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middle piece 〔美國〕馬甲。

middle school

Using indirect immuno - fluorescein staining method , the localization of sp - 10 , tmdc - iii and aeg on human , mouse , rabbit , pig , bull sperm was observed under confocomicroscopy . it was found that antigens sp - 10 and aeg express on acrosome of all kinds sperms , supporting their roles in sperm - egg fusion . it was firstly described that tmdc - iii express mostly on the equator , neck and some part of tail of human sperm , on the acrosome of mouse and bull sperms , on the acrosome and neck of pig sperm , on the head , neck , and middle piece , principal piece of tail of rabbit sperm 利用間接免疫熒光法對aeg 、 sp - 10 、 tmdc -蛋白在人、小鼠、兔子、豬、牛精子上進行了精確定位, aeg 、 sp - 10在頂體部均有表達,確證了它們與精卵融合有關:首次對tmdc -蛋白在人、小鼠、兔子、豬、牛精子進行了精確定位,它主要存在于人精子尾部主段,小鼠和牛精子頂體,豬精子頂體和頸部,兔精子頭部、頸部和尾部的主段及尾段。

Following with the condensing of chromatin , nucle us gradually elongates and spires . a large number of vesicles turn into glycogen granules behind mitochondria . the mature typical sperm of cipangopaludina chinensis , having monoflagella , consists of a spiral head with only one spiral buddle conformed of nucleus , a spiral middle piece with four s 中國圓田螺成熟典型精子單鞭毛,由頭、中、尾三段構成:頭段螺旋狀,旋束由細胞核構成,僅單股;中段也呈螺旋狀,旋束由線粒體構成,共四股;尾段非螺旋狀,主要由糖原顆粒構成。

At the same time , this article chooses the network framework of its system by analyzing several basic kinds of network system structure . it utilizes network data base programming principle to discuss the visit technology of data base odbc , web data base middle pieces technology cgi , and characteristic of the calculate mode of asp c / s b / s , proposes the topological structure of network data base used in this system 同時分析了幾種基本的網絡體系結構,選擇了系統的網絡構架,利用網絡數據庫編程原理,討論了數據庫的訪問技術odbc 、 web數據庫中間件技術cgi和asp 、 c s及b s計算模式的特點,提出系統中應用的網絡數據庫拓撲結構。