See Also: beta limit(medicine)
pseudovitamin(medicine)
pseudovitamin B12(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
beta-1,3-galactosyl-O-glycosyl-glycoprotein beta-1,6-acetylglucosaminyl transferase(medicine)
beta-1,3-galactosyl-0-glycosyl-glycoprotein beta-1,3-N-acetylglucosaminyltransferase(medicine)
beta-1,4-mannosyl-glycoprotein beta-1,4-N-acetylglucosaminyltransferase(medicine)
UDP-GalNAc-beta-galactose beta 1,4-N-acetylgalactosaminyltransferase(medicine)
Medicine Lodge Memorial Hospital- Medicine Lodge(health)
Beta-hydroxy-beta-methylglutaryl-CoA(medicine)

pseudovitamin B12 (medicine) and beta limit (medicine)


pseudovitamin B12 (medicine)


pseudovitamin B12
<biochemistry> Cobamide cyanide phosphate, 3'-ester with 7-alpha-d-ribofuranosyladenine, inner salt; vitamin B12 with adenine replacing dimethylbenzimidazole; one of several substances produced during anaerobic fermentation by certain organisms in bovine rumen contents; it is chemically closely similar to vitamin B12 (cyanocobalamin) but without, in humans, the physiologic action of the vitamin.


beta limit (medicine)


beta limit
<radiobiology> if the plasma pressure in a tokamak becomes too high, the so-called ballooning modes become unstable and lead to a loss of confinement (sometimes catastrophic, sometimes not). The exact value at which this occurs depends strongly on the magnetic field B, the plasma minor radius a, and the toroidal plasma current I, such that maximum value of the normalised beta, beta_N=betaBa/I, is around 4% (with B in Teslas, a in metres, and I in Mega-amperes). The exact value depends on details of the plasma shape, the plasma profiles, and the safety factor.

Synonym: troyon limit.