A 2,2-diphenyl-1-picrylhydrazyl radical (DPPH˙) was successfully solubilised in water by β-cyclodextrin (β-CD). DPPH˙/β-CD thus obtained was demonstrated to be a powerful tool to evaluate the antioxidative activity of water-soluble antioxidants, such as ascorbate and Trolox, in aqueous buffer solutions.

Recombination zone and Förster resonance energy transfer (FRET) in multilayer organic light-emitting diodes (OLEDs) were investigated. Basis device architecture is indium tin oxide (ITO)/N, N0-diphenyl-N, N0-bis(1-naphthyl-phenyl)-1, 10-biphenyl-4, 40-diamine (NPB)/4-(dicyanomethylene)-2-tert-butyl-6-(1, 1, 7, 7tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB)/NPB (spacer)/tris-(8-hydroxyl quinolin...

AIM To investigate the antioxidant potential of two Allium cepa L. extracts. MATERIAL AND METHODS The antioxidant activity of the two extracts (encoded EC1 and EC2) was assessed using two methods: DPPH (2,2-diphenyl-1-picrylhydrazyl) scavenging capacity and determination of their reducing power; phytobiological, studies were performed using grains of Triticum aestivum L., Falmura variety. R...

BACKGROUND Sorghum possesses phenolic compounds that are health-promoting constituents of the grain. There are approximately 40 000 sorghum accessions, many of which have not been evaluated for the grain's health-promoting potential. Conventional methods for measuring total phenolic content, flavonoid content and 2,2-diphenyl-1-picrylhydrazyl (DPPH)-scavenging capacity are time-consuming and la...

This study was performed to increase the availability of Sedum sarmentosum (Dolnamul) and to improve the nutraceutical value of rice cakes (sulgitteok). The contents of crude protein, mineral, dietary fiber, water holding capacity, and hardness significantly and directly increased with lyophilized sedum powder (SP). Pore ratio and expansion rate decreased in samples containing more than 10% SP ...

The synthesis of gentiooligosaccharides of genistein and glycitein using cultured cells of Eucalyptus perriniana as biocatalysts was investigated. The cells of E. perriniana glycosylated genistein and glycitein to give the corresponding 4'-O-β-glucosides, 7-O-β-glucosides, and 7-O-β-gentiobiosides, which were two new compounds. The β-glucosides of genistein and glycitein showed 2,2-diphenyl-1-p...

The title compound, [Fe(C(5)H(5))(C(19)H(16)O(2)P)], obtained serendipitously during recrystallization of 1-hydroxy-benzotriazolyl (S(p))-2-(diphenyl-phosphino)ferrocene-1-carboxyl-ate from meth-anol, crystallizes in the chiral space group P2(1)2(1)2(1). Its crystal structure not only confirms the anti-cipated absolute configuration but also establishes a rather regular geometry for the ferroce...

Four new flavonoids, 3'-formyl-4',6',4-trihydroxy-2'-methoxy-5'-methylchalcone (1), 3'-formyl-6',4-dihydroxy-2'-methoxy-5'-methylchalcone 4'-O-beta-D-glucopyranoside (2), (2S)-8-formyl-6-methylnaringenin (3), and (2S)-8-formyl-6-methylnaringenin 7-O-beta-D-glucopyranoside (4) were isolated from the buds of Cleistocalyx operculatus (Myrtaceae). The structures of the new metabolites (1-4) were de...