Middlesex House London W1T 4LB United Kingdom VL - 13 IS - 1 SN - 1471-2105, 1471-2105 KW - Biotechnology and Bioengineering Abstracts KW - Bioinformatics KW - Computer applications KW - Data processing KW - Databases KW - Limiting factors KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1328508741?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=BMC+Bioinformatics&rft.atitle=The+M5nr%3A+a+novel+non-redundant+database+containing+protein+sequences+and+annotations+from+multiple+sources+and+associated+tools&rft.au=Wilke%2C+Andreas%3BHarrison%2C+Travis%3BWilkening%2C+Jared%3BField%2C+Dawn%3BGlass%2C+Elizabeth+M%3BKyrpides%2C+Nikos%3BMavrommatis%2C+Konstantinos%3BMeyer%2C+Folker&rft.aulast=Wilke&rft.aufirst=Andreas&rft.date=2012-01-01&rft.volume=13&rft.issue=1&rft.spage=141&rft.isbn=&rft.btitle=&rft.title=BMC+Bioinformatics&rft.issn=14712105&rft_id=info:doi/10.1186%2F1471-2105-13-141 L2 - http://www.biomedcentral.com/1471-2105/13/141 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-04-01 N1 - Number of references - 19 N1 - Last updated - 2013-04-19 N1 - SubjectsTermNotLitGenreText - Databases; Data processing; Bioinformatics; Limiting factors; Computer applications DO - http://dx.doi.org/10.1186/1471-2105-13-141 ER - TY - JOUR T1 - SHARP Reactor Performance and Safety Analysis Simulation Suite, invited AN - 1283703352; 17432103 AB - The U.S. Department of Energy's Nuclear Energy Advanced Modeling and Simulation program is developing advanced predictive analysis capabilities. These capabilities are expected to reduce the cost of nuclear reactor system and fuel form design cycles and improve future reactor designs for enhanced safety performance and reduced capital cost. A nuclear reactor modeling and simulation tool suite which realizes this vision, called SHARP(1), is being developed by Argonne National Laboratory in collaboration with Lawrence Livermore National Laboratory, Idaho National Laboratory, Oak Ridge National Laboratory, and other U.S. DOE and university contributors. JF - Transactions of the American Nuclear Society AU - Pointer, W D AU - Anitescu, M AU - Fanning, T H AU - Ferencz, R M AU - Fischer, P F AU - Smith, M A AU - Tautges, T J AD - Argonne National Laboratory: 9700 S Cass Ave., Argonne, IL, 60439, dpointer@anl.gov Y1 - 2012 PY - 2012 DA - 2012 SP - 1013 EP - 1016 PB - American Nuclear Society, Inc. VL - 106 SN - 0003-018X, 0003-018X KW - Health & Safety Science Abstracts KW - USA, Tennessee, Oak Ridge KW - USA, Idaho KW - Nuclear reactors KW - Safety engineering KW - Vision KW - Fuels KW - Nuclear fuels KW - Simulation KW - Nuclear energy KW - Capital costs KW - H 8000:Radiation Safety/Electrical Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1283703352?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ahealthsafetyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Nuclear+Society&rft.atitle=SHARP+Reactor+Performance+and+Safety+Analysis+Simulation+Suite%2C+invited&rft.au=Pointer%2C+W+D%3BAnitescu%2C+M%3BFanning%2C+T+H%3BFerencz%2C+R+M%3BFischer%2C+P+F%3BSmith%2C+M+A%3BTautges%2C+T+J&rft.aulast=Pointer&rft.aufirst=W&rft.date=2012-01-01&rft.volume=106&rft.issue=&rft.spage=1013&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Nuclear+Society&rft.issn=0003018X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Number of references - 14 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Nuclear reactors; Safety engineering; Vision; Fuels; Nuclear fuels; Simulation; Capital costs; Nuclear energy; USA, Tennessee, Oak Ridge; USA, Idaho ER - TY - JOUR T1 - Meteoritic nanodiamond analysis by atom-probe tomography AN - 1282821324; 2013-013180 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Lewis, J B AU - Isheim, D AU - Floss, C AU - Daulton, T L AU - Seidman, D N AU - Heck, P R AU - Davis, A M AU - Pellin, M J AU - Savina, M R AU - Hiller, J AU - Mane, A AU - Elam, J AU - Auciello, O AU - Stephan, T AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 2192 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - tomography KW - stony meteorites KW - isotopes KW - calibration KW - CV chondrites KW - atom probe tomography KW - stable isotopes KW - atom probe KW - Allende Meteorite KW - meteorites KW - quantitative analysis KW - carbon KW - standard materials KW - diamond KW - chondrites KW - synthetic materials KW - nanodiamond KW - chemical analysis KW - isotope ratios KW - C-13/C-12 KW - native elements KW - carbonaceous chondrites KW - focused ion beam KW - microscope methods KW - 05B:Petrology of meteorites and tektites KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282821324?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Meteoritic+nanodiamond+analysis+by+atom-probe+tomography&rft.au=Lewis%2C+J+B%3BIsheim%2C+D%3BFloss%2C+C%3BDaulton%2C+T+L%3BSeidman%2C+D+N%3BHeck%2C+P+R%3BDavis%2C+A+M%3BPellin%2C+M+J%3BSavina%2C+M+R%3BHiller%2C+J%3BMane%2C+A%3BElam%2C+J%3BAuciello%2C+O%3BStephan%2C+T%3BAnonymous&rft.aulast=Lewis&rft.aufirst=J&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2192.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 12 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Nov. 1, 2012 N1 - Last updated - 2013-02-05 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Allende Meteorite; atom probe; atom probe tomography; C-13/C-12; calibration; carbon; carbonaceous chondrites; chemical analysis; chondrites; CV chondrites; diamond; focused ion beam; isotope ratios; isotopes; meteorites; microscope methods; nanodiamond; native elements; quantitative analysis; stable isotopes; standard materials; stony meteorites; synthetic materials; tomography ER - TY - JOUR T1 - Atom-probe tomographic analysis; towards carbon isotope ratios in individual nanodiamonds AN - 1282821321; 2013-013179 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Heck, P R AU - Pellin, M J AU - Davis, A M AU - Isheim, D AU - Seidman, D N AU - Hiller, J AU - Mane, A AU - Elam, J AU - Savina, M R AU - Auciello, O AU - Stephan, T AU - Larson, D J AU - Lewis, J B AU - Floss, C AU - Daulton, T L AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 1790 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - tomography KW - methods KW - stony meteorites KW - isotopes KW - CV chondrites KW - atom probe tomography KW - ions KW - stable isotopes KW - atom probe KW - Allende Meteorite KW - meteorites KW - carbon KW - diamond KW - chondrites KW - synthetic materials KW - nanodiamond KW - chemical analysis KW - isotope ratios KW - native elements KW - carbonaceous chondrites KW - depth KW - microscope methods KW - hydrogen KW - C-13 KW - 05B:Petrology of meteorites and tektites KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282821321?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Atom-probe+tomographic+analysis%3B+towards+carbon+isotope+ratios+in+individual+nanodiamonds&rft.au=Heck%2C+P+R%3BPellin%2C+M+J%3BDavis%2C+A+M%3BIsheim%2C+D%3BSeidman%2C+D+N%3BHiller%2C+J%3BMane%2C+A%3BElam%2C+J%3BSavina%2C+M+R%3BAuciello%2C+O%3BStephan%2C+T%3BLarson%2C+D+J%3BLewis%2C+J+B%3BFloss%2C+C%3BDaulton%2C+T+L%3BAnonymous&rft.aulast=Heck&rft.aufirst=P&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/1790.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 18 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Nov. 1, 2012 N1 - Last updated - 2013-02-05 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - Allende Meteorite; atom probe; atom probe tomography; C-13; carbon; carbonaceous chondrites; chemical analysis; chondrites; CV chondrites; depth; diamond; hydrogen; ions; isotope ratios; isotopes; meteorites; methods; microscope methods; nanodiamond; native elements; stable isotopes; stony meteorites; synthetic materials; tomography ER - TY - JOUR T1 - Development of a resonance ionization method for isotopic analysis of neodymium at trace levels in presolar SiC grains AN - 1282821311; 2013-013176 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Liu, N AU - Savina, M R AU - Davis, A M AU - Shkrob, I AU - Marin, T AU - Pellin, M J AU - Willingham, D G AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 2401 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - methods KW - stony meteorites KW - isotopes KW - carbides KW - stable isotopes KW - Murchison Meteorite KW - meteorites KW - radioactive isotopes KW - silicon carbide KW - presolar grains KW - resonance ionization mass spectra KW - alloys KW - rare earths KW - chondrites KW - chemical analysis KW - precision KW - isotope ratios KW - nucleosynthesis KW - carbonaceous chondrites KW - Nd-144/Nd-143 KW - Nd-144/Nd-142 KW - metals KW - CM chondrites KW - neodymium KW - 05B:Petrology of meteorites and tektites KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282821311?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Development+of+a+resonance+ionization+method+for+isotopic+analysis+of+neodymium+at+trace+levels+in+presolar+SiC+grains&rft.au=Liu%2C+N%3BSavina%2C+M+R%3BDavis%2C+A+M%3BShkrob%2C+I%3BMarin%2C+T%3BPellin%2C+M+J%3BWillingham%2C+D+G%3BAnonymous&rft.aulast=Liu&rft.aufirst=N&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2401.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 11 N1 - PubXState - TX N1 - Document feature - illus. incl. 2 tables N1 - SuppNotes - Accessed on Nov. 1, 2012 N1 - Last updated - 2013-04-19 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alloys; carbides; carbonaceous chondrites; chemical analysis; chondrites; CM chondrites; isotope ratios; isotopes; metals; meteorites; methods; Murchison Meteorite; Nd-144/Nd-142; Nd-144/Nd-143; neodymium; nucleosynthesis; precision; presolar grains; radioactive isotopes; rare earths; resonance ionization mass spectra; silicon carbide; stable isotopes; stony meteorites ER - TY - JOUR T1 - New homogeneous standards by atomic layer deposition for synchrotron X-ray fluorescence and absorption spectroscopies AN - 1282821110; 2013-013194 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Butterworth, A L AU - Becker, N AU - Gainsforth, Z AU - Lanzirotti, A AU - Newville, Matthew AU - Proslier, T AU - Stodolna, Julien AU - Sutton, S R AU - Tyliszczak, T AU - Westphal, A J AU - Zasadzinski, J AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 2666 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - methods KW - chemical analysis KW - X-ray fluorescence KW - Stardust Mission KW - cosmic dust KW - atomic layer deposition KW - standard materials KW - X-ray spectroscopy KW - X-ray analysis KW - synchrotrons KW - spectroscopy KW - interstellar dust KW - particles KW - homogeneous materials KW - 04:Extraterrestrial geology KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282821110?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=New+homogeneous+standards+by+atomic+layer+deposition+for+synchrotron+X-ray+fluorescence+and+absorption+spectroscopies&rft.au=Butterworth%2C+A+L%3BBecker%2C+N%3BGainsforth%2C+Z%3BLanzirotti%2C+A%3BNewville%2C+Matthew%3BProslier%2C+T%3BStodolna%2C+Julien%3BSutton%2C+S+R%3BTyliszczak%2C+T%3BWestphal%2C+A+J%3BZasadzinski%2C+J%3BAnonymous&rft.aulast=Butterworth&rft.aufirst=A&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2666.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 4 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Nov. 2, 2012 N1 - Last updated - 2013-02-05 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - atomic layer deposition; chemical analysis; cosmic dust; homogeneous materials; interstellar dust; methods; particles; spectroscopy; standard materials; Stardust Mission; synchrotrons; X-ray analysis; X-ray fluorescence; X-ray spectroscopy ER - TY - JOUR T1 - Spin crossover equation of state and sound velocities of (Mg (sub 0.65) Fe (sub 0.35) )O ferropericlase to 140 GPa AN - 1270040970; 2013-010362 AB - We have determined the elastic and vibrational properties of periclase-structured (Mg (sub 0.65) Fe (sub 0.35) )O ("FP35"), a composition representative of deep mantle "pyrolite" or chondrite-pyroxenite models, from nuclear resonant inelastic x-ray scattering (NRIXS) and x-ray diffraction (XRD) measurements in diamond-anvil cells at 300 K. Combining with in situ XRD measurements, the Debye sound velocity of FP35 was determined from the low-energy region of the partial phonon density of states (DOS) obtained from NRIXS measurements in the pressure range of 70 to 140 GPa. In order to obtain an accurate description of the equation of state (EOS) for FP35, separate XRD measurements were performed up to 126 GPa at 300 K. A new spin crossover EOS was introduced and applied to the full P-V data set, resulting in a zero-pressure volume V (sub 0) = 77.24 + or - 0.17 Aa (super 3) , bulk modulus K (sub 0) = 159 + or - 8 GPa and its pressure-derivative K' (sub 0) = 4.12 + or - 0.42 for high-spin FP35 and K (sub 0,LS) = 72.9 + or - 1.3 Aa (super 3) , K (sub 0,LS) = 182 + or - 17 GPa with K' (sub 0,LS) fixed to 4 for low-spin FP35. The high-spin to low-spin transition occurs at 64 + or - 3 GPa. Using the spin crossover EOS and Debye sound velocity, we derived the shear (V (sub S) ) and compressional (V (sub P) ) velocities for FP35. Comparing our data with previous results on (Mg,Fe)O at similar pressures, we find that the addition of iron decreases both V (sub P) and V (sub S) , while elevating their ratio (V (sub P) /V (sub S) ). Small amounts (<10%) of low-spin FP35 mixed with silicates could explain moderate reductions in wave speeds near the core mantle boundary (CMB), while a larger amount of FP35 near the CMB would not allow a large structure to maintain neutral buoyancy. JF - Journal of Geophysical Research AU - Chen, Bin AU - Jackson, Jennifer M AU - Sturhahn, Wolfgang AU - Zhang, Dongzhou AU - Zhao, Jiyong AU - Wicks, June K AU - Murphy, Caitlin A Y1 - 2012 PY - 2012 DA - 2012 EP - Citation B08208 PB - American Geophysical Union, Washington, DC VL - 117 IS - B8 SN - 0148-0227, 0148-0227 KW - experimental studies KW - pressure KW - X-ray diffraction data KW - igneous rocks KW - pyrolite KW - mantle KW - elastic constants KW - bulk modulus KW - high pressure KW - ultramafics KW - lower mantle KW - laboratory studies KW - plutonic rocks KW - pyroxenite KW - oxides KW - anvil cells KW - P-T conditions KW - ferropericlase KW - 17B:Geophysics of minerals and rocks UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270040970?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research&rft.atitle=Spin+crossover+equation+of+state+and+sound+velocities+of+%28Mg+%28sub+0.65%29+Fe+%28sub+0.35%29+%29O+ferropericlase+to+140+GPa&rft.au=Chen%2C+Bin%3BJackson%2C+Jennifer+M%3BSturhahn%2C+Wolfgang%3BZhang%2C+Dongzhou%3BZhao%2C+Jiyong%3BWicks%2C+June+K%3BMurphy%2C+Caitlin+A&rft.aulast=Chen&rft.aufirst=Bin&rft.date=2012-01-01&rft.volume=117&rft.issue=B8&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Journal+of+Geophysical+Research&rft.issn=01480227&rft_id=info:doi/10.1029%2F2012JB009162 L2 - http://www.agu.org/journals/jgr/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 32 N1 - PubXState - DC N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - anvil cells; bulk modulus; elastic constants; experimental studies; ferropericlase; high pressure; igneous rocks; laboratory studies; lower mantle; mantle; oxides; P-T conditions; plutonic rocks; pressure; pyrolite; pyroxenite; ultramafics; X-ray diffraction data DO - http://dx.doi.org/10.1029/2012JB009162 ER - TY - JOUR T1 - Controls on iron isotope variations in planetary magmas AN - 1244694820; 2013-006939 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Dauphas, N AU - Roskosz, M AU - Alp, E E AU - Sio, C K AU - Tissot, F L H AU - Neuville, D AU - Hu, M AU - Zhao, J AU - Tissandier, L AU - Medard, E AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 1525 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - silicates KW - nuclear resonant inelastic X-ray scattering KW - magmatic differentiation KW - volcanic rocks KW - stony meteorites KW - isotopes KW - Martian meteorites KW - igneous rocks KW - partial melting KW - mantle KW - olivine group KW - stable isotopes KW - melts KW - iron KW - SNC Meteorites KW - meteorites KW - ferric iron KW - olivine KW - basalts KW - orthosilicates KW - oxides KW - chondrites KW - Eh KW - isotope ratios KW - silicate melts KW - achondrites KW - ferrous iron KW - nesosilicates KW - planets KW - shergottite KW - metals KW - magmas KW - mid-ocean ridge basalts KW - eucrite KW - Fe-56/Fe-54 KW - crust KW - magnetite KW - 05B:Petrology of meteorites and tektites KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1244694820?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Controls+on+iron+isotope+variations+in+planetary+magmas&rft.au=Dauphas%2C+N%3BRoskosz%2C+M%3BAlp%2C+E+E%3BSio%2C+C+K%3BTissot%2C+F+L+H%3BNeuville%2C+D%3BHu%2C+M%3BZhao%2C+J%3BTissandier%2C+L%3BMedard%2C+E%3BAnonymous&rft.aulast=Dauphas&rft.aufirst=N&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/1525.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. N1 - Date revised - 2013-01-01 N1 - Number of references - 16 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on Oct. 24, 2012 N1 - Last updated - 2012-12-27 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - achondrites; basalts; chondrites; crust; Eh; eucrite; Fe-56/Fe-54; ferric iron; ferrous iron; igneous rocks; iron; isotope ratios; isotopes; magmas; magmatic differentiation; magnetite; mantle; Martian meteorites; melts; metals; meteorites; mid-ocean ridge basalts; nesosilicates; nuclear resonant inelastic X-ray scattering; olivine; olivine group; orthosilicates; oxides; partial melting; planets; shergottite; silicate melts; silicates; SNC Meteorites; stable isotopes; stony meteorites; volcanic rocks ER - TY - JOUR T1 - Optimizing luminescent solar concentrator design AN - 1034820184; 17013111 AB - Luminescent Solar Concentrators (LSCs) use fluorescent materials and light guides to convert direct and diffuse sunlight into concentrated wavelength-shifted light that produces electrical power in small photovoltaic (PV) cells with the goal of significantly reducing the cost of solar energy utilization. In this paper we present an optimization analysis based on the implementation of a genetic algorithm (GA) subroutine to a numerical ray-tracing Monte Carlo model of an LSC, SIMSOLAR-P. The initial use of the GA implementation in SIMSOLAR-P is to find the optimal parameters of a hypothetical "perfect luminescent material" that obeys the Kennard Stepanov (K-S) thermodynamic relationship between emission and absorption. The optimization balances the efficiency losses in the wavelength shift and PV conversion with the efficiency losses due to re-scattering of light out of the collector. The theoretical limits of efficiency are provided for one, two and three layer configurations; the results show that a single layer configuration is far from optimal and adding a second layer in the LSC with wavelength shifted material in the near infrared region significantly increases the power output, while the gain in power by adding a third layer is relatively small. The results of this study provide a theoretical upper limit to the performance of an LSC and give guidance for the properties required for luminescent materials, such as quantum nanocrystals, to operate efficiently in planar LSC configurations. JF - Energy & Environmental Science AU - Hernandez-Noyola, Hermilo AU - Potterveld, David H AU - Holt, Roy J AU - Darling, Seth B AD - Argonne National Laboratory; Physics Division; 9700 South Cass Avenue; Argonne; IL; USA; +01-630-252-3903; +01-630-252-4101; , holt@anl.gov Y1 - 2012/01// PY - 2012 DA - Jan 2012 SP - 5798 EP - 5802 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 5 IS - 2 SN - 1754-5692, 1754-5692 KW - Environment Abstracts KW - Monte Carlo simulation KW - Electric power KW - Thermodynamics KW - Solar cells KW - Emissions KW - Absorption KW - Sunlight KW - Solar energy KW - Design KW - ENA 03:Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1034820184?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environmental+Science&rft.atitle=Optimizing+luminescent+solar+concentrator+design&rft.au=Hernandez-Noyola%2C+Hermilo%3BPotterveld%2C+David+H%3BHolt%2C+Roy+J%3BDarling%2C+Seth+B&rft.aulast=Hernandez-Noyola&rft.aufirst=Hermilo&rft.date=2012-01-01&rft.volume=5&rft.issue=2&rft.spage=5798&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environmental+Science&rft.issn=17545692&rft_id=info:doi/10.1039%2Fc1ee02376d LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-08-01 N1 - Number of references - 17 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Monte Carlo simulation; Electric power; Thermodynamics; Solar cells; Absorption; Emissions; Sunlight; Solar energy; Design DO - http://dx.doi.org/10.1039/c1ee02376d ER - TY - JOUR T1 - Developing an index to assess the resilience of critical infrastructure AN - 1034819768; 17048039 AB - In 2009, the US Department of Homeland Security (DHS) began using a targeted questionnaire to produce individual vulnerability-protective-measure values for high-risk critical infrastructures and key resources. As sites continue to be assessed, the topic of resilience is emerging as a necessary focus in risk management and infrastructure protection. Enhancing the resilience of critical infrastructures requires determining the ability of systems to withstand specific threats and return to normal operations after degradation. Thus, comprehensive consideration of all parts of infrastructure systems, from threats to consequences, is needed. The methodology must generate reproducible results that can support decision-making in risk management, disaster response, and business continuity. Argonne National Laboratory, in collaboration with the DHS Protective Security Coordination Division, has developed a comprehensive methodology that uses uniform and consistent data to develop a resilience index (RI). Using the RI to compare similar facilities can provide vital benefits to owners-operators as well as DHS. JF - International Journal of Risk Assessment & Management AU - Petit, Frederic D AU - Eaton, Lori K AU - Fisher, Ronald E AU - McAraw, Sean F AU - Collins, Michael J, III AD - Decision and Information Sciences Division, Argonne National Laboratory, 9700 South Cass Avenue, Bldg. 203, Argonne, Illinois 60439, USA. Y1 - 2012 PY - 2012 DA - 2012 SP - 28 EP - 47 PB - Inderscience Publishers Ltd., PO Box 735 Olney Bucks MK46 5WB United Kingdom VL - 16 IS - 1-2-3 SN - 1466-8297, 1466-8297 KW - Risk Abstracts KW - RISK, SAFETY AND EMERGENCY MANAGEMENT KW - Risk, Reliability and Safety KW - Security and Emergency Management KW - Infrastructure KW - Risk assessment KW - Risk management KW - Security KW - homeland security KW - Degradation KW - Disasters KW - R2 23070:Economics, organization UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1034819768?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Risk+Assessment+%26+Management&rft.atitle=Developing+an+index+to+assess+the+resilience+of+critical+infrastructure&rft.au=Petit%2C+Frederic+D%3BEaton%2C+Lori+K%3BFisher%2C+Ronald+E%3BMcAraw%2C+Sean+F%3BCollins%2C+Michael+J%2C+III&rft.aulast=Petit&rft.aufirst=Frederic&rft.date=2012-01-01&rft.volume=16&rft.issue=1-2-3&rft.spage=28&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Risk+Assessment+%26+Management&rft.issn=14668297&rft_id=info:doi/10.1504%2FIJRAM.2012.047551 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-08-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Risk assessment; Infrastructure; Security; Risk management; homeland security; Degradation; Disasters DO - http://dx.doi.org/10.1504/IJRAM.2012.047551 ER - TY - JOUR T1 - Dual beam sputter depth profiling of Genesis solar wind collectors by RIMS AN - 1033532488; 2012-072855 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Veryovkin, I V AU - Baryshev, S V AU - Burnett, D S AU - Pellin, M J AU - Tripa, C E AU - Zinovev, A V AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 2296 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - calcium KW - alkaline earth metals KW - magnesium KW - Ca-40 KW - Genesis Mission KW - isotopes KW - solar wind KW - Mg-26 KW - data processing KW - Mg-25 KW - mass spectra KW - Mg-24 KW - Cr-52 KW - stable isotopes KW - measurement KW - metals KW - depth profiling KW - spectra KW - dual beam sputtering KW - resonance ionization mass spectroscopy KW - accuracy KW - chromium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1033532488?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Dual+beam+sputter+depth+profiling+of+Genesis+solar+wind+collectors+by+RIMS&rft.au=Veryovkin%2C+I+V%3BBaryshev%2C+S+V%3BBurnett%2C+D+S%3BPellin%2C+M+J%3BTripa%2C+C+E%3BZinovev%2C+A+V%3BAnonymous&rft.aulast=Veryovkin&rft.aufirst=I&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2296.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2012-01-01 N1 - Number of references - 3 N1 - PubXState - TX N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - Accessed on June 8, 2012 N1 - Last updated - 2012-10-18 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - accuracy; alkaline earth metals; Ca-40; calcium; chromium; Cr-52; data processing; depth profiling; dual beam sputtering; Genesis Mission; isotopes; magnesium; mass spectra; measurement; metals; Mg-25; Mg-24; Mg-26; resonance ionization mass spectroscopy; solar wind; spectra; stable isotopes ER - TY - JOUR T1 - Fine structure of near-surface solar wind depth profile by SNMS/SEM imaging AN - 1033532482; 2012-072851 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Baryshev, S V AU - Zinovev, A V AU - Tripa, C E AU - Pellin, M J AU - Burnett, D S AU - Veryovkin, I V AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 2909 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - secondary neutral mass spectroscopy KW - calcium KW - alkaline earth metals KW - magnesium KW - imagery KW - Ca-40 KW - Genesis Mission KW - isotopes KW - solar wind KW - mass spectra KW - Mg-24 KW - Cr-52 KW - silicon KW - stable isotopes KW - depth KW - ultrastructure KW - time-of-flight mass spectroscopy KW - metals KW - depth profiling KW - spectra KW - accuracy KW - SEM data KW - chromium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1033532482?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Fine+structure+of+near-surface+solar+wind+depth+profile+by+SNMS%2FSEM+imaging&rft.au=Baryshev%2C+S+V%3BZinovev%2C+A+V%3BTripa%2C+C+E%3BPellin%2C+M+J%3BBurnett%2C+D+S%3BVeryovkin%2C+I+V%3BAnonymous&rft.aulast=Baryshev&rft.aufirst=S&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2909.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2012-01-01 N1 - Number of references - 8 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 8, 2012 N1 - Last updated - 2012-08-16 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - accuracy; alkaline earth metals; Ca-40; calcium; chromium; Cr-52; depth; depth profiling; Genesis Mission; imagery; isotopes; magnesium; mass spectra; metals; Mg-24; secondary neutral mass spectroscopy; SEM data; silicon; solar wind; spectra; stable isotopes; time-of-flight mass spectroscopy; ultrastructure ER - TY - JOUR T1 - Study of Genesis solar wind samples by laboratory based total reflection X-ray fluorescence spectrometry and synchrotron based grazing incidence X-ray fluorescence AN - 1033532481; 2012-072850 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Schmeling, M AU - Burnett, D S AU - Choi, Y AU - Eng, P J AU - Stubbs, D E AU - Tripa, C E AU - Veryovkin, I V AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 2209 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - calcium KW - alkaline earth metals KW - magnesium KW - Genesis Mission KW - solar wind KW - silicon KW - iron KW - synchrotron radiation KW - laboratory studies KW - sample preparation KW - total reflection X-ray fluorescence KW - metals KW - nickel KW - X-ray fluorescence spectra KW - spectra KW - grazing incidence X-ray fluorescence KW - chromium KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1033532481?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Study+of+Genesis+solar+wind+samples+by+laboratory+based+total+reflection+X-ray+fluorescence+spectrometry+and+synchrotron+based+grazing+incidence+X-ray+fluorescence&rft.au=Schmeling%2C+M%3BBurnett%2C+D+S%3BChoi%2C+Y%3BEng%2C+P+J%3BStubbs%2C+D+E%3BTripa%2C+C+E%3BVeryovkin%2C+I+V%3BAnonymous&rft.aulast=Schmeling&rft.aufirst=M&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2209.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2012-01-01 N1 - Number of references - 6 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 8, 2012 N1 - Last updated - 2012-08-16 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; calcium; chromium; Genesis Mission; grazing incidence X-ray fluorescence; iron; laboratory studies; magnesium; metals; nickel; sample preparation; silicon; solar wind; spectra; synchrotron radiation; total reflection X-ray fluorescence; X-ray fluorescence spectra ER - TY - JOUR T1 - Cleaning Genesis samples with gas cluster ion beams; method evaluation by comparative studies with RIMS, GI-XRF and other surface characterization techniques AN - 1033530533; 2012-072856 JF - Abstracts of Papers Submitted to the Lunar and Planetary Science Conference AU - Veryovkin, I V AU - Baryshev, S V AU - Becker, N G AU - Burnett, D S AU - Choi, Y AU - Eng, P J AU - Stubbs, J E AU - Schmeling, M AU - Toyoda, N AU - Tripa, C E AU - Yamada, I AU - Zinovev, A V AU - Anonymous Y1 - 2012 PY - 2012 DA - 2012 EP - Abstract 2732 PB - Lunar and Planetary Science Conference, Houston, TX VL - 43 KW - methods KW - calcium KW - magnesium KW - Ca-40 KW - irradiation KW - grazing incidence X-ray fluorescence spectroscopy KW - isotopes KW - solar wind KW - Mg-24 KW - ions KW - stable isotopes KW - X-rays KW - X-ray analysis KW - chromium KW - gas cluster ion beams KW - alkaline earth metals KW - experimental studies KW - Genesis Mission KW - X-ray fluorescence KW - mass spectroscopy KW - cleaning methods KW - Cr-52 KW - sample preparation KW - metals KW - spectroscopy KW - resonance ionization mass spectroscopy KW - 04:Extraterrestrial geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1033530533?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.atitle=Cleaning+Genesis+samples+with+gas+cluster+ion+beams%3B+method+evaluation+by+comparative+studies+with+RIMS%2C+GI-XRF+and+other+surface+characterization+techniques&rft.au=Veryovkin%2C+I+V%3BBaryshev%2C+S+V%3BBecker%2C+N+G%3BBurnett%2C+D+S%3BChoi%2C+Y%3BEng%2C+P+J%3BStubbs%2C+J+E%3BSchmeling%2C+M%3BToyoda%2C+N%3BTripa%2C+C+E%3BYamada%2C+I%3BZinovev%2C+A+V%3BAnonymous&rft.aulast=Veryovkin&rft.aufirst=I&rft.date=2012-01-01&rft.volume=43&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+of+Papers+Submitted+to+the+Lunar+and+Planetary+Science+Conference&rft.issn=&rft_id=info:doi/ L2 - http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2732.pdf LA - English DB - GeoRef N1 - Conference title - Forty-third lunar and planetary science conference N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2012-01-01 N1 - Number of references - 3 N1 - PubXState - TX N1 - Document feature - illus. N1 - SuppNotes - Accessed on June 8, 2012 N1 - Last updated - 2012-08-16 N1 - CODEN - #02179 N1 - SubjectsTermNotLitGenreText - alkaline earth metals; Ca-40; calcium; chromium; cleaning methods; Cr-52; experimental studies; gas cluster ion beams; Genesis Mission; grazing incidence X-ray fluorescence spectroscopy; ions; irradiation; isotopes; magnesium; mass spectroscopy; metals; methods; Mg-24; resonance ionization mass spectroscopy; sample preparation; solar wind; spectroscopy; stable isotopes; X-ray analysis; X-ray fluorescence; X-rays ER - TY - JOUR T1 - Combining scanning tunneling microscopy and synchrotron radiation for high-resolution imaging and spectroscopy with chemical, electronic, and magnetic contrast AN - 1008824343; 16085401 AB - The combination of high-brilliance synchrotron radiation with scanning tunneling microscopy opens the path to high-resolution imaging with chemical, electronic, and magnetic contrast. Here, the design and experimental results of an in-situ synchrotron enhanced x-ray scanning tunneling microscope (SXSTM) system are presented. The system is designed to allow monochromatic synchrotron radiation to enter the chamber, illuminating the sample with x-ray radiation, while an insulator-coated tip (metallic tip apex open for tunneling, electron collection) is scanned over the surface. A unique feature of the SXSTM is the STM mount assembly, designed with a two free-flex pivot, providing an angular degree of freedom for the alignment of the tip and sample with respect to the incoming x-ray beam. The system designed successfully demonstrates the ability to resolve atomic-scale corrugations. In addition, experiments with synchrotron x-ray radiation validate the SXSTM system as an accurate analysis technique for the study of local magnetic and chemical properties on sample surfaces. The SXSTM system's capabilities have the potential to broaden and deepen the general understanding of surface phenomena by adding elemental contrast to the high-resolution of STM. JF - Ultramicroscopy AU - Cummings, M L AU - Chien, TY AU - Preissner, C AU - Madhavan, V AU - Diesing, D AU - Bode, M AU - Freeland, J W AU - Rose, V AD - Rice University, Mechanical Engineering and Materials Science Department, Houston, TX 77005, USA, vrose@anl.gov Y1 - 2012/01// PY - 2012 DA - Jan 2012 SP - 22 EP - 31 PB - Elsevier B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 112 IS - 1 SN - 0304-3991, 0304-3991 KW - Environment Abstracts KW - Photoelectron microscopy KW - Scanning tunneling microscopy KW - Synchrotron radiation KW - x-Ray magnetic circular dichroism KW - SXSTM KW - Microscopy KW - chemical properties KW - Tunnels KW - Spectroscopy KW - ENA 14:Radiological Contamination UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1008824343?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ultramicroscopy&rft.atitle=Combining+scanning+tunneling+microscopy+and+synchrotron+radiation+for+high-resolution+imaging+and+spectroscopy+with+chemical%2C+electronic%2C+and+magnetic+contrast&rft.au=Cummings%2C+M+L%3BChien%2C+TY%3BPreissner%2C+C%3BMadhavan%2C+V%3BDiesing%2C+D%3BBode%2C+M%3BFreeland%2C+J+W%3BRose%2C+V&rft.aulast=Cummings&rft.aufirst=M&rft.date=2012-01-01&rft.volume=112&rft.issue=1&rft.spage=22&rft.isbn=&rft.btitle=&rft.title=Ultramicroscopy&rft.issn=03043991&rft_id=info:doi/10.1016%2Fj.ultramic.2011.09.018 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-04-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Microscopy; chemical properties; Spectroscopy; Tunnels DO - http://dx.doi.org/10.1016/j.ultramic.2011.09.018 ER - TY - JOUR T1 - Estimating life-form cover fractions in California sage scrub communities using multispectral remote sensing AN - 1671564312; 16077294 AB - The California sage scrub (CSS) community type in California's Mediterranean-type ecosystems is known for its high biodiversity and is home to a large number of rare, threatened, and endangered species. Because of extensive urban development in the past fifty years, this ecologically significant community type is highly degraded and fragmented. To conserve endangered CSS communities, monitoring internal conditions of communities is as crucial as monitoring distributions of the community type in the region. Vegetation type mapping and field sampling of individual plants provide ecologically meaningful information about CSS communities such as spatial distribution and species compositions, respectively. However, both approaches only provide spatially comprehensive information but no information about internal conditions or vice versa. Therefore, there is a need for monitoring variables which fill the information gap between vegetation type maps and field-based data. A number of field-based studies indicate that life-form fractional cover is an effective indicator of CSS community health and habitat quality for CSS-obligated species. This study investigates the effectiveness of remote sensing approaches for estimating fractional cover of true shrub, subshrub, herb, and bare ground in CSS communities of southern California. Combinations of four types of multispectral imagery ranging from 0.15m resolution scanned color infrared aerial photography to 10m resolution SPOT 5 multispectral imagery and three image processing models - per-pixel, object-based, and spectral mixture models - were tested. An object-based image analysis (OBIA) routine consistently yielded higher accuracy than other image processing methods for estimating all cover types. Life-form cover was reliably predicted, with error magnitudes as low as 2%. Subshrub and herb cover types required finer spatial resolution imagery for more accurate predictions than true shrub and bare ground types. Positioning of sampling grids had a substantial impact on the reliability of accuracy assessment, particularly for cover estimates predicted using multiple endmember spectral mixture analysis (MESMA) applied to SPOT imagery. Of the approaches tested in this study, OBIA using pansharpened QuickBird imagery is one of the most promising approaches because of its high accuracy and processing efficiency and should be tested for more heterogeneous CSS landscapes. MESMA applied to SPOT imagery should also be examined for effectiveness in estimating factional cover over more extensive habitat areas because of its low data cost and potential for conducting retrospective studies of vegetation community conditions. JF - Remote Sensing of Environment AU - Hamada, Yuki AU - Stow, Douglas A AU - Roberts, Dar A AD - Argonne National Laboratory, Argonne, IL 60439, USA yhamada@anl.gov Y1 - 2011/12/15/ PY - 2011 DA - 2011 Dec 15 SP - 3056 EP - 3068 PB - Elsevier B.V., Box 882 New York NY 10159 United States VL - 115 IS - 12 SN - 0034-4257, 0034-4257 KW - Environmental Engineering Abstracts (EN); CSA / ASCE Civil Engineering Abstracts (CE); Aerospace & High Technology Database (AH) KW - Remote sensing KW - Fractional cover KW - Plant life forms KW - Sage scrub communities KW - Mediterranean type ecosystems KW - Ecological integrity KW - Mathematical models KW - Communities KW - Estimating KW - Imagery KW - Vegetation KW - Accuracy KW - Monitoring UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1671564312?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Remote+Sensing+of+Environment&rft.atitle=Estimating+life-form+cover+fractions+in+California+sage+scrub+communities+using+multispectral+remote+sensing&rft.au=Hamada%2C+Yuki%3BStow%2C+Douglas+A%3BRoberts%2C+Dar+A&rft.aulast=Hamada&rft.aufirst=Yuki&rft.date=2011-12-15&rft.volume=115&rft.issue=12&rft.spage=3056&rft.isbn=&rft.btitle=&rft.title=Remote+Sensing+of+Environment&rft.issn=00344257&rft_id=info:doi/10.1016%2Fj.rse.2011.06.008 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-04-01 N1 - Last updated - 2016-05-18 DO - http://dx.doi.org/10.1016/j.rse.2011.06.008 ER - TY - JOUR T1 - Hydrogen release from ammonia borane dissolved in an ionic liquid AN - 963848813; 15938719 AB - Hydrogen release from ammonia borane (AB) dissolved in an ionic liquid (IL) is analyzed using batch, isothermal reaction data. It is found that an Avrami-Erofeyev type model, normally used in solid-gas systems, can be modified for this two-step reaction to describe the measured kinetics of hydrogen release and the observed double peaks in release rates. The kinetic model indicates that temperatures in excess of 200 degree C are needed for complete conversion (release of 2.35 H sub(2-equivalents) in a reasonably compact flow reactor with <20 s AB/IL residence time. A non-isothermal, plug flow reactor model indicates that heat transfer to ethylene glycol at 80 degree C alone is not sufficient to control the peak temperature to <250 degree C in the exothermic decomposition reaction. The peak temperature, however, can be controlled by partial recycling of the spent AB/IL mixture. The reactor can also be operated adiabatically to obtain complete conversion while limiting the peak temperature through recycle. In a flow reactor where the feed stream is heated by mixing with the recycle stream there is a minimum recycle ratio for complete conversion. This minimum recycle ratio is a function of the reactor outlet temperature, which is determined by heat transfer.) JF - International Journal of Hydrogen Energy AU - Ahluwalia, R K AU - Peng, J K AU - Hua, T Q AD - Argonne National Laboratory, Nuclear Engineering, 9700 S Cass Avenue, Argonne, IL 60439, USA, walia@anl.gov Y1 - 2011/12// PY - 2011 DA - December 2011 SP - 15689 EP - 15697 PB - Elsevier B.V. VL - 36 IS - 24 SN - 0360-3199, 0360-3199 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - On-board hydrogen storage KW - Ammonia borane KW - Ionic liquid KW - Fuel cell vehicles KW - Outlets KW - Degradation KW - Residence time KW - Hydrogen KW - Heat Transfer KW - Streams KW - Ethene KW - Ammonia KW - Temperature KW - Model Studies KW - Heat transfer KW - Plug Flow KW - Kinetics KW - Stream KW - Q2 09243:Structure, mechanics and thermodynamics KW - SW 5010:Network design KW - AQ 00006:Sewage UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/963848813?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Journal+of+Hydrogen+Energy&rft.atitle=Hydrogen+release+from+ammonia+borane+dissolved+in+an+ionic+liquid&rft.au=Ahluwalia%2C+R+K%3BPeng%2C+J+K%3BHua%2C+T+Q&rft.aulast=Ahluwalia&rft.aufirst=R&rft.date=2011-12-01&rft.volume=36&rft.issue=24&rft.spage=15689&rft.isbn=&rft.btitle=&rft.title=International+Journal+of+Hydrogen+Energy&rft.issn=03603199&rft_id=info:doi/10.1016%2Fj.ijhydene.2011.09.016 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2015-08-01 N1 - Last updated - 2016-02-04 N1 - SubjectsTermNotLitGenreText - Degradation; Residence time; Ammonia; Stream; Hydrogen; Ethene; Heat transfer; Outlets; Plug Flow; Kinetics; Temperature; Heat Transfer; Streams; Model Studies DO - http://dx.doi.org/10.1016/j.ijhydene.2011.09.016 ER - TY - JOUR T1 - Climate Stability and Policy AN - 920803840; 16170877 JF - Energy & Environment AU - Marsh, Gerald E AD - Argonne National Laboratory (Retired), 5433 East View Park, Chicago, IL 60615 Y1 - 2011/12// PY - 2011 DA - December 2011 SP - 1085 EP - 1090 PB - Multi-Science Publishing Co. Ltd., 107 High St. Brentwood, Essex CM14 4RX United Kingdom VL - 22 IS - 8 SN - 0958-305X, 0958-305X KW - Meteorological & Geoastrophysical Abstracts; Environment Abstracts KW - Climate change KW - Public policy and climate KW - Environmental policy KW - ENA 03:Energy KW - M2 551.5:General (551.5) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/920803840?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvabstractsmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environment&rft.atitle=Climate+Stability+and+Policy&rft.au=Marsh%2C+Gerald+E&rft.aulast=Marsh&rft.aufirst=Gerald&rft.date=2011-12-01&rft.volume=22&rft.issue=8&rft.spage=1085&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environment&rft.issn=0958305X&rft_id=info:doi/10.1260%2F0958-305X.22.8.1085 L2 - http://multi-science.metapress.com/link.asp?target=contribution&;id=R9214R4818485422 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-02-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Public policy and climate; Climate change; Environmental policy DO - http://dx.doi.org/10.1260/0958-305X.22.8.1085 ER - TY - JOUR T1 - Approaching the final frontier in lateral resolution for isotopic and chemical analysis with CHILI AN - 1832615651; 638264-46 AB - The small sizes of samples returned by recent (Stardust, Hayabusa) and future (OSIRIS-REx) sample return missions to comets and asteroids, as well as the small sizes of presolar grains in and interplanetary dust particles (IDPs) are driving improvements in lateral resolution and sensitivity beyond what is available with current state-of-the-art secondary ion mass spectrometry (SIMS) instruments. SIMS lateral resolution has reached nearly equal 50 nm and useful yields are at most a few percent. We are completing construction of CHILI (the CHicago Instrument for Laser Ionization), a resonant ionization mass spectrometry (RIMS) nanobeam instrument designed for isotopic and chemical analysis at the few-nm scale with a useful yield of > or =35% [1]. CHILI is equipped with a COBRA-FIB high resolution liquid metal ion gun (LMIG) and an e-CLIPSE Plus field emission electron gun from Orsay Physics, each of which can be focused to <4 nm. The electron gun will be used for secondary electron imaging, as the built-in optical microscope is diffraction-limited to nearly equal 0.5 mu m. A piezoelectric stage capable of reproducible nm-scale motions and equipped with a sample holder that will accept a wide variety of sample mounts is operational. The flight tube for the time-of-flight mass spectrometer mounted vertically above the sample chamber; this assembly is mounted in the center of an H-shaped laser table equipped with active vibration cancellation devices. The table has been demonstrated to have a vertical vibrational amplitude of less than 0.2 nm. Resonant ionization will be done with six Ti:sapphire tunable solid state lasers pumped with three 40W Nd:YLF lasers, which will allow two to three elements to be analyzed simultaneously. Ion detection in existing RIMS instruments [2,3] is done with a microchannel plate with a single anode. Isotope ratio precision is limited by counting statistics, as no more than one ion of the most abundant isotope of an element can be counted for each pulse. CHILI will initially be equipped with such a detector, but we are developing a multianode detector to significantly improve the count-rate capability. CHILI reflects many recent developments in instrument design, and most technical properties are pushed towards their physical limits. CHILI will be applied to a multitude of cosmochemical problems such as analysis of cometary and contemporary interstellar dust from the Stardust mission, asteroidal dust from the Hayabusa mission, a wide variety of samples from meteorites and IDPs, and, in a few years, asteroidal samples returned by the OSIRIS-REx mission. [1] Stephan et al. (2011) LPS 42, #1995. [2] Savina et al. (2003) GCA 67, 3215. [3] Veryovkin et al. (2008) LPS 39, #2396. JF - American Geophysical Union Fall Meeting AU - Davis, A M AU - Stephan, T AU - Pellin, M AU - Savina, M AU - Yokochi, R AU - Trappitsch, R AU - Liu, N AU - King, A Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract P43A EP - 1653 PB - American Geophysical Union, Washington, DC VL - 2011 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832615651?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Approaching+the+final+frontier+in+lateral+resolution+for+isotopic+and+chemical+analysis+with+CHILI&rft.au=Davis%2C+A+M%3BStephan%2C+T%3BPellin%2C+M%3BSavina%2C+M%3BYokochi%2C+R%3BTrappitsch%2C+R%3BLiu%2C+N%3BKing%2C+A&rft.aulast=Davis&rft.aufirst=A&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - PubXState - DC N1 - Last updated - 2017-01-24 N1 - CODEN - #07548 ER - TY - JOUR T1 - Chromium and iron isotopic composition of presolar silicon carbide stardust grains AN - 1832615573; 638264-40 AB - Most presolar SiC stardust grains derive from Asymptotic Giant Branch (AGB) stars, which are the main source of s-process nuclides in the galaxy. s-Process nucleosynthesis is not a major contributor to iron peak nuclides. The most interesting of these isotopes from an AGB nucleosynthetic standpoint are the trace isotopes (super 54) Cr and (super 58) Fe, which are predicted to have deviations from average Solar System ratios of nearly equal 100ppm and >200ppm, respectively. The other isotopes of Cr and Fe are essentially unchanged by AGB stars, and are representative of the isotopic composition of the protostellar cloud from which the SiC grains formed. They are thus tracers of Galactic Chemical Evolution, and provide a benchmark for the isotopic composition of the galaxy some five to seven billion years ago. SiC grains were isolated from the Murchison meteorite using high purity reagents and techniques specifically designed to prevent contamination with terrestrial Cr and Fe. Grains from the 2-4 mu m size fraction were pressed into a high purity gold foil. Chromium and iron isotopic compositions were measured by Resonance Ionization Mass Spectrometry (RIMS) using new techniques specifically developed for high precision isotopic analysis of iron-peak elements. The Cr isotopic compositions of 19 grains form a distinct group. Several grains had resolvable (>2sigma ) (super 50) Cr and (super 53) Cr deficits ranging as low as -178ppm. The (super 54) Cr/ (super 52) Cr delta -values were all within 2sigma of the Solar System value, though most were slightly higher. The average delta -values for the grains were -45+ or -31ppm for (super 50) Cr, -37+ or -21ppm for (super 53) Cr, and +25+ or -26ppm for (super 54) Cr. Iron results are pending. Given that AGB stars change most Fe and Cr isotope ratios very little, and that these grains' progenitor stars formed from a few hundred million to about three billion years before the Solar System formed (assuming their initial masses were 1.5 - 3 solar masses), and that grain interstellar residence times are likely less than nearly equal 100 - 200 million years, the Fe and Cr isotopes in mainstream grains largely retain the composition of the interstellar medium from about 5 to 7.5 billion years ago. Comparing our data to predictions for Cr synthesis in Type II and Type Ia supernovae (the main producers of Cr) shows deviations from simple mixing lines (assuming appropriate metallicities and initial mass functions). The mixing model predicts greater deficits in (super 50) Cr and/or (super 53) Cr than is seen in the grains. In the case of (super 54) Cr, a 100ppm enhancement due to AGB nucleosynthesis nearly accounts for the deviation from the mixing line. Our work is supported by the NASA Cosmochemistry program, through grants to Argonne National Laboratory and the University of Chicago, and by the US Dept. of Energy, BES-Materials Sciences, under contract DEAC02-06CH11357. JF - American Geophysical Union Fall Meeting AU - Savina, M AU - Levine, J AU - Dauphas, N AU - Pellin, M AU - Willingham, D AU - Stephan, T AU - Trappitsch, R AU - Davis, A M Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract P43A EP - 1647 PB - American Geophysical Union, Washington, DC VL - 2011 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1832615573?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefinprocess&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Chromium+and+iron+isotopic+composition+of+presolar+silicon+carbide+stardust+grains&rft.au=Savina%2C+M%3BLevine%2C+J%3BDauphas%2C+N%3BPellin%2C+M%3BWillingham%2C+D%3BStephan%2C+T%3BTrappitsch%2C+R%3BDavis%2C+A+M&rft.aulast=Savina&rft.aufirst=M&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef in Process, Copyright 2017, American Geosciences Institute. After editing and indexing, this record will be added to Georef. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - PubXState - DC N1 - Last updated - 2017-01-24 N1 - CODEN - #07548 ER - TY - JOUR T1 - Identifying critical ephemeral streams and reducing impacts associated with utility-scale solar energy development in the Southwest United States AN - 1765869297; 2016-015161 AB - The Bureau of Land Management (BLM) and the Department of Energy are preparing a joint programmatic environmental impact statement (PEIS) assessing the potential impacts of utility-scale solar energy development on BLM-administered lands in six southwestern states. One of the alternatives considered in the PEIS involves development within identified solar energy zones (SEZs) that individually cover approximately 10 to 1,000 km (super 2) , located primarily in desert valleys of the Basin and Range physiographic region. Land-disturbing activities in these alluvium-filled valleys have the potential to adversely affect ephemeral streams with respect to their hydrologic, geomorphic, and ecologic functions. Regulation and management of ephemeral streams typically falls under the spectrum of federal, state, and local programs, but scientifically based guidelines for protecting ephemeral streams with respect to land-development activities are largely nonexistent. The PEIS analysis attempts to identify critical ephemeral streams by evaluating the integral functions of flood conveyance, sediment transport, groundwater recharge, and supporting ecological habitats. The initial approach to classifying critical ephemeral streams involved identifying large, erosional features using available flood hazards mapping, historical peak discharges, and aerial photographs. This approach identified ephemeral features not suitable for development (based primarily on the likelihood of damaging floods and debris flows) to address flood conveyance and sediment transport functions of ephemeral streams. Groundwater recharge and the maintenance of riparian vegetation and wildlife habitats are other functions of ephemeral streams. These functions are typically associated with headwater reaches rather than large-scale erosional features. Recognizing that integral functions of ephemeral streams occur over a range of spatial scales and are driven by varying climatic-hydrologic events, the PEIS analysis assesses ephemeral streams according to their position in the basin, stream order, and the recurrence intervals of runoff events in the basin. A key constraint on this approach is the lack of high-resolution hydrologic, geomorphic, and ecological data for ephemeral streams in remote desert basins of the southwest United States. Consultation with stakeholders and management agencies is an additional component to assist with our analysis where data limitations exist. Results from these analyses identify critical ephemeral stream reaches to be avoided during development activities based on a mix of quantitative and qualitative measures. Long-term monitoring of these systems is needed to assess the avoidance criteria and to help advance development of the tools needed to help manage and protect the integral functions of ephemeral stream networks in arid environments. JF - American Geophysical Union Fall Meeting AU - O'Connor, B L AU - Carr, Adrianne AU - Patton, T AU - Hamada, Y AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H53P EP - 07 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - terrestrial environment KW - geologic hazards KW - Basin and Range Province KW - stream sediments KW - mapping KW - erosion features KW - ground water KW - transport KW - conservation KW - sediments KW - floods KW - ecology KW - hydrology KW - North America KW - sediment transport KW - arid environment KW - ephemeral streams KW - Southwestern U.S. KW - solar energy KW - habitat KW - recharge KW - land management KW - natural hazards KW - aerial photography KW - streams KW - geomorphology KW - fluvial environment KW - land use KW - remote sensing KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1765869297?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Identifying+critical+ephemeral+streams+and+reducing+impacts+associated+with+utility-scale+solar+energy+development+in+the+Southwest+United+States&rft.au=O%27Connor%2C+B+L%3BCarr%2C+Adrianne%3BPatton%2C+T%3BHamada%2C+Y%3BAnonymous&rft.aulast=O%27Connor&rft.aufirst=B&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2016-01-01 N1 - PubXState - DC N1 - Last updated - 2016-02-18 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - aerial photography; arid environment; Basin and Range Province; conservation; ecology; ephemeral streams; erosion features; floods; fluvial environment; geologic hazards; geomorphology; ground water; habitat; hydrology; land management; land use; mapping; natural hazards; North America; recharge; remote sensing; sediment transport; sediments; solar energy; Southwestern U.S.; stream sediments; streams; terrestrial environment; transport; United States ER - TY - JOUR T1 - Carbon content of the core through new windows on the Earth's interior AN - 1739087204; 2015-113677 AB - The global carbon cycle may involve iron carbide as a component of the Earth's inner core. Placing constraints on the core's carbon content requires knowledge on the phase stability, density, and sound velocities of relevant iron-carbon alloys under the corresponding pressure and temperature conditions. Recent technological advances have opened new windows on viewing the structure and vibrational properties of iron-rich materials under megabar pressure and high temperature. Here we report new experimental results on the equations-of-state and phonon density-of-states of compressed Fe3C and Fe7C3 under core pressures and elevated temperatures. The measurements use specialized diamond-anvil cell designs and newly developed single-crystal X-ray diffraction (SXD) and nuclear resonant inelastic X-ray scattering (NRIXS) techniques. Our data reveal intriguing behavior of the two carbides under extreme conditions, including pressure-induced magnetic transitions, "invar-like" compressiblity, and significant phonon softening under high temperature. The results bear on the presence and role of carbon in the Earth's core. JF - American Geophysical Union Fall Meeting AU - Li, J AU - Gao, L AU - Chen, B AU - Zhao, J AU - Alp, E E AU - Sturhahn, W AU - Lavina, B AU - Dera, P K AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract MR31A EP - 2197 PB - American Geophysical Union, Washington, DC VL - 2011 KW - Earth KW - pressure KW - iron carbide KW - X-ray diffraction data KW - global KW - stability KW - phase transitions KW - carbides KW - temperature KW - geochemical cycle KW - phonons KW - carbon KW - core KW - alloys KW - carbon cycle KW - anvil cells KW - inner core KW - high temperature KW - 18:Solid-earth geophysics KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739087204?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Carbon+content+of+the+core+through+new+windows+on+the+Earth%27s+interior&rft.au=Li%2C+J%3BGao%2C+L%3BChen%2C+B%3BZhao%2C+J%3BAlp%2C+E+E%3BSturhahn%2C+W%3BLavina%2C+B%3BDera%2C+P+K%3BAnonymous&rft.aulast=Li&rft.aufirst=J&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - alloys; anvil cells; carbides; carbon; carbon cycle; core; Earth; geochemical cycle; global; high temperature; inner core; iron carbide; phase transitions; phonons; pressure; stability; temperature; X-ray diffraction data ER - TY - JOUR T1 - High pressure constraints core formation from X-ray nanoscale tomography AN - 1739087061; 2015-113627 AB - Core-formation represents the most significant differentiation event in Earth's history. Percolation of liquid iron-rich alloy through a crystalline silicate matrix has been suggested as a possible core formation mechanism, especially for the differentiation of planetesimals during the early history of our solar system, since radioactive decay of short-lived isotopes in the small accreting bodies cannot provide enough heat to form extensive melting (i.e. magma ocean). Previous experimental results looking at dihedral angles in silicate metal samples synthetized at elevated pressures and temperatures suggest that percolation is unlikely to be an efficient mechanism in our planet. However, experimental conditions in previous work have been limited in upper mantle conditions (<30GPa). Moreover the measurement of dihedral angles using transmission electron microscopy or backscattered electron microscopy may not generate satisfactory statistics. Nanoscale x-ray computed tomography (nanoXCT) has exciting potential as an accurate probe to study the 3D connectivity and permeability of core forming melts in crystalline silicates. Using a laser-heated diamond anvil cell, experimental conditions over the entire pressure-temperature range in the lower mantle can be accessed. In this study, we compressed and heated the mixture of iron-rich alloy + orthopyroxene, and then used a focused ion beam (FIB) to mill the quenched samples to extract a portion for nano-XCT. Pilot studies from our group using 3D nano XCT have demonstrated the ability to image the detailed morphology of the iron-alloy and silicates, along with details of Fe-FeS eutectic intergrowth patterns, which help to distinguish the relative Fe content in Fe and FeS. Data resulting from the combination of these techniques could improve our understanding of planetary core-forming processes. JF - American Geophysical Union Fall Meeting AU - Shi, Y AU - Mao, W L AU - Zhang, L AU - Yang, W AU - Wang, J AU - Liu, Y AU - Meng, Y AU - Hayter, J A AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract MR21A EP - 2111 PB - American Geophysical Union, Washington, DC VL - 2011 KW - tomography KW - silicates KW - solar system KW - magma oceans KW - Earth KW - planetesimals KW - melts KW - cores KW - computed tomography KW - planetary interiors KW - alloys KW - anvil cells KW - permeability KW - 18:Solid-earth geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739087061?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=High+pressure+constraints+core+formation+from+X-ray+nanoscale+tomography&rft.au=Shi%2C+Y%3BMao%2C+W+L%3BZhang%2C+L%3BYang%2C+W%3BWang%2C+J%3BLiu%2C+Y%3BMeng%2C+Y%3BHayter%2C+J+A%3BAnonymous&rft.aulast=Shi&rft.aufirst=Y&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - alloys; anvil cells; computed tomography; cores; Earth; magma oceans; melts; permeability; planetary interiors; planetesimals; silicates; solar system; tomography ER - TY - JOUR T1 - The nature of the high-pressure ferroic transition in Fe1-xO AN - 1739087043; 2015-113675 AB - The transition metal monoxide Fe1-xO is an archetypal Mott insulator and an important geological compound. Despite considerable study during the past three decades, the origin of the high-pressure cubic-rhombohedral transition in this fundamental material is still not fully understood. We applied a high-pressure nanoscale x-ray diffraction imaging technique to investigate Fe0.94O under pressure. The results reveal non-reflection (110) domain wall structures that form due to the rhombohedral distortion, which suggest the transition is ferroelectric in nature and originates from the defects intrinsic to the material. This conclusion is supported by first-principles density functional theory (DFT) calculations that consider the defects. JF - American Geophysical Union Fall Meeting AU - Ding, Y AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract MR31A EP - 2195 PB - American Geophysical Union, Washington, DC VL - 2011 KW - rhombohedral system KW - distortion KW - electrical properties KW - pressure KW - crystal systems KW - metals KW - phase transitions KW - high pressure KW - iron KW - cubic system KW - ferrous iron KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1739087043?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+nature+of+the+high-pressure+ferroic+transition+in+Fe1-xO&rft.au=Ding%2C+Y%3BAnonymous&rft.aulast=Ding&rft.aufirst=Y&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-12-04 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - crystal systems; cubic system; distortion; electrical properties; ferrous iron; high pressure; iron; metals; phase transitions; pressure; rhombohedral system ER - TY - JOUR T1 - Compressional wave velocity of Fe-Si alloys in Earth's core AN - 1707523978; 2015-082797 AB - The Earth's core is mainly composed of Fe-Ni alloy with a few weight percent candidate light elements (e.g., Si, S, and O). Knowing the elasticity of iron and its alloys is thus critical to understanding the physics and chemistry of the Earth's core. In particular, the alloying effects of light elements on the elasticity of iron are of great importance to establishing satisfactory geophysical and geochemical models of the Earth's core. For example, comparison between compressional wave velocity-density (Vp-rho ) relation of candidate iron-light element alloys and seismic velocity profiles at pressure-temperature (P-T) conditions relevant to the core provides a direct constraint on the composition of the Earth's core. According previous studies, different light elements can have distinct effects on the elasticity of iron under high P-T. It should be noted that high temperatures can also affect the Vp behavior of iron-light element alloys under the pressures. Thus the experimental Vp-rho results of iron alloys at simultaneous high P-T conditions are indispensable to establish a more reasonable composition model of the Earth's core. Here we have measured the Vp-rho relation of Fe-Si alloy under high pressures using in situ high-energy resolution inelastic X-ray scattering (HERIX) and X-ray diffraction in a diamond anvil cell (DAC). Compared with previous Vp studies on iron, these results allow us to derive the alloying effect of silicon on the Vp of hcp-Fe. Our data are also used to critically evaluate seismic and geochemical models of the core, providing new insights into understanding seismic observations and chemical composition of the Earth's inner core. JF - American Geophysical Union Fall Meeting AU - Liu, Jin AU - Lin, J AU - Mao, Zhu AU - Alatas, A AU - Gao, Lili AU - Zhao, J AU - Dubrovinsky, Leonid S AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract MR51B EP - 2168 PB - American Geophysical Union, Washington, DC VL - 2011 KW - elasticity KW - Earth KW - pressure KW - elastic waves KW - silicon KW - high pressure KW - iron KW - models KW - physical properties KW - metals KW - velocity KW - sulfur KW - core KW - alloys KW - seismic waves KW - inner core KW - chemical composition KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707523978?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Compressional+wave+velocity+of+Fe-Si+alloys+in+Earth%27s+core&rft.au=Liu%2C+Jin%3BLin%2C+J%3BMao%2C+Zhu%3BAlatas%2C+A%3BGao%2C+Lili%3BZhao%2C+J%3BDubrovinsky%2C+Leonid+S%3BAnonymous&rft.aulast=Liu&rft.aufirst=Jin&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - alloys; chemical composition; core; Earth; elastic waves; elasticity; high pressure; inner core; iron; metals; models; physical properties; pressure; seismic waves; silicon; sulfur; velocity ER - TY - JOUR T1 - The compression pathway of quartz AN - 1707523851; 2015-082759 AB - The important Earth material quartz may constitute as much as 20% of the upper continental crust. Quartz is composed solely of corner-sharing SiO4 silica tetrahedra, a primary building block of many of the Earth's crustal and mantle minerals, lunar and Martian minerals, and meteoritic minerals. Quartz is therefore an outstanding model material for investigating the response of this fundamental structural unit to changes in P, T, and x. These facts have spawned a vast literature of experimental and theoretical studies of quartz at ambient and non-ambient conditions. Investigations into the behavior of quartz at high pressure have revealed an anomalous distortion in the silicate tetrahedron with pressure not typically seen in other silicates. The tetrahedron assumes a very distinct geometry, becoming more like the Sommerville tetrahedron of O'Keeffe and Hyde (1996) as pressure increases. Traditionally, this distortion has been considered a compression mechanism for quartz, along with Si-O-Si angle-bending and a very small component of bond compression. However, tetrahedral volume decreases by only 1% between 0.59 GPa and 20.25 GPa, while unit cell volume decreases by 21%. Therefore, most of the compression in quartz is happening in tetrahedral voids, not in the silicate tetrahedron, and the distortion of the silicate tetrahedron may not be the direct consequence of decreasing volume in response to increasing pressure. The structure of quartz at high temperature and high pressure, including new structural refinements from synchrotron singe-crystal data collected to 20.25 GPa, is compared to the following three hypothetical quartz crystals: (1) Ideal quartz with perfectly regular tetrahedra and the same volume and Si-O-Si angle as its observed. (2) Model quartz with the same Si-O-Si angle and cell parameters as its observed equivalent, derived from ideal by altering the axial ratio. (3) BCC quartz with a perfectly body-centered cubic arrangement of oxygen anions and the same volume as its observed equivalent. The ideal quartz model presented in this talk verifies the rigid unit mode theory conclusion that there is no intrinsic geometric constraint that forces distortion in the tetrahedron as quartz compresses. A comparison of observed and ideal quartz shows that angle-bending alone compresses ideal quartz as effectively as reducing temperature and increasing pressure in observed quartz. This begs the question: why does the tetrahedron distort with pressure? Comparison of the new experimental data and data recorded in the literature for quartz with these hypothetical crystal structures shows that quartz becomes more ideal as temperature increases, more BCC as pressure increases, and that model quartz is a very good representation of observed quartz under all conditions. This is consistent with the hypothesis that quartz compresses through Si-O-Si angle-bending, which is resisted by anion-anion repulsion resulting in increasing distortion of the c / a axial ratio from ideal as temperature decreases and/or pressure increases. The anomalous tetrahedral distortion observed in quartz as pressure increases should not be considered a compression mechanism, and results from repulsive nonbonded oxygen-oxygen interactions. JF - American Geophysical Union Fall Meeting AU - Dera, P K AU - Thompson, R M AU - Downs, R T AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract MR43A EP - 2123 PB - American Geophysical Union, Washington, DC VL - 2011 KW - silicates KW - pressure KW - oxygen KW - silica minerals KW - mechanism KW - mantle KW - tetrahedra KW - crystal structure KW - bonding KW - silicon KW - high pressure KW - physical properties KW - polyhedra KW - mineral composition KW - quartz KW - framework silicates KW - compression KW - crust KW - 01B:Mineralogy of silicates KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707523851?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+compression+pathway+of+quartz&rft.au=Dera%2C+P+K%3BThompson%2C+R+M%3BDowns%2C+R+T%3BAnonymous&rft.aulast=Dera&rft.aufirst=P&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - bonding; compression; crust; crystal structure; framework silicates; high pressure; mantle; mechanism; mineral composition; oxygen; physical properties; polyhedra; pressure; quartz; silica minerals; silicates; silicon; tetrahedra ER - TY - JOUR T1 - Elasticity of orthoenstatite at high-pressure AN - 1707523759; 2015-082722 AB - Orthoenstatite is an abundant yet complex mineral in Earth's upper mantle. Despite its abundance, the properties of orthopyroxene at high pressure remain ambiguous (e.g., Zhang et al. 2011; Jahn 2008; Kung et al. 2004). We explored select properties of a synthetic powdered orthoenstatite (Mg (sub 0.87) (super 57) Fe (sub 0.13) ) (sub 2) Si (sub 2) O (sub 6) sample by X-ray diffraction (XRD) and nuclear resonance inelastic X-ray scattering (NRIXS) as a function of pressure in a neon pressure medium at 300 K. The XRD measurements were carried out at beamline 12.2.2 of the Advanced Light Source (Berkeley, CA), and the sample was studied up to 34 GPa. NRIXS measurements were carried out at sector 3ID-B of the Advanced Photon Source (Chicago, IL) in the pressure range of 3 to 17 GPa. From the raw NRIXS data, the partial phonon density of states (DOS) was derived (e.g., Sturhahn 2004). The volume (or pressure) dependence of several properties, such as the Lamb-Mossbauer factor, mean force constant, specific heat, vibrational entropy, and vibrational kinetic energy were determined from the DOS. We will discuss our results from these combined studies and the implications for Earth's upper mantle. JF - American Geophysical Union Fall Meeting AU - Zhang, D AU - Jackson, J M AU - Chen, Bin AU - Zhao, J AU - Yan, J AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract MR41A EP - 2095 PB - American Geophysical Union, Washington, DC VL - 2011 KW - silicates KW - upper mantle KW - pressure KW - density KW - X-ray diffraction data KW - entropy KW - specific heat KW - mantle KW - high pressure KW - pyroxene group KW - mineral composition KW - phonons KW - orthopyroxene KW - enstatite KW - chain silicates KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707523759?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Elasticity+of+orthoenstatite+at+high-pressure&rft.au=Zhang%2C+D%3BJackson%2C+J+M%3BChen%2C+Bin%3BZhao%2C+J%3BYan%2C+J%3BAnonymous&rft.aulast=Zhang&rft.aufirst=D&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - chain silicates; density; enstatite; entropy; high pressure; mantle; mineral composition; orthopyroxene; phonons; pressure; pyroxene group; silicates; specific heat; upper mantle; X-ray diffraction data ER - TY - JOUR T1 - Electronic structure of iron in (Mg, Fe)(Si, AO (sub 3) ; glass up to 93 GPa__ AN - 1707523500; 2015-082775 AB - Recent studies have found changes in the electronic spin state of iron in crystalline mantle silicate and oxide phases. However, little is known for the spin state of iron in melts in the mantle. We have measured the Mossbauer spectra of (Mg (sub 0.8) Fe (sub 0.2) )(Si (sub 0.9) Al (sub 0.1) )O (sub 3) glass up to 93 GPa at 300 K in the diamond-anvil cell at Sector 3 of the APS. At ambient conditions, 64% of iron in the glass has a high quadrupole splitting value (QS=2.2 mm/s) consistent with high-spin Fe (super 2+) and 36% has a low QS value (=0.7 mm/s) consistent with high-spin Fe (super 3+) . The ratio of high QS to low QS populations is unchanged by 6 GPa. The population of the low QS site increases rapidly from 34% to 57% between 6 and 32 GPa, followed by a more gradual increase to 68% between 32 and 93 GPa, indicating that 50% of Fe (super 2+) changes from high QS to low QS in the pressure range. According to recent first-principles calculations, low- or intermediate-spin Fe (super 2+) has QS=0.5 approximately 1.5 approximately mm/s which overlaps with the QS of high-spin Fe (super 3+) . Therefore, the increase in the low QS site population can be related to a decrease in the spin moment of 50% of Fe (super 2+) between 6 and 93 GPa. If our findings are applicable for silicate melts, the spin transition in silicate melts may occur over a much wider depth range (200-2500 km) starting at a much shallow depth (200 km) than those in perovskite and ferropericlase in the mantle. JF - American Geophysical Union Fall Meeting AU - Gu, C AU - Catalli, Krystle AU - Grocholski, Brent AU - Shim, S AU - Gao, Lili AU - Alp, E E AU - Evans, W AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract MR43B EP - 2139 PB - American Geophysical Union, Washington, DC VL - 2011 KW - silicates KW - oxidation KW - perovskite KW - mantle KW - phase transitions KW - melts KW - iron KW - crystallinity KW - metals KW - oxides KW - spectra KW - anvil cells KW - Mossbauer spectra KW - ferropericlase KW - 17A:General geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1707523500?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Electronic+structure+of+iron+in+%28Mg%2C+Fe%29%28Si%2C+AO+%28sub+3%29+%3B+glass+up+to+93+GPa__&rft.au=Gu%2C+C%3BCatalli%2C+Krystle%3BGrocholski%2C+Brent%3BShim%2C+S%3BGao%2C+Lili%3BAlp%2C+E+E%3BEvans%2C+W%3BAnonymous&rft.aulast=Gu&rft.aufirst=C&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-08-27 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - anvil cells; crystallinity; ferropericlase; iron; mantle; melts; metals; Mossbauer spectra; oxidation; oxides; perovskite; phase transitions; silicates; spectra ER - TY - JOUR T1 - A jump condition of PMP-based control for PHEVs AN - 1686434695; 15795353 AB - An optimal control strategy based on Pontryagin's Minimum Principle (PMP) is a promising solution because it provides a simple solution for controlling Hybrid Electric Vehicles (HEVs) and guarantees the best performance under reasonable conditions. However, it needs to be very careful when applying the control strategy if inequality state constraints are active because handling the state constraints is one of the difficult issues in optimal control problems. In contrast to HEVs, Plug-in Hybrid Electric Vehicles (PHEVs) possibly consume all of the available electric energy, and so the activation of the state constraint on minimum State of Charge (SOC) is, unfortunately, a very common control problem for PHEVs. This paper describes mathematical derivations for an additional condition necessary for the inequality state constraints and solves the problem with several control options. Whereas PMP-based control allows a unique solution for HEVs. this paper shows that the control idea based on PMP produces a number of alternative solutions for PHEVs. However, battery efficiencies can be considered to evaluate the optimality of each solution, and simulation results from several control options show that maximizing a blended-mode control is the best solution to saving fuel for PHEVs. In terms of performance, the results of applying blended-mode control are very close to those obtained by applying a global optimal solution obtained from Dynamic Programming (DP). JF - Journal of Power Sources AU - Kim, Namwook AU - Rousseau, Aymeric AU - Lee, Daeheung AD - Argonne National Laboratory, 9700 S. Cass Ave., Lemont, IL, USA nwkim21@gmail.com Y1 - 2011/12/01/ PY - 2011 DA - 2011 Dec 01 SP - 10380 EP - 10386 PB - Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands VL - 196 IS - 23 SN - 0378-7753, 0378-7753 KW - Mechanical & Transportation Engineering Abstracts (MT); Environmental Engineering Abstracts (EN); Electronics and Communications Abstracts (EA); CSA / ASCE Civil Engineering Abstracts (CE) KW - Hybrid Electric Vehicles KW - Optimal control KW - Sufficient condition KW - Pontryagin's Minimum Principle KW - State inequality constraint KW - Jump condition KW - Blends KW - Activation energy KW - Strategy KW - Inequalities KW - Hybrid vehicles KW - Optimization KW - Mathematical analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1686434695?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Power+Sources&rft.atitle=A+jump+condition+of+PMP-based+control+for+PHEVs&rft.au=Kim%2C+Namwook%3BRousseau%2C+Aymeric%3BLee%2C+Daeheung&rft.aulast=Kim&rft.aufirst=Namwook&rft.date=2011-12-01&rft.volume=196&rft.issue=23&rft.spage=10380&rft.isbn=&rft.btitle=&rft.title=Journal+of+Power+Sources&rft.issn=03787753&rft_id=info:doi/10.1016%2Fj.jpowsour.2011.07.003 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-03-01 N1 - Last updated - 2016-05-18 DO - http://dx.doi.org/10.1016/j.jpowsour.2011.07.003 ER - TY - JOUR T1 - Characterization of U(VI) reduction in contaminated sediments with slow-degrading electron donor source AN - 1673367222; 2015-034672 AB - In order to select sustainable, high efficiency and cost effective electron donor source, oleate and emulsified vegetable oil (EVO) were tested uranium (VI) reduction in comparison with ethanol in microcosms using uranium contaminated sediments and groundwater from the US DOE Oak Ridge Integrated Field Research Challenge (ORIFRC) site. The effect of initial sulfate concentration on U(VI) reduction was also tested. Both oleate and EVO were effective electron donor sources for U(VI) reduction. Accumulation of acetate as a major product and the removal of aqueous U(VI) were observed and were associated with sulfate reduction. Both oleate and EVO supported U(VI) reduction but at slower rates with a comparable but slightly lower extent of reduction than ethanol. X-ray absorption near-edge spectroscopy (XANES) analysis confirmed reduction of U(VI) to U(IV). The extent of U(VI) reduction in solid phase was negatively influenced by aqueous calcium concentration. The majority of electrons of the three substrates were consumed by sulfate reduction, Fe(III) reduction, and methanogenesis. Initial U(VI) concentration in the aqueous phase increased with increased sulfate concentration (1 versus 5 mM), likely due to U(VI) desorption from the solid phase. At the higher initial sulfate concentration more U(VI) was reduced and fewer electrons were used in methanogenesis. Analysis of bacterial and archeal populations using 16S rRNA gene libraries showed a significant increase in Deltaproteobacteria after biostimulation. The microbial community structures developed with oleate and EVO were significantly distinct from those developed with ethanol. Bacteria similar to Desulforegula spp. was predominant for oleate and EVO degradation but were not observed in ethanol-amended microcosms. Known U(VI)-reducing bacteria in the microcosms amended with the three electron donor sources included iron(III) reducing Geobacter spp. but in lower abundances than sulfate-reducing Desulfovibrio spp. The test results were used for the design a field test by one-time injection of EVO to the subsurface for U(VI) reduction in Area 2 of the ORIFRC site. JF - American Geophysical Union Fall Meeting AU - Wu, W AU - Watson, D B AU - Zhang, G AU - Mehlhorn, T AU - Lowe, K AU - Earles, J AU - Phillips, J AU - Kelly, S D AU - Boyanov, M AU - Kemner, K M AU - Schadt, C AU - Criddle, C S AU - Jardine, P M AU - Brooks, S C AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H21A EP - 1059 PB - American Geophysical Union, Washington, DC VL - 2011 KW - biodegradation KW - Geobacter KW - characterization KW - pollution KW - X-ray spectra KW - iron KW - ground water KW - XANES spectra KW - ethanol KW - organic compounds KW - soil pollution KW - metals KW - Desulfovibrio KW - bacteria KW - sediments KW - alcohols KW - uranium KW - spectra KW - actinides KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1673367222?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterization+of+U%28VI%29+reduction+in+contaminated+sediments+with+slow-degrading+electron+donor+source&rft.au=Wu%2C+W%3BWatson%2C+D+B%3BZhang%2C+G%3BMehlhorn%2C+T%3BLowe%2C+K%3BEarles%2C+J%3BPhillips%2C+J%3BKelly%2C+S+D%3BBoyanov%2C+M%3BKemner%2C+K+M%3BSchadt%2C+C%3BCriddle%2C+C+S%3BJardine%2C+P+M%3BBrooks%2C+S+C%3BAnonymous&rft.aulast=Wu&rft.aufirst=W&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-04-16 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - actinides; alcohols; bacteria; biodegradation; characterization; Desulfovibrio; ethanol; Geobacter; ground water; iron; metals; organic compounds; pollution; sediments; soil pollution; spectra; uranium; X-ray spectra; XANES spectra ER - TY - JOUR T1 - Field- and laboratory-scale evaluation of uranium sequestration; the role of sulfur and iron species AN - 1664439104; 2015-024819 AB - Over the past decade, field and laboratory studies have revealed the critical role of sulfur and iron species in uranium sequestration. Pilot-scale studies of in-situ U(VI) reduction were conducted at a site adjacent to the former S3 ponds (source zone) of the U.S. Department of Energy Oak Ridge Field Research Center, Oak Ridge, TN. The site contains uranium concentrations up to 800 mg/kg in soil and 250 mu M (60 mg/L) in groundwater. In field tests, flushing and pH adjustment decreased aqueous U concentrations by more than 1000 fold from 30-40 to nearly equal 1 mg/L. Ethanol addition stimulated microbial reduction of U(VI) and decreased U concentrations below the U.S. EPA maximum contaminant level for drinking water (30 ppb). U(VI) reduction was concomitant with iron(III)- and sulfate respiration. Spectroscopic analyses indicated sequential changes in the solid-associated uranium: U(VI) initially bound to mineral-surface and organic-bound complexes containing phosphate and carbonate, or as hydroxide and phosphate precipitates, was reduced mainly to a U(IV)-Fe complex. The U(IV) was stable under anaerobic conditions, but partially remobilized upon exposure to oxygen. In separate experiments, nitrate was injected into a reduced region of the subsurface containing previously immobilized U(IV). The nitrate was reduced to nitrite, ammonium, and nitrogen gas; sulfide levels decreased; and Fe(II) levels increased then deceased. Re-reduction of oxidized sediments released Fe(II) and soluble U(VI), suggesting that the decrease in soluble U during reoxidation was due to U(VI) sorption to Fe(III) oxides. Follow-up laboratory studies established that both biotically-generated hydrogen sulfide and soluble ferrous iron species reduce U(VI). For a sulfate-reducing bacterium isolated from the Oak Ridge site, microbially-generated sulfide could explain the observed rate of U(VI) reduction. Laboratory studies established that soluble Fe(II) was able to reduce soluble U(VI) at rapid rates when conditions were thermodynamically favorable, resulting in formation of U(IV)-Fe precipitate. Finally, U(IV) formed by sulfate- and iron-reducing enrichments was evaluated for re-oxidation. In a sulfate-reducing enrichment, oxygen oxidized and mobilized U(IV), but less mobilization occurred in the Fe(III)-reducing enrichment, and the mobilized U(VI) was ultimately removed from solution. In three-year batch microcosm experiments, uranium remained immobilized in re-oxidized sediment at pH 6.5-7 and DO 5-6 mg/L. Addition of nitrate did not mobilize uranium. The results suggest that long-term sequestration of uranium is feasible and may be achievable through sequential reduction and oxidation. JF - American Geophysical Union Fall Meeting AU - Criddle, C S AU - Wu, W AU - Bargar, J R AU - Fendorf, S E AU - Kitanidis, P K AU - Du, X AU - Boonchayaanant, B AU - Luo, J AU - Carley, J AU - Kelly, S D AU - Kemner, K M AU - Brooks, S C AU - Watson, D B AU - Jardine, P M AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H23I EP - 03 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - Oak Ridge National Laboratory KW - water quality KW - monitoring KW - oxidation KW - ammonium ion KW - pollution KW - bioremediation KW - drinking water KW - iron KW - remediation KW - ground water KW - geochemical cycle KW - aquifers KW - models KW - ferric iron KW - metals KW - Tennessee KW - sequential extraction KW - uranium KW - nitrate ion KW - actinides KW - microorganisms KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664439104?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Field-+and+laboratory-scale+evaluation+of+uranium+sequestration%3B+the+role+of+sulfur+and+iron+species&rft.au=Criddle%2C+C+S%3BWu%2C+W%3BBargar%2C+J+R%3BFendorf%2C+S+E%3BKitanidis%2C+P+K%3BDu%2C+X%3BBoonchayaanant%2C+B%3BLuo%2C+J%3BCarley%2C+J%3BKelly%2C+S+D%3BKemner%2C+K+M%3BBrooks%2C+S+C%3BWatson%2C+D+B%3BJardine%2C+P+M%3BAnonymous&rft.aulast=Criddle&rft.aufirst=C&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/H/sessions/H23I/abstracts/H23I-03.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-03-19 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - actinides; ammonium ion; aquifers; bioremediation; drinking water; ferric iron; geochemical cycle; ground water; iron; metals; microorganisms; models; monitoring; nitrate ion; Oak Ridge National Laboratory; oxidation; pollution; remediation; sequential extraction; Tennessee; United States; uranium; water quality ER - TY - JOUR T1 - Investigating the impact of pore scale microenvironments on contaminant biogeochemical reactive transport AN - 1664436499; 2015-024822 AB - Microenvironments and transition zones dominate the subsurface biogeochemical cycling of key contaminants, with strong effects resulting from the coupling of chemical reactions, physical transport and microbiological processes. Understanding the impact of pore-scale environments (e.g. spatial heterogeneity, chemical gradients, and redox potential) is essential for modeling contaminant fate and transport in the subsurface. The driver for biogeochemical processes at the pore scale changes from macroscopic advection to microscale diffusion, and this has a significant effect on the retention of soluble, highly mobile contaminants such as U(VI). Here, etched-silicon microfluidic models with defined chemistry, mineralogy, microbiology, and flow regimes are used for the incremental development of complex microenvironments that approach real-world systems. We demonstrate the colonization of such pore spaces by an anaerobic Fe(III)-reducing bacterium, the enzymatic reduction of a bioavailable Fe(III) phase within this environment, and the subsequent effects of both oxidized and reduced Fe phases on uranium biogeochemistry under flow conditions using both X-ray Microprobe (XMP) and X-ray Absorption Spectroscopy (XAS). Precipitated Fe(III) phases within the microfluidic model were most effectively reduced in the presence of an electron shuttle (e.g. AQDS), with Fe(II) ions adsorbing onto mineral precipitates and surfaces. In the absence of Fe, U(VI) was effectively reduced by the microbial population to insoluble U(IV), which was precipitated in discrete regions associated within biomass. In the presence of both oxidized and reduced Fe phases however, differing effects were observed with regards to U behavior; oxidized U(VI) was frequently adsorbed to poorly crystalline Fe(III), and reduced U(IV) associated with more reduced regions of the microscale flow cell. In the future, the flexibility in the design of the microfluidic models, in combination with advanced characterization techniques, will allow us to further probe a range of pore-structures with distinctive physical, chemical and biological properties to provide a better understanding of biogeochemical redox processes occurring at the pore scale and their impact on contaminant transport. JF - American Geophysical Union Fall Meeting AU - Wilkins, M J AU - Pearce, C AU - Zhang, C AU - Heald, S AU - Fredrickson, J K AU - Zachara, J M AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H23I EP - 07 PB - American Geophysical Union, Washington, DC VL - 2011 KW - pollutants KW - uranyl ion KW - pollution KW - solubility KW - enzymes KW - iron KW - ground water KW - geochemical cycle KW - models KW - ferric iron KW - organic compounds KW - chemical reactions KW - transport KW - metals KW - reactive transport KW - proteins KW - Eh KW - microorganisms KW - diffusivity KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664436499?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Investigating+the+impact+of+pore+scale+microenvironments+on+contaminant+biogeochemical+reactive+transport&rft.au=Wilkins%2C+M+J%3BPearce%2C+C%3BZhang%2C+C%3BHeald%2C+S%3BFredrickson%2C+J+K%3BZachara%2C+J+M%3BAnonymous&rft.aulast=Wilkins&rft.aufirst=M&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/H/sessions/H23I/abstracts/H23I-07.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2011 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-03-19 N1 - CODEN - #07548 N1 - SubjectsTermNotLitGenreText - chemical reactions; diffusivity; Eh; enzymes; ferric iron; geochemical cycle; ground water; iron; metals; microorganisms; models; organic compounds; pollutants; pollution; proteins; reactive transport; solubility; transport; uranyl ion ER - TY - JOUR T1 - Injection of emulsified vegetable oil for long-term bioreduction of uranium AN - 1664436288; 2015-024821 AB - In situ bioremediation of a uranium and nitrate-contaminated aquifer with the slow-release electron donor, emulsified vegetable oil (EVO), was tested at the US DOE Subsurface Biogeochemical Research Program (SBR) Integrated Field Research Challenge (IFRC) site, in Oak Ridge, TN. The EVO injection took place in Area 2 of the IFRC located about 300 m downgradient of the former S-3 disposal ponds. Liquid wastes, disposed in the ponds from 1951 to 1983, were primarily composed of nitric acid, plating wastes containing various metals (Cr, Ni) radionuclides (U, Tc), inorganics (nitrate, sulfate) and organic contaminants (tetrachloroethylene, acetone). Prior pond closure in 1987, large volumes of waste fluids migrated into the subsurface, down Bear Creek Valley and into Bear Creek. Contaminants detected at Area 2 were transported through a high permeability gravelly fill that is considered a preferred transport pathway for U to Bear Creek. Groundwater in the gravelly fill is contaminated with U (1-3 mg/L), sulfate (95-130 mg/L), and nitrate (20-40 mg/L) and 500 mg/kg or higher U has been detected on the solid phase of the fill material. The objective of this study is to investigate the feasibility and long-term sustainability of U(VI) reduction and immobilization, and nitrate degradation in the high permeability, high flow gravel fill using EVO as the electron donor. A one-time EVO injection was conducted over a 2 hour period in the highly permeable gravel (hydraulic conductivity 0.08 cm/sec) in the well instrumented IFRC Area 2 field plot. Extensive monitoring of geochemical parameters, dissolved gases and microbial populations were conducted during the test. A bromide tracer test was conducted prior to the injection of the EVO to assess transport pathways and rates. Geochemical analysis of site groundwater demonstrated the sequential bioreduction of oxygen, nitrate, Mn(IV), Fe(III) and sulfate. Transient accumulation of acetate was observed as an intermediate in the oil degradation. Reduction and removal of U and nitrate from groundwater was observed in all wells in hydraulic connection to the injection wells after 2-4 weeks. U concentrations in groundwater were reduced to below 30 ppb (US EPA drinking water standard) at some well locations and nitrate was reduced to below detectable levels. Rebound of U in groundwater was observed together with the rebound of sulfate concentrations as the EVO was consumed. The flux of U and nitrate contamination from groundwater to the surface water receptor (Bear Creek) was significantly reduced by the EVO injection over a one year period. Uranium (VI) reduction to U(IV) in the field tests was confirmed by X-ray absorption near-edge spectroscopy (XANES) analysis. The reduced U(IV) was determined by X-ray absorption fine structure (XAFS) to be in an Fe-U complex, not uraninite. The activities of major Fe(III)- and sulfate-reducing bacteria with U(VI)-reducing capability as well as methanogens was stimulated after injection of the oil. JF - American Geophysical Union Fall Meeting AU - Brooks, S C AU - Watson, D B AU - Schadt, C W AU - Jardine, P M AU - Gihring, T M AU - Zhang, G AU - Mehlhorn, T AU - Lowe, K AU - Tarver, J R AU - Earles, J AU - Wu, W AU - Criddle, C S AU - Kemner, K M AU - Boyanov, M AU - Anonymous Y1 - 2011/12// PY - 2011 DA - December 2011 SP - Abstract H23I EP - 06 PB - American Geophysical Union, Washington, DC VL - 2011 KW - United States KW - Oak Ridge National Laboratory KW - water quality KW - experimental studies KW - sulfate ion KW - nitric acid KW - degradation KW - in situ KW - oxidation KW - injection KW - pollution KW - bioremediation KW - drinking water KW - remediation KW - ground water KW - aquifers KW - vegetable oil KW - organic compounds KW - Tennessee KW - nitrate ion KW - inorganic acids KW - permeability KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1664436288?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Injection+of+emulsified+vegetable+oil+for+long-term+bioreduction+of+uranium&rft.au=Brooks%2C+S+C%3BWatson%2C+D+B%3BSchadt%2C+C+W%3BJardine%2C+P+M%3BGihring%2C+T+M%3BZhang%2C+G%3BMehlhorn%2C+T%3BLowe%2C+K%3BTarver%2C+J+R%3BEarles%2C+J%3BWu%2C+W%3BCriddle%2C+C+S%3BKemner%2C+K+M%3BBoyanov%2C+M%3BAnonymous&rft.aulast=Brooks&rft.aufirst=S&rft.date=2011-12-01&rft.volume=2011&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2011/FM/sections/H/sessions/H23I/abstracts/H23I-06.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Unio