Abstract
Crude rapeseed oil and post-refining fatty acids were used as substrates for oxalic acid production by a mutant of Aspergillus niger. Both the final concentration and the yield of the product were highest at pH 4 to 5. With a medium containing 50 g lipids l(-1), production reached a maximum of 68 g oxalic acid l(-1) after 7 d. A high yield of the product (up to 1.4 g oxalic acid g(-1) lipids consumed) was achieved with oil and fatty acids combined.
MeSH terms
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Aspergillus niger / chemistry
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Aspergillus niger / genetics*
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Aspergillus niger / growth & development
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Aspergillus niger / metabolism*
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Fatty Acids / metabolism*
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Fatty Acids, Monounsaturated
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Genetic Engineering / methods
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Hydrogen-Ion Concentration
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Lipid Metabolism
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Mutation
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Mycelium / growth & development
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Oxalic Acid / metabolism*
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Plant Oils / metabolism*
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Rapeseed Oil
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Species Specificity
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Substrate Specificity
Substances
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Fatty Acids
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Fatty Acids, Monounsaturated
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Plant Oils
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Rapeseed Oil
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Oxalic Acid