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Общее количество найденных документов : 33
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1.

Вид документа : Статья из журнала
Шифр издания : 54/A 67
Автор(ы) : Azarova Yu. A., Pestov A. V., Ustinov A. Yu., Bratskaya S.YU.
Заглавие : Application of chitosan and its N-heterocyclic derivatives forpreconcentration of noble metal ions and their determination usingatomic absorption spectrometry
Место публикации : Carbohydrate Polymers. - 2015. - Vol. 134. - С. 680-686
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chitosan--n-heterocyclic derivatives--spectrometry
\\\\expert2\\NBO\\Carbohydrate Polymers\\2015, v. 134, p. 680.pdf
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2.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kir'yanova T. D., Egorova D. O., Gorbunova T. I., Pervova M. G.
Заглавие : Bacterial degradation of PCB 70 and its hydroxy derivatives is an environmentally friendly way to destroy pops
Место публикации : Bio Web of Conferences : International Scientific and Practical Conference “Innovations, Technological Solutions and Management in Modern Biotechnology and Biomedicine” (ITSM-2022). - Pushchino, 2023. - С. 09002
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: One of the problems of our time is the environmentally safe destruction of polychlorinated biphenyls (PCBs) and their hydroxylated derivatives. The aim of the study was to investigate the features and prospects of the decomposition of PCB 70 (2,5,3',4'-tetrachlorobiphenyl) and hydroxylated chlorobiphenyls derived from it by Rhodococcus wratislaviensis strain CH628. As a result of the application of methods of periodic cultivation, gas chromatography and light spectrometry, it was found that the efficiency of destruction of PCB 70 1 g of cells of strain CH628 was 90 mg PCB/day, and the same indicator for a mixture consisting of hydroxy derivatives obtained from PCB 70 was 56 mg PCB/day. It was shown that the strain uses all components of the mixture of hydroxy-PCB 70 as a growth substrate, but with different degradation rates. When cultivated in a mineral medium with PCB 70 or a mixture of hydroxy-PCB 70, strain CH628 forms biofilms. The analysis of the obtained results shows that the use of the Rhodococcus wratislaviensis CH628 strain will make it possible to develop a technology for the environmentally safe destruction of PCB 70 and hydroxy-PCBs derived from it.
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3.

Вид документа : Статья из сборника (однотомник)
Шифр издания : 54/C 47
Автор(ы) : Charushin V. N., Nosova E. V., Lipunova G. N.
Заглавие : Fluorinated derivatives of condensed heterocycles on the basis of (polyfluorobenzoyl)chlorides : доклад, тезисы доклада
Место публикации : XXth European Colloquium on Heterocyclic Chemistry, Stockholm,Sweden, 18-21 Aug. 2002 г. - Stockholm, 2002. - С. B:4
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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4.

Вид документа :
Шифр издания : 54/C 73
Автор(ы) : Verbitskiy E. V., Cherprakova E. M., Slepukhin P. A., Kodess M. I., Ezhikova M. A., Pervova M. G., Rusinov G. L., Chupakhin O. N., Charushin V. N.
Заглавие : Combination of the Suzuki–Miyaura cross-coupling and nucleophilic aromatic substitution of hydrogen (HSN) reactions as a versatile route to pyrimidines bearing thiophene fragments
Место публикации : Tetrahedron. - 2012. - Vol.68, №27-28. - С. 5445-5452
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): suzuki–miyaura --cross-coupling --pyrimidines
Аннотация: It has been shown that combination of the Suzuki–Miyaura cross-coupling and nucleophilic aromatic substitution of hydrogen is a versatile method for the synthesis of 4-(thiophen-2-yl)-, 5-(thiophen-2-yl)-, and 4,5-di(thiophen-2-yl) substituted pyrimidines from the commercially available 5-bromopyrimidine. The HSN (AE)- and HSN (AO)-reactions of 5-bromopyrimidine with thiophene and 2-bromothiophene have been studied by gas–liquid chromatography/mass-spectrometry. The structures of intermediate σH-adducts, as well as thiophene-(thiophenyl)pyrimidine and bithiophene-(thiophenyl)pyrimidine dyads have first been established by X-ray crystallography analysis
\\\\Expert2\\nbo\\Tetrahedron\\2012, v. 68, p. 5445.pdf
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5.

Вид документа :
Шифр издания : 54/C 75
Автор(ы) : Verbitskiy E. V., Rusinov G. L., Charushin V. N., Chupakhin O. N., Cheprakova E. M., Slepukhin P. A., Pervova M. G., Kodess M. I.
Заглавие : Consecutive S-N(H) and Suzuki–Miyaura Cross-Coupling Reactions – an Efficient Synthetic Strategy to Pyrimidines Bearing Pyrrole and Indole Fragments
Место публикации : European Journal of Organic Chemistry. - 2012. - Vol. 2012, №33. - С. 6612-6621
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): synthetic methods--cross-cou­pling--nitrogen heterocycles
Аннотация: The combination of the Suzuki–Miyaura cross-coupling and nucleophilic aromatic substitution of hydrogen reactions is a versatile tool for the syntheses of 4-(1R-pyrrol-2-yl)- and 4-(1R-indol-3-yl)-5-(hetero)aryl-substituted pyrimidines from commercially available 5-bromopyrimidine. The SNH [AE, (addition–elimination)] and SNH [AO, (addition–oxidation)] reactions of 5-bromopyrimidine with pyrroles and indoles were studied by gas chromatography–mass spectrometry. The structures of the intermediate σH adducts as well as the pyrrole-(hetero)arylpyrimidine and indole-(hetero)arylpyrimidine dyads were established for the first time by X-ray crystal structure analysis
\\\\Expert2\\nbo\\European Journal of Organic Chemistry\\2012, p.6612.pdf
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6.

Вид документа : Статья из журнала
Шифр издания : 54/C 78
Автор(ы) : Kuznetsova O. A., Khmara E. F., Filyakova V. I., Uimin M. A., Ermakov A. E., Rhee C. K., Charushin V. N.
Заглавие : Copper and Copper Oxides Nanopowders in the Oxidative Condensations of Phenylacetylene and Tert-Butylacetylene [Electronic resource]
Место публикации : Russian Journal of General Chemistry. - 2007. - Vol. 77, № 3. - С. 404-408
Систем. требования: http://www.springerlink.com/content/q63v45313150n82x/fulltext.pdf
Примечания : Библиогр. : с. 408 (12 назв.). - 17.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Transformations of phenylacetylene and tert-butylacetylene in the presence of copper and copper oxide (Cusub2/subO, CuO) nanopowders prepared by gas-phase condensation of copper in argon were studied. The reaction of phenylacetylene with copper oxide nanopowders having different phase compositions in the absence of a solvent at room temperature resulted in oxidative condensation of phenylacetylene and complex formation of the condensation product. The complex undergoes decomposition by the action of acids, bases, and compounds capable of forming complexes. According to the X-ray diffraction data, one of the products is a new “parquet” modification of diphenyldiacetylene. Under analogous conditions, tert-butylacetylene gave rise to a complex mixture of products among which di- tert-butyldiacetylene was identified by gas chromatography-mass spectrometry. No copper complexes with the tert-butylacetylene condensation products were detected.
\\\\expert2\\nbo\\Russian Journal of General Chemistry\\2007, V. 77, N 3, p.404.pdf
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7.

Вид документа : Статья из сборника (однотомник)
Шифр издания : 54/D 45
Автор(ы) : Deryabina T. G., Utepova I. A., Chupakhin O. N.
Заглавие : Interaction 3-(2-hydroxy-2-aryl/hetaryl-vinil)-1H-quinoxalin-2-ones with hydrazine hydrate : доклад, тезисы доклада
Место публикации : Fifth International Conference on Organic Chemistry for young Scientists (InterYCOS-2009) "Universities Contribution in the Organic Chemistry Progress", devoted to the 175 th anniversary of D.I.Mendeleevs birthday and 80th anniversary of the Chemistry department of St. Petersburg State University foundation, Saint-Petersburg, 22-25 june 2009 : abstr. - СПб., 2009. - С. 117 (P-1-19)
Примечания : Bibliogr. : p. 117 (1 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
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8.

Вид документа : Статья из журнала
Шифр издания : 54/F 33
Автор(ы) : Khonina T. G., Safronov A. P., Ivanenko M.V., Shadrina E. V., Chupakhin O. N.
Заглавие : Features of silicon- and titanium-polyethylene glycol precursors in sol-gel synthesis of new hydrogels [Электронный ресурс]
Место публикации : Journal of Materials Chemistry B. - 2015. - Vol. 3, № 27. - С. 5490-5500
Систем. требования: http://apps.webofknowledge.com/
Примечания : Bibliogr. : p. 5499-5500 (38 ref.). - 20.01.2016
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): modified silanes --mineralization--monoliths
Аннотация: The formation of organic/inorganic hydrogels based on silicon and titanium polyethylene glycolates, new biocompatible water-soluble precursors in sol-gel processing, was investigated. The influence of different factors on the gelation process, such as excess of PEG, water molar content, pH of medium, electrolyte additives, was investigated in comparison with silicon-and titanium-glycerol precursors. The specific features of gelation for each type of precursor were revealed. It has been determined that titanium polyethylene glycolates synthesized and used in the excess of PEG formed transparent polymeric hydrogels resistant to syneresis under certain conditions. The titanium polyethylene glycolates synthesized without excess of PEG formed turbid heterogeneous colloidal gels. In the case of silicon polyethylene glycolates the hydrogels obtained were polymeric. Dynamic light scattering was used to confirm the polymeric or colloidal type of gelation. The solid and liquid phases of polymeric silicon- and titanium-polyethylene glycol hydrogels were separated by exhaustive extraction. The solid phase was characterized by combined thermal analysis with simultaneous quadruple mass spectrometry, XRD, IR spectroscopy, and liquid phase-atomic emission spectroscopy. The structural features of polymeric gels were investigated by SEM and TEM methods. The cross-linking density of polymeric hydrogels was evaluated using Flory-Rehner theory based on the mechanical properties of swollen networks of flexible polymeric chains
\\\\expert2\\nbo\\Journal of Materials Chemistry B\\2015. V. 3, N 27. P. 5490-5500.pdf
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kudyakova Yu.S., Slepukhin P. A., Ganebnykh I. N., Burgart Ya. V., Saloutin V. I., Bazhin D. N.
Заглавие : Functionalized trifluoromethyl-containing lithium β-diketonate in the synthesis of homo- and heteronuclear complexes of rare-earth metals
Место публикации : Russian Journal of Coordination Chemistry. - 2021. - Vol. 47, № 4. - С. 280-295
Ключевые слова (''Своб.индексиров.''): β-diketonates--lanthanides--19f nmr spectroscopy--mass spectrometry
Аннотация: The reactions of functionalized lithium CF3-β-diketonate (LiL) with trivalent rare-earth metal salts in methanol afford homobinuclear and heterobi(tri)nuclear complexes depending on the nature of the transition metal and anion (chlorides, nitrates, and acetates). In the cases of lanthanum(III) and cerium(III), homoleptic complexes [(LnL3)2] are isolated (CIF files CCDC nos. 2031097 (Ia) and 2031102 (Ib)). The reaction of LiL with praseodymium(III) nitrate gives the new trimetallic structure [(LiPrL3)(LiL)(NO3)(H2O)2] (CIF file CCDC no. 2031103 (II)), and the replacement of nitrate by chloride gives [(PrL3)(LiL)(H2O)] (CIF file CCDC no. 2031104 (IIIa)). Regardless of the nature of the anion of the salt in the series from neodymium(III) to ytterbium(III) and yttrium(III), Ln–Li β-diketonates [(LnL3)(LiL)(solv)] (solv is H2O and MeOH) are formed, and their structures are characterized by X-ray structure analysis (CIF files CCDC nos. 2031099 (IIIb), 2031100 (IIIc), 2031098 (IVa), 2031096 (IVc), 2031094 (IVf), 2031101 (IVg), and 2031095 (IVh)). The equilibrium of the diketonate isomeric forms in a solution of deuterated dimethyl sulfoxide is studied by 19F NMR spectroscopy, and the qualitative composition of the polynuclear complexes is determined by mass spectrometry.
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10.

Вид документа : Статья из журнала
Шифр издания : 54/K 48
Автор(ы) : Kirichenko V. E., Osipova O. A.
Заглавие : Gas chromatography mass spectrometry of perfluoroacyl derivatives of alkane thiols
Место публикации : Journal of Analytical Chemistry. - 1996. - Vol. 51, N 11. - С. 1061-1063
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The electron-impact mass spectra of trifluoroacetyl, pentafluoropropionyl, heptafluorobutyryl, and perfluoropentanoyl derivatives of lower C-1-C-6 alkane thiols are studied for the first time, and fragmentation patterns are determined
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