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	Provedor de dados Ciênc. Tecnol. Aliment. (1) Rev. Bras. Ciênc. Solo (1) Autor Hoeltz,Michele (1) Noll,Isa Beatriz (1) Novais,Roberto Ferreira (1) Ritter,Ana Carolina (1) Silva,Ivo Ribeiro da (1) Silva,Mailson Félix de Oliveira (1) Soares,Emanuelle Mercês Barros (1) Souza,Matheus Fonseca de (1) Mais... Palavra-chave Incubation time (2) Aflatoxin-producing (1) Aspergillus flavus (1) Culture media (1) Latosol (1) Organic acids (1) PH (1) Stirred-flow (1) Temperature (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2014 (1) 2011 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Toxigenic potential of Aspergillus flavus tested in different culture conditions Ciênc. Tecnol. Aliment. Ritter,Ana Carolina; Hoeltz,Michele; Noll,Isa Beatriz. The objective of the present work was to evaluate the capacity of three isolates of Aspergillus flavus to produce aflatoxin under different culture conditions. This experiment was based on a 2³ factorial design, in which the independent variables were temperature (20-40 °C), incubation time (7-21 days), and the pH (2.0-6.0) in two different synthetic media. The optimal conditions were applied to non-aflatoxigenic isolates previously tested in coconut agar. Aflatoxin B1 was extracted directly from the synthetic cultures with chloroform. Thin Layer Chromatography (TLC) and Photographic Photometry were utilized to identify and quantify the compounds. Preliminary results showed that YES agar was an alternative medium for detecting the toxigenic potential of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aspergillus flavus; Aflatoxin-producing; Incubation time; Temperature; PH; Culture media. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000300011 Competitive sorption and desorption of phosphate and citrate in clayey and sandy loam soils Rev. Bras. Ciênc. Solo Souza,Matheus Fonseca de; Soares,Emanuelle Mercês Barros; Silva,Ivo Ribeiro da; Novais,Roberto Ferreira; Silva,Mailson Félix de Oliveira. The increase of organic acids in soils can reduce phosphorus sorption. The objective of the study was to evaluate the competitive sorption of P and citrate in clayey and sandy loam soils, using a stirred-flow system. Three experiments were performed with soil samples (0-20 cm layer) of clayey (RYL-cl) and sandy loam (RYL-sl) Red Yellow Latosols (Oxisols). In the first study, the treatments were arranged in a 2 × 5 factorial design, with two soil types and five combinations of phosphorus and citrate application (only P; P + citrate; and citrate applied 7, 22, 52 min before P); in the second, the treatments were arranged in a 2 × 2 factorial design, corresponding to two soils and two forms of P and citrate application (only citrate and citrate + P); and in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Incubation time; Latosol; Organic acids; Stirred-flow. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400011 Registros recuperados: 2 Primeira ... 1 ... Última

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