Results 71 to 80 of about 139,399 (305)

Quantitative determination of elemental sulfur at the arsenopyrite surface after oxidation by ferric iron: mechanistic implications

Geochemical Transactions, 2001
The elemental sulfur formed at the arsenopyrite surface after oxidation by ferric iron was quantitatively measured by extraction in perchloroethylene and subsequent quantitative analysis by HPLC.
Hamers Robert J, Banfield Jillian F, McGuire Molly M   +2 more
doaj   +1 more source

Large sulfur isotope fractionations in Martian sediments at Gale crater [PDF]

, 2017
Variability in the sulfur isotopic composition in sediments can reflect atmospheric, geologic and biological processes. Evidence for ancient fluvio-lacustrine environments at Gale crater on Mars and a lack of efficient crustal recycling mechanisms on the
AS Yen, C Freissinet, CK Shearer, DL Eldridge, DT Vaniman, F-Y Leung, GR Osinski, H Ohmoto, HB Franz, HB Franz, HB Franz, I Halevy, IN Bindeman, J Farquhar, J Farquhar, J Parnell, J Savarino, JP Greenwood, JP Greenwood, JP Greenwood, JP Grotzinger, KA Farley, KM Stack, M Nachon, O Abramov, RRI Seal, S Chakraborty, SA Benner, SP Schwenzer, SP Schwenzer, SS Johnson, T Ding   +31 more
core   +1 more source

Sulfurization of H-Phosphonate Diesters by Elemental Sulfur under Aqueous Conditions [PDF]

ACS Omega, 2017
To assess the plausibility of prebiotic nucleic acid polymerization by a sequential phosphitylation-sulfurization mechanism, the rates of hydrolysis and sulfurization of bis(2',3'-O-methyleneadenosin-5'-yl)-H-phosphonate, a dinucleoside H-phosphonate diester, have been determined over a wide pH range (0.52-7.25) and in the presence of varying amounts ...
openaire   +3 more sources

Heteroatom‐Engineering Promoted Co9S8 Bi‐functional Electrocatalyst for Hydrazine‐Assisted Hydrogen Production at Industrial Current Density

Advanced Functional Materials, EarlyView.
Fe and P co‐doped Co9S8 nanocorals (Fe, P‐Co9S8) are successfully synthesized by a heteroatom engineering strategy, which exhibit outstanding bifunctional electrocatalytic performance for both the hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR).
Yuying Meng, Chunyan Xiang, Wenbiao Zhang, Dahai Zeng, Bing Du, Bao Zhong, Yue Jiang, Damien Voiry, Qingsheng Gao   +8 more
wiley   +1 more source

The effect of different sulfur doses and forms on changes of soil heavy metals

Plant, Soil and Environment, 2012
A three-year field experiment was conducted in North-East Poland. Each year three sulfur fertilization rates in the form of sulphate (S-SO42-) and pure (S-S0) sulfur were applied: 40, 80, and 120 kg/ha.
M. Skwierawska, L. Zawartka, A. Skwierawski, A. Nogalska   +3 more
doaj   +1 more source

Molecular tracers of PDR-dominated galaxies [PDF]

, 2009
Photon-dominated regions (PDRs) are powerful molecular line emitters in external galaxies. They are expected in galaxies with high rates of massive star formation due to either starburst (SB) events or starburst coupled with active galactic nuclei (AGN ...
Bayet, Bayet, Chieffi, D. A. Williams, E. Bayet, Evans, Gao, García-Burillo, Gerin, Graciá-Carpio, Habing, Heger, Imanishi, Israel, J. M. C. Rawlings, Knauth, Knudsen, Kohno, Kohno, Krips, Krips, Lintott, Martín, Martín, Meyer, Origlia, Papadopoulos, Riechers, S. Viti, Sakamoto, Snow, Sofia, Solomon, Sosa-Brito, T. Bell, Umeda, Wagg, Wu   +37 more
core   +2 more sources

Three‐Dimensional Hierarchical Nanowire‐Networks with Deep‐Focus Tolerance and Adhesion Robustness for Harsh‐Environment SERS Sensing

Advanced Functional Materials, EarlyView.
A 3D nanowire‐network SERS substrate with robust adhesion is developed, featuring pronounced z‐direction optical activity, ultralow detection limit (1.5 × 10−13 M), and excellent signal uniformity (RSD < 10%). Enabled by enhanced light scattering, increased optical density of states, and structural reinforcement, the substrate demonstrates stable, high‐
Jinglai Duan, Wentao Wang, Xiu Liang, Yongliang Zhang, Jie Liu, Yu Bai, Dangyuan Lei   +6 more
wiley   +1 more source

Sulfur, Chlorine, & Argon Abundances in Planetary Nebulae. I: Observations and Abundances in a Northern Sample

, 2001
This paper is the first of a series specifically studying the abundances of sulfur, chlorine, and argon in Type II planetary nebulae (PNe) in the Galactic disk.
Aldrovandi S. M. V., Barker T., Barker T., Bhatia A. K., Burke V. M., Butler K., Butler K., Cappellaro E., Clegg R., Dennefeld M., Freitas-Pacheco J. A., Galavis M. E., K. B. Kwitter, Kingsburgh R. L., Koppen J. A., Lennon D. J., Maciel W. J., Maciel W. J., Maciel W. J., Maeder A., Marigo P., Mendoza C., Mendoza C., Pagel B. E. J., Peimbert M., Peimbert M., Peimbert M., Pequignot D., R. B. C. Henry, Seaton M. J., Stasinska G., Stasinska G., Stevenson C. C., Storey P. J., Zeippen C. J.   +34 more
core   +1 more source

Dual‐Interface‐Dominant Cathode Architectures Enabling Fast Sulfur Redox and Stable Interfaces in All‐Solid‐State Li‐S Batteries

Advanced Functional Materials, EarlyView.
An optimized carbon host nanostructure enables a dual‐interface‐dominant architecture in sulfur cathodes of solid‐state Li‐S batteries by selectively forming sulfur|carbon and sulfur|solid electrolyte interfaces. This tailored interfacial configuration accelerates sulfur redox kinetics by establishing enriched Li+/e– transport networks, while ...
Zhao Yang, Yuxiao Zhang, Yihong Liu, Geng Xie, Yu Dou, Jeremy Dawkins, Lijia Liu, Yixiang Wang, Lingzi Sang, Mohsen Shakouri, Sixu Deng, Karim Zaghib, Tsun‐Kong Sham, Xia Li   +13 more
wiley   +1 more source

Isolation of a putative sulfur comproportionating microorganism

Scientific Reports
Sulfur comproportionation, the coupled oxidation of sulfide and reduction of sulfate to elemental sulfur, is a heretofore undiscovered microbial catabolism that has been predicted based on thermodynamic calculations.
Heidi S. Aronson, Douglas E. LaRowe, Jennifer L. Macalady, Jan P. Amend   +3 more
doaj   +1 more source