Akio Yanagida

TL;DR: Results suggest that ACT affected early signal transduction including the calcium influx as well as the release of histamine from rat basophilic leukemia (RBL-2H3) cells stimulated by the antigen-stimulation.

TL;DR: Molecular size information for polymerized catechin larger than the decamer in unripe apple was obtained by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and by fast-atom bombardment mass spectromaetry.

TL;DR: High-speed counter-current chromatography (HSCCC) using the type-J coil planet centrifuge was applied to compositional analysis of tea catechins and separation of other food-related polyphenols, providing useful information about the hydrophobic diversity of these bioactivepolyphenols present in various types of teas and food products.

TL;DR: Oligomeric constituents of apple procyanidins were fractionated by size-exclusion chromatography using a TSKgel Toyopearl HW-40F column using a mobile phase of acetone-8 M urea for time-of-flight mass spectrometry and reversed-phase high-performance liquid chromatography.

TL;DR: Data reveal that two effects, i.e. hydrogen bonding between the carbamoyl terminal on the column and the hydroxyl group of solute oligomer and hydrophilicity based on the high-order structure of oligomeric PAs, corporately contribute to the separation, but the hydrogen bonding effect is predominant in the authors' HILIC separation mode.