Home About us Contact
|
Home About us Contact | ||
|
|
||
Red Bean (red + bean)
Selected AbstractsAntioxidative Activity and Safety of 50% Ethanolic Red Bean Extract (Phaseolus radiatus L. var. Aurea)JOURNAL OF FOOD SCIENCE, Issue 1 2003S.-T. Chou ABSTRACT: This study evaluated the antioxidative activities of 50% ethanolic extract from red bean (Phaseolus radiatus L. var. Aurea). The antioxidative activities, including ,,,-diphenyl-,-picryl-hydrazyl (DPPH) radicals scavenging effects, Fe2+ -chelating ability, and reducing power, were studied in vitro. The antioxidative activity was found to increase with the concentration of the extract to a certain extent and then level off as the concentration further increased. Compared with commercial antioxidants, the red bean extract showed less scavenging effect on the DPPH radical and less reducing power than ,-Tocopherol and BHT, but better Fe2+ -chelating ability. No mutagenic effect toward any tester strains was found in the 50% ethanolic extract of red bean. [source] Characterisation of a haemagglutinin from Hokkaido red bean (Phaseolus vulgaris cv. Hokkaido red bean)JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, Issue 1 2010Jack H Wong Abstract BACKGROUND: A haemagglutinin was purified from Japanese Hokkaido red beans (Phaseolus vulgaris cv. Hokkaido red bean) with a procedure that included three chromatographic media. RESULTS: Haemagglutinating activity was adsorbed on DEAE cellulose, Affi-gel blue gel and Mono S. The pure haemagglutinin was a homodimer and each subunit was around 30 kDa in molecular mass. The haemagglutinating activity of this agglutinin could not be inhibited by a variety of simple sugars at 200 mmol L,1 concentration including ,- L -fucose, D(+)-galactose, D(+)-glucose, D(+)-glucosamine, D(,)galactosamine, galacturonic acid, (+)-lactose, D(+)-melibose, L(,)-mannose, D(+)-mannose, D -mannosamine, D(+)-raffinose, L -rhamnose, (+)-xylose and galacturonic acid. The haemagglutinating activity was fully retained at pH 4,11 and at 0,80 °C, but was completely lost at extreme pH values (0,2 and 13,14) and at very high temperatures (90 °C and 100 °C). The haemagglutinin exhibited a weak mitogenic activity toward mouse splenocytes, a stronger anti-proliferative activity than Con A toward HepG2 (human hepatoma) cells and inhibited >80% of HIV-1 reverse transcriptase inhibitory activity at 3.3 µmol L,1. It was devoid of anti-fungal activity. CONCLUSION: Hokkaido red bean haemagglutinin possesses a potent anti-proliferative effect on HepG2 cells. Copyright © 2009 Society of Chemical Industry [source] | ||||||||||