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The Degradation of Paper Cultural Properties by Cellulase  

장영훈 (공주대학교 사범대학 화학교육과)
Publication Information
KSBB Journal / v.17, no.6, 2002 , pp. 549-554 More about this Journal
Abstract
The hydrolysis of old book(Hanji) was performed using endoglucanase Ⅰ(endo Ⅰ), and exoglucanase II(exe II) and their mixtures purified from Trichoderma viride cellulase. The optimum degradation of old book(Hanji) with endo Ⅰ, exo II and endo-exo mixture(Ⅰ:Ⅰ) were exhibited at pH 4.5, 5.5, 5.0, respectively. Maximum degradations using endo Ⅰ, exo II and endo-exo mixture(Ⅰ:Ⅰ) occurred at 50$\^{C}$. The yield decreased an increasing the enzyme concentration. Especially, the yield was lowest for treatment with the endo Ⅰ-exo II mixture(Ⅰ:Ⅰ), which may be regarded as being due to a synergistic action of the cellulase components. Physical strength increased with increasing exo II concentration, and decreased with increasing concentration of endoglucanase Ⅰ. These results indicated that the degradation of old book(Hanji) depends largely upon the action of endoglucanase. Therefore, the most effective method of conserving paper cultural properties is to repress the action of endoglucanase.
Keywords
Cellulase; hydrolysis; paper cultural properties; physical strength; reducing sugar(TRS);
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