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1.
Nomograms are given for claculating the dielectric constant and dielectric loss of polar liquids by measuring the standing
wave ratio for an infinitely thick layer of fluid and the layer thickness at which wave reflection is minimum.
Translated from Izmeritel'naya Tekhnika, No. 2, pp. 46–47, February, 1996. 相似文献
2.
É. R. Kasimov 《Journal of Engineering Physics and Thermophysics》2003,76(1):129-133
Equations for determining the frequency band near the frequency of selective reflectionless transmission of electromagnetic radiation by a layer of an absorbing dielectric which separates two nonabsorbing media with dissimilar optical densities have been obtained. The absorption band of the wave in the dielectric layer as a function of the dielectric properties and thickness of the layer and of the dielectric properties of the separated media has been evaluated. 相似文献
3.
The conditions of nonreflective absorption of an electromagnetic wave in its incidence, at an angle, on a plane layer of absorbing
magnetic applied to a metal substrate are found. The dependences of these conditions on the angle of incidence of the wave,
the thickness of the layer, and the magnetic properties of the coating material are investigated. The possibility of separating
a prescribed polarization component of the incident radiation with the use of the phenomenon of nonreflective wave absorption
in the magnetic–metal system is considered. 相似文献
4.
5.
A previous study reported that intercellular adhesion molecule-1 (ICAM-1) expression by human vascular endothelial cells (HUVEC) is augmented by intracellular signal transmission mainly through the protein kinase C (PKC) system stimulated by TXA2 receptors. In the present study, we show that a TXA2 receptor agonist, U46619, augments the expression of not only ICAM-1, but also vascular cell adhesion molecule-1 (VCAM-1) or endothelial leucocyte adhesion molecule-1 (ELAM-1) in HUVEC both at protein and mRNA levels. Pretreatment with SQ29,548 (a TXA2 receptor antagonist) or PKC inhibitors greatly diminished the extent of U46619-induced mRNA accumulation and surface expression of the adhesion molecules. An inhibitor of nuclear factor kappaB (NF-kappaB) activation, PDTC, diminishes U46619-induced VCAM-1 mRNA accumulation. NAC, which inhibits NF-kappaB and activation protein 1 (AP-1) binding activity, inhibits the expression of ICAM-1 or ELAM-1 at protein and mRNA levels. These findings suggest that ICAM-1 or ELAM-1 expression of HUVEC stimulated via TXA2 receptors is augmented by induction of NF-kappaB and AP-1 binding activity through the PKC system, and that VCAM-1 expression is augmented by induction of NF-kappaB binding activity. 相似文献
6.
R. M. Kasimov 《Measurement Techniques》1970,13(10):1546-1548
Conclusions Owing to the use of nomograms the above method is universal and rapid. It is independent of the frequency at which the values of and are measured, and it is equally applicable for measuring dielectric parameters of polar liquids which are highly absorbent at ultrahigh frequencies and have one or two clearly expressed minima in the relationship of tol, and for liquids with low dielectric losses in the uhf range, whose measurement with adequate precision is difficult by other methods. Among the deficiencies of the suggested method one should note the two values obtained for d and tan /2 from the nomogram readings. However, this deficiency can easlly eliminated either by comparing the two values for d and tan /2 with those obtained for them from a similar nomogram and the second minimum in the relationship of tol, or by an approximate evaluation of d and tan /2 by means of any other less precise measuring method.Translated from Izmeritel'naya Tekhnika, No. 10, pp. 48–49, October, 1970. 相似文献
7.
8.
A. N. Shel'pyakov A. M. Kasimov G. P. Isupov 《Journal of Engineering Physics and Thermophysics》1983,45(4):1106-1108
The formation of two conical flows in the transition from laminar flow to the turbulent part of a free jet under the action of acoustic oscillations is observed experimentally. 相似文献
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