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Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth's crust, and ...
An example would be a diet low in dairy products, and hence not meeting the recommendation for calcium. Plants [ edit ] Structure of the Mn 4 O 5 Ca core of the oxygen-evolving site in plants, illustrating one of many roles of the trace mineral manganese.
Calcium propionate is used as a preservative in a wide variety of products, including: bread, other baked goods, processed meat, whey, and other dairy products. [2] In agriculture, it is used, amongst other things, to prevent milk fever in cows and as a feed supplement. [3] Propionates prevent microbes from producing the energy they need, like ...
Dairy is a great source of calcium, but other foods can help you meet your intake, too. Here are the best calcium-rich foods and how to enjoy them.
Calcium carbonate is the active ingredient in agricultural lime and is produced when calcium ions in hard water react with carbonate ions to form limescale. It has medical use as a calcium supplement or as an antacid, but excessive consumption can be hazardous and cause hypercalcemia and digestive issues.
Calcium citrate as a calcium supplement source has several benefits compared to other forms like calcium carbonate, because calcium citrate does not require an acidic environment for absorption, making it a good choice for individuals with low stomach acid, such as the elderly or those on certain medications.
Chelation is a type of bonding of ions and the molecules to metal ions. It involves the formation or presence of two or more separate coordinate bonds between a polydentate (multiple bonded) ligand and a single central metal atom. [1] [2] These ligands are called chelants, chelators, chelating agents, or sequestering agents.
The calcium cycle is a transfer of calcium between dissolved and solid phases. There is a continuous supply of calcium ions into waterways from rocks, organisms, and soils. [1] [2] Calcium ions are consumed and removed from aqueous environments as they react to form insoluble structures such as calcium carbonate and calcium silicate, [1] [3] which can deposit to form sediments or the ...