Results 251 to 260 of about 74,162 (293)

α-Tocopherol Pro-Vitamins: Synthesis, Hydrolysis and Accumulation in Rabbit Ear Skin

Journal of Controlled Release, 2004
We synthesized esters of alpha-tocopherol (VE) with the aim to develop new pro-vitamins, easily reconverted by enzymes in the skin and able to release another active moiety such as an amino acid, in order to obtain a synergic effect. In particular, the attention was dedicated to the amino acids glycine and alanine and to pyroglutamic acid.
Sara Nicoli, Patrizia Santi, Fabio Marra
exaly   +7 more sources

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Effects of amaranth addition on the pro‐vitamin A content, and physical and antioxidant properties of extruded pro‐vitamin A‐biofortified maize snacks

Journal of the Science of Food and Agriculture, 2015
Abstract BACKGROUND Pro‐vitamin A‐biofortified maize snacks with added leafy vegetable may have a potential as nutritious and health‐promoting products, especially in addressing vitamin A deficiency, which is prevalent in developing regions.
Daniso, Beswa, Nomusa R, Dlamini, Eric O, Amonsou, Muthulisi, Siwela, John, Derera   +4 more
openaire   +2 more sources

Bioaccessibility of Pro-Vitamin A Carotenoids Is Minimally Affected by Non Pro-Vitamin A Xanthophylls in Maize (Zea mays sp.)

Journal of Agricultural and Food Chemistry, 2008
The absorption of some carotenoids has been reported to be decreased by coingestion of relatively high concentrations of other carotenoids. It is unclear if such interactions occur among carotenoids during the digestion of plant foods. Current varieties of maize contain limited amounts of the pro-vitamin A (pro-VA) carotenoids beta-carotene (BC) and ...
Sagar K, Thakkar, Mark L, Failla
openaire   +2 more sources

Plasma fibrinogen, fibrinolysis and (pro)vitamins; Is there a connection?

Fibrinolysis, 1995
Summary Objective: To investigate whether the relationship between anti-oxidant vitamins and cardiovascular disease can be mediated by influencing haemostasis or fibrinolysis. Design: Cross-sectional population study. Setting: Population screening in the northern Sweden MONICA study. Material: 102 men aged 40–49 years, randomly selected.
M. Eliasson, K. Asplund, P.-E. Evrin, F. Huhtasaari, I. Johansson   +4 more
openaire   +1 more source

Non-Pro-Vitamin A and Pro-Vitamin A Carotenoids in Atopy Development

International Archives of Allergy and Immunology, 2013
Carotenoids are important derivatives of the human diet and occur in high concentrations in the human organism. Various carotenoids are also present in human breast milk and are transferred to breast-fed children. The alternative to breastfeeding is supplementation with an infant milk formula, but these formulas contain only a limited variety of ...
openaire   +2 more sources

Facile and selective metalation of 7-dehydro-cholesterol (pro-vitamin D3)

Tetrahedron Letters, 1984
Abstract Subsequent treatment of 7-dehydrocholesterol with trimethylsilylmethylpotassium in tetrahydrofuran, dry ice, mineral acid and diazomethane gives a regioisomerically pure, homoconjugated ester as a diastereomeric mixture, the minor component of which turns out to be thermodynamically more stable than a conjugated isomer.
Moret, Etienne, Schlosser, Manfred
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The Bioavailability of (pro) Vitamin A Carotenoids and Maximizing the Contribution of Homestead Food Production to Combating Vitamin A Deficiency

International Journal for Vitamin and Nutrition Research, 2007
An estimated 100–140 million children worldwide suffer vitamin A deficiency disorders (VADD). Strategies for combating VADD are best used in combination because they serve particular target groups and none has full coverage. Homestead food production (HFP) can contribute to combating vitamin A deficiency directly, by increasing intake of vitamin A ...
de Pee, S., Bloem, M.W.
openaire   +2 more sources

Improving the nutritional value of Golden Rice through increased pro-vitamin A content

Nature Biotechnology, 2005
"Golden Rice" is a variety of rice engineered to produce beta-carotene (pro-vitamin A) to help combat vitamin A deficiency, and it has been predicted that its contribution to alleviating vitamin A deficiency would be substantially improved through even higher beta-carotene content. We hypothesized that the daffodil gene encoding phytoene synthase (psy),
Jacqueline A, Paine, Catherine A, Shipton, Sunandha, Chaggar, Rhian M, Howells, Mike J, Kennedy, Gareth, Vernon, Susan Y, Wright, Edward, Hinchliffe, Jessica L, Adams, Aron L, Silverstone, Rachel, Drake   +10 more
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Quinones as reagents for the dehydrogenation of cholesteryl acetate to pro‐vitamin D

Recueil des Travaux Chimiques des Pays-Bas, 1940
Abstract1,4‐Quinones, when heated with cholesteryl acetate in sealed tubes at 120 to 135° for 6 to 8 hours, were found to partially dehydrogenate the sterol ester to a pro‐vitamin D (probably 7‐dehydro‐cholesteryl acetate). The crude products, after the removal of hydroquinones, quinhydrones and unreacted quinones, were irradiated for 4 hours with ...
openaire   +1 more source

Regulation von Immunsystem und Allergien. Retinoide, Vitamin A und Pro‐Vitamin‐A‐Carotinoide

Pharmazie in unserer Zeit, 2009
AbstractVitamin A und Pro‐Vitamin‐A‐Carotinoide sind in hohen Konzentrationen in der westlichen Ernährung enthalten. Eine humane Vitamin‐A‐Defizienz kommt in westlichen Ländern daher extrem selten vor. Eine Überversorgung mit Vitamin A tritt jedoch häufig auf und kann möglicherweise ein wesentlicher Faktor bei der gesteigerten Prävalenz von atopischen ...
openaire   +1 more source