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Keywords:

  • antibacterial peptide;
  • Bacillus licheniformis ;
  • Bioactive film;
  • biopreservation

Abstract

Aims

An attempt was made to evaluate the effectiveness of partially purified antibacterial peptide (ppABP) produced by Bacillus licheniformis Me1 for food preservation by means of active packaging.

Methods and Results

The active packaging films containing ppABP were developed using two different packing materials [low-density polyethylene (LDPE) and cellulose films] by two different methods: soaking and spread coating. The activated films showed antibacterial activity against pathogens. The release study of ppABP from coated film showed that the LDPE films liberated ppABP as soon as it comes in contact with water, while gradual release of coated ppABP was observed in case of cellulose films. The activated films showed residual activity in different simulating conditions, such as pH of food and storage temperatures. The activated films demonstrated its biopreservative efficacy in controlling the growth of pathogens in cheese and paneer.

Conclusions

The ppABP-activated films were found to be effective for biopreservation. The ppABP from active films got diffused into the food matrix and reduced the growth rate and maximum growth population of the target micro-organism.

Significance and impact of the Study

Both types of ppABP-activated films can be used as a packaging material to control spoilage and pathogenic organisms in food, thereby extending the shelf life of foods.