3122035 documents found, page 311696 of 312204
The Role of Polyfunctionality in the Formation of [Ch]Cl-Carboxylic Acid-Based ...
Crespo, Emanuel A.; Silva, Liliana P.; Martins, Mónia A.R.; Bülow, Mark; Ferreira, Olga; Sadowski, Gabrielle; Held, Christoph; Pinho, SimãoAiming at providing an extensive characterization of the solid−liquid equilibria (SLE) of deep eutectic solvents (DESs), the phase diagrams of nine eutectic mixtures composed of choline chloride ([Ch]Cl) and (poly)carboxylic acids, commonly reported in the literature as DESs, were measured experimentally. Contrarily to the behavior reported for eutectic mixtures composed of [Ch]Cl (hydrogen-bond acceptor, HBA) ...
Estimação e identificabilidade dos parâmetros do motor de indução trifásico
Leite, Vicente; Araújo, Rui Esteves; Freitas, Diamantino SilvaEste trabalho apresenta a estimação dos parâmetros do motor de indução trifásico e a sua identificabilidade, através da aplicação de técnicas de modelização paramétrica e identificação. Estas técnicas são desenvolvidas com a construção de modelos baseados na descrição matemática do motor, simplificada através da utilização da transformada de Park ou do método dos fasores espaciais, com posterior linearização. A...
Nutritional value and bioactive compounds characterization of plant parts from ...
Petropoulos, Spyridon Α.; Pereira, Carla; Tzortzakis, Nikolaos; Barros, Lillian; Ferreira, Isabel C.F.R.In the present study, the nutritional value of the edible parts (immature capitula) of cardoon plants was evaluated, while further analyses were carried out in order to assess antioxidant properties and phenolic compounds composition of the various plant parts and seed oils. Cardoon capitula (heads) were a rich source of carbohydrates, with the main detected free sugar being sucrose, as well as of macro- and mi...
Estimating hydroxytyrosol-tyrosol derivatives amounts in cv. Cobrançosa olive o...
Marx, Ítala; Casal, Susana; Rodrigues, Nuno; Veloso, Ana C.A.; Pereira, J.A.; Peres, António M.The estimation of hydroxytyrosol-tyrosol derivatives amounts in olive oils through the analysis of olive pastes collected during malaxation is of utmost relevance due to the relationship with the oils' health claim regarding the protection of blood lipids from oxidative stress. Olive pastes were collected during the industrial extraction of cv. Cobrançosa oils (0–60 min; 22–34 °C). Total phenolic contents of pa...
Optimizing the time of incubation of an anion exchange membrane inserted into t...
Rodrigues, M.A.; Arrobas, MargaridaAnn anion exchange membrane (AEM) is a solid organic polymer that has a positive electrostatic charge, which is saturated by the addition of a counter ion, such as bicarbonate (HCO3), before use. In the presence of an anion, such as NO3 HCO3 will be exchanged for a stoichiometrically equivalent amount of that anion.
Catalytic wet air oxidation of butyric acid solutions using carbon supported ir...
Gomes, Helder; Figueiredo, José; Faria, JoaquimThe search for new advanced cleanup catalytic technologies imparted to catalytic wet air oxidation (CW AO) a recrudescent interest in recent years. At the present, more than 100 plants using CW AO are operative worldwide, mainly for treatment of streams from petrochemical, chemical, pharmaceutical and textile industries. CWAO can be used either for complete oxidative degradation, or as pre-treatment for biologi...
Relationship between small ruminants behaviour and landscape features in Northe...
Castro, Marina; Castro, José; Gómez Sal, AntonioThe small ruminant production system in Northeastern Portugal is an extensive activity based on the exploitation of spontaneous resources. The shepherds direct their flocks on daily grazing itineraries over different land use types. These circuits differ hugely throughout the year in organization and duration. The places visited and time spent in each land use type depend on the environmental conditions and nee...
Análise experimental e numérica do escoamento vertical ascendente bifásico ar-á...
Matoba, Gláucio KenjiO estudo apresentado nesta disserta c~ao de mestrado e constitu do por 2 partes principais: a primeira onde se apresenta uma instala c~ao experimental e o estudo experimental e num erico efetuado; a segunda parte se apresenta o dimensionamento e instala c~ao de uma plataforma met alica que permite a utiliza c~ao segura do equipamento para escoamentos bif asicos. A instala c~ao experimental permite v arias con g...
Planning a digital marketing agency called maddness marketing
Akter, ShewlyThis thesis aims to develop a business plan for a digital marketing agency called “Maddness Marketing”, specialising in short-form content marketing and advertisements like TikTok, YouTube shorts and Instagram reels for real estate agencies. In the literature review, research will be conducted to learn more about this topic, such as the real estate market in Portugal, the impact of social media on the real esta...
Insights into the phenolic composition and in vitro bioactivity of cardoon capi...
Mandim, Filipa; Pinela, José; Marcelino, Sandra Andreia; Dias, Maria Inês; Barracosa, Paulo; Ivanov, Marija; Soković, Marina; Santos-Buelga, CelestinoThe capitulum constituents (stigma, corolla, bracts, pappus, and receptacle) of seven cardoon cultivars were studied for their polyphenolic composition and bioactive properties. Fifteen phenolic compounds were identified, secoiridoid, secoxyloganin, and apigenin-O-hexuronoside in higher concentrations. The bracts had the highest concentration of phenolic compounds, and the corolla had the greatest variety. The ...