| タイトル | Avian embryonic development in hyperdynamic environments |
| 本文（外部サイト） | http://hdl.handle.net/2060/19840010817 |
| 著者（英） | Abbott, U. K.; Smith, A. H. |
| 著者所属（英） | California Univ. |
| 発行日 | 1983-01-01 |
| 言語 | eng |
| 内容記述 | Embryos which developed for 24 hours in the oviduct of hens maintained at 2 G and which were subsequently incubated at Earth gravity had a 14% reduction in hatchability. Increased mortality during the first 4 days, and an increase in embryonic abnormalities were of the types usually found during the first mortality peak (2-3 days). Embryos in eggs that were produced at Earth gravity and continued their development on the centrifuge at fields of 2 G or less did not appear to be greatly affected by the treatment. At 4 G, 91% of the embryos died, mostly on the first and second days of incubation. Abnormalities prominent in the centrifuged eggs include: (a) a failure of the primitive streak to develop; (b) interference with the development of the axial skeleton; (c) multiple hemorrhages, mostly petechial which is consistent with capillary fragility; and (d) retardation of embryo growth, possibly caused by an interference with gaseous diffusion, the result of an acceleration-induced increase in gas density in the centrifuging incubator. |
| NASA分類 | LIFE SCIENCES (GENERAL) |
| レポートNO | 84N18885
NAS 1.26:173339
NASA-CR-173339 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/160171 |
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