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1.

Вид документа : Статья из журнала
Шифр издания : Г/S 98
Автор(ы) : Khonina T. G., Nikitina E. Yu., Shadrina E. V., Ganebnykh I. N., Valova M. S., Chupakhin O. N., Evstigneeva N. P., Kokhan M. M., Karabanalov M. S., Kuznetsov D. K.
Заглавие : Synthesis and antimicrobial activity of silicon-titanium-zinc- and silicon-titanium-boron-containing glycerohydrogels
Место публикации : Russian chemical bulletin. - 2021. - Vol. 70, № 5. - С. 967-974
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Novel pharmacologically active silicon—titanium—zinc- and silicon—titanium—boron-containing glycerohydrogels were synthesized by the sol—gel method using silicon, titanium, zinc, and boron glycerolates as biocompatible precursors. The compositions and structural features of the hydrogels were studied by transmission electron microscopy, scanning electron microscopy, IR spectroscopy, atomic emission spectrometry, and elemental analysis methods. The disperse phase and liquid water—glycerol medium of the hydrogels were isolated by cold exhaustive extraction with ethanol and characterized. The 3D polymeric network of the gels is formed by the products of hydrolysis and subsequent (co)condensation of silicon-/silicon—boron-containing precursors. Titanium and zinc glycerolates undergo no hydrolytic transformations under gelation conditions and exist in the cells of the 3D polymeric network in the form of amorphous nanoparticles that are not linked to the network by covalent bonds. Models of the structures were proposed. The gels are characterized by antimicrobial activity, which is more pronounced for the silicon—titanium—boron-containing gel, and they can be considered as promising drugs for topical treatment prepared by the simple, environmentally friendly, and cost-effective method.
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2.

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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3.

Вид документа : Статья из журнала
Шифр издания : 54/B 12
Автор(ы) : Egorova D. O., Gorbunova T. I., Pervova M. G., Demakov V. A.
Заглавие : Bacterial degradation of a mixture obtained through the chemical modification of polychlorinated biphenyls by polyethylene glycols [Электронный ресурс]
Место публикации : Applied Biochemistry and Microbiology. - 2014. - Vol. 50, № 7. - С. 722-729
Систем. требования: http://download-v2.springer.com/static/pdf/131/art%253A10.1134%252FS0003683814070023.pdf?token2=exp=1428652880~acl=%2Fstatic%2Fpdf%2F131%2Fart%25253A10.1134%25252FS0003683814070023.pdf*~hmac=3182eca3e5ccea6ab1f49dd6b89a557b80a88fa01d0e203f57bcd3fed34fc4d2
Примечания : Bibliogr. : p. 729 (29 ref.). - 10.04.15
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): bacterial degradation--chemical modification--polyethylene glycols
Аннотация: Polychlorinated biphenyls (PCBs), also known by the trade name Sovol, are toxic industrial wastes. They have been subjected to chemical treatment by polyethylene glycols (PEGs) and potassium hydroxide. As a result of the interaction of the Sovol with various molecular mass PEGs (MMPEG-4 ∼ 200, MMPEG-22 ∼ 1000), water-soluble mixtures M1 and M2 containing mono(polyethylene glycol)oxy-derivatives (PCB-PEG-4 and PCB-PEG-22), polychlorobiphenylols, and unreacted PCB congeners (PCB 44, PCB 47, PCB 49, PCB 52, and PCB 66) were obtained. It was shown for the first time that mixtures M1 and M2 are susceptible to bacterial degradation without their fractionation. According to the gas-liquid chromatography with flame-ionization and mass-spectrometric detection, the Rhodococcus wratislaviensis KT112-7 strain degraded all of the chemical compounds occurring in the mixtures. In a 5-day experiment, it was found that the KT112-7 strain decomposes mono(polyethylene glycol)oxy-derivatives completely (by 100%) and polychlorobiphenylols and PCB congeners by 90–95% in the M1 and M2 mixtures. The culture medium did not contain transformation products, whereas free chlorine ions were accumulated (72–94% of the maximum possible amount). Thus, the use of the chemical modification and consecutive bacterial degradation provided an effective destruction of technical PCB mixtures with a high content of highly chlorinated congeners
\\\\expert2\\nbo\\Applied Biochemistry and Microbiology\\2014, v.50, N 7, p.722-729.pdf
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4.

Вид документа : Статья из журнала
Шифр издания : 54/M 45
Автор(ы) : Khonina T. G., Safronov A. P., Shadrina E. V., Ivanenko M.V., Suvorova A. I., Chupakhin O. N.
Заглавие : Mechanism of structural networking in hydrogels based on silicon and titanium glycerolates
Место публикации : Journal of Colloid and Intrface Science. - 2012. - Vol. 365, № 1. - С. 81-89
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): hofmeister series--titanium–glycerol hydrogels --schultze–hardy rule
Аннотация: Formation of organic/inorganic hydrogels based on silicon– and titanium–glycerol precursors synthesized by transesterification of alkoxy derivatives in excess of glycerol was investigated. The precursors in excess of glycerol and obtained gels were studied by chemical and physical methods including gelation kinetics, IR spectroscopy, XRD, dynamic and electrophoretic light scattering, mechanical deformation, which disclosed the basic difference in the gelation mechanism and structure of network in the hydrogels. Due to this difference, the gelation time of silicon– and titanium–glycerol precursors depended on pH or electrolyte addition in an opposite way. In the wide pH range, silicon–glycerol hydrogel was a polymeric single-phase system formed by the polymeric network homogeneously swollen in liquid water/glycerol medium. Flory–Rehner theory applied to the elastic modulus of these gels gave 40–180 monomer base units in the subchains of the network depending on water content in the gel. The mechanism of networking was three-dimensional polycondensation promoted by the electrically charged functional groups attached to the flexible polymeric chains. Electrolyte solutions provided the gelation according to Hofmeister series. Titanium–glycerol hydrogels were heterogeneous colloid systems at pH 1.5 and single-phase polymeric gels at lower pH. Electrolyte solutions provided the gelation according to Schultze–Hardy rule
\\\\Expert2\\nbo\\Journal of Colloid and Interface Science\\2012, v.365, p.81.pdf
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5.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Pestov A. V., Slepukhin P. A., Permyakov A. E., Yatluk Yu. G.
Заглавие : Synthesis and structure of the disc-like cluster C72H 102N12Ni13O40
Место публикации : Journal of Structural Chemistry. - 2012. - Vol.53, №6. - С. 1017-1023
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): disc-like cluster ni13--synthesis--methyliminodipropionic acid
Аннотация: The disc-like cluster C72H102N12Ni 13O40 is first time synthesized based on N-(2-pyridyl)methyliminodipropionic acid. Single crystal X-ray diffraction is used to determine its atomic structure. The cluster consists of seven-nuclear core: nickel(II) hydrocomplex (Ni.Ni distance 3.012-3.032 Å) and six nickel chelates of the corresponding acid arranged around its perimeter (Ni.Ni distance 2.981-3.164 Å). In the chelate part of the complex, the ligand is pentadentate owing to the formation of a bridging bond, thus organizing a coordination geometry of the metal center as a distorted square bipyramid (4+2). Liquid chromatography-mass spectrometry is employed to study the structure of the obtained nickel(II) complexes
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6.

Вид документа : Статья из журнала
Шифр издания : 54/R 30
Автор(ы) : Verbitskiy E. V., Cheprakova E. M., Slepukhin P. A., Pervova M. G., Samorukova M. A., Zabelina O. N., Rusinov G. L., Charushin V. N.
Заглавие : Reactions of 5-(het)aryl-1-ethyl-2(1H )-pyrazinones with terminal arylacetylenes promoted by microwave radiation [Electronic resource]
Место публикации : Chemistry of Heterocyclic Compounds. - 2011. - Vol. 47, № 6. - С. 710-718
Систем. требования: http://www.springerlink.com/content/f1057834t2615065/fulltext.pdf
Примечания : Bibliogr. : p. 718 (13 ref.). - 13.01.2012
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): arylacetylenes--microwave radiation --ionic liquid
Аннотация: The reaction of 5-(het)aryl-1-ethyl-2(1H)-pyrazinones with terminal arylacetylenes, leading to a mixture of two isomeric 4-aryl- and 5-aryl-substituted 2(1H)-pyridones has been investigated. The regioselectivity of this reaction has been shown on the basis of reaction mixtures study by chromato-mass spectrometry. A crystallographic investigation of the synthesized 2(1H)-pyridones and also a forecast of their potential biological activity have been carried out
\\\\Expert2\\nbo\\Chemistry of Heterocyclic Compounds\\2011, v.47, N 6, p.710-718.pdf
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7.

Вид документа : Статья из журнала
Шифр издания : 54/P 48
Автор(ы) : Pervova M. G., Kirichenko V. E., Saloutin V. I.
Заглавие : Determination of 1,2,3-benzotriazole in aqueous solutions and air by reaction-gas-liquid chromatography [Electronic resource]
Место публикации : Journal of Analytical Chemistry. - 2010. - Vol. 65, № 3. - С. 276-279: табл., граф.
Систем. требования: http://www.springerlink.com/content/052n6875g85203j0/fulltext.pdf
Примечания : Bibliogr. : p. 279 (18 ref.). - 13.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A procedure is developed for the gas-chromatographic determination of 1,2,3-benzotriazole including preliminary derivatization with acetic anhydride in an aqueous solution followed by the extraction the derivative with toluene. The procedure is applied to the analysis of water samples, process solutions for treating metals, air of the working zone, and industrial emissions. Determination limits in water media are 0.01 mg/L and in the air of the working zone, 0.1 mg/m3.
\\\\Expert2\\nbo\\Journal of Analytical Chemistry\\2010, V. 65, N 3, p. 276-279.pdf
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8.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Zlotin S. G., Kryshtal’ G. V., Zhdankina G. M., Ignatenko A. V., Burgart Ya. V., Saloutin V. I., Chupakhin O. N.
Заглавие : Synthesis of 2,6-bis(fluoroalkyl)-2,6-dihydroxytetrahydro-2H-pyran-3,5-dicarboxylates from aldehydes and fluorinated beta-oxo esters in the presence of ionic liquid-K2CO3 as catalytic system [Electronic resource]
Место публикации : Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2010. - Vol. 46, № 4. - С. 468-473: рис., табл.
Систем. требования: http://www.springerlink.com/content/hl6758qk37554530/fulltext.pdf
Примечания : Bibliogr. : p. 472-473 (35 ref.). - 1.11.2011 г.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: An efficient procedure has been developed for the synthesis of 4-substituted 2,6-bis(fluoroalkyl)-2,6-dihydroxytetrahydro-2H-pyran-3,5-dicarboxylates by reactions of aldehydes with fluorine-containing ?-oxo esters in heterogeneous catalytic system 1-butyl-3-methylimidazolium tetrafluoroborate [bmim][BF4]-K2CO3 activated by ultrasound. The system retains its catalytic activity for three reaction cycles.
\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2010, 46 (4), 468-473.pdf
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9.

Вид документа : Статья из журнала
Шифр издания : 54/A 90
Автор(ы) : Belykh D.V., Buravlev E. V., Slepukhin P. A., Kuchin A. V.
Заглавие : Atropoisomerism of 13-N,N-dimethylamide-15,17-dimethyl ester of chlorin e6 from the data of X-ray, 1H NMR, and HPLC [Electronic resource]
Место публикации : Russian Journal of General Chemistry. - 2010. - Vol. 80, № 11. - С. 2382-2386
Систем. требования: http://www.springerlink.com/content/95g3637738830314/fulltext.pdf
Примечания : Bibliogr. : p. 2386 (9 ref.). - 17.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Atropoisomerism of tertiary 13-amides of chlorin e 6 was studied by the methods of X-ray analysis, 1H NMR spectroscopy, and high performance liquid chromatography on the example of 13-N,N-dimethylamide-15,17-dimethyl ester of chlorin e 6. The spatial structure of the major and minor atropoisomers was established. The possibility of reversible interconversion of the atropoisomers of the studied compound in solution was shown
\\\\Expert2\\nbo\\Russian Journal of General Chemistry\\2010, V. 80, N 11, p.2382-2386.pdf
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10.

Вид документа : Статья из журнала
Шифр издания : 54/D 55
Автор(ы) : Kataev V. E., Militsina O. I., Strobykina I. Yu., Gubaidullin A. T., Zverev V. V., Kataeva O. N., Fedorova O. V., Valova M. S., Rusinov G. L.
Заглавие : Diesters on the basis of 16-hydroxyisosteviol and dicarboxylic acids as carriers of Fe(III) picrates
Место публикации : Journal of Inclusion Phenomena and Macrocyclic Chemistry. - 2008. - Vol. 60, № 1-2. - С. 51-58
Примечания : Библиогр. : с. 58 (32 назв.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Diesters on the basis of 16-hydroxyisosteviol and dicarboxylic acids, exhibiting anti-tubercular activity, transport Fe(III) through liquid chloroform membrane which models a cell membrane. It is revealed that fluxes and anti-tubercular activity increase, as the length of the chain (spacer) between two ent-beyran skeletons of diesters increases. Computations on the level DFT/PBE explain the dependence of complexes stability on a structure of diterpenoid ligands. The structures of three diesters were established by single crystal X-ray analysis. ??
\\\\Expert2\\nbo\\Journal of Inclusion Phenomena and Macrocyclic Chemistry\\2008, V.60, N1-2, 51.pdf
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