The Adsorption by Aerobacter Aerogenes of P-Hydroxybenzoic Acid and Its Esters and of Sodium Benzoate at Different Ph Levels

Abstract

Heavy suspensions of Aerobacter aeroqenes were used to measure the adsorption of sodium benzoate and of p-hydroxybenzoic acid and its methyl, ethyl, propyl, and butyl esters. It was found that the adsorbability of the esters increased logarithmically with increasing chain length of the ester group. Surface activity also increased logarithmically with chain length. A close parallel was observed between the adsorption of the compounds and their antimicrobial effectiveness found by earlier workers.