4,538 research outputs found
Regional planning of river protection and restoration to promote ecosystem services and nature conservation
[Except] International conservation and sustainability agendas (CBD, 2010; European Union, 2011; IPBES, 2018; United Nations, 2018) have repeatedly called for conservation, restoration and sustainable use of biodiversity as well as the enhancement of ecosystem services and benefits to society. These calls are particularly relevant for freshwater ecosystems, which combine conservation interest and high societal value through the supply of multiple ecosystem services (Tharme, Tickner, Hughes, Conallin, & Zielinski, 2018). Freshwater habitats, biodiversity and ecological functions are also amongst the most threatened worldwide, due to a broad range of anthropogenic pressures (IPBES, 2018; Reid et al., 2019). In the European Union, 63% of river and lake habitats protected under the Habitats Directive are considered to hold “Unfavourable” conservation status, and 60% of water bodies are not in “Good” ecological status (IPBES, 2018). [...]Fundação para a Ciência e Tecnologia (FCT) through a doctoral fellowship (SFRH/BD/115030/2016) co-financed by the European Social Fund through the Human Capital Operational Program (POCH), the North Portugal Regional Operational Programme (NORTE2020) and national funds from the Ministério da Ciência, Tecnologia e Ensino Superior (MCTES). CV would like to acknowledge the support of the Portuguese Infrastructure of Scientific Collections (POCI-01-0145FEDER-022168) (PRISC.pt). JG developed this work within the scope of the project proMetheus – Research Unit on Materials, Energy and Environment for Sustainability, FCT Ref. UID/05975/2020, financed by national funds through the FCT/MCTE
Green processing of porous chitin structures for biomedical applications combining ionic liquids and supercritical fluid technology
The application of green chemistry principles in the processing of materials for advanced technologies is a
steadily increasing field of research. In this work porous chitin-based materials were developed by combining the processing of chitin using ionic liquids (ILs)as a green solvent together with the use of super-
critical fluid technology(SCF) as clean technology.Chitin was dissolved in 1-butyl-3-imidazolium
acetate,followed by regeneration of the polymer in ethanol in specific moulds.The IL was removed using
Soxhlet extraction and successive steps of extraction with SCF using carbon dioxide/ethanol ratios of 50/
50 and70/30.The developed porous chitin-based structures (ChIL)can be classified as mesoporous materials,with very low density and high porosity.The cytotoxicity of ChIL extracts was investigated using
L929 fibroblast like cells,and the results demonstrated that the produced materials have extremely
lowcytotoxicityl evels.Therefore,the findings suggest that the porous chitin structures may be potential candidates for a number of biomedical applications,including tissue engineering.Fundação para a Ciência e Tecnologia (FCT)S.S.S. and A.R.C.D. thank the Portuguese Foundation for Science
and Technology (FCT) for post-doctoral fellowships (SFRH/BPD/
45307/2008 and SFRH/BDP/34994/2007, respectively). This work
was partially supported by the FCT (Project PTDC/QUI/68804/
2006) and was carried out under the scope of the European NoE
EXPERTISSUES (NMP3-CT-2004-500283)
Colour filtering in a-SiC : H based p-i-n-p-i-n cells: A trade-off between bias polarity and absorption regions
A large area colour imager optically addressed is presented. The colour imager consists of a thin wide band gap p-i-n a-SiC:H filtering element deposited on the top of a thick large area a-SiC:H(-p)/a-Si:H(-i)/a-SiC:H(-n) image sensor, which reveals itself an intrinsic colour filter. In order to tune the external applied voltage for full colour discrimination the photocurrent generated by a modulated red light is measured under different optical and electrical bias. Results reveal that the integrated device behaves itself as an imager and a filter giving information not only on the position where the optical image is absorbed but also on it wavelength and intensity.
The amplitude and sign of the image signals are electrically tuneable. In a wide range of incident fluxes and under reverse bias, the red and blue image signals are opposite in sign and the green signal is suppressed allowing blue and red colour recognition. The green information is obtained under forward bias, where the blue signal goes down to zero and the red and green remain constant. Combining the information obtained at this two applied voltages a RGB colour image picture can be acquired without the need of the usual colour filters or pixel architecture. A numerical simulation supports the colour filter analysis
Committed to quality in physical activity programmes for elderly people – The customer results
There has been a growing concern in conceiving physical activity (PA) programmes for elderly people since the evidence indicates that this type of health promotion interventions may reduce the deleterious effects of the aging process. In Portugal, the Public Administration is the sector that offers the largest supply of goods and services and as such, it is the sector that must devote most attention to Quality Some studies support the EFQM Excellence Model as an operational framework for Total Quality Management. Excellent Results with respect to Performance, Customers, People and Society are achieved through Leadership driving Policy and Strategy that is delivered through People, Partnerships and Resources, as well as Processes. Consequently, the EFQM Model might be used as a self-assessment instrument, to discern the strengths of the programmes, as well as areas in which improvement can be made. The purposes of this study were 1) to examine the existence of customers’ outcomes measurement in Portuguese PA programmes for elderly people, comparing it with programmes’ characteristics and 2) to analyse the associations between the different evaluated items. Data were collected by an on-line questionnaire sent to 26 Coordinators of PA Programmes. Descriptive statistics were used in order to characterize de PA programmes and the participants’ outcome measurement items. Statistical analysis was performed using Fisher’s Exact Test and Pearson’s Qui-square test. 57,7 % of the programmes recorded participants’ outcome measures at regular intervals. Most of them (73,3%; p 0.05) were free of charge programmes. Statistically significant associations were found between the following outcomes items: cardiorespiratory fitness, flexibility, muscular strength, coordination, balance and body composition. Portuguese PA programmes for elderly people showed a feeble attention on participants’ outcome measures, even though the measurement process represents one of the most important components of customer results from an exercise programme. Furthermore, there are significant differences between customers’ outcome measures chosen by each programme.info:eu-repo/semantics/publishedVersio
Efeito da omissão de nutrientes nos teores de macronutrientes em tecidos foliares do cafeeiro "Acaiá do Cerrado".
O auxílio à captação de recursos para empresas incubadas, através da experiência em aprovação de projetos por profissionais de uma Instituição de Ciência e Tecnologia.
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