Fig. 4From: Factors affecting use of ballistics gelatin in laboratory studies of bacterial contamination in projectile woundsBacterial recovery from the filtration of 300 ml of M9 buffer and 25 ml E. coli culture. Half of the filter was immediately processed and the other half was dried for one hour at 37 °C prior to processing. No significant difference was found between the two (P = 0.49). Error bars represent the standard deviationBack to article page