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101.
102.
Decrease of beta-lipoprotein resistance to copper-dependent oxidation is an important diagnostic criterion of risk of atherosclerosis. We developed a simple method for assessing resistance of heparin-precipitated beta-lipoproteins to oxidation induced by 50 microM copper ions. A strong positive correlation between the oxidation of precipitated and ultracentrifuged beta-lipoproteins in the presence of 50 and 10 microM copper ions, respectively, was revealed. In coronary patients oxidation resistance of precipitated beta-lipoproteins was decreased in comparison with that in healthy donors. The method is simple, informative, and easily available for clinical biochemical laboratories. 相似文献
103.
I. N. Molchanov 《Cybernetics and Systems Analysis》1992,28(2):273-280
The paper surveys state-of-the-art supercomputer and mini supercomputer architectures. Computer development trends and the associated problems are discussed.Translated from Kibernetika i Sistemnyi Analiz, No. 2, pp. 133–141, March–April, 1992. 相似文献
104.
Medical records of 876 servicemen of a young age who have suffered various forms of clinical diphtheria were analysed. (Lethal cases were marked in 52 cases--5.9%). A true clinical symptom complex for the diagnosis of diphtheria at pre-hospital period is as following: fever, intoxication and febrinous tonsillitis. The main cause of unfavourable outcome of the disease depends on the affection of cardiovascular, central and peripheral nerve systems by diphtheritic exotoxin. The most frequent limitations during medical care were the following: error diagnosis of angina (41%), late hospitalization and late specific treatment, insufficient doses of antidiphtheric serum, inopportune diagnosis of severe aggravations (infectious toxic shock, pneumonia). 相似文献
105.
106.
The work was conducted on Wistar rats who had received orally the xenobiotic hexachlorocyclohexane (HClCH) in different doses. The sizes of the alveolar macrophages and type II pneumocytes as well as the parameters of macrophage phagocytosis were studies. Administration of HClCH in subtoxic doses not exceeding the pesticide residues in the food in the first two months stimulated synthesis of the surfactant and its phagocytosis by the alveolar macrophages; further administration of the primer led to exhaustion of the cell function. A toxic HClCH dose induced synchronous stimulation of the functional interaction of the alveolar macrophages and type II pneumocytes by the end of the second month. Synthesis of the surfactant and its phagocytosis were stabilized in the period of the after-effect of the drug. 相似文献
107.
NM Burduli IuI Buziashvili NI Kharitonova ST Matskeplishvili 《Canadian Metallurgical Quarterly》1998,76(8):22-24
193 patients with coronary heart disease were examined to study potentialities of noninvasive diagnosis of coronary artery lesions, their location and severity using transesophageal echocardiography in combination with transesophageal stimulation. This method of stress-test proved highly sensitive (89%) and specific (84%) in noninvasive diagnosis of both location of coronary atherosclerosis and its severity (stenosis, subtotal stenosis, occlusion) and extension. 相似文献
108.
EM Kuka?n LB Khazenson MP Rybkin AG Loseva IuI Bobrova 《Canadian Metallurgical Quarterly》1977,(8):106-111
Sera of healthy and sick persons were tested for the presence of secretory IgA (SIgA) and free secretory component (SC) SIgA was present in the blood of healthy persons in low concentrations (1.07 mg/100 mg), and free SC was absent. Infectious and somatic diseases, in which damage of the epithelial covering of the gastrointestinal and respriatory tracts was possible, were accompanied by increased blood SIgA content. There was also noted a distinct relationship between the blood SIgA concentration and the severity of infectious diseases and pneumonia supervention. In these cases the SIgA level proved to rise. 相似文献
109.
L. N. Molchanov 《Strength of Materials》1976,8(6):651-655
1. | In choosing a type of steel for conditions involving repeated impacts, it is essential to allow for the reliable working reserve of the structure or the constituent elements subjected to this loading. |
2. | The external form of the fractures enables us to determine the character of the breaking load. For static and single impact loading there are three zones of plastic yield situated on the three sides of the cross section (a part from the notch side). Under conditions of repeated impact loading, a fatigue crack necessarily arises, together with only two zones of plastic yield (on the vertical sides of the cross section). The area of the zones of plastic yield is much smaller than in the first two cases of loading and depends on the value of Aim. |
3. | By considering the form of the fracture surface we may judge the number of loading cycles. For a small number of cycles and a high impact energy, the final fracture zone occuples a large area, the cross section has an undulating structure, and the zones of plastic yield are considerable. For low impact energies the area occupied by the fatigue crack is greater, the final fracture less undulating, the zones of plastic yield smallish, the front of the fatigue crack directed with its convexity upward, and the relaxation lines more sparsely evident. The fractures confirm that for large impact energies the fracture bears a quasistatic character and for small energies, a fatigue character. |
4. | After 5·104 cycles and static completion of the fracture by bending all the samples had macro-or microfatigue cracks, so that the breaking load and the work required to complete the fracture by bending diminished. |
110.
Russian Engineering Research - The use of classical and parametric spectral analysis in monitoring industrial equipment—in particular, metal-cutting machines—is considered. Particular... 相似文献