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분류 전체보기에 해당되는 글 4529건
- 2012.10.08 (CNN 학습용 10분 뉴스) CNN Student News / 2012-10-8
- 2012.10.08 [영어뉴스] NPR 5분 뉴스 / 2012-10-8
- 2012.10.05 [이코노미스트지/이슈동영상] 2012-10-5
- 2012.10.05 [블룸버그 라디오 경제뉴스심층분석(15분)] Bloomberg - On the Economy / 2012-10-5
- 2012.10.05 [블룸버그 라디오 최근경제뉴스(5분)] Bloomberg - The First Word / 2012-10-5
- 2012.10.05 [오바마-롬니/대선후보 1차토론 전체방송 (1시간31분)] Romney and Obama Focus on Policy Details in First Debate
- 2012.10.05 [PBS 최신뉴스 동영상(53분)] 2012-10-5
- 2012.10.05 [오디오/WSJ 최근국제경제동향(35분)] The Wall Street Journal 'This Morning' / 2012-10-5
- 2012.10.05 [ABC News 동영상/대선후보토론이 여론의 흐름을 바꿀것인가] Will the Presidential Debate Change Poll Numbers?
- 2012.10.05 (CNN 학습용 10분 뉴스) CNN Student News / 2012-10-5
- 2012.10.05 [영어뉴스] NPR 5분 뉴스 / 2012-10-5
- 2012.10.05 [NPR 특집 (오디오+대본)/쥐의 줄기세포에서 수정란 생성] Scientists Create Fertile Eggs From Mouse Stem Cells 4
- 2012.10.05 [오바마:롬니/대선후보 1차토론 주요부분] Obama vs. Romney: The First Debate
- 2012.10.04 [레이건대통령 영국의회연설(동영상+대본)/34분] Ronald Reagan_Address to the British Parliament (June 8, 1982)
- 2012.10.04 [The Economist /이슈동영상] 2012-10-4
- 2012.10.04 [블룸버그 라디오 경제뉴스심층분석(16분)] Bloomberg - On the Economy / 2012-10-4
- 2012.10.04 [블룸버그 라디오 최근경제뉴스(5분)] Bloomberg - The First Word / 2012-10-4
- 2012.10.04 [PBS 최신뉴스 동영상(20분)] PBS NewsHour (2012-10-4)
- 2012.10.04 [오디오/WSJ 최근국제경제동향(35분)] The Wall Street Journal 'This Morning' (2012-10-4)
- 2012.10.04 (CNN 학습용 10분 뉴스) CNN Student News Transcript / 2012-10-4
- 2012.10.04 [영어뉴스] NPR 5분 뉴스 / 2012-10-4
- 2012.09.28 [영어 오디오북+대본 (무삭제 원본)] 제인 에어(Jane Eyre) Chapters 1~38 (장별 듣기)
- 2012.09.28 [만화 영어회화] He spoke too soon!
- 2012.09.28 [클린턴 대통령, 고 로버트 케네디 상원의원 추모미사 연설 (동영상+대본)/9분] Bill Clinton_Speech at the 25th Anniversary Memorial Mass for Robert F. Kennedy (June 6, 1993)
- 2012.09.28 [포라 TV 유명인사 미국대선관련 강연 동영상] Frank Rich & Chris Hughes: Mixing Media, Tech & Politics
- 2012.09.28 [The Economist 이슈 심층분석 (10분)] Special Report : India
- 2012.09.28 [PBS 최신뉴스 동영상(20분)] PBS NewsHour (2012-9-28)
- 2012.09.28 [블룸버그 라디오 경제뉴스심층분석(15분)] Bloomberg - On the Economy / 2012-9-28
- 2012.09.28 [블룸버그 라디오 최근경제뉴스(5분)] Bloomberg - The First Word / 2012-9-28
- 2012.09.28 [오디오/WSJ 최근국제경제동향(35분)] The Wall Street Journal 'This Morning' (2012-9-28)
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(CNN 학습용 10분 뉴스) CNN Student News / 2012-10-8
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[블룸버그 라디오 경제뉴스심층분석(15분)] Bloomberg - On the Economy / 2012-10-5
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[블룸버그 라디오 최근경제뉴스(5분)] Bloomberg - The First Word / 2012-10-5
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[오바마-롬니/대선후보 1차토론 전체방송 (1시간31분)] Romney and Obama Focus on Policy Details in First Debate
Watch Romney and Obama Focus on Policy Details in First Debate on PBS. See more from PBS NewsHour.
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[PBS 최신뉴스 동영상(53분)] 2012-10-5
Watch Wednesday, October 3, 2012 on PBS. See more from PBS NewsHour.
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[오디오/WSJ 최근국제경제동향(35분)] The Wall Street Journal 'This Morning' / 2012-10-5
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(CNN 학습용 10분 뉴스) CNN Student News / 2012-10-5
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[NPR 특집 (오디오+대본)/쥐의 줄기세포에서 수정란 생성] Scientists Create Fertile Eggs From Mouse Stem Cells
[NPR 특집/쥐의 줄기세포에서 수정란 생성] Scientists Create Fertile Eggs From Mouse Stem Cells
Each of these mouse pups was born from an egg scientists created using embryonic stem cells. It's possible the technology could change future treatment for human infertility.
Scientists in Japan report they have created eggs from stem cells in a mammal for the first time. And the researchers went on to breed healthy offspring from the eggs they created.
While the experiments involved mice, the work is being met with excitement — and questions — about doing the same thing for humans someday.
"Wow. That's my general reaction," said Hank Greely, a bioethicist at Stanford University who studies stem-cell science. "Repairing hearts, repairing brains, repairing kidneys, that's all good and important, and we'd all love to be able to do that. But this involves making the next generation."
Scientists obtain the versatile cells from embryos. Embryonic stem cells are controversial because researchers destroy the embryos to get them.
But because these stem cells can morph into any cell in the body, there's always been the possibility they could do something especially profound. They could offer a way to create eggs from anyone at any age. That could change how humans reproduce.
In this week's issue of the journal Science, Mitinori Saitou and colleagues at Kyoto University in Japan report they finally achieved that elusive goal.
"This is actually the first time to make eggs from embryonic stem cells and then produce eggs [that] become healthy offspring," Saitou said.
Moreover, Saitou's team did something potentially even more astonishing: They bred healthy mice from eggs made from another type of stem cell known as induced pluripotent stem cells.
These are cells that look essentially identical to embryonic stem cells. But instead of coming from embryos, they can be made from adult cells, such as skin or blood cells. So they don't have any of the ethical baggage of embryonic cells.
"They're gotten to what was our Holy Grail, which is making eggs," said George Daly, a leading stem-cell scientist at Harvard. "It's like cellular alchemy. I mean, they can turn lead into gold here. They can turn skin cells or blood cells into eggs."
The big question, of course, is whether anyone could do the same thing for people. No one knows for sure. And it would surely take a ton of work.
But John Gearhart, a stem-cell pioneer at the University of Pennsylvania, says mice are close enough to humans to think it's probably doable. "I think this will be worked out in time. I don't have any doubt about it," Gearhart said.
And if he's right, then, at the very least, it would be a huge advance for women who are infertile for medical reasons or who have postponed having babies too long.
"If we can make eggs from stem cells, then the biological clock isn't ticking so much for women," Stanford's Greely said.
But that could be just the beginning. The same team previously made sperm from stem cells. So, for example, the power to create sperm or eggs for anyone would be big news to many gay men and lesbians.
And Greely goes even further into territory charted by the book Brave New World. Combined with other techniques, eggs from stem cells could some day make it much easier for parents to pick babies with blue eyes or blond hair, or a talent for sports or music.
Speculation about the possibilities get even more sci-fi. "Any skin cell that you can find on the edge of a coffee cup theoretically could be induced back to being an egg, and a baby could be produced," said Ronald Green, a bioethicist at Dartmouth University.
"When you think about the commercial possibilities of people selling to infertile people babies produced from George Clooney or Jennifer Aniston, or whatever, you have to worry about it," Green said.
Now, it's important to remember that this may end up being nothing more than speculation. And even if it does prove possible, choices like these are probably decades away.
Even so, David Prentice of the Family Research Council says such research "cheapens all life in a way, not just embryonic or fetal life, but babies and the rest of us when we starting treating life as a manufacturing proposition."
But just the possibility is already stirring intense debate about where the power to use stem cells to make eggs might take us. "It's like any other technology," said Daniel Sulmasy, a professor of medicine and ethics at the University of Chicago. "Whatever we've done in human kind — whether it's discovering fire or creating the wheel — you can use these things to do lots of good and you can use them immoral ways," he says.
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[오바마:롬니/대선후보 1차토론 주요부분] Obama vs. Romney: The First Debate
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Reagan_Address to the British Parliament (June 8, 1982).txt글
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[블룸버그 라디오 경제뉴스심층분석(16분)] Bloomberg - On the Economy / 2012-10-4
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[블룸버그 라디오 최근경제뉴스(5분)] Bloomberg - The First Word / 2012-10-4
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[PBS 최신뉴스 동영상(20분)] PBS NewsHour (2012-10-4)
Watch Tuesday, October 2, 2012 on PBS. See more from PBS NewsHour.
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[오디오/WSJ 최근국제경제동향(35분)] The Wall Street Journal 'This Morning' (2012-10-4)
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(CNN 학습용 10분 뉴스) CNN Student News Transcript / 2012-10-4
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[영어 오디오북+대본 (무삭제 원본)] 제인 에어(Jane Eyre) Chapters 1~38 (장별 듣기)
Chapter I
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Chapter II
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Chapter III
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Chapter IV
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Chapter V
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Chapter VI
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Chapter VII
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Chapter VIII
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jane-eyre-009-chapter-viii.pdf
Chapter IX
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Chapter X
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Chapter XI
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Chapter XII
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Chapter XIII
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jane-eyre-014-chapter-xiii.pdf
Chapter XIV
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Chapter XV
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Chapter XVI
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Chapter XVII
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jane-eyre-018-chapter-xvii.pdf
Chapter XVIII
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jane-eyre-019-chapter-xviii.pdf
Chapter XIX
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Chapter XX
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Chapter XXI
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Chapter XXII
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jane-eyre-023-chapter-xxii.pdf
Chapter XXIII
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jane-eyre-024-chapter-xxiii.pdf
Chapter XXIV
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jane-eyre-025-chapter-xxiv.pdf
Chapter XXV
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Chapter XXVI
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jane-eyre-027-chapter-xxvi.pdf
Chapter XXVII
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jane-eyre-028-chapter-xxvii.pdf
Chapter XXVIII
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jane-eyre-029-chapter-xxviii.pdf
Chapter XXIX
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jane-eyre-030-chapter-xxix.pdf
Chapter XXX
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Chapter XXXI
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jane-eyre-032-chapter-xxxi.pdf
Chapter XXXII
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jane-eyre-033-chapter-xxxii.pdf
Chapter XXXIII
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jane-eyre-034-chapter-xxxiii.pdf
Chapter XXXIV
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jane-eyre-035-chapter-xxxiv.pdf
Chapter XXXV
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jane-eyre-036-chapter-xxxv.pdf
Chapter XXXVI
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jane-eyre-037-chapter-xxxvi.pdf
Chapter XXXVII
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jane-eyre-038-chapter-xxxvii.pdf
Chapter XXXVIII
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jane-eyre-039-chapter-xxxviii.pdf
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[클린턴 대통령, 고 로버트 케네디 상원의원 추모미사 연설 (동영상+대본)/9분] Bill Clinton_Speech at the 25th Anniversary Memorial Mass for Robert F. Kennedy (June 6, 1993)
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[The Economist 이슈 심층분석 (10분)] Special Report : India
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[PBS 최신뉴스 동영상(20분)] PBS NewsHour (2012-9-28)
Watch Wednesday, September 26, 2012 on PBS. See more from PBS NewsHour.
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[블룸버그 라디오 경제뉴스심층분석(15분)] Bloomberg - On the Economy / 2012-9-28
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[블룸버그 라디오 최근경제뉴스(5분)] Bloomberg - The First Word / 2012-9-28
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[오디오/WSJ 최근국제경제동향(35분)] The Wall Street Journal 'This Morning' (2012-9-28)
