Biochemistry of Silicon and Related Problems

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.- Structural Aspects on Organosilicon Compounds.- Analysis of some Organosilicon Compounds in Biological Material.- Discussion and Summary.- Silicon in Biological Systems.- Final Discussion.- List of Participants.