Fig. 8

Surface of brass alloy coupon at magnification 3.2 micron: (a) polished coupon, (b) coupon exposed to (SRB) cultural medium for two weeks (containing only cephradine).

Surface of brass alloy coupon at magnification 3.2 micron: (a) polished coupon, (b) coupon exposed to (SRB) cultural medium for two weeks (containing only cephradine).