28 documents found, page 1 of 3

Territorial embeddedness of sustainable agri-food systems. A systematic review

The current food systems require an urgent transition toward more sustainable food landscapes. One key discussion arising is on the potential of territorial approaches to foster the sustainability of agri-food systems, for which this paper provides a review. This systematic literature review is based on bibliometric methods which allowed us to identify in a fairly unbiased manner the most impactful authors, pap...

Influence of Inhibitors Generated in Lignocellulosic Hydrolysates from Group of...

ABSTRACT: Concerns over fossil fuels are of increasing interest in biorefineries that utilize lignocellulosic residues. Besides sugars, inhibitors are formed during biomass pretreatment, including acetic acid (AI) and formic acid (FI), which can hinder microbial fermentation. The TG1 and Tuner strains of Escherichia coli were subjected to various acid concentrations. Samples were taken during fermentation to mo...

Fractionation of macroalgae carbohydrates using hydrothermal and dilute inorgan...

ABSTRACT: Furans are among the most important compounds derived from biomass, providing conversion pathways for sustainable alternatives to petroleum-based fuels and materials. Furfural, 5-hydroxymethylfurfural (5-HMF), and 5-methylfurfural (5-MF) are furans that can be obtained by carbohydrate dehydration under acidic conditions at elevated temperature and pressure. One of the mechanisms to produce these compo...

Como o trabalho do LNEG apoia a concretização do PNEC: Plano Nacional de Energi...

Theoretical positions and approaches on the territorial embeddedness of sustain...

Here we make an exhaustive review of the literature regarding the territorial connection of sustainable agri-food systems. This connection must be seen in a holistic manner and impacts directly food sovereignty. We base this systematic literature review on bibliometric methods allowing us to highlight a set of descriptive findings that clearly enlighten the reader on the most im- pactful authors, papers, journa...

Mapeando o desenvolvimento da agroecologia em Portugal -Ciência e movimentos

Com este trabalho procuramos fazer uma caracterização do estado actual da agroecologiaem Portugal, retrato até agora muito incompleto. Seguindo um raciocínio consolidado na literatura,a agroecologia tem sido entendida simultaneamente como uma ciência, uma prática e ummovimento social. Este artigo, limitado a uma parte do trabalho de investigação de doutoramento,foca-se unicamente nas dimensões ‘ciência’ e ‘movi...

How does dilution affect the conductivity, the propensity to aggregate and the ...

The current theories do not provide a convincing explanation for many of the protein' manifestations in solution. Therefore, to shed some light on this critical question, the present work analyzed the effect of dilution on the ability of proteins to catalyze chemical reactions, the so-called biological activity. As models enzymes, laccase from Trametes versicolor and chicken egg white lysozyme were used. The re...

A feasibility study on real-time concealed object detection in foliage using ST...

This paper reports on the first results of a Swept Time-Delay Cross Correlator (STDCC) based radar performance for the detection of concealed objects in a foliage. The real-time STDCC radar operating at 25 GHz with 500 MHz bandwidth detection capabilities is benchmarked together with a VNA technique using a central frequency of 11 GHz with 18 GHz bandwidth. A set of measurements were performed to assess the att...

Reconfigurable millimetre-wave RF front-end for radar and 5G applications

This paper proposes a reconfigurable RF architecture to cope with radar applications in autonomous driving vehicles and the next generation of communications (5G). A radio front-end architecture operating at frequencies between 24 and 27.5 GHz to deliver a small form-factor design that could easily be changed and ease future improvements, has been developed. Based on X-microwave ecosystem, a fully reconfigurabl...

The impact of demographic and clinical characteristics on diabetic painful neur...

Introduction: Diabetic neuropathy (DN) is one of the most devastating complications of diabetes mellitus; however, in contrast to other countries, there are no scientific studies in Portugal evaluating the impact of demographic and clinical characteristics of this pathological entity. The aim of this study was to evaluate the impact of gender, metabolic control, age of diabetic patients, as well as time of dise...