INTRODUCTION

Nisin is a natural polypeptide food preservative produced through fermentation by Lactococcus lactis. Nisin possesses high inhibiting activities to Gram-positive bacteria, particularly to spore-forming bacteria. Nisin is a natural food preservative which is highly efficient, safe and has no side-effects. Nisin was awarded the Generally Regarded as Safe (GRAS) designation in the U.S. Federal Register and is approved as a natural food preservative in the U.S., the FAO/WHO and the E.U.

APPLICATIONS

1.      Plant protein foods: Nisin can also be used in plant protein foods such as soya-bean milk, lactones bean curd, bean cheese, and peanut milk to extend their shelf life and improve their safety.

2.      Canned food: Adding 0.1g/kg nisin to canned food can prolong the food storage time to 2 years at blazing temperature. Moreover, its use in canned foods can also decrease the heat-treatment degree by 50%, which not only saves energy but also improves the nutritional value, appearance, and quality of the foods.

3.      Fruit juice drinks: The addition of 0.05-0.1g/kg nisin can prevent the growth and reproduction of survival alicyclobacillus spores and guarantee the quality of fruit juice drinks.

4.      Liquid egg and egg-contained products: Adding 0.05-0.1g/kg nisin to liquid egg or egg-contained products can effectively inhibit heat-resistant spores and prolong the shelf life from 7 days to over one month.

5. Bebida alcoólica: A nisina não pode inibir a levedura e, portanto, pode ser usada na fermentação de bebidas alcoólicas, como cerveja, vinho de frutas e outros produtos vitivinícolas.

Em conclusão, a nisina é um conservante alimentar natural versátil que pode ser usado em uma variedade de aplicações para prolongar a vida útil e melhorar a segurança alimentar.

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