Encontrados 21 documentos, a visualizar página 1 de 3
Rheological characterization of κ-carrageenan/galactomannan and xanthan/galacto...
Pinheiro, A. C.; Bourbon, A. I.; Rocha, Cristina; Ribeiro, Clara; Maia, J. M.; Gonçalves, M. P.; Teixeira, J. A.; Vicente, A. A.The synergistic interactions of two non-conventional galactomannans (Gleditsia triacanthos galactomannan (mannose/galactose ratio [M/G] = 2.82) and Sophora japonica galactomannan (M/G = 5.75)) with κ-carrageenan and xanthan were quantified and compared with those of two traditional galactomannans (guar gum—M/G= 1.8 and locust bean gum—M/G= 3.5) with the same polysaccharides. The main objective was to evaluate t...
Effect of guar gum on the physicochemical, thermal, rheological and textural pr...
Oliveira, N. M.; Dourado, Fernando; Peres, A. M.; Silva, M. V.; Maia, J. M.; Teixeira, J. A.In attempts to produce a low-fat cheese with a rheology and texture similar to that of a full-fat cheese, guar gum (within 0.0025–0.01%; w/v, final concentration) was added to low-fat milk. The obtained cheeses were characterised regarding their physicochemical, thermal, rheological and textural properties. Control cheeses were also produced with low and full-fat milk. The physicochemical properties of the guar...
Characterization of dextrin-based hydrogels : rheology, biocompatibility, and d...
Carvalho, Joana; Moreira, Susana; Maia, J. M.; Gama, F. M.A new class of degradable dextrin-based hydrogels (dextrin-HEMA) was developed. The hydroxyethyl methacrylate ester (HEMA) hydroxyl groups were activated with N,N' carbonyldiimidazole (CDI), followed by their coupling to dextrin, yielding a derivatized material that can be polymerized in aqueous solution to form hydrogels. A comparative study of the stability of the dextrin-HEMA hydrogels and dextrin-vinyl acry...
Characterization of galactomannans extracted from seeds of Gleditsia triacantho...
Bourbon, A. I.; Pinheiro, A. C.; Ribeiro, Clara; Miranda, Cândida; Maia, J. M.; Teixeira, J. A.; Vicente, A. A.The rheological behaviour, under steady and dynamic shear and extensional conditions, of two nonconventional galactomannans isolated from Gleditsia triacanthos and Sophora japonica is determined and compared to those of locust bean gum and guar gum. The studied galactomannans exhibit shear-thinning behaviour in the range of concentrations and shear rates evaluated. For similar concentrations and shear rates, th...
Comparative studies of MSGC and GEM for photon and electron detection at ambien...
Mir, J. A.; Conceição, A. S.; Maia, J. M.; Veloso, J. F. C. A.; Santos, J. M. F. doshttp://www.sciencedirect.com/science/article/B6TJM-4TN0KR6-4/2/96e0a99e3367107c66c9d9bbccd7e9db
A concise review on THGEM detectors
Breskin, A.; Alon, R.; Cortesi, M.; Chechik, R.; Miyamoto, J.; Dangendorf, V.; Maia, J. M.; Santos, J. M. F. doshttp://www.sciencedirect.com/science/article/B6TJM-4T8JX8Y-1/2/691894558a313c30f6e8cdb7cf598b67
Method for automatic detection of wheezing in lung sounds
Riella,R.J.; Nohama,P.; Maia,J.M.The present report describes the development of a technique for automatic wheezing recognition in digitally recorded lung sounds. This method is based on the extraction and processing of spectral information from the respiratory cycle and the use of these data for user feedback and automatic recognition. The respiratory cycle is first pre-processed, in order to normalize its spectral information, and its spectr...
Micro-hole and strip plate-based photosensor
Freitas, E. D. C.; Veloso, J. F. C. A.; Breskin, A.; Chechik, R.; Amaro, F. D.; Ferreira, L. F. Requicha; Maia, J. M.; Santos, J. M. F. dosThe performance of a new VUV photosensor, based on an micro-hole and strip plate (MHSP) electron multiplier with a CsI photocathode deposited on its top electrode, is described. This photosensor presents gains above 104 when operating in an Ar-5%Xe gas mixture at 1 atm. Although the gain of a single MHSP is not sufficient for efficient detection of single photons, this simple UV photosensor may be useful for th...
Single-UV-photon 2-D imaging with multi-GEM detectors
Maia, J. M.; Mörmann, D.; Breskin, A.; Chechik, R.; Veloso, J. F. C. A.; Santos, J. M. F. dosThe main goal being the construction of large-area, low-cost position-sensitive micropattern gaseous photomultipliers (GPMs) based on gas electron multipliers (GEM) cascades, we have studied the single-photon imaging capabilities of a 4-GEM GPM with a reflective CsI-photocathode deposited on the top surface of the 1st GEM. The charge readout was performed with a simple/economic Wedge and Strip (W&S) readout ele...
Avaliação do comportamento reológico de betume modificado com borracha de pneus...
Arieira, Susana; Maia, J. M.; Pais, Jorge C.; Fonseca, PauloA crescente utilização de betume modificado com borracha reciclada de pneus usados (BMB) em misturas betuminosas a quente para a reabilitação de pavimentos leva a que se procure conhecer melhor as suas características e o seu comportamento de modo a potenciar a sua utilização. Actualmente, tendo em conta a utilização corrente do BMB, a sua caracterização é realizada principalmente avaliando-se as suas propried...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||