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Microscopic image of HT-29 human colorectal carcinoma cells in culture: Control cells (non-stimulated) and cells stimulated with different concentrations (0.05; 0.2; 1; 10 and 100 µg/ml) of sterile H2O for 24 h. H2O is the solvent used for the CdCl2 and CuSO4 solutions. The pictures were taken following 24 h of stimulation and the scale bars represent 50 µm.
