Results 151 to 160 of about 49,090 (200)
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13-cis-Beta,beta-carotene and 15-cis-beta,beta-carotene.
Acta crystallographica. Section C, Crystal structure communications, 200813-cis-Beta,beta-carotene, C(40)H(56), crystallizes with a complete molecule in the asymmetric unit, whereas 15-cis-beta,beta-carotene, also C(40)H(56), has twofold symmetry about an axis through the central bond of the polyene chain. The polyene methyl groups are arranged on one side of the polyene chains for each molecule and the 6-s-cis beta end ...
Giuditta, Bartalucci +4 more
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Medical Hypotheses, 1997
An hypothesis is presented that is opposed to the conventional viewpoint that beta-carotene is an in vivo free-radical scavenger. It is suggested that there are biochemical reasons why beta-carotene, other carotenoids, and especially their metabolites may be harmful to mammalian systems.
D V, Crabtree, A J, Adler
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An hypothesis is presented that is opposed to the conventional viewpoint that beta-carotene is an in vivo free-radical scavenger. It is suggested that there are biochemical reasons why beta-carotene, other carotenoids, and especially their metabolites may be harmful to mammalian systems.
D V, Crabtree, A J, Adler
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Beta-Carotene: Thermal Degradation
Science, 1964Thermal treatment of crystalline β-carotene (240°C in a vacuum) results in the formation of a volatile fraction containing chiefly aromatic hydrocarbons such as toluene, m - and p -xylene, 2,6-dimethylnaphthalene, and ionene.
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Serum beta-carotene before and after beta-carotene supplementation.
European journal of clinical nutrition, 1992A two-month double-blind, placebo-controlled supplementation study of oral beta-carotene (20 mg daily) was conducted. Two hundred and twenty two 30-69 year old men were randomized into either a beta-carotene or placebo group, and serum samples were obtained at baseline, follow-up (2 months), and up to 12 weeks post-supplementation.
D, Albanes +6 more
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1991
An infant is brought to the visiting American physician. She has seen children like this before and is not surprised when the interpreter tells her that the baby is sick and doesn’t open his eyes. A quick examination confirms her fears: the child is blind; behind his closed lids the corneas have dissolved into a shapeless jelly.
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An infant is brought to the visiting American physician. She has seen children like this before and is not surprised when the interpreter tells her that the baby is sick and doesn’t open his eyes. A quick examination confirms her fears: the child is blind; behind his closed lids the corneas have dissolved into a shapeless jelly.
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Factors affecting production of beta-carotene from Dunaliella salina microalgae
Biocatalysis and Agricultural Biotechnology, 2020Abooali Golzary +2 more
exaly