Caracterização de extratos de cajá-manga (Spondias dulcis Parkinson) potencialmente ativos e seguros para obtenção de fitocosmético antioxidante

Pós-graduação em Ciências Farmacêuticas - FCFAR

Avaliação do desempenho zootécnico, da função da mucosa intestinal e da microbiota ileal quando da substituição do milho pelo sorgo na ração de frangos de corte

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Compostos luminescentes em matrizes macroporosas de sílica obtidas por tratamento hidrotérmico a partir de vidro pyrex

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

Desenvolvimento de biodiesel microemulsionado com reaproveitamento de resíduos de óleos vegetais

Pós-graduação em Engenharia Mecânica - FEG

Desenvolvimento e caracterização de sistemas líquido-cristalinos para aplicação tópica de metotrexato: estudos de liberação, retenção e permeação in vitro

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização da pulverização de mistura de tanque com diferentes pontas de jato plano

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Desenvolvimento de uma metodologia numérica para escoamentos viscoelásticos não-isotérmicos

Pós-graduação em Matematica Aplicada e Computacional - FCT

Estudo das características térmicas e mecânicas de formulações de adesivos PSA HOT MELT contendo variações de borrachas SBC e resinas taquificantes

The properties of the hot melt adhesive pressure sensitive (HMPSA) using an elastomer as a base polymer a copolymer of styrene and butadiene (SBS) and variation of tackifiers resins such as hydrocarbon resins and hydrogenated hydrocarbon were investigated. The formulations were prepared by mixing process within shear. The adhesives prepared were evaluated in test Brookfield viscosity and softening point Ring and Ball to compare the formulations and the influence of variations in raw materials. Infrared analyzes were performed to detect the reactions between the inputs and investigate the chemical interactions of the same properties of the adhesive. In thermal analysis, the assay was performed thermogravimetry (TG) and diferencial exploratory calorimetry (DSC). Were investigated the parameters of the tensile test on each of the formulations. Finally, were analysed comparatively the basic formulations of adhesives with their respective raw materials

Avaliação do efeito da temperatura na deslignificação com o oxigênio nas propriedades do papel

The deslignification with oxygen, also denominated pre-O2, consists in a whitening stage, which consists of accomplishing an oxidation of the lignin, and remove it with the alkali, providing a larger earnings in the bleaching of the pulp. The pre-O2 is a process already very established, where a significant part of the cellulose of whitened short fiber produced nowadays suffers deslignification for this method. The conditions of work of this stage contemplate directly in the results of the deslignification level, in the physical, optical and mechanics properties of the pulp, and consequently of the paper, because this is important to know their effects fully. The main variables related to the control of this process are respectively: pressure and oxygen load, alkaline load, consistence, time and temperature, being this last variable was the study focus in this work. The objective of the work was to analyze the effect of the variation of the temperature in the oxygen whitening along every bleaching process of the pulp, refine and in the optical, physics and mechanics properties of the paper. The development of the work was based in four temperature levels (90, 95, 100 and 105°C) combined to two whitening sequences (OD0(E+P)D1P and OAHTD0(E+P)D1P). The results obtained in the oxygen deslignification stage indicated that the elevation of the temperature contemplated in increases of the whiteness, deslignification efficiency and in the viscosity loss allied to the reduction of the selectivity of the process. In the remaining of the whitening, the sequence that included the acid hydrolysis presented values slightly inferior of whiteness, kappa number, viscosity and yield in relation to the other sequence when compared with the samples of same temperatures. Already the physical tests showed that the sequence with acid stage amplifies the values of capillary... (Complete abstract click electronic access below)

Flexão e análise dinâmico-mecânica de compósitos 5HS e NCF com resina epóxi monocomponente produzidos por RTM

In order to study resin distribution and homogeneity of composite laminates manufactured by RTM, it was used CYCOM 890 monolithic toughened epoxy as a matrix with two different configurations of intermediated modulus (IM) carbon fibers: Satin Weave (5HS) and non crimp fabric (NCF). The injection parameters were defined based on Thermo Gravimetric Analysis (TG), Differential Scanning Calorimetry (DSC) and rheological analysis. After processing the material, the resin/fiber impregnation was studied using ultrasonic test, Thermo Gravimetric Analysis, Differential Scanning Calorimetry, Dynamic Mechanical Analysis (DMA) and flexural tests. Therefore, it was able to observe an internal residual stress during the cooling process in both laminates, higher in the composite using NCF fabric due to the lack of symmetry, although a good proportion of fiber/matrix has been verified by the lower values of flexural modulus deviation. The DMA enabled the visualization of glass transition and its association with the inter and intra molecular interaction and movement, in which the NCF composite presented better permeability due to the lowest temperature of glass transition, when compared to the Satin Weave composite

Efeito do tipo de adesivo e do seu mecanismo de ativação, assim como da viscosidade da resina composta, na resistência de união à dentina antes e após envelhecimento artificial

Pós-graduação em Odontologia Restauradora - ICT

Microencapsulação por gelificação iônica e interação eletrostática do corante de buriti (Mauritia flexuosa L. f.)

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

Oil-in-water biocompatible microemulsion as a carrier for the antitumor drug compound methyl dihydrojasmonate

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Development of Cutaneous Bioadhesive Ureasil-Polyether Hybrid Films

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

Influence of the Hall effect on convection in plasmas

The influence of the Hall effect on stationary convection in shearless current-carrying plasma columns is considered. It is shown that the Hall effect can inhibit the formation of convection cells generated by viscosity and resistivity.