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Xylanase is widely used in pulp and paper bleaching. In this study, the effects of rare earth ions (La3+, Ce3+, Er3+ and Gd3+) on the activity of xylanase produced by Penicillium are investigated and the application of a xylanase solution containing La3+ in paper bleaching is presented. Our results indicate that the bleaching effect of the enzyme solution containing La3+ was markedly better when the...
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