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Hábitos de estudo e estilos de aprendizagem no ensino público e privado univers...

O objectivo deste artigo é examinar os hábitos de estudo e os estilos de aprendizagem entre os alunos do primeiro ano que frequentam universidades públicas e compará-los com os que frequentam universidades privadas, tendo em vista identificar os atributos desses estudantes que podem influenciar a adopção de um ou outro estilo. A compreensão destas diferenças por parte dos professores permite uma maior probabili...

Comportamento de pilares de betão armado sujeitos a ações monotónicas e cíclicas

Para a avaliação da resposta de estruturas de edifícios de betão armado sujeitas à ação sísmica é importante definir um conjunto de parâmetros característicos do comportamento local dos elementos de betão armado, nomeadamente o deslocamento de cedência e o deslocamento último. Nas últimas décadas foram dados importantes passos na caracterização do comportamento cíclico de pilares de betão armado, mas persistem ...

Ethanol production from xylose by Pichia stipitis NRRL Y-7124 in a stirred tank...

The ethanol production by Pichia stipitis was evaluated in a stirred tank bioreactor using semi-defined medium containing xylose (90.0 g/l) as the main carbon source. Experimental assays were performed according to a 2² full factorial design to evaluate the influence of aeration (0.25 to 0.75 vvm) and agitation (150 to 250 rpm) conditions on ethanol production. In the studied range of values, the agitation incr...

Ethanol production from xylose by pichia stipitis NRRL Y-7124 in a stirred tank...

The ethanol production by Pichia stipitis was evaluated in a stirred tank bioreactor using semidefined medium containing xylose (90.0 g/l) as the main carbon source. Experimental assays were performed according to a 22 full factorial design to evaluate the influence of aeration (0.25 to 0.75 vvm) and agitation (150 to 250 rpm) conditions on ethanol production. In the studied range of values, the agitation incre...

Phase behavior and structural characterization of DODAB:MO lipid mixtures for d...

RICI4 - Book of Abstracts

Monoolein-based lipoplexes (DODAB/MO/DNA) as non-viral vector for transfection-...

Cationic liposomes/DNA (lipoplexes) have been widely used as non-viral vectors for transfection, the role of the neutral lipid in liposome formulation being determinant for the efficiency of this process [1,2]. In this work, we studied the potential of monoolein (MO) as helper lipid for cellular transfection. Lipoplexes composed of pDNA and dioctadecyldimethylammonium bromide (DODAB)/1-monooleoyl-rac-glycerol (...

Influence of L-cysteine, oxygen and relative humidity upon survival throughout ...

The survival rates of Lactobacilus acidophilus Ki, Lactobacillus paracasei L26 and Bifidobacterium animalis BB-12 were studied after whey protein microencapsulation via spray-drying, with or without L-cysteine- HCl, and storage up to 6 months at 5 C and 22 C, with variation in relative air humidity and oxygen levels. Lb. paracasei L26 was the least susceptible to storage conditions: above 106 cfu g 1 were rec...

Increased expression of tissue factor and protease-activated receptor-1 does no...

A correlation between cancer and hypercoagulability has been described for more than a century. Patients with cancer are at increased risk for thrombotic complications and the clotting initiator protein, tissue factor (TF), is possibly involved in this process. Moreover, TF may promote angiogenesis and tumor growth. In addition to TF, thrombin seems to play a relevant role in tumor biology, mainly through activ...

DODAB/Monoolein mixed cationic liposomes for gene delivery : investigation by D...

A novel approach for the production of DODAB:MO lipoplexes : the influence of t...

Cationic liposomes/ DNA complexes (lipoplexes) have been widely used as nano-carriers for animal cell transfection, with the neutral lipid (helper) playing a determinant role for the efficiency of this process due to the formation of non-lammellar intermediates that are akin to membrane fusion process [1]. We have developed a novel formulation containing the cationic agent dioctadecyldimethylammonium bromide (D...