胚细胞

In addition, germ-line epimutations of other tumor suppressor genes, such as MSH2 and BRCA1, have also been reported, demonstrating that epimutations might arise in the germ-line (during gametogenesis or early embryonic development).

随后，关于其他抑癌基因MSH2与BRCA1等的胚系异常甲基化也陆续有报道。这提示，表观突变也可以起源于胚系（生殖细胞形成期或胚胎发育早期），从而造成全身细胞广泛的基因转录沉默。

The neural stem cells can be isolated from human embryonic cerebral tissue . The ratio of cell clone formation from smaller gestational age is higher than that from elder gestational age .The differentiation of neural stem cells from hindbrain is easier than that from forebrain.

从人胚脑组织的前、后脑中分离出神经干细胞；较小胚龄的脑组织原代培养时细胞克隆的形成比例较高；后脑组织分离的南京医科大学硕士学位论文神经干细胞比前脑组织来源的更容易分化。

In the fin219-null mutant background, GUS staining can be detected in the hydathode of cotyledons, and the guard cells around hydathodes. GUS staining are also found in the base of trichomes, hypocotyls and roots. In contrast, in the phyA mutant background, GUS-FIN219 was not expressed in the hypocotyls.

结果发现转殖在fin219-null突变株背景下，FIN219会特别表现在植株叶缘出水孔与附近的保卫细胞及毛茸基部、初生叶、下胚轴、根部等处，然而在phyA缺失的时候植株幼苗的FIN219则不会在下胚轴表现。

Both the new peniculus 1 and the old haplokinety separated at the telophase.The two germinal rows germinal rowsfor both the daughter cells appeared almost at the same time;(2) The macronucleus became shorter and thicker, finally oblate during the division of the cell. Then the macronucleus restored its original shape, band-like form. The micronucleus were divided into two before the macronucleus division;(3) The original scopula and stalk contributed to the old cell. The new cell formed scopula gradually after the cell division.

同时，新仔虫的第一咽膜(P′1)也开始由老单毛基索复制，并在细胞分裂后期与老结构分离；(2)大核在虫体分裂过程中由长带状逐渐缩短变粗至扁圆形，于虫体即将分开时迅速拉长，然后分裂为二个新大核；小核分裂先于大核，在两仔虫口纤毛器即将分开时完成；(3)原帚胚及柄归属老仔虫，新仔虫的帚胚在虫体分裂后逐渐形成，柄内肌丝则在柄鞘形成后逐渐长出。

Although the megagametophyte formed and even the double fertilization had been finished 70 days after pollination at normal temperature, the megasporogenesis had not yet been finished at low temperature.

低温(12-18℃)处理的蝴蝶兰，授粉50d开始分化胚珠原基、60 d胚囊处于大孢子母细胞时期，比常温(20-25℃)下的推迟10-15 d；授粉70 d，常温下的蝴蝶兰植株已完成雌配子体发育和双受精，而低温处理的蝴蝶兰仍未完成大孢子的发生过程。

The zygote, by cell division, grows into a morula an then into a blastocyst.

通过细胞分裂，受精卵发育成桑葚胚，然后发育成囊胚。

Morula in the uterine cavity to continue cell division to form the blastocyst, about 6-8 days after fertilization into the endometrium, a process known as implantation or cultivation.

桑椹胚在子宫腔内继续细胞分裂形成胚泡，大约在受精后6—8天进入子宫内膜，这个过程叫做着床或种植。

The larva-specific expression level of the function correlated to celluar components was the highest.The highest specific expression level of molecular function was appeared at neurula stage.A lot of functional specific expression about biological process was also appeared at neurula stage.7.The result showed that the pearson correlation coefficient was 0.896 compared between the sea urchin and Ciona savignyi.

进一步分析发现：在与细胞组件相关的功能特异性表达方面，幼体期的特异性表达量最高；在与分子功能活性相关的功能特异性表达中，神经胚时期的特异性表达量最高；而参与生物过程的功能特异性表达方面，神经胚时期的特异性表达量则最高。7不同物种间转录组分析显示尾索动物海鞘的转录组与棘皮动物海胆的最接近，其相关系数为0.896，而海胆与文昌鱼的相关系数只有0.682，结果表明在进化上文昌鱼可能与脊椎动物更接近。8运用Apache、php、MySQL技术搭建了Widows平台的文昌鱼EST分析数据库。

Phosphatases all took part in transporting degraded product of nucellus, transporting reverse material from apoplast to endosperm cell, degeneration of starchy endosperm nucleus.

磷酸水解酶共同参与了珠心降解产物向胚囊中的运输、营养物质从质外体向胚乳细胞中的运输、细胞核的解体。

In this study, we investigated the gene expression pattern of Cbfal in odontoblast as well as tooth development by gene cloning and in situ hybridization. The results revealed the essential role cbfal plays in tooth development.

本研究采用基因克隆与原位杂交的方法，研究了cbfal在牙乳头细胞及牙胚发育中的表达，初步证实了cbfal在牙胚发育中的作用，同时，作为整体实验设计的一部分，本研究所构建的cbfal cDNA探针及反义核酸cbfal真核表达载体为对cbfal进一步的研究奠定了基础。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。