樟脊网蝽生物学特性观察

樟脊网蝽是香樟的重要害虫,在上海1年发生4代。4月下旬越冬卵始孵,9月下旬开始出现越冬卵。成虫末见期在11月中旬。经室内饲养,樟脊网蝽第三代各龄若虫历期为：一龄61．45±7．8h,二龄48．00±7．6h,三龄43．43±7．6h,四龄51．00±8．0h,五龄70．50±7．5h,整个若虫期历期为281．92±14．8h。第三代野外雌雄比为1：4．07。第三代每雌产2～96粒。日最高产卵量为34粒／头,孤雌可产卵。10％灭百可2000倍稀释液和50％杀螟松2000倍稀释液喷雾防治效果可达93％以上。     

The Practitioner of Science: Everyone her Own Historian

Carl Becker's classic 1931 address ``Everyman his own historian'holds lessons for historians of science today. Like the professional historians he spoke to, we are content to displaythe Ivory-Tower Syndrome, writing scholarly treatises only forone another, disdaining both the general reader and our naturalreadership, scientists. Following his rhetoric, I argue thatscientists are well aware of their own historicity, and wouldbe interested in lively and balanced histories of science. It isironic that the very professionalism that ought to equip us towrite such histories has imposed on us a powerful taboo that rendersus unable to do so. We who count ourselves sophisticated in describing the effects ofsocial forces upon past scientists have been remarkably unconsciousof the ways our own practices are being shaped by our need (and perhapsmore importantly, the needs of our teachers' teachers) to distinguish ourselves from scientists who write history. Our fear of presentism ingeneral and Whig history in particular is really a taboo, that is, anexcessive avoidance enforced by social pressure. It succeeds at makingour work distinct from histories written by scientists, but at the awful cost of blotting out the great fact of scientific progress.Scientists may be misguided in expecting us to celebrate great men,but they are right to demand from historians an analysis of the processof testing and improvement that is central to science. If progress in general is a problematic term, we could label the process ``emendation.' This revised version was published online in July 2006 with corrections to the Cover Date.     

水团花药材鉴定方法的研究

目的:建立中药水团花的药材鉴定方法.方法:通过对主产地六批药材的研究,从薄层定性检查、水份测定、浸出物检查和灰分测定4个方面,建立了水团花的药材鉴定方法.结果:运用TLC法,定性鉴别了水团花中的2种化学成分;药材的含水量不得过9.6%;药材的水溶性浸出物不得少于31%;药材的醇溶性浸出物不得少于35%;药材的总灰分不得过5.0%.结论:该方法可用于控制水团花的质量.     

水团花药材对照品的研究

采用柱色谱分离法对水团花的根进行了单体化合物的分离,并对所分得的Quinovic acid-3β-O-β-D-glucopyranosyl-（28→1）-β-D-glucopyranosyl ester和Noreugenin进行了结构确证;结合该药材的药理活性研究,以此两种成分分析为指标,确立了药材的对照品.     

The behaviour of centrioles and the formation of the flagellum in rooster and drake spermatids

Summary Developmental changes in the formation of the centrioles and flagellum during spermiogenesis in the rooster and drake were studied.Changes in the length and thickness of the wall of the centrioles were observed from an early stage of spermatid development. Before the proximal centriole is attached to the nucleus microtubules were observed near the centrioles joined to them. At this stage of spermatid development changes on the nuclear membrane were observed at a place where the proximal centriole is attached to the nucleus. At the later stage of spermatid differentiation three to five dense extensions in the space of the nuclear invagination and dense bodies or granules near the distal centriole were present. The anterior part of the newly formed flagellum is covered by a cytoplasmic membrane displaying extension which is approximately 1.3 m long. Slight differences between the two species were observed.