Abstract
Fulmer and Huesselmann 1 showed the production of yeast growth stimulant by sterilizing sucrose in the presence of ammonium chloride, dipotassium phosphate and a mixture of the 2 salts. Similar results here are recorded for the following bacteria: Aerobacter faeni, Escherichia freundii, Actinomyces Sp?, A. aerogenes, Serratia Marcescens, Esch. coli, and Bacillus subtilis. The first 4 named were considerably more stimulated than the last 3. Treatment of the caramalized media with Norite A removed the coloring matter but not the stimulant. The stimulation took place at any pH value through the viable range. The results are especially interesting in view of the recent report by Lewis 2 that the growth of several bacteria studied by him was inhibited by caramalization of the medium in the presence of nitrogenous compounds.
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