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  • 1975-1979  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    METHYLXANTHINE INHIBITION OF AFLATOXIN PRODUCTION (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 43 (1978), 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: The effects of caffeine and theophylline on growth and aflatoxin B1 production by Aspergillus parasiticus NRRL 2999 were studied in AMY medium at pH 4.5. Caffeine levels of 0.5, 1.0 and 2.0 mg/ml decreased aflatoxin production by 86, 96 and 100%, respectively. Theophylline levels of 2.0, 4.0 and 8.0 mg/ml were tested, but only the highest concentration was inhibitory, decreasing aflatoxin production by 54%. Inhibition of growth was noted, but did not completely account for the reduction in aflatoxin production. The data help explain why aflatoxins are not usually isolated from caffeine-containing commodities, and indicate that aflatoxin synthesis may be regulated by cyclic AMP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1978.tb02383.x
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  • 2
    Electronic Resource
    Electronic Resource
    Promotion of Flowering on Mature Picea sitchensis by Gibberellin and Environmental Treatments. The Influence of Timing and Hormonal Concentration (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 45 (1979), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Male and female flowering were significantly promoted by gibberellin A4/7+ A3 mixtures applied beneath bark flaps on branches of 11-year-grafted mature scions of Picea sitchensis (Bong.) Carr. growing in the open in Scotland; 4 mg/ml gave more flowering than higher or lower concentrations of gibberellins and application in June was more effective than in July.Gibberellins also increased male flowering on mature scions when applied directly to the buds in a polythene house. A gibberellin A4/7+ A3 mixture produced greater numbers of strobili when applied to 2-year-grafted plants in May and June than when applied in July and August. Flowering of 5-year-grafted plants increased with increasing concentrations of a gibberellin A4/7+ A9 mixture up to 19.7 mg/ml above which flowering decreased.Modifying the environment by keeping in a polythene house enhanced the combined male and female flowering of 5-year-grafted mature scions above the amount on control plants outside, the effect being more marked in June and July than in August and September. Larger numbers of gibberellin applications or longer total lengths of time in the polythene house gave significantly greater amounts of combined male and female strobili.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1979.tb01673.x
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