This book includes the latest information in the field of organic chemistry, biochemistry, biotechnology, material science (synthesis, properties, applications) and renewable resources. This book discusses the modification of chitosan films as a way of regulating their transport properties, ozone and its reactions with diene rubbers, antiradical activity of different antioxidants depending on pH and polarity of model system detected by a photochemilumin scence method, the interlayer spacing and elasticity modulus interconnection for nanocomposites polymer/organoclay.