光周期对环青春期雄性根田鼠血浆睾酮及雌二醇含量的作用

根田鼠母体妊娠期（GP）及哺乳期（LP）光周期处理对环青春期雄体血浆睾酮的作用不显著（P＞0．05）；在断乳期（PP），光周期处理则存在极显著的作用（P＜0．01）。在断乳前的GP及LP，母体长光照处理对子代雄体睾酮有抑制作用；而在PP，长光照处理对子代雄体睾酮则有显著促进作用。在LP，母体长光照处理对雄体血浆雄二醇有显著（P＜0．05）促进作用。而在PP，长光周期处理对雄体血浆雌二醇则有抑制作用。     

Quantal transmitter secretion from myocytes loaded with acetylcholine.

It is well known that transmitter secretion requires specialized secretory organelles, the synaptic vesicles, for the packaging, storage and exocytotic release of the transmitter. Here we report that when acetylcholine (ACh) is loaded into an isolated Xenopus myocyte, there is spontaneous quantal release of ACh from the myocyte which results in activation of its own surface ACh channels and the appearance of membrane currents resembling miniature endplate currents. This myocyte secretion probably reflects Ca(2+)-regulated exocytosis of ACh-filled cytoplasmic compartments. Furthermore, step depolarization of the myocyte membrane triggers evoked ACh release from the myocyte with a weak excitation-secretion coupling. These findings suggest that quantal transmitter secretion does not require secretory pathways unique to neurons and that the essence of presynaptic differentiation may reside in the provision of transmitter supply and modification of the preexisting secretion pathway.     

Effect of volatile anesthetics on the circular dichroism of bilirubin bound to human serum albumin

The characteristic circular dichroism of bilirubin bound to human serum albumin undergoes a remarkable sign inversion on addition of halothane, chloroform and other volatile anesthetics. This sign inversion, which is completely reversed by removal of the anesthetic, reflects a pronounced conformational change of the bound ligand; probably a complete inversion of chirality. The observation suggests that association of volatile anesthetics with proteins can markedly alter the internal topography of receptor sites and potentially influence the stereoselectivity of ligand binding.     

日本坂神地震中房屋结构的震害及教训

介绍了钢筋混凝土结构，钢结构和钢骨钢筋混凝土结构建筑在坂神地震中的破坏情况，了建筑结构的震害与建筑年代及建筑规范的变迁有关，高层建筑中的薄弱层和东同结构型式的转换层是震害的集中部位。     

田径理论与技术教学CAI课件的研制与实践

田径教学是体育院、系教学的重点.当前,由于教学时数的减少,以往常规的教学手段已不能很好地完成教学任务,而利用建立在计算机技术基础之上的CAI则能很好地解决田径教学中存在的问题.对田径教学CAI课件的研制与实践过程进行了初步探讨.     

TiO2对合成渣中Fe2O3还原发泡过程的影响

研究了不同条件下TiO2和Fe2O3在合成渣中被碳还原时的发泡过程．计算了该发泡过程的发泡系数、消泡系数、平均发泡寿命、发泡强度和消泡过程开始的时间．用熔渣发泡参数定量地讨论了温度、TiO2加入量和初渣中TiC的含量对熔渣发泡过程的影响，发现当初渣中TiC的含量和TiO2加入量较多时，在发泡时会产生二次发泡现象．     

径向电磁离合器

一种新型结构的电磁离合器 ,可替代电磁联轴器。文中对这种离合器的工作原理、结构设计、参数选取和传动扭矩作了分析并给出了一种结构型式。试验样机证实了其工作原理的正确     

Host cell reactivation of ozone-treated T3 bacteriophage by different strains ofEscherichia coli

Summary Host cell reactivation capacity for ozone T3 phage was determined for differentE. coli strains deficient in one or more of the DNA repair mechanisms. The results indicate that DNA polymerase I appears to play a key role in the repair of damage produced on the DNA by ozone while thelexA gene product seems to play a minor one.This research was sponsored by the National Sciences and Engineering Council of Canada. One of us (PLH) acknowledges a scholarship from the NSERCof Canada.     

HEp-2细胞MPM-2磷蛋白的蛋白质组学分析

MPM-2磷蛋白家族成员在有丝分裂进程中起着重要作用．为了从MPM-2磷蛋白家族层面入手研究细胞周期调控中磷蛋白的重要作用，以人上皮样喉癌细胞株HEp-2为细胞模型，运用双向电泳、免疫印迹以及质谱技术等蛋白质组学的方法对其细胞抽提物中的部分MPM-2磷蛋白进行了分析鉴定，初步确定了乙二醛酶(GlyoxalaseⅠ)、真核翻译起始因子(eIF4B)以及核质蛋白NPM等MPM-2特异识别的细胞磷蛋白，这将有助于进一步研究MPM2磷蛋白家族成员在细胞周期调控中的重要作用．     

工程测量中的坐标变换

针对城市工程测量中经常遇到不同坐标系之间的成果转换问题 ,提出了一种非常简单实用的方法 ,该方法的基本原理是将一个坐标系中的坐标成果换算成实际的距离与方位 ,然后利用这实际的距离与方位计算在另一坐标系中的成果。论文最后给出了一实例说明这种转换的可靠性