Results 101 to 110 of about 980 (152)
Some of the next articles are maybe not open access.
Aromaticity of caffeine, xanthine and the dimethyl xanthines
Tetrahedron Letters, 2014Xanthine, caffeine and three isomeric dimethyl xanthines (theobromine, theophylline and paraxanthine) are often described as aromatic on various criteria. Here we complete the picture by assessing these molecules for aromaticity on the ring-current criterion.
Christopher M. Gibson, Patrick W. Fowler
openaire +1 more source
Palladium compounds of xanthine and xanthine derivatives
Inorganica Chimica Acta, 1983The biological importance of purine bases is well known. The interaction of metal ions with nucleic acids, nucleotides and nucleotides has been an active area of inorganic and structural chemistry during the last few years, and a number of recent reviews exist on the subject [1, 2].
E. Colacio +4 more
openaire +1 more source
[Xanthine oxidase (xanthine dehydrogenase)].
Nihon rinsho. Japanese journal of clinical medicine, 1997Xanthine oxidase (xanthine dehydrogenase) is composed of two identical subunits of approximately 150,000 daltons. Each subunit contains four oxdation-reduction active cofactors/monomers. In vivo, the enzyme exists mostly as the dehydrogenase type (the NAD-dependent type).
S, Sumi, Y, Wada
openaire +1 more source
Regulation of xanthine dehydrogenase and xanthine oxidase activity by hypoxia
American Journal of Physiology-Lung Cellular and Molecular Physiology, 1996The present study determined the effect of hypoxia on xanthine dehydrogenase (XDH) and xanthine oxidase (XO) activity and gene and protein expression in cultured bovine aortic endothelial cells (BAEC). BAEC were exposed to hypoxia (3% O2) or anoxia (0% O2) for 24 or 48 h and to 24 h of hypoxia followed by 24 h of reoxygenation.
W B, Poss +4 more
openaire +2 more sources
Tautomerism of xanthine and alloxanthine: A model for substrate recognition by xanthine oxidase
Journal of Computer-Aided Molecular Design, 1996Tautomerism of neutral xanthine and alloxanthine has been examined both in the gas phase and in aqueous solution. The tautomeric preference in the gas phase has been studied by means of semiempirical and ab initio quantum-mechanical computations with inclusion of correlation effects at the Møller-Plesset level, and from density-functional calculations.
Begoña Hernández +2 more
openaire +2 more sources
Ischaemic Brain Oedema and Xanthine-Xanthine Oxidase System
1990The formation of oxygen-derived free radicals in cerebral ischaemia has been implicated in altering the BBB permeability, cause oedema and tissue damage. However little attention has been paid regarding the involvement of xanthine oxidase in the cerebral ischaemic events.
Y, Kinuta, H, Kikuchi, M, Ishikawa
openaire +2 more sources
Xanthine Oxidoreductase: One Enzyme for Multiple Physiological Tasks
Redox Biology, 2021Maria Giulia Battelli +2 more
exaly
New Insights Into Purine Metabolism in Metabolic Diseases: Role of Xanthine Oxidoreductase Activity
American Journal of Physiology - Endocrinology and Metabolism, 2020Masato Furuhashi
exaly