Abstract
Enzymes obtained by fermentation processes offer a number of advantages and have been widely researched and used throughout the world. This study aimed to partially characterise an inulinase produced from palm and cassava peel. The enzyme was produced via the solid-state fermentation of Aspergillus japonicus URM5633. The optimal temperatures were 50oC and 55oC, and the optimal pH values were 5.2 and 3.4 for inulinase fermentatively produced from palm and cassava peel, respectively. The thermostability measurements for inulinase produced in palm showed that the relative activity remained below 100% until 30 minutes of stability for all temperatures, but reached 106.8% at a temperature of 50oC after 60 minutes. Inulinase from the crude extract of cassava peel was pH stable and only decreased to 55% of the maximal activity over the course of the assay, suggesting that this enzyme can be used in inulinase production and can be utilized in food industries.
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