胚胎

BACKGROUND: Compared with adult mesenchymal stem cells, yolk sac-derived MSCs of early embryo have stronger self-renewal capacity and plasticity. Moreover, they could differentiate into angioblast and hemopoietic stem cells during embryonic development and trigger embryonic angiogenesis and hemopoietic tissue development.

背景：与成体间充质干细胞相比，来源于早期胚胎的卵黄囊间充质干细胞有更强的自我更新能力和可塑性，且在胚胎发育过程中可分化为成血管细胞和造血干细胞，启动胚胎血管发生和造血组织发育。

In conclusion, either electrofusion parameter or developmental stage of donor embryos have a significant effect on the efficiency of NT, NT embryos require different concentration of serum at their different development stages.

结果表明，电融合参数和供体胚胎的发育阶段以及受体卵母细胞的状态对NT效果有显著影响，在NT胚胎的不同发育阶段采用不同的血清种类和浓度可提高其胚胎发育能力。

Relationship between longans embryo development and changes of polyaminesThe thesis also studied the relationship between longan embryo development and contents of polyamines . Experiments showed that the contents of polyamines in normal ovules were higher than those in abortive ones during the whole embryogenetic process.

龙眼胚胎发育与多胺的变化研究了龙眼胚胎发育与多胺含量的关系，结果表明：正常发育的胚珠中多胺含量在胚胎发育的各个时期均高于败育胚珠。

Spd and Spm evidentlydropped more rapidly in the abortive ovules than those in the normal ones,which indicats that lower contents and more rapid decrease of Spd and Spmduring the embryogenetic process might have a close relationship withembryo abortion.The studies also showed that iow ratios of nn-1and nn-1might hinder embryo development.

败育胚珠中的Spd和Spm含量在胚胎败育期的下降速度显著大于正常胚珠，两者含量低以及在胚珠发育进程中较大的降幅与胚胎败育密切相关。nn-1和nn-1比值低亦不利于胚胎发育。

A substantial proportion of early embryo death and miscarriages are caused by chromosomal, anatomical and endocrinological abnormalities, up to 40% of fetal losses remain a consequence of unexplained aetiology.

有一定比例的早期胚胎死亡与胚胎染色体畸变、性器官解剖病变及母体内分泌紊乱有关，但是超过40%的早期胚胎死亡原因不明。

"We hae a kind of collision course between the public policy at the federal leel in the United States and what the people who are responsible legally and ethically for these embryos would like to do with their embryos," Ruth Faden, director of the Johns Hopkins Berman Institute of Bioethics, said.

Johns Hopkins Berman学院生物伦理学主任Ruth Faden说：&在美国联邦政府的市民政策和那些捐献胚胎的人应该怎么处理他们的胚胎之间有一个碰撞过程，这些人在法律上和道义上对这些胚胎负有责任。&

The assay shows abnormality in 63 of 118 cases (53.4%) of G-I tract cancer, 28 of 116 cases (24.14%) of Gyn. cancer and 13 of 37 cases (35.1%) in other organ's neogrowths.Raised serum levels of CEA occur in many non-colonic cancers.

其中之消化道肿瘤有118例，63例血清癌胚胎抗原测值，呈异常升高佔53.39%； 116例女性生殖器官肿瘤中，血清胚胎抗原测值超过3.5ng/ml的，有28例佔24.14%： 37例其他部位肿瘤患者中，有35.14%（13例）血清癌胚胎抗原测值，大於3.5ng/ml。

After transfer of 13 twin blastocysts to recipients, 3 and 2 twin fetuses were obtained, These findings indicate that monozygotic twin mice can be produced more efficiently from F1 embryos than from CD-1 embryos.

在添加生长因子与未添加生长因子的胚胎中，分别有92％和86％的胚胎发育为孪生囊胚。13对胚胎移植后，分别产生了3对和2对孪生小鼠。

The study was done to compare the induction efficiency of human embryonic stem cells to neuroepithelial progenitor cells in human embryonic fibroblasts,mouse embryonic fibroblasts and feeder free systems.

中文摘要：［摘要］比较人胚胎干细胞在人胚胎成纤维细胞、鼠胚胎成纤维细胞饲养层和无饲养层3个诱导体系下形成神经上皮祖细胞的能力。

Results The results indicated that SIPAR was expressed in otic vesicles and eye vesicles obviously in mouse dpc9.5 embryo.

结果 SIPAR在dpc9.5的小鼠胚胎眼泡和听泡中有明显的表达，在dpc9.5～12.5的小鼠胚胎脊柱神经和脑部中枢神经都有表达，在dpc12.5小鼠胚胎脑、眼泡和脊柱中表达增强。

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。