Abstract

Xanthan is a biopolymer that has many applications in gum industry such as: food, pharmaceutical, cosmetic, petroleum and many industries due to its desirable viscosity, plasticity and solidification characteristics. This is an exo-cellular polysaccharide, which is produced by Xanthomonas campestris. Xanthomonas campestris are typically pathogenic bacteria on the Brassicaceae, Piperaceae, Rosaceae. From leaves of cabbage's leaf brown spots, salad seeds, field cabbage seeds, white radish seeds which were taken from 3 different areas including Hóc Môn district, Bình Phước province and Đà Lạt city, we isolated 6 bacteria and determinated 3 bacteria are Xanthomonas campestris. Xanthan which was preliminarily cultured and obtained from these bacteria can be used in food without toxicity.