Emulsifying and surface active agents fromCorynebacterium hydrocarboclastus

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Abstract
A Corynebacterium hydrocarboclastus culture isolated in our laboratory (see, Zajic and Knettig, Developments in Industrial Microbiology, 1971, p. 87) has been shown to produce an extracellular biopolymer with emulsifying properties when grown on a mixture of linear hydrocarbons. This microorganism was found to grow well on a variety of carbohydrates and hydrocarbons. However, the best substrates were pure linear hydrocarbons and particularly, n‐C12, n‐C13, and n‐C14. The substrates supporting good growth gave good polymer production. Maximum cell mass of 10–11 g/liter and a maximum amount of polymer of 5–6 g/liter were recorded. The polymers recovered from the different substrates were found to be complex molecules or mixtures with a protein, a lipid, and a carbohydrate moiety. All the polymers are surface active and have two critical micelle concentrations.

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