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Facile discrimination of aldose enantiomers by reversed-phase HPLC.
The reaction was applied to the determination of absolute configuration the sugar residues of an aroma precursor and direct HPLC analysis of the reaction mixture and UV detection at 250 nm discriminated D- and L-enantiomers of aldoses. Expand
Antimicrobial activity of 10 different plant polyphenols against bacteria causing food-borne disease.
The relatively lower mean MIC values of 1, 2, 5, and 6 suggest the importance of 3,4,5-trihydroxyphenyl groups in antibacterial activity. Expand
The use of microfluorometric method for activity-guided isolation of antiplasmodial compound from plant extracts
In vitro antiplasmodial activity of methanolic extracts of 16 medicinal plants was evaluated by fluorometric assay using PicoGreen and adverse effects manifest in a concentration-dependent fashion. Expand
Antibacterial spectrum of plant polyphenols and extracts depending upon hydroxyphenyl structure.
The relationship between the structure and antibacterial activity of 22 polyphenols was analyzed by using minimum inhibitory concentration (MIC) as a criterion against 26 species of bacteria whichExpand
Trypanocidal activity of extracts and compounds from the stem bark of Anogeissus leiocarpus and Terminalia avicennoides
Effect of the compounds on fibroblasts did not reveal serious toxicity at moderate concentration but is concentration dependent, and hydrolysable tannins with a range of activity were revealed. Expand
Chemistry of Secondary Polyphenols Produced during Processing of Tea and Selected Foods
This review will discuss recent progress in the chemistry of secondary polyphenols produced during food processing. The production mechanism of the secondary polyphenols in black tea, whisky,Expand
Phyllanemblinins A-F, new ellagitannins from Phyllanthus emblica.
Six new ellagitannins, phyllanemblinins A-F (1-6), were isolated from Phyllanthus emblica, along with 30 known tannins and related compounds. Their structures were determined by spectral and chemicalExpand
α-Amylase and lipase inhibitory activity and structural characterization of acacia bark proanthocyanidins.
The bark extract of Acacia mearnsii showed strong lipase and α-amylase inhibition activities and a modified thiol degradation method using strongly acidic conditions was applied to the extract to yield threeThiol degradation products derived from robinetinidol units. Expand
Three diarylheptanoids from Rhoiptelea chiliantha
Three new diarylheptanoids, rhoiptelols A, B and C, were isolated from the leaves and fruits of Rhoiptelea chiliantha. Their structures including absolute configurations were elucidated on the basisExpand
A new catechin oxidation product and polymeric polyphenols of post-fermented tea.
A new epicatechin oxidation product with a 3,6-dihydro-6-oxo-2H-pyran-2-carboxylic acid moiety was isolated from a commercially available post-fermented tea that is produced by microbial fermentationExpand