Phenanthrene
Mostrando 1-12 de 165 artigos, teses e dissertações.
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1. RING CURRENT IN ANTHRACENE AND PHENANTHRENE: CORRECTION TO HÜCKEL PARAMETERS
Excessive degeneracy in the ground state of the π-electron energy levels of anthracene was removed using the Hückel method by correcting the Coulomb integral of the four central carbon atoms. A further correction to the resonance integral was proposed based on the ring-current model, which describes the π-ring current flow along the molecule’s perimeter
Química Nova. Publicado em: 2022
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2. Anaerobic biodegradation of benzo(a)pyrene by a novel Cellulosimicrobium cellulans CWS2 isolated from polycyclic aromatic hydrocarbon-contaminated soil
Abstract Cellulosimicrobium cellulans CWS2, a novel strain capable of utilizing benzo(a)pyrene (BaP) as the sole carbon and energy source under nitrate-reducing conditions, was isolated from PAH-contaminated soil. Temperature and pH significantly affected BaP biodegradation, and the strain exhibited enhanced biodegradation ability at temperatures above 30 °
Braz. J. Microbiol.. Publicado em: 2018-06
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3. Gas-Phase Polycyclic Aromatic Hydrocarbons in the Parking Lot Impacted by Light-Duty Vehicles Burning Gasoline and Ethanol Blends
In order to study the emission of vapor-phase polycyclic aromatic hydrocarbons (PAHs) by light-duty vehicles burning gasoline and ethanol blends, air samplings were performed at a parking lot in Londrina, PR, Brazil. The samples were obtained during the summer and winter 2012. The semi-volatile PAHs were collected using a cartridge packed with XAD-2 resin, e
J. Braz. Chem. Soc.. Publicado em: 2016-09
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4. Sphingomonas from petroleum-contaminated soils in Shenfu, China and their PAHs degradation abilities
Abstract Members of the Sphingomonas genus are often isolated from petroleum-contaminated soils due to their unique abilities to degrade polycyclic aromatic hydrocarbons (PAHs), which are important for in situ bioremediation. In this study, a combined phenotypic and genotypic approach using streptomycin-containing medium and Sphingomonas -specific PCR was de
Braz. J. Microbiol.. Publicado em: 2016-06
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5. Morphological changes and growth of filamentous fungi in the presence of high concentrations of PAHs
In this study, we evaluated the effect of low and high molecular weight polycyclic aromatic hydrocarbons (PAHs),
i.e. , Phenanthrene, Pyrene and Benzo[a]pyrene, on the radial growth and morphology of the PAH-degrading fungal strainsAspergillus nomius H7 andTrichoderma asperellum H15. The presence of PAHsBraz. J. Microbiol.. Publicado em: 2015-09
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6. Genotoxic effect of Phenanthrene on Chironomus sancticaroli (Diptera: Chironomidae)
Phenanthrene, a Polycyclic Aromatic Hydrocarbon, remains adsorbed to sedimentary particles in aquatic environments. It affects mainly benthic organisms, and is considered potentially genotoxic. In ecotoxicology, species of Chironomus Meigen, 1803 are widely known as bioindicators of the effects of chemicals on aquatic organisms. This study investigates the e
Zoologia (Curitiba). Publicado em: 2014-08
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7. Avaliação da eficiência de degradação de hidrocarbonetos aromáticos por bactérias provinientes de estação de tratamento de efluente de refinaria de petróleo
Three bacterial strains were isolated from the activated sludge system of petroleum refinery wastewater, identified by partial sequencing of 16S rDNA, and classified as Acinetobacter genomospecies 3, Bacillus pumilus, and Bacillus flexus. The degradation efficiency of aromatic hydrocarbons was evaluated by gas chromatography with a flame ionization detector.
Quím. Nova. Publicado em: 2014
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8. The effects of trace elements, cations, and environmental conditions on protocatechuate 3,4-dioxygenase activity
Phenanthracene is a highly toxic organic compound capable of contaminating water and soils, and biodegradation is an important tool for remediating polluted environments. This study aimed to evaluate the effects of trace elements, cations, and environmental conditions on the activity of the protocatechol 3,4-dioxygenase (P3,4O) enzyme produced by the isolate
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-04
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9. Degradação de fenantreno em latossolo: efeito da concentração do contaminante e da adição de surfactina / Phenanthrenes degradation in latosol: effect of contaminants concentration and the addition of surfactin
Os hidrocarbonetos policíclicos aromáticos (HPAS) são constituídos exclusivamente por átomos de carbono e hidrogênio e organizados sob forma linear, angular ou agrupada. Diversos HPA ao sofrerem ativação enzimática, tendem a ligar-se ao DNA, c ausando erros de replicação e mutações. Muitas dessas moléculas são reconhecidas como tóxicas, mutag
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/07/2011
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10. PHENANTHRENE AND ALKYL HOMOLOGOUS METABOLITES FORMATION AND IDENTIFICATION IN CRAB UCIDES CORDATUS / FORMAÇÃO E IDENTIFICAÇÃO DE METABOLITOS DE FENANTRENO E HOMÓLOGOS ALQUILADOS EM CARANGUEJO UCIDES CORDATUS
The main goal of this study was to evaluate the formation of phenanthrenes metabolites, parental and alkylated, in crabs Ucides cordatus urine. Laboratory experiments were carried out exposing organisms to phenanthrene (2 ug.kg-1 and 3 ug.kg-1), to the phenanthrene homologues alkylated, 1-methylphenanthrene and 2,6,9-trimethylphenanthrene (0,0125 ug.kg-1 and
Publicado em: 2010
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11. 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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12. Remaining phenanthrene as a tool for accessing bioavailability of polycyclic aromatic hydrocarbon in soils / Fenantreno remanescente para a avaliação de biodisponibilidade de hidrocarbonetos policíclicos aromáticos em solos
Os hidrocarbonetos aromáticos policíclicos (PAHs) são contaminantes gerados pela combustão incompleta da matéria orgânica. Existe uma grande preocupação com relação aos seus efeitos sobre o meio ambiente e à saúde humana. A biodisponibilidade dos PAHs tem conseqüências significativas para o ambiente e para os seres humanos, uma vez que esses co
Publicado em: 2009