p pa pb pc pd pe pf pg ph pi pk pl pm pn po pp pr ps pt pu pv pw px py

Перевод: polarizing

[прилагательное]
поляризующий;
[существительное]
поляризация

Тезаурус:

1. We devised a test for this model - and it is just a model - by trying to weaken the signal from the grafted polarizing region.
2. This signal, we believe, is a diffusing chemical, a morphogen, which is released by the polarizing region, so the concentration is highest at the posterior margin and the concentration decreases away from the polarizing region, being lowest at the anterior margin.
3. The polarizing region thus has properties similar to that of the amphibian organizer.
4. Grafting an additional polarizing region into the anterior margin has done two things - the limb bud has widened and the polarizing region has re-specified the position of the cells in the anterior part of the limb so that they form additional digits.
5. When we add another polarizing region to the anterior margin there are now two sources of the chemical and a U-shaped gradient in the chemical is established, resulting in the embryo's limb having a pattern of digits 4, 3, 2, 2, 3, 4.
6. We weakened the signal in several ways, one of which was by damaging the cells of the polarizing region with high doses of X-rays before grafting it to the anterior margin.
7. The host limb now has two polarizing regions and develops a second set of digits which are a mirror image of the normal ones.
8. A hole is made in the shell and a small cube of cells is carefully cut out from the posterior margin containing the polarizing region and grafted into the anterior margin of the limb bud of another embryo.
9. Our model proposes that the polarizing region normally provides a positional signal along the antero-posterior axis.
10. Mirror-image embryonic chick limb after graft of a polarizing region
11. At the posterior margin of the chick limb bud there is a small group of cells known as the polarizing region.