chitinn.几丁质；角质素chitinous substance几丁质chitinolytic systems几丁质酶chitinase inducement几丁质酶诱导Chitin Viscose Fibre甲壳素粘胶纤维chitinolytic activity壳多糖分解活性chitin transacetylase壳多糖转乙酰酶chitinous degeneration淀粉样变性chitin oligosaccharide几丁质寡糖chitinivorous bacterium几丁分解菌chitin-binding protein甲壳素结合蛋白