查询词典 spermatozoon

Either of two conjugating gametes that differ in structure or behavior,such as the small, motile male spermatozoon and the larger,non motile female ovum.

异形配子在结构或行为上不同的两个配合配子之一，如小的能动的雄性精子与大的不能动的雌性卵子

Mature spermatozoon canbe chssified into primitive type , composed of three regions : head , middle piece and tail .

成熟精子为原生型，由头部，中段和尾部组成。

Spermatogenesis and spermatozoon ultrastructure in the Nile shield-head catfish Synodontis schall are described using scanning and transmission electron microscopy.

用扫描和透射电子显微镜研究了尼罗河鲶--盾头歧须的精子发生和精子的超微结构。

Therefore, three methods were usually applied to cryogenic preservation of the fine and rare species of fish :1 perserving fish spermatozoon in cryogenic condition.

目前实现鱼类优良品种和珍稀物种的种质保存主要有以下三种途径：一是对鱼类精子超低温冷冻保存。

One was adjacent to the equatorial segment and the other adjacent to the spermatozoon tail.

依据膜蛋白成分的差异，牛精子头后部质膜可以划分为紧邻赤道板的sp18质膜区域(sp18-rich region)和紧邻尾段的无sp18质膜区域(sp18-free region)。

The tail of the spermatozoon was thin and long and with an undulating membrane, consisted of central filament and acces...

精子尾部细长，主要由轴丝和附属纤维组成，轴丝的外面具有波动膜。

Result The results showed that vitamin A addtion in ration significantly improved the quality of semen, the density of spermatozoon, and reduced the teratospermia rate.

结果］结果表明：适当添加一定量维生素A，有助于提高种公猪的采精量、精子密度，降低精子畸形率。

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

Active mechanism of RVLEAE may be that glycosides interfere the maturation of spermatozoon in the epididymis cauda.

RVLEAE有抗生育作用，作用部位主要在附睾，作用机制可能是糖苷类化合物干扰了精子在附睾的成熟。

Prostate regards male reproduction system as the biggest accessary sexual gland, fluid forms its excretive prostate seminal 1/10 ～ 1/3, have protection, enhance spermatozoon activity to reach lubricant and urethral wait for action.

前列腺作为男性生殖系统最大的附属性腺，其分泌的前列腺液构成精液的1/10～1/3，有保护、增强精子活动及润滑尿道等作用。

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。