魚血汚れの洗浄について

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  • たん白質汚れの洗浄に関する研究 : 魚血液汚れの洗浄について
  • タンパクシツ ヨゴレ ノ センジョウ ニ カンスル ケンキュウ サカナ ケツエキ ヨゴレ ノ センジョウ ニツイテ
  • Removal of Proteins from Fabrics by Protease : Washing of Cotton Fabrics Soiled with Fish Blood

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Stains on clothing caused by human milk are more difficult to remove than those made by cow's milk, and this tendency is more pronounced when the stains are old. Bacteria and mold readily develop on the stains of human milk on clothing and cause yellowing of the area. It was found that the amount of human milk protein which adhere to natural fibers, such as, cotton, silk and wool is quite large, and the amount increases as the the hydrophilic capacity of the fabric increases. When protease of micro-organisms is used to wash stains due to human milk the cleansing efficiency is usually over 80%. Especially, effective are the alkaline protease of bacteria and neutral protease of actinomyces. It was also found that in washing fabrics stained by human milk, the cleansing efficiency is increased when amylase and lipase are used together with protease. The pH and temperature specificities of protease are directly reflected in the cleansing efficiency, and generally, the cleansing solution is alkaline and as the temperature increases, so does the removal rate of proteins. Generally, since alkaline protease in comparison to neutral protease has a higher stability against anionic or nonionic surface active agents, nonorganic builder, EDTA, or CMC used in detergents, the cleansing effect is enhanced by the additive action of the protease and the detergents.

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