chromium


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Related to chromium: Chromium picolinate

chromium

 (Cr) [kro´me-um]
a chemical element, atomic number 24, atomic weight 51.996. (See Appendix 6.) It is an essential dietary trace element, but hexavalent chromium is carcinogenic.
chromium 51 a radioactive isotope of chromium having a half-life of 27.7 days and decaying by electron capture, emitting gamma rays. It is used to label red blood cells for measurement of red cell mass or volume, survival time, and sequestration studies, and for the diagnosis of gastrointestinal bleeding, and is used to label platelets to study their survival. Symbol 51Cr.

chro·mi·um (Cr),

(krō'mē-ŭm),
A metallic element, atomic no. 24, atomic wt. 51.9961. A dietary essential bioelement. 51Cr (half-life of 27.70 days) is used as a diagnostic aid in many disorders (for example, gastrointestinal protein loss).
[G. chroma, color]

chromium

A metallic element (atomic number 24; atomic number 51.99), which is an essential mineral that potentiates the action of insulin and is present in trace amounts in various enzymes; chromium is present in various foods including brewers’ yeast, whole grains, peanuts, wheat germ and skim milk.

chro·mi·um

(Cr) (krō'mē-ŭm)
A metallic element, atomic no. 24, atomic wt. 51.9961. A dietary essential bioelement, 51Cr (half-life of 27.70 days) is used as a diagnostic aid in many disorders (e.g., gastrointestinal protein loss).
[G. chrōma, color]

chro·mi·um

(krō'mē-ŭm)
A metallic element and essential dietary bioelement; used as diagnostic aid in many disorders (e.g., gastrointestinal protein loss).
[G. chroma, color]
References in periodicals archive ?
Fish growth under metal stress: Under sub-lethal (1/3rd of LC50) concentrations of chromium for 12-week, three fish species viz.
grade Tri-ethylene glycol, methanol, chloroform, polyvinylpyrrolidone (PVP) and Chromium acetate were purchased from Beijing Chemical Reagent, Co.
Table 3: Mean values of feed intake (g/day), live body weight (g) and feed conversion ratio on day 21 and 42 experiment in broiler birds of different groups administered chromium, vitamin E and bentonite in different combinations
Copper, Chromium, Manganese, Iron, Nickel, and Zinc Levels in Biological Samples of Diaetes Mellitus Patients.
Given the properties of fulvic acid, it is probable that the corrosion of chromium plating is caused by a sequence of reactions such as the following: the calcium chloride sprayed in large quantities in Russia and the fulvic acid in Russian soil give rise to an ion exchange reaction which generates hydrochloric acid and thereby reduces the pH value; fulvic acid bonds with chromium (to form a complex) giving rise to changes in chromium passivation film properties; and changes occur in the sacrificial protection effect of the plating film.
The concentration of manganese and chromium in soil was determined by the AB-DTPA method of [11].
The team found no evidence of such chromium shifts in ironstones from four formations that ranged from 1.7 billion to 900 million years old.
The company handles many vehicle components which need a chromium front face but no chromium on the back because clips need to be heat welded.
Leather textile and fertilizer industry extensively use the chromium in both the trivalent and hexavalent forms.
This happens more for particles with a high-sulfate content because the chromium atoms in these particles are not as well integrated into the crystal lattice.