A new procedure to determine copper has been proposed using an irreversible and disposable multilayer optical test strip. Two layers form the sensing zone: a copper sensitive and a dialysis layer. The test strip is characterised to be a disposable polyester sheet contained in a circular film 6mm in diameter and 25 mm in thickness, with all reagents necessary to produce a selective response. The...

The oxidative stability of margarine supplemented with different concentrations of fennel (Foeniculum vulgare) seed extract (FSE) was compared to the synthetic antioxidants; butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) at legal concentrations. The experiment was carried out under accelerated storage conditions for 4 weeks employing peroxide value (PV), p-anisidine value (AV...

(OMe (1a), Me (1b), Cl (1c)) has attracted chemists’ attention because it has easily produced benzenesulfenanilidyl radicals (49-OMe (Aa), 49-Me (Ab), 49-Cl (Ac)) and yielded phenazines as one of final products. The coupling of benzenesulfenanilidyl radicals also seems interesting from a synthetic viewpoint for one-pot synthesis of 2,7-disubstituted phenazines (OMe (2a), Me (2b), Cl (2c)). Howe...

Laccase is one of the ligninolytic enzymes found in liquid cultures of the fungus Ceriporiopsis subvermispora in defined medium. As an approach to a clarification of the role of laccases during the attack on lignin by the fungus, the enzyme has been characterized further. The levels of this phenol oxidase increase 2-fold in the presence of p-anisidine and are severely affected when addition of ...