中胚层的

The content of soluble protein rapidly increased with the embryo development after pollination for 16 days, while BiP markedly increased from 22nd day after pollination. The BiP failed to respond to heat shock. Immunohistochemical localization showed that BiP localized in plumule, primary vascular tissue and aleurone layer during embryo development.

组织化学免疫定位表明，在玉米胚发育的不同时期，BiP主要定位在胚芽端、初生维管组织和糊粉层中，提示胚在构建器官的同时，也为其功能执行准备了条件；热激不影响其定位。

The expression of MMPs in eutopic endometrium is different in menstrual cycle, and different kinds of MMPs could be found in endometrium stroma, which may play a role in endometrium remolding, blastula implantation and trophoblast invasion.

在人的正常子宫内膜组织中，不同的MMPs在月经周期中的表达不同，子宫内膜间质可表达数种MMPs，这些酶可能参与子宫内膜重建、囊胚种植及滋养层浸润。

Tetraploid embryos could be produced by electrofusion at the stage of two-cell embryos, which could develop to blastocysts followed by fusion of cyto-plasm and nucleus and cleavage in vitro. During the fusion of cytoplasm, the DNA methylation levels of the fused embryos are as high as these of two-cell diploid embryos in vivo Then the embryos are rapidly demethylated when the nucleus begin to fuse, resulting in the lowest DNA methylation levels when the nucleus are fused completely. After that, the DNA methy-lation levels of the fused embryos are gradually increased until the morula stage. However, whereas an asymmetric distribu-tion of DNA methylation is established in vivo-derived blastocysts with a higher methylation level in the inner cell mass than that in the trophectoderm, we can not detect the asymmetric distribution in most in vitro-derived tetraploid blastocysts.

结果表明：利用电融合方法制备的小鼠四倍体胚胎在体外培养体系中经历细胞质融合、细胞核融合及细胞继续分裂发育直到囊胚期的过程，在细胞质融合的时候胚胎卵裂球同体内体外培养二倍体胚胎一样，呈现高度甲基化状态；在细胞核开始融合的时候，甲基化水平急速下降，在细胞核完全融合的时候甲基化水平达到最低点；随着胚胎继续分裂，胚胎甲基化水平逐渐增加，在桑葚胚期甲基化水平最高；但是囊胚期四倍体胚胎内细胞团同滋养层细胞甲基化荧光信号没有差别，这与体内体外培养二倍体囊胚内细胞团细胞甲基化荧光强度高于滋养层细胞甲基化荧光强度不同。

Tetraploid embryos could be produced by electrofusion at the stage of two-cell embryos, which could develop to blastcysts fellowed by fusion of cytoplasm and nucleus and cleavage in vitro.After fusion of cytoplasm, the DNA methylation levels of the fused embryos was very high as well as two-cell diploid embryos in vivo.Then the embryos was rapiddly demethylated when the nucleus begin to fuse, resulting the lowest DNA methylation levels when the nucleus fused completely.After that, the DNA methylation levels of fused embryos were gradually increased until the blastocysts stage.However, whereas an asymmetric distribution of DNA methylation was established in an vivo-derived blastocysts with a higher methylation level in the inner cell mass than in the trophectoderm, in most vitro-derived tetraploid blastocysts, we can not detect the asymmetric distribution.

结果表明：利用电融合方法制备的小鼠四倍体胚胎在体外培养体系中经历细胞质融合、细胞核融合及细胞继续分裂发育直到囊胚期的过程，在细胞质融合的时候胚胎卵裂球同体内体外培养二倍体胚胎一样，呈现高度甲基化状态；在细胞核开始融合的时候，甲基化水平急速下降，在细胞核完全融合的时候甲基化水平达到最低点；随着胚胎继续分裂，胚胎甲基化水平逐渐增加，在囊胚期甲基化水平最高；但是囊胚期四倍体胚胎内细胞团同滋养层细胞甲基化荧光信号没有差别，这与体内体外培养二倍体囊胚内细胞团细胞甲基化荧光强度高于滋养层细胞甲基化荧光强度不同。

The metazoans in the Wenghui Biota had radiate symmetrical animals, including Porifera, Ctenophora, Cnidaria, and Trilobozoas, and bilateral symmetrical animals, including Annelida and possible Mollusca.

瓮会生物中宏体后生动物有海绵类、栉水母类、刺胞类和三叶类等两胚层辐射对称动物以及环节类和可能的软体类等三胚层两侧对称动物。

In higher vertebrates, such as mammals and birds, the mesoderm and endoderm are generated from an axis running through the centre of the embryo.

在高等脊椎动物中，中胚和内胚层在胚胎中心的轴部产生。

Transcripts of zebrafish Hspa5 are present in fertilized eggs, suggesting their maternal origin. Zygotic expression of Hspa5 starts during midgastrulation and occurs in the hypoblast cells. It is specifically expressed in the hatching gland and the notochord during segmentation.

结果表明，Hspa5 mRNA在卵子中就存在，是一个母源基因；其合子基因的表达开始于原肠中期的下胚层，在体节期发生在脊索和孵化腺中。

We generated EG4-GFP cell lines expressing enhancing green fluorescence protein which still maintained typical characteristics of pluripotent stem cells. We microinjected green cells into perivitelline of 8-cell stage embryos as well as aggregated them to 8-cell stage embryos with zona pellucida removed, to investigate developmental fate of EG4-GFP cells during formation of chimeric blastocysts.

我们建立了稳定表达绿色荧光蛋白的EG细胞系（EG4-GFP），发现该细胞仍能保持野生型的一般生长特性；通过显微注射和体外聚集得到细胞与8-细胞受体胚胎共同发育形成的嵌合胚，发现转基因细胞参与了胚胎早期发育过程中的生长与分化，大部分细胞集中于内细胞团，也有细胞分化为滋胚层细胞。

Geochemical study indicates that constant elements, microelements and trace elements in manganese ores and protore wholly take on thermal sedimentary characteristics, the siliceous limestone, silica-bearing limestone and bioclastic limestone is predominant protore beds of manganese-capped ores.

通过对锰矿石和矿胚层岩石中常量元素、微量元素及稀土元素等地球化学的研究，均具有热水沉积的特征，硅质灰岩、含硅质灰岩和生物碎屑灰岩是锰帽型矿石最主要的矿胚层。

Although Pygo expressed ubiquitously in the embryo, it expressed at relatively high level in pre-blastoderm embryos which indicated a high degree of maternally provided message, followed by a low level of ubiquitous zygotic expression.

结果表明，虽然pygo普遍表达于整个胚胎中，并且在果蝇胚胎发生全过程都有，但Pygo在前囊胚层(pre-blastoderm)中的表达水平相对较高，这说明胚胎发生过程中来自母方的贡献较高。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了