精子的

The spermatophorins are transferred into the female sperm receptive organs and take part in the forming process of the spermatophore. During mating, the functional proteins transferred with the sperm can decrease female receptivity, increase egg production, and promote sperm storage and competition.

精包结构蛋白参与精包的形成；功能蛋白在交配过程中随精子一起转移到雌虫体内，导致雌虫行为和生理的深刻变化，如降低雌虫再交配率、提高产卵量、促进精子转移、储存和竞争等。

A caplike structure at the anterior end of a spermatozoon that produces enzymes aiding in egg penetration .

精子头粒蛋白一种在精子内前端的帽状结构，可产生帮助穿透卵子的

Objective To investigate the localization and the morphological changes of manchette during mouse spermiogenesis.

目的 通过观察manchette结构在小鼠精子细胞中的定位和形态变化，探讨其在小鼠精子细胞变态成形过程中的作用和意义。

Mammalian Spermatogenesis is a unique cell differentiation process and can bedivided into three stages: mitosis, meiosis, and spermiogenesis.

哺乳动物的精子发生是一个复杂的细胞分化过程，可分为有丝分裂期、减数分裂期和精子形成期三个阶段。

The immunostianing of ghrelin was not observed in Leydig cells after the impairment. Conclusion The changes in the expression of ghrelin suggest that ghrelin may play an important role in the function regulation of testis and the process of spermatogenesis and spermiogenesis.

结论Ghrelin在小鼠正常及辐射损伤睾丸中的特异性表达和变化，提示其可能与睾丸精子发生、精子形成及辐射损伤修复有关，具有重要的睾丸生物学调节功能。

We think that centrin play an important role in meiosis during Urechis unicinctus sperm metamorphosis difference and we also think that centrin may be related to trochophore cilia and sperm tail formation,and reconstraction of centrosome after fertilization.

我们推测Centrin在单环刺螠精子发生过程中减数分裂或精子细胞变态分化过程中发挥作用；在单环刺螠早期胚胎发育中，Centrin可能与受精后中心体的重建及担轮幼虫的纤毛形成有关。

Fertilization of the egg by a single sperm occurs in the ampullary portion of the fallopian tube about a day after ovulation.

数百万的精子则向上运行，在输卵管的壶腹部，精子和卵子结合，称为受精，整个受精过程大约需要24小时。

The system was able to help androgone in testis tissue go through meiosis in vitro without addition of testos-terone by providing necessary conditions for differentiation of androgone.Key words: testis;tissue culture;in vitro spermatogenesis;transmission electron microscopy;HE staining

证实，在没有添加睾酮的情况下，此培养体系能够提供睾丸组织块生精细胞分化所需要的条件，使非精子细胞类生精细胞减数分裂为精子细胞。

Presence of a genetic factor like azoospermia factor microdeletions may lead to irreversible spermatogenic arrest in these cases.

遗传因子如无精子因子微缺失的存在可能在这些病例中导致不可逆的精子发生阻滞。

The rate of Flow cytometry to analyse retinoic acid haploid is 19.3%.The sperm-like cells achieved could activate bovine oocytes by sperm injection, and the development rate of blastosphere was 20.36%. Conclusions SSCs of newly -born mice can be induced and differentiated into sperm-like cells and are also capable of activating oocytes.

本实验通过体外诱导新生小鼠SSCs分化为精子样细胞，探讨不同诱导方法的诱导效率；采用显微注射法将精子样细胞注射到卵母细胞和去核卵母细胞，探讨其体外重构胚的发育能力，为SSCs体外分化研究打下基础。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。