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Aim:To observe the amitosis and asymmetric division in subcultured PC12 cells, and to explore the role of amitosis and asymmetric division in tumorigenesis, tumor cell pleomorphism and differentiation.

目的 :观察传代培养的PC12细胞的无丝分裂和不对称分裂,探讨其在肿瘤发生、肿瘤细胞多形性和细胞分化中的意义。

Under the assumption that the splitting function satisfies a Lipschitz condition, some convergence conditions of the discrete waveform relaxation schemes are given.

在假定分裂函数满足Lipschitz条件的前提下,通过矩阵正则分裂和特殊矩阵相关性质的运用,获得离散波形松弛迭代的收敛性条件,拓展和改进了相关文献中的一些结果。

Results indicated : The meiosis stages of megaspore of white poplars are different, while there was a association between MMCs and PMCs meiosis in the same hybrid.

研究表明,不同白杨的大孢子母细胞减数分裂进程存在差异性,而同一树种的大、小孢子母细胞减数分裂进程存在时序性相关。

Nidulans had a phenotype of cytokinesis defect. Sequence analysis showed that SEPH is 42% identical to the serine–threonine kinase Cdc7p from fission yeast. Deletion of sepH resulted in a viable strain that failed to septate at any temperature. This is the first direct evidence for the existence of a functional pathway like SIN in A.

在构巢曲霉中,温度敏感型菌株筛选发现的SEPH与裂殖酵母SIN信号中的丝-苏氨酸激酶Cdc7p具有42%的同源性,它可能是胞质分裂早期所必须的组分之一,当sepH 缺失时,会导致细胞死亡,这也直接证明了构巢曲霉可能也存在和SIN信号相类似的胞质分裂调节途径。

And the research materials were often meiotic pachytene chromosomes of sex gland and mitotic prometaphase of early embryos and diapause eggs\' somatic cells.

早期,家蚕染色体识别和基因定位研究主要利用性腺减数分裂粗线期的染色体、早期胚胎和滞育卵有丝分裂早中期的染色体作为材料,按照相对长度和部分限性易位系统或缺失等来进行核型分析。

The results of 3-D numerical modeling of the transversely isotropic media with horizontal symmetry axis and the orthorhombic symmetry media showed that quasi P wave,quasi-SV wave and quasi-SH wave occurred during elastic wave propagation in 3-D anisotropic media. Meanwhile, the special phenomena such as the S wave splitting, the blind zone of S wave splitting and quasi-SV wave-front triplication were clearly observed. In addition, the elastic wave-fronts are spatially changed, and the coupled relations among the quasi-P wave,quasi-SV wave and quasiSH wave in 3-D anisotropic media are very complex.

对方位各向异性介质模型和正交各向异性介质模型中弹性波的传播进行的三维数值模拟结果表明,弹性波在三维各向异性介质中传播时存在拟P波、拟SV波和拟SH波,并出现横波分裂、横波分裂盲区、波面三分叉等特殊现象,另外,性波场在空间是变化的,其拟P波、拟SV波和拟SH波的耦合关系比较复杂。

The development of Peiai 64S and IR36 did not differ up to microsporocyte formation stage; but since meiosis stage, male reproductive cells of Peiai 64S underwent several structural changes and ultimately terminated by early bicellular stage.

结果表明,小孢子母细胞减数分裂之前,培矮64S与IR36的发育过程基本相似。但从减数分裂开始,培矮64S的雄性性细胞出现一些异常变化,并最终发育至二胞花粉早期败育。

Positive and Negative Syndrome Scale , Global Assessment of Function Scale , Modified Overt Aggression Scale , Premorbid Schizoid and Schizotypal Trait and Premorbid Social Adjustment were used in assessment of various phenotypes in affected siblings. It was found that there were high similarities of these phenotypes in siblings with schizophrenia. The results suggested that common etiology, whether genetic or environmental factors, might existed in this pattern of family.

本研究采用阳性症状和阴性症状评定量表、功能全面评定量表、外显攻击行为量表、病前社会适应和病前分裂样分裂型特质对同胞患者进行评定,结果显示各种表现型具有较好的一致性,说明同胞对患者间具有相同的遗传、环境性家族致病因素。

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。

Thus it is obvious that the weak homology existedamong genomes A, B, D and 〓. However, the rare unreduced gemetes and near-unreduced ones with the loss of several chromosomes could be produced by the highlyunequtional division of univalents at the first meisis and the normal second division,which gave the F1 hybrid the partial fertility.

但通过第一次减数分裂时单价体的极不对称的分离及正常的第二次分裂,可形成少量未减数配子和丢失了少数几条染色体的近未减数配子,使杂种〓表现部分可育性。

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推荐网络例句

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

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。