@article{oai:muroran-it.repo.nii.ac.jp:00008108,
 author = {WAKAYAMA,  Hiroshi and 若山, 博司 and 小師, 隆 and KOMORO, Takashi and SUZUKI,  Yukinori and 鈴木, 幸司 and TAZAWA, Hiroshi and 田澤, 皓},
 journal = {室蘭工業大学研究報告. 理工編, Memoirs of the Muroran Institute of Technology. Science and engineering},
 month = {Nov},
 note = {application/pdf, The gas exchange of chicken eggs takes place by molecular diffusion. The diffusion barrier between ambient atmosphere and erythrocyte hemoglobin of the gas exchanger is conveniently divided into two parts by the air cell formed at the blunt end; i.e., outer barrier (mainly the porous eggshell) and inner barrier (the chorioallantoic membrane). In contrast to the alveolar-arterial Po₂ difference in the lungs, the difference of Po₂, between the air cell and the arterialized blood in the allantoic vein (ΔPAo₂ ･Pao₂) is large in chick embryos. In the present study was analyzed the ΔPAo₂ ･Pao₂ with respect to widely altered diffusive conductance of the shell, diffusing capacity of the chorioallantoic membrane and physiological shunt in the allantoic circulation (allantoic shunt). The shell diffusive conductance (Go₂) was altered from the beginning of incubation, and the O₂ consumption (Mo₂) was measured on day 16. The Mo₂ increased hyperbolically with increasing Go₂, reached maximum at control values of Go₂ and decreased with further increasing Go₂. From Go₂ and Mo₂, the air cell Po₂ was determined. The ΔPAo₂ ･Pao₂, was increased in eggs with augmented Go₂ (from about 50 torr in control eggs to 70 torr in conductance-increased eggs). The diffusing capacity and allantoic shunt which produce a given ΔPAo₂ ･Pao₂ were estimated employing a microcomputer performing the Bohr integration procedure so that a calculated Pao₂, agreed with measured Pao₂. The allantoic shunt is not more than 20%; 10% is likely. The diffusing capacity becomes maximum in intact (control) eggs and is decreased at both lowered and augmented Go₂. In control eggs, the resistance of the inner barrier to O₂ diffusion is about 1.7-fold that of the shell which agrees with the previous reports.},
 pages = {31--42},
 title = {Analysis of the air cell gas-arterialized blood Po₂difference of chicken eggs with respect to widely altered shell conductance},
 volume = {37},
 year = {1987},
 yomi = {ワカヤマ, ヒロシ and コモロ, タカシ and スズキ, ユキノリ and タザワ, ヒロシ}
}