Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Khoren, Avetisyan"'
Autor:
Khoren Avetisyan, Alexey Kamyshny
Publikováno v:
Geochimica et Cosmochimica Acta. 325:205-213
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b37510a142be7b51bbf61d6fba6b7950
https://doi.org/10.1016/j.gca.2022.02.031
https://doi.org/10.1016/j.gca.2022.02.031
Publikováno v:
Geochimica et Cosmochimica Acta. 313:21-37
Formation rates for various products of hydrogen sulfide oxidation by δ-MnO2 were studied as a function of pH, temperature, concentration of the reactants, and ionic strength at the environmentally-relevant conditions. The main goals of this work we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d168efda1f501ac698a085e3f0749f7a
https://doi.org/10.1016/j.gca.2021.08.022
https://doi.org/10.1016/j.gca.2021.08.022
Publikováno v:
Goldschmidt2022 abstracts.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8a9bb7f4be38defb2cd7affc782f461
https://doi.org/10.46427/gold2022.12388
https://doi.org/10.46427/gold2022.12388
Autor:
Alexey Kamyshny, Valeria Boyko, Khoren Avetisyan, Alyssa Findlay, Qingjun Guo, Xi Yang, Andre Pellerin
Publikováno v:
Goldschmidt2022 abstracts.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5832148009d97b9f54ddf53563f484d
https://doi.org/10.46427/gold2022.10481
https://doi.org/10.46427/gold2022.10481
Publikováno v:
Isotopes in environmental and health studies. 57(5)
Lake Sevan is a meso-eutrophic water body, which was severely impacted by anthropogenic level decrease, pollution and eutrophication during the last century. Starting in the 1970s, these processes resulted in the formation of an oxygen-depleted hypol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24d4c7cba9db1172591c64f042fa0f46
https://pubmed.ncbi.nlm.nih.gov/34519245
https://pubmed.ncbi.nlm.nih.gov/34519245
Publikováno v:
Geochimica et Cosmochimica Acta, 247 . pp. 96-105.
A detailed study of kinetics of reaction between hydrogen sulfide and orthorhombic cyclooctasulfur at environmentally relevant conditions, which results in formation of inorganic polysulfides, was performed. Rates of reaction were measured as a funct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3ecf9999ad793a4b3d9c2baa2ee2322
https://doi.org/10.1016/j.gca.2018.12.030
https://doi.org/10.1016/j.gca.2018.12.030
Autor:
André Pellerin, Alexey Kamyshny, Qingjun Guo, Khoren Avetisyan, Alyssa Findlay, Valeria Boyko, Xi Yang
Publikováno v:
Boyko, V, Avetisyan, K, Findlay, A, Guo, Q, Yang, X, Pellerin, A & Kamyshny, A 2021, ' Biogeochemical cycling of sulfur, manganese and iron in ferruginous limnic analog of Archean ocean ', Geochimica et Cosmochimica Acta, vol. 296, pp. 56-74 . https://doi.org/10.1016/j.gca.2020.12.020
The early evolution of life on Earth was intimately coupled with the evolution of ocean chemical composition and redox conditions in Archean ocean. However, the measurements of chemical and isotopic compositions of Archean sedimentary rocks does not
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3475d14d31e78cd6a9ed4a08485ff261
https://pure.au.dk/portal/da/publications/biogeochemical-cycling-of-sulfur-manganese-and-iron-in-ferruginous-limnic-analog-of-archean-ocean(2b3a4e99-5fe1-4938-a8e9-a5550267e651).html
https://pure.au.dk/portal/da/publications/biogeochemical-cycling-of-sulfur-manganese-and-iron-in-ferruginous-limnic-analog-of-archean-ocean(2b3a4e99-5fe1-4938-a8e9-a5550267e651).html
Autor:
Xi, Yang, Qingjun, Guo, Valeria, Boyko, Khoren, Avetisyan, Alyssa J, Findlay, Fang, Huang, Zhongliang, Wang, Zhenwu, Chen
Publikováno v:
Science of The Total Environment. 817:152609
The chemical composition and redox conditions of the Precambrian ocean are key factors for reconstructing the temporal evolution of atmospheric oxygen through time. In particular, the isotopic composition of iron are useful proxies for reconstructing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b2d7b505a47aa1abc094309cd4db1f6
https://doi.org/10.1016/j.scitotenv.2021.152609
https://doi.org/10.1016/j.scitotenv.2021.152609
Autor:
Qingjun Guo, Alyssa Findlay, Xi Yang, Alexey Kamyshny, Khoren Avetisyan, André Pellerin, Valeria Boyko
Publikováno v:
Geology
Findlay, A J, Boyko, V, Pellerin, A, Ayetisyan, K, Guo, Q, Yang, X & Kamyshny, A 2019, ' Sulfide oxidation affects the preservation of sulfur isotope signals ', Geology, vol. 47, no. 8, pp. 739-743 . https://doi.org/10.1130/G46153.1
Findlay, A J, Boyko, V, Pellerin, A, Ayetisyan, K, Guo, Q, Yang, X & Kamyshny, A 2019, ' Sulfide oxidation affects the preservation of sulfur isotope signals ', Geology, vol. 47, no. 8, pp. 739-743 . https://doi.org/10.1130/G46153.1
The accumulation of oxygen in Earth’s atmosphere and oceans in the late Archean had profound implications for the planet’s biogeochemical evolution. Oxygen impacts sulfur cycling through the oxidation of sulfide minerals and the production of sul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fac2f54456ab6c9465e9963718cc7982
Publikováno v:
Avetisyan, K, Eckert, W, Findlay, A J & Kamyshny, A 2019, ' Diurnal variations in sulfur transformations at the chemocline of a stratified freshwater lake ', Biogeochemistry, vol. 146, no. 1, pp. 83-100 . https://doi.org/10.1007/s10533-019-00601-5
In order to characterize biogeochemical sulfur cycling in the metalimnion of a thermally stratified freshwater lake, we followed changes in the concentrations and isotopic composition of sulfur species during a 24-h period, during which the chemoclin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c671e266c5242067501cfe5188d761b
https://pure.au.dk/portal/da/publications/diurnal-variations-in-sulfur-transformations-at-the-chemocline-of-a-stratified-freshwater-lake(a24814f4-a5b2-4266-8fff-028275c1009b).html
https://pure.au.dk/portal/da/publications/diurnal-variations-in-sulfur-transformations-at-the-chemocline-of-a-stratified-freshwater-lake(a24814f4-a5b2-4266-8fff-028275c1009b).html