桅杆结构中纤绳的参数振动

以桅杆结构中的纤绳为研究对象，建立了在一端运动下纤绳的非线性振动理论模型，并用数值方法分析了其参数振动特性。研究表明，纤绳倾角，预拉应力、阻尼比和激励振幅对纤绳的参数振动产生着重要影响。     

白血病相关抑制物对正常人T淋巴细胞集落形成的影响

通过收集16例急性非淋巴细胞白血病(ANLL)病人的血清和外周血白血病细胞条件培养液(LCM),对血清和LCM中的白血病相关抑制物(LAI)对正常人T淋巴细胞集落(CFU-TL)形成的影响进行研究。发现16例病人的LAI对正常人CFU-TL均有抑制作用,而缓解期病人的LAI抑制作用甚弱。追踪观察11例病人:其中抑制率高于30％的6例患者治疗效果差;抑制率低于25％的5例患者治疗效果较好,达到完全缓解或部分缓解。结果提示ANLL病人的细胞免疫功能缺陷与LAI的存在有关。     

不同融合条件及激活方法对体细胞克隆绵羊胚胎发育的影响

对成年绵羊耳部皮肤细胞进行培养传代，将培养出的成纤维细胞经血清饥饿法处理后，作为核供体移植到MII期去核卵母细胞中进行核移植胚胎的生产，用细胞驰素B法与离子霉素＋6－DMAP法对核移植胚胎（重构胚）在电融合后进行化学激活，然后在38.6度，5％CO2，最大相对湿度条件下，进行体外培养（IVC），重构胚卵裂率分别为37．8％与43．8％（51／135与81／185），囊／桑葚胚率分别为9．8％和12．3％（5／51和10／81），在融合电压1．5kV/cm，持续时间30us，脉冲次数为2次的条件下，孤雌激活胚胎的卵裂率和囊／桑葚胚率分别为81．0％和12．9％。     

Ultrastructural localisation of substance P and choline acetyltransferase in endothelial cells of rat coronary artery and release of substance P and acetylcholine during hypoxia

Substance P and choline acetyltransferase have been localised in a small proportion of endothelial cells of rat coronary arteries using electron microscopic immunocytochemistry. During a hypoxic period of 1 min, coronary vasodilatation was produced in the Langendorff heart preparation and increased levels of substance P and acetylcholine were released into the perfusate. The possibility that these substances are released from endothelial cells during hypoxia and contribute to the hyperaemic response is discussed.     

方酸菁染料的光伏效应及HMO计算

本文测试了六个方酸菁染料太阳电池的光伏效应,发现其最大量子效率随染料端基杂环碱性的降低而增大。通过这些染料的溶液吸收曲线与光电流光谱响应曲线的比较,可以认为真空升华固态薄膜中染料分子的聚集状态有利于导电性。此外,应用HMO理论计算的染料分子跃迁能与其最大光电流对应的波数之间有较好的线性关系。     

太湖猪淋巴细胞和小鼠骨髓瘤细胞杂交细胞的建立

以我国优良猪种小梅山（属太湖猪种）的脾淋巴细胞和小鼠骨髓瘤细胞（ＳＰ２／０）作亲本，经聚乙二醇（ＰＥＧ）促融，ＨＡＴ培养基选择培养，先后得到２５株杂种细胞，并对杂种细胞进行染色体分析和同工酶电泳等研究。结果显示，杂种细胞系含有全部小鼠骨髓瘤细胞染色体，而猪染色体丢失迅速，仅保留猪的４号、５号、７￣１０号、１２号、１３号、１５号和１７号等部分染色体，杂种细胞内能检测到全部小鼠同工酶活性，但仅能检测到     

Effects of butyrate and insulin and their interaction on the DNA synthesis of rumen epithelial cells in culture

Summary Rumen epithelial cells (REC) were incubated in the presence of various concentrations of butyrate or insulin or with both of them, to obtain information on their effect on the DNA synthesis of cultured cells. The 24-h values of³H-thymidine incorporation into cellular DNA were measured in the presence of butyrate, insulin or butyrate plus insulin. While butyrate reduced DNA synthesis, insulin produced an increase over the control. Combined butyrate plus insulin treatment influenced the incorporation of label in accordance with the relative proportion of these two substances.     

Communicating junctions between pillar cells in the gills of the atlantic hagfish,Myxine glutinosa

Summary In the respiratory lamellae of the gills of the atlantic hagfish,Myxine glutinosa, pillar cells are coupled by communicating junctions. It is suggested that these cells behave like a functional syncytium.Supported by the DFG, SFB 146. The authors are indebted to Drs F. Walvig and H. Stolte for kindly providing the hagfish. The expert technical assistance of G. Voss-Wermbter, Dipl.-Ing., and H. Heidrich is gratefully acknowledged.     

常用光源对太阳电池性能的影响

讨论了太阳、荧光灯、白炽灯的光谱对太阳电池的影响，分析了同亮度下，太阳电池在荧光灯下不能工作，而在白炽灯下能正常工作的原因．     

酚醛树脂碳化产物作为锂离子电池碳电极材料(Ⅱ)──锂离子电池充放电性能测试

测试分析了酚醛树脂碳化产物组装的锂离子充放电性能．实验结果表明，树脂碳化 产物作为锂离子电池碳电极材料时，其碳化处理温度有一个最佳温度范围，酚醛树脂碳化产物 的最佳温度在７００℃左右；树脂碳化产物的比表面积是影响电池充放电性能的重要因素，碳化 产物的比表面积越大，电池的充放电量就越高，电池充放电量与充放电电流密度成反比．