Calcium([ˈkælsiəm]钙) is a mineral that helps build strong bones and teeth and regulates muscle contraction([kənˈtrækʃn]收缩). Milk and dairy products have long been held as an important source of calcium. In addition to calcium, Vitamin D is important because it help...
(Elements & Compounds) a malleable silvery-white metallic element of the alkaline earth group; the fifth most abundant element in the earth's crust (3.6 per cent), occurring esp as forms of calcium carbonate. It is an essential constituent of bones and teeth and is used as a deoxidizer in...
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The most abundant mineral in the body,Calciumis essential for a wide range of body parts and functions. Nearly 99% of the body’s calcium is involved in the maintenance of the bones and teeth, however, calcium alsoregulates the heart, nerves, muscles and other bodily systems. What Is Calcium?
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The fuzzy sphere in the supersymmetric model turns out to be always stable if the large-N limit is taken in such a way that various correlation functions scale. This is in striking contrast to analogous bosonic models, where the fuzzy sphere decays into the pure Yang-Mills vacuum due to ...
Vitamin D, or calciferol, is another fat soluble steroid vitamin which functions to stimulate calcium uptake from the gut and its deposition in bone.(维生素D,或钙醇,是另一种脂溶性类固醇维生素,其功能是促进钙从肠道吸收并沉积在骨头中。) Those dinosaurs on the nests were probably adult males who...
and structural element (e.g.,cell membranes, bones, and teeth). A large number of living organisms concentrate calcium in their shells or skeletons, and in higher animals calcium is the mostabundantinorganic element. Many important carbonate and phosphate deposits owe their origin to living organis...
calcium in Elements topic From Longman Dictionary of Contemporary Englishcal‧ci‧um /ˈkælsiəm/ ●●○ noun [uncountable] a silver-white metal that helps to form teeth, bones, and chalk. It is a chemical element: symbol CaExamples from the Corpuscalcium• In one path, the ...
Even in the adult, however, bone is constantly being formed and resorbed, resulting in a normal active exchange of about 12 mmol/day, in contrast to the estimated 500 mmol/day of passive exchange. In the course of one year, all the calcium in the bones of an infant could be replaced;...