Micro-inverter for integrated grid-tie photovoltaic module using resonant controller

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Stress distribution on dentin-cement-post interface varying root canal and glass fiber post diameters. A three-dimensional finite element analysis based on micro-C data

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Síntese de nanocatalisador cerâmico a base de SnO2 pelo método hidrotermal assistido por micro-ondas aplicado a reação de transesterificação do óleo de babaçu

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Phylogeny and micro-habitats utilized by lizards determine the composition of their endoparasites in the semiarid Caatinga of Northeast Brazil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

The physicochemical characterization and in vivo response of micro/nanoporous bioactive ceramic particulate bone graft materials

In this study, the physicochemical characteristics of calcium phosphate based bioactive ceramics of different compositions and blends presenting similar micro/nanoporosity and micrometer scale surface texture were characterized and evaluated in an in vivo model. Prior to the animal experiment, the porosity, surface area, particle size distribution, phase quantification, and dissolution of the materials tested were evaluated. The bone regenerative properties of the materials were evaluated using a rabbit calvaria model. After 2, 4, and 8 weeks, the animals were sacrificed and all samples were subjected to histologic observation and histomorphometric analysis. The material characterization showed that all materials tested presented variation in particle size, porosity and composition with different degrees of HA/TCP/lower stoichiometry phase ratios. Histologically, the calvarial defects presented temporal bone filling suggesting that all material groups were biocompatible and osteoconductive. Among the different materials tested, there were significant differences found in the amount of bone formation as a function of time. At 8 weeks, the micro/nanoporous material presenting similar to 55,TCP:45%,HA composition ratio presented higher amounts of new bone regeneration relative to other blends and a decrease in the amount of soft tissue infiltration. (C) 2014 Elsevier B.V. All rights reserved.

Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Micro-fungos de interesse para o setor de petróleo, gás e biocombustíveis

Oil is a hydrocarbon mixture of various sizes, including saturated and aromatic compounds. Natural gas is a mixture of gaseous hydrocarbons and its main component is methane. In our society, the great demand for these fuels requires fast extraction, transportation and refining, increasing the number of accidents that compromise the environment. Oil is a finite resource and it is necessary to reduce the problems related to the question concerning environmental pollution which has encouraged the search for alternative fuel sources in our country. So today we have two major biofuels: ethanol and biodiesel. Concurrently, many studies have been done directed toward the isolation of microorganisms capable of degrading petrochemical industrial wastes, most of them using as a source of isolation soil and water collected in a contaminated environment. Isolation from alternative substrates has emerged as a new strategy that has provided satisfactory results. In this work, we present the leaf-cutter ants of the Attini tribe as a source for the isolation of micro-fungi with the potential for hydrocarbon degradation. These insects have a social way of life and a highly specialized system of intra and interspecific communication, which is based on the recognition of individuals through volatile chemical compounds, the majority hydrocarbons, stored in their exoskeleton. The micro-environment exoskeleton of Attini ants (genus Atta) used in this work proved to be a rich source of microbial biodiversity, as other studies have found. The flotation isolation technique applied here allowed the achievement of 214 micro-fungi, 118 representatives of the dematiaceous fungi group and 96 hyaline filamentous fungi. They were submitted to toluene degradation tests and at least one strain of each genus presented good results, namely Teratosphaeria, Exophiala, Cladosporium, Penicillium, Aspergillus... (Complete abstract click electronic access below)

Intervenção urbanística de micro escala: uma alternativa de transformação do espaço urbano na zona leste de Presidente Prudente

Não disponível

A comunicação interna como fator de inovação nas Micro e Pequenas Empresas

The work presents a literature review on the topic of internal communication as an innovation factor in Micro and Small Business. The objective is to discuss how internal communication can be an essential factor in the pursuit of innovation and the consequent competitive advantage in the Micro and Small Enterprises scenario. We present the concepts of integrated communication, organizational communication, internal communication, whether crafted by a philosophy of Public Relations, can lead these companies to gain competitive advantage and overcome the limitations and challenges imposed on them

Seleção de micro-organismos com potencial de biodegradação de hidrocarbonetos e biodiesel

The oil and biodiesel are oily substances which, if spilled or thrown out in the environment, can cause serious damages. In this context, bioremediation techniques can be used to the recovering of sites degradated by mineral or vegetable oil, besides them, the biodegradation. However, it is necessary that there are microorganism strains used to degradate the contaminant, previously selected for the fast, efficient and minimum impact remediation. The main objective of this study was to isolate microorganism strains coming from different ecological recesses and verify their potentiality on biodegradating oil and biodiesel. Strains of bacteria, fungi and yeasts were isolated from soils contaminated by hydrocarbons (diesel, gasoline, grease) before, by doing striations on culture plates. On the biodegradation tests, it was used the redox indicator, 2,6-dichlorophenol indophenol (DCPIP), then, after the indicador’s discoloration, the absorbance of the suspension obtained was measured. 46 different microorganism strains were isolated, and the oil, when it was used as a carbon resource, it was degradate easier than the biodiesel. The experiments showed that, in a period, the site impacted by oil spills recovers itself by the biodegradation, in aerobic conditions, by the redox activity.

Aplicação e viabilidade de micro-organisos potencialmente probióticos em embutido cárneo fermentado

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Propriedades físico-químicas e mecânicas, potencial bioativo e caracterização da interface dentina-cimento de cimentos endodônticos experimentais à base de cimento Portland associados à radiopacificadores micro e nanoparticulados

Pós-graduação em Odontologia - FOAR

Freezing Distortions and Photoluminescence Property in PbMoO4 Micro Octahedrons: An Experimental and Theoretical Study

In this paper, we report a detailed structural and electronic characterization of PbMoO4 crystals by using a conventional hydrothermal (CH) method. The samples were characterized by X-ray diffraction (XRD), Fourier transform Raman (FT-Raman), field-emission gun scanning electron microscopy (FEG-SEM) and photoluminescence (PL) measurements. In addition, first-principles quantum mechanical calculations based on the density functional theory were employed in order to understand the band structure and density of states for the PbMoO4. Analysis of both theoretical and experimental results allows to rationalize the role of order-disorder effects in the observed green PL emissions in these ordered powders.

Citrus greening disease investigation using micro synchrotron radiation X-ray fluorescence in association with soft independent modelling of class analogy (SIMCA)

This study describes the use of micro synchrotron radiation X-ray fluorescence (µSR-XRF) to investigate citrus greening disease in sweet orange (Citrus sinensis) plants. An experiment using healthy plants as control and plants of the same variety infected with Candidatus Liberibacter asiaticus (CLas) was performed to verify variations of the mineral composition of citrus leaves. A µSR-XRF system using the D09B X-ray fluorescence beam line at the Brazilian Synchrotron Light Source (LNLS, Campinas, São Paulo State) was employed for this purpose. The data were analyzed using a chemometric tool called soft independent modelling of class analogy (SIMCA). The promising results from SIMCA models reinforce the evidence that plants infected by citrus greening (both asymptomatic and symptomatic) undergo alterations in their micro- and macronutrient compositions.