3 Hydroxyphenylacetic Acid
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Estudo teórico das reações de eletropolimerização dos ácidos 3- hidroxifenilacético e 3-hidroxibenzóico e caracterização experimental do poli (ácido-3-hidroxibenzóico) / Theoretical study of the electropolymerization reaction of 3- hydroxyphenylacetic acids and 3-hydroxybenzoic and experimental characterization of poly (3-hydroxybenzoic acid)
Neste trabalho foi feito o estudo teórico do mecanismo de polimerização dos ácidos 3-hidroxifenilacético (3-HFA) e 3-hidroxibenzóico (3-HBA) e caracterização do material polimérico obtido na eletropolimerização do 3-HBA. A partir da modelagem molecular do 3-HFA e intermediários, análise das propriedades derivadas da estrutura eletrônica, foi po
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/2011
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2. Synthesis, characterization and application of poly(3- hydroxyphenylacetic acid) in the development of a biosensor for detection of cardiac marker / Síntese, caracterização e aplicação do poli (ácido 3-Hidroxifenilacético) no desenvolvimento de biossensor para detecção de marcador cardíaco
Neste trabalho foram realizados estudos de caracterização de um novo material, o poli(ácido 3-hidroxifenilacético) e sua aplicação para construção de um imunossensor amperométrico para detecção do Infarto Agudo do Miocárdio (IAM). Inicialmente, foi realizada a eletropolimerização do ácido 3-hidroxifenilacético em três pHs diferentes (0,0; 6,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2011
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3. Bioeletrodo para detecção da amilase salivar humana
Capítulo II: A alfa-amilase salivar é uma das proteínas mais abundantes da saliva e diversos estudos avaliam diferenças na concentração e atividade da HSA com o objetivo de utilizá-la como possível biomarcador para o diagnóstico precoce e acompanhamento de algumas doenças. Este estudo descreve a preparação e purificação da alfa-amilase salivar
Publicado em: 2010
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4. p-Hydroxyphenylacetic Acid Metabolism in Pseudomonas putida F6
Pseudomonas putida F6 was found to metabolize p-hydroxyphenylacetic acid through 3,4-dihydroxyphenylacetic acid, 3,4-dihydroxymandelic acid, and 3,4-dihydroxybenzaldehyde. Cell extracts of P. putida F6 catalyze the NAD(P)H-independent hydroxylation of p-hydroxyphenylacetic acid to 3,4-dihydroxyphenylacetic acid which is further oxidized to 3,4-dihydroxymande
American Society for Microbiology.
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5. Bacterial Degradation of 4-Hydroxyphenylacetic Acid and Homoprotocatechuic Acid
A species of Acinetobacter and two strains of Pseudomonas putida when grown with 4-hydroxyphenylacetic acid gave cell extracts that converted 3,4-dihydroxyphenylacetic acid (homoprotocatechuic acid) into carbon dioxide, pyruvate, and succinate. The sequence of enzyme-catalyzed steps was as follows: ring-fission by a 2,3-dioxygenase, nicotinamide adenine dinu
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6. Degradation of 4-chlorophenylacetic acid by a Pseudomonas species.
Pseudomonas sp. strain CBS3 was able to utilize 4-chlorophenylacetic acid as the sole source of carbon and energy. When this strain was grown with 4-chlorophenylacetic acid, homoprotocatechuic acid was found to be an intermediate which was further metabolized by the meta-cleavage pathway. Furthermore, three isomers of chlorohydroxyphenylacetic acid, two of t
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7. Production of Skatole and para-Cresol by a Rumen Lactobacillus sp. †
The objective of this study was to examine the substrate specificity of several ruminal strains of a Lactobacillus sp. which previously was shown to produce skatole (3-methylindole) by the decarboxylation of indoleacetic acid. A total of 13 compounds were tested for decarboxylase activity. The Lactobacillus strains produced p-cresol (4-methylphenol) by the d
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8. Degradation of 4-hydroxyphenylacetic acid by Trichosporon cutaneum.
Trichosporon cutaneum degraded 4-hydroxyphenylacetic acid to acetoacetic and malic acids. 3.4-Dihydroxyphenylacetic acid, an intermediate in the reaction sequence, underwent hydroxylation before the benzene ring was cleaved.
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9. Precursors and metabolites of phenylethylamine, m and p-tyramine and tryptamine in human lumbar and cisternal cerebrospinal fluid.
Phenylacetic acid, p-hydroxyphenylacetic acid, m-hydroxyphenylacetic acid, phenylalanine, indoleacetic acid, 5-hydroxyindoleacetic acid and tryptophan were measured in lumbar and cisternal cerebrospinal fluid (CSF) taken during pneumoencephalography. The data suggest that the concentration of the acid metabolites of the trace amines tryptamine, phenylethylam
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10. Identification of 2,3-dihydroxybenzoic acid as a Brucella abortus siderophore.
Brucella abortus grown in low-iron medium or in the presence of iron chelators [ethylenediamine-di(o-hydroxyphenylacetic acid) and 2,2-dipyridyl] showed reduced cell yields and released a material positive in chemical and biological assays for catechols. This material was purified from culture fluids of B. abortus 2308 by chromatography on agarose-iminodiace
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11. Molecular determinants of the hpa regulatory system of Escherichia coli: the HpaR repressor
The HpaR-mediated regulation of the hpa-meta operon (Pg promoter) of the 4-hydroxyphenylacetic acid catabolic pathway of Escherichia coli has been studied. The HpaR regulator was purified to homogeneity showing that it is able to bind selectively to 4-hydroxyphenylacetic, 3-hydroxyphenylacetic and 3,4-dihydroxyphenylacetic acids, which act as inducers of the
Oxford University Press.
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12. Metabolism of l-Tyrosine to 4-Hydroxybenzaldehyde and 3-Bromo-4-Hydroxybenzaldehyde by Chloroplast-containing Fractions of Odonthalia floccosa (Esp.) Falk 1
The biosynthesis of 4-hydroxybenzaldehyde and 3-bromo-4-hydroxybenzaldehyde from l-[U-14C]tyrosine has been demonstrated in chloroplast-containing fractions obtained by differential and isopycnic centrifugation from the marine red alga Odonthalia floccosa. Surfactant and high speed centrifugation studies indicate that the biosynthetic pathway involves a part