Results 41 to 50 of about 47,648 (179)

Identification of Indicators for Preterm Birth Using Retinoid Metabolites

open access: yesMetabolites, 2021
Metabolites reflect the biochemical dynamics for the maintenance of pregnancy and parturition. UPLC-Q/TOF-MS and LC-MS/MS metabolomics were performed to identify and validate the plasma metabolomic signatures of preterm birth (PTB). We recruited pregnant
Young-Ah You   +9 more
doaj   +1 more source

High dietary vitamin A interferes with tissue α-tocopherol concentrations in fattening pigs: a study that examines administration and withdrawal times

open access: yesAnimal, 2009
This study aimed to assess the interaction between different dietary vitamin A (dVitA) levels and the same concentration of vitamin E (100 IU all-rac-α-tocopheryl acetate/kg feed) in growing-finishing pigs.
A. Olivares   +3 more
doaj   +1 more source

Acyl CoA:retinol acyltransferase in rat small intestine: its activity and some properties of the enzymic reaction.

open access: yesJournal of Lipid Research, 1982
The present study was conducted to examine whether the intestinal esterification of retinol could be due to a microsomal acyl-CoA transferase. When the 'microsomal fraction' of rat mucosa was incubated with [3H]retinol and palmitoyl-CoA or oleoyl-CoA ...
P Helgerud, L B Petersen, K R Norum
doaj   +1 more source

Decreases in retinol and retinol-binding protein during total parenteral nutrition in rats are not due to a vitamin A deficiency

open access: yesJournal of Lipid Research, 1996
Perfusion feeding in rats induced a decrease in circulating retinol despite an adequate supply of vitamin A. We studied the effect of total parenteral nutrition (TPN) on the retinol specific carrier in rat, analyzing holo-RBP (bound to retinol) and apo ...
A Lespine   +7 more
doaj   +1 more source

Plasma kinetics of vitamin A in humans after a single oral dose of [8,9,19-13C]retinyl palmitate

open access: yesJournal of Lipid Research, 1996
The kinetics of vitamin A and its major metabolites were investigated in humans. Eleven healthy male subjects ingested 105 mumol (100,000 IU) of [8,9,19-13C]retinyl palmitate in an oily solution.
D V Reinersdorff, E Bush, D J Liberato
doaj   +1 more source

Unusual properties of retinyl palmitate hydrolase activity in rat liver.

open access: yesJournal of Lipid Research, 1979
These studies report the hydrolysis of retinyl palmitate with liver homogenates and homogenate fractions from retinol-depleted rats. The studies utilized an effective in vitro assay for retinyl palmitate hydrolase (RPH) activity, in which microgram ...
E H Harrison, J E Smith, D S Goodman
doaj   +1 more source

Accumulation of retinol in the liver after prolonged hyporetinolemia in the vitamin A-sufficient rat

open access: yesJournal of Lipid Research, 2005
We assessed the effects of prolonged reduction of plasma retinol concentrations (hyporetinolemia) on the distribution of tissue vitamin A (VA) and of its active compounds using a model of continuous recombinant human interleukin-6 (rhIL-6) infusion via ...
Sin H. Gieng   +2 more
doaj   +1 more source

Simultaneous measurement of serum probucol and lipid-soluble antioxidants.

open access: yesJournal of Lipid Research, 1992
A method is described for the simultaneous measurement of probucol, retinol, tocopherols, lycopene, and carotenes by reverse phase high performance liquid chromatography.
L Schäfer Elinder, G Walldius
doaj   +1 more source

Simultaneous Quantification of Vitamin A and Derivatives in Cosmetic Products by Liquid Chromatography with Ultraviolet Detection

open access: yesSeparations, 2022
Vitamin A (retinol) and some of its derivatives are a group of fat-soluble compounds used in cosmetic products as bioactive ingredients. Therefore, it is necessary to perform the quality control of final product to ensure their efficacy and safety.
Víctor Vállez-Gomis   +5 more
doaj   +1 more source

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