The influence of ozone gaseous on fungal spoilage and aflatoxin degradation in peanuts
2011
Abdel-Alim, H.A. | Hassanien, F.R. | El-Nemr, S.E. | Abdel-Wahhab, M.A.
The aims of the current study were to identify the toxigenic fungi associated with peanut and to study the effect of ozone gaseous (03) on fungal spoilage and aflatoxin concentration in peanuts. Peanut samples were collected from three Egyptian Sharkia, Cairo and Ismailia during the season of 2007 Peanut samples were exposed to 03 at doses of 20 , , 10 min and 50 ppm for 5min.totalfungal counts were estimated in ozonated and non-ozonated peanut shells and seeds using tow ppm for 5 min, 40 ppm for in different media and amflatoxin concentration was determined in the ozone treated and non-treated peanuts. The results indicated that all the shell and seed samples were infected with fungi and the samples from Sharkia were the most infected recording the highest total fungal counts followed by the samples collected from Cairo governorate. Aspergillus flavus was isolated from all seed samples but did not isolated from peanut shells. Exposure to 03 gaseous was effective to reduce total fungal counts in a dose dependent manner and succeeded to eliminate A. flavus in seed samples. All seed samples were contaminated with aflatoxin. Exposure to 03 at 40 ppm for 10 min succeeded to degrade aflatoxin in peanut seeds.
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