Pyrene Metabolites
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. Study of polycyclic aromatic hydrocarbon (PAH) degradation and antimicrobial production by marine invertebrate derived fungi. / Estudo da degradação de hidrocarbonetos policíclicos aromáticas (HPAs) e da produção de antimicrobianos por fungos filamentosos isolados de invertebrados marinhos.
Seventy three fungi representatives of distinct taxonomic groups, isolated from cnidarians collected from north coast of São Paulo State, were submitted to RBBR dye decolorization tests and to MIC. Thirteen fungal selected from the decolorization test were submitted to pyrene and benzo[a]pyrene degradation assays. Seven fungi showed satisfactory PAH degrada
Publicado em: 2008
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2. Hidrocarbonetos policíclicos aromáticos no meio ambiente: diferenciação de fontes em sedimentos e metabólitos em bile de peixes
Many studies on environmental ecosystems quality related to polycyclic aromatic hydrocarbons (PAH) have been carried out routinely due to their ubiquotus presence worldwide and to their potential toxicity after its biotransformation. PAH may be introduced into the environmet by natural and anthropogenic processes from direct runoff and discharges and indirec
Publicado em: 2007
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3. EVALUATION OF THE OIL CONTAMINATION OF THE ESTUARINE ENVIRONMENT OF THE GUANABARA BAY (RJ) BY THE FLUOROMETRIC DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) IN THE MUGIL LIZA FISH BILE / AVALIAÇÃO DA CONTAMINAÇÃO DE ÓLEO NO AMBIENTE ESTUARINO DA BAÍA DE GUANABARA (RJ) PELA DETERMINAÇÃO FLUORIMÉTRICA DE HIDROCARBONETOS POLICÍCLICOS AROMÁTICOS (HPAS) NA BÍLIS DE PEIXES MUGIL LIZA
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment. The main source of contamination is antropogenic, and oil spills are one of the main PAHs sources for the aquatic environment. This work evaluates the usage of PAH metabolites in fish bile (Mugil liza) as biomarkers in the aquatic environment. For this evaluation two distinct areas we
Publicado em: 2006
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4. EVALUATION OF THE CONTAMINATION FROM GUANABARA BAY MANGROVES USING CRABS UCIDES CORDATUS AS INDICATORS OF OIL POLLUTANTS AND DEVELOPMENT OF ANALYSIS / AVALIAÇÃO DA CONTAMINAÇÃO DE MANGUEZAIS DA BAÍA DE GUANABARA UTILIZANDO CARANGUEJOS UCIDES CORDATUS COMO BIOINDICADOR DE POLUENTES DE PETRÓLEO E DESENVOLVIMENTO DE METODOLOGIAS DE ANÁLISES
The aim of this study was the validation of crab Ucides cordatus as indicator of oil pollution in mangrove areas from Guanabara Bay. For such purpose it was performed: (1) chemical analyses of PAHs in hepatopancreas and sediment samples by gas chromatography with mass spectrometer detector (GC/MS); (2) bioassays with pyrene exposure experiments and evaluatio
Publicado em: 2005
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5. ESTUDOS QUALITATIVOS PARA DETERMINAÇÃO DE METABÓLITOS DE PIRENO EMPREGANDO CG/EM / QUALITATIVE STUDIES FOR DETERMINATION OF PYRENE METABOLITES USING GC/MS
Os Hidrocarbonetos Policíclicos Aromáticos (HPAs) são contaminantes carcinogênicos e mutagênicos, freqüentemente encontrados no ambiente. Muitos organismos são capazes de metabolizá-los rapidamente, tornando de fundamental importância o desenvolvimento de técnicas analíticas para a determinação de seus metabólitos. A determinação do 1- hidrox
Publicado em: 2003
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6. Novel metabolites in phenanthrene and pyrene transformation by Aspergillus niger.
Aspergillus niger, isolated from hydrocarbon-contaminated soil, was examined for its potential to degrade phenanthrene and pyrene. Two novel metabolites, 1-methoxyphenanthrene and 1-methoxypyrene, were identified by conventional chemical techniques. Minor metabolites identified were 1- and 2-phenanthrol and 1-pyrenol. No 14CO2 evolution was observed in eithe
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7. Pyrene Metabolism in Crinipellis stipitaria: Identification of trans-4,5-Dihydro-4,5-Dihydroxypyrene and 1-Pyrenylsulfate in Strain JK364 †
The isolation and identification of two novel metabolites in the fungal metabolism of pyrene are described. The plant-inhabiting basidiomycete Crinipellis stipitaria JK364 metabolized pyrene, a polycyclic aromatic hydrocarbon containing four rings, when grown in submerged cultures in a medium containing malt extract, glucose, and yeast extract. In experiment
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8. Successive Mineralization and Detoxification of Benzo[a]pyrene by the White Rot Fungus Bjerkandera sp. Strain BOS55 and Indigenous Microflora
White rot fungi can oxidize high-molecular-weight polycyclic aromatic hydrocarbons (PAH) rapidly to polar metabolites, but only limited mineralization takes place. The objectives of this study were to determine if the polar metabolites can be readily mineralized by indigenous microflora from several inoculum sources, such as activated sludge, forest soils, a
American Society for Microbiology.
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9. Comparison of phenanthrene and pyrene degradation by different wood-decaying fungi.
The degradation of phenanthrene and pyrene was investigated by using five different wood-decaying fungi. After 63 days of incubation in liquid culture, 13.8 and 4.3% of the [ring U-14C]phenantherene and 2.4 and 1.4% of the [4,5,9,10-14C]pyrene were mineralized by Trametes versicolor and Kuehneromyces mutabilis, respectively. No 14CO2 evolution was detected i
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10. DNA single strand breakage, DNA adducts, and sister chromatid exchange in lymphocytes and phenanthrene and pyrene metabolites in urine of coke oven workers.
OBJECTIVES: To investigate the specificity of biological monitoring variables (excretion of phenanthrene and pyrene metabolites in urine) and the usefulness of some biomarkers of effect (alkaline filter elution, 32P postlabelling assay, measurement of sister chromatid exchange) in workers exposed to polycyclic aromatic hydrocarbons (PAHs). METHODS: 29 coke o
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11. Fungal oxidation of (+/-)-9,10-dihydroxy-9,10-dihydrobenzo[a]pyrene: formation of diastereomeric benzo[a]pyrene 9,10-diol 7,8-epoxides.
The filamentous fungus Cunninghamella elegans oxidized (+/-) trans-9,10-dihydroxy-9,10-dihydrobenzo[a]-pyrene to a complex mixture of metabolites which were detected by high-pressure liquid chromatography. Two of the metabolites were identified as (+/-)7 beta, 8 alpha, 9 alpha, 10 beta-tetrahydroxy-7,8,9,10-tetrahydrobenzo[a]pyrene and (+/-)-7 beta,8 alpha,9
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12. Metabolism of Pyrene by the Basidiomycete Crinipellis stipitaria and Identification of Pyrenequinones and Their Hydroxylated Precursors in Strain JK375 †
The metabolism of pyrene, a polycyclic aromatic hydrocarbon, by submerged cultures of the basidiomycete Crinipellis stipitaria was studied. After incubation for 68 h at 25°C in a 20-liter fermentor with complex medium and 20 mg of pyrene per liter, five metabolites were detected. The compounds were isolated by preparative high-performance liquid chromatogra