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UTL Repository Universidade Técnica de Lisboa (13,244 recursos)
O Repositório Institucional da Universidade Técnica de Lisboa desenvolvido no âmbito do projecto RCAAP. Este repositório destina-se a recolher, preservar e disponibilizar o acesso às publicações científicas e didácticas de seis: Escolas da UTL: Faculdade de Medicina Veterinária, Instituto Superior de Agronomia, Instituto Superior de Economia e Gestão, Instituto Superior de Ciências Sociais e Políticas , Faculdade de Motricidade Humana, Faculdade de Arquitectura. O Instituto Superior Técnico, igualmente Escola Da UTL, tem repositório independente.

BISA - Teses de Mestrado

Mostrando recursos 181 - 200 de 749

181. Sustentabilidade, turismo e áreas protegidas: a abordagem da resiliência no contexto do Parque Natural Vale do Guadiana - Ribeiro, Cátia Sofia Magrito
The Resilience thinking changes our way of understanding the Social-Ecological Systems and of assessing their sustainability because it favors a holistic vision and uncertainty is the key feature in its models. Recently a revision of this approach has been developed to analyze the sustainability of protected area tourism. This dissertation takes this conceptual framework and tries to apply it to a specific case study, the Parque Natural Vale do Guadiana‗s tourism system. In the first part of this dissertation a review about the sustainability concept and its importance in the tourist sector, especially in protected areas tourism, is made and...

182. Gestão de resíduos sólidos urbanos e perspetiva de melhoria. Caso de estudo: Assomada - Cabo Verde - Correia, Romina Patrícia Lopes
This paper aims to characterize the state of art of solid waste management in Assomada city, identifying the main difficulties associated to the management of municipal solid waste (MSU) and making suggestions for improving MSW management strategy in the municipality. The assessment of the production of waste, characterizing and quantifying the waste generated from the source of production to the final destination. We evaluated the satisfaction of the population in relation to the management of MSW and availability for future collaboration on improving that, and the satisfaction of the population of Ribeira da Barca for the location of municipal waste. The...

183. Estudo de prospectiva das necessidades tecnológicas da fileira hortofrutícola - Carvalho, Lopo Maria d'Orey Manoel Lopo
The Prospective study of the technological needs of the vegetable and fruit row had, as the primary objective, the purpose of clearly identifying the technological needs for both rows so that the whole sector, meeting future trends in advance, could gain competitive advantage and thus promote its development priorities. To perform a foresight study with a scientific orientation, we used the Delphi’s method. To follow this method, the collaboration of specialists from both areas of research is required. Being so, they were asked to answer to two surveys with the same statements – the only difference between them was that, following...

184. Utilização do azeite na fritura de alimentos - Carapinha, Pedro Gomes
Olive oil has been widely used in the cuisine of the Mediterranean basin, due to its organoleptic properties and also to its oxidative thermostability.ascribed to the richness in monounsaturated fatty acids and high concentration of natural antioxidants. Two heating trials were performed to.evaluate the thermostability of two olive oils with the name: “extra virgin olive oil” and “olive oil” (moisture of virgin olive oil with refined olive oil): one of these trial consisted on heating at 180ºC (±2ºC) during 63 hours and the other one was a heating trial with frying periods of frozen potato chips, for 45 hours. Several physico-chemical parameters...

185. Avaliação do impacto dos factores climáticos na qualidade do habitat do Sisão (Tetrax tetrax) através de deteção remota - Martins, Ana Rita Mendes
The Little Bustard Tetrax tetrax is a bird adapted to agricultural systems, considered endangered in the Iberian Peninsula, Europe region particularly vulnerable to climate change. During the breeding season, Little Bustard shows preference for fallow land and pastures, feeding mainly of vegetable matter. The NDVI, extracted from satellite images, can be interpreted as an index of vegetation greenness and therefore with a high potential as a predictive variable of the distribution and abundance of the Little Bustard. The objective of this study aims to understand how climate influences the NDVI and how NDVI relates to the Little Bustard abundance in...

186. Novos adubos na produção de ervilha - Botelho, Nuno Miguel Martins
The present study was conducted in one of the pea producers of Bonduelle (Portugal) Agroindústria, S.A., in collaboration with the Department of Science and Biosystems Engineering (DCEB) of the Instituto Superior of Agronomia and ADP-Fertilizantes, S.A. The study aimed at evaluating the effect on commercial production and quality of pea, of four experimental treatments, the control without fertilization, and three fertilizer formulations - NPK (20 kg N, 51.4 kg P2O5 and 77 kg K2O per hectare), NPK + PGA (poly-!-glutamic acid and phytohormones) and NPK + Algin (sodium alginate) on commercial production, tenderometric degree (TR) and alcohol insoluble solids (AIS) of garden pea. Statistical analysis revealed no significant...

187. Segurança alimentar em Cabo Verde. Estudo de caso no concelho de Ribeira Grande, Ilha de Santo Antão - Monteiro, Manuel Francisco Fortes
Cape Verde is largely dependent on overseas countries with regard to food. Local production is limited, but relevant to food security. This dissertation aims to study the role that agricultural production, namely horticulture, production of rainfed crops and production of sugar cane has on the producers income, food security and improving the quality of life of households. We conducted a case study in the municipality of Ribeira Grande, island of Santo Antão. Surveys were conducted in the localities of Ribeirão and Garça de Cima (105 family household), equally distributed among horticulture farmers, producers of sugar cane and rainfed farmers. It was found that sugar cane producers have a median...

188. Efeitos da aplicação de resíduos orgânicos ao solo na flora espontânea - Salsinha, Henrique Faleiro Colaço Correia
The objective of this thesis was the observation of the effects of organic residues application on the spontaneous flora of a soil located in “Terra Grande” inside “Tapada da Ajuda”, the University campus. Sixteen plots have been marked and in each one of them an organic residue was applied, replicated four times. The organic residues tested were: pig slurry, poultry manure, and compost of municipal solid waste. Four plots with no residue application were marked for control. During three months, the growth of the spontaneous flora in this soil was monitored. Soil samples were taken from all sixteen plots after the application...

189. Determinação da razão isotópica 87Sr/86Sr por ICP-MS no sistema solo-vinho - Martins, Patrícia Alexandra Pardal
One of the most challenging matters regarding wine authenticity is the control of geographical provenance. The strontium isotope ratio 87Sr/86Sr has been suggested to be a promising fingerprint for wine provenance identification. It is based on the assumption that there is a correlation between the ratio 87Sr/86Sr of the wine and that of the soil in which the vine as grown. The aim of this study was to assess the 87Sr/86Sr ratios of vineyard soils from Portuguese DO and evaluate its suitability as a tool for provenance authentication It was optimized an analytical protocol for the determination of the isotopic ratio 87Sr/86Sr in soil-wine system by Q-ICP-MS...

190. Avaliação da aptidão tecnológica do leite de ovelha para o fabrico de Queijo de Azeitão DOP - Barros, Ana Cláudia Bizarro Brito
The purpose of this study was to characterize the milk used in the manufacture of Azeitão cheese, in particular the physico-chemical properties, hygiene and technological aptitude, given the influence of milk quality in cheese making. Sampling took place from February to May and samples from raw milk sheep for the manufacture of Azeitão cheese, consisting of individual milk (one producer) or mixed (from different producers) milk, were analyzed for composition, hygiene and parameters for the assessment of the milk clotting behavior, such as clotting time, micellar aggregation properties and gel firmness. The effect of the milk producer was very significant (p <0.01) at both the physical-chemical composition,...

191. Extractos aquosos de Pterospartum tridentatum L. teor de compostos fenólicos totais e actividade antioxidante - Pimenta, Ana Catarina Mendes
Carqueja, Pterospartum tridentatum L., is a shrub common in mountainous areas and acids land, used in traditional medicine and gastronomy. In order to evaluate the eventual production of extracts of this plant, the effect of harvest period and extraction time on yield, phenolic content (PC) and antioxidant activity (AA) of the extracts was studied. Plant samples, harvested in Malcata and Gardunha mountains, were subjected to consecutive extraction steps in boiling water. After each step the aqueous phase was recovered and liophilized. The highest yield extraction was obtained in the dormancy period, with 46 and 25 % m/m (d.m) in plants...

192. Análise do mercado de vinhos nos EUA. Situação actual de Portugal: análise e reflexão sobre estratégias futuras - Rodrigues, Mafalda Fernandes Vasques
The United States of America is the world’s biggest economy and one of the most important consumers and importers of wine in the world. Although the exports of Portuguese wine have been increasing in the recent years, there has been a generalized over-production. For these reasons, the question was raised: why isn’t the Portuguese wine more exported to the US market? Based on these evidences and trying to find answers for the above question, this work (1) analysed the grape and wine production in the world and, in a more specific way, in Portugal and the USA; (2) verified the...

193. Optimization of air micro-bubble bioreactor for the winery wastewater treatment under oxygen-limited conditions - Silva, Henrique Joaquim Lopes da Silva e
The energy consumption of wastewater treatment processes had become an important tool parameter for designers and engineers in the wastewater treatment industry, and efforts to improve the energy efficiency of the equipments represent a great challenge. The present study proposes the use of the Air Micro-Bubble Bioreactor (AMBB), with a working volume of 14 dm3 and a hydraulic retention time of 14 days, operating in continuous mode to treat winery wastewater from second racking period, for seven different runs, during 167 days. The organic loads fluctuations, usual in the winemaking industry, and the aeration time rate (ATR), both related to energy...

194. Estenfiliose na couve coração-de-boi - Bizarro, Piedade Maria Dinis Bernardes
This study aims to contribute to the diagnosis of brown spot of spitzkool cabbages, clarifying symptoms associated with the disease and its evolution in the final stage of field. We identified the causative agent of the disease as Stemphylium sp. by classical methods of mycology and sequencing fragments amplified by PCR of DNA purified from cabbage leaves with injuries, which has shown very significant homologies with the fungal genus Stemphylium. We tested the biological efficacy of six fungicides for Stemphylium sp. in in vitro studies. The mycelial growth was inhibited by more evidence fungicide pyraclostrobin + boscalid, pyraclostrobin and difenoconazole + dimethomorph. Based on these results, were selected pyraclostrobin...

195. Exploração de recursos vivos marinhos da costa portuguesa. Estudo de caso de pequenos tunídeos: merma ( Euthynnus alletteratus) e judeu (Auxis spp.) - Jalé, João Humberto Pereira da Silva Tavares
The sea related activities always had great importance in Portugal, especially the fishing activity and the processing industry of marine products. However, in the last decades, the decrease of both activities has occurred, with a significant reduction in the number of fishermen and fishing fleet and a major reduction on the number of canning factories in activity, mainly due to the Common Fisheries Politics of EU. In this work, an analysis of the species which make up the food product that retains the case of Auxis spp. (Judeu) and Euthynnus alletteratus (Merma), captured on the Algarve coast and recovered through the...

196. Influence of soil parameters on ectomycorrhizal diversity in montado ecosystems - Barrento, Maria João Hortas
This study characterized the composition and the diversity of macrofungal communities associated with four plots of montado situated in Grândola Hills, Southern Portugal, and evaluated the influence of soil parameters on ectomycorrhizal fungal diversity and abundance. Phosphorus, potassium, total nitrogen, organic matter concentrations and soil pH were the parameters determined. Differences in soil chemical features were found between studied plots. A total of 132 species of macrofungi were found in the study area being Laccaria, Russula and Cortinarius the most abundant genera. Also dissimilarities on macrofungal communities, particularly, on abundance and diversity, were registered among plots. The influence of soil parameters...

197. Estudo da biodegradabilidade de bioplásticos numa cultura de ciclo curto - melão (Cucumis melo L. var.inodorus N.) - Saraiva, Artur Figueiredo
Due to the large amount of mulch films used in agricultural crops and to all the environmental problems related with their disposal, the biodegradable mulch films seems to be the best solution for replacing the conventional polyethylene mulches. The main goal of this work was to evaluate and compare the performance of biodegradable mulch films with the conventional polyethylene ones in muskmelon culture during two years. Beyond fruit productivity and quality, the impact of each plastic in the soil moisture and temperature were also assessed. Taking into account that there are no reported biodegradation studies realized in Portugal, it was also important to verify the biodegradability of this...

198. Indicadores de qualidade do solo em pomares de pereira "Rocha" - enrelvamento permanente versus mobilização - Rodrigues, Ana Raquel Martinho da Silva Felizardo
Different management systems induce modifications on ecosystems functioning, changing soil quality. In the context of growing concern for sustainability issues it becomes crucial to use physical, chemical and biological indicators able to identify effects on soil properties and processes. Such is the case of the Portuguese ‘Rocha’ pear (Pyrus communis L.) groves which represent an important economical value and specificity, mainly in the Centro NUT II region. Four orchards subjected to different management systems were selected (NT - no tillage with permanent natural cover crop; CT+E - tillage with manure incorporation; CT1 and CT2 - conventional tillage). Bulk density, exchangeable Ca2+, Mg2+, Na+ and K+, pH, extractable P and...

199. Otimização da produção de xilitol por estirpes de Debaryomyces hansenii em hidrolisado de Arundo donax - Bandeira, Filipa de Sousa
Arundo donax L. is a Mediterranean energy crop with a high potential for the production of bioenergy and added-value products. Nevertheless, its exploration within a biorefinery framework still requires further developments. This work aims to contribute for the development of a strategy to upgrade its hemicellulose fraction, by means of xylitol bioproduction. The raw material was milled and the influence of particle size on acid hydrolysis was studied. The composition of the hydrolysates and residual solids obtained did not differ significantly for the different fractions tested (< 2 mm). Three Debaryomyces hansenii strains were compared in chemically defined medium (CDM), and their...

200. Desenvolvimento de polpa de hortofruticolas: polpa verde com elevada bioatividade - Santos, Diana Isa de Oliveira
The present study consisted of (1) selection of pre-treatment adequate temperature/time binomial applied to the raw material, (2) optimization of fruit and vegetables pulps formulation, (3) selection of pasteurization conditions to be applied to the end product, (4) evaluation of untreated pulp (ST) and pasteurized pulp (TT) modifications, with utilization of transparent (T) and opaque (O) packaging, and maintained in refrigerated or in frozen conditions. Pulps were monitored for physicochemical, biochemical, microbiological, rheological and sensory parameters. The optimized pulp consists in an apple base (41 %) and pineapple (31 %), to which cabbage (8%), pumpkin (10%) and banana (10%) were introduced. The temperature/time binomial of the...

 

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