Business / Machine Shop / Oxygen: A colorless, odorless, tasteless, gaseous chemical element, the most abundant of all elements. Oxygen occurs free in the atmosphere, forming 1/5 of its volume and in combination in water, sandstone, limestone, etc.: it is very active being able to combine with nearly all other elements and is essential to life.
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Science / Periodic Table of Elements / Oxygen (O): Atomic number: 8, Atomic mass: 15.999 g.mol -1, Electronegativity: 3.5, Density: 1.429 kg/m3 at 20?°C, Melting point: -219 ?°C, Boiling point: -183 ?°C, Vanderwaals radius: 0.074 nm, Ionic radius: MORE
Science / Marine Biology / Oxygen Technique (Primary Productivity): The estimation of primary productivity by the measurement of the rate of oxygen increase MORE
Science / Marine Biology / Oxygen Minimum Layer: A depth zone, usually below the thermocline, in which dissolved oxygen is minimal MORE