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The presence of glucose, mannose and glucuronic acid and the absence of rhamnose in all the samples were verified (Figure 3).
Three suspected metabolites of ziram were detected (dithiocarbamic acid conjugated or not to sulfate or glucuronic acid), but these nonspecific structures were also detected in urine of nonexposed mice.
Each peak was separated as described as 1: [alpha]-L-rhamnose, 2: L-arabinose, 3: galactose, 4: glucose, 5: mannose, 6: fructose, 7: galacturonic acid, and 8: glucuronic acid.
Glucuronic acid was not detected, probably of its very low levels (<3%) and the sensitivity of the method.
Dutton, Glucuronic Acid Free and Combined: Chemistry, Biochemistry, Pharmacology, and Medicine, Academic Press Inc., New York, New York, USA, 1966.
Spectrum allows us to demonstrate the possible bonds between HA and the metal, which are concentrated around the metal-oxygen groups of hyaluronate (a monomer unit that interacts with metals) and the carbonyl of the glucuronic acid group, which displaces the band.
HA is a non-branched linear polysaccharide comprised of several units of glucuronic acid disaccharides and Nacetylglucosamine (Brandt et al.; Kim et al.).
Melatonin is degraded to 6-hydroxymelatonin in the liver10, conjugated with sulfuric or glucuronic acid and eliminated in the urine as 6-sulfatoxy-melatonin11.
Xylose residues may also be substituted with glucuronic acid and/or methylglucuronic acid linkages [13].
[54] showed the presence of anthraquinone 38, triterpenoids oleanolic acid 39, diosgenin 40, rhamnose 41, glucuronic acid 42, and arabinose 43.
Li and coworkers purified a novel 16kDa polysaccharide-peptide complex from Pleurotus abalones with the monosaccharide composition characterized as glucose, rhamnose, glucuronic acid, and galactose in the molar ratio of 22.4 : 1 : 1.7 : 1.6.
Uridine diphosphate glucuronic acid (UDPGA), magnesium chloride (Mg[Cl.sub.2]), alamethicin, D-saccharic-1, and 4-lactone were provided from Sigma-Aldrich (St.