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  • Title: Aflatoxin in detannin coffee and tea and its destruction.
    Author: Hasan HA.
    Journal: J Nat Toxins; 2002 May; 11(2):133-8. PubMed ID: 12009113.
    Abstract:
    The aflatoxins produced byAspergillus parasiticus var. globosus IMI 12090 in detannin-caffeinated coffee and black tea were five times more concentrated than in regular coffee and tea. The activity of caffeine and tannin on the fungus growth and aflatoxin production in liquid broth was tested at three levels: viz. 0.1, 0.3, and 0.6%. Tannin and caffeine induced 95% inhibition in aflatoxins at 0.3% and 0.6%, respectively. The antiaflatoxigenic properties of regular coffee and tea appear to be due to tannin, followed by caffeine. The roasting of contaminated coffee beans at 200 degrees C for 20 min is effective in the destruction of aflatoxins.
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