Výsledky vyhledávání - "K. A. Dychko"

Degradation of Diclofenac in Aqueous Solutions under Conditions of Combined Homogeneous and Heterogeneous Photocatalysis

Autor: Maria V. Sherstoboeva, K. A. Dychko, L. N. Skvortsova, K. A. Bolgaru

Publikováno v: Russian Journal of Physical Chemistry A. 94:1248-1253

The sorption and photocatalytic activities of metal–ceramic composites synthesized via self-propagating high-temperature synthesis (SHS) in the degradation of diclofenac (DCF) is studied. The phase composition and optical properties of the composit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bff7737a5b5d1bffb22a6bebf1c7c4f3
https://doi.org/10.1134/s0036024420060242

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Use of solid phase extraction for the determination of additives in automotive oils using the GC / MS

Autor: R. L. Akhmedov, K. A. Dychko, I. V. Ramus, S. S. Kravtsova

Publikováno v: Аналитика и контроль. 23:532-538

Currently, the determination of additives in lubricating oils is carried out using such analysis methods as IR spectroscopy, TLC, HPLC-UV, GC, GC-MS. To eliminate the interfering influence of the base oil components, various sample preparation method

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::82972a9b100ea30759978d87e5c028c6
https://doi.org/10.15826/analitika.2019.23.4.001

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Products of the Intermediate Oxidation of Flavonoids in Aqueous Solutions and the Determination of Their Composition by High-Performance Liquid Chromatography–Mass Spectrometry

Autor: K. A. Dychko, V. V. Khasanov, S. S. Kravtsova, T. T. Kuryaeva, A. V. Labutin

Publikováno v: Journal of Analytical Chemistry. 73:1248-1252

Using high-performance liquid chromatography in combination with electrospray ionization mass spectrometry [HPLC–MS-ESI(NEG)], quercetin [Q] and luteolin [L] intermediate oxidation products were investigated. It was found that, in aqueous solutions

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f302ef792907e767741dbe4efd586bcf
https://doi.org/10.1134/s1061934818130051

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Artemisinin content in Artemisia annua L. extracts obtained by different methods

Autor: V. V. Khasanov, T. E. Soktoeva, G. L. Ryzhova, S. V. Zhigzhitzhapova, L. D. Radnaeva, K. A. Dychko

Publikováno v: Russian Journal of Bioorganic Chemistry. 39:761-764

Isolation of artemisinin from Artemisia annua L. and its quantification by the HPLC-MS method are considered. Different extraction methods were used for the isolation of artemisinin: maceration, ultrasonic and subcritical CO2-extraction. The componen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b6c7998560dd17462fdbd812d8a403d
https://doi.org/10.1134/s1068162012070199

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Determination of fatty acids in products of the vibromagnetic treatment of sapropel by chromatography-mass spectrometry

Autor: K. A. Dychko, M. Tyunina, G. L. Ryzhova

Publikováno v: Journal of Analytical Chemistry. 68:736-742

Lipids in the colloidal (micellar) form were isolated from sapropel of a lake of Karasevoe (Tomsk region) using the method of aqueous vibromagnetic extraction. It has been demonstrated that the yield of lipids in the vibromagnetic treatment of saprop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f007db095662caf946de8a7e4ac5bc88
https://doi.org/10.1134/s1061934813080108

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HPLC determination of ascorbic acid in blood

Autor: T. T. Kuriaeva, E. V. Nesterova, K. A. Dychko, V. V. Khasanov

Publikováno v: Аналитика и контроль. 17:322-325

Sample preparation and HPLC conditions for the quantitative determination of ascorbic acid in objects with a complex matrix (blood) were studied. Influences of ascorbic acid degradation in the presence of different stabilizers and a sample matrix on

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a0f28d6d995696198e0509711fa4374
https://doi.org/10.15826/analitika.2013.17.3.008

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Aqueous vibromagnetic extraction of hydrophilic and hydrophobic biologically active substances from peloids of varied genesis

Autor: K. A. Dychko, G. L. Ryzhova, M. Tyunina, V. A. Daneker, V. V. Khasanov

Publikováno v: Russian Journal of Applied Chemistry. 85:1327-1334

Aqueous vibromagnetic extraction of hydrophobic and hydrophilic biologically active substances from peloids of varied origin (sapropels, and sulfide-slime mud) was developed. Instrumental analytical techniques (GC/MS, TLS, IR spectroscopy), gravimetr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5905e49aaf61621b7e42b00e53f9148d
https://doi.org/10.1134/s1070427212090054

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Investigation of intermediate oxidation products of Genistein and Luteolin generated in aerobic conditions

Autor: Vyacheslav Khasanov, S. S. Kravtsova, K. A. Dychko, V. V. Khasanov

Publikováno v: Key engineering materials. 2015. Vol. 670. P. 171-176

Unstable intermediate oxidation products in the solution of Luteolin [L] and Genistein [G] were discovered by HPLC-MS-ESI(-) in aerobic conditions at pH=8. These covalently bonded compounds of [2L-H2] and [L+G-H2] compositions, as well as trimeric [L

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d2f83ff2112a4a50ba78c3b4b8f06e9
https://openrepository.ru/article?id=823797

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