Development of new biomaterials based on liquid crystalline phases of cellulose derivatives

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do Grau de Mestre em Engenharia Biomédica

The development of a knowledge-based society - Challenges for e-learning and adult students in higher education

This chapter appears in Encyclopaedia of Distance Learning 2nd Edition edit by Rogers, P.; Berg, Gary; Boettecher, Judith V.; Howard, Caroline; Justice, Lorraine; Schenk, Karen D.. Copyright 2009, IGI Global, www.igi-global.com. Posted by permission of the publisher. URL: http://www.igi-global.com/reference/ details.asp?ID=9703&v=tableOfContents

Development of thermoresponsive (polysulfone/polyacrylonitrile) - based membranes for bioseparation processes

Mestrado integrado em Engenharia Química e Bioquímica

The transport of carboxylic acids and important role of the Jen1p transporter during the development of yeast colonies

On solid substrates, yeast colonies pass through distinct developmental phases characterized by the changes in pH of their surroundings from acidic to nearly alkaline and vice versa. At the beginning of the alkali phase colonies start to produce ammonia, which functions as a quorum-sensing molecule inducing the reprogramming of cell metabolism. Such reprogramming includes, among others, the activation of several plasma membrane transporters and is connected with colony differentiation. In the present study, we show that colony cells can use two transport mechanisms to import lactic acid: a ‘saturable’ component of the transport, which requires the presence of a functional Jen1p transporter, and a ‘non-saturable’ component (diffusion) that is independent of Jen1p. During colony development, the efficiency of both transport components changes similarly in central and outer colonial cells. Although the lactate uptake capacity of central cells gradually decreases during colony development, the lactate uptake capacity of outer cells peaks during the alkali phase and is also kept relatively high in the second acidic phase. This lactate uptake profile correlates with the localization of the Jen1p transporter to the plasma membrane of colony cells. Both lactic acid uptake mechanisms are diminished in sok2 colonies where JEN1 expression is decreased. The Sok2p transcription factor may therefore be involved in the regulation of non-saturable lactic acid uptake in yeast colonies.

Development of new methodologies in sample treatment for proteomics workflow based on enzymatic probe sonication technology and mass spectrometry

Thesis submitted to the Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia, for the degree of Doctor of Philosophy in Biochemistry

Development of 2-oxazoline-based hydrogels and porous polyester microparticles in scCO2

Thesis submitted to Faculdade de Ciências e Tecnologia from Universidade Nova de Lisboa in partial fulfillment of the requirements for the obtention of the degree of Master of Science in Biotechnology

Development of cyclodextrin-hydrogel polymeric systems in scCO2 for drug delivery

Thesis for the Degree of Master of Science in Bioorganic Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia

“Culture Stops Development!”: Bijagó Youth and the Appropriation of Developmentalist Discourse in Guinea-B

African Studies Review, Volume 52, Number 2, pp. 69–

Dor crónica lombar : incapacidade auto-reportada em trabalhadores das IPSS de Arronches e sua relação com factores psicossociais e intensidade da dor

RESUMO: Vários estudos realizados sugerem que os factores psicossociais (nível de satisfação laboral; nível educacional; a catastrofização da dor e crenças de medoevitamento)têm um importante papel como factores associados ao desenvolvimento de cronicidade da DL (Krismer & van Tulder, 2007; Kwon et al., 2006; Leclerc et al., 2009; Pincus, Santos, Breen, Burton e Underwood., 2008.) Objectivo: Analisar a associação entre as variáveis catastrofização da dor, crenças de medo-evitamento da dor e intensidade da dor com a incapacidade funcional auto-reportada, numa amostra de indivíduos com DCL. Metodologia: A população alvo foi constituída por 160 funcionários da Santa Casa da Misericórdia e Centro de Bem Estar Social de Arronches. Integraram a amostra 133 funcionários que se disponibilizaram a responder aos diferentes instrumentos de avaliação utilizados (“Roland–Morris Disability Questionnaire”(RMQ); “ Questionário de Caracterização e Levantamento de Factores de Risco e Impacto associado à DCL”; “Pain Catastrophing Scale” (PCS) e o “Fear- Avoidance Beliefs Questionnaire” (FABQ). A recolha de dados realizou-se entre Agosto e Novembro de 2010. Resultados: Neste estudo, verificou-se que 39,1 % dos indivíduos referiam DCL não específica. Relativamente à incapacidade funcional autoreportada, obteve-se um score médio 5,87 no RMQ. Obteve-se um valor de rs=0,425,p<0,01, para a associação entre a catastrofização da dor e incapacidade. Relativamente à associação entre crenças de medo-evitamento, sub-escala actividade física e incapacidade, foi obtido o valor de rs= 0,074 e para a associação entre as crenças de medo-evitamento, sub-escala trabalho e incapacidade, verificou-se rs=0,422, p<0,01. No que respeita à associação entre percepção da intensidade dor actual e a incapacidade, obteve-se um valor rs= 0,177 e a associação entre a dor percepcionada em 2009 e incapacidade, aferiu um resultado de rs=0,291, p<0,05. Conclusão: Concluímos que existe uma associação moderada entre catastrofização da dor e a incapacidade funcional auto-reportada, e também entre crenças de medo-evitamento relativamente ao trabalho e a incapacidade funcional auto-reportada. Relativamente à associação entre a dor percepcionada em 2009 e a incapacidade funcional auto-reportada a associação é baixa. Não sendo encontrada associação entre crenças de medo-evitamento relativamente à actividade física e a incapacidade funcional auto-reportada, nem para a associação entre percepção da intensidade da dor actual e a incapacidade. Esta pesquisa contribuiu assim, para dar a conhecer factores relevantes avaliar em indivíduos com DCL, podendo a sua modificação contribuir para a prevenir maiores níveis de incapacidade funcional ou melhorar a efectividade do tratamento utilizado. --------------------ABSTRACT: Several studies suggest that psychosocial factors (level of job satisfaction, education level, and the pain catastrophizing and fear-avoidance beliefs) have an important role as factors associated with development of chronicity LBP (Krisma & van Tulder, 2007 ; Kwon et al., 2006, Leclerc et al. 2009; Pincus, Santos, Breen, Burton and Underwood., 2008.) Objective: To assess the association between the variables of pain catastrophizing, fear-avoidance beliefs, pain, intensity pain and self-reported functional disability in a sample of people with chronic LBP. Methodology: The study consisted of 160 employees of the Santa Casa da Misericórdia and Centro de Bem Estar Social of Arronches. Integrated sample of 133 employees who agreed to respond to different assessment tools used (Roland-Morris Disability Questionnaire (RMQ), "Questionnaire Survey of Characterization and Risk Factors and Impact associated with the DCL," "Pain Catastrophing Scale(PCS) and "Fear-Avoidance Beliefs Questionnaire (FABQ). Data collection took place between August and November 2010. Results: In this study, it was found that 39.1% of subjects reported no specific chronic LBP. For the self-reported functional disability, we obtained a medium score of 5.87 on the RMQ. We obtained a value of rs = 0.425, p <0.01, for the association between catastrophizing in pain and disability. Regarding the association between fear-avoidance beliefs, sub-scale physical activity and disability, was obtained a value of rs = 0.074 and for the association between fear-avoidance beliefs, sub-scale work and disability, there was rs = 0.422, p <0.01. Regarding the association between perceived pain intensity and pain disability present we obtained a value rs = 0.177 association between pain and perceived disability in 2009 and measured an outcome of rs = 0.291, p <0.05.Conclusion: That there is a moderate association between catastrophizing and pain self-reported functional disability, and also between fear-avoidance beliefs in relation to employment and self-reported functional disability. Regarding the association between pain and perceived disability in 2009 self-reported the association is low. Not being an association between earavoidance beliefs for physical activity and self-reported functional disability, or for the association between perception of current pain intensity and disability. This research contributed so, to disclose relevant factors evaluate in individuals with chronic LBP, its modification may help to prevent higher levels of functional disability or improve the effectiveness of treatment used.

Development of a piezoelectric biosensor based on PVDF films

Dissertação para obtenção do Grau de Mestre em Engenharia Química e Bioquímica

Development of electrospun Ion jelly fibers® for drug delivery

Dissertação para obtenção do Grau de Mestre em Biotecnologia

Gold nanoparticle to antibody conjugates for diagnosis applications: molecular interactions and immunoassay development

Thesis for the Master degree in Structural and Functional Biochemistry

Development of molecularly imprinted polymers using supercritical fluid technology

Dissertação para obtenção do Grau de Doutor em Química Sustentável

Dissecting neuronal development deficits by inflammation: from morphology to cytoskeleton dynamics

Dissertação para obtenção do Grau de Mestre em Genética Molecular e Biomedicina