Fig. 2From: In vitro biosynthesis of Ag, Au and Te-containing nanostructures by Exiguobacterium cell-free extractsAssessing metal(loid)-reducing activity of crude extracts from E. acetylicum MF03, E. aurantiacum MF06 and E. profundum MF08. Reduction of Ag (a), Au (b) and Te (c) was carried out as described in Methods. Black and white bars represent no treatment or toxicant exposure, respectively. +, aerobic tests; −, anaerobic tests. Bars represent the average of 3 independent trials. **, p < 0.01; ns, not significantBack to article page