Effects of prolonged administration of high molecular levan on arterial blood gases, oxygen transport and acid base balance in rabbits.

The effect of daily intraperitoneal injections of 100 mg of high molecular levan for 4-6 weeks on a number of physiological parameters was studied in rabbits. The parameters studied included whole blood pH, blood gases and acid-base balance. Control rabbits were similarly treated with physiological saline. In five rabbits T-50 was determined after levan treatment. None of the studied parameters was significantly affected by the levan treatment.     

Effects of prolonged administration of high molecular levan on hematological parameters in rabbits

Rabbits were injected intraperitoneally with 100 mg of high molecular levan, daily for 4--6 weeks. Study of various hematological parameters revealed that the treatment resulted in the following changes: 1. Marked elevation in fibrinogen levels and in the number of platelets. 2. Insignificant changes in the intrinsic and extrinsic clotting mechanisms and in platelet aggregation. 3. Some reduction in the number of circulating RBCs. The findings indicate that levan treatment has no obvious effect on hematologic functions, except for the increase in fibrinogen and platelets and the slight decrease in circulating RBCs.     

绿色功夫和锐劲特对食用菌害虫的防治效果测定

室内毒力测定和菇房药效试验表明,绿色功夫和锐劲特对食用菌害虫眼蕈蚊和果蝇有较强的毒力和较好的防治效果。绿色功夫对眼蕈蚊和果蝇的ＬＣ５０分别为５．０８ｍｇ／Ｌ和２．４５ｍｇ／Ｌ。锐劲竺对眼蕈蚊和果蝇的ＬＣ５０分别为８．７５ｍｇ／Ｌ和８．５０ｍｇ／Ｌ。菇房防治效果显示：用质量浓度１２．５ｍｇ／Ｌ和６．２５ｍｇ／Ｌ的绿色功夫液浇淋和务菌代防治效果达８８．６％、８１．８％和７５．９％、６５．１％。用质量浓     

Aging effects on the liver aldolase of rabbits (Short Communication)

A chemical method is used to determine the amount of aldolase sequence in rabbit livers. It is demonstrated that the aldolase sequences of the livers of young rabbits are more efficient catalytically than are those from the livers of old rabbits. The presence of altered residues in the aldolase sequences of old animals may account for these observations.     

Effect of prolonged intermittent thyrotropin-releasing hormone administration to fetal and neonatal rats.

Fetal and neonatal rats received daily subcutaneous injections of 10 microgram thyrotropin-releasing hormone (TRH) until 7 or 14 days postnatally. At 70 days the pups were challenged with 1 microgram TRH intravenously via an indwelling jugular cannula. Basal serum thyroxine, triiodothyronine, and thyroid-stimulating hormone (TSH) concentrations did not differ among the three groups. The mean TSH responses as determined by the mean peak TSH concentration and the total TSH response as determined by planimetry were not significantly different, and there was no significant difference in pituitary TSH content following the TRH challenge among the three groups. This study suggests that the integrity of the hypothalamo--pituitary axis in adult rats cannot be affected by the repeated administration of pharmacologic doses of TRH during the perinatal period.