13C-methacetin breath test parameter S for liver diseases diagnosis

The mechanism of ¹³C-methacetin breath test is set forth clearly with the analysis of pharmacokinetics mode, and the measuring method of ¹³C-methacetin breath test and its clinical applications in the diagnosis of liver diseases are reported in detail. On the basis of comprehensive analysis of the clinical test data, the advanced diagnostic parameter S is of important significance for the application and development of breath test.     

~(13)C-methacetin breath test parameter S for liver diseases diagnosis

The mechanism of 13C-methacetin breath test is set forth clearly with the analysis of pharmacokinetics mode, and the measuring method of 13C-methacetin breath test and its clinical applications in the diagnosis of liver diseases are reported in detail. On the basis of comprehensive analysis of the clinical test data, the advanced diagnostic parameter S is of important significance for the application and development of breath test.     

单爪螯蜂属二新种：膜翅目：螯蜂科;单爪螯蜂亚科

本文记述单爪螯蜂属二新种;梳垫单瓜螯蜂Ａｎｔｅｏｎ ｐｅｃｔｉｎａｒｏｌｉｕｍ,ｓｐ．ｎｏｖ。和滑盾单爪螯蜂Ａｎｔｅｏｎ ｂｌａｎｄｕｓｃｕｔｕｍ,ｓｐ．ｎｏｖ。新种的模式标本保存在浙江农业大学植物保护系。     

鸡胚完整脑的光子发射和光激发光研究

利用自制的单光子记录系统,对离体的浸于DMEM培养液中的鸡胚的完整脑所进行的光子发射测量显示出整脑与培养液相比有光子发射.完整脑的光子发射强度与胚龄,鸡胚的健康状况和离体后脑组织的新鲜程度有关.在对完整脑的光激发光测量中观察到一种短寿命的延迟发光,它的衰减过程不服从指数衰减规律而表现出双曲线衰减行为.从生物光子发射归因于生物体内的非定位的相干性电磁场及Frohlish的生命系统中存在着长距离的相干性的理论,讨论了利用生物光子发射研究细胞间通讯、生物的调节及生物与环境关系的意义,以及所检测的光子发射与生物系统自身的相干性电磁场的关系,并提出应从环境对生物系统自身场的影响来理解所测的生物光子发射.     

关于徐州白云洞与南京汤山第1地点的哺乳动物化石

白云洞位于江苏省徐州市九里区九里山的白云寺内,产有中国鬣狗,三门马,李氏野猪,葛氏斑鹿,肿骨鹿等9个种类,其地质时代大体上与汤山第一地点或北京人动物群同时,为中更新世晚期。     

Sequence analysis of lacZ- mutations induced by ion beam irradiation in double-stranded M13mp18DNA

While M13mp18 double-stranded DNA was irradiated with ion beam, and transfected intoE. coli JM103, a decrease of transfecting activity was discovered. The lacZ^- mutation frequency at 20% survival could reach (3.6–16.8) × 10⁴, about 2, 3–10 times that of unirradiated M13DNA. Altogether, 27 IacZ^-mutants were selected, 10 of which were used for sequencing. 7 of the sequenced mutants show base changes in 250-bp region examined (the remaining 3 mutants probably have base changes outside the regions sequenced). 5 of the base-changed mutants contain more than one mutational base sites (some of them even have 5–6 mutational base sites in 250-bp region examined); this dense distribution of base changes in polysites has seldom been seen in X-rays, Y-rays or UV induced DNA mutations. Our experiments also showed that the types of base changes include transitions(50%), transversions (45%) and deletion (5%); no addition or duplication was observed. The transitions were mainly C→T and A→G; the transversions were mainly C→A and C→G. The mutations involving cytosine residue (in the template strand) constitute about 60% of all the base changes observed. In comparison with the surrounding sequences of mutational base sites, the base located between TG and CT is found to be easily substituted.     

帕里红景天的化学成分研究

从帕里红景天根茎的石油醚和乙醇提取部分共分得１４种结晶性化合物,经光谱分析和化学反应,分别鉴定为二十二醇、二十六酸、十九醇、β－谷甾醇、二十九醇、红景天甙、麦芽糖、棉皮素－８－葡萄糖甙、胡萝卜甙、酪醇、咖啡酸、没食子酸、形花内酯和新化合物帕里甙。     

寄生于直翅目昆虫的索线虫属一新种—西安索线虫（线虫纲：索科）

本文报道陕西省西安附近的咸阳市近郊农作区的直翅目昆虫日本菱蝗、姬蟋等体内寄生的索线虫属一新种,命名为西安索线虫Ｍｅｒｍｉｓ ｘｉａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．;指出了它的鉴别特征。索线虫属及直翅目宿主皆为国内新记录。     

小鼠内细胞团标志蛋白的性质、分离和纯化

我们用二相电泳方法在小鼠畸胎瘤系统中发现小鼠胚胎内细胞团标志蛋白双联体(分子量39,000,p14.4—4.5)也存在于未分化的胚胎癌细胞株(PSAI-NG2、F9、PCC3)中,但在已分化细胞株滋养层母细胞癌TDM1中用二相电泳方法不能检查到这蛋白。把EC细胞分为细胞质、细胞核、染色体三部分再进行检查,可以清楚地看到这蛋白主要存在于染色体部分。把染色体再分成0.35M NaCl可溶性,2M NaCl可溶性及2M NaCl不溶性三个组份时,则这蛋白出现在0.35M NaCl可溶性组分中,表明它是与染色体疏松结合的非组蛋白染色体蛋白。这蛋白是一种耐热性蛋白,在80℃受热10分钟不能使它变性。用制备型SDS聚丙烯酰胺凝胶电泳对经热处理的0.36M NaCl可溶性染色体蛋白进行分离,可得到电泳纯的小鼠内细胞团标志蛋白。由于这蛋白约占细胞总蛋白0.6%,与染色体疏松结合,又与早期胚胎细胞的多能性相关,提示它在维持多能细胞染色体构象方面有重要作用。