Figure 2

Measuring curves of the kinetic course of the oxygen-signals [measured Δ fluorescence in normalized relative fluorescence units (nrfu)] from L-929-cells incubated with media, (top) which had been treated with different cytotoxic glutaraldehyde concentrations (0.1%,1%,10%) and (bottom) modified media by PMMA and by collagen matrix for 20 h, respectively.