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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.
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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.
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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 which…
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Inhibitory activities of proanthocyanidins from persimmon against oxidative stress and digestive enzymes related to diabetes.

Oligomers rather than polymers from proanthocyanidins of persimmon peel may be expected to be a more promising antioxidative and antidiabetic agent in relation to utilization in biological systems and their inhibitory activities on digestive enzymes and advanced glycation endproduct (AGE) formation were evaluated.
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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.
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α-Glucosidase Inhibitory Profile of Catechins and Theaflavins

It is demonstrated for the first time that TF-3-O-Gal can suppress glucose production from maltose through inhibition of AGH in the gut through the effects of catechins and theaflavins against alpha-glucosidase.
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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,…
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Procyanidins and butanol extract of Cinnamomi Cortex inhibit SARS-CoV infection

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A new catechin oxidation product and polymeric polyphenols of post-fermented tea.

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Tannins and related compounds. XL: Revision of the structures of punicalin and punicalagin, and isolation and characterization of 2-O-galloylpunicalin from the bark of Punica granatum L.

The structures of punicalin and punicalagin, isolated from the bark of Punica granatum L. (pomegranate), have been revised to 4, 6-(S, S)-gallagyl-D-glucose (1) and 2, 3-(S)-hexahydroxy-diphenoyl-4,…
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