OXYGEN AVAILABILITY AND GROWTH OF THE CHICK-EMBRYO
OXYGEN AVAILABILITY AND GROWTH OF THE CHICK-EMBRYO
复制标题
DOI：
10.1016/0034-5687(81)90091-8
复制
发表时间：
1981-01-01
期刊：
影响因子：
--
通讯作者：
WELCH, JE
中科院分区：
文献类型：
--
作者：
METCALFE, J;MCCUTCHEON, IE;WELCH, JE
使用在 50% 湿度、38 摄氏度下孵化的白来航鸡蛋进行了两个实验。 C 和平均气压 747 托。在一项实验中，实验组中的鸡蛋各半覆盖着氯丁橡胶膜，从而减少了扩散能力。 20%，并在 21% O2 中孵育。在第二个实验中，实验蛋在 60% O2 中孵化（不加盖）。在每项研究中，对照蛋与实验蛋同时在 21% O2 中孵化（无遮盖）。所有 3 组的蛋表面积（根据新产蛋的重量计算）和 18 天时胚胎重量之间的关系均得到证实。当进行各组之间的比较时，发现半覆盖的鸡蛋的胚胎生长显着延迟；在 60% O2 中孵化的鸡蛋胚胎在 18 天时明显比在空气中孵化的对照鸡蛋重。通过在 60% O2 中孵化卵子可以加速胚胎生长，这一事实表明，离开绒毛尿囊毛细血管的血液中的 O2 张力通常会限制该物种孵化前 18 天的胚胎生长速度。
Two experiments were performed using White Leghorn eggs incubated in 50% humidity, at 38.degree. C and an average barometric pressure of 747 torr. In 1 experiment eggs in the experimental group were each half covered with a neoprene membrane, reducing the diffusing capacity by .apprx. 20%, and incubated in 21% O2. In the 2nd experiment the experimental eggs were incubated (uncovered) in 60% O2. Control eggs were incubated (uncovered) in 21% O2 simultaneously with the experimental eggs in each study. A relationship between egg surface area (calculated from weight of the freshly laid egg) and embryo weight at 18 days was confirmed for all 3 groups. When comparisons were made among the groups, there was significant retardation of embryonic growth in the half-covered eggs; embryos from eggs incubated in 60% O2 were significantly heavier at 18 days than control eggs incubated in air. The fact that embryo growth can be accelerated by incubation of the egg in 60% O2 suggests that the O2 tension in blood leaving the chorioallantoic capillaries normally limits the rate of embryonic growth for the first 18 days of incubation in this species.