整肠生菌纯培养物的环境动力学研究

采用振荡培养研究了温度、PH值和不同培养基的环境因素对整肠生菌（地衣芽孢杆菌）消长的影响．通过对整肠生菌的动力学基础数据按计算作图的动力学研究结果表明：整肠生菌最适生长温度在35～37℃时，活菌数15─17.2×10~7／ml,是30℃和40℃时的1.26倍和1.2倍．最适PH值在5.5～7.5时,活菌数为4.15─7.55×10~8／ml,是PH值4.5和9.5时的13.l倍和13.2倍．ABC三种培养基的结果表明,培养基C最适合地衣芽孢杆菌生长，菌数最高，为69.05×10~8／ml．对数期的世代时间也最短，G=20min,比AB号培养基中培养时缩短2─6min．生长比速度（μ=0.035)最大，是AB培养基培养时的1.27倍．残废率较低,5.2％．环境因素与整肠生菌消长的这种动力学关系，为利用地衣芽孢杆菌发酵生产“整肠生”制剂的调控以及该菌剂的治疗机制方面研究提供了科学依据．     

Comparison of locomotor behaviour between white-headed langurs Trachypithecus leucocephalus and Franois' langurs T. franoisi in Fusui,China

We studied the locomotor behaviour of white-headed langurs Trachypithecus leucocephalus and Franois' langurs T.franoisi to test two hypotheses:(1) these monkeys have evolved locomotor ability to support their activities on limestone hills,and (2) Franois' langurs have evolved more diverse locomotor skills than white-headed langurs. Data were collected from 1996-1998 and in 2005 in Fusui Nature Reserve,Guangxi,and showed that the two species had similar locomotor types,but Franois' langurs had more locom...     

The Plant Cell Surface

Multicellular organization and tissue construction has evolved along essentially different lines in plants and animals. Since plants do not run away, but are anchored in the soil, their tissues are more or less firm and stiff. This strength stems     

Female waist-to-hip ratio,body mass index and sexual attractiveness in China

Men and women at Northwest University (n=751), Xi'an, China were asked to judge the attractiveness of photographs of female patients who had undergone micrograft surgery to reduce their waist-to-hip ratios (WHR). Micrograft surgery involves harvesting adipose tissue from the waist and reshaping the buttocks to produce a low WHR and an 'hourglass' female figure. This gynoid distribution of female body fat has been shown to correlate with measures of fertility and health. Significantly larger numbers of subjects, of both sexes, chose post-operative photographs, with lower WHRs, as more attractive than pre-operative photographs of the same women. Some patients had gained, and some had lost weight, post-operatively, with resultant changes in body mass index (BMI). However, these changes in BMI were not related to judgments of attractiveness. These results show that the hourglass female figure is rated as attractive in China, and that WHR, rather than BMI, plays a crucial role in such attractiveness judgments.     

麻竹花药培养及再生植株的获得

以麻竹（Dendrocalamus latiflorus Munro）花药为材料, 于M8＋2 mg·L^–1 NAA ＋0.5 mg·L^–1 6-BA＋15 mg·L^–1 PAA＋7.5 mg·L^–1 STS＋500 mg·L^–1 CH＋100 mg·L^–1 proline＋100 mg·L^–1 glutamin＋5.4% maltose＋0.8% agar的诱导培养基上成功诱导出胚性愈伤组织, 在此培养基上继代可形成体胚并分化成苗, 初步建立了麻竹花药一步成苗的再生体系。