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A method for the determination of two Alternaria toxins, alternariol and alternariol monomethyl ether, in tomato products 58
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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Aflatoxins and fumonisins in feed from a broiler operation system from São Paulo state, Brazil 65
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 58
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 30
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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Aplicação de imagens hiperespectrais na detecção de fungos e na predição de micotoxinas em grãos de trigo. 14
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: Parte de livro 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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Avaliação microbiológica de amêndoas de castanha-do-brasil em usinas de beneficiamento no Acre. 14
SOUZA, J. M. L. de; CARTAXO, C. B. da C.; LEITE, F. M. N.; REIS, F. S..
Considerando a importância econômica e social da castanha-do-brasil para a região, bem como as condições em que este produto é manipulado, favorecendo sua contaminação biológica, este trabalho teve como objetivo detectar a presença de microrganismos patogênicos deteriorantes em castanhas-do-brasil e nas amêndoas em diferentes pontos do fluxo de produção nas indústrias de beneficiamento.
Tipo: Folhetos Palavras-chave: Castanha do brasil; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Contaminación microbiana; Calidad de la fruta; Aflatoxinas; Micotoxinas; Nuez del Brasil; Tecnología de procesamiento; 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.
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 45
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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Bromatological and mycotoxin analysis on soybean meal before and after the industrial process of micronization 65
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? 31
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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Common resistance to Fusarium head blight in Brazilian wheat cultivars 63
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 58
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 52
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 30
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
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Consumers’ willingness to pay for food safety: the case of mycotoxins in milk 31
Sckokai, Paolo; Moro, Daniele; Cuomo, Enrica.
European statistics show that one of the most widespread source of health risks related to food is mycotoxins. The objective of this paper is to evaluate the Italian consumers’ perception of the mycotoxins’ risk and, more specifically, their willingness-to-pay (WTP) for a hypothetical bottle of milk obtained by cows in which the feed ration contains maize certified for the ‘good practices’ that reduce such risk. For this purpose, a web-based stated choice (SC) experiment involving a representative sample of 973 Italian consumers has been carried out and WTP has been measured using the panel data version of a Random Parameters Logit (RPL) model. The results show that Italian consumers are willing to pay a rather high average price premium for...
Tipo: Conference Paper or Presentation Palavras-chave: Food safety; Mycotoxins; Willingness to pay; Mixed logit; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; C35; D12.
Ano: 2010 URL: http://purl.umn.edu/116411
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Contaminação por aflatoxinas em milho utilizado na alimentação de suínos. 14
FIORENTIN, L.; FREITAS, A. R. de; FIALHO, E. T..
Tipo: Folhetos Palavras-chave: Coleta de amostra; Ration; Método; Amostragem; Nutrição animal; Ração; Micotoxina; Fungo; Milho; Suíno; Contaminação; Methodology; Sampling; Animal nutrition; Mycotoxins; Fungi; Corn; Swine.
Ano: 1987 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/435455
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Deoxynivalenol in wheat and wheat products from a harvest affected by fusarium head blight 116
MACHADO,Lidiane Viera; MALLMANN,Carlos Augusto; MALLMANN,Adriano Olnei; COELHO,Raquel Durand; COPETTI,Marina Venturini.
Abstract Fusarium head blight is an important disease occurring in wheat, caused mainly by the fungus Fusarium graminearum. In addition to direct damage to crops, reduced quality and yield losses, the infected grains can accumulate mycotoxins (toxic metabolites originating from prior fungal growth), especially deoxynivalenol (DON). Wheat crops harvested in 2014/2015 in southern Brazil were affected by high levels of Fusarium head blight. In this context, the aim of this study was evaluate the mycotoxicological quality of Brazilian wheat grains and wheat products (wheat flour and wheat bran for DON. DON contamination was evaluated in 1,504 wheat and wheat product samples produced in Brazil during 2014. It was determined by high performance liquid...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fusarium; Mycotoxins; Fungal diseases; Scab; Fusarium head blight.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000100008
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Determinação de agrotóxicos e ocratoxina A em café arábica sob diferentes níveis de torrefação. 14
ROSA, J. S. da; FREITAS-SILVA, O.; CAMPOS, R. da S.; CASTRO, I. M. de; TEIXEIRA, A. da S..
O café é a segunda maior commodity do mundo e tamanha importância faz do café uma matriz alimentar muito estudada. A necessidade de incremento na produtividade dessa cultura, porém, pode aumentar o uso de alguns agrotóxicos em sistemas de produção de café. Da mesma forma, as práticas de colheita e processamento pós-colheita do café estão diretamente relacionadas à contaminação dos grãos por fungos micotoxigênicos. Rastrear a presença destes dois tipos de contaminantes em amostras de café Arábica comum (com diferentes teores de grãos defeituosos) e submetidos a diferentes níveis de torra foi o objetivo deste trabalho. Os agrotóxicos foram analisados pelo método multirresíduo, por espectrometria de massas sequencial, e a ocratoxina A, por cromatografia...
Tipo: Folhetos Palavras-chave: Contaminante; Cromatografia líquida de alta eficiência; Micotoxina; Coffea Arábica; Tecnologia de Alimento; Espectrometria; Cromatografia; Food technology; Vegetable products; High performance liquid chromatography; Mycotoxins; Mass spectrometry; Poisoning; Agrochemicals.
Ano: 2019 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112112
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Effect of Bacillus spp. on Aspergillus westerdijkiae growth, sporulation and ochratoxin A production in green-coffee medium 116
EINLOFT,Tiago Centeno; OLIVEIRA,Patrícia Bolzan de; VERAS,Flávio Fonseca; WELKE,Juliane Elisa; MALLMANN,Carlos Augusto; DILKIN,Paulo; DIONELLO,Rafael Gomes.
Abstract Aspergillus westerdijkiae is one of the most important spoilage and toxigenic fungi contaminating coffee beans and may produce ochratoxin A (OTA), a mycotoxin that characterize a health risk to the coffee consumers. Biological control strategies can be used for prevention of fungal invasion and decrease mycotoxin exposure. The aims of this study were to evaluate the in vitro effect of three Bacillus sp. biocontrol candidates on A. westerdijkiae mycelial growth, spore counts and OTA production. A green-coffee based medium was inoculated with A. westerdijkiae and Bacillus spp. (B. safensis RF69, B. amyloliquefaciens RP103 and B. subtilis RP242) and after incubation, the fungal growth, sporulation and mycotoxin production was evaluated. Mycelial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological control; Food mycology; Mycotoxins; Fungi; Food safety.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000700024
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Effect of harvest timing and postharvest storage conditions on aflatoxin contamination in groundnuts harvested from the Wonogiri regency in Indonesia 30
Rahmianna,A.A.
Palavras-chave: Mycotoxins; Groundnuts; ELISA; Polymers; Retail marketing; Sampling; Storage; Harvesting; Fungi; Quality.
Ano: 2007 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3358
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Effects of mycotoxin adsorbents in aflatoxin B 1 - and fumonisin B 1 -contaminated broiler diet on performance and blood metabolite 96
Sobrane Filho,Sérgio Turra; Junqueira,Otto Mack; Laurentiz,Antonio Carlos de; Filardi,Rosemeire da Silva; Rubio,Marcela da Silva; Duarte,Karina Ferreira; Laurentiz,Rosangela da Silva de.
ABSTRACT The present study examined the effect of aflatoxin (AFB1) and fumonisin (FB1) at the levels of 2 mg kg−1 AFB1 and 100 mg kg−1 FB1 and the efficiency of use of different levels of adsorbent based on sodium and calcium aluminosilicate on growth performance, hematological parameters, and biochemical parameters of broilers. A total of 1,440 Cobb broilers were distributed into the following treatments: positive control (PC) - no mycotoxin and adsorbent (AD); PC+3AD - no mycotoxin, with 3 g kg−1 adsorbent in feed; negative control (NC) - only mycotoxin; NC+1AD - with mycotoxin and 1 g kg−1 adsorbent in feed; NC+2AD - with mycotoxin and 2 g kg−1 adsorbent in feed; and NC+3AD - with mycotoxin and 3 g kg−1 adsorbent in feed. The amounts of AFB1 and FB1...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biochemical parameter; Feeding; Growth performance; Hematological parameter mycotoxicosis; Mycotoxins.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000500250
Registros recuperados: 80
Primeira ... 1234 ... Última
 

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