Pyrene Chemical
Mostrando 1-12 de 46 artigos, teses e dissertações.
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1. Synthesis, Physicochemical and Photophysical Characterization of 4-(1-Pyrenyl)-butyl-α-D-mannopyranoside
Glycolipids are biomolecules composed of a lipid chain (lipophilic) and a monosaccharide or oligosaccharide as hydrophilic group. Their chemical structure and biological role make them undoubtedly good candidates for a large and continuously growing number of biotechnological applications. Mannose is a carbohydrate present on membrane glycolipids of a wide n
J. Braz. Chem. Soc.. Publicado em: 2016-02
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2. ASSOCIATION OF BRANCHED POLYETHYLENE IMINE WITH SURFACTANTS IN AQUEOUS SOLUTION
Three polymer-surfactant systems comprised of branched polyethylene imine (PEI) with an anionic surfactant (sodium dodecylsulfate; SDS), a cationic surfactant (tetradecyltrimethylammonium bromide; TTAB), and a zwitterionic surfactant (
N -tetradecyl-N ,N -dimethyl-3-ammonio-1-propanesulfonate; SB3-14) were stQuím. Nova. Publicado em: 2015-07
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3. Utilização de um adsorvente natural para remoção de pireno em meio aquoso
Neste trabalho, duas amostras de turfa (uma decomposta - TD, e outra fibrosa - TF), foram caracterizadas através de várias técnicas instrumentais, incluindo a microscopia eletrônica de varredura (MEV), a análise elementar (CHNS), a análise termogravimétrica (TG), a espectroscopia de infravermelho com Transformada de Fourier (FT-IR) e a espectroscopia
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/07/2011
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4. Genotoxicidade e composição do material particulado emitido pela queima de Biomassa: um estudo de caso em Tangará da Serra, Região da Amazônia Brasileira
Tangara da Serra is located on southwestern Mato Grosso and is found to be on the route of pollutants dispersion originated in the Legal Amazons deforestation area. This region has also a wide area of sugarcane culture, setting this site quite exposed to atmospheric pollutants. The objective of this work was to evaluate the genotoxicity of three different co
Publicado em: 2010
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5. Hidrocarbonetos policíclicos aromáticos (HPAS) em cachaça, rum, uísque e álcool combustível
The concentration of 15 polycyclic aromatic hydrocarbons (PAHs) in 57 samples of distillates (cachaça, rum, whiskey, and alcohol fuel) has been determined by HPLC-Fluorescence detection. The quantitative analytical profile of PAHs treated by Partial Least Square - Discriminant Analysis (PLS-DA) provided a good classification of the studied spirits based on
Química Nova. Publicado em: 2009
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6. Degradação de naftaleno, fenantreno e benzo(a)pireno em solos e sedimentos de ambientes costeiros, oceânicos e antárticos / Degradation of naphthalene, phenanthrene e benzo(a)pyrene in soil and sediments of coastal, oceanic and Antarctic environments
Petroleum is the main source of fuel, and the operations of exploration, transportation, refining and distribution are potential sources of environmental pollution. In contaminated environments, the degradation of PAHs (Polycyclic Aromatic Hydrocarbons) depends on climatic factors, soil and microbial population. This study aimed to assess the potential for d
Publicado em: 2008
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7. Morphologic and physical - chemical characterization of fruits and seeds of a natural population of Astrocaryum aculeatum Meyer (Arecacea) of a secondary forest / CARACTERIZAÇÃO MORFOLÓGICA E FÍSICOQUÍMICA DE FRUTOS E SEMENTES DE Astrocaryum aculeatum Meyer (Arecaceae), DE UMA FLORESTA SECUNDÁRIA
Astrocaryum aculeatum Meyer, known popularly as tucumã or tucumanzeiro, is a palm tree that occurs in Amazon regions with a great diversity. It is used in many different ways. It also has a social economic importance for the local communities in specially because of the edible pulp extracted from this fruit. This work has the main objective to study the mor
Publicado em: 2008
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8. 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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9. 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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10. 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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11. 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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12. Chemical carcinogens produce mutations to ouabain resistance in transformable C3H/10T1/2 Cl 8 mouse fibroblasts.
Chemical carcinogens induce mutations to ouabain resistance in the transformable mouse fibroblast cell line C3H/10T1/2 Cl 8. The mutant phenotype is stable and heritable in the absence of selective agent, and dose--response curves for mutant frequency were obtained with N-menthyl-N'-nitro-N-nitrosoguanidine, 3-methylcholanthrene, benzo[a]-pyrene, N-acetoxy-N