胚胎

Epidermal stem cells isolate from embryonic ectoderm, mostly locate on the eminentia of upper hair follicle and stratum of hair-lack regions such as palm.

表皮干细胞来源于胚胎的外胚层，毛囊上半部的隆起处数量众多，在缺乏毛发的手掌等处位于表皮的基地层。

The results indicate that day 5 p.c.primitive ectoderm cells are able to participate in embryogenesis after be-ing introduced into day 4 p.c.blastocysts and result in the production of adult chimeras.

嵌合体与C_(57)BL/6 J小鼠交配后所得的结果表明，原始外胚层细胞在嵌合体内能形成有功能的配子。上述结果说明，原始外胚层细胞与内细胞团细胞、体外培养的胚胎干细胞一样，具有发育全能性。

The part of the ectoderm in a vertebrate embryo that lies on either side of the neural tube and develops into the cranial, spinal, and autonomic ganglia.

神经脊，脊椎动物胚胎外胚层的一部分。位于神经管的两侧，并逐步发展成头颅神经元、脊髓神经元、自主神经系统神经元

Objective To study the factor affecting the efficiency of establishment of parthenogenetic stem cells in mice.

目的 检测孤雌胚胎干细胞系的建系效率与小鼠品系以及培养体系的关系。

There are commonly eight nuclei in the embryo sac: the egg apparatus at the micropylar end, made up of an gee nucleus and two synergid nuclei; three antipodal cells at the oppsite chalazal end that probably aid embryo nourishment; and two polar nuclei in the center that fuse to form the primary endosperm nucleus.

通常胚囊中有8个核，卵器在珠孔端，由卵和两个助细胞组成；3个反足细胞在合点端，可能为胚胎提供营养；胚囊中央有2个极核，融合在一起形成最初的胚乳核。

Contents of calcium and phosphorus in eggshell changed relatively slightly in 0~16 embryonic ages.

钙、磷、钾是构成生物体的重要成分，是影响胚胎发育的重要因素。

Embolus was checked for the fertilized mouse next day and it was 0.5 days of fertilization.

一、杂种胚胎来源的ES细胞系的分离与鉴定 1。

We find that the external appearance of the embryo and its sac s during the alaqah stage is similar to that of a blood clot.

我们发现胚胎在血块阶段的外观和囊袋很像一块凝血。

Starch grains present in the embryo sac and placenta are utilized by the embryo.

存在于胚囊和胎座中的淀粉粒为胚胎所利用。

The status and protection of the human embryo in vivo and in vitro is discussed below.

下面讨论人类的体内和体外胚胎的地位和保护的问题。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。