[ noun ] a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals <noun.substance>
Manganese \Man`ga*nese"\, n. [F. mangan[`e]se, It. manganese, sasso magnesio; prob. corrupted from L. magnes, because of its resemblance to the magnet. See {Magnet}, and cf. {Magnesia}.] (Chem.) An element obtained by reduction of its oxide, as a hard, grayish white metal, fusible with difficulty (melting point 1244[deg] C), but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic number 25; Atomic weight 54.938 [C=12.011]. [1913 Webster +PJC]
Note: An alloy of manganese with iron (called ferromanganese) is used to increase the density and hardness of steel.
{Black oxide of manganese}, {Manganese dioxide} or {Manganese peroxide}, or {Black manganese} (Chem.), a heavy black powder {MnO2}, occurring native as the mineral pyrolusite, and valuable as a strong oxidizer; -- called also familiarly {manganese}. It colors glass violet, and is used as a decolorizer to remove the green tint of impure glass.
Manganese \Man`ga*nese"\, n. [F. mangan[`e]se, It. manganese, sasso magnesio; prob. corrupted from L. magnes, because of its resemblance to the magnet. See {Magnet}, and cf. {Magnesia}.] (Chem.) An element obtained by reduction of its oxide, as a hard, grayish white metal, fusible with difficulty (melting point 1244[deg] C), but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic number 25; Atomic weight 54.938 [C=12.011]. [1913 Webster +PJC]
Note: An alloy of manganese with iron (called ferromanganese) is used to increase the density and hardness of steel.
{Black oxide of manganese}, {Manganese dioxide} or {Manganese peroxide}, or {Black manganese} (Chem.), a heavy black powder {MnO2}, occurring native as the mineral pyrolusite, and valuable as a strong oxidizer; -- called also familiarly {manganese}. It colors glass violet, and is used as a decolorizer to remove the green tint of impure glass.
Mn \Mn\, n. (Chem.) The chemical symbol for {manganese}. [PJC]
You can imagine what response they got.' Unilever said although attempts to use manganese in detergents went back many years, only 10 per cent to 15 per cent of the catalyst consisted of the chemical.
Hawaii has no offshore oil and gas leases, but it does have mineral-rich manganese crusts on seamounts near the islands.
Moreover, even if there is manganese left on the clothing, it does not later become reactivated.'
P&G was worried. Sakkab was astounded that Unilever would use manganese.
Its manganese catalyst reacts with some dyes, leading to a deterioration in the textiles. Unilever says the problem is now under control. Unilever points out that the detergent forms only some 1 1/2 per cent of its global sales.