@article{oai:soar-ir.repo.nii.ac.jp:00017655, author = {太田, 久枝}, journal = {信州大学教養部紀要. 第二部, 自然科学}, month = {Feb}, note = {This paper is intended to quantify and analyse small quantitative ingredients of both rice hulls and buckwheat chaffs, and to investigate into their special qualities. We can get the following result. Rice hulls contain in them about 260 times as much of silicid acid as buckwheat chaffs. And, second to that, the former has 7. 2 times as much of afh as the latter. On the other hand, as to other chemical compositions such as calcium oxide, magnesium oxide, and phosphoric acid, rice hulls contain much more than buckwheat chaffs. This silicid acid, when it is contained in rice hulls, shows such special qualities that the hulls are rough and stiff, of glassy luster and touch, splash off moisture. Moreover, there is a thick hair on the outer skins of rice hulls, and to feel them causes us pain. But they are difficult to get musty. These special qualities are revealed as the result of the experiments reported in the last report Part Seven. It is the important subject for rice planting whether or not to have silicid acid. Rice plant itself has the capacity to have a great quantity of silicid acid from the soil, and increases that content by giving fertlizers to the soil. Silicid acid makes rice hulls and rice straws strong and stiff, protects grains of rice, stimulates generative function and growth, and prevents the plant from falling by wind and storm. Therefore, it may be said that it is contradictory all the time to use rice hulls with such special qualities as mentioned in these Reports for a stuffing in a pillow., Article, 信州大学教養部紀要. 第二部, 自然科学 1: 59-64(1967)}, pages = {59--64}, title = {枕の充填剤の研究(8報):「もみがら,そばがらの化学成分の定量と両者の特性について」}, volume = {1}, year = {1967} }