期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1978
卷号：75
期号：7
页码：3417-3421
DOI：10.1073/pnas.75.7.3417
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：We measured alveolar surface tension directly by observing the spreading properties of fluid droplets placed by micropipette within individual alveoli. Alveolar surface tension in excised rat lungs at total lung capacity and 37 degrees was 29.7 +/- 1.4 mN-m-1. In lungs held at functional residual capacity, surface tension changed slowly, rising to 9 mN-m-1 at 30 min with a subsequent approximately linear rise to 16 mN-m-1 at 115 min. Thereafter it rose more rapidly (20 mN-m-1 at 140 min), suggesting that it was not asymptotically approaching an equilibrium value.
