The phenolic profile of Amazon grape fruit (Pourouma cecropiifolia Martius) was investigated by high-performance liquid chromatography-electrospray ionization mass spectrometry (HPLC-ESI-MS/MS). For this purpose, suitable extraction and liquid chromatographic methods were developed. Anthocyanins, flavonols and chlorogenic acids were found mainly in the peel. Besides the main anthocyanins, i.e. ...

BACKGROUND: We completed a study over a 200-day period examining the stability of limonin glucoside formulated into three beverage matrices. RESULTS: Beverages containing limonin glucoside were found to contain limonin (0.13–20.10 mg L−1) during their initial testing; however, these concentrations were directly attributable to the presence of contaminating limonin in the particular lot of limon...

The presence of a specific binding site for a hepta-beta-glucoside elicitor of phytoalexin accumulation has been demonstrated in soybean microsomal membranes. A tyramine conjugate of the elicitor-active hepta-beta-glucoside was prepared and radiolabeled with 125I. The labeled hepta-beta-glucoside-tyramine conjugate was used as a ligand in binding assays with a total membrane fraction prepared f...

PURPOSE To investigate UV filter synthesis in the human lens, in particular the biosynthetic origin of the second most abundant UV filter compound, 4-(2-amino-3-hydroxyphenyl)-4-oxobutanoic acid O-beta-D-glucoside. METHODS Human lenses were analyzed by high-performance liquid chromatography (HPLC) after separate incubation with 3H-tryptophan (3H-Trp), beta-benzoylacrylic acid, D,L-alpha-amino...

From the water-soluble portion of the methanol extract of the fruit of Glehnia littoralis Fr. SCHMIDT ex MIQ. (Umbelliferae; "hamabofu" in Japanese), thirty compounds, including three new monoterpenoids and a new monoterpenoid glucoside, a new benzofuran glucoside, a new alkyl glucoside, and a new glucide, were obtained. Their structures were clarified by spectral investigation.

the bioactivity of chemical extracts from silverleaf nightshade solanum elaeagnifolium cav. seeds and leaves were tested for herbicidal activities, through water and ethanol extracts, against portulaca oleracea l., corchorus olitorius l., convolvulus arvensis l.and echinochloa crus-galli (l.) found in most zea mays l.fields. characterization of the isolated constituents from ethanol extract was...

Twenty three samples of 18 Portuguese olive leaf cultivars were analysed by a reversed-phase HPLC/DAD procedure and eight flavonoidic compounds were identified and quantified (luteolin 7,4'-O-diglucoside, luteolin 7-O-glucoside, rutin, apigenin 7-O-rutinoside, luteolin 4'-O-glucoside, luteolin, apigenin and diosmetin). Luteolin 7,4'-O-diglucoside and luteolin 4'-O-glucoside were identified by H...

The detailed investigation of a methanolic extract of aerial parts of Achillea nobilis resulted in the isolation of 10 flavonoids. A new C-glycosylflavone, luteolin-6-C-apiofuranosyl-(1'''-->2'')-glucoside, was isolated besides orientin, isoorientin, vitexin, isoschaftoside, luteolin-7-O-beta-glucuronide, luteolin-4'-O-beta-glucoside and quercetin-3-O-methyl ether and two rare flavonolglycoside...

Intact pyridoxine glucoside showed about 20% of microbiological activity of equivalent mole of pyridoxine for Saccharomyces carlsbergensis 4228 ATCC 9080. The activity was gradually increased accompanied with the prolonged incubation. It seems that pyridoxine glucoside is hydrolyzed to pyridoxine and glucose by a-glucosidase of Saccharomyces carlsbergensis 4228 ATCC 9080 and can be bioassayed a...