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Development of an antimicrobial bioactive paper made from bacterial cellulose

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Bacterial cellulose (BC) has emerged as an attractive adsorptive material for antimicrobial agents due to its fine network structure, its large surface area, and its high porosity. In the present study, BC paper was first produced and then lysozymewas immobilized onto it by physical adsorption, obtaining a composite of lysozyme-BC paper. The morphology and the crystalline structure of the composite were similar to that of BC paper as examined by scanning electron microscopy and X-ray diffraction, respectively. Regarding operational properties, specific activities of immobilized and free lysozymewere similar. Moreover, immobilized enzyme showed a broaderworking temperature and higher thermal stability. The composites maintained its activity for at least 80 dayswithout any special storage. Lysozyme-BC paper displayed antimicrobial activity against Gram-positive and Gram-negative bacteria, inhibiting their growth by 82% and 68%, respectively. Additionally, the presence of lysozyme increased the antioxidant activity of BC paper by 30%. The results indicated that BC is a suitable material to produce bioactive paper as it provides a biocompatible environment without compromising the activity of the immobilized protein. BC paper with antimicrobial and antioxidant properties may have application in the field of active packaging.

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International Journal of Biological Macromolecules, 2020, vol. 158, p. 587-594

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Articles publicats en revistes (Genètica, Microbiologia i Estadística)

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Development of an antimicrobial bioactive paper made from bacterial cellulose