[The usefulness of ruthenium red in dye exclusion test on cultured cells (author's transl)].

The reliability of statements and the reproducibility of results derived from experiments on cell cultures are dependent on the use of practicable methods for most objective assay of the state of the cells. The experiments were to clarify the following questions: 1. Is it possible to assay vital and nonvital cells by use of the dye exclusion test (FET)? 2.

[Studies on the cytotoxicity of poly-L-arginine, poly-L-lysine and DEAE-dextran in L-cells and mouse embryonic fibroblasts].

Cellular insulin uptake is influenced by poly-L-arginine, poly-L-lysine and DEAE-dextran. In this study it is asked for the mechanisms of these influences as well as for the cytotoxicity of different concentrations of these substances. The experiments aim to contribute to the knowledge on toxic concentrations of polycations.