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calcium 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈkalsēəm/,
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The chemical element of atomic number 20, a soft gray metal,
  1. The chemical element of atomic number 20, a soft gray metal

  1. a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
  2. Calcium (Ca2+) plays a pivotal role in the physiology and biochemistry of organisms and the cell. It plays an important role in signal transduction pathways, where it acts as a second messenger, in neurotransmitter release from neurons, contraction of all muscle cell types, and fertilization. ...
  3. A chemical element, atomic number 20, that is an alkaline earth metal and occurs naturally as carbonate in limestone and as silicate in many rocks
  4. A mineral that helps build and maintain strong bones and teeth, regulate heartbeat and muscle contractions, and ensure proper blood clotting. Adequate intake can help prevent or minimize osteoporosis.
  5. Chemical element needed for healthy teeth, bones and nerves
  6. A mineral that is the primary component of hydroxyapatite. It is also vital to many physical processes, including heart rate, blood pressure, muscle contractions, the transmission of nerve signals, and the regulation of internal organs.
  7. A necessary element used by salt water corals and other organisms for their calcium carbonate skeleton or shell.
  8. a mineral necessary for the development of healthy bones. Adequate levels of Vitamin D are necessary to facilitate calcium absorption.
  9. A nutritional element which makes teeth strong and hard.
  10. One of the principal elements making up the earth's crust; its compounds, when dissolved, make the water hard. The presence of calcium in water is a factor contributing to the formation of scale and insoluble soap curds which are a means of clearly identifying hard water.
  11. An ion that lowers mash/wort pH.
  12. A mineral found in teeth, bones, and other body tissues.
  13. An alkaline element found in most tissues, it is an abundant mineral in the body. It is essential for maintenance of bones and teeth, normal heart, muscle, and nerve functions, as well as normal blood clotting. ...
  14. A mineral that the body needs for strong bones and teeth. Calcium may form stones in the kidney.
  15. An essential element that is obtained through food. A proper balance of this element is critical to cell survival.
  16. A mineral that is the major building block of corals and other calcareous organisms. In a reef tank, calcium levels should be maintained between 380 and 480 mg/l. Calcium levels can be maintained through regular water changes, by using calcium additives, or through the use of kalkwasser.
  17. Ca, is an element needed by corals, clams and certain algaes to grow. Natural Saltwater has a range of approximately 380 - 450 mg/L and it can be difficult to keep this level up in an aquarium with calcium consuming corals, clams and algae. There are various ways to keep the calcium levels up. ...
  18. An element essential to formation of eggshell and bone in birds. Hummingbirds get calcium by eating small insects.
  19. (in  calcium (Ca) (chemical element): Properties, occurrence, and uses)
  20. A soft, silver- white chemical element found in limestone, marble and chalks.
  21. An abundant natural element that enters the water system through weathering of rocks (especially limestone) and from the soil through seepage and runoff.  Groundwater generally contains a higher concentration than surface water and when treated with lime will be even greater.
  22. (in terms of HB research): Acid rain has caused the leaching of calcium, a natural component of HBEF soils very important to plant growth, from forest soils over the past several decades. ...
  23. Mineral bone constituent, and important nutrient.
  24. No specific recommendation, but high calcium is associated with hardness, total dissolved solids problems and can cause aesthetic problems.