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排序方式: 共有314条查询结果,搜索用时 15 毫秒
21.
F. A. Akopov E. S. Lukin V. V. Milyavskii A. S. Savinykh L. B. Borovkova T. I. Borodina G. E. Val’yano V. S. Ziborov N. A. Popova 《Refractories and Industrial Ceramics》2012,52(5):349-354
Technology is described for manufacturing dense ceramic from very fine powder based on zirconium dioxide partly stabilized
with yttrium oxide. Some engineering properties of the manufactured ceramic are defined. Its microstructure and phase composition
are studied. Ceramic properties with impact-wave loading are studied, and values of dynamic elastic limit and spalling strength
are obtained. 相似文献
22.
L. M. Delitsyn A. S. Vlasov T. I. Borodina N. N. Ezhova S. V. Sudareva 《Thermal Engineering》2013,60(4):231-238
The possibility of full 100% usage of ash from coal-fired thermal power stations for producing raw materials for the cement and alumina industries is considered, and it is shown that comprehensive processing of ash from coal-fired thermal power stations is required for this purpose. 相似文献
23.
24.
A. G. Demishev V. Z. Suplin N. N. Borodina 《Journal of Engineering Physics and Thermophysics》1985,49(4):1202-1208
A mathematical model of radiative heat exchange in the throats of wide-necked helium cryostats is analyzed. A comparison of the numerical results with known calculated and experimental data shows their good agreement.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 49, No. 4, pp. 627–634, October, 1985. 相似文献
25.
Yu. V. Gulyaev I. E. Kuznetsova B. D. Zaitsev S. G. Joshi I. A. Borodina 《Technical Physics Letters》1999,25(4):302-303
The influence of a thin layer of arbitrary conductivity on the characteristics of acoustic waves in potassium niobate is investigated
theoretically. The conductivity of a thin layer on the surface of a potassium niobate crystal or plate is shown to have a
significant influence on the damping and velocity not only of symmetric Lamb waves and quasi-shear-horizontal waves but also
of Gulyaev-Bleustein waves. It is found that a relative change in velocity as large as 50% can be achieved for quasi-shear-horizontal
waves by altering the surface conductivity. The results obtained reveal great prospects of using potassium niobate to create
acoustoelectronic devices with controllable characteristics.
Pis’ma Zh. Tekh. Fiz. 25, 21–26 (April 26, 1999) 相似文献
26.
ON Semiconductor 《电源世界》2011,(5):52-54
本文介绍了安森美半导体用于车载网络的创新解决方案,包括CAN收发器NCV7341,LIN收发器NCV7321,以及系统级芯片NCV7420/25 LIN-SBC等。 相似文献
27.
28.
VG Savchenko EN Parovichnikova VG Isaev IA Demidova RG Kuliev EO Gribanova GA Kliasova RA Kucher AN Sokolov KS Momotiuk IuV Ol''shanskaia NG Tiurina LIu Tikhonova GM Galstian VM Budianski? EA Belousov VA Lapin SV Voloshin TS Konstaninova LB Filatov ON Porokhina EA Smirnova 《Canadian Metallurgical Quarterly》1998,70(7):5-11
29.
IuP Altukhov EIu Pobedonostseva LP Filatova TV Malinina NSh Lapteva AI Grigor''ev ON Larina 《Canadian Metallurgical Quarterly》1998,361(5):709-711
Currently, the treatment of falciparum malaria is seriously compromised by spreading drug resistance. We studied the effects of camptothecin, a potent and specific topoisomerase I inhibitor, on erythrocytic malaria parasites in vitro. In Plasmodium falciparum, camptothecin trapped protein-DNA complexes, inhibited nucleic acid biosynthesis, and was cytotoxic. These results provide proof for the concept that topoisomerase I is a vulnerable target for new antimalarial drug development. 相似文献
30.
P Xia PM Bungay CC Gibson ON Kovbasnjuk KR Spring 《Canadian Metallurgical Quarterly》1998,74(6):3302-3312
The diffusion coefficients of two caged fluorescent dyes were measured in free solution and in the lateral intercellular spaces (LIS) of cultured Madin-Darby canine kidney (MDCK) cells after photoactivation by illumination with a continuous or pulsed UV laser. Both quantitative video imaging and a new photometric method were utilized to determine the rates of diffusion of the caged fluorescent dyes: 8-((4,5-dimethoxy-2-nitrobenzyl)oxy)pyrene-1,3,6-trisulfonic acid (DMNB-HPTS) and (4,5-dimethoxy-2-nitrobenzyl) fluorescein dextran (10,000 MW) (DMNB-caged fluorescein dextran). The diffusion coefficients at 37 degrees C in free solution were 3.3 x 10(-6) cm2/s (HPTS) and 0.98 x 10(-6) cm2/s (10,000 MW dextran). Diffusion of HPTS within nominally linear stretches of the LIS of MDCK cells grown on glass coverslips was indistinguishable from that in free solution, whereas dextran showed a 1.6 +/- 0.5-fold reduction in diffusivity. Measurements of HPTS diffusion within the LIS of multicellular regions also exhibited a diffusivity comparable to the free solution value. The restriction to diffusion of the dextran within the LIS may be due to molecular hindrance. 相似文献