Encontrados 13 documentos, a visualizar página 1 de 2

Protecção biológica de conservação e gestão de largadas de auxiliares

Os complexos de espécies de parasitóides e predadores que limitam as populações das principais pragas de culturas hortícolas protegidas, mosquinhas brancas, larvas mineiras, lagartas, afídeos e tripes, têm vindo a ser estudados na região Oeste desde há mais de 25 anos. A riqueza específica encontrada nestes complexos é elevada. Algumas das espécies identificadas são comercializadas para largadas. E...

Investigating Population Structure of Sea Lamprey (Petromyzon marinus, L.) in W...

This study hypothesizes the existence of three groups of sea lamprey Petromyzon marinus L. in Portugal (North/Central group, Tagus group, and Guadiana group), possibly promoted by seabed topography isolation during the oceanic phase of the life cycle. Within this context, our purpose was to analyze the existence of a stock structure on sea lamprey populations sampled in the major Portuguese river basins using b...

Lampreys of the Iberian Peninsula: distribution, population status and conserva...

The 3 lamprey species, sea lamprey Petromyzon marinus L., European river lamprey Lampetra fluviatilis L. and European brook lamprey L. planeri Bloch, that inhabit the Iberian Peninsula are of conservation concern. They are considered either Vulnerable, Critically Endangered, and even Extinct in different regions of this area mainly due to habitat loss and population fragmentation. Although several other factors...

Regulation of the wind power production: contribution of the electric vehicles ...

The increase in penetration of variable renewable energy sources (RES) introduced additional difficulties regarding the management of the Portuguese Power System. This is mainly due to the high temporal variability and low controllability, characteristics of these kinds of sources. There is a real need to reduce the impact of non-dispatchable RES sources; maximizing their penetration and minimizing curtailment....

Regulation of the wind power production: contribution of the electric vehicles ...

The increasing penetration of renewable energy sources (RES) introduces additional difficulties in the design and operation of the power systems, mainly due to the high timevariability of these renewable resources, their non-dispatchability and the poor correlation with load profiles. In order to reduce negative impacts for the power systems while maximizing the penetration of RES - especially in power system...

Development of a Tomato spotted wilt virus (TSWV) risk evaluation methodology ...

A risk map for the Tomato spotted wilt virus (TSWV) was elaborated for the main Portuguese processing tomato producing region, the "Ribatejo e Península de Setúbal" region, where periodically this virus causes severe losses. Forty nine tomato fields were monitored. Risk factors for TSWV infection were identified and quantified according to their relative importance in TSWV incidence. The risk factors consider...

Can heart tissue fatty acid profile be used as a tool to discriminate sea lampr...

This study proposes to evaluate the use of heart tissue fatty acid signature and multivariate analysis of fatty acid profile as a possible discriminating tool for sea lamprey P. marinus populations sampled in Portuguese river basins. Local fisherman collected adult sea lampreys in eight Portuguese river basins (Minho, Lima, Cávado, Douro, Vouga, Mondego, Tagus and Guadiana) at the beginning of their spawning mi...

Anastomoses colônicas após mucosectomia química, em ratos

OBJETIVO: Avaliar, experimentalmente, os efeitos da mucosectomia química sobre a cicatrização de anastomoses colônicas. METODOLOGIA: Estudou-se 17 ratos Wistar machos divididos nos seguintes grupos: A (n=12), anastomose colônica; B (n=13), anastomose colônica após mucosectomia. A mucosectomia foi realizada através da introdução de um bastão de nitrato de prata a 10%, durante um minuto, através das duas bocas a ...

Death kinetics of Escherichia coli in goat milk and Bacillus licheniformis in c...

The influence of ohmic heating on the death kinetic parameters of Escherichia coli ATCC® 25922 in goat milk and spores of Bacillus licheniformis ATCC® 14580 in cloudberry jam was investigated and compared with that of conventional heating. Ohmic treatment of goat milk shortened the decimal reduction time D in comparison with the D values obtained at conventional treatment. Similarly, the z value, increase of te...

Effects of moderate electric fields on the chemical composition and microbial d...