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  • 1980-1984  (4)
  • 1975-1979  (2)
  • 1965-1969  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Peanut Flour Constituents, Cyclic Imino Acid Derivative from Peanut Flour (1965)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 13 (1965), S. 309-311 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf60140a006
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    EFFECT OF AMMONIATION ON THE PHYSICOCHEMICAL PROPERTIES OF PEANUT AND COTTONSEED MEALS (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 45 (1980), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Peanut and cottonseed meals prepared from seed inoculated with A. parasiticus were treated in a laboratory ammoniator under three sets of heat and pressure. Detoxification of the meal was similar for all treatments. Nitrogen solubility, methionine, lysine, available lysine, sugars, immunochemical and gel-electrophoretic protein patterns were measured on all samples. Differences between the unammoniated meals and those treated under the mildest conditions of heat and pressure were negligible. Meals ammoniated under the harsher conditions showed reductions in methionine, lysine, and available lysine contents and in free sugars as well as changes in nitrogen solubility and gel-electrophoretic patterns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1980.tb04101.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Role of lactone ring of aflatoxin B1 in toxicity and mutagenicity (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 16-17 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cleavage of the lactone ring of aflatoxin B1 results in a nonfluorescent compound that has greatly reduced biological activity. Mutagenicity, as measured by the Ames test, is reduced 450-fold compared to that of B1, and toxicity, as measured by the chick embryo test, is reduced 18-fold.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01965543
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of trace elements and nitrogen sources on versicolorin production by a mutant strain of Aspergillus parasiticus (1979)
    Springer
    Mycopathologia 69 (1979), S. 161-166 
    Details
    ISSN: 1573-0832
    Keywords: Aspergillus parasiticus ; Furobenzofuran ; Versicolorin A ; Versicolorin C
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A mutant strain of Aspergillus parasiticus blocked in aflatoxin biosynthesis accumulates versicolorin A and versicolorin C. The effect of trace elements on the growth and versicolorin production by this strain was studied in a defined medium. The omission of manganese was slightly stimulatory to versicolorin production; when zinc was omitted from the medium, no detectable versicolorins were produced. Experiments on nitrogen sources in a highsucrose medium indicated that fourfold to fivefold increases in versicolorin yields could be obtained by substituting 3 ml/l corn steep liquor or 0.1 M NH4NO3 for the 0.023 M (NH4)2SO3 used previously as the nitrogen source in studies on versicolorin production by this strain. These improved yields will facilitate attempts to accumulate enough versicolorin A and versicolorin C for toxicity and carcinogenicity testing. Chromatographic profiles of mycelial extracts of cultures grown in a defined medium with 0.1 M NH4NO3 as the nitrogen source revealed 2 previously unrecognized compounds. The accumulation of these new metabolites in a mutant blocked in aflatoxin production may indicate that they are biosynthetically related to aflatoxin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00452829
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of acetone on production of aflatoxins and versicolorin pigments by resting cell cultures of aspergillus parasiticus (1976)
    Springer
    Mycopathologia 58 (1976), S. 9-12 
    Details
    ISSN: 1573-0832
    Keywords: Aflatoxins ; Versicolorins ; Aspergillus parasiticus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Resting cell cultures of Aspergillus parasiticus were grown in medium containing four different concentrations of glucose, with and without acetone. In addition, the effect of different equimolar concentrations of acetone, acetic acid, ethanol, and sodium acetate was compared at two glucose levels. Aflatoxin and versicolorin pigment production increased in resting cell medium containing increasing concentrations of glucose. In the presence of glucose high concentrations of acetone (1.0 and 0.25 M) inhibited secondary biosynthesis and low concentrations of acetone (0.1, 0.025 and 0.01 M) stimulated secondary biosynthesis of aflatoxins and versicolorin pigments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00493586
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Production of aflatoxins on soybean and cottonseed meals (1983)
    Springer
    Mycopathologia 83 (1983), S. 125-127 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The production of aflatoxins by Aspergillus flavus SRRC-1000 growing on soybean (Forrest) and glandless cottonseed (Deltapine 16) meals was examined with respect to effects of zinc and phytate. Aflatoxins were not produced on unautoclaved soybean meal. Addition of zinc (as zinc sulfate) to autoclaved meal inhibited aflatoxin production and supplementation with sodium phytate relieved this inhibition. Addition of sodium phytate alone promoted production. When cottonseed meal was treated to release native phytate into the meal from phytate-sequestering globoids, aflatoxin production increased. However, the largest production on cottonseed meal occurred upon dialysis of the meal without releasing phytate, implying removal of a small molecular weight inhibitor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00436896
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Dry-column chromatographic purification of aflatoxin precursors (1980)
    Springer
    Biotechnology letters 2 (1980), S. 17-22 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The toxic and carcinogenic properties of aflatoxins are well understood, but little is known about the biological activity of the anthraquinone precursors of aflatoxin. This paper describes a dry column chromatographic method for preparing averantin, averufin, norsolorinic acid and versicolorin A from mycelial extracts of blocked mutants of Aspergillus parasiticus in quantities suitable for toxicological testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00136878
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    Paper (German National Licenses)
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