Biochemical Reactions
Mostrando 37-48 de 524 artigos, teses e dissertações.
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37. alfa e b-glucosidases como alvos moleculares para desenvolvimento de fármacos
Glucosidases are involved in key steps in the processing of oligosaccharides by cleaving O-glucose residues. Since they catalyze breaking and transfer reactions of glucosidic groups for the normal growth and development of all the cells, defects or genetic deficiencies in these enzymes are associated with serious disorders of the carbohydrate metabolism. Thu
Química Nova. Publicado em: 2006-07
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38. Applications of bioinspired computing in bioinformatics : analyzing the role of genes and their interactions / Aplicações de computação bioinspirada em bioinformatica : investigando o papel dos genes e suas interações
This dissertation deals with genetic networks, the mechanism of control of gene activity in cells, under three different computational perspectives. Initially, as an engineering approach, a computational tool for inference of genetic networks is proposed, which is able to recover the static structure of these networks from experimental datasets. This systems
Publicado em: 2006
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39. A fuzzy logic algorithm for identification of the harvesting threshold during PGA production by Bacillus megaterium
Penicillin G acylase (PGA) is an important enzyme used as biocatalyst in the production of semisynthetic beta-lactam antibiotics. Many microorganisms produce this enzyme and recombinant Escherichia coli has been preferred use for industrial applications. Bacillus megaterium is one of the microorganisms that excretes this enzyme into the medium. As a conseque
Brazilian Journal of Chemical Engineering. Publicado em: 2005-12
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40. Changes in the biogenic amine content of the prefrontal cortex, amygdala, dorsal hippocampus, and nucleus accumbens of rats submitted to single and repeated sessions of the elevated plus-maze test
It has been demonstrated that exposure to a variety of stressful experiences enhances fearful reactions when behavior is tested in current animal models of anxiety. Until now, no study has examined the neurochemical changes during the test and retest sessions of rats submitted to the elevated plus maze (EPM). The present study uses a new approach (HPLC) by l
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-12
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41. Riboflavina: uma vitamina multifuncional
Riboflavin, a component of the B2 vitaminic complex, plays important roles in biochemistry, especially in redox reactions, due to the ability to participate in both one- and two-electron transfers as well as acting as a photosensitizer. Accordingly, low intakes of this vitamin have been associated with different diseases, including cancer and cardiovascular
Química Nova. Publicado em: 2005-10
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42. Modelagem analítico-estocástica de doenças priônicas
In this work one studies several characteristics of the so called prionic diseases, a pathogeny caused by protein molecules, known as Prions. Prions can exist in two different molecular conformations. The first of these, known as PrPC, is normally found in mammals, whilst the second, known as PrPSc, is the rare pathogenic form, responsible for the developmen
Publicado em: 2005
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43. Análise microbiológica do quefir em grãos, suspensão liofilizado e adicionado à ração de coelhos / Microbiological analysis of kefir preparations (grains, fermented suspensions, lyophilized) and kefir added to pellets diet for rabbits
Probiotics are supplementary foods produced by living microorganisms that improve animal health by promoting balance of the intestinal microbiota To be considered probiotic the microorganism must either be a normal inhabitant of the gastrointestinal tract survive the passage through the stomach resist the action of digestive enzymes and bile and keep its via
Publicado em: 2005
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44. Development and application of procedures envelopemend chemiluminescent reactions in flow for determination of analytes of interest in food, pharmaceutical and biochemistry. / Desenvolvimento e aplicação de procedimentos envolvendo reações quimiluminescentes em fluxo para a determinação de analitos de interesse alimentício, farmacêutico e bioquímico.
In this work, analytical flow procedures were developed using multicommutation concept and chemiluminescent detection for the determination of hydrogen peroxide, glucose and cholesterol in food, biochemistry and pharmaceutical samples. A personal computer Pentium 233 MHz equipped with PCL 711S interface was employed to control the flow manifold and data acqu
Publicado em: 2005
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45. Determinação eletroquímica da capacidade antioxidante para avaliação do exercício físico
Physical training can adapt or cause injury to skeletal muscles implicating metabolic alterations, which can be detected by biochemical analysis. Apparently the increase in the production of reactive oxygen species (ROS) is involved in both processes. Enzymatic and low molecular weight antioxidants (LMWA) minimize ROS's deleterious action through redox react
Química Nova. Publicado em: 2004-12
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46. Queijos: aspectos químicos, bioquímicos e microbiológicos
This article presents a brief historical outline of cheese manufacture. Chemical, biochemical and microbiological aspects are presented: the main constituents of curd, the reactions involved in the development of flavour, and the role of micro-organisms and enzymes in the fermentation and maturation processes. A brief description of the characteristics of so
Química Nova. Publicado em: 2004-04
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47. Determinação da pureza varietal em lotes de sementes de milho através de marcadores morfológicos e microssatélites. / Determination of varietal purity in maize seed lots using morphological and microsatellites markers.
Maize inbred lines seed production has been conducted to avoid the presence of varietal contamination since it compromises the subsequent multiplication phases within the commercial seed program. Contaminant seeds are detected through varietal and/or genetic purity determination tests which are usually based on morphological and biochemical markers, dependin
Publicado em: 2004
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48. Extra-cellular matrix changes in Schistosoma mansoni-infected Biomphalaria glabrata
Reactivity of snails against parasites exhibits a primitive focal reaction, with encapsulation, phagocytosis and destruction of parasite larvae by macrophage-like cells - the hemocytes. This reaction mimics granulomatous inflammation seen in higher animals. However, different from the latter, little is known about the participation of extra-cellular matrix i
Memórias do Instituto Oswaldo Cruz. Publicado em: 2003-01