ArticleBrazilian journal of microbiology : [publication of the Brazilian Society for Microbiology]2025
Immobilization of crude cellulase from Aspergillus foetidus on agar xerogel and its application for carrot juice extraction.
Article in Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology], 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study investigates the immobilization of crude cellulase from Aspergillus foetidus, produced through solid-state fermentation by different methods, including entrapment in agar cube, adsorption on agar xerogel, and adsorption on agar xerogel pretreated with glutaraldehyde. The immobilization efficiency achieved was 90.80%, 84.08%, and 84.23%, while enzyme activity obtained was 1.12 IU/g, 1.52 IU/g, and 1.48 IU/g for crude cellulase immobilized by entrapment in agar cube, adsorption on agar xerogel, and adsorption on agar xerogel pretreated with glutaraldehyde respectively. The immobilized crude cellulase was characterized, revealing an optimal temperature shift from 50 °C to 60 °C for agar xerogel-adsorbed crude cellulase, which improved its thermal stability. The pH optimum for free and all immobilized crude cellulase was observed at pH 4. Also, all immobilized crude cellulases retained significant activity even after multiple cycles, depicting their reusability. The enzyme kinetics observed were K
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