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A large amount of highly purified hydroxytyrosol (91-94% in weight) is obtained in short time by a simple biotransformation of Olea europaea leaf extract by a partially purified hyperthermophilic β-glycosidase immobilized on chitosan support. The biotransformation conditions have been modulated for increasing the hydroxytyrosol yield, whilst chitosan and chitin matrices are used as adsorbent materials...
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