those values were calculated in the example above a very high similarity value 0 89 was obtained when compared to acryl amide this could indicate that the unknown compound has biological effects similar to those of acryl amide fig7 shows an example on how the generation of toxic fingerprints with the indicator device and subsequent cluster analysis of data can give more information on the chemical compounds assayed than just an indication on level of toxicity would do the figure illustrated is a dendrogram derived from clustering of the similarity coefficients obtained from comparisons of the toxic fingerprints of different standard chemicals the discrimination power and the reproducibility comparisons between different assays of the toxic fingerprints is also visualized in the dendrogram the figure shows that the similarities between the toxic fingerprints of the same chemical compounds even when assayed at different occasions are higher than between different chemical compounds thus indicating a high reproducibility of the toxic fingerprints although in some cases the reproducibility is below 0 8 the similarities between the toxic fingerprints of the same chemical compounds even when assayed at different occasions are higher than between different chemical compounds the dendrogram in fig7 also indicate the approach for building up a database of toxic fingerprints for different compounds of known toxicity compounds with different toxicity levels will of course cluster differently with the database however compounds with similar toxic levels but different biological effects should preferably also cluster different according to their toxic fingerprints an example of this in the.