胚胎

Mouse zygotic genome is activated at the two-cell stage which implies that embryonic development is transferred from the oocyte itself to the embryo.

在小鼠胚胎发育研究中发现，小鼠的基因组激活发生在2细胞期，这一时期标志着合子的发育由卵母细胞控制向胚胎控制的过渡，期间发生一系列复杂的生化过程。

Bicoid is one of the important Drosophila genes involved in the control of embryo polarity arid larvae segmentation. The protein encoded by bicoid is a homedomain-containing transcription factor, which organizes a group of polycomb genes expressed in early development of embryo and therefore named morphogen.

Bicoid是调控果蝇胚胎极性及以后分节发生过程的重要基因，这一基因编码的蛋白是一种转录调控因子，对一组早期胚胎发育过程中的多齿基因的表达具有调控作用，并被称为形态发生剂。

But when doctors defrosted and implanted them last year, no one expected all three to take hold.

去年，医生将其余受精胚胎解冻后植入了海伦的子宫，但当时没人奢望这三个胚胎能完全成活。

Other ground had reported that the level of mouse bex1 mRNA differenced with the development stage of testis, but nothing had been known about its functions in brain. We cloned the mouse Bex1 gene and characterization of its expression pattern in the mouse central nervous system.

我们首先克隆得到小鼠的Bex1基因，检测小鼠不同发育时期胚胎中Bex1mRNA的表达变化情况，发现它在成年鼠脑中的表达量大大低于小鼠胚胎，说明它确实与小鼠脑的发育相关。

Early embryos in vitro culture system in one of the basic technologies in embryonic engineering.

早期胚胎体外培养系统是进行胚胎工程研究的基本技术之一。

Embryoes of rat on day 9.5 of gestation were explanted and cultured with exposure to fluoride 30ug/ml rat serum for 8,16,32 and 48 hrs respectively.

应用大鼠植入后全胚胎培养，在氟离子浓度为30μg／ml于胚胎培养的不同时间段染毒，观察卵黄囊直径、血管分化形成及超微结构的改变。

These include immortalized stem cell lines, neural progenitors prepared from embryonic and adult animals and mesenchymal stem cells.

这些措施包括永生化的胚胎干细胞，来源于胚胎的和成年动物的神经祖细胞以及间充质干细胞。

Methods: The hEGcs from the gonadal ridges and dorsal mesenteries of human embryos aged 5-10 weeks were cultured with or without cytokine in culture medium to observe their growth and the effects of different cell culture systems were compared.

目的：优化人胚胎生殖细胞的体外培养体系，并将生长状态良好的传代的人EG细胞移植用于大鼠心肌梗死模型的治疗，探讨人胚胎生殖细胞进行异种移植对大鼠心肌梗死的治疗机制。

Objective: To determine whether the cells that we obtained from the in vitro culture of human embyonic genital ridges and dorsal mesenteries were the undifferentiated human embryonic germ cells , to find out the best kind of passaging method , and finally to identify these serial passaged cells .

目的：鉴定组织块培养法体外培养人胚胎生殖腺嵴和背侧肠系膜所获得的细胞为未分化的人胚胎生殖细胞；尝试不同时间和不同方法对人EG细胞进行传代培养，探讨最佳传代时机和传代方法；并确定传代培养的细胞仍为未分化的人EG细胞。

Methods Primary human embryonic germ cells were obtained by tissue culturing of embryonic genital ridges and mesenteries from the embryos aged 8 weeks, and then were passaged on the 8th and 16th day using pick-up and digestive passage method. Three kinds of digestive juice were used.

取8周人胚胎的生殖腺嵴和肠背系膜，进行组织块体外培养人胚胎生殖细胞，选择原代培养第8天和第16天的细胞，采用挑取传代法和消化传代法，其中的消化传代法采用三种不同的消化液进行传代培养，记录各代培养的细胞集落数。

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。