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Distribution of aflatoxins in corn fractions visually segregated for defects
Piedade, Fabiana Segatti; Fonseca, Homero; Gloria, Eduardo Micotti da; Calori-Domingues, Maria Antonia; Piedade, Sônia Maria Stefano; Barbin, Décio.
  • Piedade, Fabiana Segatti; Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Ciência e Tecnologia de Alimentos. Piracicaba. BR
  • Fonseca, Homero; Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Departamento da Produção Vegetal. Piracicaba. BR
  • Gloria, Eduardo Micotti da; Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Departamento de Agroindústria, Alimentos e Nutrição. Piracicaba. BR
  • Calori-Domingues, Maria Antonia; Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Departamento de Agroindústria, Alimentos e Nutrição. Piracicaba. BR
  • Piedade, Sônia Maria Stefano; Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Departamento de Ciências Exatas. Piracicaba. BR
  • Barbin, Décio; Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Departamento de Ciências Exatas. Piracicaba. BR
Braz. j. microbiol ; 33(3): 250-254, July-Sept. 2002. tab
Article in English | LILACS | ID: lil-349778
RESUMO
The aflatoxin distribution in corn fractions obtained after visual segregation for defects in 30 samples, known to be contaminated, was studied. Each sample was passed through a 5.0 mm round holes sieve, graded for defects and then segregated in sound kernels (regular kernels) and non-sound kernels (injured, germinated, fermented, moldy, heated, insect damaged, immature, broken, hollow, fermented up to », discolored, extraneous materials, and injured by other causes), as defined by the Brazilian Official Grading rules for corn. The non-sound kernels showed the highest contamination levels in all samples. The contamination levels of non-sound kernels (20 percent of total weight) ranged from 23 to 1,365 æg/kg of aflatoxins (B1, B2, G1 and G2) and were higher than sound kernels (p<1 percent) ranging from not detected (ND) to 126 æg/kg and in 87 percent of these the aflatoxin contents were lower than 20 æg/kg. Statistically significant correlation indexes were found among the percentage of defective groups like fermented, heated and sprouted kernels or the total injured kernels, and the estimated contamination levels for the sound and non sound fractions. It was concluded that the non-sound kernels fraction, even being small in weight, has contributed with 84 percent of the estimated contamination of the samples. The segregation of the non-sound kernels would favor a reduction in the contamination of corn lots. The poorer quality corn types (types 3 and Bellow Standart) have predominated among samples of the experiment
Subject(s)
Full text: Available Index: LILACS (Americas) Main subject: In Vitro Techniques / Zea mays / Aflatoxins Language: English Journal: Braz. j. microbiol Journal subject: Microbiology Year: 2002 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: Universidade de São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: In Vitro Techniques / Zea mays / Aflatoxins Language: English Journal: Braz. j. microbiol Journal subject: Microbiology Year: 2002 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: Universidade de São Paulo/BR