For the first time, scientists around the world had a limitless number of cells they could use to test the effects of diseases, medicines and chemicals.
VOA: special.2010.07.21
I said this sentence in one of the first two classes, 'all cells are the same', and you know that's true.
我曾在头两节课的哪里讲过,所有细胞都是一样的,你们知道的
The way we did this was to coax embryonic stem cells first to develop into the surface layer.
我们是这么做的,先诱导胚胎干细胞,发育成外胚层。
Jonas Salk used these HeLa cells to test the first vaccine for polio.
VOA: special.2010.07.21
One, at the first level, what are the cells that make up that tissue?
其一,在第一个层次上,构成那个组织的是哪些细胞呢
Working at the leading edge of research on cellular biology and genetic skin disorders, Fuchs was the first to precisely describe keratins - the principal structural proteins of skin cells - and identify diseases caused by mutations in the keratin gene.
VOA: standard.2010.03.29
It was the first place where the concept of stem cells was developed, in that if one looks carefully one can find immature cells in the bone marrow.
这是干细胞概念的发祥地,如果仔细观察造血系统,就能找到骨髓中的未成熟细胞
Because HIV is an RNA virus and if it enters your cell the only way it can replicate, it can put its DNA into your cells, is by first making DNA out of its RNA genome.
因为HIV是RNA病毒,如果它进入你的细胞,它复制自己的唯一方式,它能把自己的DNA转入你的细胞,方法是先用自己的,RNA基因组制造出DNA
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