Health / Vitamins / Nitrosamine: Potentially carcinogenic compounds formed by the reactions of nitrites with amines or amides normally present in the body. MORE
Science / Periodic Table of Elements / Nitrogen (N): Atomic number: 7, Atomic mass: 14.0067 g.mol -1, Electronegativity: 3.0, Density: 1.25*10-3 g.cm-3 at 20?°C, Melting point: -210 ?°C, Boiling point: -195.8 ?°C, Vanderwaals radius: 0.092 nm, Ionic MORE
Science / Periodic Table of Elements / Hydrogen (H): Atomic number: 1, Atomic mass: 1.007825 g.mol -1, Electronegativity: 2.1, Density: 0.0899*10 -3 g.cm -3 at 20 ?°C, Melting point: - 259.2 ?°C, Boiling point: - 252.8 ?°C, Vanderwaals radius: 0.12 n MORE
Science / Marine Biology / Chemosynthesis: Primary production of organic matter, using various substances instead of light as an energy source; confined to a few groups of microorganisms MORE