Recording of extremal values as a means for excluding fluctuations and systematic measurement errors

Summary The above analysis and experimental investigations have shown that the recording of the extremal measured values in devices for controlling the parameters of a technological process can be used for excluding fluctuation with a constant sign (whose mean value is not equal to zero) when the duration of the tested process differs from that of fluctuations.     

Atherosclerosis-related remodeling of aortic relaxation to purines in the Watanabe heritable hyperlipidemic rabbit

The mechanism of the unimpaired relaxant effect of ATP in the Watanabe heritable hyperlipidemic rabbit aorta was investigated to elucidate the involvement of P2y purinoceptor at the endothelial level during atherosclerosis. Experiments were carried out on isolated thoracic aorta from such rabbits that were 12 months of age. The potent P2y purinoceptor agonist, 2-methylthio-ATP, did not induce any endothelium- or smooth muscle-dependent relaxation, thus excluding any involvement by the P2y purinoceptor. ADP, but not AMP, produced relaxation of the aorta by acting at both endothelial and smooth muscle levels. Adenosine relaxed the vessel by acting only in smooth muscle. The maintained endothelial relaxant effect of ATP and ADP is therefore not due to activation of P1 or P2y purinoceptors but may involve activation of a remodeled purinergic receptor site that emerges with the progression of atherosclerosis. This site is antagonized by methylene blue. The disorganization of the endothelial monolayer observed in the morphological analysis may be related to functional remodeling of the endothelial purinergic activity in atherosclerosis.     

p-Hg0.8Cd0.2Te based large area fast photoresistor

The design and manufacturing technology of large area fast photoresistors by drawing additional electrodes on their back side are described. The measurement of the modernized p-Hg_0.8Cd_0.2Te based pho-toresistornal has shown that its operation speed increases inversely proportional to the reduction of the distance between adjacent electrodes.     

Effect of a phase transition on the electron energy spectrum in Ag<Subscript>2</Subscript>S

Temperature dependences of electrical conductivity σ, Hall coefficient R, and thermopower α₀ in Ag₂S are reported. It is established that at T ≈ 435 ± 5 K, all kinetic parameters vary drastically, which is associated with a change in parameters of the conduction band. It is shown that the dispersion law of electron energy in β-Ag₂S corresponds to the Kane model.