Polycyclic Compounds
Mostrando 13-24 de 126 artigos, teses e dissertações.
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13. Química entre a microcamada superficial oceânica e os aerossóis marinhos
The sea surface microlayer (SML), although poorly understood, is important in biogeochemical cycling and sea - air exchanges; it is a source or a sink for a range of pollutants. In this paper, an overview of sampling techniques and the role of SML in biogeochemical cycles and climate is presented. The chemical and biological nature of the ocean surface film
Quím. Nova. Publicado em: 2014
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14. Secretion of laccase and manganese peroxidase by Pleurotus strains cultivate in solid-state using Pinus spp. sawdust
Pleurotus species secrete phenol oxidase enzymes: laccase (Lcc) and manganese peroxidase (MnP). New genotypes of these species show potential to be used in processes aiming at the degradation of phenolic compounds, polycyclic aromatic hydrocarbons and dyes. Hence, a screening of some strains of Pleurotus towards Lcc and MnP production was performed in this w
Braz. J. Microbiol.. Publicado em: 19/03/2013
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15. Efeitos energético-estruturais em compostos heteropolicíclicos com oxigénio ou enxofre
The present article involves a comparative study of the influence of oxygen or sulfur heteroatoms present in the central ring of polycyclic compounds, in order to clarify the correlation between the respective thermophysical or thermochemical properties and structural characteristics. Considering the importance of these types of compounds for their broad spe
Quím. Nova. Publicado em: 2013
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16. Properties of catechol 1,2-dioxygenase in the cell free extract and immobilized extract of Mycobacterium fortuitum
Polycyclic aromatic hydrocarbons (PAH) are carcinogenic compounds which contaminate water and soil, and the enzymes can be used for bioremediation of these environments. This study aimed to evaluate some environmental conditions that affect the production and activity of the catechol 1,2-dioxygenase (C12O) by Mycobacterium fortuitum in the cell free and immo
Braz. J. Microbiol.. Publicado em: 2013
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17. ESTUDO COMPARATIVO ENTRE EXTRAÇÃO SOXHLET E ULTRASOM PARA DETERMINAÇÃO DE HIDROCARBONETOS POLICÍCLICOS AROMÁTICOS EM SEDIMENTOS DO ESTUÁRIO DO RIO SERGIPE POR CROMATOGRAFIA A GÁS ACOPLADA A ESPECTROMETRIA DE MASSAS. / COMPARATIVE STUDY OF EXTRACTION SOXHLET AND ULTRASOUND DETERMINATION FOR OIL POLYCYCLIC AROMATIC SEDIMENTS SERGIPE RIVER ESTUARY BY GAS CHROMATOGRAPHY MASS SPECTROMETRY ATTACHED.
Polycyclic aromatic hydrocarbons (PAHs) are compounds that can be found in environmental compartments such as atmosphere, soil, sediment and water. Throughout bioaccumulation, they can also be incorporated into vegetables and animals tissues. They are mainly originated from anthropogenic sources such as fossil fuels and biomass burnings. Due they potential t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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18. Estudo do potencial anticÃncer de novos derivados acridÃnicos sintÃticos em modelos experimentais in vitro. / Study of the potential of new anticancer synthetic acridine derivatives in experimental models in vitro.
Acridines are planar aromatic polycyclic molecules that have the ability to progress in nuclear DNA. Many of its representatives have antibacterial, antiparasitic and antitumor. This study evaluated the cytotoxic potential of 22 new acridine compounds in strains of human tumor cells. Among these, four compounds [5-(acridin-9-yl-methilene)-3-(4-methyl-benzyl)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/01/2010
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19. Skeletal and chlorine effects on 13C-NMR chemical shifts of chlorinated polycyclic systems
Com o objetivo de realizar uma análise comparativa do efeito de compressão anelar e do Cl no deslocamento químico dos carbonos clorados tencionados, foram analisados os deslocamentos químicos de 27 estruturas policíclicas cloradas e não cloradas derivadas dos inseticidas “aldrin” (5) e “isodrin” (14). Os compostos foram divididos em quatro grup
Publicado em: 2010
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20. Incorporação de triciclo[6.2.1.02,7]undeca-4,9-dieno-3,6-diol como uma unidade de restrição conformacional de análogos peptídicos / Tricyclo[6.2.1.02,7] undeca-4,9- diene-3,6- diol incorporated in conformational constrained peptides analogues
O objetivo deste trabalho é a obtenção de um derivado peptídico incorporado da unidade triciclo[6.2.1.02,7]undeca-4,9-dieno-3,6-diol, obtida a partir da reação de Diels-Alder do ciclopentadieno e da pbenzoquinona, seguida de redução. A condensação em solução do tripeptídeo (Gly-L-AlaGly) com o diol produz um derivado capaz de assumir uma conform
Publicado em: 2010
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21. 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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22. Desenvolvimento e validação de metodologia analítica para determinação de hidrocarbonetos policíclicos aromáticos (HPAS) em sedimentos. Avaliação da represa do Parque Pedroso, Santo André, SP / Development and validation of analytical methodology for determination of polycyclic aromatic hydrocarbons (PAHs) in sediments. Assessment of Pedroso Park Dam, Santo André, SP
The polycyclic aromatic hydrocarbons (PAHs), by being considered persistent contaminants, by their ubiquity in the environment and by the recognition of their genotoxicity, have stimulated research activities in order to determine and evaluate their sources, transport, processing, biological effects and accumulation in compartments of aquatic and terrestrial
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2009
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23. Emissões atmosféricas decorrentes da combustão do diesel : aldeídos e HPAS
Resumo: Neste trabalho, determinou-se a concentração i) 21 compostos carbonílicos (CC) no ar atmosférico formaldeído, acetaldeído, acetona, acroleína, propanal, butanal, butanona, (E)-but-2-enal, isobutenal, benzaldeído, isopentanal, pentanal, o-tolualdeído, p-tolualdeído, m-tolualdeído, hexanal, 2,5-dimetilbenzaldeído, heptanal, octanal, etil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2009
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24. Estudo da degradação de hidrocarbonetos policíclicos aromáticos a partir da reação de fenton utilizando magnetitas dopadas com cobalto
The awareness regarding Polycyclics Aromatic Hydrocarbons (PAHs), petroleum derivatives, has been increasing over the years due to their toxic, carcinogenic and mutagenic characteristics. The increase on the use of petroleum and its derivatives as energy source has induced many accidents spilling liquid effluent in the environment, making harm to biota, incl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/03/2009