chitosan derivatives

Different chitosan derivatives and enzymatic products have different structures and physicochemical properties, which may result in novel bioactivities or novel findings in known bioactive compounds. The lack of toxicity, allerginicity with its biocompatibility, biodrgradablity and bioactivity attracted in medicine, biotechnology. The cationic character, chitosan presents a wide variety of physicochemical and biological properties, including antimicrobial, antioxidant and antihypertensive properties. These properties make it suitable for numerous applications in different fields, for instance, medicine (pharmacology, cosmetics), biotechnology, agriculture, the food industry (nutritional enhancement and food processing), the environment (waste and water treatment) and the textile industry. Generally, molecular weight of COS can be considered up to 10 kDa or less, and during preparation of different molecular weight chitosans, viscosity is used as a parameter to determine the molecular weight.