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Registros recuperados: 102
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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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Aflatoxinas em milho armazenado em propriedades familiares de Minas Gerais. Repositório Alice
QUEIROZ, V. A. V.; CASTRO, I. M.; MENDES, S. M.; ALBERNAZ, W.; MIGUEL, R. A..
2013
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Micotoxina; Zea mays; Aflatoxins; Mycotoxins.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/976445
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Aflatoxins and fumonisins in feed from a broiler operation system from São Paulo state, Brazil Ciência Rural
Kobashigawa,Estela; Corassin,Carlos Humberto; Franco,Larissa Tuanny; Uliana,Rômulo Dutra; Oliveira,Carlos Augusto Fernandes de.
ABSTRACT: The aim of the present study was to assess the occurrence of aflatoxins (AFs) and fumonisins (FBs) in feed ingredients (corn and soybean meal) and finishing feed in a broiler operation system, as well was to evaluate their effect on the productivity of 20 batches of broilers produced and the histology status of broilers’ liver after slaughter. Corn samples presented the highest frequencies of AFs and FBs, at mean levels of 29.1 and 2,100µg/kg, respectively. Soybean samples presented mean levels of 1.5 and 70µg/kg for AFs and FBs, respectively. Batches of broilers receiving feed containing FB levels higher than 1,000µg/kg had lower weight gain and higher mortality rates, while those fed rations with AFs equal or above the limit of quantification...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mycotoxins; AFB1; FB1; Broiler chickens; Productivity.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000200652
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Aflatoxins, ochratoxin A and zearalenone in maize-based food products BJM
Sekiyama,Beatriz Leiko; Ribeiro,Alessandra Braga; Machinski,Paulo André; Machinski Junior,Miguel.
The occurrence of aflatoxins B1 (AFB1), B2 (AFB2 ), G1 (AFG1 ) and G2 (AFG2 ), ochratoxin A (OA) and zearalenone (ZEA) was evaluated in 121 maize-based food samples collected in the commerce of Maringá City, Paraná State, Brazil. The study was carried out between January 2002 and February 2003. Thin-layer chromatographic method was used to determine the mycotoxins. The recovery averages were 106.6%, 109.4%, 106.6%, 109.4%, 101.8% and 101.7% to AFB1, AFB2, AFG1, AFG2, OA and ZEA, respectively. Three samples (2.5%) were positive to AFB1 (8 to 59 µg/kg), two (1.7%) to AFB2 (2.4 µg/kg), one (0.8%) to OA (64 µg/kg) and one (0.8%) to ZEA (448 µg/kg). The greater frequency of positive samples and also the highest concentration of AFB1 were found in popcorn...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mycotoxins; Risk; Brazilian products derived from maize.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300016
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Agrometeorology of Groundnut Open Agri
Palavras-chave: Crops; Groundnuts; Drought stress; Mycotoxins; Genotypes; Weather hazards; Agrometeorology; Intercropping; Sole cropping.
Ano: 1986 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4039
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Antagonistic potential of microorganisms isolated from corn against Fusarium verticillioides. Repositório Alice
DINIZ, G. F. D.; AGUIAR, F. M.; SANTOS, K. K. B.; RIBEIRO, V. P.; GOMES, E. A.; COTA, L. V.; CURY, J. C.; MARRIEL, I. E.; OLIVEIRA, C. A..
bitstream/item/166023/1/Antagonistic-potential.pdf
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Biocontrole; Atividade antifúngica; Zea mays; Micotoxina; Mycotoxins.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1078763
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Aplicação de imagens hiperespectrais na detecção de fungos e na predição de micotoxinas em grãos de trigo. Infoteca-e
BARBEDO, J. G. A.; TIBOLA, C. S.; LIMA, M. I. P. M..
Estado da arte da detecção de doenças e micotoxinas em grãos de trigo utilizando imagens hiperespectrais. Métodos rápidos para detecção de giberela e predição do nível de DON. Discussão, tendências e perspectivas. Conclusões.
Tipo: Capítulo em livro técnico (INFOTECA-E) Palavras-chave: Espectroscopia de infravermelho próximo; Deoxinivalenol; Doenças em trigo; Detecção de giberela; Processamento de imagem; Imagens hiperespectrais; Image processing; Trigo; Micotoxina; Doença de Planta; Near-infrared spectroscopy; Wheat; Mycotoxins; Image analysis; Plant diseases and disorders.
Ano: 2018 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1110202
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Aplicação foliar de fungicidas e incidência de grãos ardidos e fumonisinas totais em milho. Repositório Alice
LANZA, F. E.; ZAMBOLIM, L.; COSTA, R. V. da; SILVA, D. D. da; QUEIROZ, V. A. V.; PARREIRA, D. F.; MENDES, S. M.; SOUZA, A. G. C.; COTA, L. V..
O objetivo deste trabalho foi avaliar a eficiência da aplicação foliar de fungicidas na redução da incidência de patógenos fúngicos, de grãos ardidos e de fumonisinas totais em grãos de milho (Zea mays). Foram conduzidos três ensaios: um no município de Luís Eduardo Magalhães, na Bahia, e dois em Sete Lagoas, em Minas Gerais, nas safras 2010/2011 e 2011/2012, com cultivo de diferentes híbridos comerciais. Os seguintes fungicidas foram aplicados zero, uma e duas vezes: picoxistrobina + ciproconazol, piraclostrobina + epoxiconazole, trifloxistrobina + tebuconazole, azoxistrobina + ciproconazol e tiofanato metílico. Em todos os ensaios, foram realizados a quantificação da incidência de grãos ardidos, o teste de patologia de sementes e a quantificação dos...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Patógeno fúngico; Controle químico; Doença fúngica; Fusarium; Fungo; Micotoxina; Zea mays; Fusarium; Zea mays; Chemical control; Mycotoxins; Plant pathogenic fungi.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1052548
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Avaliação da presença de desoxinivalenol em trigo no sul do Brasil. Repositório Alice
SANTOS, J. S.; PEDROLLO, D. G.; MALLMANN, C. A.; BASSOI, M. C.; PIRES, J. L.; SÓ e SILVA, M.; CAIERAO, E.; MIRANDA, M. Z.; ONO, E. Y. S.; ITANO, E. N.; KAWAMURA, O.; HIROOKA, E. Y..
2009
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Fusariose; Micotoxina; Cromatografia; Trigo; Wheat; Mycotoxins; Liquid chromatography.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/579096
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Avaliação microbiológica de amêndoas de castanha-do-brasil em usinas de beneficiamento no Acre. Repositório Alice
SOUZA, J. M. L. de; CARTAXO, C. B. da C.; LEITE, F. M. N.; REIS, F. S..
O objetivo desse estudo foi identificar os microrganismos responsáveis pela qualidade sanitária de castanha-do-Brasil em indústrias de processamento de castanha-do-brasil no Acre. Foram coletadas amostras nos meses de agosto de 2001 a maio de 2002, em cinco etapas do processamento.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Castanha do brasil; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Castanha do pará; Bertholletia excelsa; Microbiologia; Análise bacteriológica; Fruto; Qualidade; Processamento; Contaminação fúngica; Micotoxina; Aflatoxina; Aspergillus flavus; Brazil nuts; Fruit quality; Microbial contamination; Processing technology; Fungi; Mycotoxins; Aflatoxins; Nuez del Brasil; Calidad de la fruta; Contaminación microbiana; Micotoxinas; Aflatoxinas; Tecnología de procesamiento.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/502643
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Avaliação microbiológica de amêndoas de castanha-do-brasil em usinas de beneficiamento no Acre. Infoteca-e
SOUZA, J. M. L. de; CARTAXO, C. B. da C.; LEITE, F. M. N.; REIS, F. S..
Nativa da Região Amazônica, a castanheira (Bertholletia excelsa H.B.K.) é considerada uma das maiores riquezas nos estados que formam a Amazônia Brasileira. Um dos grandes problemas na conservação da castanha-do-brasil deve-se ao crescimento de fungos produtores de aflatoxinas e bactérias patogênicas, por causa das condições de umidade relativa e temperatura elevadas a que é submetida desde o momento da queda do ouriço. Assim, buscou-se identificar, em indústrias de processamento de castanha-do-brasil no Acre, os microrganismos responsáveis pela qualidade sanitária, especialmente os do grupo coliformes, bactérias mesáfilas, bolores e leveduras. Foram coletadas amostras nos meses de agosto de 2001 a maio de 2002, em cinco etapas do processamento. As...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Castanha do brasil; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Castanha do pará; Bertholletia excelsa; Microbiologia; Análise bacteriológica; Fruto; Qualidade; Processamento; Contaminação fúngica; Micotoxina; Aflatoxina; Aspergillus flavus; Brazil nuts; Fruit quality; Microbial contamination; Processing technology; Fungi; Mycotoxins; Aflatoxins; Nuez del Brasil; Calidad de la fruta; Contaminación microbiana; Micotoxinas; Aflatoxinas; Tecnología de procesamiento.
Ano: 2004 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/501670
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Biogenic amines and mycotoxins concentrations in baled silage from organic and conventional farms Arq. Bras. Med. Vet. Zootec.
Jovaišienė,J.; Bakutis,B.; Baliukonienė,V.; Matusevičius,P.; Lipiński,K.; Antoszkiewicz,Z.; Fijałkowska,M..
ABSTRACT The aim of the current study was to investigate biogenic amines and mycotoxins concentrations in baled silage (mainly Poaceae family grasses) prepared in organic and conventional farms and to relate these parameters to fermentative parameters. The mean dry matter (DM) content was 364.10±93.31 and 424.70±95.93g/kg in the silage from organic and conventional farms respectively. The silage samples from organic farms had 17.00% higher (P≤ 0.05) tyramine (TY) than the silage from conventional farms. Conventional farm samples were characterized by 46.00% higher histamine (HIS) (P≤ 0.05), 9.80% higher putrescine (PUT) (P≤ 0.05), 17.30% higher cadaverine (CAD) (P≤ 0.05). Aflatoxins (AFL) (total) and zearalenone (ZEN), T-2/HT-2 concentrations were higher...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogenic amines; Mycotoxins; Volatile fatty acids; Organic farm; Conventional farm.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000200269
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Biological control of mycotoxin-producing molds. Repositório Alice
MEDEIROS, F. H. V.; MARTINS, S. J.; ZUCCHI, T. D.; MELO, I. S. de; BATISTA, L. R.; MACHADO, J. da C..
Mycotoxins are produced by the secondary metabolism of many fungi and can be found in almost 25% of the world?s agricultural commodities. These compounds are toxic to humans, animals, and plants and therefore, efforts should be made to avoid mycotoxin contamination in food and feed. Besides, up to 25% of all harvested fruits and vegetables are lost due to storage molds and/ or mycotoxin contamination and many methods have been applied to mitigate these issues, but most of them rely on the use of fungicides. Although chemicals are often the first defensive line against mycotoxigenic fungi, the indiscriminate use of fungicides are awakening the public perception due to their noxious effects on the environment and human/animal health. Thus, there is an...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Biocontrol; Microbial antagonists; Postharvest decay; Agentes de biocontrole; Microrganismos antagonistas; Perda em pós-colheita; Micotoxina; Fungo; Controle biológico; Segurança alimentar; Mycotoxins; Biological control; Food safety.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/942573
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Bromatological and mycotoxin analysis on soybean meal before and after the industrial process of micronization Ciência Rural
Daga,Andressa; Horn,Marcelina Bottoni; Kottwitz,Luciana Bill Mikito; Fariña,Luciana Oliveira de.
Aflatoxins, fumonisins and zearalenone take part of the most studied mycotoxin groups due to their toxic effects on animal and human health. This research evaluated samples of soybeans meal used in animal food industry. A hundred and twenty one soybean meal samples were analyzed, so that 66 were analyzed before the industrial processing of micronization and 55 after it. The bromatological average of samples before micronization showed the following answers: 12.4% moisture; 46.4% protein; 79.5% protein solubility; 5.9% ash content; 2.2% fat; 4.3% fiber and 0.02 (ΔpH) of urease activity. The samples of micronization soybean meal showed 7.0% average values for moisture and 48.6% for crude protein. The mycotoxin levels were low in natura soybean meal;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mycotoxins; Micronization soybean meal; Animal feedstuff..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000701336
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Can Bt Maize Reduce Exposure to the Mycotoxin Fumonisin in South Africa? AgEcon
Pray, Carl E.; Rheeder, John; Gouse, Marnus; Volkwyn, Yvette; van der Westhuizen, Liana; Shephard, Gordon.
The mycotoxin fumonisin is associated with oesophageal cancer and birth defects. The Eastern Cape province of South Africa has high levels of fumonisin in maize and oesophageal cancer. This study measures the amounts of the mycotoxin fumonisin in the grain of Bt maize, commercial hybrids, and farmer-saved, local mixtures of seed that were produced and stored by small holders in South Africa. We find that adoption of Bt maize can reduce poor rural consumers exposure to fumonisin. Greater consumption of maize meal milled in modern mills could have a similar impact.
Tipo: Conference Paper or Presentation Palavras-chave: Bt maize; Mycotoxins; Fumonisin; South Africa; Agricultural and Food Policy; Health Economics and Policy; International Development.
Ano: 2009 URL: http://purl.umn.edu/51739
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Characterisation of mycoflora and aflatoxigenic fungi from portuguese almonds: from production to commercialization. IPB - Escola Superior Agrária
Rodrigues, Paula; Venâncio, Armando; Lima, Nelson.
Aflatoxins are among the most carcinogenic natural compounds known, and have been frequently detected in numerous agricultural commodities, nut fruits being among the most contaminated ones. These toxins are a result of the secondary metabolism of fungi belonging to the genus Aspergillus Section Flavi, namelly Aspergillus flavus, A. parasiticus and A. nomius. The early detection of aflatoxigenic fungal contamination and the preventive control of aflatoxin production seems to be the only viable way to respond to the rigorous limits imposed by EU legislation. In Portugal, knowledge on mycoflora and mycotoxigenic profiles of almonds is scarce. Our objective was to characterise portuguese almonds in respect to mycoflora, with strong emphasis on aflatoxigenic...
Tipo: ConferenceObject Palavras-chave: Mycobiota; Mycotoxins.
Ano: 2009 URL: http://hdl.handle.net/10198/4279
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Common resistance to Fusarium head blight in Brazilian wheat cultivars Scientia Agricola
Mendes,Gabriela da Rocha Lemos; Ponte,Emerson Medeiros Del; Feltrin,Ana Carla; Badiale-Furlong,Eliana; Oliveira,Antônio Costa de.
ABSTRACT: Mycotoxin levels in Fusarium head blight (FHB) infections can be difficult to quantify. The relationship between mycotoxin and disease is not consistent and it is not clear if wheatpathogen interaction is of significance in regions where more than one Fusarium species with distinct trichothecene production ability co-exists. This study aimed to investigate whether a set of eight Brazilian wheat genotypes, varying in resistance according to classification by the breeder, exhibit a common or differential resistance to Fusarium graminearum (Fgra) (deoxynivalenolproducing) and Fusarium meridionale (nivalenol-producing) (Fmer) using full-spike and central spikelet inoculation (type II resistance). Fgra was generally more aggressive than Fmer based on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Visual assessment; Spray-inoculation; Point-inoculation; Mycotoxins.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000500426
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Comparison of the efficiency between two sampling plans for aflatoxins analysis in maize BJM
Mallmann,Adriano Olnei; Marchioro,Alexandro; Oliveira,Maurício Schneider; Rauber,Ricardo Hummes; Dilkin,Paulo; Mallmann,Carlos Augusto.
Variance and performance of two sampling plans for aflatoxins quantification in maize were evaluated. Eight lots of maize were sampled using two plans: manual, using sampling spear for kernels; and automatic, using a continuous flow to collect milled maize. Total variance and sampling, preparation, and analysis variance were determined and compared between plans through multifactor analysis of variance. Four theoretical distribution models were used to compare aflatoxins quantification distributions in eight maize lots. The acceptance and rejection probabilities for a lot under certain aflatoxin concentration were determined using variance and the information on the selected distribution model to build the operational characteristic curves (OC). Sampling...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mycotoxins; Variance; Error; Characteristic operation curve; Zea mays.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100006
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Comparison of thin-layer chromatography, spectrofluorimetry and bright greenish-yellow fluorescence test for aflatoxin detection in corn BABT
Ono,Elisabete Yurie Sataque; Silva,Marcelo da; Ribeiro,Ricardo Marcelo Reche; Ono,Mario Augusto; Hayashi,Luciana; Garcia,Glauco Tironi; Hirooka,Elisa Yoko.
In this study the bright greenish-yellow fluorescence test, widely used by the corn milling industry, was compared to the thin-layer chromatography (TLC) and spectrofluorimetry methods for aflatoxin detection in 40 corn samples naturally contaminated by the Aspergillus section Flavi. According to the corn processing industry criteria, all the samples were adequate for human and animal consumption by the bright greenish-yellow fluorescence test, but TLC and spectrofluorimetry analysis detected aflatoxins above the maximum tolerated limit (20 µg/kg) in 7 and 8 samples, respectively. Aflatoxins were detected in 16 (40%) corn samples by TLC, with levels ranging from 4.0 to 54.0 µg/kg (mean 19.97 ± 15.97 µg/kg), and in 25 (62.5%) samples by spectrofluorimetry,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Thin-Layer Chromatography; Spectrofluorimetry; BGYF; Aflatoxins; Corn; Mycotoxins.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300025
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Conservation, evaluation and dissemination of groundnut germplasm and foundation seed production and distribution for the West African region Open Agri
B.R..
Palavras-chave: Genes; Seed production; Groundnuts; ADP; Germplasm; Genetic resources; Breeders seed; Mycotoxins; Gene banks; Variety trials.
Ano: 2003 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4228
Registros recuperados: 102
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