Phân lập và định danh vi khuẩn từ vỏ tôm lột xác có khả năng cắt mạch chitosan

Abstract

The degradation of chitosan using biological agents, especially bacteria, has been increasingly receiving attention because of its safety and environmental friendliness. This paper presents the isolation and identification of some bacterial strains from moulted shrimp shells that could be used to degrade chitosan. There were 18 bacterial strains isolated. Three of them, S3.3V, S4.2T, and S5.2V strains, had the strong chitosan degradation ability. The 16S rRNA gene sequencing method indicated that S3.3V, S4.2T, and S5.2V were Shewanella chilikensis (similarity ratio: 100%), Sphingobacterium mizutaii (similarity ratio: 99%) and Macrococcus armenti (similarity ratio: 100%), respectively.

Keywords: Chitosan degradation, low molecular weight chitosan, moulted shrimp shells