可是它仅仅在晶胚中才具有活性。
对于干细胞研究的态度，他说在2004年，某位科学家告诉他这项研究不涉及到道德问题，因为用于研究的晶胚无论如何都将被销毁之后，他的看法有了改变。
On stem cells, he says he changed his mind in 2004, after a scientist told him there was no moral issue involved because the embryos used in the research would be destroyed anyway.
胚胎干细胞研究的支持者们指出人的晶胚是在生育过程中形成的，大多数晶胚不是被破坏就是不明原因地被冻结了。
Proponents of embryonic stem-cell research point out that hordes of embryos are created during fertility treatment, and the vast majority of these are either frozen indefinitely or destroyed.
其他科学家也用这种方法，来检测他们是否能区分诊所制造的试管晶胚中，哪些是健康的，哪些是异常的。
Other scientists are using the technique to see whether it can distinguish between healthy and abnormal embryos produced in IVF clinics.
研究者们利用小鼠晶胚来培育脑组织，并且设定了一种环境，在此环境下，脑组织会逐渐流失左旋多巴胺神经细胞，这与帕金逊症的症状非常相似。
Using tissue from mouse embryos, researchers prepared brain cultures using conditions that favor the slowly progressing loss of dopamine neurons, a hallmark of the disease.
布什和一些接受了冷冻的晶胚而生下他们孩子的家庭都认为这的确是错的。
Yes, said Mr Bush on July 19th, flanked by some families who had “adopted” other people's frozen embryos and used them to have children of their own.
此外父母们还为自己应该如何处理自己多余的冷冻晶胚而烦恼。
Parents also agonise about what they should do with their surplus frozen embryos.
此外，研究人员还在另两种失效磷酸化蛋白和另外两类细胞——体外猴细胞和活体果蝇晶胚中，发现了类似的非对称有丝分裂。
Asymmetric mitoses were also observed in two other phosphorylated proteins primed for destruction, and in two other cell types: monkey cells in vitro, and Drosophila embryos in vivo.
非常有趣的是，发育中的哺乳动物晶胚的心脏在分化为四腔室前，与斑马鱼的双腔心脏非常相似。
Intriguingly, before the heart of a developing mammalian embryo separates into four Chambers, it looks similar to the two-chambered zebrafish heart.
缓凝剂在二水石膏晶胚表面的吸附，使其晶体生长受阻，成为水化的控制过程。
The adsorption of retarders on the surface of nuclei newly produced inhibits the crystal growth of dihydrate and accordingly controls the hydration process of gypsum.
缓凝剂在二水石膏晶胚表面的吸附，使其晶体生长受阻，成为水化的控制过程。
The adsorption of retarders on the surface of nuclei newly produced inhibits the crystal growth of dihydrate and accordingly controls the hydration process of gypsum.
应用推荐