Aromatic Carboxylic Acids
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. Inhibition of Acetylcholinesterase by Coumarin-Linked Amino Acids Synthetized via Triazole Associated with Molecule Partition Coefficient
A previous study for the identification of acetylcholinesterase (AChE) inhibitors demonstrated that the hybrid between tyrosol, the 1,2,3-triazole nucleus, and the coumarin group, namely 7-({1-[2-(4-hydroxyphenyl)ethyl]-1H-1,2,3-triazol-4-yl}methoxy)-4-methyl-2H-chromen-2-one (10), has a high enzyme inhibitory activity. Here, we synthesized analogues of 10 v
J. Braz. Chem. Soc.. Publicado em: 2021-03
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2. PYROLIGNEOUS LIQUOR PRODUCED FROM ACACIA MEARNSII DE WILD WOOD UNDER CONTROLLED CONDITIONS AS A RENEWABLE SOURCE OF CHEMICALS
Acacia mearnsii de Wild (black wattle) is one of the most important trees planted in Southern Brazil for tannin extraction and charcoal production. The pyrolysis of the black wattle wood used for obtaining charcoal is performed in brick ovens, with the gas fraction being sent directly into the environment. The present study examines the condensable compounds
Quím. Nova. Publicado em: 2015-09
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3. Upgrade of Biofuels Obtained from Waste Fish Oil Pyrolysis by Reactive Distillation
Bio-oil is classified as second-generation biofuel and it is produced mainly through the pyrolysis of a waste lignocellulosic biomass base. The application of this product is still very limited, due to some of its chemical characteristics. This paper presents a proposal for the reduction of the acidity of bio-oil obtained from waste fish oil, previously prod
J. Braz. Chem. Soc.. Publicado em: 2015-02
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4. Otimização do processo de mineralização de compostos orgânicos utilizando sistemas eletro-Fenton e fotoeletro Fenton por irradiação UV artificial e solar
OPTIMIZATION OF THE MINERALIZATION PROCESS OF ORGANIC COMPOUNDS USING ELECTRO-FENTON AND PHOTO-FENTON SYSTEMS BY ARTIFICIAL AND SOLAR UV IRRADIATION Electrochemical advanced oxidation processes based on the Fentons reaction, such as electro-Fenton (EF) and photoelectro-Fenton (PEF) using artificial and solar UV irradiation were employed in the treatment of e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
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5. Compostagem de esterco de galinha: composiÃÃo quÃmica da matÃria orgÃnica e extraÃÃo de substÃncias hÃmicas / Chicken manure composting: organic matter composition and humic substances extraction
The agro-industrial activities are responsible for the generation of large amounts of organic waste, and composting is an efficient process for the treatment of such waste; humification degree is an important parameter for determining the quality of the compost produced. This study aims to evaluate the dynamics of humification of organic matter during compos
Publicado em: 2009
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6. Dexametasona : interação com ácidos carboxílicos aromáticos no estado sólido / Dexamethasone : interaction with aromatic carboxylic acids in solid-state
A dexametasona (DEX) está entre os glicocorticóides mais comumente descritos para uso sistêmico apresentando uma atividade gliconeogênica, imunossupressora e antiinflamatória bem difundida. Apresenta, em sua estrutura, sítios com potencial capacidade de interação com outras moléculas. Alguns ácidos carboxílicos aromáticos (ACA) e seus derivados s
Publicado em: 2008
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7. Matéria orgânica de Latossolos Húmicos: análises térmica e espectroscópica, efeito do uso e correção química / Organic matter of humic Latosol (Oxisol): thermal and spectroscopic analyses, land use and chemical correction
The objective of this study was to contribute to the clarification of several aspects related to the behavior of organic matter (OM) in highly weathered tropical soils. Six samples of humic A horizon Latosol were collected from three sites in Minas Gerais: i) Sericita, (under coffee crop, pasture, ferns and Atlantic Forest fragment); ii) Mutum (under Atlanti
Publicado em: 2008
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8. Reaction of aromatic carboxylic acids with isocyanates using ionic liquids as novel and efficient media
Líquidos iônicos (ILs) baseados em 1,3-dialquilimidazólio e amônea têm sido usados como meio de reação eficiente para amidação de diversos ácidos carboxílicos com isocianatos. Esse método tem larga aplicação e o procedimento é suave e eficiente quando comparado aos métodos existentes, baseados em solventes convencionais. O "projeto" adequado
Journal of the Brazilian Chemical Society. Publicado em: 2007
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9. Influence of apparent molecular size from aquatic humic substances in the coagulation efficiency with aluminium sulfate and ferric chloride / Influência do tamanho molecular aparente das substâncias húmicas aquáticas na eficiência da coagulação com sulfato de alumínio e cloreto férrico
Water sources used to supply the public water system frequently have a relatively high true color intensity due to dissolved aquatic humic substances (AHS). In this study, water samples were collected from the Itapanhaú River (Bertioga, SP, Brazil), which exhibited a true color intensity in the order of 300 Hanzen units. XAD-8 resin was used to extract AHS.
Publicado em: 2007
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10. Identificação de constituintes químicos potencialmente envolvidos na reversão de alvura de polpa Kraft branqueada pelas seqüências OZDHT (PO)D e OZ/EDP / Chemical representatives identification potentially involved in the reversion of whiteness of pulp kraft whitened by the sequences OZDHT(PO)D and OZIEDP
The pulp and paper section significantly contributes to the Brazilian economy. The industries produces million of tons of pulp yearly, yielding superavit of billion of dollars in the section of paper and pulp. The quality of Kraft cellulose commercialized in the international marked is evaluated, mainly because of its physical properties, anatomical characte
Publicado em: 2005
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11. Síntese e caracterização de substâncias semelhantes aos ácidos húmicos de carvão de eucalipto, e sua interação com diclorofenol, cálcio, manganês e alumínio / Synthesis and characterization of humic acid-like substances from eucalypt charcoal, and its interaction with diclorofenol, calcium, manganese and aluminium
A wide range of commercial products containing humic substances have been applied successfully in agricultural and environmental remediation systems. Regarding their beneficial remediation characteristics, there is a high potential to adsorb heavy metals and organic pollutants, thus reducing their bioavailability. Industrially, they are extracted from non-re
Publicado em: 2005
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12. Redução eletroquímica de cinamatos de metila orto-substituídos / Electrochemical reduction of ortho-substituted methyl cinnamates
The synthesis and electrochemical reduction in DMF of some ring substituted cinnamic esters are described. The main objective if this work is to verify the influence of the substituents on the electrohydrodimerization (EHD). The substrates studied were the methyl esters of o-methyl- (1), o-chloro- (2), o-nitro- (3), m,p-dichloro- (4), m-chloro- (5), p-chloro
Publicado em: 2004