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| Registros recuperados: 38 | |
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| Pimentel,Flávio Araújo; Cardoso,Maria das Graças; Batista,Luis Roberto; Guimarães,Luiz Gustavo de Lima; Silva,Daiani Maria. |
| Neste trabalho, avaliou-se a capacidade fungitóxica do óleo essencial de folhas frescas de Tanaecium nocturnum sobre o Aspergillus flavus isolado da castanha-do-brasil, por meio das técnicas de contato e fumigação. Pelos resultados dos bioensaios realizados até 10 dias de incubação, verificou-se que a inibição total do crescimento micelial ocorreu quando se utilizou o óleo essencial nas concentrações de 782 ppm (técnica de contato) e 1000 ppm (técnica de fumigação). Em ambas as técnicas, o óleo essencial inibiu a esporulação a partir da concentração de 500 ppm. Observou-se que nos cinco primeiros dias de incubação não houve diferença significativa nos resultados apresentados pelas duas técnicas estudadas, havendo a partir daí uma redução da atividade do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Óleo essencial; Ação fungitóxica; Tanaecium nocturnum; Aspergillus flavus; Bertholletia excelsa. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672010000100027 |
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| Cruz-Rodríguez,Rosa Isela; Meza-Gordillo,Rocío; Rodríguez-Mendiola,Martha Alicia; Arias-Castro,Carlos; Mancilla-Margalli,Norma Alejandra; Ávila-Miranda,Martín Eduardo; Culebro-Ricaldi,José Miguel; Gutiérrez-Miceli,Federico Antonio; Ruiz-Valdiviezo,Víctor Manuel; Ayora-Talavera,Teresa Del Rosario. |
| ABSTRACT In the present study, the hexane, acetone and methanol extracts of stem, branches and roots from Crotalaria longirostrata were evaluated for their antifungal activity against Fusarium sp., Fusarium verticillioides and Aspergillus flavus. The variables analyzed were inhibition halos, mycelial growth inhibition, sporulation and minimum inhibitory concentration. Phytochemical analysis revealed the presence of saponins, coumarins, anthrones, anthraquinones, flavonoids and alkaloids on different organic extracts. The hexane extract showed zones of inhibition between 6.3 and 10.5 mm. The mycelia growth and sporulation of A. flavus were reduced to 90% with methanol extract. The minimum inhibitory concentration values obtained with hexane extracts were... |
| Tipo: Journal article |
Palavras-chave: Fungicidal properties; Extracts; Fusarium verticillioides; Fusarium sp.; Aspergillus flavus. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432017000100167 |
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| Gonçalez,Edlayne; Souza,Tiago Noel de; Rossi,Maria Helena; Felicio,Joana D'arc; Corrêa,Benedito. |
| As cascas de amendoim (Arachis hypogaea L.) são de grande importância para confecção de cama de frangos, de gado de leite e como fonte de fibras para ruminantes, portanto a elucidação dos mecanismos de contaminação por fungos toxigênicos e por micotoxinas em amendoim é imprescindível, especialmente para que medidas preventivas possam ser tomadas. Realizou-se, este trabalho, em Junqueirópolis, Estado de São Paulo, Brasil. Os principais fungos isolados nas cascas de amendoim foram Fusarium ssp. (78,75 %), Rhizopus ssp. (14,1 %) e A. flavus (11,75 %). No solo foram isolados Penicillium spp., Fusarium spp. e Aspergillus flavus, entre outros. Aflatoxinas foram detectadas em amostras de cascas de amendoim a partir do estágio de granação em concentrações que... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aflatoxinas; Ácido ciclopiazônico; Fumonisinas; Aspergillus flavus; Amendoim; Arachis hypogaea L. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542008000500004 |
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| 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 |
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| Gonçalez,E.; Felicio,J.D.; Pinto,M.M.. |
| The biflavonoids 6,6"-bigenkwanin, amenthoflavone, 7,7"-dimethoxyagastisflavone and tetradimethoxybigenkwanin isolated from Ouratea species were tested for inhibitory activity on Aspergillus flavus cultures. Suspensions of Aspergillus flavus spores were inoculated into 50 ml of YES medium at different biflavonoid concentrations: 5 and 10 µg/ml for 6,6"-bigenkwanin, amenthoflavone and 7,7"-dimethoxyagastisflavone, and 5, 10, 15 and 20 µg/ml for tetradimethoxybigenkwanin. The four biflavonoids showed inhibitory activity on aflatoxin B1 and B2 production (P<0.001), but did not inhibit fungal growth at the concentration tested (P>0.05). These results show that biflavonoids can be used for the development of agents to control aflatoxin production. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Ouratea sp; Aspergillus flavus; Biflavonoids; Aflatoxins. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001001100013 |
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| Figueira,Edson Luiz Zangrando; Hirooka,Elisa Yoko. |
| Mycelial growth and amylase production by a mycotoxigenic strain of Fusarium moniliforme and Aspergillus flavus were evaluated in a culture medium containing starch, glycerol, wheat bran or corn. With emphasis on corn, different fractions composed by germ, degermed seed, starch, milky stage corn and the respective starch or supernatant fraction were analyzed for F. moniliforme growth . The medium composed of milky stage corn supernatant promoted the best mycelial growth (p<0.05), and it was used to prepare amylase production medium in the next step. The medium composed with 2% ground corn in milky stage corn supernatant (350g of milky stage corn blended with 250mL water and centrifuged) promoted the highest amylase production, which was at the 10th day... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amylase; Fusarium moniliforme; Aspergillus flavus. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000500003 |
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| Peres,Julio Cesar Fernandes; Carvalho,Luciana Retz de; Gonçalez,Edlayne; Berian,Luis Otávio Saggion; Felicio,Joana D´arc. |
| Seaweeds are subject to numerous biological interactions and sometimes to extreme abiotic conditions, so they have developed among other defense mechanisms, the ability to produce biologically active substances. Thus, these organisms produce mainly terpenes and phenols. Among others, the antifungal activity, due to its importance in human and animal health and the production of agricultural products, has been the subject of several studies. In the present work, this activity was investigated in ten seaweeds extracts, by direct bioautography assays, compared to Colletotrichum lagenarium and disk diffusion assay, compared to Aspergillus flavus. The organisms studied were: Stypopodium zonale, Laurencia dendroidea, Ascophyllum nodosum, Sargassum muticum,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Etanolic extract; Colletotrichum lagenarium; Aspergillus flavus. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000300004 |
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| Villamizar-Gallardo,Raquel; Cruz,Johann Faccelo Osma; Ortíz-Rodriguez,Oscar Orlando. |
| Abstract: The objective of this work was to evaluate the microbicidal effect of silver nanoparticles (AgNPs) on potentially toxigenic fungi affecting cocoa (Theobroma cacao) crops. These fungi, isolated from diseased cocoa pods, were characterized phenotypically and genotypically. The microbicidal effect was assessed by measuring radial mycelial growth, in synthetic culture media, and at different AgNP concentrations in plant tissues. The inhibition effect was monitored in Petri dishes, and changes in fungal structures were observed through scanning electron microscopy. Two potentially toxigenic fungi were highly prevalent: Aspergillus flavus and Fusarium solani. The inhibition assays, performed in liquid and solid synthetic culture media, showed that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus flavus; Fusarium solani; Theobroma cacao; Alternative control; Agri-food nanotechnology; Ochratoxin A. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016001201929 |
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| Denardi,Laura Bedin; Hoch Dalla-Lana,Bianca; Pantella Kunz de Jesus,Francielli; Bittencourt Severo,Cecília; Santurio,Janio Morais; Zanette,Régis Adriel; Alves,Sydney Hartz. |
| ABSTRACT The in vitro susceptibility of 105 clinical and environmental strains of Aspergillus fumigatus and Aspergillus flavus to antifungal drugs, such as amphotericin B, azoles, and echinocandins was evaluated by the broth microdilution method proposed by the European Committee on Antimicrobial Susceptibility Testing (EUCAST). Following the EUCAST-proposed breakpoints, 20% and 25% of the clinical and environmental isolates of A. fumigatus, respectively, were found to be resistant to itraconazole (Minimal Inhibitory Concentration, MIC > 2.0 mg/L). Voriconazole showed good activity against A. fumigatus and A. flavus strains, except for one clinical strain of A. fumigatus whose MIC was 4.0 mg/L. Posaconazole (≤0.25 mg/L) also showed appreciable activity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus flavus; Aspergillus fumigatus; Echinocandins; Azoles; Environmental; Susceptibility. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000100030 |
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| Pak,Adriana; Gonçalez,Edlayne; Felicio,Joana D'arc; Pinto,Marina Mori; Rossi,Maria Helena; Simoni,Isabela Cristina; Lopes,Márcia Nasser. |
| Polymnia sonchifolia, commonly known as ";yacon";, was originally cultivated at Andes moutains in South America. Recently, the specie attracted worldwide attention because of its wide range of uses, for example in the control of diabetes melitus, besides the antifungal and pesticidal compounds were found in the leaves. This study describes the identification of two flavonoids: 3', 5, 7 trihydroxy-3, 4'-dimethoxyflavone (compound 1) and 3', 4', 5- trihydroxy-7-methoxy flavanone (compound 2) and two sesquiterpenes lactones: enhydrin (compound 3) and a mixture of enhydrin and uvedalin (compound 4) isolated from Polymnia sonchifolia leaves and their effects on the aflatoxin production by Aspergillus flavus. The identification of the compounds were achieved by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polymnia sonchifolia; Flavonoids; Melampolides; Aflatoxin; Aspergillus flavus. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000200018 |
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| Santos,Ygor Flávio de Moraes; Veloso,Átyla Peeter Batista; Calvet,Rodrigo Maciel; Gomes Pereira,Maria Marlúcia; Pereyra,Carina Maricel; Dalcero,Ana Maria; Torres,Adriana Mabel; Muratori,Maria Christina Sanches. |
| The sodium metabisulphite (SMB) is used in shrimp farming to prevent melanosis and the 5.0 ppm chlorine (CL) concentration used in the shrimp processing is efficient as a bactericide, but there is no evidence of the effectiveness of these chemical compounds as fungicides. Therefore, the aim of this study was to evaluate the in vitro effect of sodium metabisulphite (SMB) and chlorine (CL) on the growth of Aspergillus and Penicillium species isolated from marine shrimp in different stages of processing. The samples were collected from a frozen shrimp processing industry, located in Piauí State, Brazil. The total fungi and occurrence of Aspergillus and Penicillium species were evaluated. For in vitro sensibility test using the diffusion disk in agar method,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus flavus; Litopenaeus vannamei; Penicillium citrinum; Shrimp culture; Conservation. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000900029 |
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| MARTINS,Hermínia Marina; MARTINS,Maria Lígia; BERNARDO,Fernando Almeida. |
| Aflatoxins production is affected by abiotic, biotic and genetic parameters. Eugenesic and dysgenetic condition for aflatoxinogenesis are relatively well studied, such as: the influence of temperature, pH, Aw, Oxigen tension, osmotic pression, organic and inorganic nutrients, substance with fungistatic effects: however there are relatively few knowledge about endogenous regulator mechanisms, the kinetic of the anabolism and the interaction between the productive moulds and remaining microflora holding in eutrophying substrates. The main objective of this study is to evaluate biotic interaction between five indigenous strains of A. flavus, confirmed non-toxigenic, and a productive strain (A. parasiticus ATCC 15 517), cultured simultaneously on two... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant interaction; Aflatoxins; Vegetal production; Aspergillus flavus; Aspergillus parasiticus. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962000000600003 |
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| Registros recuperados: 38 | |
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