as h 2 o 2 as organic peroxide compounds as peroxide adducts e g urea or enzymatically generated the preferred enzymes for the generation of peroxide are oxidases with o 2 as acceptor of the class 1 group 1 1 3 according to the international enzyme nomenclature committee of the international union of biochemistry and molecular biology enzyme nomenclature academic press inc 1992 pp 55 60 such as e g malate oxidase 1 1 3 3 glucose oxidase god 1 1 3 4 hexose oxidase 1 1 3 5 cholesterol oxidase 1 1 3 6 aryl alcohol oxidase 1 1 3 7 l gluconolacton oxidase 1 1 3 8 galactose oxidase 1 1 3 9 pyranose oxidase 1 1 4 10 l sorbose oxidase 1 1 3 11 alcohol oxidase 1 1 3 12 choline oxidase 1 1 3 17 secundary alcohol oxidase 1 1 3 18 glycerol 3 phosphate oxidase 1 1 3 21 xanthin oxidase 1 1 3 22 thiamin oxidase 1 1 3 23 l galactonolacton oxidase 1 1 3 24 cellobiose oxidase 1 1 3 25 hydroxyphytanate oxidase 1 1 3 27 n acetylhexosamine oxidase 1 1 3 29 polyvinyl alcohol oxidase 1 1 3 30 and methanol oxidase 1 1 3 31 particularly preferred among these enzymes are as special redox enhancer compounds according to the invention the following compounds are preferably used like e g thiocyanates isothiocyanates such as aryl monoisothiocyanates alkyl monoisothiocyanates and the respective bis compounds such as aryl diisothiocyanates and alkyl diisothiocyanates and isocyanates like alkyl.