• 作者： 黃伯超; 李寧遠
• 作者服務機構： 國立臺灣大學醫學院生化學研究所
• 中文摘要： 第一次以四名雅美族青年（16歲至19歲）為對象，進行32天的實驗，做四次氮平衡實驗，每次進行四天，膳食以甘藷為主（佔總熱量之77～90％，甘藷氮佔總氮量的80％）。四次平均氮攝取量107 mg/kg ，氮平衡結果平均為－0.5 mg/kg的負平衡。血紅素、血球比容、血漿全蛋白、血漿白蛋白濃度均屬正常範圍，但由血漿內游離氨基酸分析結果顯示有蛋白質缺乏的現象。第二次實驗再以兩位雅美族24歲成人，三位青少年16至16.5歲為對象進行，實驗期53天，前半段36天進行四次氮平衡實驗。結果當氮攝取平均108 mg/kg/day，得氮平衡平均值為0.75 mg/kg/day，早餐前血液一般分析結果均屬正常，但血漿游離氨基酸分析結果顯示青少年有蛋白質缺乏症狀，成人不明顯。
• 英文摘要： The protein nutrtion status of young Yami-tribes men of 16 to 19 years of age who werefed with sweet-potato diets for respectively 32and 53 days was examined. A common varietyof sweet-potato (Tainon No. 57) which containsabout 1.0% of protein on wet weight basisprovided 75 to 95% of the total calorie intake.Daily protein intake range from 0.55 g to 0.74g/kg body weight, of which 75% to 85% de-rived from the sweet potato. Hemoglobin,hematocrit and plasma total protein were allwithin normal range. Plasma albumin level ofone subject was at the marginal level. Amongplasma free amino acids, veline was lowere andglycine and alanine were higher than the normalvalues reported, thus indicating inadequateprotein nutrition status. Their fecal specimenswere found not able to fix nitrogen both aer-obically and anaerobically.
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