中胚层细胞的

Metabolic activity quickly develops in the cells of the embryo and the aleurone layer .

胚细胞和糊粉层中的代谢活性立即活跃起来。

In the later period of ripeness, the protein bodies were extruded and filled with amyloplast.

成熟后期，蛋白质体因胚乳细胞中大小淀粉体的充实被挤成片层结构而填充在淀粉体缝隙中。

These epithelial elements arise embryologically from foregut endoderm in the process of bronchial tubular growth.

这些表皮细胞在胚胎学上把源于支气管生长过程中的前内脏叫内胚层。

Results: Mast cells in uterus were mainly distributed in the myometrium, only a few in the endometrium. After ovum implantation ,the mast cells were comparatively less at the place of implantation. The number of mast cells of early and late pregnancy(1～5 dyas, 15～19 dyas) was apparently higher than that during middle pregnancy(P＜0. 05). Stained by alcian blue-safranin, both red and reddish blue mast cells decreased gradually in number during pregnancy, but the proportion of blue mast cells was increased. Critical electrolyte concentration of mast cells decreased as time went on.

结果：(1)肥大细胞主要分布于子宫肌层，子宫内膜较少，且胚泡植人部位的肥大细胞明显少于非植入部位；(2)妊娠早期(孕1～5d)和妊娠后期(孕15～19d)肥大细胞数显著多于妊娠中期(P＜0.05)；(3)Alcian蓝藏红组化染色后，可见妊娠过程中红色和红蓝混合色肥大细胞逐渐减少；蓝色肥大细胞所占比例逐渐增大，孕9～19d肥大细胞几乎全部为蓝色；(4)肥大细胞临界电解质浓度值随妊娠时间的推移而变小。

From the study, we conclude that bFGF has the differentiative, migrative and mitogenic functions in the developing chick neuroretina.

由本实验中，我们推论在鸡胚神经网膜层发育期间，bFGF具有分化、移行和细胞分裂的功能。

Notch1 is expressed by stem cells resided in the cervical loop epithelium, and Notch signaling pathway play a central role in fate decision of those stem cells. Notch receptors and their ligands are involved in both patterning and cell fate determination during odontogenesis. Moreover, many cell factors, which are closely related with odontogenesis, could regulate expression of Notch receptors or their ligands.

既往研究显示：早在牙齿发育期，Notch1就表达于颈环星网状层的干细胞中，是其保持干细胞性质的重要机制；Notch-Delta信号还与成釉细胞、成牙本质细胞分化有关，被认为是牙齿发育细胞分化多样性的原因之一；另外，目前已明确与牙胚细胞分化有关的生长因子如TGFβ、FGF、BMPs等均可诱导Notch受、配体的表达。

BACKGROUND: At present, studies show that a kind of stem cell community which in many kinds of organizations can differentiate into tissue cells of different embryonic layers; but those are different from embryonic stem cells, embryonic stem cell will lose the part differentiation potential gradually during the development of pregnancy, and will present some special phenotypes or the molecular markers, as CD105 and so on, will call it postembryonic pluripotent stem cells.

背景：目前研究认为在胚胎发育后的多种组织中存在一类干细胞群体，可分化为不同胚层的组织细胞；但又不同于胚胎干细胞，随着妊娠期间胚胎的发育胚胎干细胞会逐渐失去部分分化潜能，会出现一些特殊表型或分子标记，如CD105，称其为胚胎后亚全能干细胞。

GFP fluorescence was visible early at the 2-cell stage and then became stronger in the blastocysts of all three species. However, the distribution of the GFP signals was restricted to the cells of inner cell mass and no fluorescence was detectable in trophectoderm cells.

结果显示：牛Oct-4启动子驱动的GFP基因在3个物种的2-细胞胚胎就已经开始表达，在囊胚期表达加强且只特异表达于内细胞团中，而不表达于滋养层。

There were all kinds of tissue cells in the teratomas acquired from in-vitro differentiation, such as, neuro epithelium, skeletal muscle, respiratory epithelium. This further proved the isolated mouse ES cells could differentiate into three germ layers of tissue types.

体内分化实验所获得的畸胎瘤中存在各种组织细胞，如一些神经上皮样组织；横纹肌；呼吸上皮样组织等，这进一步证明所分离获得的小鼠ES细胞具有三个胚层的分化能力。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。