精母细胞

Chromatin hetropycnote partly in spermatogonium, then become highly coacervate to form chromosome at the stage of spermatid and at last decondense at the stage of spermatozoon.

染色质在精原细胞中为部分异固缩，在精母细胞中高度凝聚为染色体，在精细胞及精子中为均匀非致密态。

Due to the deficiency of cyclin B1 and 〓, spermatogonia and pachytene/diplotene primary spermatocytes in contralateral cryptorchid testis were unable to form MPF, and therefore, they could not accomplish their nuclear division, and became arrested at the transition stage from mitosis to meiosis (G2/M phase). We also found that testosterone could regulate the cyclin B1 expression in spermatogenic cells.

由于cyclin B1和〓的缺失，粗线期/双线期初级精母细胞中的MPF无望形成，从而导致生精细胞分裂停滞在由有丝分裂向减数分裂过渡的G2/M相；（5）睾酮可在翻译水平上调控阴囊内睾丸生精细胞cyclin B1蛋白的表达。

Bax protein was expressed mainly in spermatogoni and primary spermatocytes, and sometimes the expression was also seen in spermatids and spermatozoa within some seminiferous tubules.

Bax蛋白主要表达于精原细胞和初级精母细胞，部分曲细精管中的精子细胞和精子也有表达。

On the D110, when mean total length reached about 86.5±5.9 mm, ovarian cavity grew bigger, and oocytes were firstly detected. Differentiation of testis was firstly observed in juvenile flounder with mean total length of 63.5±3.4 mm on the D90 when spermatogenous cell proliferated rapidly and spermaduct formed.

在90日龄、平均全长为63.5±3.4 mm的雄性牙鲆中，精原细胞快速增殖，并观察到了输精管结构；进一步的细胞学分化则出现在100日龄、平均全长为76.0±8.6 mm的个体中，此时可以看到精小叶的形成；在平均全长为140.0±15.2 mm时，精巢中出现初级精母细胞，标志着性腺分化的基本完成。

The spermatogenesis in worker included spermatogonia, primary speramtocyte, second spermatocyte and spermatid, but mature sperm was not found.

工蚁精子的发生过程包括精原细胞时期和精母细胞时期，并形成了精细胞，但未形成精子。

Although osmiophillic layers also developed between spermatocyte and gametophytes, they were interrupted by pores for substance and signal exchanges.

尽管精母细胞之间也有嗜锇层的形成，但嗜锇层是不连续的，其上有一些空隙，精母细胞之间可通过空隙进行物质和信息的交流。

Immunohistochemistry for HIF-1α: HIF-1αexpression was detected in germ cell cytoplasm cytoplasm, obviously spermatocyte,and was detected in nucleus of seminiferous tubule theca cell too.

免疫组化观察HIF-1α的表达情况： HIF-1α表达主要见于生精细胞的细胞质，以精母细胞明显，也见于曲细精管外周膜细胞的胞核。

Puberty when the hypothalamus pituitary development formed to stimulate the beginning of testicular gonadal hormone secretion, so that in the vas deferens spermatogonium split into spermatocytes, and then split into sperm cells, sperm cells eventually split into sperm.

青春期时，丘脑下部垂体的发育形成了，刺激睾丸性腺开始分泌性激素，使输精管里的精原细胞分裂成精母细胞，再分裂成精子细胞，最终精子细胞分裂成精子。

Results In lead poisoning group, the pathological changes in genital glands of mice were obtained; sperm count, linear movement sperm and live sperm rate decreased; the elevated motionless sperm, cacospermia and primary spermatocyte chromosome aberration rate were found. In Haierfu group, the pathological changes in genital glands of mice ameliated to different degree, sperm count, linear movement sperm and live sperm rate elevated, and motionless sperm, cacospermia and primary spermatocyte chromosome aberration rate decreased.

结果 醋酸铅染毒组雄性小鼠的生殖腺有不同程度的病理学改变，精子计数、直线运动精子数、活精子率下降，而静止不动精子数、精子畸形率和初级精母细胞染色体畸变率升高；海尔福治疗组小鼠的生殖腺病理学改变有不同程度的改善，精子计数、直线运动精子数、活精子率有所升高，而静止不动精子数、精子畸形率和初级精母细胞染色体畸变率有所降低。

Cyclin B1 protein was expressed in mitotic spermatogonia and meiotic spermatocytes and was observed predominantly in round and elongated spermatids.

Cycln B1蛋白在进入分裂期的精原细胞和精母细胞中表达；在圆形精子细胞和伸长的精子细胞中呈现大量的cyclin B1蛋白。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。