用于MR16 LED灯的简单、可配置LED驱动器应用设计

本文介绍了利用驱动器CAT4201构成的高能效MR16 LED灯驱动器解决方案,MR16 LED灯具有明显的优越性,可以替代MR16卤素灯。     

Effect of inorganic fluorine compounds on the functional state of the pituitary-testis system

The radioimmunological method was applied to the study of blood testosterone, LH, and FSH content in 41 men suffering from fluorosis, aged from 33 to 45 years. Nineteen men who had no contact with fluorine compounds served as control. In comparison with healthy individuals testosterone content proved to be decreased and FSH content elevated in patients with fluorosis. Blood LH content was increased only in those patients with fluorosis who had long contact with fluorine compounds (over 15 years). The changes in the blood hormone concentration were connected with disturbances of the hormonal, and, possibly, of the germenative function of the testes. The hypophysis proved to suffer less, and the changes of its function were apparently secondary in character.     

Effect of Thawing Rate on the Exudate Production of Frozen Beef

The effect of thawing rate on the amount of exudate produced was analyzed. Increments of the thawing time (reduction of the thawing rate) led to a decrease of exudate production. The results obtained by measuring the exudate volume produced at different times after thawing and histological experiences suggested that exudate production was a consequence of the incomplete reabsorption of the extracellular water. A heat transfer model with simultaneous thawing was used for calculating the operating conditions leading to low exudate production.     

Clinical and laboratory characteristics of cryptosporidiosis in Turkmenistan

AIM: The study of clinical symptoms of gastrointestinal lesions in subjects invaded with cryptosporidia. MATERIALS AND METHODS: From 1994 to 1997 383 patients with monocryptosporidiasis were observed. 75.7% of them were children. Cryptosporidia oocysts were identified in fecalia using Fulleborn technique. The specimens were stained according to Cill-Nilsson. RESULTS: Clinically, the invasion was characterized by acute onset, severe course in children, involvement of the whole gastrointestinal and respiratory tracts. CONCLUSION: Monocryptosporidiasis runs in Turkmenistan a more severe course compared to countries with moderately hot climate.