雌ラットのカルシウム,リンおよびマグネシウム出納に及ぼす飼料中タンパク質の影響

概要

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The experiment was carrid out to observe the effect of dietary protein quantity and its quality on calcium (Ca), phosphorus (P) and magnesium (Mg) balance in female rats. Diets for each 5 experimental groups were 20% and 40% protein levels respectively. Milk casein, soy protein isolate and wheat gluten were used as a protein source. Female fisher-strain rats of 4 weeks of age were divided into groups of 20% casein diet (C-20), 40% casein diet (C-40), 40% soy protein isolated diet (S-40),20% wheat gluten diet (G-20) and 40% wheat gluten diet (G-40) and effects of the diets on Ca, P and Mg balance were observed for 13 weeks. To each diets, first limiting amino acid was added. During the experimental periods, 1st, 5th and 13th weeks, Ca, P and Mg balance was determined. The results are as follow : 1. Body weight gain and food intake were not significantly different between the diets. 2. Absorption rate of Ca, P and Mg decreased with age. 3. Forty percent protein diets always indicated higher urinary Ca excretion compared to 20% protein diets. In addition, urinary Ca levels were higher in order G-40, C-40 and S-40. 4. Retention rate of Ca, P and Mg also decreased with age. The highest Ca retention was observed on C-40 diet and the lowest was G-40 diets.
東京聖栄大学の論文
1987-12-20