Sentences with phrase «from young embryos»

In the early 1950s, Robert Briggs and Thomas King repeated Spemann's experiments using a species of leopard frog, Rana pipiens, first with a nucleus from young embryos (Briggs and King, 1952) then from older embryos (King and Briggs, 1954); both the younger and older implanted nuclei could still be reprogrammed by the enucleated host cell.

This definition excludes stem cells that are cultivated from younger embryos that have yet to reach the 70 - 100 cell blastocyst stage.

Not exact matches

In humans, the unborn young from the end of the eighth week after conception to the moment of birth, as distinguished from the earlier embryo.

But when Joris Vermeesch from the Centre for Human Genetics in Leuven, Belgium, and colleagues examined 23 embryos from nine young, fertile couples who were undergoing IVF for screening purposes, they found that 21 had chromosomal abnormalities, suggesting these are in fact the norm (Nature Medicine, DOI: 10.1038 / nm.1924).

Satellites have detected intense x-rays blazing from the youngest stellar embryo yet seen, an object perhaps 10,000 years old.

Researchers treated mahi - mahi embryos and young fish with oil collected from near the damaged wellhead and from the gulf's surface.

Stem cells plucked from embryos were deemed extremely young by the clock, while neural cells from centenarians were estimated to be about 100.

Further experiments with eggs from Panama showed that embryos as young as 4 days old could accomplish the same feat.

In addition to the seeds that contain the plant embryo, they collected leaves from young and mature Parkia trees in the home range of tamarins.

The process was tested on 18 lab - created embryos using sperm from the male donor and eggs donated by 12 healthy young women, the study said.