Efeito de desinfecções sucessivas com energia de microondas na resistência de união entre dentes artificiais e resinas para bases de próteses

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Presença de Salmonella spp. na cadeia produtiva da carne bovina: estudo das fonte de contaminação para novilhos criados sob confinamento experimental

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

Destilação fracionada do óleo essencial de P. aduncum L. rico em dilapiol

A espécie Piper aduncum L. é uma planta de porte arbustivo, popularmente conhecida na região amazônica como pimenta-de-macaco. Dela, pode ser extraído um óleo essencial, rico em dilapiol, de grande interesse econômico pela sua ação inseticida e combate às pragas na agricultura. Esse bioinseticida surge como alternativa para substituir os inseticidas sintéticos, pois sendo de origem natural não causam danos ao meio ambiente e à saúde do homem. Neste trabalho, foram analisadas as propriedades físicas do óleo essencial de pimenta-de-macaco, obtido por destilação por arraste com vapor que apresentou valores médios do índice de refração igual a 1,516 e massa específica igual a 1,08 g/cm³. Estudou-se o processo de destilação fracionada do óleo essencial, visando concentrar o composto de interesse agregando maior valor econômico, o que viabiliza seu emprego na produção de novos produtos. Nesse processo o composto principal é obtido com elevado grau de pureza. Avaliou-se um modelo matemático para a concentração de dilapiol no fundo do balão de destilação, via análise de regressão, em função do tempo de operação, o qual ajustou muito bem os dados experimentais. A análise dos resultados permite afirmar que o processo de destilação fracionada pode ser empregado para separar os constituintes úteis de óleos essenciais. Isso só é possível, pois os óleos essenciais são constituídos por vários compostos orgânicos voláteis de pontos de ebulição e pressões de vapor diferentes, tornando a separação viável. O maior teor de dilapiol obtido experimentalmente pelo processo de destilação fracionada a vácuo foi de 95 %, operando-se nas condições de vácuo (40 mmHg) e temperatura média da coluna de 122 ºC, obtendo-se um rendimento médio do processo de 41 % (v/v).

Avaliação do pH, da liberação de íons cálcio e da adesividade de cimentos endodônticos contendo hidróxido de cálcio ou à base de MTA

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Esterilização de fresas carbide em fornos de micro-ondas domésticos. Efeito da capacidade. da potência, do meio da imersão, da quantidade e posição da amostra sobre o tempo de esposição

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito do tratamento térmico em microondas e do tempo de armazenamento em água sobre a citotoxicidade de resinas acrílicas para base e reembasamento de próteses

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Avaliação do desempenho de colírio usando soro alogênico e fatores de crescimento derivados de plaquetas em cultura de células do anel córneo-escleral

Pós-graduação em Pesquisa e Desenvolvimento (Biotecnologia Médica) - FMB

Análise dos processos de infiltração, percolação, retenção e evaporação em solos arenoso e residuais utilizando lisímetro

The mobility of water in the soil is a difficult process to be quantified. During precipitation, there is a portion of the water that infiltrates, which is very important for recovering the groundwater balance. This work studies the mobility of water in sandy soils with different textures and residual soils through experiments mounted in lysimeters. The lysimeters were mounted on acrylic cylinder with 11.3 cm diameter and 25.0 cm in length. The sand was deposited using the process sand rain. In the tests it was maintained a hydraulic head of two centimeters above the surface with the aid of a Mariotte flask. The portions of water were controlled in the experiments using relations between weight and volume measurements over time. The data were obtained by monitoring the input and output volumes of water through calibrated reservoir and system weight by an electronic balance. The infiltration front was monitored with the aid of a digital camera. The results indicate that the smaller the particle size of the sand, the lower the speed of the saturation front, the higher the retained volume, the smaller the basic rate of infiltration and the lowest speed of percolation. Moreover, the rate of water loss in the evaporation process indicated no significant difference with variation of the particle size of the samples

Comportamento de oviposição em Chrysomya megacephala (F.) (Diptera: Calliphoridae): distinção quantitativa frente a posturas prévias?

Chrysomya megacephala (Fabricius), has considerable medical, veterinary and forensic importance. In insects in general, the ability to track the food substrate is due to highly sensitive organs adapted for detecting odors, particularly in the case of blowflies, which is one of carcass main consumers. Eggs of blowflies are usually aggregated in function of the behavior of other pheromone mediated by females laying eggs in place on the same substrate. One of the main reasons for studying oviposition behavior is because it may indirectly affect individual qualification, population dynamics and community structure. It has been suggested that female blowflies can evaluate the number of eggs on a substrate, decreasing the size of oviposition in very saturated substrates with larvae or eggs leading to a lower intraspecific competition. The present study investigated the oviposition behavior of females of C. megacephala, and wished to consider whether they are able to distinguish quantitatively (size of the mass) eggs previously put into a place of posture and hence indicate whether there is a limit beneficial (to avoid competition among larvae) for its oviposition on the same substrate or if that place would already be saturated, requiring find another substrate without eggs or less for futures ovipositions. With 20 females and five males, five treatments were applied, repeated ten times and analyzed using the Mann-Whitney test. Each treatment consists in placing, inside the cage, a flask with 50g of ground beef and another one in the other side, with the same amount of substrate with a certain amount of prior oviposition for a period of 5 hours. The masses prior eggs were used 0.03 g, 0.05 g, 0.1 g, 0.2 g and 0.3 g (respectively, T1, T2, T3, T4 and T5). The other part of the work consisted in the use of a “Y” olfactometer, a device used to determine the choice of an invertebrate against... (Complete abstract click electronic access below)

Effectof inoculum in the emulsification index of biossufactants produced by Bacillus velezensis using wheat bran as substrate in solid-state fermentation

Conselho Nacional de Desenvolvimento em Pesquisa (CNPq)

Evaluation of the pre-inoculum utilization in biosurfactant production by solid-state fermentation

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Cassava wastewater as carbon source for the polyhydroxybutyrate production by Azotobacter vinelandii CCT 2841

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Moderating effect of ammonia on particle growth and stability of quasi-monodisperse silver nanoparticles synthesized by the Turkevich method

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

Interference of the assessment method in pH values of an epoxy-based cement

Introduction: Alkalinization potential is a fundamental property of endodontic epoxy-based cements containing calcium hydroxide. Studies have shown discrepant pH results for same materials at different evaluation periods. A possible reason accounting for these differences may be the assessment procedures. Objective: To evaluate the pH value of an epoxy-based cement (Sealer 26) in different periods of analysis, using two assessment methods. Material and methods: Sealer 26 was manipulated and immediately placed into polyethylene tubes (n=10, each group) and immersed in distilled water. In G1, the tubes were kept in the same water during all experiment; and in G2, the tubes were removed and placed into another flask with an equal amount of water after the pH evaluation. The pH of these solutions was measured at 24 hours, 7, 14 and 28 days. Analysis were made within the same group according to the experimental periods and between groups in each experimental period. Data were submitted to ANOVA (α = 5%) and t test, respectively. Results: For G1 and G2, all periods showed different pH values (p < 0.05), except between 14 and 28 days (p > 0.05) and between 7 and 14 days (p > 0.05), respectively. In each period, no significant differences were observed between the groups. Conclusion: The method to obtain the pH values in different experimental periods no interfered in the final results. However, difference was observed when the results were analyzed at same group.

Approach toward an efficient inoculum preparation stage for suspension BHK-21 cell culture

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