The EPR spin probe and Biocatalytic characterization of Pristine halloysite nanoclayand natural halloysite mineral originated from ore has been performed. The more positive surface charge, the higher activity of both the immobilized enzyme and intrinsic catalytic activity of Halloysite material. The highest hemicellulose activity was demonstrated by the enzyme immobilized on Halloysite surface by covalent binding with APTES.

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