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| Geraldo,Márcia Regina Ferreira; Tessmann,Dauri José; Kemmelmeier,Carlos. |
| Fusarium fungi are known to be pathogenic for plants and mycotoxin producers. The in vitro production of deoxynivalenol and zearalenone was qualitatively evaluated in 24 different isolates of Fusarium graminearum collected from small cereals associated with the scab disease, in southern Brazil. Isolates were cultivated in rice during 14 days at 28ºC. Cultivates were extracted with methanol:water (40:60 v/v) and analyzed by thin layer chromatography. Other trichothecenes (diacetoxyscirpenol, fusarenon-X, neosolaniol and nivalenol) and zearalenol, often produced by Fusarium, were also analyzed. In the conditions used, it was possible to detect zearalenone and deoxynivalenol in 67% and 33% of the isolates, respectively. The presence of zearalenol,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fusarium graminearum; Mycotoxins; Scab; Small cereals; Southern Brazil. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000100011 |
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| Pereira,Angela Maria; Kemmelmeier,Carlos. |
| The original isolate of the galactose oxidase producing fungus Dactylium dendroides, and other five galactose oxidase producing Fusarium isolates were cultivated in different media and conditions, in order to evaluate the production of 11 mycotoxins, which are characteristic of the genus Fusarium: moniliformin, fusaric acid, deoxynivalenol, fusarenone-X, nivalenol, 3-acetyldeoxynivalenol, neosolaniol, zearalenol, zearalenone, acetyl T-2, and iso T-2. The toxicity of the culture extracts to Artemia salina larvae was tested. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Galactose oxidase; Fusarium; Dactylium dendroides; Mycotoxins. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000200013 |
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| Arroteia,Carla Cristina; Kemmelmeier,Carlos; Machinski Junior,Miguel. |
| A Região Sul do Brasil é grande produtora de maçã, sendo 80% destinada ao consumo in natura. As micotoxinas são metabólitos secundários de fungos presentes na cadeia alimentar como contaminantes, causando diversos efeitos toxicológicos e imunológicos. Considerando que a patulina seja uma micotoxina produzida por Penicillium expansum, principal contaminante da maçã propôs-se investigar a ação de extratos aquoso e oleoso de Nim (Azadirachta indica) em maçã artificialmente contaminada. Foram testados dois tipos de extratos: o extrato aquoso obtido de maceração de folhas de Nim nas concentrações de 5, 10, 20 e 30%, e o extrato oleoso comercial (DalNeem®), obtido de sementes de Nim, nas concentrações de 0,125, 0,25, 0,5, 1, 2 e 5%. Os extratos aquosos não... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Azadirachta indica; Maçã; Nim; Patulina; Penicillium expansum. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000600002 |
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