General Chemistry of Silicon. - Aqueous Silicic Acid Silicates and Silicate Complexes. - Hydrogen-Bonded Complexes of Silica with Organic Compounds. - The Silicon-Nitrogen Bond. A Short Survey. - Silicon in Soil Plants and Microorganisms. - Effect of Interactions of Silicious Components and Organic Substances on Life in Soil A Contribution to Plant Production. - Isolation and Characterization of a Silicon-Organic Complex from Plants. - Biodegradation of Silicon-Oxygen-Carbon- and Silicon-Carbon-Bonds by Bacteria A Reflection on the Basic Mechanisms for the Biointegration of Silicon. - Regulation of Metabolism by Silicate in Diatoms. - Role of Silicon in Diatom Metabolism and Silicification. - Physiological Significance of Silicon Compounds in Animals and Man. - Significance and Functions of Silicon in Warm-Blooded Animals. Review and Outlook. - Essentiality and Function of Silicon. - Silicon Levels in Human Tissues. - Silicon Endocrine Balance and Mineral Metabolism (Calcium and Magnesium). - The Physiological Role of Silicon and Its Anti-Atheromatous Action. - Isolation and Characterization of a Characteristic Phosphato-Silicate from Human Lungs with Silicosis. - Silicosis and Other Diseases Caused by Silicon Compounds. - Carcinogenic Potential of Silica Compounds. - Interactions of Silica and Asbestos with Macrophages. - Cellular Reactions with Silica. - Old-New Problems of Silicotic Fibrosis. - Biological and Pharmacological Effects of Organo-Silicon Compounds. - Biological Activity of Silatranes. - Biological Activity of Nitrogen-Containing Organosilicon Compounds. - Silica-Pharmaca. - The Pharmacology of Silanes and Siloxanes. - Biochemical Effects of 2 6-cis-Diphenylhexamethyl-cyclotetrasiloxane in Man. - Structural and Analytical Aspects of Organosilicon Compounds. - StructuralAspects on Organosilicon Compounds. - Analysis of some Organosilicon Compounds in Biological Material. - Discussion and Summary. - Silicon in Biological Systems. - Final Discussion. - List of Participants. Language: English