carotene


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Related to carotene: alpha carotene

carotene

(kâr`ətēn'), long-chained, unsaturated hydrocarbon found as a pigment in many higher plants, particularly carrots, sweet potatoes, and leafy vegetables. Carotene is thought to assist in trapping light energy for photosynthesisphotosynthesis
, process in which green plants, algae, and cyanobacteria utilize the energy of sunlight to manufacture carbohydrates from carbon dioxide and water in the presence of chlorophyll. Some of the plants that lack chlorophyll, e.g.
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 or to aid in chemical reduction. It is important in animal biology as the main dietary source of vitamin A (see vitaminvitamin,
group of organic substances that are required in the diet of humans and animals for normal growth, maintenance of life, and normal reproduction. Vitamins act as catalysts; very often either the vitamins themselves are coenzymes, or they form integral parts of coenzymes.
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), which is produced by splitting one molecule of carotene into two molecules of vitamin A. Carotene that is thus converted is called provitamin A. This reaction occurs in either the liver or intestinal wall. The absorption of dietary carotene is dependent on the action of bile. Its absorption is less efficient than that of vitamin A. High intake of dietary carotene is being studied for its disease prevention potential. Carotenes are the simplest of a group of natural pigments called carotenoids, of which there are more than 600.

carotene

[′kar·ə‚tēn]
(biochemistry)
C40H56 Any of several red, crystalline, carotenoid hydrocarbon pigments occurring widely in nature, convertible in the animal body to vitamin A, and characterized by preferential solubility in petroleum ether. Also known as carotin.

carotene

, carotin
any of four orange-red isomers of an unsaturated hydrocarbon present in many plants (β-carotene is the orange pigment of carrots) and converted to vitamin A in the liver. Formula: C40H56
References in periodicals archive ?
In beta- carotene group the number of cells and their morphology was better than the control group.
Conclusion: Beta carotene has protective role on histomorphology of kidneys in subacute APAP-induced renal damage in rats.
Serum carotene was then extracted with petroleum ether and analyzed using spectrophotometry at a wavelength of 440 nm.
Statistical design and monitoring of the Carotene and Retinol Efficacy Trial (CARET).
The investigators concluded that "an above-median intake of the combination of vitamins C and E, beta carotene, and zinc was associated with a 35 percent lower risk of incident AMD.
It is high in fiber, calcium, iron, beta carotene (vitamin A), and vitamin E.
As beta carotene has clearly no benefit and even a hint of possible harm, I can see no reason that people should take it," comments National Cancer Institute director Richard Klausner.
Beta carotene, a carotenoid, is found in yellow and orange foods.
Scientists were surprised and reporters dumbfounded--or else gleeful at the prospect of shocking headlines--by the recently published results of a Finnish study on beta carotene and vitamin E.
Of these nutrients, beta carotene has received the most attention of late, and some manufacturers of dietary supplements containing beta carotene have been promoting these products as possible cancer preventives.
At low concentrations, [Beta] - carotene 10% Emulsion Red offers pinkish pastel shades which become a strawberry red colour at higher dosage rate, [Beta] - carotene 10% Emulsion Red is process stable, has excellent colour stability and superior resistance to ringing in beverage applications.