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UTL Repository Universidade Técnica de Lisboa (12.371 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 735

1. 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...

2. 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...

3. 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...

4. 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...

5. 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...

6. Discovering the Cubango-Okavango reiver 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...

7. Identificação de marcadores SSR e de SNPs em medronheiro (Arbutus unedo L.) por sequenciação massiva paralela - Fazenda, Pedro Miguel Jesus
The strawberry tree (Arbutus unedo L.) is native to the Mediterranean region. The use of molecular markers in this species has been limited to the use of RAPDs, ISSRs as well to the cross-amplification of SSRs from other Ericaceae. In this work, we developed a protocol for extracting nuclear DNA from the strawberry tree and performed partial next-generation sequencing of the Arbutus unedo L. genome using the "Ion Torrent" (Life Technologies) platform. The next-generation sequencing resulted in 198,856 sequences ("raw data") with an average size of 123 bp, which were uploaded to the NCBI database "Sequence Read Archive" (SRA) with the accession number: SRX341237. Data analysis led to...

8. Determinação do teor de fibra alimentar em produtos hortofrutícolas - Santos, Joana Rosa
The development of healthy products, easy to transport and consume, is a growing need. This study's main objective was to analyze the dietary fiber in fruit and vegetables IV and V range using specific analytical methodologies. Fruit and vegetable pulps (V range) were used, as well as minimally processed carrot (IV range) subjected to different pre-treatments : heat treatment, UV radiation, ripping and their combinations - followed or not by storage at 5°C for 7 days. The pulps with pear base proved to be considerably richer in dietary fiber than the apple pulps. These results are due to higher pear dietary...

9. Respostas para investigar e inovar na área agro-alimentar. Horizonte 2020 - António, Marina Isabel Dias Marques
The Horizon 2020 Programe aims to strengthen the position of the main leadership of the European Union (EU), in matters such as Science, Innovation and Research. This program will cover the period from 2014 to 2020, and will have some new features compared to previous funding programs, the most important and expected - simplification. Simplification of participation rules, simplification regarding the bureaucracy, simplification of an entire project that is primarily designed to integrate our European researchers, making them return and supporting their ideas. In particular, the H2020 covers issues of agriculture and food security in two of their three pillars, promoting an...

10. O desafio de abastecimento descentralizado de água: avaliação do potencial de dessalinização por energia solar - Branco, Telma Filipa Aires
Coping with water scarcity is one of the world biggest challenges, and in this sense, desalination has assumed an important role as an alternative solution for water supply. However the high energy consumption is a main drawback of this technology. The use of renewable energy as an alternative energy supply can contribute to a more environmentally sustainable desalination process. This work aims to illustrate the different available desalination technologies, and understand how these technologies can be combined with renewable energy sources, with more emphasis on humidification - dehumidification technology using solar energy. Since solar desalination is more applicable for decentralized production of...

11. Adequabilidade da energia solar para a produção autónoma de água dessalinizada - Fernandes, Ângela Soares Ramos
The issue of water scarcity has been felt with more intensity in the arid and semi-arid regions. These regions are characterized by climate variability and recurrent droughts, affecting the socio-economic development of these areas. In remote areas with limited water resources, desalination is used as a primary source for drinking water supplies to communities. Between the various technologies available in desalination, inverse osmosis is the most used technology for drinking water production. Photovoltaic solar energy solves the issue of electrification in rural areas, becoming an added value since it allows achieve energetic autonomy for the conventional system. This paper aims to assess the...

12. Gestão de chorume de uma exploração pecuária através da co-digestão com resíduos de fruta - Rodrigues, Liliana Isabel Dionísio
Due to the increase of animal production throughout the world, also increase the amount of dairy cattle manure and consequently the environmental impacts associated with their inadequate management. One of the treatment techniques more adequate is the anaerobic digestion, which allows obtaining two valorizable products: biogas which can be used as a source of energy and a digested efluent that can be used as agricultural fertilizer. This work aims to study the potential use of a cattle farm effluent on AD. Therefore, it was necessary to collect data relating to the flow analysis and then, make the experimental design according to the needs inherent to this type...

13. Caracterização de enzimas proteoliticas produzidas por bactérias de origem marinha - Vieira, Helena Soraia Fernandes
Proteases from marine microorganisms have received increased attention due to their advantages compared to other sources. The objetive of this work was the characterization of an extracellular protease produced by a marine strain. The bacterial growth was performed in a liquid culture media, containing bacteriological peptone (1, 2 and 4%), yeast extract (0.5%) and sugar (0.5% saccharose or glucose). Bacterial growth and enzymatic activity were followed for 50 h. Best results were obtained with saccharose, yeast extract and 2% of peptone. The optimum temperature and pH were 60ºC and 6.5, respectively. However, another proteolytic activity maximum was recorded at pH 7.6. The protease was stable at 40ºC for approximately...

14. Production of fish protein hydrolysates by a marine proteolytic strain - Godinho, Irina Sofia Marques
The preparation of fish protein hydrolysates by a fermentative process is an alternative to classical preparation using added proteolytic enzymes, taking advantage of the wide spectrum of proteolytic enzymes produced by microorganisms and increasing the complexity of the peptide mixture obtained. Thus, the objective of this work was to prepare fermentative protein hydrolysates (FPH) from a commercial cod protein hydrolysate (CPH) using an indigenous marine proteolytic strain. The bacterial growth was performed in liquid culture media, containing three concentrations of CPH (1, 2 and 4%), yeast extract (0.5%) and sucrose (0.5%), with continuous shaking, at 30 ºC for 24, 50...

15. Avaliação da atividade antifúngica de quitinases de macieira - Cabanas, Andreia Sofia Pereira
This work focused on the expression of cloned heterologous chitinase genes in order to produce the corresponding recombinant proteins. Constructs harbouring the three chitinase genes (C525, C209, C203) cloned in GS115 and KM71H strains were expressed in culture medium with methanol as carbon source at 30ºC. Culture growth and total soluble protein content were assessed periodically. The resulting secretomes were dialised, freeze-dried and used in assays of biological efficacy regarding inhibition of mycelial growth and spores germination of Botrytis cinerea. First assays were conducted at 20ºC with 1 mg of total protein in the initial solution. Both strains were analysed,...

16. Novas pragas agrícolas na Ilha de S. Nicolau - Cabo Verde: Tuta absoluta (Meyrick) (Lep.:Gelechiidae) e Bactrocera invadens (Drew, Tsuruta & White) (Dipt.: Tephritidae) - Duarte, Melissa Vanize dos Anjos da Costa
In the last two years, invasive species that are pests of agricultural crops were introduced in some of the islands of the archipelago of Cape Verde with a high economic impact in agriculture. These include the South American tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechidae) and Bactrocera invadens Drew, Tsuruta & White (Diptera: Tephritidae). In order to assess the presence of these pests on the island of São Nicolau, attractive traps were settled in four areas with banana trees (Ribeira Prata, Fajã, Maiama and Campo de Preguiça) to monitor the fruit fly. Tests were also installed in six tomato fields for...

17. Avaliação do risco de fungicidas para os organismos aquáticos - representatividade da sensibilidade das espécies padrão para outras espécies aquáticas não-visadas - Bernardino, Joana Raquel Bispo
Studies done with insecticides and herbicides show that SSD (Species Sensitivity Distribution) curves based on more sensitive taxonomic groups can be used to determine the environmental quality limits for species protection. The main objective of this study was to verify the relative sensitivities of taxonomic groups towards fungicides’ with different modes of action (MOA), and which species are the most appropriate to use as standard test species for fungicides in the context of environmental risk assessment of fungicides to aquatic ecosystems. Data could be collected for 86 different fungicides, for which Trel (relative tolerance) values were calculated. Data was divided according to the taxonomic groups: crustaceans, fish, primary...

18. Formação de um painel de provadores para diferenciação da bebida do café - Silva, Luciana Cristina Cardoso
This work had the objetive of forming a panel of qualified tasters in order to detect and recognize existing differences between various types of coffees. It consisted of a selection phase (Phase I) and a training phase (Phase II), after the recruitment of the interested people. On Phase I three sensory tests were carried out for solutions with basic tastes: Simple Identification Test, Combined Tastes Test and Triangular Test. A minimum score of acceptance was established for the candidates to be accepted to the following phase. On Phase II two sensory tests on coffee were carried out: Identification of Tastes and Triangular Test. A minimum score (67%) was determined...

19. Planeamento de restauro de corredores fluviais na bacia do Rio Grande - Mestre, Débora Jesuíno
According to the Water Framework Directive (WFD), which requires Member States to take measures in order to protect, enhance and restore the superficial water bodies, looking to attain a good water quality status, the work at hand aims at assessing the ecological status of the Rio Grande water bodies, by implementing the Predicted Ecological State methodology. This methodology allows the division of the fluvial ecosystem in sections with homogenous features, the identification of its degradation level through the measurement of local anthropogenic pressures and plan rehabilitation measures and actions so as to achieve the goal set by the WFD.

20. Relatório integrador da actividade profissional - Duarte, João Gomes de Matos
This thesis constitutes a summary of my work for the past eight years. Given the different subjects that I have been involved, I selected three major lines of work to expose in this thesis, which are subdivided in four Chapters: Chapter I: “Descriptive Curriculum vitae” containing a brief presentation of the work developed, constituting a more descriptive cv, with a clear description of the projects I have been involved, techniques that I have become acquainted and a brief explanation of my responsibilities during this period. In Chapter II, entitled “Preliminary analysis of the antimicrobial protein content of the Spurge flax...

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