Encontrados 26 documentos, a visualizar página 1 de 3
A Family of Styrylcoumarins: Synthesis, Spectroscopic, Photophysical and Photoc...
Avó, João; Martins, Sérgio; Parola, António; Lima, João; Ramalho, João; Branco, Paula; Pereira, AntónioA new family of 5-styrylcoumarins exhibit E–Z isomerization around the Cα[DOUBLE BOND]Cβ bond with large extinction coefficients, medium-lived excited states, and moderate fluorescence quantum yields (see picture). The alteration of these photophysical properties is also corroborated by computational studies.
Esculetin-based Organic Chromophores for Dye Sensitized Solar Cells
Martins, Sérgio; Maçaira, João; Andrade, Luísa; Mendes, Adélio; Branco, Paula; Pereira, AntónioThe development of efficient solar energy harvesting systems is one of the greatest scientific challenges today. Recently attention has been driven to alternative solar collecting devices based on an optical absorbing chromophore anchored to the semiconductor surface. Our previous work on coumarins demonstrated that this molecules can be easily tune to incorporate substituents that allow to increase the conjuga...
New water-soluble amine-reactive reagents for labeling microbial cells: applica...
Martins, Sérgio; Rosado, Tânia; Caldeira, Ana; Pereira, AntónioMural paintings are continuously exposed to physical, chemical and biological degradation, however, among the biological agents that cause deterioration, microorganisms are of critical importance, due to their metabolic versatility and flexibility, and their ability to tolerate unfavourable conditions. Thereby, microorganisms can cause damages in mural paintings surfaces through a variety of mechanisms, includi...
Evaluation of anti-microbial potential of hydroxycoumarins
Fernandes, Cátia; Martins, Sérgio; Rosado, Tânia; Caldeira, Ana; Pereira, AntónioCoumarins comprise a very large class of substances found in plants and are made of fused benzene and α-pyrone rings. More than 1300 coumarins have been identified, principally as secondary metabolites in green plants but also in fungi and bacteria. Coumarin and its derivatives are considered nowadays an important class of organic compounds due to their wide spectrum of biological activities and therapeutic app...
Evaluation of anti-microbial potential of 3-ethenylcoumarins and their precursors
Ramos, João; Martins, Sérgio; Rosado, Tânia; Caldeira, Ana; Pereira, AntónioCoumarins, classified as benzo-α-pyrones, are part of a large class of secondary phenolic metabolites derivatived from cinnamic acid, widely distributed in the plant kingdom but can also be found in fungi and bacteria. Today there are more than 1300 identified structures. In some plants they are mainly accumulated in the leaves, inhibiting the growth of pathogenic fungi and repelles insects. Coumarins are nowad...
Planificação e execução de uma época desportiva
Martins, Sérgio Manuel de FreitasEste trabalho teve por objetivo a obtenção de um dossier que pode servir de base a qualquer época que queira começar futuramente. Para tal, realizei um estágio, ao longo da época 2011/2012, na secção de Voleibol do Vitória Sport Clube, mais concretamente, integrando a equipa Sénior feminina, como treinador adjunto da mesma. Os principais objetivos para este estágio foram adquirir mais conhecimentos da modalidad...
Treinador automático para a equipa CAMBADA
Martins, Sérgio Filipe SilvaA robótica é a área da ciência que estuda o design, construção e uso de máquinas para executar tarefas tradicionalmente feitas por seres humanos. O futebol não é apenas o desporto rei da humanidade mas também o desporto mais usado para o desenvolvimento de robôs com capacidades desportivas. A iniciativa RoboCup promove competições robóticas a nível mundial, sendo o futebol robótico uma das mais importantes, con...
Synthesis, Absortion and Emission Properties of a New Family of Styryl Coumarin...
Martins, Sérgio; Avó, João; Parola, António; Lima, João; Branco, Paula; Pereira, AntónioSYNTHESIS, ABSORPTION AND EMISSION PROPERTIES OF A NEW FAMILY OF STYRYL COUMARINS. POTENTIAL UTILITY AS MEMORY MEDIA Sérgio Martins,[a] João Avó, [b] A. Jorge Parola, [b] João C. Lima, [b] Paula S. Branco[b] and António Pereira[a] [a] Centro de Química, Departamento de Química, Universidade de Évora, Évora, Portugal, sergiomamartins@gmail.com [b] REQUIMTE, Departamento de Química, Faculdade de Ciências e Te...
Photochromism of 5-styryl coumarins: potential utility as memory media
Martins, Sérgio; Avó, João; Parola, António; Lima, João; Branco, Paula; Ramalho, João; Pereira, AntónioPhotochromism of 5-styryl coumarins: potential utility as memory media Sérgio Martins1, João Avó2, A. Jorge Parola2, João C. Lima2, Paula S. Branco2, João Paulo Ramalho1 and António Pereira1 1Centro de Química, Departamento de Química, Universidade de Évora, Évora, Portugal. 2REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Portugal. Photochromism, the rever...
Interface de Gestão Web para HP OpenView
Ricardo Martins; Sérgio Bernardo; José Luís OliveiraThe growth of the data communication networks created the need of automatic, inexpensive and efficient management software, with small human resources allocated, capable of perform all the management tasks in the growing network peripherals.The Internet movement leads the management technologiesto simple, inexpensive and flexible solutions. The WEB technologies, and all the associated l...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||