natural occurrence of aflatoxins and zearalenone in maize in brazil. part ii.the levels of aflatoxins and zearalenone were determined in 328 samples of corn from the states of santa catarina, minas gerais, são paulo, paraná, rio grande do sul and espírito santo by thin-layer chromatography; the samples were obtained from april 1985 through to march 1986. in 12.3% of these samples aflatoxin b1 was detected in concentrations that varied from 10 to 900 micrograms/kg (ppb); 18 samples showed levels above those tolerated by brazilian legislation. zearalenone was found in 4.5% ...19892524411
fumonisins in corn (zea mays l.) from southern brazil.a total of 232 samples of corn commercialised in santa catarina state, southern brazil (temperate zone climate), were evaluated from 2007 to 2012 for fumonisins (fbs: fb1 and fb2). before performing this study, a fbs method with liquid chromatography and fluorescence detection (ex. 335; em. 440 nm) was validated first. fbs were detected in 46.6% (108 samples), with values ranging from 66 to 7832 µg kg(-1) for fb1 and 110 to 1201 µg kg(-1) for fb2. the number of contaminated corn samples for fb1 ...201424914602
potential of carbon accumulation in no-till soils with intensive use and cover crops in southern brazil.the area under no-till (nt) in brazil reached 22 million ha in 2004-2005, of which approximately 45% was located in the southern states. from the 1970s to the mid-1980s, this region was a source of carbon dioxide to the atmosphere due to decrease of soil carbon (c) stocks and high consumption of fuel by intensive tillage. since then, nt has partially restored the soil c lost and reduced the consumption of fossil fuels. to assess the potential of c accumulation in nt soils, four long-term experim ...200616825480
fumonisin contamination and fusarium incidence in corn from santa catarina, brazil, the southern region has the highest incidence of esophageal cancer and also the highest production and consumption of corn (zea mays) products. corn samples intended for human consumption from the western, northern, and southern regions of the state of santa catarina, southern brazil, had mean total fumonisin b (b(1), b(2), and b(3)) levels of 3.2, 3.4, and 1.7 mg/kg, respectively. fusarium verticillioides, the predominant fungus in the corn samples, had mean incidences (percent of ke ...200312926917
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