排序方式: 共有18条查询结果,搜索用时 15 毫秒
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M. I. Andrusenko I. G. Zozulia G. A. Iena V. V. Torhonskyy V. A. Shovgun 《Radioelectronics and Communications Systems》2012,55(1):18-24
Peculiarities of practical design of a wideband detector of pulse radar signals with unknown shape based on real-time spectrum
analyzer to be used in passive radars are considered. Quality figures for such detector are obtained using simulation on a
PC. Validity of the obtained estimates is proven by testing performed in a prototype unit. 相似文献
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AG Kats VV Afanas'ev IaM Biberman IF Romacheva VS Starodubtsev MB Shvyrkov 《Canadian Metallurgical Quarterly》1998,77(4):67-68
Analysis of the results of examinations in oral surgery making use of tests in 319 fourth-year students showed that such a method of assessing students' knowledge is highly objective. 相似文献
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GB Khonelidze IaM Kamyshov II Moish IV Bidiak VI Krachun 《Canadian Metallurgical Quarterly》1977,23(8):86-89
In 176 ambulatory patients with cancer and inflammatory diseases of the lung the initial parameters of acid-base balance and blood gases were studied. Metabolic acidosis was found in 29.5%, alkalosis--in 54.5%, the values of acid-base balance and blood gases were normal in 15.9% of patients. The degree of bronchoscopy risk under narcosis in ambulatory patients is directly proportional to the kind, character and intensity of disorders in oxidation-reduction processes. Deep, hardly compensated or decompensated disorders in acid-base balance and gas metabolism in pH values higher than 7.54 and lower the 7.26, BE (buffer base shift)--higher than 4.0 meq/1 and lower than 6.0 meq/l, and pO2 lower than 65 mm Hg are the criteria of high risk of bronchological investigation under anesthesia in ambulatory oncological patients. 相似文献
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VIu Sloventantor MV Poluéktova IaM Khmelevski? AM Poverenny? 《Canadian Metallurgical Quarterly》1996,(12):32-34
Changes in the levels of free myoglobin and lipid peroxidation products (hydroperoxides and malonic dialdehyde) were studied in cancer patients. Their baseline levels were found to be higher in patients with cancer of the lung, large bowel, and rectum than those in controls, which indicates higher lipid peroxidation, which led to the destabilization of cellular membranes and seems to cause baseline hypermyoglobinemia. There was a drastic rise in the levels of free myoglobin in the first 24 postoperative hours. The duration and severity of hypermyoglobinemia were much higher in the complicated than uncomplicated postoperative period. There was a less rise in malonic dialdehyde concentrations, whose peak was observed on days 1-2 postsurgery. The content of hydroperoxides decreased in the first 24 postoperative hours and began gradually increased from day 2. The correlation between the concentrations of myoglobin and malonic dialdehyde suggests that there is an association between hypermyoglobinemia and the status of cellular membranes. 相似文献
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IaM Matvi?chuk 《Canadian Metallurgical Quarterly》1998,6(3):98-99
Overall ninety-eight patients with autoimmune thyroiditis (AIT) were studied for the condition of upper respiratory and digestive tracts depending on the hormonal status of the thyroid gland. AIT patients display characteristic alterations in ENT organs, which were found to correlate with the thyroid levels of hormones. 相似文献
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IIa Khorlin VV Vertiev IaM Ezepchuk IM Privalova LD Kvaratskheliia 《Canadian Metallurgical Quarterly》1975,40(4):819-823
Enzymatic properties of neuraminidase isolated from non-toxigenic strain C7 of diphteritic bacteria are studied. The enzyme has the pH optimum 5.5--6.0 in acetate buffer and the temperature optimum 38 degrees C. Neuraminidase has the highest substrate affinity to glycoproteins of equine blood serum, the lowest affinity--to 3-N-acetylneuraminosyllactose and ovomucin. The Km values was 4.3-10(-4) at optimal conditions under the hydrolysis of 3-N-acetylneuraminosyllactose, Vm was 0.05+/-0.02 muM NANA/hour/mg of protein. The following esters of N-glyconoyl-glycine were shown to be competitive inhibitors of neuraminidase: 1) methyl ester of 3-aza-4-oxo-2,3,4-trideoxy-D-arabinooctonic acid; 2) methyl ester of 3-aza-4-oxo-2,3,4-trideoxy-D-glucoheptodecanic acid; 3) methyl ester of 3-aza-4-oxo-2,3,4-trideoxy-D-galactonic acid; 4) methyl ester of 3-aza-4-oxo-2,3,4-trideoxy-D-gluconic acid, Ki values being 6.5-10(-4), 4.5-10(-4); 9.5-10(-4) and 7.1-(10-3) M, respectively. 相似文献
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