学童におけるマンガン代謝

機関リポジトリ Web Site

書誌事項

タイトル別名
  • ガクドウ ニオケル マンガン タイシャ
  • MANGANESE METABOLISM OF SCHOOL CHILDREN

この論文をさがす

抄録

学童について短期間Mn平衡をしらべた。平衡の平均は殆んど零であるが, そのバラツキは相当大きく, またMnの排泄が殆んど糞中から行われるので, 必要量についてはくわしく考察を行わなかつた。尚糞便中水溶性Mnは10%内外であつた。またこのMn平衡実験の参考として, 白鼠及び犬を使って低MD食の影響をみたが, ここで用いた生後約2ヶ月位のねずみにおいては表面上何等影響がみられず, 唯肝臓中のMn及び脂肪量が異なるだけであつた。犬においては低Mn食を与え続けたところ, ある程度の期間をすぎると平衡が負から正に変化した。また低Mn食餌を与えられた犬は通常の食餌の犬に比べて肝臓中Mnの量が著しく低下していた。低栄養に対する生体の適応性, 表面上現われない障害などの事実を綜合して考えると, 学童のMn摂取量が適当かどうかということは更に検討を要する。

The manganese balance experiments have been studied by children. Eighteen boys and fifteen girls, all normal school children, six to thirteen years old, were subjecteal to the experiments. Table 2 shows their manganese intakes, excretions in feces, and balances on natural foods. There results show that average value of excreted manganese has been as much as intaked. Another two experiments were studied. One, manganese deficiented diets were supplemented to about 100 g body weight albino rats. They had been served 0.06 mg manganese per rat per day through 56 days. Composition of experimental diets were shown in table l. The growth curves of animals and experimental results were shown in figure 1 and table 3. In the other experiment 2 dogs were used. They were served every day low manganese diet, which contains about 1 mg of manganese, and deterniined the excreted manganese in feces. Their manganese balances were shown in figure 2. It is difficult that manganese requirments of animls have been shown, because excreted manganese was found almost from feces on human and animals (6, 12, 13). Therefore, we can not decided that the manganese intake of their children was deficient or sufficient.

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ