细胞分裂

Only amitosis takes place in both epidermal and hypodermal cell s of Firmiana simplex during cell division.

梧桐表皮细胞和下皮细胞的分裂只见无丝分裂而没有有丝分裂。2。

By using GFP-CaM fusion protein, we have observed the detailed dynamic redistribution of CaM in HeLa cells during cytokinesis.

我们采用绿色荧光蛋白标记技术，重点观察了胞质分裂期HeLa细胞中GFP-CaM的动态分布；应用三极细胞模型研究了CaM的分布与分裂沟形成之间的关系；还通过在胞质分裂不同阶段抑制CaM的活性研究了CaM在整个胞质分裂过程中的作用机制。

He type of ossein in group B was mainly type Ⅰ collagen while that in group A type Ⅱ and it exhibited as a process of fiber formation in group C. The reason for why TGF-β〓 can promote ossification induced by BMP is that can promote the differentiation and proliferation of mesenchymal cells to supply more target cells for BMP, promote the differentiation and proliferation of mature osteocytes and chondrocytes, inhibit metalloproteinase to decrease the destruction of bone tissue and promote calcification of bone matrix.

GF-〓能促进BMP骨诱导作用主要因其能促进间充质细胞的分裂增殖为BMP提供丰富的靶细胞、促进成熟骨及软骨细胞的分裂增殖、促进骨细胞产生Ⅰ型胶原而抑制软骨细胞产生Ⅱ型胶原，抑制金属蛋白酶的活性以减少组织破坏、促进基质钙化等作用而使骨生成能力增加，提示它和BMP具有协同作用。

The fern spore, the original cell of the gametophyte, carries out asymmetrical mitosis to produce a large cell and a small cell. The small cell geminates to a rhizoid by tip growth, and the large cell further divides and develops to become a prothallus.

蕨类植物孢子作为配子体的原始细胞，通过不对称的有丝分裂产生一大一小两个细胞，小细胞萌发出极性生长的假根，大细胞继续分裂发育为原叶体。

Some single embryogenic cells produced an embryonic cell and a suspensor cell by the first division and embryonal suspensor masses were produced after several divisions.

胚性愈伤组织中的一些单个胚性细胞经过第一次分裂产生两个细胞，即胚细胞和胚柄细胞，它们继续进行分裂几次以后形成胚性胚柄团结构。

Results: After 24h exposure to rhBMP-2, the expression of PCNA in HFCL cells decreased 0.65 fold by densimetric scanning. Observed after staining with the Wright-Gimsa, the numbers of cells with mitosis imaging decreased, but the morphologic change of cells did not happen. The HFCL cell numbers in S phsae decreased while in G1 phase increased, the cell cycle was arrested at G1 phase HFCL cells did not differentiate to myelocytic or mononucleate cells.

结果：经过rhBMP-2作用24h后，HFCL细胞PCNA表达下降，经灰度扫描下降幅度为0.65倍；瑞氏－吉姆萨染色后发现细胞核分裂像减少，分裂指数下降，但细胞形态没有变化；HFCL细胞S期中的细胞数量减少，G1期数量增多，出现G1期阻滞；rhBMP-2作用没有使HFCL细胞向髓系或单核方向分化的趋势。

Under normal temperature, anthers of not fertility restoration stopped developing in the stage of archesporical cell; 1-2 comers of a few anther could differentiate and form archesporical cell, sporogenous cells and microspore mother cell, but microspore mother cell disintegrated on the first meiotic division.

常温下，未发生育性恢复的花药在孢原细胞期就停止发育；少数花药1~2个角隅处可分化形成孢原细胞，造孢细胞，花粉母细胞，但花粉母细胞在减数分裂的第一次分裂时解体。

The situation of abnormal development of male cells is as follows:microspore mother cell can't enter into meiosis because of intense vacuolation,shrink and disintegration of its cytoplasm;although vacuolated microspore mother cell can enter into meiosis,it can't form normal dyad and degenerate in the middle process;dyad and tetrad become vacuolated and can't develop normally;cytoplasm of microspore shrinks around the nucleus at the stage of central nucleus microspore,the shape of microspore is twisted into crescent or irregular shape,at last its cytoplasm and nucleus are disintegrated and crescent vacant microspore presents;nutritive substances can't be accumulated at the stage of vacuolated microspore,cytoplasm is disintegrated,and microspore turns into a big vacant pollen.

雄性细胞异常发育有几种情况：小孢子母细胞强烈液泡化，细胞质收缩解体，不能进入减数分裂；小孢子母细胞液泡化，虽能进入减数分裂，但不能形成正常二分体而中途退化；二分体、四分体细胞液泡化，不能进行正常发育；单核小孢子中央期，细胞质收缩包围核，小孢子形状扭曲呈月牙形或不规则形，最终细胞质和核解体而呈月牙形的空壳小孢子；单核液泡期的小孢子不能积聚营养物质，细胞质解体而成为大的空壳花粉粒。

Results Metaphase multipolar mitoses and centrosome amplification were found in all HNSCC cell lines at the average frequencies of 9.9±4.8% and 6.7±3.1%separately.

结果 HNSCC细胞系多极核分裂像细胞平均占分裂中期细胞的9.9±4.8%，含中心体扩增的细胞平均占总体细胞的6.7±3.1%。且二者呈显著正相关，r=0.857，P＜0.01。

Methods Chromosome, HE stainings and autoradiography were made for the cornea of human and monkey.

目的 探讨灵长目动物角膜内皮细胞的再生能力及方式方法对猴及人角膜做染色体染色、HE染色及放射自显影结果成年创伤活体猴角膜内皮细胞有再生能力成年及幼年灵长目动物角膜内皮细胞在生理和病理条件下的再生方式均为无丝分裂结论灵长目动物角膜内皮细胞在一定条件下有再生能力，其再生方式为无丝分裂

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。