Fig. 8From: Copper biosorption by Bacillus pumilus OQ931870 and Bacillus subtilis OQ931871 isolated from Wadi Nakheil, Red Sea, EgyptEffect of copper concentrations on CFU of Bacillus pumilus (a) and Bacillus subtilis (b). The ANOVA test was carried out by using SPSS 21 comparisons among means (n = 3), different letters show significance among the different treatments at p = 0.05 level based on Duncan's multiple range testBack to article page