Jürgen Reiss

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The influence of various inhibitors of hyphal growth, sporulation and biosynthesis of aflatoxin B1 in Aspergillus parasiticus NRRL 2999 was studied. 6-Thioguanine, dl-ethionine, fluoroacetic acid and phenylboric acid, inhibitors of maturation of fungal conidiophores and of conidiogenesis, were added at various concentrations to malt extract agar. Lower(More)
the field applied (Fig. 2). The highest level of prostacyclin was provoked by the field of 0.15 T induction. The changes in prostacyclin content were reversible. It was back to normal after 3 weeks (Table 1). It is generally supposed that magnetic field exposure results in stress reactions in the organism [8, 9]. Magnetic field exposure produces a higher(More)
The fungi Penicillium expansum, Aspergillus niger, Cladosporium herbarum, Thamnidium elegans, Mucor hiemalis and Rhizopus nigricans were cultivated on filter disks containing various concentrations of crude aflatoxin or coumarin. After 3 days the rate of sporulation was noted. 100 μg/disk aflatoxin inhibits the sporulation of all fungi with the exception of(More)
The photodynamic effect of the arginine hematoporphyrin derivative (HpD-Arg(2)) on the growth of selected Pseudomonas aeruginosa clinical isolates is described as compared to the effect of hematoporphyrin derivative (HpD). Growth inhibition of HpD-Arg(2) of three Gram-positive strains (Staphylococcus aureus, Bacillus subtilis and Micrococcus luteus) and(More)
Addition of dimethylsulfoxide (DMSO) to the incubation medium of succinate dehydrogenase in a concentration of 10% enhances the staining reaction in the hyphae of the fungus Cercosporella herpotrichoides after an incubation period of 15 min. Controls without DMSO remain unstained. DMSO causes a rapid penetration of the components of the medium through the(More)
The fermentation activity of baker's yeast (measured by the amount of produced CO2) is inhibited by 100µg/ml and 10µg/ml aflatoxin B1, and by 100µg/ml and 10µg/ml diacetoxyscirpenol. Lower concentrations of these mycotoxins as well as of rubratoxin B enhance the fermentation. Only 0.001µg/ml aflatoxin B1, 0.00001µg/ml diacetoxyscirpenol and 0.01µg/ml(More)
  • J Reiss
  • Zeitschrift für Lebensmittel-Untersuchung und…
  • 1976
Sterigmatocystin was formed on different kinds of bread (whole wheat bread, whole rye bread, whole rye bread with shredded wheat, whole wheat bread with wheat germs and whole wheat bread with linseed) by two strains of Aspergillus versicolor. The highest yields were in the range of 0.1-0,4 mug/g. The growth of the moulds and the toxin production were(More)