钛铁矿制备的SO_4~（2－）／TiO_2型固体超强酸在酯化反应中的催化活性

以钛铁矿为原料制备了ＳＯ４２－／ＴｉＯ２固体超强酸型他化剂，结果表明其在乙酸和乙醇酯化反应中具有明显的催化活性。     

醌氢醌玻碳修饰电极的性能研究与应用

本文详细地研究了醌氢醌玻碳修饰电极的催化活性以及用该电极测定抗坏血酸的条件,测定结果非常理想。     

铬-铈氧化物的催化活性和掺碱(土)元素的影响

研究了Cr-Ce二元氧化物催化剂对甲苯完全氧化的性能,以及掺碱(±)金属元素对其活性的影响。实验表明Cr/Cr Ce(原子比)在0.5—0.7时,催化剂有最佳活性。碱(±)金属元素的掺加,改善了Cr-Ce体系对甲苯完全氧化反应的活性,并随掺入元素的碱性增大而提高。其中以钾的掺入效果最优,钾含量的增加,氧化活性随之提高,在K/Cr Ce(原子比)=0.05—0.10时最佳,再增大钾的含量,无益于催化剂活性的改善。     

The effects of temperature on ATPase activity and force generation in skinned muscle fibers from the Pacific blue marlin (Makaira nigricans)

Summary ATPase activity and force generation have been measured simultaneously in isolated, demembranated muscle fibers of the Pacific blue marlin (Makaira nigricans) between 0 and 30°C. Tension generation is relatively independent of temperature above 15°C and falls with a Q₁₀ of <1.5 on decreasing the temperature to 0°C. In contrast, the Q₁₀ for ATPase activity is 2.2 over the range 0–30°C. The results are interpreted in terms of the cross bridge theory of contraction.     

Both thermal and nociceptive afferents influence the unit activity of the neurons in the corpus striatum

Summary Both thermal and nociceptive stimulation in the periphery were shown to influence the neuronal activity recorded in the striatal area. Both the thermal and nociceptive sensitivity of the striatal neurons were closely related.The authors are grateful to the Alexander von Humboldt-Stiftung (Bad Godesberg, Bonn, Federal Republic of Germany) for donations of the necessary equipment for the present study. The research reported here was supported by grants from the National Science Council (Taipei, Taiwan, Republic of China)     

法莫替丁对鼠胃肠肌电活动的影响

观察１２只大鼠法莫替丁对体胃肠肌电活动的影响，结果发现：腹腔注射法莫替丁５ｍｉｎ左右胃窦肌电活动开始增强，４０ｍｉｎ慢皮和快波振幅明显增大；十二指肠电活动除快经有所提高外，漫波频率、慢波和快波振幅均未见明显改变。提示法莫替丁可兴奋胃窦肌电活动     

气液色谱法测定有机溶质在碳酸丙烯酯-NaI溶液中的活度系数

<正> 本文报导了298.15、303.15、308.15、313.15K时,正已烷、苯、四氯化碳、氯仿、二氯甲烷在碳酸丙烯酯(PC)-NaI溶液中的无限稀释活度系数γ_1~∞和盐效应常数的气液色谱(GLC)法测定结果。并考察了温度的影响。     

茶油烷醇酰胺的制备及其表面活性

茶油和甲醇反应生成茶油脂肪酸甲酯，再和二乙醇胺反应得到茶油烷醇酰胺。测定了它的表面张力、发泡力、润湿力、浮化力、钙皂分散力。结果表明：茶油烷醇酰胺具有良好的表面活性。     

Induction of the synthesis of thymidine kinase by aldosterone in the kidney of the immature male rat

Summary Thymidine kinase activity was studied in kidneys from immature male rats after administration of aldosterone. Kinetic studies showed that the enzyme activity reached its maximum level 24 h after aldosterone injection. That increase was specific for aldosterone and could be related to the synthesis of new molecules of enzyme.     

氟化氢熏气对蚕豆叶片的影响（Ⅱ）

蚕豆受氟化氢污染后,叶片含氟量与硝酸还原酶活性呈显著负相关,总氮含量也明显下降.叶绿素a、b含量下降.叶片亚细胞器也受到破坏.叶片边缘和尖端出现典型的褐色坏死伤斑,造成蚕豆产量和品质下降.