Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados BJM (3) Autor Takahashi,Jacqueline A. (3) Boaventura,Maria Amélia D. (1) Bracarense,Adriana A.P. (1) Castro,Mateus C. Monteiro de (1) Lopes,Rosiane F.A.P. (1) Lucas,Esther M.F. (1) Mais... Palavra-chave 3-indolylacetonitrile (1) Antibiotics (1) Antimicrobial activity (1) Aspergillus niger (1) Aspergillus parasiticus (1) Beauveria bassiana (1) Biotransformations (1) Factorial planning (1) Isocromophilone VI (1) Kojic acid (1) Metabolites diversification (1) Pencolide (1) Penicillium sclerotiorum (1) Sclerotiorin (1) Tryptamine (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2014 (1) 2007 (1) 2004 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Microorganisms as tools in modern chemistry: the biotransformation of 3-indolylacetonitrile and tryptamine by fungi BJM Boaventura,Maria Amélia D.; Lopes,Rosiane F.A.P.; Takahashi,Jacqueline A.. Chemical reactions performed by microorganisms have been used as a modern tool in chemistry. In this work, the ability of the fungi Beauveria bassiana and Aspergillus niger to modify the chemical structure of indole compounds was studied. Beauveria bassiana was able to transform 3-indolylacetonitrile into 3-methylindole while Aspergillus niger transformed tryptamine into 5-hydroxyindole-3-acetamide. Interestingly, these fungi were able to perform both reduction and oxidation of the indole compounds fed, the oxidation occurring with improved levels of oxygen uptake. The results prove once more the versatility of microorganisms to perform a wide range of industrially attractive chemical reactions. Tipo: Info:eu-repo/semantics/article Palavras-chave: Biotransformations; Beauveria bassiana; Aspergillus niger; 3-indolylacetonitrile; Tryptamine. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300014 Antimicrobial properties of sclerotiorin, isocHromophilone VI and pencolide, metabolites from a Brazilian cerrado isolate of Penicillium sclerotiorum van Beyma BJM Lucas,Esther M.F.; Castro,Mateus C. Monteiro de; Takahashi,Jacqueline A.. As a part of a research program that aims to identify antibacterial and antifungal substances from fungus specimen of Brazilian's cerrado soil samples, Penicillium sclerotiorum was identified as a source of secondary metabolites possessing antibiotic activities. This microorganism was cultured in a liquid medium rich in glucose for fifteen days. The resulting ethyl acetate extract was chemically fractionated leading to the isolation of three metabolites pencolide, sclerotiorin and isochromophilone VI. The antimicrobial disc assay activity of these substances towards Candida albicans, Streptomyces pyogenes, Staphylococcus aureus, Salmonella typhimurium and Escherichia coli was performed. Minimum inhibitory concentration (MIC) of the compounds was... Tipo: Info:eu-repo/semantics/article Palavras-chave: Sclerotiorin; Isocromophilone VI; Pencolide; Antibiotics; Penicillium sclerotiorum. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000400036 Modulation of antimicrobial metabolites production by the fungus Aspergillus parasiticus BJM Bracarense,Adriana A.P.; Takahashi,Jacqueline A.. Biosynthesis of active secondary metabolites by fungi occurs as a specific response to the different growing environments. Changes in this environment alter the chemical and biological profiles leading to metabolites diversification and consequently to novel pharmacological applications. In this work, it was studied the influence of three parameters (fermentation length, medium composition and aeration) in the biosyntheses of antimicrobial metabolites by the fungus Aspergillus parasiticus in 10 distinct fermentation periods. Metabolism modulation in two culturing media, CYA and YES was evaluated by a 2² full factorial planning (ANOVA) and on a 2³ factorial planning, role of aeration, medium composition and carbohydrate concentration were also evaluated. In... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aspergillus parasiticus; Factorial planning; Metabolites diversification; Kojic acid; Antimicrobial activity. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100045 Registros recuperados: 3 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco