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Cobalt is essential to the metabolism of all animals. It is a key constituent of cobalamin, also known as vitamin B 12, the primary biological reservoir of cobalt as an ultratrace element. [188] [189] Bacteria in the stomachs of ruminant animals convert cobalt salts into vitamin B 12, a compound which can only be produced by bacteria or archaea.
Cobalt is essential to the metabolism of all animals. It is a key constituent of cobalamin, also known as vitamin B 12, the primary biological reservoir of cobalt as an ultratrace element. [1] [2] Bacteria in the stomachs of ruminant animals convert cobalt salts into vitamin B 12, a compound which can only be produced by bacteria or archaea.
Of the group 9 elements, only cobalt has a biological role. It is a key constituent of cobalamin, also known as vitamin B 12, the primary biological reservoir of cobalt as an ultratrace element. [21] [22] Bacteria in the stomachs of ruminant animals convert cobalt salts into vitamin B 12, a compound which can only be produced by bacteria or ...
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
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Naturally occurring cobalt, Co, consists of a single stable isotope, 59 Co (thus, cobalt is a mononuclidic element). Twenty-eight radioisotopes have been characterized; the most stable are 60 Co with a half-life of 5.2714 years, 57 Co (271.811 days), 56 Co (77.236 days), and 58 Co (70.844 days). All other isotopes have half-lives of less than ...