核分裂

The micronucleus and abnormal division in Allium sativum root tips induced by polluted river water were investigated.

研究污染的河水对大蒜根尖细胞微核的诱导及细胞分裂的效应。

Above results suggest that the nuclear genes controlling amyloplast development may express in the uninuclear microspore and continue to be active in the VC, while the genes controlling plastid dedifferentiation may be promoted in the GC after the first mitotic division.

以上结果表明可能控制造粉质体的核基因在单核小孢子中表达并继续在营养细胞中起作用，而控制质体脱分化的基因在第一次有丝分裂后才在生殖细胞中被启动。

Wilms tumors with unfaorable histology contain anaplasia – defined as the presence of hyperchromatic, enlarged nuclei (at least 3 times as large as blastemal nuclei), and multipolar mitotic figures.

如有细胞间变则提示Wilms'瘤预后不良，所谓细胞间变，表现为染色质粗糙，胞核增大（至少是后肾胚芽细胞核的3倍大小）以及多极性有丝分裂像。

Four different pathways of androgenesis have been observed:Pathway of vege...

在雄核发育的研究中，观察到有营养细胞发育途径，生殖细胞发育途径，营养细胞和生殖细胞混合发育途径，以及均等分裂发育途径等四种类型，并对这四种途径进行了讨论。

A dramatic remodeling of interpolar microtubules into an organized central spindle between the separating chromatids is required for the initiation and execution of cytokinesis.

因此为了保证有丝分裂期核内事件的准确进行，在间期，对相关的重要蛋白质的核内稳定性的准确调控尤其重要。

Unicolor. There were unequal bivalents, homologous chromosome deconjugation, chromosome brige, unequal separation, laggard chromosomes, chromosome outside nucleus, micronuclei arid so on.

unicolor小孢子母细胞减数分裂异常进行了研究，发现存在不等二价体、同源染色体早分离、染色体桥、不均等分离、滞后染色体、核外染色体、微核等。

Result There was no significant difference to the number and length of parenchyma cell in the uppermost internode between Shuangdi Pei eS and Shuangdi S in meiosis and dikaryon pollen stages;there was significant difference to those in tikaryon pollen stage, and there was very significant difference to those in anthesis and the 7th day after anthesis,and on the 7th day after anthesis,the difference to the number and length of parenchyma cell in the uppermost internode between Shuangdi Pei eS and Shuangdi S was the greatest.

长穗颈双低培eS与双低S穗颈节间薄壁细胞数及细胞平均长度在减数分裂期和二核花粉期差异不明显，于三核花粉期差异达显著水平，始花当天和始花后第7天均达极显著水平，其中始花后第7天时两者的差异最大。

The proliferating cells were mainly distributed in the peri-chondrium and the peripheral zone of tracheal cartilage. The senescent chondrocytes were distributed in the central zone whereapoptotic morphological characteristics obviously appeared, such as pyknosis, karyorrhexis.

结果：软骨细胞呈现多种方式的无丝分裂像；气管软骨膜与软骨周围带多见细胞增生；气管软骨中央带多见衰老的软骨细胞，并见明显核固缩、核碎裂等细胞凋亡形态学特征。

It has been known that the contour of the nucleus of some malignant cells was not regular, and the perinuclear cisternae as well as the internal dense lamillae was thicker than that of the normal cells.

可见，肝癌等恶性肿瘤细胞核膜表面积与核体积的比例显著大于对照肝细胞，约增长了40%，定量证实了肿瘤细胞核膜可随不断增殖分裂的需要而增加其核膜表面积。

Karyotypes of root tip chromosome showed that the arm volume ratio, the mean relative volume and idiogram were identical before and after improving seed vigor, so the pattern of chromosome did not change. But we couldnt confirm whether the pattern of other separation dates and the inner structure varied in this experiment, such as gene mutation.

根尖染色体核型分析结果，甘蓝种子在活力提高前后染色体的臂比值相同，相对长度相同，表明活力提高后染色体在形态及核型上无明显变化，而对于除中期外的其它分裂期染色体的形态特征以及染色体内部结构有无明显变异在本试验条件下尚不能确定。

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