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Updated: Jan 29, 2026

Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization
Published on: July 11, 2012
Improving the stability of bacteriocin extracted from Enterococcus faecium by immobilization onto cellulose
Priyanka Bagde1, Nadanathangam Vigneshwaran1
1ICAR-Central Institute for Research on Cotton Technology (ICAR-CIRCOT), Matunga, Mumbai 400019, India.
Abstract:
Enterococcus faecium (E. faecium) isolated from Vigna mungo (Black gram) produced bacteriocin that inhibits both Gram positive and Gram negative bacteria and better heat stability (100 °C for 30 min). The bacteriocin was sensitive to protease treatment and most active in acidic pH. Bacteriocin produced by Pediococcus acidilactici was used for comparison. To enhance stability for diversified applications, the bacteriocin was immobilized by physical adsorption onto cellulose nanocrystals (CNC) extracted from cotton linters. The bacteriocin immobilization yield was 64.91% for P. acidilactici and 53.63% for E. faecium. The bacteriocin immobilized CNC was characterized by DLS particle sizing, FTIR and AFM to evaluate size distribution, chemical nature and surface morphology. The bacteriocins immobilized on CNC showed 50% increase in stability in terms of antibacterial activity. The enzymatic synthesis of CNC in combination with physical adsorption immobilization method for bacteriocin makes it an efficient system of producing antibacterial nanofillers for food packaging and bio-composites applications.
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