Chemistry Kinetic
Mostrando 13-24 de 53 artigos, teses e dissertações.
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13. Utilização de sulfeto como doador de elétrons para a desnitrificação autotrófica aplicada ao tratamento de esgoto sanitário / Utilization of sulfide as electron donor in autotrophic denitrification applied to treatment of domestic sewage
The feasibility of autotrophic denitrification of effluent from anaerobic reactor treating domestic sewage using sulfide as electron donor was evaluated. Prior researches reveals sulfide into liquid phase of effluents and biogas can be utilized as electron donor for denitrification. However, information about the interaction between carbon, nitrogen and sulf
Publicado em: 2009
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14. CHARACTERIZATION OF IMAGES IN TEXTBOOKS AND THEIRS CONTRIBUTIONS TO THE SIGNIFICANCE TRIAL OF CHEMICAL EQUILIBRIUM CONCEPT / Caracterização de imagens em livros didáticos e suas contribuições para o processo de significação do conceito de equilíbrio químico
This work studies images contained in Chemistry textbooks approved by the PNLEM/2007. The goals of this research were: a) to characterize these images, discriminating those that compose Chemical Equilibrium Chapters, according to the chemical knowledge dimensions (macroscopic, submicroscopic and symbolic); and b) to evaluate the contributions brought by thes
Publicado em: 2009
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15. Interações de peroxirredoxinas citossólicas da levedura Saccharomyces cerevisiae com peróxidos. Estudos cinéticos e funcionais / Saccharomyces cerevisiae cytosolic peroxiredoxin interactions with peroxides. Kinetics and functional studies
Peroxiredoxins constitute a family of cysteine-based peroxidases that are able to reduce hydrogen peroxide, organic peroxides and peroxinitrite to water, alcohol and nitrite, respectively, through the use of reducing equivalents provided by thioredoxin, thioredoxin reductase and NADPH. Peroxiredoxins are abundant enzymes (correspond to approximately 0.7% of
Publicado em: 2009
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16. Inhibitor design for glyceraldehyde-3-phosphate dehydrogenase enzyme from Trypanosoma cruzi: structural biology and medicinal chemistry / Planejamento de inibidores da enzima gliceraldeído-3-fosfato desidrogenase de Trypanosoma cruzi: biologia estrutural e química medicinal
Parasitic diseases are the foremost threat to human health and welfare around the world. Chagasdisease (also called American trypanosomiasis) is a tropical parasitic disease which occurs in Latin America, particularly in South America. The currently available drugs for this parasitic disease have severe limitations, including poor efficacy and high toxicity.
Publicado em: 2008
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17. Synthesis and Molecular Modeling of Carbohydrate with Potential Anti-glucosidase Activity / Síntese e modelagem molecular de carboidratos com potencial atividade anti-glucosidase
Carbohydrates of glycoconjugates display high degree of complexity and structural diversity, playing a central role in biological processes. Glucosidases are enzymes that catalyze the cleavage of glycosidic bonds in oligosaccharides or glycoconjugates, being essentials in several metabolic pathways and in the biosynthesis of glycoproteins and glycosfingolipi
Publicado em: 2008
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18. Receptores de hormônios da tireóide: estudos computacionais, ressonância plasmônica de superfície e ensaios celulares / Thyroid hormone receptor: computational studies, surface plasmon resonance and cell based assays
The thyroid hormone receptors (TRs) are transcriptional factors involved in cell differentiation, development, metabolism and physiological function of most tissues. Many lines of evidence show that several pharmacological actions of TRs might be beneficial in medical therapy, specially those mediated by TR that target important medical conditions like obesi
Publicado em: 2008
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19. Chemiluminescent oxidation of luminol in micellar media: development of an anti-radical capacity assay / Oxidação quimiluminescente do luminol em meios micelares: desenvolvimento de uma ensaio para determinação da capacidade anti-radicalar
In this work, a methodology to evaluate the anti-radical capacity of hydrophilic and lipophilic compounds based on luminol chemiluminescence in micellar media was developed. The reaction of luminol, hemin and hydrogen peroxide was studied in the presence of charged surfactants (CTAB/CTAC and SDS). The concentration of each reagent was independently varied in
Publicado em: 2008
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20. Development of membrane biosensors and characterization of the interactions between cytochrome c and hybrid bilayer membranes by Surface Plasmon Resonance / Desenvolvimento de biosensores de membranas e caracterização da interação entre citocromo c e bicamadas híbridas por ressonância plasmônica de superfície
The aim of this work was to develop membrane biosensors based on Surface Plasmon Resonance (SPR) and to apply them to study the interactions between cytochrome c (cyt c) and model membranes. SPR is an optical technique that provides high-sensitivity measurements of refractive index (n), allowing the characterization of the adsorption and desorption of molecu
Publicado em: 2008
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21. Hydration study of ordinary portland cement in the presence of zinc ions
Hydration products of Portland cement pastes, hydrated in water and in the presence of zinc ions were studied comparatively at different ages. Hydration products were studied by X ray diffractions (XRD) and infrared spectroscopy (IR). Although IR is not frequently used in cement chemistry, it evidenced a new phase Ca(Zn(OH)3)2. 2H2O formed during cement hydr
Materials Research. Publicado em: 2007-12
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22. Modelagem da decomposição aeróbia de lodo de esgoto em solos com diferentes texturas
The overall assessment of soil clay content on several phases of sludge decomposition, monitored as CO2 evolution, was the main objective of this work. Different soil textures obtained from the same sample matrix allowed correlations of the soil clay content, microbial biomass and organic carbon using soil respiration monitored as cumulative CO2 generation.
Publicado em: 2007
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23. Estudo da ReaÃÃo de Desidro-aromatizaÃÃo nÃo oxidativa do Metano em Reator de Leito Fixo Diferencial com catalisador Ru- Mo/HZSM-5
Chemical routes suitable for the activation of methane to produce valuable products are limited and its achievement consists in a challenge to the chemistry of the natural gas conversion. Although remarkable progresses have been achieved on the methane dehydroaromatization (MDA) reaction, low conversion caused by severe thermodynamic limitations, coke format
Publicado em: 2007
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24. High-throughput screening in enzyme assays for epoxide hydrolases and monooxygenases activity detection using whole cell / Triagem de alto desempenho para detecção de atividade de epoxido-hidrolases e monooxigenases utilizando celulas integras
Biocatalysis is a multidisciplinary area, where new technologies are developing rapidly in order to offer unique options and solutions to different organic chemistry problems, complementing the classical synthetic chemistry. Facing the need imposed by progress in this area, this project aims at the implementation of high-throughput screening (HTS) methodolog
Publicado em: 2006