“calcium”的概念、定义、翻译、参考文献-科学参考

calcium

Chemistry

A soft grey metallic element belonging to group 2 (formerly IIA) of the periodic table; a.n. 20; r.a.m. 40.08; r.d. 1.54; m.p. 839°C; b.p. 1484°C. Calcium compounds are common in the earth’s crust; e.g. limestone and marble (CaCO₃), gypsum (CaSO₄.2H₂O), and fluorite (CaF₂). The element is extracted by electrolysis of fused calcium chloride and is used as a getter in vacuum systems and a deoxidizer in producing nonferrous alloys. It is also used as a reducing agent in the extraction of such metals as thorium, zirconium, and uranium.
Calcium is an essential element for living organisms, being required for normal growth and development. In animals it is an important constituent of bones and teeth and is present in the blood, being required for muscle contraction and other metabolic processes. In plants it is a constituent (in the form of calcium pectate) of the middle lamella.
Calcium was discovered by Sir Humphry Davy in 1808.
https://www.webelements.com/calcium/ Information from the WebElements site

Biology

Symbol Ca. A soft grey metallic element that is an essential element for living organisms, being required for normal growth and development. In animals it is an important constituent of bones and teeth and is present in the blood, being required for muscle contraction and other metabolic processes. In plants it is a constituent (in the form of calcium pectate) of the middle lamella. Calcium ions play a key role in various intracellular signalling pathways and control fusion of vesicles with the plasma membrane in diverse situations, including release of neurotransmitter at synapses, secretion of hormones such as insulin, and activation of the fertilized egg (see calcium ion channel; calcium pump; snare). See also calmodulin.

单词	calcium
释义	calcium Chemistry A soft grey metallic element belonging to group 2 (formerly IIA) of the periodic table; a.n. 20; r.a.m. 40.08; r.d. 1.54; m.p. 839°C; b.p. 1484°C. Calcium compounds are common in the earth’s crust; e.g. limestone and marble (CaCO₃), gypsum (CaSO₄.2H₂O), and fluorite (CaF₂). The element is extracted by electrolysis of fused calcium chloride and is used as a getter in vacuum systems and a deoxidizer in producing nonferrous alloys. It is also used as a reducing agent in the extraction of such metals as thorium, zirconium, and uranium. Calcium is an essential element for living organisms, being required for normal growth and development. In animals it is an important constituent of bones and teeth and is present in the blood, being required for muscle contraction and other metabolic processes. In plants it is a constituent (in the form of calcium pectate) of the middle lamella. Calcium was discovered by Sir Humphry Davy in 1808. https://www.webelements.com/calcium/ Information from the WebElements site Biology Symbol Ca. A soft grey metallic element that is an essential element for living organisms, being required for normal growth and development. In animals it is an important constituent of bones and teeth and is present in the blood, being required for muscle contraction and other metabolic processes. In plants it is a constituent (in the form of calcium pectate) of the middle lamella. Calcium ions play a key role in various intracellular signalling pathways and control fusion of vesicles with the plasma membrane in diverse situations, including release of neurotransmitter at synapses, secretion of hormones such as insulin, and activation of the fertilized egg (see calcium ion channel; calcium pump; snare). See also calmodulin.
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