SEARCH Articles Figures Tables A Brief History of Natural and Synthetic Plastic Materials Activity of a Material Containing Natural U and Th Activity of a Material Containing One Natural Radionuclide Application of Natural Lignocellulosic Materials as Adsorbents for Organic Pollutants Chemical nature of raw material from biomass Contributions of textile materials to reduce the operational energy demand, and comparisons with examples from nature Extraction of natural materials Jacobs on the Nature of Active Liver Material Natural Materials Nature Materials Nature of the Support Material Nature of the raw materials Perfumery Materials of Natural Origin Production of Natural Flavoring Materials by Enzymatic Action Production of Natural Flavoring Materials by Microbial Action Survey of Natural Raw Materials