Abstract
Summary
Ten rats born and maintained in a low pressure, pure oxygen environment did not differ in growth rates from ground level controls. However, overall digestibility was lowered in experimentals. 74.3% vs 79.5% for controls (P<.001), with even greater differences in protein digestibility, 65.5% vs 74.6% (P<.001). Although less fat was digested by experimentals, 75.6% vs 81.4% for controls, these differences were not significant. Net caloric intake was similar due to a slightly greater food intake by experimentals. Calories given off as heat did not differ, suggesting similar metabolic rates.
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