Health / Dentistry / Carbons: Vitreous (polycrystalline or glassy) or pyrolytic graphitic structures of relatively hard, inert, and stable compounds that are conductors of thermal and electrical energy. Characterized by ionic and Van der Waals type atomic bonding. Primarily carbon or carbon-silicon compounds. Once used in endosseous dental implant system and as implant coatings.
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Business / Agriculture / Chlorinated Hydrocarbons: Also known as organochlorines, these synthetic organic compounds contain chlorine. They tend to be persistent in the environment and to biomagnify in the food chain. Chlorinated hydrocarbons that are MORE
Science / Biology / Chlorofluorocarbons (CFCS): Chemical substances used in refrigerators, air conditioners, and solvents that drift to the upper stratosphere and dissociate. Chlorine released by CFCs reacts with ozone, eroding the ozone layer. MORE
Science / Periodic Table of Elements / Palladium (Pd): Atomic number: 46, Atomic mass: 106.42 g.mol -1, Electronegativity: 2.2, Density: 11.9 g.cm-3 at 20?°C, Melting point: 1560 ?°C, Boiling point: 2927 ?°C, Isotopes: 9, Vanderwaals radius: 0.065 nm ( MORE