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Search for "SEICHERT L.": 2 articles found.
MUSÍLKOVÁ M., UJCOVÁ E., SEICHERT L., SIKYTA B., KRUMPHANZL V. (1982): A comparison of the effect of mutagens on a high citric acid producing strain of Aspergillus niger. Česká Mykologie 36(1): 47-51 (published: 1982)
abstract
Effects of three mutagens on spores of Aspergillus niger NG 233 were compared. After treatment with UV light and N-Methyl-N’-nitro-N-nitrosoguanidine, significant differences of citric acid production amongst isolates were detected; N-Ethyl-N-nitrosourea was the least effective mutagen. A maximum increase of 13% over the high productivity of the original strain was recorded for UV light as mutagen. In general, storage of spores decreased the activity of a series of strains with the exception of the isolate UV 6, which retained its activity of citric acid production.
MUSÍLKOVÁ M., FENCL Z., UJCOVÁ E., SEICHERT L. (1979): The viability and physiological activity of spores of Aspergillus niger under different methods of preservation. Česká Mykologie 33(3): 181-184 (published: 1979)
abstract
Spores of the Aspergillus niger mutant MBU 90, producing high quantities of citric acid under submerged conditions, will keep their viability during a period of 4 years when stored in talc or in lyophilized form (using inactive horse serum or dried milk). When spores are stored in active coal a decrease in spore viability was noted after 3–4 years of storage. Moreover, an increase in the frequency of different morphological modifications was observed.
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