Fig. 4From: Isolation, characterization and application of theophylline-degrading Aspergillus fungiEffects of potential theophylline-degrading fungi on 3-methylxanthine and xanthine, respectively. Biocidal treatment was defined as the control. All data were present by mean value ± SD of three replications. The lowercase letters indicated a significant difference at p < 0.05 levels and the uppercase letters indicated a highly significant difference at p < 0.01 levels using one-way ANOVA of SPSS 20.0. The different letters show significant differencesBack to article page