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- Chromatin condensation was found during primary spermatocyte phase. 精原细胞体积最大，有明显核仁，出现前顶体颗粒。
- This latter cell is called the primary spermatocyte . 后者被称为 初级精母细胞 。
- Abstract Purpose : To explore cigarette end immersion-induced mutagenesis in bone marrow PCE and primary spermatocyte. 摘要 目的:探讨香烟烟蒂水浸泡液对雄性小鼠骨髓细胞和睾丸初级精母细胞的遗传毒作用。
- Objective:To estimate the number of spermatids generated by one primary spermatocyte and thus evaluate the efficiency of meiosis during spermatogenesis in normal adult men. 目的：估计正常成人精子发生的成熟分裂过程中一个初级精母细胞实际形成了多少个精子细胞，从而评价成熟分裂的效率。
- Conclusion : Cigarette end immersion increases the frequencies of micronucleus in bone marrow PCE and induces numeral aberration of chromosomes in primary spermatocyte. 结论:香烟烟蒂水浸泡液引起雄性 小鼠骨髓PCE 微核率增高,并诱发睾丸初级精母细胞染色体数目畸变。
- Methods : Micronucleus test in bone marrow PCE and chromosome aberration assay in primary spermatocyte were undertaken in mice exposed to the immersion. 方法:用香烟烟蒂生理盐水浸泡液为实验材料进行小鼠骨髓嗜多染红细胞(PCE) 微核试验和睾丸初级精母细胞染色体畸变试验。
- The results indicates that the spermatogenic process was like other teleosts, both included following stages spermatogonium, primary spermatocyte, secondary spermatocyte, spermatid and spermatozoon. 结果表明：黄颡鱼精子发生的过程与其他硬骨鱼类相似，均经历精原细胞、初级精母细胞、次级精母细胞、精子细胞和成熟精子几个时期。
- The testis at spermatocyte phase develops, and is translucent, and the spermatogenetic cells in seminiferous tubule are primarily composed of primary spermatocytes and secondary spermatocytes. 精母细胞期：精巢体积增大，半透明乳白色，主要由处于初级精母细胞和次级精母细胞阶段的生殖细胞组成；
- Keywords Mouse primary spermatocyte;Chromosome aberratio n;Methodology; 小鼠睾丸初级精母细胞;染色体畸变;方法学;
- The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa. 生精小管内有处于不同发育时期的精原细胞，初级精母细胞，次级精母细胞，精子细胞和精子；
- Keywords accumulation;micronucleus;primary spermatocyte cell;chromosome aberration.; 蓄积性;微核;初级精母细胞染色体畸变;
- Keywords Static magnetic field;Primary spermatocyte;Chromosomal aberration;Micronucleus;Bone marrow cell; 稳恒磁场强度;小鼠;初级精母细胞;染色体畸变;微核实验;
- The disease is still in its primary stage. 这疾病仍然在初发阶段。
- The little boy left primary school at eleven. 这个小男孩十一岁时小学毕业。
- Sure. We are friends since primary school. 当然，我们从小学就是朋友了。
- I started primary school when I was 5 years old. 我五岁时开始读小学。
- A primary cause of Tom's failure is his laziness. 懒惰是汤姆失败的主要原因之一。
- Primary school teachers use a lot of visual aids. 小学教师使用大量的视觉教具。
- Love and hatred are primary emotions. 爱和恨是基本的情感。
- The Democratic primary was held this month. 民主党候选人初选於本月举行。
