细胞分裂

Ovule development began in August, and rectangle megasporocyte began to occur in December, and linear tetrads of megaspores were formed in meiosis. In most occasions, only the chalazal megaspore was functional.

云南红豆杉胚珠从8月开始发生，大孢子母细胞12月开始发生，呈方形，减数分裂后形成4个&一&字形大孢子，在大多数情况下，只有靠合点端的大孢子发育为功能大孢子。

Megaspore development and abortion of"Pingyi Tiancha"Compar-ing with regular developing megaspore of normal M.baccata,the megasporemother cellof"Pingyi Tiancha"could form mono-nucleus embryo sacby perhaps irregular meiosis,then most of sexual MES depauperatedand degenerated,finally aborted,or only a few further developed.Of asexualembryo sac,one or more large cells at the chalazal end of nucellus developed in-to one to more asexual embryo sac initials.After the competition between sexu-al embryo sacand asexual embryosac,most ovules only had one asexual embryo sac matured.

平邑甜茶大孢子的发育和败育与正常发育的山定子大孢子对比，平邑甜茶大孢子母细胞经减数分裂能形成单核胚囊，之后多数有性胚囊萎缩、退化而败育，只有极少数进一步发育；而无性胚囊则从胚珠合点端1个或多个较大的珠心细脆形成并首先发育为一个或多个无性胚囊原始体；经过有性胚囊和无性胚囊以及无性胚囊和无性胚囊之间的竞争，多数胚珠只有一个无性胚囊成熟。

They stimulate endothelial cell proliferation and the growth of new blood ve els by releasing endothelial mitoge and chemotactic factors, such as bFGF and vascular endothelial growth factor .

它们能刺激内皮细胞的增殖和血管的生长，通过释放内皮有丝分裂和化学趋化因子，例如bFGF和血管内皮生长因子。

Then, the proliferative ability of OPCs in vitro was also investigated with the MTT assay.4. The contusive injury of spinal cord in a rat model was produced by the means of the weight-drop impact of Allen's method. The experimental animals were randomly divided into 4 groups, i.e. OPCs transplant group, transplant control group, plain injury group and sham operation group.

OPCs在体外化学条件培养基中继续生长，通过相差显微镜连续观察和免疫细胞化学技术检测研究分析体外条件下OPCs的定向分化规律和分化成熟情况，并采用MTT检测法研究分析OPCs在体外条件下的分裂增殖能力。4。

The antibacterial activities of most of fractions were similar to the pomegranate peel extract.(7) Respiratory inhibition experiment showed that the respiration of thallus was inhibited mainly through the hexose monophosphate pathway, which leaded to be short of NADPH, and induced metabolic function dysfunction. Growth curve assay showed that the pomegranate peel extract inhibited cytodieresis in logarithmic growth phase. After exposure to the pomegranate peel extract, bacterial protein was analyzed by SDS-PAGE. The results showed that protein synthesis was inhibited, especially for large molecular weight protein.

7呼吸抑制试验结果表明，石榴果皮提取物主要是通过抑制HMP途径，导致还原力NADPH缺乏，引起代谢功能障碍，达到抑菌的目的；加药组和正常组金黄色葡萄球菌生长曲线的对比结果表明，石榴果皮提取物能够抑制金黄色葡萄球菌对数生长期的菌体分裂；SDS-聚丙烯酰胺凝胶电泳分析表明，石榴果皮提取物能够抑制菌细胞蛋白合成，尤其对菌体内大分子量蛋白作用最明显。

There was no cytologic atypia, necrosis, or increased mitotic actiity.

没有细胞非典型性的、坏死、或有丝分裂活动的增加。

As there were 8.69 bivalents in average occurred to be desynaptic, moreover, the most number of the desynaptic bivalents reached 12 at post diakinsis.

从品种轮回422的群体中发现一不育单株，经细胞学观察证明是发生了联会消失突变，由于该植株的花粉母细胞在减数分裂终变期晚期平均有8.69个二价体发生了联会消失，占二价体总数的72.4%，并且发生联会消失的最多二价体数目为12，根据联会消失的最多二价体数目

The cleavation rates and blastocyst development rates of cloned embryos were used to assess the efficiency of different operational procedure. Finally, the best combination of operational procedure, that the spindle-viewer system was used for oocytes enucleating, and donor cell was electrofused into ooplasm by electrical pulse (1.9 kV/cm, 10 ms, two) to reconstruct bovine cloned embryos.

以核移植胚胎的卵裂率、囊胚发育率作为检测指标，对不同的方法所获得的克隆胚胎的卵分裂率与囊胚发育率进行比较，最后筛选获得1个优化的牛体细胞核移植操作程序，即采用Spindle view系统对牛卵母细胞进行去核操作，将供核体细胞注射到卵周隙，然后通过电融合法将供体核引入去核卵细胞质(电融合参数为1.9 kV/cm，脉冲时程10 ms，方波2次间隔2 s)。

The human engrailed homolog En2 functionally substitutes the role of ceh-16 in promoting self-renewal expansion division of seam cells.

此外，ceh- 16突变后还会影响线虫中一个多巴胺神经元的形成，作者还证明这种异常表型也是和侧线细胞的不对称分裂和Wnt信号通路有关。

Figure8 10×40The epicyte colouration of the tumor cell is positive to CD21, and performs nuclear division, but the lymphocyte and acidophic cell is negtive.

图8 10×40 CD21胞膜染色阳性，可见核分裂相，而淋巴细胞及嗜酸性细胞阴性

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了