Results 21 to 30 of about 20,788 (267)

Tetrathionate and Elemental Sulfur Shape the Isotope Composition of Sulfate in Acid Mine Drainage

Frontiers in Microbiology, 2017
Sulfur compounds in intermediate valence states, for example elemental sulfur, thiosulfate, and tetrathionate, are important players in the biogeochemical sulfur cycle.
Nurgul Balci, Benjamin Brunner, Benjamin Brunner, Alexandra V. Turchyn   +3 more
doaj   +1 more source

Fractionation of Sulfur Isotopes during Oxidation [PDF]

Bulletin of the Chemical Society of Japan, 1958
The fractionation process of sulfur isotopes during oxidation and the distribution of sulfur isotopes in nature using sulfur-35 as a tracer were examined. Zinc sulfide labeled with S/sup 35/ was prepared from hydrogen sulfide and zinc acetate, and about 1/10 of the total was oxidized to the sulfur.
Iwaji Iwasaki, Hiroshi Fukutomi, Hikaru Shimojima   +2 more
openaire   +1 more source

Sulfur isotope fractionation during incorporation of sulfur nucleophiles into organic compounds [PDF]

Chemical Communications, 2008
(34)S enrichment is shown to occur during sulfurization reactions and for the first time conclusively attributed to an isotope equilibrium effect rather than selective addition of (34)S enriched nucleophiles.
Amrani, Alon, Ma, Qisheng, Ahmad, Ward Said, Aizenshtat, Zeev, Tang, Yongchung   +4 more
openaire   +3 more sources

Sulfur Isotope Effects of Dissimilatory Sulfite Reductase

Frontiers in Microbiology, 2015
The precise interpretation of environmental sulfur isotope records requires a quantitative understanding of the biochemical controls on sulfur isotope fractionation by the principle isotope-fractionating process within the S cycle, microbial sulfate ...
William D. Leavitt, William D. Leavitt, Alexander S. Bradley, Alexander S. Bradley, André A. Santos, Inês A. Cardoso Pereira, David Thomas Johnston   +6 more
doaj   +1 more source

Sulfur Stable Isotope Discrimination in Rice: A Sulfur Isotope Mass Balance Study

Frontiers in Plant Science, 2022
The use of sulfur (S) stable isotopes to study S metabolism in plants is still limited by the relatively small number of studies. It is generally accepted that less S stable isotope discrimination occurs during sulfate (SO42–) uptake.
Viviana Cavallaro, Moez Maghrebi, Moez Maghrebi, Mariachiara Caschetto, Mariachiara Caschetto, Gian Attilio Sacchi, Fabio Francesco Nocito   +6 more
doaj   +1 more source

Sulphur and Carbon Isotopes as Tracers of Past Sub-seafloor Microbial Activity [PDF]

, 2019
Microbial life below the seafloor has changed over geological time, but these changes are often not obvious, as they are not recorded in the sediment.
Brunner, Benjamin, Böttcher, Michael E., Jørgensen, Bo Barker, Meister, Patrick, Picard, Aude   +4 more
core   +3 more sources

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   +2 more sources

Fractionation of sulfur isotopes by Desulfovibrio vulgaris mutants lacking hydrogenases or type I tetraheme cytochrome c3

Frontiers in Microbiology, 2013
The sulfur isotope effect produced by sulfate reducing microbes is commonly used to trace biogeochemical cycles of sulfur and carbon in aquatic and sedimentary environments.
Min Sub eSim, Min Sub eSim, David T Wang, Grant M Zane, Judy D Wall, Tanja eBosak, Shuhei eOno   +6 more
doaj   +1 more source

Sulphur-isotope compositions of pig tissues from a controlled feeding study [PDF]

, 2017
Sulphur-isotope determinations are becoming increasingly useful for palaeodietary reconstruction, but knowledge of isotopic discrimination between diet and various tissues remains inadequate. In this study, we explore the sensitivity of δ34Stissue values
Evershed, Richard P., Lewis, Jamie, Miller, Bevis, Newton, Jason, Stewart, Alan, Tarlton, John F., Webb, Emily C.   +6 more
core   +2 more sources

U mobilization and associated U isotope fractionation by sulfur-oxidizing bacteria

Frontiers in Microbiology, 2023
Uranium (U) contamination of the environment causes high risk to health, demanding for effective and sustainable remediation. Bioremediation via microbial reduction of soluble U(VI) is generating high fractions (>50%) of insoluble non-crystalline U(IV)
C. D. Rosendahl, Y. Roebbert, A. Schippers, S. Weyer   +3 more
doaj   +1 more source