Vitamin B12, a complex water-soluble organic compound that is essential to a number of microorganisms and animals, including humans. Vitamin B12 aids in the development of red blood cells in …
Mn is an essential element for humans, animals, and plants; it is required for growth, development, and maintenance of health. Routes of Mn exposure are mainly through …
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Cassava is a good source of dietary fibre as well as vitamin C, thiamin, folic acid, manganese, and potassium. The tubers have a mild nutty taste and are commonly eaten as root vegetables in stews or as …
Ferromagnetism, physical phenomenon in which certain electrically uncharged materials strongly attract others. Two materials found in nature, lodestone (or magnetite, an oxide of iron, Fe3O4) and iron, have the ability to acquire such attractive powers, and they are often called natural
Oxygen, a colorless, odorless, tasteless gas essential to living organisms, being taken up by animals, which convert it to carbon dioxide; plants, in turn, utilize carbon dioxide as a source of carbon and return the oxygen to the atmosphere. Oxygen forms compounds by reaction with practically any other element.
Manganese is an essential element in all known living organisms. Many types of enzymes contain manganese. For example, the enzyme responsible for converting water …
manganese (Mn), chemical element, one of the silvery white, hard, brittle metals of Group 7 (VIIb) of the periodic table. It was recognized as …
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.
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. ... manganese Mn 25 54.938 7.21–7.44 1,246 2,061 iron Fe 26 55.845 7.87 1,538 2,861 cobalt Co 27 58.933 8.9 1,495 2,927 nickel ...
Among the oxides of metals that exist as minerals are cuprite, or copper oxide; zincite, or zinc oxide; cassiterite, or tin oxide; and rutile, or titanium oxide. Pyrolusite, or manganese oxide, is the chief ore of manganese. Among the ores of iron are the oxides hematite and magnetite. Lodestone, a form of magnetite, is a natural magnet.
Articles from Britannica Encyclopedias for elementary and high school students. cobalt - Children's Encyclopedia (Ages 8-11) ... cobalt is a trace element essential in the nutrition of ruminants ... cobalt content. Rather, it is often recovered as a by-product from the mining of ores of iron, nickel, copper, silver, manganese, zinc, and …
According to Britannica, a significant proportion of the manganese manufactured globally is used in the form of ferromanganese and silicomanganese alloys for steel and iron production. When manganese is added to produce an alloy, it results in a strong, hard, wear-resistant material. ... Manganese is essential to the growing EV …
Philippines - Resources, Power, Economy: Although the Philippines is rich in mineral resources, mining activities constitute only a small portion of GDP and employ an even smaller fraction of the population. Most of the country's metallic minerals, including gold, iron ore, lead, zinc, chromite, and copper, are drawn from major deposits on the …
Cassava is a perennial plant with conspicuous, almost palmate (fan-shaped) leaves resembling those of the related castor-oil plant but more deeply parted into five to nine lobes. The fleshy roots are reminiscent of dahlia tubers. Different varieties range from low herbs to branching shrubs and slender unbranched trees.Some are adapted to dry …
Manganese is an essential mineral, and we need to obtain it from our diet, but the mineral is present in a broad range of foods. For this reason, most well-formulated diets should provide a sufficient intake of manganese. The easiest way to get manganese is through grains, legumes, nuts, and drinking tea.
periodic table, in chemistry, the organized array of all the chemical elements in order of increasing atomic number—i.e., the total number of protons in the atomic nucleus. When the chemical elements …
Manganese (Mn) is a hard, silvery white metal with a melting point of 1,244 °C (2,271 °F). Ordinarily too brittle to be of structural value itself, it is an essential agent in …
The purpose of this review is to show the role of Mn as an essential micronutrient and as a toxic element to higher plants as well as to their transport and tolerance mechanisms. Manganese is an essential element for plants, intervening in several metabolic processes, mainly in photosynthesis and as an enzyme antioxidant-cofactor. Nevertheless, an …
The cucumber plant is a tender annual with a rough, succulent, trailing stem. The hairy leaves have three to five pointed lobes, and the stem bears branched tendrils by which the plant can be trained to supports. The five-petaled yellow flowers are unisexual and produce a type of berry known as a pepo. The heat requirement is one of …
South Africa - Resources, Power, Economy: South Africa is rich in a variety of minerals. In addition to diamonds and gold, the country also contains reserves of iron ore, platinum, manganese, chromium, copper, uranium, silver, beryllium, and titanium. No commercially exploitable deposits of petroleum have been found, but there are moderate …
Manganese is an essential mineral, and we need to obtain it from our diet, but the mineral is present in a broad range of foods. For this reason, most well-formulated diets should provide a sufficient intake of …
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 …
Manganese (chemical symbol Mn, atomic number 25) is a gray-white metal that combines with other elements in various proportions. In nature, it occurs mainly in the form of a black-brown oxide (MnO 2), which was used as a paint pigment as far back as 17,000 years ago. Manganese is part of the iron group of elements that are thought to be synthesized in …
The purpose of this review is to show the role of Mn as an essential micronutrient and as a toxic element to higher plants as well as to their transport and tolerance mechanisms. Manganese is an essential …
MANGANESE meaning: a grayish-white usually hard metal that breaks easily
Water inflow was a very important problem in underground mining until James Watt invented the steam engine in the 18th century. After that, steam-driven pumps could be used to remove water from the deep mines of the day. Early lighting systems were of the open-flame type, consisting of candles or oil-wick lamps. In the latter type, coal oil, …
Transition metal - Enzymes, Catalysis, Co-factors: Several transition metals are important to the chemistry of living systems, the most familiar examples being iron, cobalt, copper, and molybdenum. Iron is by far the most …
