Unique book presenting the latest advancements and applications of chitosan-based hydrogels and composite materials in biotechnology, environmental studies, food, medicine, water treatments, drug delivery. This book delves deeply in to the preparation, characterization and multiple applications of chitin and chitosan. The 17 chapters written by leading experts is an excellent reference source and state-of-the-art review for researchers and scientists using chitosan or biopolymers in their respective areas. This book is divided into following sections: Production and derivatives of chitosanChitosan in the textile and food industriesChitosan in biomedical applicationsChitosan in agriculture and water treatment The book is practical and readers will be able to see descriptions of chitosan production methods as well as techniques that can be used to estimate and modify their physical and chemical properties. It provides a full description not only of the traditional and recent developments in the applications of chitosan in the fields of biotechnology, environmental studies, food, medicine, water treatments, drug delivery, but it includes all of the therapeutic usages as well.