Effect of different glucose concentration on melanoidin decolorization. Decolorization yield (), Biomass production (). The control flask does not contain glucose. Test flasks contained different concentration of glucose in the medium at a level of 0.6% (w/v). Inoculated flasks were incubated at 45°C for 24 h. Error bars presented are mean values of ± standard deviation of triplicates of three independent experiments.