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多精入卵现象
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  “多精入卵现象”译为未确定词的双语例句
     There was no polyspermy in experimental group.
     实验组中未发现有多精入卵现象
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     Now and then, there exists the phenomenon that a few sperms penetrate into egg, while polyspermy is few.
     有多精入卵现象,极少数卵子多精受精。
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  相似匹配句对
     Phenomenon
     现象
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     Now and then, there exists the phenomenon that a few sperms penetrate into egg, while polyspermy is few.
     有多精入卵现象,极少数卵子多精受精。
短句来源
     There was no polyspermy in experimental group.
     实验组中未发现有多精入卵现象
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     R on T Phenomenon of The Older
     老年性R on T现象
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Bovine follicular oocytes collected from butchery were ma-tured and fertilized with in vitro capacitated spermatozoa. After cultivationfor 21, 22, 24, 26, 28 h, the oocytes which reached metaphase Ⅱ were38.89%,74.16%, 77.78%, 86.67% and 85.71% respectively. After 25 h further incubation it did not significantly increase the maturation percentage.Themorphology of oocytes greatly affected their ability to mature in vitro, the oocytes of A, B and C grades were cultured for 24 h, 94.68%, 55.43% and31.25% of oocytes...

Bovine follicular oocytes collected from butchery were ma-tured and fertilized with in vitro capacitated spermatozoa. After cultivationfor 21, 22, 24, 26, 28 h, the oocytes which reached metaphase Ⅱ were38.89%,74.16%, 77.78%, 86.67% and 85.71% respectively. After 25 h further incubation it did not significantly increase the maturation percentage.Themorphology of oocytes greatly affected their ability to mature in vitro, the oocytes of A, B and C grades were cultured for 24 h, 94.68%, 55.43% and31.25% of oocytes reached metaphase Ⅱ respectively. When oocytes of cul-ture delayed for 8h in vitro, the proportion of mature oocytes was muchless than that for 0.75 h or 4h. The time of first sperm penetrating intoooplasm was at 6h after insemination. The sperm head enlarged after 2-3hand developed into early pronucleus stage after another 6h. The time ofthe first cleavage was at 30h after insemination.

本试验主要研究了牛卵泡卵体外成熟、体外受精及其受精过程的发生。从屠宰场收集800枚牛卵泡卵进行体外成熟培养,并用体外获能的精子体外受精。在用m-TCM199培养21、22、24、26、28h后,达到中期Ⅱ的卵母细胞比例分别为33.89%、74.16%、77.78%、86.67%、85.71%;25h后,如果继续培养,成熟的卵母细胞比例不再显著增加。卵母细胞的自身形态显著地影响其成熟效果,A、B、C级卵培养24h后分别有94.60%、55.43%、31.25%的卵母细胞达到中期Ⅱ。卵泡卵在体外滞留8h后,其成熟率(47.11%)明显地低于45min(77.92%)或4h(74.60%)。肝素和钙离子载体A 23187都能诱发牛精子获能,二者在受精效报上差异不显著(P>0.05),并且都有多精入卵现象发生。授精后6h精子进入卵内,精子入卵后2~3h头部膨大,6h后出现早期原核,最早发生卵裂是在授精后30h。

The events of meiosis and fertilization in Ostrea rivularis were observed withacteo-orcein stain method. The early development of eggs up to 2-cells stage was divilded into19 stages mainly according to the chromosome behavior of both male (sperm, male pro nuclear)and female (meiosis and female pronuclear). Eggs were fertilized and developed at28. 8℃. Before sperm penetration,all eggs were at prophase of first meiosis (Germinal vesiclestage). After sperm penetration, germinal vesicle underwent breakdown and two...

The events of meiosis and fertilization in Ostrea rivularis were observed withacteo-orcein stain method. The early development of eggs up to 2-cells stage was divilded into19 stages mainly according to the chromosome behavior of both male (sperm, male pro nuclear)and female (meiosis and female pronuclear). Eggs were fertilized and developed at28. 8℃. Before sperm penetration,all eggs were at prophase of first meiosis (Germinal vesiclestage). After sperm penetration, germinal vesicle underwent breakdown and two meiotic division followed. first and second polar body were extruted mainly at 33 min and 45 min postinsemination. Male pronuclear was formed before female promuclear,the chromatin of maleand female pronuclear condensed separately and associated at the metaphase plate of firstcleavage. One hour after insemination, most eggs reached the 2-cell stage. Polyspermy wasobserved at 25℃ and 26℃, it may led to the formation of abmormal embryos and polyploid. Asynchronous development of eggs was apparent.

用醋酸──地衣红染色的方法对近江牡蛎人工授精的卵子减数分裂和受精过程进行了详细的细胞学观察.精子入卵前,卵子处于第一次减数分裂的前期(胚泡期),精子入卵后,胚泡消失,然后进行两次减数分裂,在海水温度为28.8℃的情况下,授精后33min和45min,绝大部分受精卵已排出第一极体和第二极体,雄原核可在第一极体排出后及第二极体排出前任何时期内形成,雌雄原核以联合的方式将两组染色体合并,授精后1h,大部分卵子完成第一次卵裂.在25℃和26℃授精的情况下,观察到了较多的多精入卵的现象.卵子发育的非同步性现象非常明显.

This thesis studied the process of fertilization of the abalone ( Haliotis discus hannai ) with transmission electron microscope (TEM) The jelly coat of abalone egg activated spermatozoa and induced acrosome reaction The vitelline membrane promoted the acrosome reaction reach the climax After the sperm entered the egg, the egg cortical reaction took place and the fertilization membrane was formed Afterwards, the egg's meiosis began Besides,we found polyspermy of the abalone

本文用透射电镜观察了皱纹盘鲍(HaliotisdiscushannaiIno)的受精过程。鲍卵子的胶膜使精子活化,并诱发了顶体反应,卵黄膜使顶体反应达到高潮。精子入卵后,卵发生皮层反应并形成受精膜开始减数分裂。此外,还观察到鲍的多精入卵现象

 
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