Consulta: subjectFacets:"Ergosterol"
Registros recuperados: 9
Data/hora: 17/06/2024 03:31:27

Distribution of Fusarium mycotoxins in wheat milling process.
Provedor de dados: Acesso Livre à Informação Científica da Embrapa (Repositório Alice)
Autores: TIBOLA, C. S.; FERNANDES, J. M. C.; GUARIENTI, E. M.; NICOLAU, M.
5th International Symposium on Fusarium Head Blight.
Tipo: Parte de livro
Palavras-chave: Mycotoxin; Milling process.; Micotoxina; Trigo.; Ergosterol; Deoxynivalenol; Wheat.
Ano: 2016
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1048814

An appraisal of five methods for the measurement of the fungal population in soil treated with chlorothalonil.
Provedor de dados: Acesso Livre à Informação Científica da Embrapa (Repositório Alice)
Autores: VIEIRA, R. F.; SILVA, C. M. M.; MAIA, A. de H. N.; FAY, E. F.; COELHO, K. C.
An experiment was carried out in a greenhouse with the aim of determining an acceptable method to quantify the fungal population in a soil treated with the fungicide chlorothalonil. Doses of the fungicide ranging from 12 to 96mg AIgÿ1 soil were applied and microbial biomass carbon (C), soil ergosterol content, living hyphal length, as well as counts of total and cellulolytic fungi colonies, were measured 1, 2, 3, 4 and 5 weeks after application. At the end of 16 weeks a new evaluation was done using the three ®rst methods. The microbial biomass C was the least sensitive parameter and, on balance, the living hyphal length was the most sensitive parameter for demonstrating effects of chlorothalonil on the fungal population. Some problems related to the...
Tipo: Artigo de periódico
Palavras-chave: Fungicide; Living hyphal length; Chlorothalonil; Ergosterol; Microbial biomass; Fungi; Population.
Ano: 2000
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1153084

The relationship between fungi growth and aflatoxin production with ergosterol content of corn grains
Provedor de dados: Brazilian Journal of Microbiology
Autores: Castro,Maria Fernanda Penteado Moretzsohn de; Bragagnolo,Neura; Valentini,Sílvia Regina de Toledo.
The relationships between fungal growth and ergosterol content and between aflatoxins B1 and B2 production and ergosterol content were verified in corn grains. In the first experiment, fungal growth and ergosterol content were monitored during incubation of corn grains presenting water activities of 0.85a w and 0.92a w at 25ºC over a period of 18 days. For the Taiúba variety, the fungi growth and ergosterol content increased more rapidly for 0.92a w than 0.85a w. Maximum ergosterol levels were 2.8 and 4.6 µg/g, respectively, for 0.85a w and 0.92a w. For the Cargill hybrid 606, a more pronounced increase in fungal growth was verified just at the end of the incubation period, mainly for 0.92a w when an acentuated increase in ergosterol content was also...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corn grains; Ergosterol; Fungal growth; Aflatoxins.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100004

Characterization of fungal inoculum used in soil bioremediation
Provedor de dados: Brazilian Journal of Microbiology
Autores: Ballaminut,Nara; Matheus,Dácio R.
Studies have indicated the capacity of basidiomycetes to degrade recalcitrant organopollutants. However, the age of the fungal inoculum to obtain a more effective degradation has not been defined. The criterion used is total colonization of the substrate. Psilocybe castanella CCB444 and Lentinus crinitus CCB274 have been evaluated in soils containing hexachlorobenzene. In the present study, the physiological conditions of the fungal inocula were characterized on solid substrate (sugarcane bagasse, starch and soy flour). Colonization of the substrate, loss of organic matter, pH variation, organic carbon, total nitrogen, fungal biomass and enzymatic activity were evaluated over 30 days of incubation. Colonization of the substrate was almost complete after 20...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ligninolytic enzymes; Basidiomycetes; Fungal inoculum; Ergosterol.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200011

Uso do fungo Fusarium oxysporum como indicador de ametrina, através da medida de biomassa, pela quantificação do ergosterol
Provedor de dados: Ciência e Agrotecnologia
Autores: Galvão,José Geraldo; Guerreiro,Mário César; Souza,Josefina Aparecida de; Coura,Samuel Martins da Costa.
Neste trabalho avaliou-se o fungo Fusarium oxysporum como potencial bioindicador de contaminação de herbicida da classe das triazinas, por meio do monitoramento do crescimento fúngico. Para tanto, foi avaliado o crescimento micelial em meio de cultura extrato malte e ágar na presença do herbicida ametrina, em diversas concentrações. O crescimento micelial foi avaliado pela determinação do teor de ergosterol, por CLAE/DAD, em comprimento de onda de 281 nm. A quantificação do ergosterol passa pelas etapas de extração em etanol, saponificação em base forte, fracionamento em hexano:água (4:1) e análise por CLAE. O crescimento do fungo foi retardado pelo aumento da concentração do herbicida, mostrando que o potencial dessa técnica de avaliação de contaminação...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ergosterol; Ametrina; Bioindicador; Fusarium; CLAE.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542003000400015

Assessment of the antifungal activity of Spirulina platensis phenolic extract against Aspergillus flavus
Provedor de dados: Ciência e Agrotecnologia
Autores: Souza,Michele Moraes de; Prietto,Luciana; Ribeiro,Anelise Christ; Souza,Taiana Denardi de; Badiale-Furlong,Eliana.
The production of safe food has stimulated the search for natural substances that possess antifungal activity. The indirect methods of estimating fungal biomass are based on the measurement of glucosamine, ergosterol and protein - typical compounds produced during the development of biomass. The aim of the study was to assess the effect of the phenolic extract from Spirulina platensis on the production of structural compounds in Aspergillus flavus, in order to identify its action on fungal inhibition. The Spirulina platensis methanolic extracts presented 1.15 mg phenolic compound/g Spirulina platensis, which showed an antifungal effect against Aspergillus flavus, inhibiting the glucosamine production up to 56%. Therefore, it may be employed as natural...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic inhibitors; Antifungal property; Glucosamine; Protein; Ergosterol.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600003

Dry fruit as source of fungal contaminants or functional compounds?
Provedor de dados: Ciência e Tecnologia de Alimentos
Autores: HARTWIG,Naralice; FERREIRA,Cláudia Fetter Jorge; COLAZZO,Carolina Carvalho; KUPSKI,Larine; BADIALE-FURLONG,Eliana.
Abstract This study evaluated the role of dry fruits as a source of fungal contaminants or functional compounds. Dry apple, apricot, candied fruits, prune, and white and black raisin were evaluated regarding patulin and ergosterol content, centesimal composition, pH, acidity, pectin, and phenolic profile. The ergosterol was detected in 38% of the samples and patulin (PAT) in 89%, the apricot samples stood out most by contaminant level. Apricot, candied fruit, and prunes presented moisture values beyond the other dry fruits. The pH ranged from 3.8 to 4.6; acidity from 0.1 to 1.0%; sugar content from 1.7 to 5.5%; and levels of soluble and insoluble pectin from 1.6 to 5.1% and 10.9% to 27.3%, respectively. The apples showed a higher content of free phenolic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ergosterol; Patulin; Pearson correlation; Phenolic acids; Pectin.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612020000100076

Analysis of the ergosterol biosynthesis pathway cloning, molecular characterization and phylogeny of lanosterol 14α-demethylase (ERG11) gene of Moniliophthora perniciosa
Provedor de dados: Genetics and Molecular Biology
Autores: Ceita,Geruza de Oliveira; Vilas-Boas,Laurival Antônio; Castilho,Marcelo Santos; Carazzolle,Marcelo Falsarella; Pirovani,Carlos Priminho; Selbach-Schnadelbach,Alessandra; Gramacho,Karina Peres; Ramos,Pablo Ivan Pereira; Barbosa,Luciana Veiga; Pereira,Gonçalo Amarante Guimarães; Góes-Neto,Aristóteles.
The phytopathogenic fungus Moniliophthora perniciosa (Stahel) Aime &amp;amp; Philips-Mora, causal agent of witches' broom disease of cocoa, causes countless damage to cocoa production in Brazil. Molecular studies have attempted to identify genes that play important roles in fungal survival and virulence. In this study, sequences deposited in the M. perniciosa Genome Sequencing Project database were analyzed to identify potential biological targets. For the first time, the ergosterol biosynthetic pathway in M. perniciosa was studied and the lanosterol 14α-demethylase gene (ERG11) that encodes the main enzyme of this pathway and is a target for fungicides was cloned, characterized molecularly and its phylogeny analyzed. ERG11 genomic DNA and cDNA were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Basidiomycota; Fungus; Ergosterol; Theobroma cacao.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000500011

Ergosterol isolated from the basidiomycete Pleurotus salmoneostramineus affects Trypanosoma cruzi plasma membrane and mitochondria
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Alexandre,Tatiana Rodrigues; Lima,Marta Lopes; Galuppo,Mariana Kolos; Mesquita,Juliana Tonini; Nascimento,Matilia Ana do; Santos,Augusto Leonardo dos; Sartorelli,Patricia; Pimenta,Daniel Carvalho; Tempone,Andre Gustavo.
Abstract  Background  Major drawbacks of the available treatment against Chagas disease (American trypanosomiasis) include its toxicity and therapeutic inefficiency in the chronic phase of the infection, which makes it a concern among neglected diseases. Therefore, the discovery of alternative drugs for treating chronic Chagas disease requires immediate action. In this work, we evaluated the mushroom Pleurotus salmoneostramineus in the search for potential antiparasitic compounds.  Methods  Fruit bodies of the basidiomycete Pleurotus salmoneostramineus were triturated and submitted to organic solvent extraction. After liquid-liquid partition of the crude extract, three fractions were obtained and the bioguided fractionation study was conducted to isolate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pleurotus salmoneostramineus; Ergosterol; Trypanosoma cruzi; Mechanism of action.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100313