Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Alexander A. Ignatiev"'
Publikováno v:
Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki, Vol 20, Iss 4, Pp 520-524 (2020)
Subject of Research. The paper presents the study of spectral-luminescent characteristics of erbium ions in bromidefluoride photo-thermo-refractive glasses with 0.1 mol% of erbium oxide and 1-2 mol% of ytterbium oxide concentration. Such spectroscopi
Externí odkaz:
https://doaj.org/article/66e3934e63ad4b4c9cdde082568a6cb4
Publikováno v:
Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki, Vol 16, Iss 6, Pp 1031-1037 (2016)
Subject of Study.The paper deals with novel research of ion exchange duration influence on spectral-luminescent properties of silver clusters formed in photo-thermo-refractive glass. Method. Photo-thermo-refractive matrix glass based on Na2O–Al2O3
Externí odkaz:
https://doaj.org/article/c1458991993942bebca4fb91c4ab1424
Publikováno v:
Geochemistry International. 59:448-453
A simple and reliable method for sulfate reduction using the Kiba reagent is adapted for the preparation of trace amounts of natural sulfates and sulfuric acid for isotopic (δ34S, δ33S and δ36S) sulfur analysis. It is shown that the method is succ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80982666fae5bf3e3ecb960120b5b80a
https://doi.org/10.1134/s0016702921040091
https://doi.org/10.1134/s0016702921040091
Publikováno v:
Geochemistry International. 58:1228-1238
A series of photochemical experiments with sulfur dioxide were carried out using a xenon lamp (λ > 200 nm), a low-pressure mercury lamp (λ = 184.9 and 253.7 nm), and an UP-213 laser system (λ = 213 nm) as light sources. Based on the isotope data o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e66e5ebc323872d890b476237c96927
https://doi.org/10.1134/s0016702920110105
https://doi.org/10.1134/s0016702920110105
Autor:
Alexander V. Ignatiev, Elena I. Demonterova, V. I. Levitskii, A. I. Khanchuk, I. V. Levitskii, T. A. Velivetskaya, S. V. Vysotskiy
Publikováno v:
Doklady Earth Sciences. 491:238-242
The present paper presents new U–Pb and Sm–Nd age data obtained for granulites of the Cheremshanskaya Unit enclosing metamorphosed volcano-sedimentary sulfide ores, in which sulfur isotope mass-independent fractionation (MIF–S) was established.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::779094e70600575242c93ea07b8d0e2e
https://doi.org/10.1134/s1028334x20040212
https://doi.org/10.1134/s1028334x20040212
Publikováno v:
Rapid Communications in Mass Spectrometry. 33:1722-1729
RATIONALE Measurements of the multiple sulfur isotopic composition (δ34 S, δ33 S and δ36 S values) of ancient sedimentary sulfide are useful for clarifying and reconstructing the picture of the global sulfur cycle on the early Earth. The methods u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbd63fc07d32c258e4918f61642b99b5
https://doi.org/10.1002/rcm.8528
https://doi.org/10.1002/rcm.8528
Publikováno v:
Geochemistry International. 57:751-760
–This paper presents the results of experimental studies of the behavior of mass-independent isotope effects of sulfur Δ33S and Δ36S during photochemical processes initiated by a broadband ultraviolet radiation. Experiments were performed in a fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88c8a39a78b173aff04bd9688618d5c7
https://doi.org/10.1134/s0016702919070061
https://doi.org/10.1134/s0016702919070061
Autor:
V. S. Sevastyanov, O. V. Kuznetsova, A. I. Buikin, Alexander V. Ignatiev, Tatiana A. Velivetskaya
Publikováno v:
Rapid Communications in Mass Spectrometry. 34
RATIONALE The study of multi-isotope systematics of fluid inclusions is of great importance for understanding of the sources and evolution of fluid phases in mantle rocks and ore deposits. The most appropriate technique for such investigations is a (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::350ad2d16e7f1b144dbf8b71f4db5210
https://doi.org/10.1002/rcm.8923
https://doi.org/10.1002/rcm.8923
Autor:
I. Yu. Chekryzhov, Victor P. Nechaev, Alexander V. Ignatiev, A.I. Agoshkov, T. A. Velivetskaya, Irina A. Tarasenko, S. V. Vysotskiy
Publikováno v:
Ore Geology Reviews. 103:68-77
The paper is based on stable isotopic analyses (C, O, H) first obtained for the rare earth elements + yttrium mineralization of South Primorye and Southwest Japan in addition to recent exploration data and some K-Ar and U-Pb datings. The analyzed min
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e236375fac931a93bc6df8457eeda84b
https://doi.org/10.1016/j.oregeorev.2018.01.018
https://doi.org/10.1016/j.oregeorev.2018.01.018
Autor:
S. V. Vysotskiy, Tatiana A. Velivetskaya, Sergey Y. Budnitskiy, V. V. Yakovenko, Alexander V. Ignatiev, V. I. Levitskii
Publikováno v:
Chemical Geology. 493:316-326
A new laser ablation method has been developed for measurements of multiple sulfur isotopes in sulfides using a femtosecond laser ablation system in combination with a reactor for sulfide aerosol conversion into SF6 gas, a cryogenic and chromatograph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77d45b502ed0852f5104e5d86e508c7a
https://doi.org/10.1016/j.chemgeo.2018.06.006
https://doi.org/10.1016/j.chemgeo.2018.06.006