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1.
Interatomic distances and distributions of rare-earth and strontium cations over two sites in the structure of (La1?x Hox)2SrAl2O7 solid solutions were determined by means of full-profile X-ray structural analysis. Introduction of holmium cations into the La2SrAl2O7 oxide results in ordered distribution of Ln3+ cations and stabilization of the perovskite-like structure. 相似文献
2.
E. A. Dikusar N. G. Kozlov V. I. Potkin T. D. Zvereva A. P. Yuvchenko M. P. Bei N. V. Kovganko 《Chemistry of Natural Compounds》2006,42(5):539-542
Previously unreported esters 1b–20b were synthesized from natural terpene alcohols, sterols, plant phenols, and camphar oxime (1a–20a) by reaction with o-carborane-C-carboxylic acid chloride.
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Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 434–436, September–October, 2006. 相似文献
3.
O. S. Kukovinets T. I. Zvereva V. G. Kasradze F. Z. Galin L. L. Frolova A. V. Kuchin L. V. Spirikhin M. I. Abdullin 《Chemistry of Natural Compounds》2006,42(2):216-218
An effective method was proposed for synthesizing (+)-cis-1R-acetoxymethyl-3-isopropenyl-2,2-dimethylcyclobutane, a pheromone of the citrus mealybug, based on ozonolysis of verbenone
that led in one step to the key synthon 1R,3S-3-acetyl-2,2-dimethylcyclobutanecarboxylic acid.
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Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 179–180, March–April, 2006. 相似文献
4.
N. A. Zhukovskaya E. A. Dikusar V. I. Potkin S. K. Petkevich T. D. Zvereva Yu. S. Zubenko D. A. Rudakov V. L. Shirokii 《Russian Journal of General Chemistry》2013,83(3):542-544
Oximes of β-isatin, isoxazole- and ferrocene-containing ketones, o- and m-carborane alcohols react with isoxazol- and isothiazolecarboxylic acid chlorides in the presence of triethylamine to afford the corresponding esters. 相似文献
5.
The results of environmental assessment of ash ponds of thermal power plants in Vladivostok and Khabarovsk are given. High radioactivity of coal in the Russian Far East is responsible for the accumulation of radionuclides in the fly and bottom ashes, which leads to pollution of atmosphere, lithosphere, biosphere, and hydrosphere with toxic and radioactive elements. Runoff carries these elements to the Ussuri Bay of the Sea of Japan. Harmful effect of these wastes on human health is noted, and possible ways of their utilization have been recommended. 相似文献
6.
E. A. Dikusar V. I. Potkin T. D. Zvereva N. A. Zhukovskaya S. K. Petkevich A. S. Pavlyuchenkova M. Yu. Murashova A. P. Polikarpov A. A. Shunkevich A. P. Yuvchenko R. M. Zolotar’ 《Russian Journal of Organic Chemistry》2013,49(2):221-227
By the condensation of substituted aldehydes of vanillin series with 1,3-propanediol in boiling benzene in the presence of sulfo cation exchanger FIBAN K-1 as catalyst functionally 2-R-substituted 1,3-dioxanes were synthesized. 相似文献
7.
The energy and spectral characteristics of a barrier discharge in a mixture of iodine vapor with krypton have been investigated theoretically and experimentally. The emission spectrum consists of the single I*2 molecular band D′ → A′ peaking at 342 nm, the iodine resonance line at 206.2 nm, and the group of bands corresponding to iodine emission. The highest intensity of the I*2 (342 nm) band was obtained at a mixture pressure near 450 Torr. A mean output power and an efficiency of 550 mW and 1.6%, respectively, have been achieved. It is shown that, for the I2 barrier-discharge excilamp, the homogeneous, rather than filamentary form of discharge glow is optimal from the viewpoint of the highest mean output power. The maximal calculated value of the emission efficiency for the 342-nm band was 5%. The main processes determining energy losses in plasma have been found, and ways to increase the efficiency of emission in the D′ → A′ band of the I*2 molecule have been proposed. 相似文献
8.
Kazakova E. F. Dmitrieva N. E. Zvereva N. L. 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2020,94(2):341-344
Russian Journal of Physical Chemistry A - Rapidly quenched alloys of aluminum with cobalt and zirconium are investigated using a combination of means of physicochemical analysis to study the... 相似文献
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