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Общее количество найденных документов : 27
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 1-10    11-20   21-27 
1.
Инвентарный номер: нет.
   
   T 44


   
    Thermal-decomposition of peroxide derivatives of polyfluorinated beta-ketoesters [Electronic resource] / A. I. Rakhimov, V. V. Chapurkin, A. I. Valdman, D. I. Valdman, V. I. Saloutin, K. I. Pashkevich, S. L. Kokorin, Z. E. Skryabina, // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1990. - Vol. 39, N 7. - P1496-1499
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The thermal flow microcalorimetric method was used to determine the kinetic parameters for the thermal decomposition of peroxide derivatives of polyfluorinated beta-ketoesters and the decomposition products were established

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1990, 39 (7), 1496.pdf
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2.
Инвентарный номер: нет.
   
   T 44


    Rusinov, V. L.
    The scintillator tile hadronic calorimeter prototype [Text] / V. L. Rusinov // Nuclear Physics B, Proceedings Supplements. - 2006. - Vol. 150: Innovative Particle and Radiation Detectors. - P253-256
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A high granularity scintillator hadronic calorimeter prototype is described. The calorimeter is based on a novel photodetector - Silicon Photo-Multiplier (SiPM). The main parameters of SiPM are discussed as well as readout cell construction and optimization. The experience with a small prototype production and testing is described. A new 8 k channel prototype is being manufactured now.

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3.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis and GC-MS study of fluorinated esters derived from thrimethylolpropane [Electronic resource] / M. G. Pervova, V. E. Kirichenko, T. I. Gorbunova, A. Ya. Zapevalov, V. I. Saloutin // Russian Journal of General Chemistry. - 2008. - Vol. 78, № 9. - P1701-1706
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Zol-gel process was used to synthesize equilibrium mixtures of mono-, di-, and trimester derived from trimethylolpropane and perfluorocarboxylic acids. The elution order of the components of the mixtures from a weakly polar HP-5 column was established. The mass spectra of the synthesized compounds were studied. The GC-MS parameters of the products were compared with the respective parameters of their nonfluorinated analogs. The characteristics of the fluorinated esters have features determined by the esterification degree and the nature of the perfluoroalkyl groups, due to which these compounds can be identified in mixtures

\\\\Expert2\\nbo\\Russian Journal of General Chemistry\\2008, V. 78, N 9, p.1701.pdf
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4.
Инвентарный номер: нет.
   
   K 81


    Krasnov, V. P.
    Nucleophilic substitution of halogen in 4-halo derivatives of glutamic acid 3. High pressure effect on the stereochemical result of the reaction [Electronic resource] / V. P. Krasnov, M. A. Koroleva, G. L. Rusinov // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1996. - Vol. 45, № 3. - P543-544
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of diastereomeric dialkyl N-phthaloyl-4-haloglutamates withpara-anisidine were studied at high pressure, and an additional confirmation of the exactS N2 mechanism of the reactions was obtained. Quantitative parameters of the relative reactivity of the diastereomers were found in various solvents, which made it possible to perform the desired synthesis of products of diastereomeric substitution. kg]Key words kw]glutamic acid kw]diastereoselectivity kw]nucleophilic substitution kw]reaction rate constant kw]high pressure.

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1996, 45 (3), 543.pdf
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5.
Инвентарный номер: нет.
   
   K 66


    Kodess, M. I.
    A 19f decoupler for the tesla bs 587a nmr spectrometer [Text] / M. I. Kodess, V. S. Shaburov, S. N. Frolov // Instruments and Experimental Tehniques. - 1999. - Vol. 42, № 3. - P379-380
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A decoupling unit (decoupler) operating at a resonance frequency of 19F nuclei (75.26 MHz) is developed. The unit is a plug-in block intended for the Tesla BS 587A NMR spectrometer. It allows one to perform double resonance experiments involving 19F nuclei. Decoupler parameters are determined in the continuous wave and pulsed operation modes

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6.
Инвентарный номер: нет.
   
   C 74


   
    Complexes of crown ethers with perfluorocarboxylic acids and their thermal decarboxylation [Electronic resource] / A. V. Podol'skii, T. G. Khonina, O. V. Koryakova, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1993. - Vol. 42, № 6. - P1052-1055
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Crown ethers form strong proton-acceptor complexes with CF3COOH or C4F9COOH that undergo thermal decarboxylation at 200–260 °C which results in 60–80% of CF3H or C4F9H (including up to 20 % of a mixture of C4F8). Critical parameters of the process were determined in relation to the temperature and amount of crown ether. The relative activities of different crown ethers in decarboxylation were also established. A scheme is proposed that explains the effect of the structure of crown ethers on this reaction. The data obtained substantiate the view that the topological correspondence concept is insufficient to explain the ability of crown ethers to form complexes with cat

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1993, 42 (6), 1052.pdf
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7.
Инвентарный номер: нет.
   
   M 38


   
    Mass transfer with chemical reaction in conditions of spontaneous interfacial convection in processes of liquid extraction [Text] / S. A. Ermakov, A. A. Ermakov, O. N. Chupakhin, D. V. Vaissov // Chemical Engineering Journal. - 2001. - Vol. 84, № 3. - P321-324
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The paper investigates mass transfer with a chemical reaction in conditions of spontaneous interfacial convection (Marangoni effect). It is shown that a chemical reaction changes the ratio of phase resistance, with the result that the balance of forces at the surface is disturbed and interfacial instability is initiated. The effect of the concentration and the surface activity of a transferred reagent on the conditions of initiation of interfacial instability and the intensity of interfacial convection has been investigated. The determining parameters are the ratio of phase resistances, the surface activity and the concentration of a transferred reagent

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8.
Инвентарный номер: нет.
   
   C 65


   
    Cobalt-containing catalytic systems alloyed with rare and rare-earth metals as catalysts for synthesis of hydrocarbons from CO and H2 [Electronic resource] / A. S. Seleznev, L. A. Petrov, O. N. Chupakhin, V. I. Kononenko, I. A. Chupova, A. V. Ryabina // Russian Journal of Applied Chemistry. - 2009. - Vol. 82, № 5. - P820-825
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: To improve cobalt-containing catalytic systems for synthesis of hydrocarbons from carbon monoxide and hydrogen (Fischer-Tropsch synthesis), supports based on ultradispersed alloys of aluminum with rare and rare-earth metals (G, Ce, Sm) were obtained and studied. The catalytic activity parameters of the new catalysts were determined

\\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2009, v. 82, N 5, p.820.pdf
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9.
Инвентарный номер: нет.
   


   
    1,2,4-Triazine method of bipyridine ligand synthesis for the preparation of new luminescent Eu(III) complexes [Text] / A. M. Prokhorov, V. N. Kozhevnikov, D. S. Kopchuk, D. N. Kozhevnikov // Tetrahedron. - 2011. - Vol. 67, № 3. - P597-607
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The ‘triazine’ methodology for the synthesis of functionalised bipyridine ligands proved to be a convenient method for the preparation of luminescent Eu(III) complexes. The approach allows flexible construction of chromophore and coordination sphere with control of photophysical properties. Europium (III) complexes [Eu1]-[Eu5] prepared in this way exhibit intense long-life metal-centered luminescence in aqueous media. The aromatic substituent in the position 5 of bipyridine has a significant influence on luminescence parameters and is used to introduce functionality for bioconjugation. The complexes [Eu4] and [Eu5] bearing primary amine groups are ready-to-go luminescent ‘tags’ for peptide labeling

\\\\Expert2\\nbo\\Tetrahedron\\2011, v. 67, p. 597.pdf
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10.
Инвентарный номер: нет.
   
   C 45


   
    Changes in the vibrational characteristics of substituted 1,2,4,5-tetrazines after complexation with 1,2,3-benzotriazole: A theoretical study [Electronic resource] / N. N. Ivshina, E. V. Bartashevich, V. A. Potemkin, M. A. Grishina, R. I. Ishmetova, G. L. Rusinov, N. I. Latosh, P. A. Slepukhin, V. N. Charushin // Journal of Structural Chemistry. - 2009. - Vol. 50, № 6. - P1053-1058
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The complexation of 3,6-substituted 1,2,4,5-tetrazines with benzotriazole was studied theoretically based on the vibrational spectra. For model complexes, the energy was minimized by the geometrical parameters, and the spectral characteristics were calculated by the PM3 method. The shift of the bond vibration frequencies of the atoms involved in complexation after the formation of different various intermolecular contacts was determined. This made it possible to determine the type of intermolecular interaction and suggest the structures of the complexes

\\\\Expert2\\nbo\\Journal of Structural Chemistry\\2009, V. 50, N 6, p.1053.pdf
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