UTL Repository Universidade Técnica de Lisboa
(9.709 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 629
1.
Estudo do comportamento de residuos orgânicos no solo - Morillo Sierra, Alberto
The food production is not only one of the main pillars of the Society but also, undoubtedly one of the most important. The final consumer is increasingly aware of the importance of food and, as such, requires for their benefit, greater quantity, variety and quality of food, and that food producers have to adapt without fail, innovating and improving their production techniques.
Therefore it is necessary to call upon to the use of low-cost techniques which allow a quality and economically profitable sustainable production.
Once the environmental degradation is increasing, and intensive crops are known to increase that impact, it is a...
2.
Influência do clima nas variações estacionais e interanuais do indice de vegetação de diferença normalizada (NDVI) no montado português - González Garcia, Isabel
Nowadays the climate change makes more necessary the study of ecosystem dynamics. The Portuguese montado is an ecosystem with very particular characteristics, because is a combined system with pastures and forest, managed by men, and depends on this manage to continue. More than economic value, montado is very important system with a big biodiversity and landscape quality. For this study was propose to study about the seasonal variation of montado, since 2000 to 2012, using remote sensing and vegetation index as tools to analyze the response of montado to different environmental factors, as the precipitation, temperature and relative humidity. The...
3.
Presença ou ausência do Callithrix aurita em fragmentos de mata atlântica: formando uma estratégia de conservação da biodiversidade para o Município de Sapucaia -RJ - Brasil - Oliveira, Ana Beatriz Lacerda de
The Atlantic Forest is one of the biomes with the highest biodiversity in the world. Included among
the 25 global hotspots due to its endemism, has today, 35% of plant species in Brazil, and many
of these species are threatened with extinction. Compared to other countries and even other
continents will, the biodiversity of the Atlantic Forest region is of global importance, being
essential to their conservation.
Brazil has the greatest diversity of World monkeys (48%), and, most endemic country, 2/3 of this
amount occurring in the Atlantic Forest. Due to its wild habitat, have suffered great pressure by
fragmentation in Atlantic Forest region, restricting habitats of...
4.
Gestão e conservação de ecossistemas fluviais e zonas húmidas. Restauro e cooperação como instrumentos de gestão. Relatório integrador da atividade profissional - Mendes, Ana Isabel da Silva
Human activity upon river ecosystems has contributed to their natural decay. The ecological
quality of river systems depends on the human activities developed in the surroundings. The
need for ecosystem restoration to mitigate the adverse effects of human activities led to the
development of new management models. The implementation of river ecological restoration
can only be fully achieved through cooperation between nations, indeed, nature conservation
and management does not know frontiers.
This report seeks to demonstrate that within the authors academic and professional background
I acknowledged relevant experience in the scientific management and conservation of natural
resources. Another important goal of this report was to gather information related...
5.
Projeto de campos de golfe municipais. Aplicação prática no município de Santarém - Ferreira, Ana Filipa Roque de Jesus
In Portugal, for many, golf is still considered an elitist sport. This is due to the fact that in our country, until
recently there were only top golf courses, usually associated with resorts where the fee that is paid for a round of
golf this modality becomes inaccessible to much of the population. Such is not the case in other countries, such
as UK, France or even our neighboring Spain, where there are infrastructure less showy, but with usage fees
considerably lower than the municipal golf courses. Presently there are two municipal golf courses operating in
the country, one in Cantanhede and the other in...
6.
Qualidade do fruto vs. qualidade do sorbet. Estudo do efeito do tempo e temperatura de conservação do sorbet - Hipólito, Cátia Vanessa Gonçalves
The aim of the present dissertation was study the fruits that are used to make sorbets and implication of these in sorbets quality as well as their evolution during storage. For this, the fruits chosen were orange, lemon, mandarin, strawberry, melon and mango, each represented by two different cultivar or origin, which were characterized according to physical, chemical and sensorial parameters in order to determine which variety/origin produce the best quality sorbets. The sorbets obtained from each of the raw materials were stored for 21 days at three different temperatures (-18, -15 and -12 ºC), proceeding to evaluation of their...
7.
Efeito da origem do cacau na sua qualidade comercial, funcional e sensorial. O caso do cacau catongo de São Tomé e Principe e do Brasil - Veríssimo, Ana João Mendes
This work aims to study various types of seeds, fermented, unfermented and toasted from cocoas around different countries in order to evaluate their characteristics in terms of quality, physic-chemical and sensory type.
On study, are four samples of Sao Tome and Principe, three samples from Colombia, one Brazilian and one Ghana, making part of types of cocoas as Criollo (sub-type: Amelonado, Amelonado Hybrid), Forastero (sub-type: Catongo) and Trinitario.
The cocoas physic-chemical quality evaluation proceeding was made to determine the average mass of 100 seeds, as the, moisture content, the fat content, the titratable acidity and pH, the total phenols, the triacylglycerols and...
8.
Café arábica de Cabo Verde e de Timor-Leste: estudo da qualidade do café comercial e da bebida - Ribolhos, Inês Antunes
Coffee is one of the leading products marketed globally, beeing a source of income for many producing countries, such as East Timor and Cape Verde.
This study characterizes two coffees from distinct origins and evaluates the influence that several conditions of production and post-harvest technology hold over the final product.
The study includes physical and chemical characterization of Fogo Island and East Timor coffees, on a few parameters: weight of 100 grains, grain size, defects, ash, phenols, global acidity, caffeine, trigonelline and chlorogenic acids. It was also evaluated the sensory profile and the effect of roasting on the variation of volume, mass,...
9.
Avaliação da eficiência de campo em operações agrícolas com recurso à tecnologia GPS - Tirapicos, António Maria Carvalho
In the past, the estimation of field efficiency for agricultural machinery based on measurements of area and time was difficult and time consuming using a stopwatch during operation. Currently with the GPS system one can obtain this information much faster and in a simpler manner.
This study tested a methodology for the estimation of the field efficiency of agricultural operations using the GPS.
We measured working time of several agricultural operations and subsequently compared with data available in the literature. Since there are few empirical studies conducted on this subject the comparisons were mainly restricted to the data collected from literature; it...
10.
Inactivação térmica de diferentes espécies de leveduras de alteração de vinhos - Morais, Inês Elisa Carrão
Wine spoilage yeasts are one of the major concerns of oenology. This work was
based on comparative study of thermal resistance on five strains of spoilage yeast species
most likely to contaminate wine: Saccharomyces cerevisiae; Saccharomycodes ludwigii,
Schizosaccharomyces pombe; Zygosaccharomyces bailii; Dekkera bruxellensis. These
species were incubated in standard red wine (ethanol 12% (v/v), sugar<2g/L, pH=3,5), of
four lethal temperatures between 30ºC to 42ºC. The values of the decimal reduction time (D)
allowed the determination of the Z-values in order to evaluate the thermal resistance of each
strain. The specie with the highest thermal resistance was Z. bailii (Z=17,5°C), while the
others had lower Z-values: 4,2°C (S. pombe)...
11.
Concentração de vinho tinto por nanofiltração. Estudo das modificações quimicas e sensoriais - Garcia, Francisco Santos Silva
In the present work it was study the concentration of red wine by a technology designated Nanofiltration. In wines from two regions, Alentejo and Douro, were tested four different degrees of concentration (5%, 10%, 15%, and 20%) and was made a subsequent assessment of the analytical and sensory consequences in the concentrated wines.
Were analyzed in the laboratory the samples corresponding to different degrees of concentration, determining among other parameters, the Alcoholic Content, Total Dry Extract, Total Acidity, Total Phenols Index and Total Anthocyanins.
Analytical results suggested that Total Dry Extract, Total Acidity, Total Phenols Index, Color Depth and Reducing Sugars, showed...
12.
Avaliação ecohidrológica de caudais modificados e de caudais ecológicos em troços de rios modificados - Martins, João Pedro Fernandes Farinha de Oliveira
This study aimed to improve our understanding of the ecohydrological characteristics of environmental and modified flows in Portuguese rivers considered Heavily Modified Water Bodies (HMWB), using the Indicators of Hydrologic Alteration (IAH) method.
For a given set of "heavily modified river sections", this study did the characterization and analysis of present flow regimes observed, natural flow regimes, and ecological flow requirements simulated by the method of INAG, DSP (2002). Based on Indicators of Hydrologic Change, the determination of the deviations from natural regimes was performed for the present hydrological regimes: both modified and ecological.
The analysis of indicators of hydrologic alteration, based...
13.
Monitorização de desreguladores endócrinos em águas de rede e águas residuais por SPE-UPLC-ESI-MS/MS. Empresa Portuguesa das Águas Livres (EPAL) - Carvalho, Ana Rita Martins
Water is an essential factor in the life and environmental issues and is a current topic of extreme importance to human health. Endocrine disrupters affect the endocrine system, significantly altering the vital functions in living beings. Thus, it is essential to undertake the monitoring of aquatic systems that exposure to and bioaccumulation of these compounds is mitigated. The objective of this study is to monitor the presence of ten EDC in 60 water samples distributed by EPAL and in 24 samples of wastewater from a treatment plant wastewater, using a method of analysis previously implemented in the company's central laboratory....
14.
Estudo da biodegradabilidade de bioplásticos numa cultura de ciclo longo - morango - Costa, Raquel Alexandra Cardoso
The use of plastic mulch in agriculture had its beginning in the middle of last century and since then its use has been intensified and the costs of send this residue to appropriate final destination lead it often to be left or burned in open field, causing huge environmental concerns. The biodegradable mulch films, which can be incorporated in the soil at the end of the crop appear as a possible solution for this problem.
The goal of this work was to test the biodegradability of 5 plastic mulches, made from biodegradable polymers, comparing to conventional Polyethylene (PE).
The biodegradability was tested...
15.
Efeitos da aplicação de calor e da radiação UV-C na qualidade de polpas refrigeradas de hortofrutícolas - Silva, Catarina Gomes da
Pasteurization conditions, optimized by response surface methodology, were dependent
upon the tested formulations: P_Amarela [Rocha pear (50%): Pineapple (50%)] e P_Vermelha
[Rocha pear (66%) Strawberry (30%), Beetroot (4%): Lemon juice (1.5%)], for the timetemperature
binomials of 95 ºC/10min and 90 ºC/10min, respectively. After processing,
pasteurized pulps showed significant levels of reduction of mesophilic load (> 2 Log cicles)
as well as POD inactivation (>99%) without causing changes in colour, pH, soluble solids
content and phenolic content. These results were validated for P_Amarela and P_Vermelha, where
again high decontamination levels (4 Log cicles) and POD inactivation, were achieved
gathered with high sensorial acceptance. The levels of soluble solids content,...
17.
Implementação de modelos de produção em PGF. Aplicação de um caso de estudo no Concelho de Ponte de Sôr - Sousa, Diogo d'Andrade de Oliveira
The scope of the present work is to demonstrate the use of growth and yield models in forestry management practice, namely in the elaboration of a forestry management plan. The SUBER model, a growth and yield model for cork oak stands in Portugal was used to simulate the development of two cork oak stands in the area of Ponte de Sôr.
By using data collected from forest inventory, the model SUBER v5.0 allowed to simulate the evolution of the cork oak stands for the next 30 years, according to several management alternatives defined in order to evaluate the effect of different...
18.
Ocorrência e prevenção do risco de pesticidas em águas superficiais e subterrâneas potencialmente usadas para consumo humano - Geraldes, Ana Lúcia Viana Rocha
This study intended to characterize and prevent the occurrence of pesticides found in waters potentially used for human consumption in Continental Portugal, particularly occurrences above the value 0.1 μg/L - maximum value permitted by law, in faucet, for individual pesticides and 0.5 μg/L for the total of pesticides.
To characterize the available information, data from the networks of ground and surface water of the National System of Information on Hydric Resources (SNIRH) were selected. Subsequently, the pesticides with concentrations above the value 0.1 μg/L were identified.
From the existing stations in SNIRH, 258 are a part of the surface water quality network...
19.
Optimização dos testes de germinação para monitorização das colecções de plantas autóctones conservadas em bancos de sementes - Silva, Carla Antónia Mendes
With the aim to contribute to the optimization of germination tests to monitor the seed collections of native plants conserved in seed banks, germination percentage, germination rate (T50) and lenght of the germination period (T10-90) were evaluated in 16 species studied on four temperatures 15°C, 20°C, 25ºC and 15º/25 ºC.
The species were subject to pre-germination treatments to break dormancy: cold stratification (30 days) at 4°C in Scrophulariaceae and Umbelliferae, mechanical scarification in Malvaceae, and Fabaceae, and thermal scarification (115ºC, 10 min.) in Cistaceae. Seeds were incubated in a photoperiod of 8 hours light/16 hours dark.
According to results, the species germinated...
20.
Gestão multifuncional no Perímetro Florestal da Cabeça Gorda e Salvada em Beja no contexto da certificação florestal - Henriques, Maria Manuel Marques Freire Cardoso Laboreiro
The Cabeça Gorda and Salvada forest is an area approximately 320 hectares
of pine, oaks, eucalyptus, scrub, and grassland, under public administration and
subject to partial forestry regime since 1960. In 2009 an agreement was signed
between the National Forest Authority and the two owners, the parish councils of
Cabeça Gorda and Salvada, in order to transfer management responsibility and
administration from the first organization to the other two.
This thesis is a contribution to establish a framework to multifunctional forest
management of that area whose primary function is to protect water and soil and
provide recreation conditions to the populations living in the surroundings. Some
proposals are presented:...
1.
