Adsorption of hydrogen ions and dye cations by washed bacterial cells shows a reciprocal relationship. Apparently, H-ions and crystal violet ions are held by the cell at the same adsorption centers, and the influence of H+ on basic dye adsorption is one of direct competition or replacement The adsorption of H+ and acid fuchsin is similar in that an increase is noted as the pH of the suspension is lowered.
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McCalla et al. (1941) studied this question.
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