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Registros recuperados: 5
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A method for the determination of two Alternaria toxins, alternariol and alternariol monomethyl ether, in tomato products BJM
Motta,Silvana da; Soares,Lucia M. Valente.
Tomatoes, as any soft skinned fruit, are easily susceptible to fungal rot. Alternaria is the genus most frequently encountered in tomatoes. A. alternata and other spp. have been shown to produce the toxins alternariol monomethyl ether (AME) and alternariol (AOH) in tomatoes. A method for determining AME and AOH in tomato products was developed and evaluated. The method involves extraction with methanol, clarification with ammonium sulfate, and partition to chloroform. Quantification was conducted by high performance liquid chromatography with diode array detector (DAD). Average recoveries were 98.7% and 84.1% for AME and AOH, respectively. The quantification limits of the method, defined as the minimum amount that allowed quantification and confirmation by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternaria; Mycotoxins; Alternariol monomethyl ether; Alternariol; Tomatoes.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000400015
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Composição mineral de sucos concentrados de frutas brasileiras Ciênc. Tecnol. Aliment.
Soares,Lucia M. Valente; Shishido,Katia; Moraes,Adriana M. Monteiro; Moreira,Valéria Avila.
Informações sobre a composição de alimentos nacionais são escassas. Sucos concentrados de frutas são amplamente utilizados por famílias brasileiras. No presente trabalho foram determinados oito elementos minerais (K, Na, Ca, Mg, Fe, Zn, Cu, Mn) com importância nutricional em sucos concentrados comerciais de frutas nacionais, abacaxi (3 marcas), acerola (2 marcas), caju (5 marcas), goiaba (3 marcas), manga (2 marcas), maracujá (5 marcas) e pitanga (1 marca) por espectrometria de absorção atômica com atomização em chama. A contribuição nutricional dos sucos para a dieta de crianças após a diluição recomendada pelo fabricante e considerando a ingestão diária de um copo de 300mL é elevada quanto a potássio para todos os sucos examinados (170 - 930% da ingestão...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Frutas nacionais; Sucos de fruta; Composição mineral; Minerais essenciais; Potássio; Ferro.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612004000200007
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Fumonisins in corn cultivars in the state of São Paulo BJM
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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Survey of moniliformin in corn cultivated in the state of São Paulo and in corn products commercialized in the city of Campinas, SP BJM
Leoni,Luís Antonio B.; Soares,Lucia M. Valente.
Moniliformin, a toxin produced by Fusarium, was investigated in 22 samples of corn, 17 coming from districts of the state of São Paulo and 4 from experimental plots of the Campinas Institute of Agronomy, Brazil. The toxin was also investigated in 68 samples of corn products commercialized in Campinas, SP. Moniliformin was not detected in any sample.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mycotoxins; Moniliformin; Corn; Fusarium toxins.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000100004
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The development of an analytical method for two mycotoxins, patulin and verruculogen, and survey of their presence in commercial tomato pulp BJM
Kawashima,Luciane M.; Soares,Lucia M. Valente; Massaguer,Pilar R. de.
The mycotoxin patulin causes gastroinstestinal distress, neurotoxic and immunotoxic effects in animals. It can be produced by several species of Penicillium, Aspergillus and Byssochlamys and it has been found in fruits, vegetables and cereals. Verruculogen is a toxin produced mainly by Penicillium and Aspergillus spp. and causes severe tremors in affected animals. Tomatoes are especially susceptible to fungi invasion and their products need to be investigated for possible mycotoxin contamination. A method for the determination of patulin and verruculogen in tomato products was developed involving an extraction with ethyl acetate, a cleanup by silica gel column and determination and confirmation by high performance liquid chromatography with diode array...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mycotoxins; Patulin; Verruculogen; Tomato products.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000300017
Registros recuperados: 5
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