精子形成

本实验结果表明，核蛋白由组蛋白转换成鱼精蛋白的过程，发生在精子形成时期，此过程可分成连续的两个阶段，即过渡蛋白先取代组蛋白，再由鱼精蛋白取代过渡蛋白。

These observations suggest that the nucleoprotein transition from histones to protamine ( S_1 ) occur during spermiogenesis and that this process could be divided into two consecutive steps , i. e. from histones through an intermediate phase of transition proteins to protamine .

日本鳗鲡精子形成过程中的形态结构特点

Modality and structure of Japanese eel ( anguilla japonica ) during spermiogenesis

DNA甲基化在新生SD大鼠暴露化学物致精子形成障碍中的作用

DNA Methylation in the Disturbance of Spermatogenesis Caused by Exposure to Chemical in Neonatal SD Rats

F1雄性个体的生殖腺出现三种不同的状况，一是完全能育型，只占总数的4.67%，可以完成由精原细胞到精子形成的全部发育过程；

2 ) . The gonad of F_1 male individuals appeared in three states : the first is completely fertile ( 4.67 % of the total ), and the entire course of development ( from spermatogonia to spermatozoa ) can be completed endogenously under pond enviroment .

小鼠精子形成各阶段转基因效率的研究

Study of The Transgenic Efficiency in Different Spermiogenesis Stages in Mice

动物精子形成过程中，精子细胞形成精子，形态结构发生了显著变化。

During spermiogenesis in animals , spermatids change into spermatozoa .

Y染色体上存在精子形成所必需的基因。

And there are essential genes for sperm formation on the Y chromosome .

推测，小分子热激动蛋白与精子形成有密切关系。

We suggest that small heat shock proteins are closely related to spermatogenesis .

人类和老鼠在精子形成和血液睾丸屏障方面有相似的地方。

There is reasonable similarity of mice and humans spermatogenesis and the blood-testes barrier .

这些结果为进一步认识家蚕精子形成过程提供了重要的生物学信息。

These results may provide valuable biological information for investigating spermiogenesis in the silkworm .

10.营养核在精子形成后极度退化。

10.It is after the formation of sperm cells that the vegetative nucleus degenerates seriously .

在精子形成期，支持细胞具有典型的类固醇激素分泌特征；

In the spermatogenesis , Sertoli cell showed the typical ultrastructure features of steroid hormone secreting cell .

精子形成过程，受到多种调控机制的影响：激素调控、营养调控、生态因子调控、基因调控等。

Spermatogenesis is affected by various regulatory mechanisms , such as hormone , ecological factors , gene regulation .

克氏原螯虾精子形成的晚期也可以观察到一个碱性蛋白致密的顶体囊。

An acrosomal vesicle with compact basic proteins also was observed in the late stage of spermatid of Pro .

结果显示细粒棘球绦虫的精子形成主要是由于精细胞内微管结构的多次排列组合形成的。

The results showed that the sperm of Echinococcus granulosus was composed of microtubes which were arranged and combined many times in spermatid mainly .

结论北草蜥精子形成过程中细胞核及细胞器的超微结构变化在有鳞类蜥蜴分类上具有重要意义。

Conclusion It has great significance of nucleus and cell organelle as taxonomic character of Squamate lizard in the ultrastructure of spermiogenesis of Takydromus septentrionalis .

而近年来发展的免疫荧光技术使我们可以直视减数分裂重组事件，为研究人类精子形成的过程提供了新的手段。

However , recently developed immunofluorescence methods , which enable us to directly view meiotic recombination events during gametogenesis , have revolutionized our understanding of human spermatogenesis .

结合电镜方面的研究推测：中国明对虾精子形成过程中，碱性蛋白由细胞核转移到顶体囊中。

It could be presumed that the basic proteins migrated to the acrosomal vesicle from the nucleus during sperm formation in F. chinensis , with the research by electron microscope .

在精子形成过程中，前顶体颗粒逐渐汇集、愈合成顶体泡，顶体泡覆盖在细胞核的一端逐渐发育为顶体；

At the stage of metamorphosis , proacrosomal granules gathered and cicatrized gradually and formed a bigger acrosomal vesicle , which covered at the anterior part of nucleus and formed cap-shaped acrosome .

在精子形成过程中，此抗原由胞质内均匀分布变为聚集于顶体帽旁侧的区域，这一区域将形成顶体后区。

In the process of the spermiogenesis , the antigens were assembled in the cytoplasm other than the acrosomal cap region , which was destined to form the postacrosomal region of the spermatozoon .

实验说明BPA及Complex可以扰乱下丘脑-垂体-睾丸轴，从而对睾丸中精子的形成产生威胁。

The results show that BPA and Complex can disrupt the hypothalamic-pituitary-testicular axis and threat sperm formation in the testes .

但是这并不意味着X染色体对男儿身没有影响。X染色体在精子的形成过程中起重要作用。

But that doesn 't mean its counterpart , the X chromosome , plays no part . In fact , it has a big role in making sperm .

春砂仁（AmomumvillosumLour）精子的形成和发育

The Formation and Development of Sperm in Amomum villosum Lour

赤链蛇（Dinnodonrufozonatum）精子头部形成的电镜研究

Electron microscopic study of sperm head formation in Dinodon rufozonatum

克氏综合征的自身免疫研究&血清抗精子抗体形成的机理探讨

Studies on autoimmunization of klinefelter syndrome & discuss the machenism of developing for anti-sperm antibody

17α－甲基睾丸酮可促进中华绒螯蟹幼蟹精巢发育，即精巢指数增大、加快精子的形成；

17 α methyltestosterone can make testis index increasing , accelerate testis development and sperm formation .

精子的形成过程包括细胞核的拉长、染色质的浓缩、顶体和鞭毛的形成、细胞质的排除。

The process includes nuclear elongation , chromatin condensation , acrosomal and flagellar development , and elimination of excess cytoplasm .

大量流行病学调查和动物实验表明，铅具有较强的雄性生殖毒性，可影响精子的形成和发育，降低精子质量，但其毒作用机制并不清楚。

Epidemiologic surveys and male animal experiments showed that lead had strong male reproductive toxicity , it effected spermatogenesis and development and decreased sperm quality .

超过一半的人类受精卵卵子和精子结合形成的单个细胞出现了在猴子受精卵中没有观察到的异常。

More than half of the human zygotes single cells formed by the merging of an egg and sperm had abnormalities not observed in the fertilized eggs of the monkeys .

超过一半的人类受精卵——卵子和精子结合形成的单个细胞——出现了在猴子受精卵中没有观察到的异常。

More than half of the human zygotes - single cells formed by the merging of an egg and sperm - had abnormalities not observed in the fertilized eggs of the monkeys .