矿物质添加剂对动物性别影响的研究第一报─—锌和镁对仔鼠性别的影响

对小鼠、兔、乃至牛等动物进行系列矿物质添加剂影响动物性别的研究。通过初步实验，证实在成鼠饲料中加入５００ｐｐｍＺｎＯ或５００ｐｐｎＭｇＯ皆能使仔鼠雌性显著增多；在饲料中加入５００ｐｐｍＺｎＯ和５００ｐｐｍＭｇＯ，在后代性别上二者之间无显著差异。     

痢特灵对大鼠朿缚——水浴性胃溃疡的保护作用

痢特灵对消化性溃疡及幽门结扎胃溃疡的作用,以前已有报导;此作用可能与痢特灵抑制胃酸分泌有关。本实验将大鼠束缚于网络板上,置于26℃～27℃水中六小时,使大鼠胃粘膜受损。实验证明痢特灵对束缚-水浴性胃溃疡(应激性溃疡)也有保护作用。此作用不被消炎痛(具有抑制胃粘膜内源性合成前列腺素的作用)所阻断。此结果表明痢特灵的细胞保护作用不是通过抑制胃粘膜合成前列腺素而致。此外,我们用放射免疫法测定了大鼠血清胃泌素含量,发现痢特灵具有抑制本实验条件下胃泌素分泌的作用。我们认为痢特灵细胞保护作用的机理很可能是抑制胃泌素的合成和分泌。     

棉酚衍生物对雌性大鼠的局部抗早孕作用

本文报道了六种毒性低于棉酚的酚醛类化合物对雌性大鼠的抗生育作用。将妊娠大鼠按不同药物及不同剂量分组,在动物妊娠第七天,分别在子宫内注入棉酚衍生物,于妊娠第14天剖腹观察宫内胚胎情况。结果表明,六种棉酚衍生物在剂量大于棉酚抗早孕药量一倍时,均有显著的抗早孕作用。抗早孕率为95—100%。与棉酚同剂量时,其中三种的抗早孕作用显著下降,抗早孕率低干55%。2,4二羟基荼醛的抗早孕作用也显著低于棉酚。酚醛类 NC009的抗早孕作用虽然很强。但局部刺激症状严重,似不宜作局部抗生育药。酚醛类 NS013具有明显的抗早孕作用,当与棉酚同剂量时,抗孕作用超过棉酚。剂量为棉酚的2/3时,抗早孕率为95.7%,当剂量为棉酚的1/2时,抗早孕率为89.4%。由此可见,毒性低于棉酚的酚醛类 NS013有希望代替棉酚作为女性局部抗生育药物。即代替手术作为人工流产的药物。     

Relationship between DNA and cholesterol synthesis in kidney after refeeding

Summary DNA and cholesterol synthesis were investigated in the kidneys of fasted-refed rats. Refeeding resulted in an increase in kidney DNA synthesis, as measured by³H-thymidine incorporation, starting at 72 h. The increase in DNA synthesis was accompanied by a stimulation of cholesterol synthesis, as measured by¹⁴C-acetate incorporation into cholesterol.     

早期分流手术对脑积水大鼠学习能力的影响

研究先天性脑积水早期分流手术对学习能力的影响。采扁分流术组及不实施手术治疗组，用morris水迷宫和旷场观察21d时各组大鼠的空间学习能力，资料用one and two way AVONA和t-检验分析。在两组实施分流术的脑积水大鼠中，表现未见显著的不同，但与脑积沓大鼠比较有显著意义。脑积水大鼠早期分流手术能显著提高学习能力，但是早期发生脑积水的一些症状不能逆转。     

灵芝对大鼠过氧化损伤的保护作用

以大鼠为试验动物研究表明：灵芝提取物能有效提高心，脑组织超氧化物歧化酶（SOD）活性，降低过氧化脂质（LPO）和脂褐素含量，具有明显的抗氧化，抗自由基作用，从而对心脑组织的过氧化损伤起保护作用。     

Effects of puromycin on rat embryos in vitro

Summary Somite-staged rat embryos were exposed to varying concentrations of puromycin for 48 h in vitro. Medium concentrations below 0.92 M had no significant effects, while concentrations above 1.84 M were lethal. Between these extremes, there were concentration dependent increases in the incidence of malformations in a close relationship to growth retardation.     

实验性大鼠念珠菌病的血液学和生物化学指标的观察

通过Ｗｉｓｔａｒ大鼠尾静脉注入白色念珠菌,建立了大鼠念珠菌病实验动物模型。并较系统地观察了念珠菌病的心、肝和肾等脏器的生物化学指标的变化情况,进行了血细胞分析,结果提示白色念珠菌对心,肝和肾等脏器的功能均有不同程度的损害;通过进行真菌培养计数,测定了血液对白色念珠菌的清除速度;本文还观察了不同感染剂量大鼠的存活情况。     

Acute60Co-gamma irradiation of rats decreases the inhibitory effect of succinate on the lipid peroxidation of liver mitochondria

Summary Succinate inhibits NADPH-dependent lipid peroxidation of liver mitochondria. This effect of succinate decreased 12 h after whole-body⁶⁰Co-gamma irradiation, depending on the dose of irradiation.     

Stimulation of histamine synthesis in rat mast cells by compound 48/80 in vitro

Summary The histamine content of rat peritoneal fluid cells is doubled within 20 min by 0.5 g/ml of compound 48/80. Histamine catabolism inhibitors do not reproduce this effect; cells pre-incubated with -fluoromethylhistidine are unresponsive to compound 48/80 which therefore activates pre-formed histidine decarboxylase rather than inducing it. Non-mast cells showed no change after treatment with compound 48/80.