英语语法分析

Nisin is a natural food preservative produced by certain strains of Streptococcus lactis.

尼生素是由乳酸链球菌产生的一种天然食品防腐剂。

By this separate process, yield of nisin overrun 60%.

应用此分离提取工艺，乳链菌肽的总收率在60%以上。

The development property application and market prospect of nisin were introduced in this paper.

本文概括介绍了乳酸链球菌素的开发、特性、应用及前景。