Results 221 to 230 of about 26,347,914 (268)
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Formation of Carotene in vitro
Nature, 1960RESULTS presented in this communication indicate that both β-hydroxy β-methylglutarate and mevalonate may be considered precursors of carotene formation in an in vitro extract obtained from mycelial mats of the mould Phycomyces blakesleeanus. This extract, capable of synthesizing carotene, can also be used for establishing the existence of a back ...
H, YOKOYAMA +2 more
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Toxicology, 1985
The safety of beta-carotene, a widely distributed food colorant was assessed in tests with cells and in sub-chronic and chronic experiments with animals. Mutagenicity evaluations which included the standard Ames test and the micro-nucleus test of bone marrow cells from mice showed that beta-carotene exerted no mutagenic properties.
R, Heywood +3 more
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The safety of beta-carotene, a widely distributed food colorant was assessed in tests with cells and in sub-chronic and chronic experiments with animals. Mutagenicity evaluations which included the standard Ames test and the micro-nucleus test of bone marrow cells from mice showed that beta-carotene exerted no mutagenic properties.
R, Heywood +3 more
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2001
Considered to be an effective antioxidant, beta-carotene, a carotenoid that occurs naturally in many vegetables and fruits and that converts to vitamin A in the body, has been the subject of intensive cancer prevention research for decades,1; and is a commonly found supplement on the shelves of most supermarkets.
P, Greenwald, S S, McDonald
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Considered to be an effective antioxidant, beta-carotene, a carotenoid that occurs naturally in many vegetables and fruits and that converts to vitamin A in the body, has been the subject of intensive cancer prevention research for decades,1; and is a commonly found supplement on the shelves of most supermarkets.
P, Greenwald, S S, McDonald
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ζ-Carotene and other carotenes in a Phycomyces mutant
Phytochemistry, 1987Abstract Strain S442, a new mutant of the fungus Phycomyces blakesleeanus , has a greenish colour and a distinct green fluorescence under long-UV light. Carotene analyses reveal the presence of phytoene, ζ-carotene, phytofluene, an unidentified compound, and neurosporene (in descending order of abundance).
E.R. Bejarano +2 more
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Blood carotene and steatorrhea
The American Journal of Digestive Diseases, 1957A screening test has been presented for the early diagnosis of the malabsorptive syndromes. The test is based on the simple, rapid determination of the plasma carotene level, which is often found to be low in cases of malabsorption of fat.
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European journal of clinical nutrition, 1996
Beta-carotene has been shown to exhibit a good radical-trapping antioxidant activity in vitro. We were interested to see if dietary beta-carotene in combination with various intake levels for vitamin A would also inhibit lipid peroxidation.Sixty male Wistar rats received vitamin A (as retinyl palmitate) for 14 weeks in the diet (40,000, 4000 and 400 IU/
Bast, A. +3 more
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Beta-carotene has been shown to exhibit a good radical-trapping antioxidant activity in vitro. We were interested to see if dietary beta-carotene in combination with various intake levels for vitamin A would also inhibit lipid peroxidation.Sixty male Wistar rats received vitamin A (as retinyl palmitate) for 14 weeks in the diet (40,000, 4000 and 400 IU/
Bast, A. +3 more
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The Conversion of Carotene Into Vitamin A
Nature, 1946THE conversion of p-carotene into vitamin A which occurs in is represented in many standard works by means of the hydrolysis equation:
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JAMA: The Journal of the American Medical Association, 1972
To the Editor.— The report on the value of the carotene absorption test as a measure of malabsorption and consequent steatorrhea by Onstad and Zieve that appeared inThe Journal(221:677, 1972) was a most welcome reminder of a useful but neglected procedure.
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To the Editor.— The report on the value of the carotene absorption test as a measure of malabsorption and consequent steatorrhea by Onstad and Zieve that appeared inThe Journal(221:677, 1972) was a most welcome reminder of a useful but neglected procedure.
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Biotechnology Advances in β-Carotene Production by Microorganisms
Trends in Food Science and Technology, 2021Xiangzhao Mao
exaly