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1.
The crystal structure of [NpO2{OC(NH2)2}5]ClO4·H2O and [NpO2Cl{OC(NH2)2}4] was studied by X-ray diffraction. The electronic absorption spectra of these complexes were recorded. The coordination polyhedron of Np in both complexes is a distorted pentagonal bipyramid. There is no cation-cation interaction of neptunyl cations in these complexes. 相似文献
2.
The main phase transformations during synthesis of β‐sialon from kaolin of the Prosyanovskii deposit (Ukraine) under test-industrial production conditions have been studied. Sialon was prepared by carbothermal reduction in graphite-tube furnaces in nitrogen. It is shown that the process is characterized by the simultaneous occurrence of several chemical reactions with formation of intermediate phases (Si2ON2, X1‐phase), silicon carbide, and (apart from β‐sialon) sialons based on AlN polytypes. The phase composition of the final product is determined not only by the charge composition but also by the set of production parameters. Results of the work may provide a basis for commercial preparation of sialon powder. 相似文献
3.
A. V. Zrodnikov G. I. Toshinskii O. G. Grigor'ev Yu. G. Dragunov V. S. Stepanov N. N. Klimov I. I. Kopytov V. N. Krushel'nitskii A. A. Grudakov 《Atomic Energy》2004,97(2):528-533
The results of development work on the SVBR-75/100 modular fast reactor cooled by lead–bismuth coolant are presented. The design is based on the experience gained operating reactors in nuclear-powered submarines. The SVBR-75/100 reactor is inherently safe because of its low power, the chemical inertness and high boiling point of the lead–bismuth coolant, and the integrated basin-type arrangement of the first-loop equipment. This eliminates the conflict between the safety and economic requirements that is characteristic of conventional-type reactors. The lower power makes it possible to build the reactor in a factory and deliver the reactor using any form of transportation to the nuclear power plant site. All safety systems operate passively. Most of these systems are used as normal-operating systems. This creates conditions for multipurpose applications of such reactor modules in developed and developing countries. 相似文献
4.
This article considers a discrete sequential multilevel automated system for recording electron-diffraction patterns. A comparative
analysis is presented, along with experimental results that make it possible to evaluate the effectiveness of the technical
decisions on which the device is based. The general design of the system is presented.
Translated from Izmeritel'naya Tekhnika No. 5, pp. 16–18, May, 1996. 相似文献
5.
S. I. Glinchak Yu. A. Egorov R. R. Aliev E. D. Radchenko B. K. Nefedov N. A. Grigor'ev 《Chemistry and Technology of Fuels and Oils》1992,28(3):175-177
Translated from Khimiya i Tekhonologiy Topliv i Masel, No. 3, pp. 33–34, March, 1992. 相似文献
6.
TK Cherniaeva NA Matveeva IuG Kuzmichev MP Gracheva 《Canadian Metallurgical Quarterly》1997,36(3):26-28
Nuchal screening has the following advantages: Non invasive. First trimester procedure. Results are obtained quickly. 80-90% detection rate for Down's Syndrome. 相似文献
7.
B. A. Grigor'ev I. M. Abdulagatov D. S. Kurumov Yu. L. Vasil'ev 《Journal of Engineering Physics and Thermophysics》1986,51(4):1218-1221
Using the method of equivalent equations we obtain improved (true) values for the parameters of the spherical shell potential for n-pentane.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 51, No. 4, pp. 529–633, October, 1986. 相似文献
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10.
V. A. Chernyakhovskii V. F. Konstantinov I. V. Grigor'ev M. D. Karaseva L. I. Krigman 《Refractories and Industrial Ceramics》1991,32(1-2):83-86
Conclusions New and effective refractories have been developed whose physicotechnical and working parameters are better than those of existing Soviet and foreign materials. Commercial production of them has been organized.MKFU-83 and KKFU-76 refractories increase mixer lining resistance by substantial factors and reduce the number of repair cycles and the material and labor costs, while increasing the metal output. The refractories are recommended for use in steel-melting processes (electric furnaces and buckets).Translated from Ogneupory, No. 2, pp. 24–26, February, 1991. 相似文献