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| Scaff,Rejane Maria Cirra; Scussel,Vildes Maria. |
| Corn flour, "canjica" (corn grits), corn flakes and popcorn for human consumption, commercialized in Santa Catarina (n=82), were analyzed in order to detect the presence of fumonisins B1 (FB1) and B2 (FB2). From the samples, 92.68% showed detectable levels of Fumonisins (FBs). Corn flour showed the highest level of contamination (91.5%) with average levels of 3.811 and 5.737 mg/g for the home-processed and industrialized products, respectively. The next most contaminated product was popcorn with a average of 2.872 mg/g and an occurrence in 91.6% of the samples. All samples of corn flakes were contaminated with an average of 1.307 mg/g. The product with the lowest levels of FBs was "canjica" with a average contamination of 0.732 mg/g. These results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corn; Fumonisins; Brazilian corn products. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600011 |
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| Ono,Elisabete Yurie Sataque; Biazon,Luciana; Silva,Marcelo da; Vizoni,Édio; Sugiura,Yoshitsugu; Ueno,Yoshio; Hirooka,Elisa Yoko. |
| Natural fungal and fumonisin contamination were evaluated in 109 freshly harvested corn samples from Paraná State and correlated to damaged kernels (%). In addition, healthy and damaged kernels of 24 corn samples were selected in order to compare the mycoflora profile and fumonisin levels. The correlation among protein/lipid content and fumonisin levels was also analyzed in the 15 most frequently cultivated corn hybrids. Total fungal colony count in 109 freshly harvested corn samples ranged from 1.9x10(4) to 3.5x10(6) CFU/g, Fusarium sp. count from 1.0x10³ to 2.2x10(6) CFU/g, and fumonisin levels from 0.13 to 20.38 µg/g. Total fungal colony/Fusarium sp. count and fumonisin levels showed positive correlation (p < 0.05). In addition, there was a positive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycoflora; Toxigenic fungi; Mycotoxins; Fumonisins; Corn quality. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100008 |
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| Stumpf,R.; Santos,J. dos; Gomes,L.B.; Silva,C.N.; Tessmann,D.J.; Ferreira,F.D.; Machinski Junior,M.; Del Ponte,E.M.. |
| Ear rots caused by Fusarium spp. are among the main fungal diseases that contribute to poor quality and the contamination of maize grains with mycotoxins. This study aimed to determine the visual incidence of fungal-damaged kernels (FDKs), the incidence of two main Gibberella (a teleomorph of Fusarium) complexes (G. fujikuroi and G. zeae) associated with maize using a seed health blotter test, and the fumonisin levels, using high performance liquid chromatography, in samples of maize grains grown across 23 municipalities during the 2008/09 and 2009/10 growing seasons. Additionally, 104 strains that were representative of all of the analysed samples were identified to species using PCR assays. The mean FDK was seven per cent, and only six of the samples had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fusarium graminearum; Fusarium verticillioides; Fumonisins; Zea mays L. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100012 |
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| Camargos,Simone M.; Soares,Lucia M. Valente; Sawazaki,Eduardo; Bolonhezi,Denizart; Castro,Jairo L.; Bortolleto,Nelson. |
| Twenty three samples, belonging to 19 corn cultivars with distinct types of germoplasms, endosperm and length of vegetative cycle, were analyzed for fumonisins B1 and B2. The cultivars were grown in experimental fields in three locations (Votuporanga, Ribeirão Preto and Capão Bonito) within the State of São Paulo, Brazil, during the 97/98 crop. All samples were contaminated with fumonisins with concentrations ranging from 1.63 µg/g to 25.69 µg/g with an average of 5.61 µg/g for FB1 and from 0.38 µg/g to 8.60 µg/g with an average of 1.86 µg/g for FB2. In terms of fumonisins, these high levels put the corn cultivated in São Paulo among the most contaminated in the world reported to date. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycotoxins; Fumonisins; Fusarium; Corn. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000300015 |
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| Almeida,Adriana P.; Corrêa,Benedito; Mallozzi,Marisa A. B.; Sawazaki,Eduardo; Soares,Lúcia M. Valente. |
| The mycoflora of 3 hybrids of freshly harvested corn grains collected from three regions of the state of São Paulo, Brazil (Assis, Capão Bonito and Ribeirão Preto) was investigated. A total of 66 samples were analyzed focusing on the influence of abiotic factors (moisture content, water activity, temperature and rainfall) on both the prevalence of Aspergillus flavus and Fusarium moniliforme, and the ability of these genera isolates to produce aflatoxins and fumonisins, respectively. In the three surveyed regions, the fungal population comprised mainly Fusarium spp., Penicillium spp., Aspergillus spp. and 2 others filamentous fungal genera, which were isolated from corn kernels showing water activity of 0.30 to 0.99 and moisture content of 5.0% to 20.2%.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aflatoxins; Aspergillus flavus; Fumonisins; Fusarium moniliforme; Corn. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000400016 |
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| Dilkin,Paulo; Mallmann,Carlos A.; Almeida,Carlos A.A. de; Stefanon,Eliza B.; Fontana,Fernanda Z.; Milbradt,Elisane L.. |
| Production of fumonisins B1 (FB1) and B2 (FB2) by two Brasilian strains (LAMIC 2999/96 and 113F) and one American strain (NRRL 13616) of Fusarium moniliforme were evaluated in laboratory cultures subjected to different temperatures (20, 25, and 30ºC), and moisture contents (25, 34, and 42%) on corn substrate. The cultures were grown during 10, 20, 30, 45, and 60 days, totalizing 135 treatments with two repetitions for each one. The fumonisins were extracted with acetonitrile/water. The clean-up with end-capped C18 silica (C18ec) cartridges and fumonisin derivatization with o-phtaldialdeyde were carried out through an automated sample processor system (ASPEC), followed by quantification of the toxins through HPLC. Fumonisin production varied widely,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fungi; Fusarium moniliforme; Mycotoxins; Fumonisins; Abiotic factors. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200003 |
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| Mazzani,Claudio; Borges,Orángel; Luzón,Odalís; Barrientos,Venancio; Quijada,Pablo. |
| Fusarium moniliforme (FM) incidence and fumonisins (FUM) content were determined in white kernel samples of maize hybrids, harvested in farms of Guárico and Portuguesa states, Venezuela. FM incidence was estimated in subsamples placed on a malt-salt-agar medium. Values in the range of 0-15 % were considered low, from 15-30% intermediate, and more than 30% high. FUM content was quantified through specific immunoassay (Fumonitest, VICAM Sci. Tech., USA) and values above 1 ppm were considered high. The hybrids were compared using a completely randomized design and results were subjected to analysis of variance and mean comparisons. The correlation between FUM content and FM incidence was also estimated. FM and FUM were detected in all of the 89 samples. Mean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fusarium moniliforme; Fumonisins; Venezuelan maize; Hybrids. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000400018 |
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