vicinal


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vicinal

[′vis·ən·əl]
(organic chemistry)
Referring to neighboring or adjoining positions on a carbon structure (ring or chain).
References in periodicals archive ?
Em imagens de baixa resolucao espacial (20 ou 30 m), a largura de estrada vicinal e muito estreita, podendo ser representada por um pixel apenas, o que possibilita o uso de menores valores para R.
These mechanisms may act independently or together, and include an imbalance of damage (As) and repair (Zn); a protective effect of Zn on endothelial membranes and against actions of cytokines; decreased levels or activities of glutathione, glutathione S-transferase and superoxide dismutase; indirect competition of As with Zn in proteins containing vicinal dithiols (e.
Evidence for vicinal thiols and their functional role in glucosamine-6-phosphate deaminase from Escherichia coli.
In the former, the olefin is reversed as it enters the chain and leads to a structure where vicinal carbon atoms each contain a methyl group.
Sharpless also reported the first catalytic asymmetric cis dihydroxylation of olefins, the conversion of an olefin to vicinal diol present in many natural products and unnatural molecules.
Greg Casey, of Anheuser-Busch's corporate research and development, used Cadoe to determine the influence of wort amino acid levels on vicinal diketone (VDK) production in lager fermentations.
Contractor address : Chemin Vicinal de la Milliere a Saint-Menet
It is well established that the oxidation predominantly begins by abstracting a hydrogen atom from the methylene group vicinal to the nitrogen of amide group, followed by scission of alkyl-amide N-C or vicinal C-C bond [6-10], However, secondary processes related to azomethine formation can take place as well, leading to the development of branched or even crosslinked structures [6, 11].
In fact, dihydroxylated coumarins, such as fraxetin, esculetin and daphnetin, are potent antioxidant compounds that act by different mechanisms, and these effects are related to the vicinal diol functionality in promoting ROS scavenging activity of coumarins (Hoult and Paya, 1996).
Among the topics are enantioselective annulations with chiral N-mesityl N-heterocyclic carbenes, the construction of anti-Me-OH vicinal relationships in polyketides, asymmetric catalysis in the total synthesis of lipids and polyketides, hetercycle construction via asymmetric rhodium-catalyzed cylcoadditions, and dynamic kinetic asymmetric transformations involving carbon-carbon bond cleavage.
Total structure characterization of unsaturated acidic phospholipids provided by vicinal di-hydroxylation of fatty acid double bonds and negative electrospray ionization mass spectrometry.