Lexic.us

Medical Definition of Carotinoid

1. Accessory lipophilic photosynthetic pigments in plants and bacteria, including carotenes and xanthophylls, red, orange or yellow, with broad absorption peaks at 450-480nm. Act as secondary light harvesting pigments, passing energy to chlorophyll and as protective agents, preventing photoxidation of chlorophyll. Found in chloroplasts and also in plastids in some nonphotosynthetic tissues, for example carrot root. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

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Literary usage of Carotinoid

Below you will find example usage of this term as found in modern and/or classical literature:

1. Carotinoids and Related Pigments: The Chromolipoids by Leroy Sheldon Palmer (1922)
"Some of the more interesting members'with a yellow color are (1) Luteolin, which is not to be confused with the carotinoid, ..."

2. Journal of Nervous and Mental Disease by American Neurological Association, Philadelphia Neurological Society, Chicago Neurological Society, New York Neurological Association, Boston Society of Psychiatry and Neurology (1920)
"Palmer has proved experimentally that chickens, deprived from birth of carotinoid pigments, show absence of yellow pigment in their skin, fat, egg yolk, ..."

3. Vital Factors of Foods: Vitamins and Nutrition by Carleton Ellis, Annie Louise Macleod (1922)
"carotinoid pigment is not necessary for the normal growth and reproduction of albino rats and apparently the fat-soluble vitamin and carotinoid pigment are ..."

4. The Newer Knowledge of Nutrition: The Use of Food for the Preservation of by Elmer Verner McCollum (1922)
"... albino rat on rations free from carotinoid pigments but rich in fat- soluble A. They first made a critical study of the presence of carotinoid pigments ..."

5. The Vitamins by Henry Clapp Sherman, Sybil Laura Smith (1922)
"They not only report a complete absence of carotinoid pigments in the albino rat, ... Growth and reproduction were also obtained with rats using carotinoid ..."

6. Vitamines: Essential Food Factors by Benjamin Harrow (1922)
"... in which there is complete absence of (carotinoid) pigments, with ewe milk fat and pigment (carotinoid)—free egg yolk as the sole sources of vita- mine ..."

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