查询词典 chromatid

But as a extreme poison, arsenic could induce many cytogenetical changes,such as chromosome loss, breakage and sister chromatid exchange and so on.

但砷剂同时又是一种剧毒物质，可引起染色体断裂、丢失、姊妹染色单体互换等细胞遗传学改变。

Chromosome condensation is a significant process of cell multiplication and occurs as a prelude to sister chromatid segregation that initiates at the onset of anaphase.

在细胞增殖过程中，染色质集缩是细胞分裂得以正常进行的重要条件，也是后期姊妹染色单体分离的序曲。

Cell cycle is the cell through a series of orderly changes in the cells to achieve cell growth and proliferation process of cell cycle regulation and individual development, differentiation, growth, regeneration, aging and cancer cells is closely related to eukaryotic cell cycle mitosis two key processes, namely DNA replication and sister chromatid evenly assigned to the sub-cells.

细胞周期是指细胞通过一系列有序的细胞内变化，实现细胞生长和分裂增殖的过程细胞周期的调控与个体发育、分化、生长、再生、衰老以及细胞的癌变密切相关真核细胞有丝分裂周期有两个关键的过程，即DNA的复制和姐妹染色体均衡地分配到子细胞中。

Methods: The expression of mutated P53 gene in human lymphocytes was investigated using flow cytometry.And the micronucleus and sister chromatid exchange tests were studied in vitro.

以正常人外周血淋巴细胞为材料，用流式细胞仪检测环磷酰胺对突变型P53基因表达的影响，同时以微核及姐妹染色单体互换为指标，进行致突变研究。

To accomplish this, sister chromatids must segregate together during the first meiotic division , which requires that sister chromatid cohesion persists at centromeres.

实现减数分裂，姐妹染色体必须在第一次分裂联会，这过程姐妹染色体在着丝粒结合。

False sister chromatid separation and chrosomal instability may be caused by abnormal centrosome, which may make bipolar spindle abnormal.

异常中心体可产生纺锤体异常，使染色体错误分离，引起染色体不稳定性和非整倍体的形成。

The analysis of sister chromatid exchange frequencies is a useful tool for the study of damages in genetic material of human beings induced by enviromental mutagens and carcinogens.

用荧光加Giemsa术区分姐妹染色单体，分析了13名中年男子外周血淋巴细胞的SCE，比较吸烟者和不吸烟者"自发"的和用丝裂霉素诱发的SCE频率变化。发现吸烟者的SCE频率(8.33±1.08)显著地高于不吸烟者(4.41±0.72)，p.001。

Ferrous ion and magnesium ion are both necessary to the action of bleomycin on lymcytes SCE.Key words: bleomycin;sister chromatid exchanges

一定量的Fe2+和Mg2+的存在对于BLM切割DNA的过程是必需的，EDTA和枸橼酸钠的络合作用则从反面印证了该结论。

Objective To study sister chromatid exchange fre quency in maternal peripheral lymphocytes and umbilical blood of pregnant women. It is objective to study causes and best assay about PIH.

目的 观察妊娠高血压综合征孕妇外周血及其脐血姐妹染色单体互换频率，探讨PIH的病因以提高PIH的检测水平。

In scc-3 mutant animals, normal SCs were not visible and ～24 DAPI-staining positive structures were seen in diakinesis, indicating that SCC-3 is necessary for the establishment or maintenance of sister-chromatid cohesion.

在scc-3突变型线虫细胞中，无法观察到正常的联会复合体，且在终变期出现大约24个DAPI染色阳性信号。

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