Versão 'draft' ; We construct a three-color Potts-like model for the graphene zigzag edge reconstructed with Stone-Wales carbon rings in order to study its thermal equilibrium properties. We consider two cases which have different ground states: the edge with nonpassivated dangling carbon bonds and the edge fully passivated with hydrogen. We study the concentration of defects perturbing the ground-state config...
BACKGROUND: Accurate risk stratification is an important step in the initial management of acute coronary syndrome (ACS), and current guidelines recommend the use of risk scores, such as the Global Registry of Acute Coronary Events risk score (GRACE RS). Recent studies have suggested that abdominal obesity is associated with cardiovascular events in patients with ACS. However, little is known about the addition...
Abstract: To determine RS prevalence, diagnosed at the Portuguese Primary Health Care Centres (PHCC), and to assess diagnostic and treatment practices. Study Design: Epidemiologic, cross-sectional study. Material and Methods:A cohort of subjects attending general practice medical appointments, in selected PHCC, was evaluated. Results: Between May/2008 and June/2009, 1,201 subjects were included with a mean age ...
Biochemical methane potential of four species of Ulva and Gracilaria genus was assessed in batch assays at mesophilic temperature. The results indicate a higher specific methane production (per volatile solids) for one of the Ulva sp. compared with other macroalgae and for tests running with 2.5% of total solids (196 ± 9 L CH4 kg−1 VS). Considering that macroalgae can potentially be a post treatment of municipa...
No primeiro ano da licenciatura em Ciências da Nutrição, na Faculdade de Ciências da Nutrição e Alimentação, da Universidade do Porto, existem duas Unidades Curriculares que introduzem a Bioquímica aos estudantes [Química Orgânica e Bioquímica I (no 1º e 2º semestres, respetivamente)] e cujos programas e modalidades pedagógicas estão inter-relacionados, confrontando o estudante, progressivamente ao longo do ano...
Tomographic image can be degraded, partially by patient based attenuation. The aim of this paper is to quantitatively verify the effects of attenuation correction methods Chang and CT in 111In studies through the analysis of profiles from abdominal SPECT, correspondent to a uniform radionuclide uptake organ, the left kidney.
In this paper, we study zigzag graphene nanoribbons with edges reconstructed with Stone-Wales defects, by means of an empirical (first-neighbor) tight-binding method, with parameters determined by ab initio calculations of very narrow ribbons. We explore the characteristics of the electronic band structure with a focus on the nature of edge states. Edge reconstruction allows the appearance of a new type of edge ...
O Síndrome de Sweet (SSw) é uma dermatose neutrofílica caracterizada pela presença de febre, neutrofilia e lesões cutâneas cuja histologia revela um infiltrado inflamatório difuso neutrofílico da derme. A fisiopatologia deste Síndrome ainda não foi totalmente esclarecida. Pode ser idiopático ou associar-se a diversas patologias (infecciosas, neoplásicas, inflamatórias) pelo que deve ser primariamente considerad...
Financiadores do RCAAP | |||||||
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |