Consulta: subjectFacets:"Mycotoxins"
Registros recuperados: 71
Data/hora: 09/06/2024 05:38:04

Morphological and chemical diversity in the Type IV glandular trichomes of Solananeae (S. sisymbrifolium and N. glauca) as germplasm resources for agricultural and food uses
Provedor de dados: 69
Autores: Cesio,Verónica; Dutra,Carmelo; Moyna,Patrick; Heinzen,Horacio.
Morphological variation in type IV trichomes in Ss and Ng was studied through SEM. The differences can be related to chemical differences in the excreted sugar esters. Ng trichomes exude two fractions, one of glucose tri-esters and the other one of sucrose tetra-esters, in a 3:7 ratio. The main acid found forming these esthers, is 3-methylvalerianic acid, in consonance to those secreted by other Solanaceae. Esters from Ss are novel structures, which can also be separated into three fractions, two of arabinoxylans, and the other one of arabinose, all glycosilated with &amp;beta;-hydroxipalmitic acid and sterified with the C12-C16 acids. All five fractions have antifungic activity at &amp;#956;g/cm² concentrations, both against common and mycotoxigenic...
Tipo: Journal article
Palavras-chave: Antifungic activity; Interespecies variability; Mycotoxins; Sugar esters.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300021

Ocorrência de fumonisinas em milho armazenado em propriedades familiares da região Central de Minas Gerais.
Provedor de dados: 14
Autores: QUEIROZ, V. A. V.; ALVES, G. L. de O.; CONCEIÇÃO, R. R. P. da; MENDES, S. M.; COSTA, R. V. da; RIBEIRO, P. E. de A.
bitstream/item/95159/1/circ-198.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Aspergillus niger; Fungo; Micotoxina; Fungi; Mycotoxins.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/975580

Secador estacionário a ar aquecido forçado artificialmente: inovação tecnológica na secagem de sementes de castanheira-da-amazônia (Bertholletia excelsa).
Provedor de dados: 14
Autores: GONCALVES, R. C.; ALVARES, V. de S.; CARTAXO, C. B. da C.; WADT, L. H. de O.; SOUZA, J. M. L. de; LIMA, A. C. de; COSTA, D. A. da; GIACOMELLI, M.; MAGALHÃES, K. da S.; MADRUGA, A. L. S.
Bertholletia excelsa Bonpl., também conhecida como castanheira-do-brasil, castanheira-do-pará e castanheira-da-amazônia, é uma árvore que ocorre naturalmente em grande parte da Amazônia. Entretanto, a presença de aflatoxinas B1, B2, G1 e G2 de Aspergillus spp. em amostras de castanha-do-brasil com casca e sem casca, em níveis superiores àqueles considerados seguros por países importadores, tem limitado as exportações desse produto, além de restringir o mercado interno. A presença dessas aflatoxinas nas castanhas depende da infecção e colonização dos tecidos da semente por fungos Aspergillus spp. Níveis de fatores ambientais próximos aos favoráveis à produção de aflatoxinas são encontrados na Floresta Amazônica, durante a época de queda dos frutos e...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Castanha do brasil; Secador estacionário; Secadores de convección; Temperatura de secado.; Calidad de la fruta; Aflatoxinas; Secagem natural; Nuez del Brasil; Micotoxinas; Cáscaras de fruta; Aspergillus flavus; Secagem artificial; Resistência a temperatura; Contaminação fúngica; Micotoxina; Aflatoxina.; Castanha do pará; Bertholletia excelsa; Fruto; Qualidade; Casca; Propriedade físico-química; Aflatoxins.; Fruit peels; Fruit quality; Brazil nuts; Fungi; Drying temperature; Mycotoxins; Convection dryers.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/872684

Contaminação por aflatoxinas em milho utilizado na alimentação de suínos.
Provedor de dados: 14
Autores: FIORENTIN, L.; FREITAS, A. R. de; FIALHO, E. T.
bitstream/item/68407/1/DMeu-DiscoCNPSA-COM.-TEC.-115-87CNPSA-COM.-TEC.-115-87.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
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

Histórico e perspectivas das doenças na cultura do milho.
Provedor de dados: 14
Autores: COTA, L. V.; COSTA, R. V. da; SABATO, E. de O.; SILVA, D. D. da.
bitstream/item/95066/1/circ-193.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Doença de planta; Zea mays; Inseto; Micotoxina; Plant diseases and disorders; Insecta; Mycotoxins.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/975363

Aplicação de imagens hiperespectrais na detecção de fungos e na predição de micotoxinas em grãos de trigo.
Provedor de dados: 14
Autores: 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

Avaliação microbiológica de amêndoas de castanha-do-brasil em usinas de beneficiamento no Acre.
Provedor de dados: 14
Autores: 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; Nuez del Brasil; Calidad de la fruta; Tecnología de procesamiento.; Aflatoxinas; Micotoxinas; Contaminación microbiana; 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

Micotoxinas no trigo.
Provedor de dados: 14
Autores: BERNARDI, C. M. G.; RESENDE, D. de O.; ALBUQUERQUE, A. C. S.; TIBOLA, C.
bitstream/item/182002/1/ID44354-2018FLmicotoxinas.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Micotoxina; Trigo; Cereal; Legislação; Mycotoxins; Wheat; Laws and regulations.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1094602

Determinação de agrotóxicos e ocratoxina A em café arábica sob diferentes níveis de torrefação.
Provedor de dados: 14
Autores: 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: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
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

Validação de métodos para determinação de zearalenona e fumonisinas totais por fluorimetria em amostras reduzidas de milho.
Provedor de dados: 14
Autores: RIBEIRO, P. E. de A.; QUEIROZ, V. A. V.; COSTA, C. L. dos S.; COSTA, R. V. da.
Dois métodos para determinação de micotoxinas em grãos de milho foram internamente validados com base nos critérios: limite de detecção (LD), limite de qualificação (LQ), linearidade, recuperação, repetitividade e estabilidade. Zearalenona e fumonisinas foram extraídas a partir de quantidades reduzidas de amostra, passadas através de colunas de imunoafinidade específicas, eluídas e quantificadas em fluorímetro. Para a zearalenona, LD e LQ foram 0,02 mg kg-1 e 0,07 mg kg-1, respectivamente, a recuperação das amostras fortificadas de milho foi maior do que 78%, o coeficiente de variação (CV) foi de 4,9% e uma correlação linear foi encontrada entre as leituras e os níveis de fortificação, com coeficiente de correlação r =0,997. Para fumonisinas totais, os...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Fungal toxins.; Micotoxina; Resíduo; Fungo; Zea mays; Mycotoxins; Fungi.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/974134

Toxicity assessment of peptaibols and contaminated sediments on Crassostrea gigas embryos
Provedor de dados: 5
Autores: Poirier, Laurence; Quiniou, Francoise; Ruiz, Nicolas; Montagu, Monique; Amiard, Jean-claude; Pouchus, Yves François.
Peptaibols are known membrane-modifying peptides that were recently detected in marine sediments and mussels collected from a shellfish farming area (Fier d'Ars, Atlantic coast, France). In this investigation, embryotoxicity bioassays with oysters (Crassostrea gigas) were performed to assess acute toxicity of alamethicin and different groups of peptaibols produced by a Trichoderma longibrachiatum strain isolated from marine environment. C gigas embryos appeared very sensitive to all the metabolites examined with higher toxic effects for long-sequence peptides (EC50 ranging from 10 to 64nM). D-shaped larvae with mantle abnormality were particularly noticed when peptaibol concentrations increased. Disturbances of embryogenesis were also observed following...
Tipo: Text
Palavras-chave: Risk assessment; Embryotoxicity; Bivalve bioassay; Mycotoxins; Marine fungi.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2680.pdf

Toxic thermoresistant metabolites of Fusarium oxysporum are capable of inducing histopathological alterations in Wistar rats
Provedor de dados: 80
Autores: Hernandes,L; Marangon,AV; Salci,T; Svidzinski,TIE.
The genus Fusarium is known to produce mycotoxins that cause fusariosis in plants, animals and humans. Mycotoxins are among the virulence factors of this genus. Metabolic extracts of Fusarium oxysporum, isolated from a patient with onychomycosis and sterilized by filtration or autoclave, were inoculated intradermally into Wistar rats at concentrations of 0.25, 0.5 and 1 µg/µL, and the effects on their tegument were observed at 24 and 72 hours. After histological procedures and staining by hematoxylineosin, the sections were studied for their inflammatory-reaction intensity and for evidence of injury and tissue distortion. Inflammatory reactions in the dermis and the subcutaneous tissue were observed at all concentrations of the inoculated extract tested....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fungal skin disease; Fusarium; Mycotoxins.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992012000200003

Summary Proceedings of the First ICRISAT Regional Groundnut Meeting for West Africa
Provedor de dados: 30
Palavras-chave: Groundnuts; Mycotoxins; Breeds (animals); Drought resistance; Weather hazards; Genotypes; Sole cropping; Fungi; Early maturation.
Ano: 1990
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4078

Summary Proceedings of the Second ICRISAT Regional Groundnut Meeting for West Africa
Provedor de dados: 30
Palavras-chave: Groundnuts; Yield losses; Mycotoxins; Early maturation; Flours; Breeds (animals); Genotypes; Variety trials; Sole cropping.
Ano: 1991
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4091

Genes are gems:reporting agri-biotechnology
Provedor de dados: 30
Autores: R.L.
Palavras-chave: Biotechnology; Transgenics; Genes; DNA; Mycotoxins; Chickpeas; Transgenic plants; Genetic markers; Genetic engineering; Genomes.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4146

Knowledge and adoption of aflatoxin management practices in groundnut farming in Junagadh, Gujarat, India
Provedor de dados: 30
Autores: Kumar, G.D.S.,( G.D. Satish Kumar ).
Palavras-chave: Mycotoxins; Groundnuts; Seed treatment; Biological control; Quality; Control methods; Fungi; Sampling; Oils; Tropical zones.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3296

Groundnut Elite Germplasm ICGV 88145 and ICGV 89104 •
Provedor de dados: 30
Palavras-chave: Mycotoxins; Wet season; Breeds (animals); Germplasm; Fungi; Seasons; Proteins; Weather hazards; Research methods; Plant habit.
Ano: 1994
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3857

Summary and Recommendations of the Asian Region Groundnut Scientists' Meeting
Provedor de dados: 30
Palavras-chave: Groundnuts; Mycotoxins; Photoperiodicity; Germplasm; Soil ph; Weather hazards; Genotypes; Postharvest technology; Quarantine; Tolerance.
Ano: 1989
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4071

Evaluation of the effects of plant diseases on yield and nutritive value of crop residues used for peri-urban dairy production on the Deccan Plateau of India
Provedor de dados: 30
Autores: S.
Palavras-chave: Sorghum; Groundnuts; Mycotoxins; Crop residues; Genotypes; Milk; Animal health; Dry matter; Nutritive value; Grain.
Ano: 2003
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4229

Effect of harvest timing and postharvest storage conditions on aflatoxin contamination in groundnuts harvested from the Wonogiri regency in Indonesia
Provedor de dados: 30
Autores: 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

International Arachis Newsletter
Provedor de dados: 30
Palavras-chave: Groundnuts; ELISA; Necrosis; Mutants; Mycotoxins; Genotypes; Breeds (animals); Genetic soil types; Root nodulation; Agronomy.
Ano: 2023
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3965

Identification of drought tolerant groundnut genotypes employing proteomics approach
Provedor de dados: 30
Autores: Ramesh Katam.
Palavras-chave: Drought stress; Genotypes; Weather hazards; Mycotoxins; Transcription; Tolerance; Proteins; Cytochromes; Photosystems; Gene expression.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3361

Integrated Pest Management Research at ICRISAT: Present status and future priorities
Provedor de dados: 30
Autores: H.C.
Palavras-chave: Pigeonpeas; Chickpeas; Integrated pest management; Mycotoxins; Transgenics; Sorghum; Electrophoresis; Groundnuts; Genes; Fungi.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3692

Summary proceedings of the fourth ICRISAT Regional Groundnut Meeting for Western and Central Africa
Provedor de dados: 30
Autores: F.
Palavras-chave: Mycotoxins; Groundnuts; Breeds (animals); Agronomy; Yield losses; Fungicides; Genotypes; Continuous cropping; Postharvest technology.
Ano: 1996
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4190

Genetic enhancement of groundnut
Provedor de dados: 30
Autores: G.L.
Palavras-chave: Groundnuts; Genotypes; Sowing date; Intercropping; Sole cropping; Yields; Fungicides; Seed treatment; Mycotoxins.
Ano: 1994
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4182

Summary and Recommendations of the International Workshop on Aflatoxin Contamination of Groundnut
Provedor de dados: 30
Palavras-chave: Mycotoxins; Groundnuts; ELISA; Genotypes; Sampling; Detoxification; Chromatography; Toxins; Fungi; Immunological techniques.
Ano: 1988
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4056

Agrometeorology of Groundnut
Provedor de dados: 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

Nurturing the seeds of success in the semi-arid tropics
Provedor de dados: 30
Palavras-chave: Bioinformatics; Chickpeas; Pigeonpeas; Sorghum; Mycotoxins; Millets; Hybrids; Groundnuts; Biotechnology; Transgenics.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3270

International Workshop on Groundnuts
Provedor de dados: 30
Autores: R.W.( Editor ).
Palavras-chave: Groundnuts; Root nodulation; Genotypes; Biological interaction; Mycotoxins; Chromosomes; Fungi; Breeds (animals); Polyploidy.
Ano: 1980
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3978

Conservation, evaluation and dissemination of groundnut germplasm and foundation seed production and distribution for the West African region
Provedor de dados: 30
Autores: 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

Can Bt Maize Reduce Exposure to the Mycotoxin Fumonisin in South Africa?
Provedor de dados: 31
Autores: 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

Consumers’ willingness to pay for food safety: the case of mycotoxins in milk
Provedor de dados: 31
Autores: 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

Health and Economic Impacts of Mycotoxins in Foods in Latin America and the Caribbean
Provedor de dados: 31
Autores: Jolly,   Pauline E.; Jolly,   Curtis M.
Belize City, Belize 23rd - 27th July, 2007
Tipo: Presentation
Palavras-chave: Mycotoxins; Health; Economic impact; Latin America; Caribbean; Agribusiness; Agricultural and Food Policy; I18; Q18.
Ano: 2009
URL: http://purl.umn.edu/122895

Effects of mycotoxin adsorbents in aflatoxin B 1 - and fumonisin B 1 -contaminated broiler diet on performance and blood metabolite
Provedor de dados: 96
Autores: 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

Production technology and quality of corn silage for feeding dairy cattle in Southern Brazil
Provedor de dados: 96
Autores: Silva,Mábio Silvan José da; Jobim,Clóves Cabreira; Poppi,Edson Carlos; Tres,Tamara Tais; Osmari,Milene Puntel.
ABSTRACTThe objective of this study was to evaluate the production practices and use of corn silage in dairy farms in Southern Brazil, and to evaluate their impact on the nutritional quality and occurrence of mycotoxins. The data were collected by application of questionnaires among the producers, and by analysis of silage samples. The variables were subjected to factorial analysis of data reduction through the principal components method, thus obtaining 84.12% of the variance associated with the location, corn hybrid, crop production management, and inoculant used, characterizing the farms into four distinct groups. In farms from Paraná, the silage production technologies were more associated with implantation and crop management processes, and investment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clustering; Inoculant; Maize; Mycotoxins; Silage production.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000900303

Common resistance to Fusarium head blight in Brazilian wheat cultivars
Provedor de dados: 63
Autores: 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

Thermolysed and active yeast to reduce the toxicity of aflatoxin
Provedor de dados: 63
Autores: Baptista,Antonio Sampaio; Horii,Jorge; Calori-Domingues,Maria Antonia; Glória,Eduardo Micotti da; Salgado,Jocelem Mastrodi; Vizioli,Mário Roberto.
Aflatoxins are hepatotoxic metabolites produced by Aspergillus flavus and A. parasiticus on a number of agricultural commodities. This research was carried out to evaluate the ability of thermolysed and active Saccharomyces cerevisiae to attenuate liver damage caused by aflatoxin. Diets were prepared containing 0 aflatoxin; 400 mug kg-1 aflatoxin; 400 mug kg-1 aflatoxin plus 1% of dehydrated active yeast, and 400 mug kg-1 aflatoxin plus 1% of thermolysed yeast. A bioassay with Wistar rats was conducted for 28 days, and body organs were weighted and analyses of the liver tissue of the animals were performed. The relative weight of heart, kidneys and liver from animals submitted to the different treatments did not show any difference, and liver tissue of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharomyces cerevisiae; Aflatoxicosis; Bioremediation; Mycotoxins; Natural contamination.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200008

PRESENCE OF ASPERGILLUS AND OTHER FUNGAL SYMBIONTS IN COFFEE BEANS FROM COLOMBIA
Provedor de dados: 37
Autores: GAMBOA-GAITÁN,MIGUEL ÁNGEL.
Fungi are common inhabitants of plants and plant-derived products. Some of these fungal species are potentially dangerous to human health since they are able to produce chemical substances that alter normal physiological activity. There are no studies about natural mycoflora associated with coffee beans in Colombia, and nothing is known about the presence and abundance of toxigenic fungal species in Colombian coffee. In this study 5,000 coffee beans were studied by plating them on potato-based artificial culture medium and it was shown that potentially toxigenic fungal taxa (mostly from genera Aspergillus, Fusarium, Penicillium), are currently found in Colombian coffee beans. This is true for all steps of coffee processing, from berries in trees to toasted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Commodities; Food microbiology; Coffee; Mycotoxins.
Ano: 2012
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2012000100003

Occurrence of Aspergillus sp., Fusarium sp., and aflatoxins in corn hybrids with different systems of storage
Provedor de dados: 1
Autores: Di Domenico, Adriana Sbardelotto; Busso, Cleverson; Hashimoto, Elisabete Hiromi; Frata, Marcela Tostes; Christ, Divair; Coelho, Sílvia Renata Machado.
The aim of this study was to assess alternatives for viable corn storage for small rural properties in two annual storage experiments. A 4×5 factorial design was used with four types of storage (conventional bags, hermetic bags, metal silos and corncobs) and five periods of storage (0, 3, 6, 9 and 12 months). We used corn hybrids 2B688RR and 30K73Hx cultivated in winter 2012 and summer 2012/2013 in the city of Dois Vizinhos, Paraná, Brazil. The moisture contents, counts of Aspergillus sp. and Fusarium sp., and the occurrence of aflatoxins (B1, B2, G1 and G2) were assessed. The kernels stored in hermetic bags had lower moisture contents. Aspergillus sp. and Fusarium sp. were observed in 20.37 and 86.11% of winter storage samples, respectively, and in 83.3...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.03.03.02-3; 5.07.01.03-7 Armazenamento de Produtos Agrícolas/Microbiologia de Alimentos Zea mays L.; Fungi; Mycotoxins; Grain storage; Food safety Armazenamento de Produtos Agrícolas/Microbilogia Aplicada.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/25621

Occurrence of mycootoxins in alfalfa (Medicago sativa L.), sorghum [Sorghum bicolor (L.) Moench], and grass (Cenchrus ciliaris L.) retailed in the state of Nuevo León, México
Provedor de dados: 115
Autores: Huerta-Treviño,Alejandra; Dávila-Aviña,Jorge E.; Sánchez,Eduardo; Heredia,Norma; García,Santos.
Abstract Mycotoxins are secondary metabolites produced by specific filamentous fungi that are common contaminants of agricultural commodities. These compounds are toxic to humans and animals, and they are a health problem worldwide. Mycotoxin-containing feeds can cause serious diseases in farm animals and substantial economic losses. Therefore, the objective of this study was to determine the occurrence and levels of six mycotoxins in three types of forage at retail in the state of Nuevo León, México. The hypothesis was that all types of forages were contaminated with at least one of the six mycotoxins analyzed. One hundred and twenty samples of alfalfa (Medicago sativa L.), sorghum [Sorghum bicolor (L.) Moench], and grass (Cenchrus ciliaris L.) used for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycotoxins; Forages; Aflatoxin; Fumonisin; Ochratoxin.
Ano: 2016
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952016000700825

Spray-dried porcine plasma added to diets contaminated with aflatoxins and fumonisins shows beneficial effects to piglet health
Provedor de dados: 42
Autores: MÜLLER,LUCIELI K.F.; PAIANO,DIOVANI; BOTTARI,NATHIELI B.; SANTURIO,JANIO M.; ZAMPAR,ALINE; SCHETINGER,MARIA R.C.; ZANETTE,RÉGIS A.; MENDES,RICARDO E.; GLORIA,EDUARDO M.; BALDISSERA,MATHEUS D.; SILVA,ALEKSANDRO S. DA.
Abstract This study was aimed to analyze the effects of spray-dried porcine plasma (SDPP) on the health of post weaning piglets challenged with diets contaminated with aflatoxins and fumonisins. Fifty-six male piglets (7.15 ± 0.61 kg) were allocated in four groups: CTL group received a regular diet; SDPP group received a regular diet and 6% SDPP; MYC group received a diet containing 300 µg/kg aflatoxins and 8,000 µg/kg fumonisins; group MYC+SDPP received 300 µg/kg aflatoxins, 8,000 µg/kg fumonisins and 6% SDPP. The animals that received the experimental diet containing mycotoxins (MYC group) had lower weight gain at the end of the experiment compared to the other treatments. Animals receiving SDPP showed decreased urea levels throughout the experiment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Functional foods; Intoxication; Mycotoxins; Pigs; Health.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000603115

Fungi infection in honeybee hives in regions affected by Brazilian sac brood
Provedor de dados: 45
Autores: Keller,K.M.; Deveza,M.V.; Koshiyama,A.S.; Tassinari,W.S.; Barth,O.M.; Castro,R.N.; Lorenzon,M.C.
The Brazilian Sac Brood is a disease that affects apiaries of Africanized bee hives in Brazil, thereby making them susceptible to high losses. This study investigated the pathogenicity of Africanized bee hives by the entomopathogenic fungi in a Brazilian Sac Brood endemic region. The degree of fungal contamination, presence of mycotoxins in beehive elements, and vulnerability of healthy beehives in environments subjected and not subjected to the disease were investigated. From the contaminating fungal load, species that are mycotoxin producers and pathogenic causing mortality in the bees have been isolated. The analysis of bee pollen and bee bread samples did not show the presence of the toxic pollen of Stryphnodendron (Fabaceae), which has been indicated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bee health; Beekeeping; Molds; Mycotoxins.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000501471

Biogenic amines and mycotoxins concentrations in baled silage from organic and conventional farms
Provedor de dados: 45
Autores: 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

Fusarium poae and mycotoxins: potential risk for consumers
Provedor de dados: 51
Autores: Dinolfo,María I; Stenglein,Sebastián A.
Fusarium head blight is an important disease affecting cereal grains. Fusarium graminearum is the major causal agent of this disease around the world, but some researchers have documented the increased importance of F. poae. Moreover, F. poae presence may be accompanied of its mycotoxins production, being able to produce trichothecenes of type A diacetoxyscirpenol, monoacetoxyscirpenol, scirpentriol, HT-2 toxin, T-2 toxin and neosolaniol, as well as the type B nivalenol and fusarenone-X. Outside the trichotecenes group, F. poae has been reported to produce enniatins, beauvericin and moniliformin. Due to F. poae may be present in cereal grains used for food and processed products, the aims of this review is to recognize the importance of the hazard effects...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium poae; Methods; Mycotoxins; Effects.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722014000100001

Maize (Zea Mays L) landraces from the southern region of Brazil: contamination by Fusarium sp, zearalenone, physical and mechanical characteristics of the kernels
Provedor de dados: 52
Autores: Oliveira,Tatiana Roselena de; Jaccoud-Filho,David de Souza; Henneberg,Luciana; Michel,Milton Domingos; Demiate,Ivo Mottin; Pinto,Alessandra Teixeira Barbosa; Machinski Junior,Miguel; Barana,Ana Cláudia.
This work had as objectives the study of the physical and mechanical characteristics of maize kernels in relation to the contamination by Fusarium sp and by zearalenone in twenty landraces of maize from the southern region of Brazil. From the analyzed samples, 60 % has been considered to have a hard endosperm type and 40 % an intermediary one. A correlation between the physical and mechanical variables was observed as an indication that the higher is the proportion of hard endosperm, more dense will be the kernel and more force for its rupture will be necessary. The level of contamination by Fusarium sp was between 5.5 and 24.75% among the analyzed grains, correlating positively with the flotation index, indicating that the landraces of maize with a softer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fungi; Texture of endosperm; Corn landraces; Mycotoxins.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000700002

Comparison of thin-layer chromatography, spectrofluorimetry and bright greenish-yellow fluorescence test for aflatoxin detection in corn
Provedor de dados: 52
Autores: 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

Fumonisins in corn: correlation with Fusarium sp. count, damaged kernels, protein and lipid content
Provedor de dados: 52
Autores: Ono,Elisabete Yurie Sataque; Biazon,Luciana; Silva,Marcelo da; Vizoni,Édio; Sugiura,Yoshitsugu; Ueno,Yoshio; Hirooka,Elisa Yoko.
Natural fungal and fumonisin contamination were evaluated in 109 freshly harvested corn samples from Paraná State and correlated to damaged kernels (%). In addition, healthy and damaged kernels of 24 corn samples were selected in order to compare the mycoflora profile and fumonisin levels. The correlation among protein/lipid content and fumonisin levels was also analyzed in the 15 most frequently cultivated corn hybrids. Total fungal colony count in 109 freshly harvested corn samples ranged from 1.9x10(4) to 3.5x10(6) CFU/g, Fusarium sp. count from 1.0x10³ to 2.2x10(6) CFU/g, and fumonisin levels from 0.13 to 20.38 µg/g. Total fungal colony/Fusarium sp. count and fumonisin levels showed positive correlation (p &lt; 0.05). In addition, there was a positive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycoflora; Toxigenic fungi; Mycotoxins; Fumonisins; Corn quality.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100008

Occurrence of toxigenic fungi in herbal drugs
Provedor de dados: 58
Autores: Bugno,Adriana; Almodovar,Adriana Aparecida Buzzo; Pereira,Tatiana Caldas; Pinto,Terezinha de Jesus Andreoli; Sabino,Myrna.
The increase in the consumption of natural drugs have made their use a Public Health problem due to the possibility of access to products without adequate conditions of use. The concern with the quality of the natural products is due to the potential fungal contamination and the risk of the presence of mycotoxins. Ninety-one samples of medicinal plants were evaluated for the fungal contamination and the mycotoxigenic potential of Aspergillus and Penicillium isolated from the samples. Results indicated that predominant mycoflora was distributed in 10 genera. From these, 89.9% of the isolates corresponded to genera Aspergillus and Penicillium, which are extremely important from the mycotoxicological standpoint. 21.97% of the Aspergillus and Penicillium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbal drugs; Medicinal plants; Toxigenic moulds; Mycotoxins.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000100009

Survey of moniliformin in corn cultivated in the state of São Paulo and in corn products commercialized in the city of Campinas, SP
Provedor de dados: 58
Autores: 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

The occurrence of molds, yeasts and mycotoxins in pre-cooked pizza dough sold in Southern Rio Grande do Sul
Provedor de dados: 58
Autores: Pinho,Beatriz Helena; Furlong,Eliana Badiale.
The quality of pre-cooked pizza dough was investigated by assessing the occurrence of molds, yeasts and mycotoxins. Random sampling of commercial pre-cooked pizza cakes was done in different stores in the cities of Rio Grande and Pelotas, RS, between 1996 and 1997. The products were analysed on the sampling day and after storage at room (22-30ºC) or refrigerated temperature (7ºC) following the shelf life stated by the manufacturer (25,30 and 45 days). The results showed that mold and yeast contamination was frequently above the maximum limits (10³CFU/g-1) established by Brazilian guide lines, even in samples kept at refrigerated temperatures up to the end of shelf life. Although no mycotoxin contamination was detected, a strain of the Penicillium genus,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pre-cooked pizza dough; Fungi; Mycotoxins.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000200007

Occurrence of zearalenone in wheat- and corn-based products commercialized in the State of Paraná, Brazil
Provedor de dados: 58
Autores: Almeida-Ferreira,Giovanna Caputo; Barbosa-Tessmann,Ione Parra; Sega,Rose; Machinski Junior,Miguel.
The productivity of wheat and corn crops depends on climatic conditions and resistance against phytopathogenic fungi such as those of the genus Fusarium. Some species of this genus produce zearalenone (ZEA), a mycotoxin with hyperestrogenic effects. The objective of this study was to investigate the presence of ZEA in samples of cracked wheat (n = 109), popcorn (n = 51) and corn grits (n = 50) commercialized in the State of Paraná, Brazil. Commercial samples of each crop were collected between September 2007 and June 2008 and analyzed by thin-layer chromatography. The method used for detection of the mycotoxin in wheat and corn derivatives presented a recovery rate of 94.5% and 99.5%, respectively, detection limit of 40 μg.kg-1 and quantification limit of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wheat; Corn; Zearalenone; Thin-layer chromatography; Mycotoxins.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000200005

Fumonisins in corn cultivars in the state of São Paulo
Provedor de dados: 58
Autores: 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

Aflatoxins, ochratoxin A and zearalenone in maize-based food products
Provedor de dados: 58
Autores: 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

Mycotoxicological and palynological profiles of commercial brands of dried bee pollen
Provedor de dados: 58
Autores: Deveza,Michele Valadares; Keller,Kelly Moura; Lorenzon,Maria Cristina Affonso; Nunes,Lucila Maria Teixeira; Sales,Érika Oliveira; Barth,Ortrud Monika.
Abstract Pollen is used in the human diet as a food supplement because of its high nutritional value; however, this product is prone to fungal contamination that could potentially generate toxins that are harmful to human health. This study aimed to verify the floral diversity of commercial brands of bee pollen and their mycotoxicological safety for human consumption. A total of 27 bee pollen samples were analyzed; these samples represented commercial brands, either showing an inspection seal or not, marketed in the State of Rio de Janeiro. The analyzed parameters included floral diversity through palynological analysis, water activity, fungal counts, identification and toxigenic profiles. The palynological analysis identified nine plant families, of which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bee products; Fungi; Mycotoxins; Pollen loads; Public health.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000401171

Production of mycotoxins by Fusarium graminearum isolated from small cereals (wheat, triticale and barley) affected with scab disease in Southern Brazil
Provedor de dados: 58
Autores: Geraldo,Márcia Regina Ferreira; Tessmann,Dauri José; Kemmelmeier,Carlos.
Fusarium fungi are known to be pathogenic for plants and mycotoxin producers. The in vitro production of deoxynivalenol and zearalenone was qualitatively evaluated in 24 different isolates of Fusarium graminearum collected from small cereals associated with the scab disease, in southern Brazil. Isolates were cultivated in rice during 14 days at 28ºC. Cultivates were extracted with methanol:water (40:60 v/v) and analyzed by thin layer chromatography. Other trichothecenes (diacetoxyscirpenol, fusarenon-X, neosolaniol and nivalenol) and zearalenol, often produced by Fusarium, were also analyzed. In the conditions used, it was possible to detect zearalenone and deoxynivalenol in 67% and 33% of the isolates, respectively. The presence of zearalenol,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium graminearum; Mycotoxins; Scab; Small cereals; Southern Brazil.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000100011

Production of mycotoxins by galactose oxidase producing Fusarium using different culture
Provedor de dados: 58
Autores: Pereira,Angela Maria; Kemmelmeier,Carlos.
The original isolate of the galactose oxidase producing fungus Dactylium dendroides, and other five galactose oxidase producing Fusarium isolates were cultivated in different media and conditions, in order to evaluate the production of 11 mycotoxins, which are characteristic of the genus Fusarium: moniliformin, fusaric acid, deoxynivalenol, fusarenone-X, nivalenol, 3-acetyldeoxynivalenol, neosolaniol, zearalenol, zearalenone, acetyl T-2, and iso T-2. The toxicity of the culture extracts to Artemia salina larvae was tested.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Galactose oxidase; Fusarium; Dactylium dendroides; Mycotoxins.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000200013

Mycotoxin research in Brazil: the last decade in review
Provedor de dados: 58
Autores: Rodríguez-Amaya,Delia B.; Sabino,Myrna.
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 (1961-1990). 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 AFM1 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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycotoxins; Occurrence; Influencing factors; Research; Brazil.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100001

Production of fumonisins by strains of Fusarium moniliforme according to temperature, moisture and growth period
Provedor de dados: 58
Autores: Dilkin,Paulo; Mallmann,Carlos A.; Almeida,Carlos A.A. de; Stefanon,Eliza B.; Fontana,Fernanda Z.; Milbradt,Elisane L.
Production of fumonisins B1 (FB1) and B2 (FB2) by two Brasilian strains (LAMIC 2999/96 and 113F) and one American strain (NRRL 13616) of Fusarium moniliforme were evaluated in laboratory cultures subjected to different temperatures (20, 25, and 30ºC), and moisture contents (25, 34, and 42%) on corn substrate. The cultures were grown during 10, 20, 30, 45, and 60 days, totalizing 135 treatments with two repetitions for each one. The fumonisins were extracted with acetonitrile/water. The clean-up with end-capped C18 silica (C18ec) cartridges and fumonisin derivatization with o-phtaldialdeyde were carried out through an automated sample processor system (ASPEC), followed by quantification of the toxins through HPLC. Fumonisin production varied widely,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fungi; Fusarium moniliforme; Mycotoxins; Fumonisins; Abiotic factors.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200003

Comparison of the efficiency between two sampling plans for aflatoxins analysis in maize
Provedor de dados: 58
Autores: 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

The development of an analytical method for two mycotoxins, patulin and verruculogen, and survey of their presence in commercial tomato pulp
Provedor de dados: 58
Autores: 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

Production of aflatoxins by Aspergillus flavus and of fumonisins by Fusarium species isolated from Brazilian sorghum
Provedor de dados: 58
Autores: Silva,Josefa B. da; Dilkin,Paulo; Fonseca,Homero; Corrêa,Benedito.
Fifty-nine Aspergillus flavus and 35 Fusarium verticillioides strains, isolated from freshly harvested (10) and stored (130) Brazilian sorghum samples, were tested regarding their ability to produce aflatoxins (coconut milk agar) and fumonisins (rice culture), respectively. Aflatoxins B1 and B2 were detected by TLC, and fumonisins B1 and B2 were analyzed by HPLC. Thirty-eight (64.4%) A. flavus strains produced detectable levels of aflatoxins at concentrations ranging from 12.00 to 3282.50 µg/kg (AFB1 + AFB2), while thirty two (91%) F. verticillioides strains produced FB1 at concentrations ranging from 0.12 to 5.38 µg/g. Two F. proliferatum strains produced low fumonisin levels. The toxigenic potential of A. flavus (64.4%) and F. verticillioides (91.5%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxigenicity; Aspergillus flavus; Fusarium verticillioides; Mycotoxins; Sorghum; Aflatoxin; Fumonisin.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000200002

Fusarium and Aspergillus mycotoxins contaminating wheat silage for dairy cattle feeding in Uruguay
Provedor de dados: 58
Autores: del Palacio,Agustina; Bettucci,Lina; Pan,Dinorah.
Abstract Wheat is one of the most important cultivated cereals in Uruguay for human consumption; however, when harvest yields are low, wheat is usually used in ensiling for animal feeding. Ensiling is a forage preservation method that allows for storage during extended periods of time while maintaining nutritional values comparable to fresh pastures. Silage is vulnerable to contamination by spoilage molds and mycotoxins because ensilage materials are excellent substrates for fungal growth. The aim of the study was to identify the mycobiota composition and occurrence of aflatoxins and DON from wheat silage. A total of 220 samples of wheat were collected from four farms in the southwest region of Uruguay were silage practices are developed. The main fungi...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wheat silage; Mycotoxins; Fungi.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000401000

A method for the determination of two Alternaria toxins, alternariol and alternariol monomethyl ether, in tomato products
Provedor de dados: 58
Autores: 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

Intralaboratory optimization and validation of a method for patulin determination in grapes by Thin-Layer Chromatography
Provedor de dados: 58
Autores: Oliveira,Renata Cabrera de; Bando,Érika; Machinski Junior,Miguel.
The aim of this work was to optimize and validate, by intralaboratorial procedures, a method for the determination of patulin in grapes by thin-layer chromatography. The steps of extraction, cleanup, detection and quantification were optimized. For the validation of the method, recovery assays with standard solutions and artificially contaminated samples were carried out. The mean recovery and the variation coefficient were 65.4% and 7.58%, respectively. The optimized conditions were: 50 mL of grape juice, three extraction stages (with 100 mL of ethyl acetate in the first stage and 50 mL in second and third stages), and 100 µL of ethanol to solubilize the extract. The solvent-system used was toluene - ethyl acetate - formic acid (6:3:1), and 0.5% MBTH in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Patulin; Mycotoxins; Grape; Thin-layer chromatography.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200023

Methods to preserve potentially toxigenic fungi
Provedor de dados: 58
Autores: Guimarães,Lucas Costa; Fernandes,Ana Paula; Chalfoun,Sara Maria; Batista,Luís Roberto.
Microorganisms are a source of many high-value compounds which are useful to every living being, such as humans, plants and animals. Since the process of isolating and improving a microorganism can be lengthy and expensive, preserving the obtained characteristic is of paramount importance, so the process does not need to be repeated. Fungi are eukaryotic, achlorophyllous, heterotrophic organisms, usually filamentous, absorb their food, can be either macro or microscopic, propagate themselves by means of spores and store glycogen as a source of storage. Fungi, while infesting food, may produce toxic substances such as mycotoxins. The great genetic diversity of the Kingdom Fungi renders the preservation of fungal cultures for many years relevant. Several...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycotoxins; Toxigenic fungi; Methods for fungal conservation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100007

Bromatological and mycotoxin analysis on soybean meal before and after the industrial process of micronization
Provedor de dados: 65
Autores: 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

Occurrence of ochratoxin A in grapes, juices and wines and risk assessment related to this mycotoxin exposure
Provedor de dados: 65
Autores: Dachery,Bruna; Manfroi,Vitor; Berleze,Kally Janaina; Welke,Juliane Elisa.
Ochratoxin A (OTA) is a mycotoxin with nephrotoxic, genotoxic, teratogenic and carcinogenic properties. The presence of this toxin in wines and juices occurs due to the development of toxigenic fungi in grapes. Studies have shown the presence of this toxic secondary metabolite in these beverages may results in economic losses to the winery as well as health problems for consumers. In Europe, several studies have been done in order to map the areas where the development of ochratoxigenic fungi is more favorable. However, in Brazil these studies are still incipient. The Joint Expert Committee on Food Additives of the World Health Organization (JECFA) established the safe tolerable intake of 112ng OTA per kg of body weight per week. To verify whether the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycotoxins; Risk assessment; Toxic compounds.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100176

Stoking residue from extraction of cassava starch without the use of storage technologies
Provedor de dados: 65
Autores: Javorski,Cleovani Rossi; Zambom,Maximiliane Alavarse; Pozza,Magali Soares dos Santos; Fernandes,Tatiane; Castagnara,Deise Dalazen; Paladini,Simoni; Tinini,Rodrigo Cesar dos Reis; Neres,Marcela Abbado.
The purpose of this paper was to study the storage of the residue from the extraction of cassava starch without the use of storage technologies, through chemical evaluation, pH values, temperature, development of microorganisms and mycotoxins. A randomized block design was used with eight treatments (different storage periods: 0, 3, 6, 9, 12, 15, 18 and 21 days) and five replications. There was a significant difference for DM content, as a function of days in storage. The chemical composition of the residue from the extraction of cassava starch did not changed throughout the storage period. A negative linear effect was obtained for the pH values, which decreased with days in storage. There was significance of the storage period only for the fungus and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Manihot esculenta; Wet material; Mycotoxins; Microorganisms.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000300405

Aflatoxins and fumonisins in feed from a broiler operation system from São Paulo state, Brazil
Provedor de dados: 65
Autores: 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

Exposure to ochratoxin A through consumption of grape juices produced by steam distillation method and intended for school meals
Provedor de dados: 65
Autores: Dachery,Bruna; Manfroi,Vitor; Welke,Juliane Elisa.
ABSTRACT: The grape juice was included in meals of public schools in the states of Rio Grande do Sul and Santa Catarina, Brazil. The juices intended for schools have been produced by small wineries through the steam distillation method. This method presents a particularity in relation to other juice production methods, since the grapes are not macerated to extract the juice. In literature is well established that maceration of grapes is the main critical point associated with the ochratoxin A (OTA) contamination in juices. OTA is a mycotoxin with nephrotoxic and immunosuppressives effects. The aim of this study was to verify the OTA occurrence in juices produced by steam distillation method, as grape juice may be a source of OTA exposure for children. No...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Mycotoxins; Toxic compounds; Ochratoxin A.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001868

Toxigenic mycobiota and mycotoxins in shrimp feed
Provedor de dados: 65
Autores: Calvet,Rodrigo Maciel; Pereira,Maria Marlúcia Gomes; Costa,Amilton Paulo Raposo; Torres,Adriana Mabel; Muratori,Maria Christina Sanches.
The objective of this study was to identify the toxigenic mycobiota and the occurrence of aflatoxins in shrimp feed products intended for shrimp cultivated in the coastal area of the state of Piauí, Brazil, in three farms ("A", "B" and "C"). The toxigenic capacity of the fungal species isolated was tested for aflatoxins (AF) and ochratoxin A production. The fungal counts of shrimp feed were similar for the "A" and "B" farms at all cultivation phases, collection sites, in closed and opened packages (1.33 to 2.66CFU g-1 log10 -1). The lowest fungal counts were found in feed from "C" farm (0.65CFU g-1 log10 -1) from closed packages. Thirty-four strains of Aspergillus were detected with a greater prevalence of A. flavus. Two strains produced B1, B2, G1 and G2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Litopenaeus vannamei; Feed storage; Toxigenic fungi; Mycotoxins; Aflatoxin B1.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000601021