Those taken from days-old embryos, called embryonic stem cells, are the most malleable and can produce all of the cell types.

从几天大的胚胎中获取的这些细胞叫作胚胎干细胞，是最有分化性的，能分化成各种细胞类型。

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So the scientists in this study, employing a pharmacological treatment over 40 days, seeded feeder cells with human embryonic stem cells.

因此，科学家们在这项研究中，采用超过40天的药物处理，用人类胚胎干细胞种植饲养细胞。

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In vitro culture of corneal epithelium of 10 days chick embryonic eyes showed that a prominent effect of cells proliferation induced by epidermal growth factor (EGF) of mouse.

鸡胚角膜上皮组织离体培养试验表明，小鼠表皮生长因子对10日龄鸡胚角膜上皮组织有显著的增殖效应。

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Notable losers in May included BioTime, a regenerative medicine firm run by Michael West, who was one of the key figures in the early days of embryonic stem cell research, and Cytori Therapeutics, which is trying to commercialize stem cells found in fat for breast reconstruction and other uses.

FORBES: Biotech Busts And Breakthroughs In May

Obama's order directs the NIH to develop revised guidelines on federal funding for embryonic stem cell research within 120 days, according to Dr. Harold Varmus, president of Memorial Sloan-Kettering Cancer Center and co-chairman of Obama's science advisory council.

CNN: Obama overturns Bush policy on stem cells

After several days, the ball of cells that results contains a blanket of embryonic stem cells endowed with the genetic material of the donor skin cell, which have the ability to generate every cell type from that donor.

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