染色质的

The occurence of cytomixis or intercellular migrating chromatin substance exists widely in the pollen mother cell...

花粉母细胞间染色质穿壁转移现象在高等植物中广泛存在，但就其产生的原因素有争议。

Results:Typical apoptotic cellular changes were found after As2O3 treatment,transmission electron microscopy showed nucleole disappeared,chromatin condensated under nucleonic membrane.

结果：经As2O3作用后VSMCs出现典型的凋亡变化，透射电镜下可见细胞核仁消失，染色质浓缩聚集于核膜下。

That is, the nucleolus becomes smaller and smaller, the cohesion of the cytoplasm becomes stronger and stronger.

即：生精细胞的细胞核逐渐变小，染色质不断集缩。

Recent findings that provide mechanistic insight into complex relationship between chromatin modification and gene transcriptional regulation during oogenesis will be discussed.

对卵子发育过程中染色质结构和基因转录调控的表现遗传学变化综述。

Results Activities of SCs in the oxidative injured group decreased compared with the control group. However, these changes were significantly reversed by the IGF-1 pre-conditioning.

结果 与正常组及保护组相比，H2O2处理组细胞具有典型的凋亡形态特征：核染色质浓染、边集，细胞体积缩小，细胞存活率降低；SOD含量明显减少（P＜0.01，MDA含量明显增加（P＜0.01，Bcl-2表达下调；而IGF-1保护组细胞存活率明显升高（P＜0.01，SOD含量较损伤组增高（P＜0.01，MDA含量较损伤组明显减少（P＜0.01，Bcl-2表达明显上调。

BMI-1(B-cell-specific Moloney murine leukemia virus integration site 1), a Polycomb group repressor, is always present as a PcG complex combined with RING1, HPC2, Mph2, et al. BMI-1 prolongs cells'capacity to proliferate and represses their senescence by repressing the transcription of CDKN2A through acetylhydrolasing or deacetylhydrolasing the Polycomb response elements in chromosome.

BMI-1 (B-cell-specific Moloney murine leukemia virus integration site 1)属于PcG家族，它与该家族其他成员如RING1，HPC2，Mph2等结合形成蛋白复合体，作用于染色质PREs位点，通过对组蛋白进行乙酰化和去乙酰化修饰，从而稳定抑制CDKN2A转录，最终促进细胞的增殖并抑制细胞凋亡。

Methods Molecular epidemiological investigation of 249 men from different groups(training and non-training)was carried out by using flow cytometer to detect the integrity and damage of in situ DNA of sperm nucleus, and sperm chromatin structure assay was performed.

应用流式细胞仪快速测量精子核原位DNA损伤和完整性，分析精子染色质结构，对两组不同作业环境(过度训练组与非训练组)的 2 4 9名男性官兵进行分子流行病学调查。

According to the changes of the structure of chromatin and the morphology of cell, the process of the typical spermatogenesis of Cipangopaludina chinensis can be divided into five stages: spermatogonium, primary spermatocyte, secondary spermatocyte, spermatid and mature sperm.

中国圆田螺典型精子发生时，根据染色质和细胞形态的变化，可将其发生分为以下五个时期：精原细胞、初级精母细胞、次级精母细胞、精细胞和成熟精子。

In primary spermatocyte and secondary spermatocyte the chromatin densified to some blocks.

初级精母细胞略小，染色质开始凝集成小团块，线粒体向细胞的一侧集中。

Long stretches of the continuous DNA molecule wind around these clusters of proteins, or histones, forming beadlike complexes known

这些螺旋和超螺旋形成致密的染色体组结构。每个长链DNA与组蛋白和非组蛋白一起构成染色质物质。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐