Results 191 to 200 of about 37,733 (224)

Semiconductor photoinduced isomerization of retinol acetate and retinol

Journal of Photochemistry and Photobiology A: Chemistry, 1993
Abstract Irradiation of the visible-light-absorbing semiconductors CdSe and CdS suspended in organic solvents in the presence of retinol and retinol acetate catalysed cis—trans isomerization in retinoids selectively at trisubstituted double bonds.
A. Mahipal Reddy, V. Jayathirtha Rao, V. Raj Gopal   +2 more
openaire   +2 more sources

Reaction of Retinol with Peroxynitrite [PDF]

Bioscience, Biotechnology, and Biochemistry, 2007
The reactivity of retinol with peroxynitrite, which is a strong oxidant and has been reported to induce several biological damages, was investigated. 13-cis-14-nitroretinol (1), 13-trans-14-nitroretinol (2), 13-apo-beta-carotenone (3), retinal (4), 11,14-epoxyretinol (5), and 11,15-epoxyretinol (6) were identified as reaction products of retinol with ...
Rie Suzuki, Hideo Etoh, Yukimasa Terada, Takashi Maoka, Aditya Kulkarni, Yuya Yomoda, Hirokazu Kawagishi   +6 more
openaire   +2 more sources

Retinol esterification in Sertoli cells by lecithin-retinol acyltransferase

Biochemistry, 1989
Esterification of retinol occurs during the metabolism of vitamin A in the testis. An acyl-CoA:retinol acyltransferase (ARAT) activity has been described for microsomes isolated from testis homogenates. That activity was also observed here in microsomal preparations obtained from cultured Sertoli cells from 20-day-old (midpubertal) rats. ARAT catalyzed
Shingleton, Janet L, Skinner, Michael K, Ong, David E   +2 more
openaire   +4 more sources

Plasma Levels of Retinol in Cancer Patients Supplemented with Retinol

Oncology, 1987
Previous studies have indicated that plasma levels of retinol are decreased in some cancer patients and that lower levels of retinol could be associated with a poor response to chemotherapy. This pilot study was conducted to determine whether it is possible to increase plasma levels of retinol in cancer patients by supplementation with retinol.
R. Beaulieu, P. V. Bhat, J. Latreille, P. Couture, A. Lacroix, A. Karabatsos, M. Bourque   +6 more
openaire   +3 more sources

Vitamin A (Retinol) [PDF]

Zeitschrift für Orthomolekulare Medizin, 2019
ZusammenfassungVitamin A erfüllt in seinen 3 aktiven Formen Retinol, Retinal und Retinsäure zahlreiche physiologische Funktionen, u. a. bei Genexpression und Hirnentwicklung, im Immunsystem und beim Sehvorgang. Bei vielen Stoffwechselschritten wirkt es synergistisch mit Vitamin D. Es deutet sich an, dass mind.
openaire   +1 more source

Aspects of the Metabolism of Retinol-Binding Protein and Retinol

1975
Publisher Summary This chapter presents different aspects of the metabolism of retinol-binding protein (RBP) and retinol. RBP is not significantly decreased until the liver reserves of the vitamin are virtually abolished. The diminished concentration of RBP in plasma in manifest vitamin A deficiency reflects the impaired transport of retinol to the ...
Per A. Peterson, Lars Rask, Lars Östberg, Anders Vahlquist, S. Nilsson   +4 more
openaire   +3 more sources

Studies on the Cellular Uptake of Retinol Binding Protein and Retinol

Experimental Cell Research, 1999
The uptake and release of (125)I-RBP and of holoRBP labeled with [(3)H]retinol ((3)H-ROH) were studied in two cell lines which synthesize and secrete RBP, the HepG2 hepatocarcinoma cell line and the Caki-1 kidney adenocarcinoma cell line, and in HeLa cells that do not express the endogenous RBP gene. In all three cell lines a part of endocytosed (125)I-
Giovanni Levi, Francesca Tosetti, Francesco Campelli   +2 more
openaire   +3 more sources

Vitamin A (Retinol)

1993
Vitamin A ist in Supermarkten, Reformhausern, Apotheken und Drogerien rezeptfrei erhaltlich. Viele Laien halten Retinol fur gesundheitsfordernd. Fruher wurde Vitamin A (Retinol) als wirksames Medikament in der Aknetherapie gepriesen. Noch heute wird sein Nutzen von manchen Autoren hervorgehoben und die Substanz als adjuvante Therapie eingesetzt ...
Gerd Plewig, Albert M. Kligman
openaire   +2 more sources