Manganese: general information
Manganese is a silver-grey metal which occurs naturally in the earth's crust. It is found in water, soil and rocks combined with sulphur, oxygen and chlorine. Manganese is …
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Manganese the protector
Manganese is an essential element for all species. It has a key role in protecting cells against the superoxide free radical O 2−, and does this as the enzyme manganese …
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8 Foods That Pack a Nutritional Punch | Britannica
The diminutive hemp seed certainly qualifies as a nutritional powerhouse. This tiny seed packs in a good amount of fiber and protein and is rich in vitamins and minerals like calcium, iron, magnesium, potassium, and vitamin E. Hemp seeds contain all essential amino acids and are also a good source of essential fatty acids, like omega-3 and omega-6.
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Aluminum-manganese-silicon alloy | Britannica
Other articles where aluminum-manganese-silicon alloy is discussed: quasicrystal: Microscopic images of quasicrystalline structures: …electron microscope image of quasicrystalline aluminum-manganese-silicon, parallel rows occur in five sets, rotated from one another by 72°, confirming that the fivefold symmetry suggested by the shape of the pentagonal dodecahedron grain …
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Trace element | Essential, Nutrients, Metabolism
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. ... Animals also require …
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Battery | Composition, Types, & Uses | Britannica
Battery, in electricity and electrochemistry, any of a class of devices that convert chemical energy directly into electrical energy. Although the term battery, in strict usage, designates an assembly of two or more galvanic …
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Magnesium deficiency | Symptoms, Causes, Treatment | Britannica
magnesium deficiency, condition in which magnesium is insufficient or is not utilized properly. Magnesium is a mineral that is essential to a variety of cellular metabolic reactions and sometimes has the ability to replace a portion of body calcium.It is also required for the synthesis of parathyroid hormone. About three-fourths of the mineral found in the body is associated with …
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Manganese in Water Treatment | Pentair Water Solutions
Manganese is an essential component of steel and iron production, per the Encyclopedia Britannica. By removing oxygen and sulfur from steel, manganese increases the metal's malleability and allows the steel to resist damage upon …
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How to Pronounce manganese
Meta description: Hear the pronunciation of manganese in American English, spoken by real native speakers. From North America's leading language experts, Britannica Dictionary
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Nervous system disease
Nervous system disease - Fluid, Mineral, Electrolyte Disorders: Abnormal secretion of antidiuretic hormone from the pituitary gland leads to confusion and seizures; it may complicate intracranial disease, especially subarachnoid hemorrhage. High or low levels of electrolytes such as sodium, potassium, calcium, and magnesium, as well as disorders of acid-base metabolism, also have …
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sbm manganese essential britannica.md · main
sbm manganese essential britannica.md; Find file Blame History Permalink sbm · 163bee31 mill2022 authored Oct 29, 2022. 163bee31 ...
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Carbohydrate | Definition, Classification, & Examples | Britannica
Two molecules of a simple sugar that are linked to each other form a disaccharide, or double sugar.The disaccharide sucrose, or table sugar, consists of one molecule of glucose and one molecule of fructose; the most familiar sources of sucrose are sugar beets and cane sugar. Milk sugar, or lactose, and maltose are also disaccharides.Before the energy in …
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Mineral deposit | Definition, Examples, & Facts | Britannica
mineral deposit, aggregate of a mineral in an unusually high concentration.. About half of the known chemical elements possess some metallic properties. The term metal, however, is reserved for those chemical elements that possess two or more of the characteristic physical properties of metals (opacity, ductility, malleability, fusibility) and are also good conductors of …
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manganese
Manganese is a chemical element with the symbol Mn. Its square on the periodic table details some of its properties, including its atomic weight, atomic number, and crystal structure. It also tells that manganese is a metal that is solid at room temperature. ... ©2025 Encyclopædia Britannica, Inc. By continuing to use this site, ...
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Coral reef
Magnesium and strontium are the most frequently occurring trace elements in reef skeletons and are measured in parts per thousand, but barium, manganese, and iron are also present and can be measured in parts per million. In Pacific corals 2.17 parts per million of uranium have been found, in Florida coral 2.36–2.95 parts per million.
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Hydrogen peroxide | Formula & Uses | Britannica
Hydrogen peroxide decomposes into water and oxygen upon heating or in the presence of numerous substances, particularly salts of such metals as iron, copper, manganese, nickel, or chromium. It combines with …
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Feed
Feed - Minerals, Fertilizers, Soil: Minerals essential for animal life include common salt (sodium chloride), calcium, phosphorus, sulfur, potassium, magnesium, manganese, iron, copper, cobalt, iodine, zinc, molybdenum, and selenium. The last six of these can be toxic to animals if excessive amounts are eaten. All farm animals generally need more common salt than is contained in …
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Manganese | Uses, Facts, & Compounds | Britannica
manganese (Mn), chemical element, one of the silvery white, hard, brittle metals of Group 7 (VIIb) of the periodic table. It was recognized as an element in 1774 by the Swedish chemist Carl Wilhelm Scheele while working with the mineral pyrolusite and was isolated the same year by his associate, Johan Gottlieb …
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manganese summary | Britannica
manganese, Metallic chemical element, one of the transition elements, chemical symbol Mn, atomic number 25. It is a silvery white, hard, brittle metal, widely distributed in Earth's crust in combination with other elements.
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ecosystem
Ecosystem, the complex of living organisms, their physical environment, and all their interrelationships in a particular unit of space. An ecosystem can be categorized into its abiotic constituents, including minerals, climate, soil, water, and sunlight, and its biotic constituents, consisting of all living members.
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Transition metal | Definition, Properties, Elements,
transition metal, any of various chemical elements that have valence electrons—i.e., electrons that can participate in the formation of chemical bonds—in two shells instead of only one. While the term transition has no …
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Amino acid
Amino acid - Building Blocks, Structure, Functions: One of the most useful manners by which to classify the standard (or common) amino acids is based on the polarity (that is, the distribution of electric charge) of the R group (e.g., side chain). Group I amino acids are glycine, alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, and tryptophan.
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Japan
Japan - Resources, Power, Economy: With few exceptions, Japan's mineral reserves are small, and the quality of those mined is often poor. Coal, iron ore, zinc, lead, copper, sulfur, gold, and silver are among the most abundant minerals (in relative terms), with lesser quantities of tungsten, chromite, and manganese. Japan also has large deposits of limestone. There is an …
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Mozambique
Mozambique - Natural Resources, Economy, Tourism: Mozambique's natural resources remained largely underdeveloped during the 1980s, but, with greater political stability after the peace accord of 1992, investment increased dramatically in a wide range of resource-development projects. The Tete highlands in the west-central region have large bituminous …
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Pyrolusite | Manganese Ore, Ore Deposits, Oxidation | Britannica
pyrolusite, common manganese mineral, manganese dioxide (MnO 2), that constitutes an important ore.Always formed under highly oxidizing conditions, it forms light-gray to black, metallic, moderately heavy coatings, crusts, or fibres that are alteration products of other manganese ores (e.g., rhodochrosite); bog, lake, or shallow marine products; or deposits left …
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Cassava | Description, Origin, Poison, Taste, Benefits, & Facts
Cassava, tuberous edible plant of the spurge family from the American tropics. It is cultivated throughout the tropical world for its tuberous roots, from which cassava flour, breads, tapioca, a laundry starch, and an alcoholic beverage are derived. Cassava probably was first cultivated by the Maya in Yucatan.
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Sir Robert Abbott Hadfield, Baronet
Sir Robert Abbott Hadfield, Baronet (born Nov. 28, 1858, Sheffield, Yorkshire, Eng.—died Sept. 30, 1940, London) was a British metallurgist who developed manganese steel, an alloy of exceptional durability that found uses in the construction of railroad rails and rock-crushing machinery.. The son of a Sheffield steel manufacturer, Hadfield took an early interest …
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