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He developed what he calls a suicide molecule that acts like the protein which tells cells to self-destruct.
VOA: special.2010.03.16
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What I want you to remember is that specific sub-populations of cells get activated, the activation results in a specific response.
我希望你们记住的是,一些特定的细胞亚群受到刺激时,被激活细胞将引起特定的应答
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This process is called self-renewal, so that's one important process of property stem cells, that they're capable of self-renewal.
这种过程称为自我更新,所以这是干细胞的一个重要性质,它们能够自我更新
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They used light-sensitive molecules to turn on and off nerve cells in the deep brain structure of mice.
VOA: special.2009.04.07
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This was a huge number for me up until 2 weeks ago Besides the 100 billion neurons in the brain . there are 12-15 thousand cochlear hair cells.
直到两周前，这对我来说还是个庞大的数字,除了这一兆亿个神经元外,还有12，000到15，000个毛细胞。
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They hope that future synthetic cells can make useful bacteria for products like bio-fuels or vaccines, and to clean up polluted water.
VOA: special.2010.07.20
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Retroviruses, for example, can only insert - can only transduce and express their DNA in cells that are dividing.
就以逆转录病毒为例,它们只能在分裂阶段的细胞里,转导并表达自己的基因
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Research published mainly in nineteen seventy-three had found proteins on the surfaces of nerve cells in the brain.
VOA: special.2010.05.04
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Now, you know, because we talked about cell culture already, that a great--that we talked about last week, manufacturing of cells.
你知道,因为我们已经讲过细胞培养,我们上周讲过的,细胞的大规模制造
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Doctor Kakarala says the cancer-fighting treatments known as chemotherapy do not control tumors containing cancer stem cells.
VOA: special.2010.06.01
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Those are called embryonic stem cells, they are self-renewing, and they are pluripotent, meaning they have many potencies.
这些称为胚胎干细胞,它们可以自我更新,且是多能干细胞,即它们有多种潜能
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We coat the outside with these muscle cells. We place it back into this oven-like device.
VOA: special.2010.10.19
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Individual cells of the pancreas are capable of - of a healthy pancreas are capable of both sensing glucose and secreting insulin.
每一个健康胰腺细胞,都可以感知血液中葡萄糖浓度,并分泌胰岛素
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Human genes are normally organized along forty-six chromosomes in our cells, twenty-three from each parent.
VOA: special.2009.09.09
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It turns out that the kinds of post-translational modifications human cells are able to do are very complicated.
研究结果证实人类细胞所能完成的,翻译后修饰非常复杂
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He heads the first-ever clinical trial of umbilical cord stem cells with cerebral palsy patients.
VOA: special.2011.02.01
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That's one way of thinking why animal cells have cells from animals and humans have sub-cellular compartments.
这就不难想见,为什么动物细胞,包括,人类细胞有亚细胞结构区域了
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She says the picorna-like viruses seize control of the ribosome in cells.
VOA: special.2009.09.22
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We talked last time about extracellular matrix and this complex protein-carbohydrate gel that surrounds all cells.
我们上次谈到过的细胞外基质,是一种蛋白和碳水化合物的复合物胶冻,它环绕在细胞周围
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It acts like the protein that directs cells to self-destruct.
VOA: special.2010.05.19
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An example is production of certain molecules called cytokines by T-cells that activate themselves.
细胞能分泌这类叫做细胞因子的分子,实现自激活
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TGF-beta can both heal wounds and make healthy cells cancerous.
VOA: special.2010.05.18
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They can insert genes into non-dividing cells and cause those genes to be expressed.
它使基因导入没有分裂的细胞,并使其表达
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She says the picorna-like viruses "hijack" the ribosome in cells.
VOA: special.2009.09.15
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During development of the embryo it goes from being a single cell, the fertilized egg, to being a multi-cellular organism with billions of cells in it.
胚胎的发育,始于一个单一细胞,即受精卵,直到形成一个以十亿计数量的细胞构成的,多细胞有机体
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They examined DNA-methylation in the white blood cells.
VOA: special.2009.11.24
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We talk about cells as being kind of the fundamental unit of humans and other multi-cellular organisms.
我们某种意义上把细胞视为,人体和其它多细胞生物的基本单位
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In order to attract the rabbit's own stem cells to re-grow the cartilage, channels in the scaffold were filled with a growth factor protein.
VOA: standard.2010.08.11
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So far our ability to de-differentiate cells or find out how to do that is limited.
迄今为止,我们令细胞去分化的能力,和技术方法还相当有限
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You can do many post-translational modifications; your cells are capable of doing many post-translational modifications.
你能完成很多种类的翻译后修饰,你的细胞能完成很多种类的,翻译后修饰
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