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Combining various imaging techniques, an interdisciplinary team of scientists in Europe have developed a way to visualize and quantify early embryogenesis in zebrafish, according to a study published this week in Science. "We want to turn all the verbal descriptions of biology into something that's going to be quantitative and formal," said embryologist and coauthor Nadine Peyriéras of the National Centre for Scientific Research (CNRS) in France. "We've been largely unable so far to do that." The team used two imaging techniques that take advantage of the fact that signals are emitted when lasers interact with living tissues. One type of light emission, known as the third harmonic generation, provides information about the contours of the cell. The second harmonic generation, in contrast, provides information about mitotic spindles. Together, these two signals yielded a three dimensional view of developing zebrafish embryos, a model organism of vertebrate embryogenesis, allowing the researchers to measure cell size and shape and track cell lineage throughout the first 10 cell divisions. As the researchers watched the embryos grow from single cells into the 1,000-cell stage, they learned that early embryogenesis is not nearly as synchronous or predictable as was believed. "Asynchrony is the rule, and asymmetry is the rule," [세로가 2개로 나누어질때의 상황은 비동시성,좌우비대칭성의 법칙을 보인다.]Peyriéras said. As early as the two-cell stage, "division is not synchronous, and cell volume is not the same either." [분열은 비동시성이고 세포부피는 서로다르다]These fluctuations result in a pattern of "pseudowaves," [의사파도]she said -- giving "the visual impression of the propagation of a wave." [일파만파의 시각적 인상을 준다] THG imaging the zebrafish embryo from the one-cell stage Courtesy of N. Olivier, et al. Membrane dynamics and vesicular trafficking at the yolk blastoderm interface Courtesy of N. Olivier, et al. THG/SHG 4D imaging of the zebrafish embryo cleavage stages Courtesy of N. Olivier, et al. Conformal THG/SHG 4D imaging of the zebrafish embryo cleavage stages Courtesy of N. Olivier, et al. |
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삭제된 댓글 입니다.
내가 본래면목인가? 저는 법지이고요.. 남들이 아직은 사람이라 카든데요..
일체가 한 마음이니 도인들은 술도 같은시각에 취하나 봅니다.
저도 좀 늦었지만 일잔하고 뒤척이며 7자식8자식 낳을렵니다.
내가 있가 전에
언제 어디 한 순간 한 곳이라도 문제가 있었던가?
내가 있고 나서
언제 어디 한 순간 한 곳이라도 문제가 없었던가?
"내가 그럼 제브라피쉬인가?"하고 따지는 이 누구인가?
가카조또로구나... ㅎㅎㅎ
(죄송합니다. 법지성님... 저도 취해서요. ^^;)