title: [On the contamination of the citric acid fermentation. II. Sodium 5-nitrofurylacrylate as an antiseptic against representatives of the Enterobacteriaceae (author's transl)].
abstract: In context with the first communication which deals with the characterization of the so-called brown contamination called forth by Enterobacteriaceae in the citric acid fermentation of molasses, the present paper describes the screening of antiseptic substances able to suppress the contamination mentioned without damaging the normal growth of the producing mould Aspergillus niger and its ability of producing citric acid. Among the substances tested the sodium salt of 5-nitrofurylacrylic acid (5-NFA) excelled partly because of its antiseptic effect in relatively small concentrations and partly because the mould tolerates appreciable amounts of this antiseptic. Therefore there may be applied, in the presence of a heavy contamination, relatively high concentrations of the antiseptic without fear of damaging the producing mould. Usually a dose of 10 to 15 mg 5-NFA in 11 of medium was sufficient to suppress the brown contamination.
mesh_terms: D000179:Acrylates / Q000494:pharmacology*; D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000494:pharmacology*; D001234:Aspergillus niger / Q000187:drug effects* / Q000378:metabolism; D002951:Citrates / Q000096:biosynthesis*; D004353:Drug Evaluation, Preclinical; D004754:Enterobacter / Q000187:drug effects; D004755:Enterobacteriaceae / Q000187:drug effects*; D004926:Escherichia coli / Q000187:drug effects; D005285:Fermentation / Q000187:drug effects; D008965:Molasses; D009581:Nitrofurans / Q000494:pharmacology*; D011514:Proteus vulgaris / Q000187:drug effects
chemical_list: D000179:Acrylates; D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D002951:Citrates; D009581:Nitrofurans; C222012:nitrofurylacrylic acid
vernacular_title: Uber Kontaminationen der Zitronensäuregärung. 2. Mitteilung: natrium-5-nitrofurylacrylat als Antiseptikum gegen Vertreter der Enterobacteriaceae.