49I-17 |
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M. E. Arce Corrales1, T. R. Rentería Gutierrez2, M. G. GONZALEZ TOVAR3, and A. G. Corella M.2. (1) Ciencias Qumico Biologicas, universidad de sonora, retorno catalinas no. 26 pte. residencial catalinas, Hermosillo, Mexico, (2) ciencias quimico biológicas, universidad de sonora, retorno catalinas no.26 pte, residencial catalinas, hermosillo, Mexico, (3) ciencias químico biológicas, universidad de sonora, retorno catalinas no. 26, residencial catalinas, hermosillo, Mexico In Mexico, Sonora occupies the fourth place in corn production, counting as important productive regions Vicam and Etchojoa. In this cities, rural storages are used to store this product, in which no adequate temperature or relative humidity control of the environment and the product is found, causing storage fungus and its consequent production of metabolites. This work’s objective was to realize a detection and quantification of fungus and total of aflatoxines in white corn hybrids stored under rural conditions in this Sonoran regions. The samples used were Pantera’s (region of Vicam) and Venado’s (region of Etchojoa) white corn hybrids. For the determination of fungus percentages, Christensen Method (1976) was used; and for the detection of aflatoxines, Aflatest® Method. Besides this, relative humidity conditions (HR), and temperature (Tº) using a digital Fisher higrometer, were measured. The quantity of Precipitation (PR) data were obtained from SEMARNAT. A correlation (p<0.05) of this parameters (HR, Tº and PR) was made with the aflatoxine concentration using JMP 4.0 software. The obtained results were: Pantera’s hybrid presented an incidence of 25% Aspergillus, Penicillium, Rhizopus fungus, while Venado’s hybrid presented a 45%. As far as the concentrations of aflatoxines, for Pantera’s hybrid the result was 3.3 ppb, having no correlation with the measured parameters, and for Venado’s hybrid, 49 ppb, having correlation (p<0.05) with PR,T°and HR. The results suggest that Pantera’s hybrids present a higher resistance to fungus and its metabolites production caused by climate variations and rural storage.
Session 49I, Toxicology & Safety Evaluation: General
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