manganese

An essential trace element. Present in cells as concentrations of around 0.01mM. Activates a wide range of enzymes eg. pyruvate carboxylase and one family of superoxide dismutases. Resembles magnesium and may replace it in many enzymes when it can modify substrate specificities. The addition of manganese salts to buffer solutions will often make cells very adhesive. ...

Manganese

Manganese is a chemical element, designated by the symbol Mn. It has the atomic number 25. It is not found as a free element in nature; it is often found in combination with iron, and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Historically, manganese is named for various bla...
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Manganese

• (n.) An element obtained by reduction of its oxide, as a hard, grayish white metal, fusible with difficulty, but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic weight 54.8.
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Manganese

(Minor Nutrient) Leaf yellowing occurs when there is manganese deficiency.
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manganese

(Mn) (mang´gә-nēs) a chemical element, atomic number 25, atomic weight 54.938. Its salts occur in the body tissue in very small amounts and serve as activators of liver arginase and other enzymes.
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manganese

Mn noun a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
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manganese

(Mn) A gray-white or silvery, brittle metallic element in group VIIB of the periodic table; a transition element. It is found naturally in the ores pyrolunite and manganite, and occurs in several allotropic forms. Elementary manganese is obtained by the reduction of mangane...
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manganese

(Mn) Type: Term Pronunciation: mang′gă-nēs Definitions: 1. A metallic element resembling iron and often associated with it, particularly in ores; atomic no. 25, atomic wt. 54.94; manganous salts are often used in medicine. Synonyms: manganum
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Manganese

Man`ga·nese' noun [ French manganèse , Italian manganese , sasso magnesio ; probably corrupted from Latin magnes , because of its resemblance to the magnet. See Magnet , and confer Magnesia .] (Chemistry) An element obtained by reduction of its oxide...
Found on http://www.encyclo.co.uk/webster/M/17

Manganese

A gray-white nonmagnetic metallic element resembling iron, except it is harder and more brittle. Man
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manganese

An essential trace element. Present in cells as concentrations of _ 0.01&nbsp, mM. Activates a wide range of enzymes for example pyruvate carboxylase and one family of superoxide dismutases. Resembles magnesium and may replace it in many enzymes when it can modify substrate specificities. The addition of manganese salts to buffer solutions will...
Found on http://www.encyclo.co.uk/local/20973

manganese

chemical element, one of the silvery-white, hard, brittle metals of Group VIIb of the periodic table. It was recognized as an element (1774) by the ... [24 related articles]
Found on http://www.britannica.com/eb/a-z/m/25

manganese

Hard, brittle, grey-white metallic element, atomic number 25, relative atomic mass 54.9380. It resembles iron (and rusts), but it is not magnetic and is softer. It is used chiefly in making steel alloys, also alloys with aluminium and copper. It is used in fertilizers, paints, and industrial chemicals. It is a necessary trace element in human n...
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manganese

manganese (măng'gunēs, măn'–) [Lat.,=magnet], metallic chemical element; symbol Mn; at. no. 25; at. wt. 54.938; m.p. about 1,244°C; b.p. about 1,962°C; sp. gr. 7.2 to 7.45, depending on form; valence principally +2, +4, or +7.Manganese is a pinkish-gray, chemi...
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Manganese

Manganese is a metalic element with the symbol Mn, atomic weight 55, and a reddish-white colour. It has a high metallic lustre, is harder than iron, and is difficult to fuse. It does not readily tarnish, does not decompose water, but reacts readily with most dilute acids.
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Manganese

Obtained by reduction with aluminium or in a blast furnace. Pure manganese is a hard, brittle, silvery coloured, metallic element which exists in three polymorphic forms (alpha, beta and gamma) and has a complicated crystal structure. It resembles iron in being moderately reactive and dissolving in cold, dilute non-oxidising acids. When exposed to ...
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manganese

Silver-white, very brittle heavy metal or element (Mn). In nature, it is often associated with iron in many minerals. These are brownstone, brownstone, hausmannite and manganite as well as iron ores. For the Rebstock is manganese as nutrient important in small quantities. It is involved in the carbohydrate and protein metabolism, as well as in the ...
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manganese

[n] - a hard brittle gray polyvalent metallic element that resembles iron but is not magnetic
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