Results 301 to 310 of about 143,165 (330)
Some of the next articles are maybe not open access.
Quinones and quinone-methides—I
Tetrahedron, 1977Abstract Silver oxide or 2,3-dichloro-5,6-dicyanobenzoquinone oxidation of 2-cinnamyl-4,5-methylenedioxyphenol yields a crystalline ortho-quinone methide, which undergoes thermal or acid-catalysed cyclization to 6,7-methylene-dioxyflav-3-ene. Oxidation of 2-(4-methoxybenzyl)-4,5-methylenedioxyphenol yields a crystalline ortho-quinone methide which ...
openaire +2 more sources
Photochemical additions of aldehydes to quinones, quinone imines and quinone oximes
1968Klinger [1,2] found that 9,10-phenanthrenequinone reacted with aliphatic and aromatic saturated and unsaturated aldehydes e.g. acetaldehyde, benzaldehyde, and cinnamaldehyde under the influence of light. The photo-adducts 1 may be cleaved hydrolytically to give 9,10-phenanthrenediol and RCOOH; it is possible thus to convert aldehydes to the ...
openaire +2 more sources
The Cofactor Pyrroloquinoline Quinone
Annual Review of Nutrition, 1990Article de synthese sur un cofacteur: la pyrroloquinoleine quinone. Etude de ses proprietes; caracteristiques, formes moleculaires, stabilite. Identification et analyse quantitative des formes libres, derivees et liees par liaison covalente. Distribution chez les procaryotes, les eucaryotes, les aliments et les boissons.
R. A. van der Meer +2 more
openaire +3 more sources
Function of Quinones in Photosynthesis
1967Publisher Summary The quinones that are commonly found localized in chloroplasts are of three major types: the plastoquinones, tocopherylquinones, and vitamin K. In each of these groups, there is more than one type present. Plastoquinone A has a side chain with nine monounsaturated isopentenyl (isoprenoid) units.
M.D. Henninger, Frederick L. Crane
openaire +3 more sources
Journal of the Chemical Society, Perkin Transactions 1, 1999
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
openaire +3 more sources
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
openaire +3 more sources
Acetylenic derivatives of quinones
Russian Chemical Reviews, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Lidiya G. Fedenok +2 more
openaire +2 more sources
1990
The concept that the long-chain quinones in energy-transducing membranes (Fig. 5.1 A and B) act as mobile carriers of electrons and protons is partly based on the high concentration of quinone in all energy-transducing membranes (Table 5.1). This quinone can be readily extracted with organic solvent.
David B. Knaff, William A. Cramer
openaire +2 more sources
The concept that the long-chain quinones in energy-transducing membranes (Fig. 5.1 A and B) act as mobile carriers of electrons and protons is partly based on the high concentration of quinone in all energy-transducing membranes (Table 5.1). This quinone can be readily extracted with organic solvent.
David B. Knaff, William A. Cramer
openaire +2 more sources
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1968
Martin D. Kamen, J. Maroc, H. De Klerk
openaire +3 more sources
Martin D. Kamen, J. Maroc, H. De Klerk
openaire +3 more sources
Biotechnology and biosynthesis of quinones
Pharmaceutisch Weekblad, 1991Nowadays, it is generally agreed that intensive investigation of biosynthetic pathways is a prerequisite for attaining industrial-scale production of secondary metabolites (e.g. quinones) by plant cell cultures. Literature data are presented to illustrate different aspects of today's quinone biosynthesis research.
openaire +3 more sources