共查询到20条相似文献,搜索用时 33 毫秒
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The photooxidation of chloral was studied by infrared spectroscopy under steady-state conditions with irradiation of a blackblue fluorescent lamp (300 nm < λ < 400 nm, λmax = 360 nm) at 296 ± 2 K. The products were hydrogen chloride, carbon monoxide, carbon dioxide, and phosgen. The kinetic results reveal that the reaction proceeds via chain reaction of the Cl atom: The results lead to the conclusion that mechanism (B) is confirmed to be more likely than mechanism (A), which was favored at one time by Heicklen for the mechanism of the oxidation of trichloromethyl radicals by oxygen molecules: The ratio of the initial rates of CO and CO2 formation gave k7/k6 = 4.23M?1, and the lower limit of reaction (5) was found to be 3.7 × 108M?1 sec?1. 相似文献
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Nasriddinov Sh. A. Minkovskii E. B. Zenkevich G. A. Ryshka F. Yu. 《Chemistry of Natural Compounds》1970,6(5):669-669
Chemistry of Natural Compounds - 相似文献
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The chemical compositions of the initial bark of the Siberian firAbies sibirica and of the solid residues after extraction with carbon dioxide, water, and alcohol have been studied. On successive extraction, the yield of extractive substances amounted to 25.05% of the absolutely dry bark. The carbon dioxide, aqueous, and alcoholic extracts obtained have been investigated. The carbon dioxide extract was found to contain 34.97% of essential oil, while only traces of it were detected in the aqueous and alcoholic extracts.Krasnoyarsk State Technological Academy. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 42–45, January–February, 1996. Original article submitted August 14, 1995. 相似文献
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Efimova I. V. Smirnova O. V. Opeida I. A. 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2019,93(4):661-664
Russian Journal of Physical Chemistry A - The inhibition of the initiated oxidation of cumene by oxygen under homophase conditions, where acetonitrile or dimethylsulfoxide are used as the solvent,... 相似文献
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T. V. Khomova S. D. Gusakova Yu. M. Murdakhaev A. U. Umarov 《Chemistry of Natural Compounds》1984,20(1):27-32
A change in the geographical growth zone and in the density of the soil has a substantial influence on the amount of lipids in the seeds ofPlectranthus glaucocalyx Maxim. and their degree of unsaturation, and also on the structure of the triacylglycerols.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 30–35, January–February, 1984. 相似文献
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Yu. G. Gol'tsov Z. V. Smelaya L. A. Matkovskaya V. V. Tsyrina V. G. Il'in 《Theoretical and Experimental Chemistry》1999,35(2):109-113
It has been established that supramolecular structures of lecithin can act as templates in the synthesis of mesoporous aluminosilicates. Mesoporous substances, with pore dimensions up to 100 Å and biporous materials can be obtained when various combinations of lecithin with cetyltrimethylammonium bromide or octadecylamine are used as template agents in the aluminosilicate system. 相似文献
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M. P. Anisimov E. G. Fominykh S. V. Akimov A. V. Trilis 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(3):364-369
Entire regions of the metastable states for binary and single-component systems were constructed. It was established that the regions include temperature intervals from absolute zero to critical temperatures, and from vapor—condensate equilibrium to the conditions of spinodal decomposition of supersaturated vapor in the system. Algorithms for determining the regions of metastable states are presented. The data obtained on their basis are noted to coincide qualitatively with known results. Correlations found earlier are employed to calculate the critical pressures and temperatures for the binary systems in the study. 相似文献
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Institute of Chemistry of Plant Substances, Academy of Sciences Of the Republic of Uzbekistan, Tashkent, fax (3712) 89 14 75. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 503–504, May–June, 1995. Original article submitted October 31, 1994. 相似文献
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