扩散在禽蛋气体交换中的作用。

Role of diffusion in gas exchange of the avian egg.

作者信息

Rahn H, Paganelli C

出版信息

Fed Proc. 1982 Apr;41(6):2134-6.

Abstract

The pore system of the avian eggshell provides a unique exchange surface for the transport of gases. The dimensions of the microscopic pores do not change with time, and gas transport through them is essentially limited to diffusion. According to Fick's law of diffusion, eggshell conductance of a given gas will vary directly with the diffusion coefficient of the gas. This principle is illustrated by monitoring changes in air space CO2 in metabolizing eggs subjected to changes in barometric pressure or to substitutions of He and SF6 for N2 in the ambient atmosphere.

摘要

禽蛋壳的孔隙系统为气体运输提供了一个独特的交换表面。微观孔隙的尺寸不会随时间变化，通过这些孔隙的气体运输基本上仅限于扩散。根据菲克扩散定律，给定气体的蛋壳传导率将与该气体的扩散系数成正比。通过监测代谢中的鸡蛋在气压变化或环境大气中用氦气和六氟化硫替代氮气时气室二氧化碳的变化，可以说明这一原理。