Effective Degradation
Mostrando 37-48 de 394 artigos, teses e dissertações.
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37. A methodology for performance evaluation of LEDs based on ac small signal analysis
This paper shows fundamentals and results that support a promising methodology for evaluation in locus of a LED from its own radiating signal, and that allows monitoring of its aging by remote inference on which degradation mechanism is acting internally to the device's structure. It brings out also an alternative route for estimation of parameters of the Sh
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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38. Azo dye degradation by Phanerochaete chrysosporium in the medium enriched with nitrogen in the presence of primary co-substrate
This work sought to evaluate the ability of fungi Phanerochaete chryosporium to degrade congo red azo dye in batch reactor, evaluate the influence of glucose and wheat bran as co-substrates on the removal of the dye in the medium and investigate the influence of ammonium chloride, ammonium nitrate and ammonium sulfate as the inorganic nitrogen source for the
Braz. arch. biol. technol.. Publicado em: 2013-10
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39. Influence of the polyhedral oligomeric silsesquioxane n-phenylaminopropyl: POSS in the thermal stability and the glass transition temperature of epoxy resin
In this study, epoxy nanocomposites containing different fractions of n-phenylaminopropyl (POSS) were prepared. The nanocomposites were studied by transmission electron microscopy (TEM), gel content, dynamic-mechanical analysis (DMA) and thermogravimetric analysis (TGA). The parameters for Avrami's equation were calculated from the degradation curves. The di
Polímeros. Publicado em: 18/06/2013
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40. Developments in the use of nanocapsules in oncology
The application of nanotechnology to medicine can provide important benefits, especially in oncology, a fact that has resulted in the emergence of a new field called Nanooncology. Nanoparticles can be engineered to incorporate a wide variety of chemotherapeutic or diagnostic agents. A nanocapsule is a vesicular system that exhibits a typical core-shell struc
Braz J Med Biol Res. Publicado em: 28/05/2013
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41. Avaliação histométrica do reparo de defeito ósseo em calvária de rato após implante de rhMMP-2 ligada à monoleína / Histometric evaluation of bone healing after implantation with rhMMP-2 linked to monolein into rat calvarial defects
Matrix metalloproteinases (MMPs) are zinc-dependent proteolytic enzymes that degrade extracellular matrix components, facilitating cell migration and tissue remodeling. MMPs secreted by osteclasts are important in the physiological bone resorption as in pathological bone degradation. However, the essentially bone absorbing hole of MMPs, particularly of the M
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2012
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42. Desenvolvimento de métodos para estudo de dioxinas presentes na cinza do bagaço da cana-de-açúcar : avaliação do potencial biorremediador de cepas microbianas em compostagem aeróbica / Development of methods for the study of dioxins in sugarcane bagasse ash: evaluation of bioremediation potential of microbial strains in aerobic composting
Sugarcane bagasse ash is a byproduct of sugar and alcohol industry with potential for field application. However, the presence of organic contaminants such as dioxins turns necessary the development of strategies for removal of those pollutants, such as bioremediation. Because of the high toxicity of dioxins, it is wise to develop effective and low risk meth
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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43. Tratamento de Ãgua residuÃria de fecularia em reator anaerÃbio com leito fixo de pedras de calcÃrio dolomÃtico / Starch wastewater treatment in anaerobic reactor containing Dolomitic limestone
The cassava processing for starch or flour production generates some wastewater (manipueira) with high organic load and toxic compounds, which cause environmental degradation. In the western Paranà region, there are several starch factories, so its waste generation is a concern for the correct treatment and disposal. Thus, anaerobic reactors are a cost-effe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/02/2012
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44. PROTETORES SOLARES À BASE DE FILTROS INORGÂNICOS: DESENVOLVIMENTO E CARACTERIZAÇÃO
The inorganic sunscreens represented mainly by titanium dioxide (TiO2) and Zinc Oxide (ZnO), were classified as inert particles, therefore, they are pointed out as the best way to protect the skin against the harmful effects of ultraviolet radiation (UV). However, recent studies suggest that these particles have several stability problems that may lead to a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/01/2012
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45. Nitrogen removal from swine wastewater by combining treated effluent with raw manure
Effluents from swine raising can be harmful to the environment if not correctly managed. Nitrogen (N) is usually the main element present at high concentrations in the effluent. Since the use as biofertilizer is not always a feasible alternative, the treatment of swine wastewater is necessary. Variations in N species and water solubility make the treatment d
Sci. agric. (Piracicaba, Braz.). Publicado em: 2012-12
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46. Preparation, characterization and in vitro antimicrobial activity of liposomal ceftazidime and cefepime against Pseudomonas aeruginosa strains
Pseudomonas aeruginosa is an opportunistic microorganism with the ability to respond to a wide variety of environmental changes, exhibiting a high intrinsic resistance to a number of antimicrobial agents. This low susceptibility to antimicrobial substances is primarily due to the low permeability of its outer membrane, efflux mechanisms and the synthesis of
Braz. J. Microbiol.. Publicado em: 2012-09
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47. Protection against neurotoxicity by an autophagic mechanism
The objective of the present study was to investigate the effects of 3-n-butylphthalide (NBP) on a 1-methyl-4-phenylpyridinium (MPP+)-induced cellular model of Parkinson’s disease (PD) and to illustrate the potential mechanism of autophagy in this process. For this purpose, rat PC12 pheochromocytoma cells were treated with MPP+ (1 mM) for 24 h following pr
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-05
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48. Potential of wet blue leather waste for ruminant feeding
The objective of this study was to find an alternative to minimize environmental contamination by leather waste using it as ruminant feed. The wet blue leather wastes (WB) without chrome extraction were compared with the leather wastes in which the chrome was extracted (CE). Both materials had 99.7% of dry matter (DM), but the crude protein level was higher
Revista Brasileira de Zootecnia. Publicado em: 2012-04