Chitosan is primary derivative of chitin. its chemical structure

is unique high polymer of the basic polysaccharide with positive ion

and have special bioactivity, physical chemical quality. there are

specific properties, such as adsorption, spinning, flocculence, decomposability, hygroscopicity and increasing immunities,decreasing

the blood pressure,depress the fat and sugar of the blood, inhibit

acid, enhancing stomachic, action, promoting ulcer cure function,

thus the chitosan open up to applied domains greatly.