SEARCH Articles Figures Tables A Brief History of Natural and Synthetic Plastic Materials Analysis of Natural Products versus Drugs and Synthetics Application of Natural and Synthetic Isotopes Biological functions of natural and synthetic Biological functions of natural and synthetic bioactive heterocycles Blends of Natural and Synthetic Polymers Chlorination synthetic natural rubbers Cyclization synthetic natural rubbers Degradable polymers, natural synthetic Diels-Alder type natural products synthetic studies Diene Polymers Natural and Synthetic Rubbers Examples of natural and synthetic polymers From Natural to Synthetic INDEX synthetic natural rubbers Introduction Colors, Natural and Synthetic, in the Ancient World Isoprene synthetic natural rubber Leather, natural synthetic Mixtures of synthetic and natural NATURAL AND SYNTHETIC FERTILIZERS HELP RESTORE SOIL FERTILITY Natural Biosynthesis and Synthetic Analogs of the Active Sites Natural Products and Synthetic Peptides as Inhibitors of CatA Natural Products and Synthetic Polymers Natural Rubber (NR) and Synthetic Polyisoprene Natural and High-Pressure Synthetic Diamond Natural and Synthetic Biologically Active Heterocycles Natural and Synthetic Colors in the Ancient World Natural and Synthetic Fibers Natural and Synthetic Flavorings Natural and Synthetic Graphite Natural and Synthetic Transmembrane Channels Natural and synthetic Natural and synthetic biologically-active Natural and synthetic hormones Natural compounds synthetic starting materials Natural products direct synthetic methods Natural products indirect synthetic methods Natural products solid phase synthetic techniques Natural products synthetic analogues from Natural rubber synthetic Natural, Synthetic and Hybrid Hydrogels Naturally-occurring Organometallics and Synthetic Models Nitrile Converting Enzymes Involved in Natural and Synthetic Cascade Reactions ORGANIC POLYMERS. NATURAL AND SYNTHETIC Of natural and synthetic rubbers Polyisoprene natural and synthetic rubber Polymers Natural and Synthetic Rubbers Polymers natural and synthetic Polymers natural or synthetic Properties of natural and synthetic Rubber, natural unvulcanised synthetic Rubbers natural and synthetic Synthetic Drugs vs. Natural Herbs Synthetic Natural Aroma Compounds Synthetic Selenium Analogues of Sulfur-Containing Natural Products Synthetic and Natural Fibres Synthetic and natural gas systems Synthetic biology antimicrobial natural products Synthetic compounds compared with natural Synthetic drugs and natural products Synthetic drugs’ natural origins Synthetic natural gas Synthetic polyisoprene Natural rubber Synthetic polyisoprene rubbers comparison with natural rubber THE NATURE OF SYNTHETIC MEMBRANES Thermochemistry of Synthetic and Natural Polyelectrolytes in Solution Total Syngas Methanation to Synthetic Natural Gas