Seleção Eletrônica Pela Cor Na Descontaminação De Amendoim Contaminado Com Aflatoxinas

Zovico, Cristiane; Fonseca, Homero; Calori‐Domingues, Maria Antonia; Glória, Eduardo Micotti da; Borguini, Renata Galhardo; Silveira, Vanessa Prezzotto; Piedade, Sônia S.

doi:10.1590/s0103-90161999000200016

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…** e *Significativo a 1 e 5% de probabilidade, pelo teste t. No experimento I, embora a percentagem de grãos sem defeito não tenha apresentado correlação significativa com a ocorrência de aflatoxinas, verificouse alto efeito direto (0,54 e 0,82, em sacaria e em silo metálico, respectivamente). Este efeito ocorreu principalmente em razão do efeito indireto do conteúdo de cinzas, o que indica que grãos sem defeitos também são acometidos pela toxina, relação também afirmada por Zovico et al (1999). No experimento II, ocorreu o fato inverso, pois, a correlação foi significativa e de média magnitude, e não houve efeito direto significativo, principalmente em razão dos efeitos indiretos da incidência dos fungos Penicillium sp., Aspergillus sp.…”

Section: Resultsunclassified

Análise de trilha da contaminação por aflatoxinas em grãos de milho armazenados

Domênico

Danner

Busso

et al. 2015

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi determinar a magnitude dos efeitos diretos e indiretos de parâmetros físico-químicos e microbiológicos sobre a ocorrência de aflatoxinas em grãos de milho armazenados, por meio da análise de trilha. Os dados foram coletados em dois experimentos: um cultivo de inverno (colheita do milho em julho de 2012) e um cultivo de verão (colheita em fevereiro de 2013). Os grãos foram armazenados por 12 meses, em dois tipos de acondicionamentos: em sacarias convencionais de polipropileno e a granel em silo metálico. Avaliaram-se 14 características dos grãos. Calculou-se a matriz de correlações de Pearson entre todos os parâmetros, realizou-se o diagnóstico de multicolinearidade e, posteriormente, aplicou-se a análise de trilha com regressão em crista. Observou-se forte influência das condições ambientais entre as safras de inverno e de verão, e entre época e tipo de armazenagem, nos coeficientes de análise de trilha. As variáveis teor de umidade, conteúdo de cinzas, proteínas, lipídios, grãos sem defeitos, massa volumétrica, incidência de Penicillium sp., Aspergillus sp. e Fusarium sp. devem ser consideradas conjuntamente na definição da possibilidade de ocorrência de aflatoxinas na massa de grãos armazenados.Termos para indexação: Zea mays, armazenagem, micotoxinas, multicolinearidade. Path analysis of aflatoxin contamination on stored maize kernelsAbstract -The objective of this work was to determine the magnitude of the direct and indirect effects of the physicochemical and microbiological parameters on the occurrence of aflatoxins on stored maize kernels, through path analysis. Data were collected in two experiments: one winter crop (maize harvest in July 2012) and one summer crop (harvest in February 2013). Grains were stored for 12 months in two types of packaging: in conventional polypropylene sacks and bulk storage in metallic silo. Fourteen grain characteristics were evaluated. The matrix of Pearson's correlations was calculated between all parameters, the diagnosis of multicollinearity was performed, and subsequently path analysis was applied with ridge regression. A strong influence of environmental conditions was observed between winter and summer crops, and between season and type of storage, in path analysis coefficients. The variables moisture content, ash, proteins, lipids, undamaged kernels, volumetric weight, incidence of Penicillium sp., Aspergillus sp., and Fusarium sp. should be considered together for defining the probability of aflatoxin occurrence in the bulk of stored kernels.

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Section: Resultsunclassified

Análise de trilha da contaminação por aflatoxinas em grãos de milho armazenados

Domênico

Danner

Busso

et al. 2015

Pesq. agropec. bras.

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“…There was a slightly better moisture loss in jute bags compared to polyethylene bags. Electronic color sorting was efficient in eliminating highly contaminated lots, directing them to rejected portions, although there was no obvious improvement in the overall initial contamination (130). The presence of A. flavus in corn enhanced growth of mites which, in turn, efficiently dispersed viable fungal spores from the inoculated to the uncontaminated compartments (33).…”

Section: Prevention Control and Effects Of Processingmentioning

confidence: 99%

Mycotoxin research in Brazil: the last decade in review

Rodriguez–Amaya

Sabino

2002

Braz. J. Microbiol.

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The number of research papers (128 papers) on mycotoxins published by Brazilian researchers in 1991-2000 surpassed the total number (85 papers) published in the preceding three decades . Thirty percent of the papers surveyed mycotoxins in foods and feeds. AFs in peanut and peanut products continued to be alarming, and high incidence and levels of FBs in corn and corn products also appeared as a serious problem. Contamination with other toxins, such as ZEA, OTA and trichothecenes, was low. Occurrence of AFM 1 in milk and dairy products and patulin in apple juice needs to be verified as the results are somewhat diverging. Work on analytical methods, mycological examination and toxic effects constituted 16, 13 and 13%, respectively, of the published papers in the decade assessed. Attempts to find means of preventing/controlling fungal growth and mycotoxin production notably increased, making up 27% of the papers, including investigations on influencing factors (e.g. genotype resistance, water content/a w , relative humidity, temperature, presence of metals, type of soil, mite infestation) and antagonistic potential of other microorganisms against mycotoxin-producing fungi. Effects of plant extract, flavonoids, fungicides and other chemicals, storage bag material, adsorbents, cooking and processing of food were also studied. Thus, notwithstanding constraints on resources, Brazilian research responds to the needs of the country, reflects international concerns and recent developments in the area.

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“…The automatic sorting applicability needs to be evaluated since the high costs involved in its use could lead to inviability if there is a small scale production. On top of that, other studies have shown that computerized sorting showed no substantial improvement in the initial middium levels of contamination in peanuts batches, for example, which showed the widespread aflatoxin contamination (ZOVICO et al, 1999). Therefore, the efficiency evaluation in the sorting stages is important since in the case of other kinds of nuts these steps have shown the advantage of preventing contamination by aflatoxin.…”

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confidence: 99%