查询词典 spermatogonial

These data suggested that the centrin isoforms played different roles in different stages of spermatogenesis. The centrin-1 gene was revealed to be relevant to the centriolar translocation to the posterior pole of cell and the elaboration of flagellum during spermiogenesis, while the centrin-2 and centrin-3 might play roles in spermatogonial mitosis but were not involved in the spermatid differentiation process.

这些结果提示，Centrin同源基因在精子发生的不同阶段发挥不同功能，其中Centrin-1与精子细胞分化期的中心体后移、鞭毛的生成及精子中轴形成可能密切相关，Centrin-2和-3则可能在精原细胞有丝分裂中起作用，而与精子细胞变态分化无关。

BACKGROUND :Rapid development of spermatogonial stem cells is the new hope for assisting reproductive technologies, and the stability of the number and structure of the chromosome cultured in vitro is one of the important factors in usage.

背景：精原干细胞技术的快速发展为生殖工程带来了新希望，而在体外维持染色体数目及结构的稳定性是其使用的关键问题之一。

Using semi-quantitative RT-PCR, the differential expression profiles of eleven selected genes were confirmed in the ovaries of triploid and diploid. These genes fell in gene categories with a wide range of functions. The results indicated that triploidy affects the dynamic gene regulatory network in triploid ovary. This study established a firm basis for future investigation on characterization of crucial molecular events for normal ovarian development in shrimp.To further dissect exact gene functions for gonad development of shrimp, three differentially expressed genes between diploid and triploid ovary, PCNA (proliferating cell nuclear antigen), CAS/CSE1 (cellular apoptosis susceptibility protein/chromosome segregation 1) and SSRF (spermatogonial stem-cell renewal factor) were characterized on certain aspects.

利用抑制性消减杂交技术，建立了对虾二倍体和三倍体卵巢间的2个消减文库；在正向消减文库(以三倍体卵巢作为实验组，二倍体卵巢作为驱动组)中，鉴定到54个基因；在反向消减文库(以二倍体卵巢为实验组，三倍体卵巢为驱动组)中，鉴定到16个基因；选取11个差异表达的基因，利用半定量RT-PCR的方法对其在二倍体和三倍体卵巢间的表达进行了检测，均能很好地与消减结果相吻合；这些差异基因编码多种功能的蛋白，分析表明染色体的三倍化使三倍体卵巢中的基因调控网络受到了影响；为深入揭示维持卵巢正常发育的关键分子调控事件奠定了基础。

Objective: To compare the effect of isolation methods and culture systems on spermatogonial stem cells from chicken.

目的：比较不同分离方法和培养体系对鸡精原干细胞生长的影响。

OBJECTIVE: To investigate the effect of Vitamin A on growth and proliferation of mouse spermatogonial stem cells in vitro culture.

目的：探讨维生素A对体外培养小鼠精原干细胞生长增殖的影响。

Objective: To search for an effective method for enriching spermatogonial stem cells in mice.

目的：寻求富集小鼠精原干细胞的有效方法。

Objective: To perform a preliminary study on the dysfunction of spermatogonial stem cells induced by cyclophosphamide.

目的：初步探讨环磷酰胺对精原干细胞分化功能的干扰作用。

Objective To explore the conditions and methods for cryopreservation and proliferation of mouse spermatogonial stem cells.

目的探索小鼠精原干细胞冷冻保存方法以及解冻后体外快速增殖的条件。

MAIN OUTCOME MEASURES : Culture of bone marrow stromal cells and spermatogonial stem cells and coloration and count of chromosomes.

主要观察指标：骨髓基质及精原干细胞的培养及染色体显色与计数。

Results The feeder layers of bone marrow stromal cells allowed spermatogonial stem cells to proliferate well and remain undifferentiated.

结果 原代的小鼠培养骨髓基质细胞能很好的维持精原干细胞的非分化性扩增。

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。