Groundwater contamination potential - vulnerability assessment

Águeda watershed is a sub-catchement of the Douro river (northern Portugal) and it is distributed on both Spanish and Portuguese territories. The main core of this work is the achievement of a methodological tool able to be used for vulnerability assessment in ttransboudary watersheds. Groundwaters’ vulnerability mapping was carried out by two different methodological approches: DRASTIC and DRASTIC Pesticide [1]. DRASTIC is a numerical index derived from ratings and weights assigned to seven parameters – Deep to water, net Recharge, Aquifer media, Soil media, Topography, Impact of the vadose zone and hidraulic Conductivity. The obtained values raises between 23 (not vulnerable) to 230 (highly vulnerable). Drastic Pesticide uses the same parameters with the reassignment of attributes’ weights to stress the importance of agricultural activities. DRASTIC’s map for Águeda watershed shows three spatially distributed vulnerability classes: low (102 - 119), moderate (120 - 139) and moderate to high (140 - 154). The low vulnerable zones occupy almost 78% of the all area while the moderate vulnerable zones correspond to 21% of the remaining area. The moderate to high vulnerable zones represents less than 1% of the total area and it is localized in the central part of the Águeda watershed overlapping the tertiary sedimentary aquifer and the mostly populated area. DRASTIC Pesticide map shows four spatially distributed vulnerability classes: low (120 - 139), low to moderate (140 - 159), moderate to high (160 - 179) and high (180 - 195). The high proportion increases considerably in the central zone of the Águeda watershed representing more than 20% of the land parceling. Although similar hydrogeological intrinsic characteristics are observed in the central watershed’s area obvious differences can be stressed when anthropogenic activities are taken into consideration. Feasibility studies and the development of specific monitoring activities must be addressed in future work.Projeto POCTEP Águeda: http://comunidad.uemc.es/investigacion/gema/multileng/es

Surface water’s quality – a risk decision-making approach

Comunicação oral da qual só está disponível o resumo.Surface water’s quality – a risk decision-making approach

Influence of olive anthracnose and olive fruit fly on bioactive compounds of Cobrançosa olive oils

Phenolic compounds are the most important bioactive compounds in olives and since 2012 a health claim can be declared for the olive oil if it contains more than 5 mg of hydroxytyrosol (Hyt) and its derivatives per 20 g of oil1. In turn, β-carotene is a precursor of vitamin A that essentially functions in many biological processes including vision. However, the presence of bioactive compounds in olive oils depends on cultivar, agro-ecological conditions, harvest time, post-harvest, extraction technology and storage.This study was funded by the FCT, Portugal (research project PTDC/ASP-PLA/28547/2017).info:eu-repo/semantics/publishedVersio

Enviromental risks analysis in transboundary watershed : a pilot project in Agueda river

Análise de riscos ambientais em bacias transfronteiriças : projecto-piloto no rio Águeda

Construção de modelos de vulnerabilidade em ambiente SIG : bacia transfronteiriça do rio Águeda

Comunicação oral da qual só está disponível o resumo.Construção de modelos de vulnerabilidade em ambiente SIG: Bacia transfronteiriça do rio Águeda

Self-avoiding fractional Brownian motion - The Edwards model

In this work we extend Varadhan's construction of the Edwards polymer model to the case of fractional Brownian motions in $\R^d$, for any dimension $d\geq 2$, with arbitrary Hurst parameters $H\leq 1/d$.Comment: 14 page

Análise da vulnerabilidade e risco para as águas subterrâneas da bacia do rio Águeda

Análise da vulnerabilidade e risco para as águas subterrâneas da bacia do rio Águeda

Low temperature behavior of poultry fat biodiesel:diesel blends

AbstractAs the worldwide consumption of poultry meat rises the use of poultry fat as a feedstock for biodiesel production becomes attractive considering economical and environmental reasons. However, poultry fat biodiesel still faces some restrictions due to its poor flow properties at low temperatures. In this study ethylic and methylic poultry fat biodiesels and their blends with diesel were evaluated in terms of flow properties. Modulated Temperature Differential Scanning Calorimetry (MT-DSC) was used to understand the physical meaning of properties as Cold Filter Plugging Point (CFPP), Pour Point (PP) and Cloud Point (CP), widely used in biodiesel characterization. Based on the MT-DSC studies, it was observed that the first crystallization peak temperature had values similar to CFPP and CP. This way CP was found to be associated with the first solidified material and not with the early formation of the first nuclei, as normally reported. On the other hand, these crystals already lead to the flow decrease, as indicate by the CFPP results. PP values were close to the second crystallization peak temperature, not being related to the complete solidification of the fuel

Exclusion of Class III malocclusion candidate loci in Brazilian families

The role played by genetic components in the etiology of the Class III phenotype, a class of dental malocclusion, is not yet understood. Regions that may be related to the development of Class III malocclusion have been suggested previously. The aim of this study was to search for genetic linkage with 6 microsatellite markers (D1S234, D4S3038, D6S1689, D7S503, D10S1483, and D19S566), near previously proposed candidate regions for Class III. We performed a two-point parametric linkage analysis for 42 affected individuals from 10 Brazilian families with a positive Class III malocclusion segregation. Analysis of our data indicated that there was no evidence for linkage of any of the 6 microsatellite markers to a Class III locus at = zero, with data supporting exclusion for 5 of the 6 markers evaluated. The present work reinforces that Class III is likely to demonstrate locus heterogeneity, and there is a dependency of the genetic background of the population in linkage studies