时间:2019-01-08 作者:英语课 分类:Scientific American(十一)月


英语课

    This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute?

   

    One of the dreams of biomedical scientists is to be able to transform adult cells into other kinds of cells. And thus avoid some of the ethical 1 concerns of working with embryonic 2 stem cells. Now a research team from McMaster University in Ontario has announced that they've been able to transform human skin cells into blood cells. The work was published online on November 7th by the journal Nature.

   

    Other research in this area has required that cells of one type first be returned to a more generally undifferentiated stem cell state, which can introduce fresh problems. Once there, the cell is then turned into the type of tissue the researchers seek. But in this case, the scientists avoided the middleman cell. The skin was changed directly into what appears to be functional 4 adult human blood cells. The technique involves gene 3 insertion by a virus vector and exposure to numerous regulatory proteins.

   

    The cells have not been tested in humans to see if they're truly indistinguishable from the home-grown kind. But the research is another step in the effort to create needed cell types from easily available ones.

   

    Thanks for the minute. For Scientific American's 60-Second Science, I'm Steve Mirsky.



adj.伦理的,道德的,合乎道德的
  • It is necessary to get the youth to have a high ethical concept.必须使青年具有高度的道德观念。
  • It was a debate which aroused fervent ethical arguments.那是一场引发强烈的伦理道德争论的辩论。
adj.胚胎的
  • It is still in an embryonic stage.它还处于萌芽阶段。
  • The plan,as yet,only exists in embryonic form.这个计划迄今为止还只是在酝酿之中。
n.遗传因子,基因
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
adj.为实用而设计的,具备功能的,起作用的
  • The telephone was out of order,but is functional now.电话刚才坏了,但现在可以用了。
  • The furniture is not fancy,just functional.这些家具不是摆着好看的,只是为了实用。
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absorber coupling
actuator
ADC, A/D converter
additional post
aladan
amphoric resonance
Anemone demissa
aplosyenite
audience rating
biomass liquefaction
blunt nosed body
brachionus forficula
color television
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cyclone separation
damaged Thoroughfare and Conception Vessels
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Franklin Institute
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go into liquidation
half solid floor
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height of high tide
hexacontane
hexahydro-salicylic acid
hornotine
hot-driven rivet
houda
interrogative sentences
Introdouche
lapilli mound
library-user
lobular glomerulonephritis
long list
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methylcholanthrenes
net of canals and ditches
new political economy of development
nitrification inhibitor
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Peltovuoma
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pressure and vacuum release valve
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record of cash disbursement
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right circular cylinder coordinate
rough board
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self-consciously
Senekjie's medium
serenader
shoot craps
sideways extrusion
sing the praises of sb
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sinoradimella costata
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Solvay, Ernest
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strata mucosum membranae tympani
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tax on slaughtering animals
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trimoxamine
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univorous
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upper Ordovician series
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UTRR (University of Teheran Research Reactor)
vajazzles
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view-finder
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vincis
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xerosis of conjunctiva
zanthoxyli pericarpium