Zobrazeno 1 - 10
of 298
pro vyhledávání: '"A. S. Levchenko"'
Autor:
A. V. Lobanova, K. S. Levchenko, G. E. Adamov, P. S. Smelin, E. P. Grebennikov, А. D. Kirilin
Publikováno v:
Тонкие химические технологии, Vol 19, Iss 1, Pp 52-60 (2024)
Objectives. To create new polymer materials based on organosilicon derivatives of benzocyclobutene and to study the possibility of their use as insulating dielectric layers in micro- and microwave electronics devices.Methods. The synthesis of the dib
Externí odkaz:
https://doaj.org/article/460631da5d7c4af6939133adb5046232
Publikováno v:
RUDN Journal of Informatization in Education, Vol 17, Iss 1, Pp 36-48 (2020)
Problem and goal. The article describes how to organize electronic training materials for post-training support. The relevance of the article is determined, on the one hand, by the external needs to expand the sphere of education, the tasks of furthe
Externí odkaz:
https://doaj.org/article/0fbbc5d29939488b9afe96477c2fb1f4
Autor:
Konstantin S. Levchenko, Gregory E. Adamov, Dmitri Yu. Demin, Polina A. Chicheva, Konstantin A. Chudov, Pavel S. Shmelin, Evgeny P. Grebennikov
Publikováno v:
Molbank, Vol 2020, Iss 4, p M1160 (2020)
Di(bicyclo[4.2.0]octa-1(6),2,4-trien-3-yl)dimethylsilane (DiBCB-DMS) was synthesized as a promising monomer for polymer coating production with good dielectric properties for electronics. DiBCB-DMS was characterized by 1H, 13C NMR, IR, UV/VIS, and HR
Externí odkaz:
https://doaj.org/article/21e1bc0bee024e2b89742eed9dab2985
Publikováno v:
Molbank, Vol 2020, Iss 1, p M1116 (2020)
4-(2-Bromovinyl)benzocyclobutene was prepared via a five stage synthesis starting from benzocyclobutene in an overall 30% yield. 4-(2-Bromovinyl)benzocyclobutene has a potential applications in synthesis of monomers for dielectric materials.
Externí odkaz:
https://doaj.org/article/b11f3af19f454c2db655011103783633
Autor:
Konstantin S. Levchenko, Konstantin A. Chudov, Dmitri Yu. Demin, Konstantin A. Lyssenko, Pavel S. Shmelin
Publikováno v:
Molbank, Vol 2020, Iss 1, p M1106 (2020)
A new adamantan-2-ol with a 2-bicyclo[4.2.0]octa-1,3,5-trien-3-yl substituent in the position 2 was synthesized via two stage synthesis starting from benzocyclobutene and adamatan-2-one. The structure of the title compound was determined using 1H-and
Externí odkaz:
https://doaj.org/article/333a8d15e8c045ceabfa58803ae1f8a0
Autor:
L. S. Levchenko, M. V. Olonova
Publikováno v:
Проблемы ботаники Южной Сибири и Монголии. 21:101-104
The Siberian kandyk (Erythronium sibiricum (Fisch. et Mey.) Kryl.) is listed in the Red Books of the Russian Federation and in the regions where it grows. The Siberian kandyk is widespread in Southern Siberia and Mongolia. This species has many usefu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1855e29bc95574d213a6e3b15903c5a5
https://doi.org/10.14258/pbssm.2022062
https://doi.org/10.14258/pbssm.2022062
Autor:
Konstantin S. Levchenko, Konstantin A. Chudov, Dmitri Yu. Demin, Pavel S. Shmelin, Evgeny P. Grebennikov
Publikováno v:
Molbank, Vol 2020, Iss 1, p M1102 (2019)
Bicyclo[4.2.0]octa-1,3,5-trien-3-yl-dimethyl-((E)-styryl)-silane was synthesized via three stage synthesis starting from benzocyclobutene and (2-bromo-vinyl)-benzene. The structure of the product was determined using 1H- and 13C-NMR and HRMS.
Externí odkaz:
https://doaj.org/article/d912bcce0d94450db0f85021cdccb308
Publikováno v:
Laser Medicine. 25:51-59
The authors discuss perspectives for applying photodynamic therapy (PDT) in patients with vulvar intraepithelial neoplasia (VIN); they also analyze domestic and foreign literature sources. Up to now, some experience on the treatment of background, pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2aca1f8b6f4ec6ec3833acb72a6480c
https://doi.org/10.37895/2071-8004-2021-25-4-51-59
https://doi.org/10.37895/2071-8004-2021-25-4-51-59
Autor:
S. Levchenko
Publikováno v:
Zhytomyr Ivan Franko state university journal. Рedagogical sciences. :41-50
The article, based on the analysis of scientific sources and own research, considers the problem of formation of innovative competence of future social workers through interactive teaching methods. The results of the study of the solution of this pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b74a9d7b9a3bfb48d8d56b5a34a458c5
https://doi.org/10.35433/pedagogy.4(107).2021.41-50
https://doi.org/10.35433/pedagogy.4(107).2021.41-50
Autor:
Yu. S. Levchenko, L. V. Stepanova
Publikováno v:
The EYE GLAZ. 23:37-42
Purpose. To study the possibility of using bioluminescence biotesting to evaluate the toxicity of contact lens care solutions.Methods. The examined solutions were tested both immediately upon unpacking (i.e. sterile) and after rinsing “Pure Vision
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24ad0c7af60a220a5ef330cc2bd6bc24
https://doi.org/10.33791/2222-4408-2021-4-37-42
https://doi.org/10.33791/2222-4408-2021-4-37-42