プロテアーゼによる固体粒子・たん白質複合汚れの洗浄に及ぼすCaイオンの影響(第2報) : プロテアーゼ・界面活性剤・ビルダー共存系でのプロテアーゼの安定性が洗浄性に及ぼす影響

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In systems composed protease, ionic surfactant (sodium dodecylbenzene sulfonate, DBS), and builder, effect of the protease activity in the presence of Ca2+ on the removal of complex soils. The model soils examined were ferric iron oxide, gelatin, and feriric iron oxide-gelatin complex. Polyvinylalcohol (PVA) as nonionic builder, stylenesulfonate-methacrylate (3:7) copolymer (US) and sodium tripolyphosphate (STP) as ionic builder were used. Though Ca2+ had little effect on the removal of ferric iron oxide, it enhanced markedly the removal of gelatin and complex soils. The concentration of Ca2+ required to gain the maximum removal of soils, ca. 80% for fabric soiled with gelatin alone and 60-70% for complexly soiled fabric, increased in the order, system without builder≒PVA containing system < US containing system < STP containing system. It was concluded that Ca2+ effected on the removal of gelatin and complex soils from fabric through the essential roles in activation of protease and formation of complex between protease and soil as substrate.
松山東雲女子大学・松山東雲短期大学の論文