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manganese    音标拼音: [m'æŋgən,iz]
n. 锰[金属元素]

锰[金属元素]

manganese
n 1: a hard brittle grey polyvalent metallic element that
resembles iron but is not magnetic; used in making steel;
occurs in many minerals [synonym: {manganese}, {Mn}, {atomic
number 25}]

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.
[1913 Webster]

{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.
[1913 Webster]


Mn \Mn\, n. (Chem.)
The chemical symbol for {manganese}.
[PJC]

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  • Manganese - Wikipedia
    Manganese is a chemical element; it has symbol Mn and atomic number 25 It is a hard, brittle, silvery metal, often found in minerals in combination with iron Manganese was first isolated in the 1770s It is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels It improves strength
  • Manganese: Health benefits and side effects - Medical News Today
    Manganese is a trace mineral It is vital for the human body, but people only need it in small amounts Health benefits of manganese can include providing antioxidants, supporting bone health,
  • Manganese - Health Professional Fact Sheet - Office of Dietary . . .
    Manganese is an essential trace element that is naturally present in many foods and available as a dietary supplement Manganese is a cofactor for many enzymes, including manganese superoxide dismutase, arginase, and pyruvate carboxylase [1, 2]
  • Manganese | Uses, Facts, Compounds | Britannica
    Manganese, chemical element that is a silvery white, hard, brittle metal of Group 7 in the periodic table It was recognized as an element in 1774 by the Swedish chemist Carl Wilhelm Scheele Although rarely used in pure form, manganese is essential to steelmaking
  • Manganese - The Nutrition Source
    Manganese is a trace mineral that is essential to our bodies in small amounts Because we cannot make it, we must obtain it in food or supplements Manganese is a coenzyme that assists many enzymes involved in breaking down carbohydrates, proteins, and cholesterol [1]
  • Manganese: Health Benefits, Side Effects, Uses, Dose Precautions - RxList
    Manganese is used for prevention and treatment of manganese deficiency, a condition in which the body doesn't have enough manganese It is also used for weak bones ( osteoporosis ), a type of “tired blood” ( anemia ), and symptoms of premenstrual syndrome (PMS)





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