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Synthesis and Characterization of CLEA-Lysozyme Immobilized PS/PSMA Nanofiber

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Abstract:

Using 0.2% glutaraldehyde as the cross-linker, lysozyme was covalently immobilized onto electrospun polystyrene/poly(styrene-co-maleic anhydride) (PS/PSMA) nanofibers as cross-linked enzyme aggregates (CLEA). The lysozyme capacity of PS/PSMA nanofibers under optimal condition was 57.6 mg/g of nanofibers. Various parameters were used to evaluate the stability of the immobilized CLEA-lysozyme. Compared to free enzyme, the immobilized CLEA-lysozyme exhibited its optimal enzymatic activity at higher temperature and pH. The immobilized CLEA-lysozyme maintained more than 78% of its initial activity during 30 days of storage period. Additionally, the immobilized CLEA-lysozyme presented a high antibacterial activity against Staphylococcus aureus. The durability determinations of such nanofibers showed 90.3% retention of the initial lysozyme activity after 80 consecutive reuses, and 81.2% of bacteriostasis ratio after 10 cycles. The results of this study suggest that CLEA-lysozyme immobilized nanofiber which can stabilize its enzymatic activity through cross-linking immobilization can be beneficial for various antibacterial processes.
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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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