文献检索，用中文搜 PubMed

Suppr 超能文献

核心技术专利：CN118964589B侵权必究

核心技术专利：CN118964589B侵权必究

Tazawa H, Okuda A, Nakazawa S, Whittow G C

Department of Electronic Engineering, Muroran Institute of Technology, Japan.

Comp Biochem Physiol A Comp Physiol. 1989;92(4):613-7. doi: 10.1016/0300-9629(89)90376-9.

Chicken embryos aged 12, 16, 18 and 20 (externally pipped) days of incubation were exposed to graded reductions (2 degrees C) in ambient temperature from 38 to 28 degrees C, exposure to each temperature lasting up to 9 hr. 2. Oxygen uptake was measured first at 38 degrees C and then in the quasi-equilibrium state at lowered temperatures. The temperature coefficient (Q10) was calculated for each egg. 3. For mild cooling (32 degrees C), the Q10 in 18-day-old embryos was about 1.5, while 12- and 16-day-old embryos had a Q10 value of about 2, indicating that a feeble homeothermic metabolic response to cooling appears in late prenatal embryos. It became more marked in externally pipped embryos and further augmented in hatchlings.

将孵化12、16、18和20天（已破壳外露）的鸡胚暴露于环境温度从38℃分级降低（2℃）至28℃的环境中，每个温度暴露长达9小时。2. 首先在38℃下测量氧气摄取量，然后在较低温度下的准平衡状态下测量。计算每个鸡蛋的温度系数（Q10）。3. 对于轻度冷却（32℃），18日龄胚胎的Q10约为1.5，而12和16日龄胚胎的Q10值约为2，这表明产前后期胚胎对冷却出现微弱的体温调节代谢反应。在已破壳外露的胚胎中这种反应变得更加明显，在雏鸡中进一步增强。

Tazawa H, Okuda A, Nakazawa S, Whittow G C

Department of Electronic Engineering, Muroran Institute of Technology, Japan.

Comp Biochem Physiol A Comp Physiol. 1989;92(4):613-7. doi: 10.1016/0300-9629(89)90376-9.

Chicken embryos aged 12, 16, 18 and 20 (externally pipped) days of incubation were exposed to graded reductions (2 degrees C) in ambient temperature from 38 to 28 degrees C, exposure to each temperature lasting up to 9 hr. 2. Oxygen uptake was measured first at 38 degrees C and then in the quasi-equilibrium state at lowered temperatures. The temperature coefficient (Q10) was calculated for each egg. 3. For mild cooling (32 degrees C), the Q10 in 18-day-old embryos was about 1.5, while 12- and 16-day-old embryos had a Q10 value of about 2, indicating that a feeble homeothermic metabolic response to cooling appears in late prenatal embryos. It became more marked in externally pipped embryos and further augmented in hatchlings.

将孵化12、16、18和20天（已破壳外露）的鸡胚暴露于环境温度从38℃分级降低（2℃）至28℃的环境中，每个温度暴露长达9小时。2. 首先在38℃下测量氧气摄取量，然后在较低温度下的准平衡状态下测量。计算每个鸡蛋的温度系数（Q10）。3. 对于轻度冷却（32℃），18日龄胚胎的Q10约为1.5，而12和16日龄胚胎的Q10值约为2，这表明产前后期胚胎对冷却出现微弱的体温调节代谢反应。在已破壳外露的胚胎中这种反应变得更加明显，在雏鸡中进一步增强。