18 documents found, page 1 of 2
Nanotechnology-based sunscreens - a review
Paiva-Santos, Ana Cláudia; Marto, Joana; Chá-Chá, R.; Martins, Ana M.; Pereira-Silva, M.; Ribeiro, Helena; Veiga, F.The daily use of sun protection is essential to prevent the damaging effect of incident solar ultraviolet (UV) radiation. Sunscreens are cosmetic products containing UV filters as active compounds, which are responsible for the absorption and/or reflection of UV radiation that might otherwise reach the skin surface. Sunscreen formulation has undergone a major technological transformation over the recent past, r...
Melanin nanoparticles as a promising tool for biomedical applications – a review
Caldas, M.; Santos, A. C.; Rebelo, R.; Veiga, F.; Reis, R. L.; Correlo, V. M.Melanin is a biopolymer of easy and cheap availability that can be found among the living organisms and excels for its biocompatibility and biodegradability properties, along with scavenging abilities, metal chelation and electronic conductance. This biomaterial can act as a nanocarrier or agent itself to be used in diverse biomedical applications, such as imaging, controlled drug release, bioengineering and bi...
Comparison of ELISA and HPLC-MS methods for the determination of exenatide in b...
Pinho, A. R.; Fortuna, A.; Falcão, A. N.; Santos, A. C.; Seiça, R.; Estevens, C.; Veiga, F.; Ribeiro, A. J.The development of biotechnology-based active pharmaceutical ingredients, such as GLP-1 analogs, brought changes in type 2 diabetes treatment options. For better therapeutic efficiency, these active pharmaceutical ingredients require appropriate administration, without the development of adverse effects or toxicity. Therefore, it is required to develop several quantification methods for GLP-1 analogs products, ...
Envolvimento dos Alunos na Escola: Conceito e Relação com o Desempenho Académic...
Veiga, F.; Taveira, M.; Galvão, D.; Janeiro, I.; Conboy, J.; Carvalho, C.; Caldeira, S.; Melo, Madalena; Pereira, Tiago; Almeida, A.; Baía, S.O conceito de envolvimento dos alunos na escola tem vindo a ser colocado no cerne das discussões relacionadas com o sucesso académico e com o abandono escolar. Este estudo faz uma revisão de literatura acerca deste conceito e das suas relações com o desempenho académico, destacando a sua importância no âmbito da formação de professores. Vários estudos sustentam que a falta de envolvimento dos alunos aparece ass...
Ultrasonication of insulin-loaded microgel particles produced by internal gelat...
Santos, Ana C.; Cunha, Joana; Veiga, F.; Cordeiro-da-Silva, A.; Ribeiro, Antonio J.Alginate-dextran sulfate (ADS) microgel has been used to protect insulin from gastrointestinal attack and as a carrier to promote insulin permeation through intestinal epithelium. The throughput of ADS submicron particles generation by emulsification/internal gelation is limited by its wide size distribution. The aim of this work was to study the recovery protocol influence on ADS particles through the determin...
STUDENT’ S ENGAGEMENT IN SCHOOL: A LITERATURE REVIEW
Veiga, F.; Galvão, D.; Almeida, A.; Carvalho, C.; Janeiro, I; Nogueira, J.; Conboy, J.; Melo, Madalena; Taveira, M.; Festas, I.; Bahia, S.; Cladeira, S.Students’ Engagement in School has been the focus of debate concerning academic success and school dropout, and pointed out as a mean to address the problems affecting our schools and their students, not only for having value in itself, but also for being an important mediator between several academic variables. This paper reviews the research and literature on this concept and its relations with personal and c...
Portuguese Adaptation of Students Engagement in Schools International Scale (SE...
Veiga, F.; Bahia, S.; Nogueira, J.; Melo, Madalena; Festas, S.; Janeiro, I.; Taveira, M.; Galvão, D.; Almeida, A.; Pereira, TiagoThe importance of student’s engagement has been recently pointed out in research. However, there has been a lack of engagement assessment instrument, pertaining psychometric qualities. Objective: This paper presents the Portuguese adaptation of the “Student’s Engagement in School International Scale” (SESIS), drawn up from a12 countries international study (Lam et al., 2012; Lam et al., in press). Method: Psych...
Cronoterapia: estratégia futura para a libertação de fármacos
Barata, Pedro; Lopes, Carla Martins; Santos, D.; Oliveira, Rita; Murias, I.; Veiga, F.O conhecimento da existência de variações fisiológicas ao longo de um período de 24 horas (variação circadiana) em vários sistemas do organismo humano tem sido explorado por parte da Indústria Farmacêutica no sentido de adaptar a administração de medicamentos de acordo com as necessidades biológicas. Deste modo, estão descritos diversos estudos que demonstram resultados eficazes da aplicação da cronoterapia no ...
Evaluation of gastric toxicity of indomethacin acid, salt form and complexed fo...
Rama, A. C.; Figueiredo, Isabel Vitoria; Veiga, F.; Castel-Branco, M. M.; Cabrita, A. M. S.; Caramona, M. M.Indomethacin (IM) is a non-steroidal anti-inflammatory drug which inhibits prostaglandin biosynthesis. It is practically insoluble in water and has the capacity to induce gastric injury. Hydroxypropyl-b-cyclodextrin (HP-b-CD) is an alkylated derivative of b-CD with the capacity to form inclusion complexes with suitable molecules. IM is considered to form partial inclusion complexes with HP-b-CD by enclosure of ...
Terapêutica da Diabetes Tipo1 com Bomba Infusora de Insulina
Alves, M.; Neves, C.; Varela, A.; Arteiro, Cristina; Pereira, L.; Veiga, F.; Cortes, C.; Sousa, Z.; Carvalho, E.; Pimentel, I.; Carvalho, D.[abstract]