Figure 1

Concentration micrographs of MMC in gelatin and in dried state. a) Mitomycin C was dissolved in aqueous gelatin at concentrations of 0, 60, and 180 μ M to form thin hydrogel slices, that were imaged at the detection and reference wavelengths, respectively. The resulting images were used for computing the displayed concentration micrographs. b) Droplets of MMC were placed on a glass slide at the nominal concentrations and allowed to dry. Crystallite boundaries scatter light and appear as high MMC concentrations in the micrograph. The color scale shows the MMC concentrations at specific locations. The difference in units (μ M and mM) in the two color scales should be noted.