ラツテの発育に及ぼす人唾液の効果に関する研究
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It is a well known fact that thorough chewing of food is favorable for the health. This favorable effect of chewing seems to be due, not only to mastication of food, but to some action of saliva secreted during the chewing. With the object of confirming this supposition, young rats were fed with food mixed with saliva and the growth of them was compared with that of control animals. Young albino rats of the same litters were divided into three groups after breast feeding for ten days after the birth : The first group was fed with rat milk only, the second group with rat milk and powdered cow milk, and the third group with powdered cow milk mixed with human saliva, each for 14 days. On the 25th day the first and the second group were fed with corn mixed with fish meal. But the third group was fed with corn and fish meal mixed with human saliva. After 39th day all three groups were fed with the same food. The saliva used in the experiment was collected from healthy human beings with small tubes devised for the purpose. Three kinds of the saliva were used, (i) the parotid, (ii) the submaxillary and sublingual, (iii) the mixture of the three. The body weight of animals was measured day after day. Taking the body weight on the first experiment day as 100, the subsequent weights were expressed as indexes and compared one another. Graphs depicting these indices show evidently that the growth of the third group fed with the food mixed with the saliva surpassed those of the other two groups. But the effect of the three kinds of saliva was not the same ; the submaxillary and sublingual saliva, and the mixture of the three were effective, but the parotid saliva showed no effcct. Besides, the saliva collected during and after meals proved to be more effective than that obtained before meals. As the submaxillary and sublingual saliva contains more mucin and protease, to these components the favorable effect of the saliva observed on the body growth of rats seems mainly to be attributed.
- 九州歯科学会の論文
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