BACKGROUND: Examining changes in brain activation linked with emotion-inducing stimuli is essential to the study of emotions. Due to the ecological potential of techniques such as virtual reality (VR), inspection of whether brain activation in response to emotional stimuli can be modulated by the three-dimensional (3D) properties of the images is important. OBJECTIVE: The current study sought to test whether th...
The electroluminescence yield was studied for xenon gas as a function of the electric field in the scintillationregion, for room temperature using a gas proportional scintillation counter. A large area avalanche photodiode was used for the readout of the VUV secondary scintillation produced in the gas, together with the 5.9-keV x-rays directly absorbed in the photodiode. Using the latter as a reference for the ...
Background Giardia duodenalis is a widespread parasite of mammalian species, including humans. The prevalence of this parasite in children residing in Portugal is currently unknown. This study intended to estimate G. duodenalis infection prevalence and identify possible associated risk factors in a healthy paediatric population living in the District of the Portuguese capital, Lisbon. Methods Between Februar...
The effect on the wine protein haze potential of five organic acids commonly encountered in wines (L(+)- tartaric, L( )-malic, citric, succinic and gluconic acids) was assessed. All five acids, tested at 20 mM, reduced dramatically the haze potential of proteins, either in wine or dissolved in water, throughout the range of pH values typical of wines (i.e., from 2.8 through 3.8). Subtle differences among the ac...
Realizou-se um estudo para caracterizar a situação epidemiológica da brucelose bovina no Estado de Mato Grosso do Sul. Foram definidos três estratos (regiões): Pantanal-corte, Planalto-corte e Planalto-leite, este último subdividido em Bolsão, Campo Grande e Dourados. Em cada estrato foram amostradas aleatoriamente propriedades e, dentro dessas, foi escolhido, de forma aleatória, um número pré-estabelecido de a...
After a first contact with Evans' root locus plots, in an introductory course about classical control theory, students usually pose questions for which the answers are not trivially found in the usual textbooks. Examples of such questions are: Can a branch intersect itself? Can two or more branches be coincident? Can a branch intersect its asymptote? In this paper devoted to helping teaching, numerical examples...
A congestão nasal é o sintoma mais referido nas doenças inflamatórias e/ou infecciosas da mucosa nasal, sendo a rinite alérgica a sua causa mais frequente. Existindo deficiente informação epidemiológica sobre a problemática em discussão, o presente estudo avalia e caracteriza a prevalência da obstrução nasal na população adulta e a situação actual quanto à etiologia e tratamento deste sintoma tão frequente na p...
Objectivos: Determinar a prevalência e caracterizar o perfil dos doentes com rinossinusite aguda e crónica, em Portugal Continental. Desenho do estudo: Estudo epidemiológico transversal. Metodos: Aplicação de um questionário a um grupo representativo de 5.116 indivíduos de ambos os sexos, entre os 14 e os 65 anos. Resultados: A prevalência total de rinossinusite foi de 13,7%(11,3% aguda e 2,4% crónica), sendo m...
Financiadores do RCAAP | |||||||
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |