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UTL Repository Universidade Técnica de Lisboa (13.177 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 1 - 20 de 749

1. Dinâmica do arsénio no sistema solo-água-arroz - Carvalho, João da Cruz
Paddy rice (Oryza sativa L.) is a staple food consumed worldwide especially in Asia and one of the major sources of dietary arsenic, an important carcinogen. The concentration of arsenic in rice is becoming an important concern in Portugal. Soil and water samples from several paddy fields were analyzed regarding a range of geochemical parameters in order to assess their importance to the concentration of arsenic in rice grains. There was a correlation between the content of arsenic in grains and the available fraction of arsenic and the organic carbon in the soil. Some cytogenetic differences were observed in root...

2. Utilização de redes de ensombramento para monda de bagos em uva de mesa - Nóbrega, Hugo Paulo Vale
The major difficulty in the production of seedless table grapes is the excessive fruit-set and the reduced berry size, decreasing the quality of production. Different types of berry and flower thinning, with GA3 application with different doses and shading were studied. 100% of light intensity reduction, during flowering led to a almost complete berry drop in ‘Thompson Seedless’. When 95% of shading was imposed beginning at 50% and 100% bloom, the final number of berries was reduced in 62% and 70%, respectively, leading to a less compact bunch. The decrease of light intensity, led to a reduction of 48% in...

3. Problemas associados à gestão de Nesidiocoris tenuis (Hemiptera: Miridae) em tomateiro em modo de produção biológico: amigo ou inimigo ? - Duarte, Gonçalo Nuno Abraços Henriques Gomes
Nesidiocoris tenuis Reuter spontaneously colonizes tomato crops along the Mediterranean basin. This insect is both beneficial and harmful since it feeds on pest species but also on the tomato plant itself. The phytophagous feeding originates plant damage, mostly necrotic rings in stems and flower abortion. To understand the behavior of N. tenuis on tomato, population vertical distribution on the plant and the relation between N. tenuis and the abundance of prey, in particular whiteflies,and the damage caused to the plant, were observed. Both nymphs and adults of N. tenuis preferred the uppermost part of the plant and their density decreased towards...

4. Avaliação do desempenho das zonas húmidas construídas: estudo de caso Barroca d'Alva - Botequilha, José Ricardo Martins
Constructed Wetlands (CW) are suitable for rural areas with high environmental and cost-benefits compared with conventional treatment systems for wastewater due to its high construction cost and need for continuously technical supervision. This alternative technology consists on man-made system that reproduces the processes that occur during the water purification in natural wetlands. The wastewater flows through the porous medium under the surface of the beds which are planted with macrophytes ensuring the removal of pollutants. The present work aimed to study the effect of seasonal variation on the removal of pollutants during spring and summer in CW of Barroca D’Alva. This work...

5. Efeitos inibitórios do hidroximetilfurfural na fermentação alcoólica: avaliação por citometria de fluxo - Baptista, Cátia Vanessa Rodrigues
The growing importance of biofuels, such as bioethanol, in today's society as an alternative to oil, was the driving force of this work. The lack of information about the effect of a major alcoholic fermentation inhibitor present in lignocellulosic hydrolysates towards a yeast of the genus Saccharomyces (the most widely used in bioethanol production) justifies the interest and relevance of this study that aim at assessing the inhibitory effect of hydroxymethylfurfural (HMF) during alcoholic fermentation by the yeast Saccharomyces carlsbergensis. The physiological effects evaluation was performed by multiparametric flow cytometry by detecting changes in the cytoplasmic membrane, lipids composition and oxygen...

6. Valorização de resíduos agro-industriais para a produção biológica de hidrogénio - Lopes, Sofia Helena Lewis
Biohydrogen (bioH2) production through anaerobic fermentation has the advantage of the possibility to use waste as substrate becoming an attractive alternative from both economic and environmental viewpoint. In this study, it was developed a microbiological anaerobic process to produce hydrogen by a strain of bacterium Enterobacter aerogenes using as a substrate, Jatropha curcas seed cake. In this context, the effects of the application of a thermal pretreatment and the increase of residue initial concentration on the process yields were studied. Therefore, batch assays were performed using Jatropha curcas seed cake (2,5gVSsubstrate/Lfermentation medium) submitted to thermal treatment in an autoclave during 15 and 30 minutes and the results obtained were compared...

7. Composição bioativa de cenoura em função da época de colheita e do processamento mínimo - Silva, Elisa Gonçalinho
From the bioactive composition characterization of cv. Nantes carrot considering tissue type (peel, cortex and vascular tissues) and harvest season (winter vs. summer), it was concluded that both factors affect significantly this composition. Carrots from the summer harvest showed to have about four times higher total phenolic and carotenoid contents than the winter ones. The cortex is the most representative carrot tissue (71-82%) and holds higher contents of total phenolics (49-69%) and carotenoids (78-85%) than the remaining tissues – peel and vascular tissues. Therefore, the cortex is the tissue that contributes the most toward carrots’ total antioxidant capacity (61-72%), mainly...

8. Relatório Integrador da atividade profissional - Pascoal, Carolina Gaspar
This report is intended to comply with the Standards presented by the Scientific Council of the Superior Institute of Agronomy, from the University of Lisbon, for Development of a Professional Activity’s Report in accordance with paragraph 3 of 3rd article of the Second Cycle Study’s General Regulation leading to a Master’s degree, approved by Order (extract) n. 10544/2011, published in the Official Gazette, 2nd Series, n. 160, August 22, 2011, for "Pre-Bologna" undergraduates. Accordingly, the information included in the report was organized with the aim of showing the acquired skills through academic education, further training and professional experience. To this...

9. Relatório integrador da atividade profissional. Mercados agrícolas e fileiras agroalimentares - Silva, Maria Inês Lince Malta Vacas Morgado
This report is intended to comply with the Standards presented by the Scientific Council of the Institute of Agronomy, Technical University of Lisbon, for Development of Professional Activity Report Integrator in accordance to paragraph 3 of art. 3 of the General Regulation of the Second Cycle Study leading to the degree of Master, approved by Order (extract) n. 10544/2011, published in the Official Gazette, 2. Series, n. 160, August 22, 2011, for ‘Pre-Bologna’ degrees and describes in detail the professional activities developed by the author. Accordingly, the information contained in the report was organized with the aim of showing his...

10. Estudo genético e funcional de genes HESP envolvidos na patogenicidade de Hemileia vastatrix (Ferrugem alaranjada do cafeeiro) - Gonçalves, Ana Cristina Fernandes dos Santos
Coffee leaf rust, caused by Hemileia vastratrix, is a disease with a major impact on the economy of coffee production. The H. vastatrix – coffee interaction follows the gene for gene theory, where a resistance (R) protein located in the host cytoplasm recognizes an avirulence (Avr) protein secreted by the fungal haustoria, triggering the hypersensitive response. The major goal of this study was the identification of H. vastatrix candidate effectors, namely Avr genes. To this end, Expressed Sequence Tags (ESTs) from 454-pyrosequencing, generated during previous projects of the Centro de Investigação de Ferrugens do Cafeeiro (Oeiras), were used. The MEME...

11. Desenvolvimento de uma ferramenta de avaliação do risco para estabelecimentos de restauração - Sousa, Emanuel Moniz
This study aimed to obtain a risk assessment tool, for services, quick to apply, analyze, and allowed to establish, by based way, the frequency of supervision actions by the responsible entity, allowing a greater action of the entities nearest the establishments whose risk is higher depending on the classification obtained in the end. Thus, developed a checklist that the result is crossed with the estimated risk for the activity in order to obtain the level of risk of the establishment and therefore the periodicity proper for the inspections. Results are introduced through a summary table and a radar chart, thereby facilitating...

12. Caracterização dos produtores de plantas aromáticas e medicinais em modo de produção biológico em Portugal - Morujo, Nuno Filipe Claro
This paper concerns a study on the production of aromatic and medicinal plants (MAP) in Portugal. These species have always been considered as interesting in cultural, social, culinary and medicinal but only recently acquired an economic interest. Global growth of organic farming and market demand in this direction led to the production of specific interest in MAP organic production (MPB). In the particular case of Portugal, are known two ways to get these plants: cultivation and spontaneous gathering. These two types of production associated with the soil and climate of the country makes it a potential producer of these species, although even today the import of plants...

13. Sistemas de condução em pereira Rocha. Análise produtiva, qualitativa e económica - Comporta, Ana Sofia Ferreira
With the aim of evaluating production, qualitative and economic aspects of four training systems during 2010, at Peral, Cadaval, 4-yr-old ‗Rocha‘ pear trees (Pyrus communis L.) grafted on Sydo and trained as vertical axis (1.0 x 4.0 m), open tatura trellis (0.8 x 4 m), palmette (1.2 x 4.0 m) and solaxe (1.0 x 4.0 m) were monitored. The highest canopy volume and the lower pruning weight were recorded in the tatura system. No significant differences were observed among systems concerning flower bloom and fruit setting. Production in 2010 was 54.0, 53.7, 54.9 e 38.2 tones.ha-1 for tatura, vertical axis,...

14. Influência da rega subsuperficial e gota-a-gota na utilização da água , qualidade e produção em pereira (Pyrus communis L.) Rocha. Estudo preliminar - Gonçalves, Marta Filipa Dores Martins
With the aim of comparing the physiologic response, the quality of the fruits and water productivity of a pear orchard irrigated by two different irrigation systems, a field trial was conducted on a 4 year old „Rocha‟ / Sydo pear orchard, irrigated by surface drip and subsurface drip irrigation, during the year 2009/2010. There are no differences in the flower bloom and fruit setting, sugar content and acidity of the fruits between the two irrigation systems, but the surface drip irrigation produced a larger percentage of fruits > 70 mm than subsurface drip irrigation. The subsurface system had lower soil...

15. Ensaios com alternativos de madeira e taninos enológicos em vinho tinto. Efeitos na composição química e análise sensorial - Suvac, Serghei
The aim of this study is to evaluate the effects of oak alternatives in red wine. The alternatives have been used: tannins of control enological tannin, tannin and extract of oak wood "Dialog", used doses were minimum, average and maximum. After one month aging in 10L bottles chemical composition and sensory analysis were evaluated. At the beginning of evaluation general analysis of wine were determined (% vol, pH, SO2, sugar, etc.) and analyzes which linked to phenolic compounds, (intensity and color tone, total anthocyanins, coloured anthocyanins, ionization index, polymeric pigments, total pigments, polymerization index, index of total polyphenols, total phenols, and...

16. Hidráulica agrícola e desenvolvimento rural. Estudo de projectos. Relatório integrador e crítico da actividade profissional - Russo, António Manuel Terrão
Consulting on agricultural hydraulics and rural development has been the main activity of the author in the last two decades. A large part of the professional career was devoted to studies and design of hydraulic infrastructures for the establishment of irrigation in Portugal. The recent years of his professional career focused on the internationalization of consulting services by drafting general plans, technical advises, design projects, training and specialized technical assistance to farmers and technicians. Angola and Cape Verde have been the stage of action. The present document was written with two main objectives: to obtain a Master of Science degree and to share with the community some...

17. Avaliação das propriedades gelificantes da farinha de chia (Salvia hispanica L.). Desenvolvimento de novas aplicações culinárias - Ramos, Susana Cristina Ferreira
Due to its high nutritional value and technology capacities, chia seeds (Salvia hispanica L.) are considered a promising food for the development of functional products, based on its gelling properties. Characterization of the gelling ability and optimal concentration of chia flour used in formulation of new products, was performed by analysis of physical and chemical properties of the flour and respective gels for different ranges concentrations and different processing conditions. The result of chemical composition of chia flour reinforces the already widespread knowledge about its nutritional value, increasing their potential for the development of new functional products. Considering the raw material used, the...

18. Desempenho produtivo e reprodutivo de vacas Holstein-Frísia em comparação com os respectivos cruzamentos com vermelha sueca e Montbéliarde - Andrade, Susana Carina Neto
A comparison of 70 crossbred cows Montbéliarde (MB) x Holstein Friesian (HF), 70 Swedish Red (SR) x HF and 70 pure HF, for fertility, dystocia, postpartum diseases, body condition score (BCS) , somatic cell count (SCC), and 305 days projected milk, fat and protein production during their first 2 lactations was conducted. The cows studied were from two farms and data collection period was from late June until the end of December 2012. Although the HF was more early mating, crossbreed cows produced better results for fertility than the HF cows. The MBxHF cows showed better results for dystocia and...

19. Influência de um fogo florestal na qualidade da água da Ribeira de São Domingos localizada na Região Oeste de Portugal - Meneses, Bruno Miguel do Carmo Santana
Forest fires are responsible for several environmental problems, especially for polluting watercourses. In this dissertation we intend to evaluate the changes occurring in the physical and chemical constitution of water of São Domingos stream (crossing the municipalities of Lourinhã and Peniche, Portugal), in particular pH and nutrient content variation, related to surface runoff from the burnt area of the Cezaredas plateau, where a forest fire occurred at July 19th, 2012. Thus, water samples were collected in three points strategically chosen along this stream (one upstream of the burnt area and two downstream, one of the last being located immediately after...

20. Discovering the Cubango-Okavango river basin. A geomorphological description of the Angolan rivers and its fish assemblages and the ecological implications of future human development - Preiswerk, Sebastian Benedikt Coimbra
The years fly by but the African continet and its enourmos richness remains an undiscovered treasure. The Angolan province Cuando-Cubango includes one of the biggest watersheds of the African continent, the Cubango-Okavango river basin. One of the rivers where most parts remains untouched and in a pristine form. Ongoing water resources planning intends to regulate large parts of the basin and to intensify human uses. In order to better understand and to analize ecological responses of the Angolan part of this river basin, three main steps were conducted: The first one was to develop and to validate a geomorphological zonation in order to understand the evolution and...

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