Yaidelin Manrique, Associate Laboratory LSRE-LCM | November 28, 2019 – 17h00 | FEUP Sala B020 The supercritical fluid extraction (SFE) has an enormous interest; in this region, the physical properties promote the separation, the density is similar to the liquid, and the viscosity is in the same order of magnitude of that of gases. The supercritical fluid is widely used to extract solutes from the interior of solid matrices, and also for counter-current extraction of a liquid stream.

Cork corresponds to the bark of the cork oak (Quercus Suber L.), a hundred percent natural plant tissue, that is composed, in […]

Elena Gómez Costas, Associate Laboratory LSRE-LCM | November 21, 2019 – 17h00 | FEUP Sala B020 Flavonoids are components present on fruits and vegetables, which have several pharmacological properties, including anti-tumor, antioxidant, anti-inflammatory, among others. The extraction and separation of flavonoids from natural products is, therefore, important to their future applications.

The conventional processes used in the extraction of flavonoids include techniques as solid-liquid, liquid-liquid or supercritical fluid extraction, the main process to obtain flavonoids for biotechnological applications is hydroalcoholic extraction, using different solvents such as methanol or ethanol, being the yield and purity low, and the consumption of solvents […]

Isabel Maria Martins, Associate Laboratory LSRE-LCM | November 07, 2019 – 16h30 | FEUP Sala B024 The use of emergent technologies, such as microencapsulation, adds important gains and introduces new features and innovative properties in the products. The use of this methodology provides an important tool for several industries, enabling protection and controlled release of several active ingredients. The encapsulation of essential oils in a core-shell material or matrix has been investigated for various reasons, such as, protection from oxidative decomposition, evaporation or simply to support them. A large number of methods have been suggested for microcapsule’s production, in […]

Inmaculada Velo Gala, Associate Laboratory LSRE-LCM | October 17, 2019 – 17h00 | FEUP Sala B024 Water is one crucial natural resource since life on our planet depends on it. The transmission of serious diseases through pathogenic microorganisms in water is extremely common in the developing world and the antimicrobial resistance has increased globally. At the same time, pollutants can be found in ground and surface waters, even in tap water. In all cases all of them have to be removed to protect our water resources and to achieve drinking water quality. Therefore, the photocatalytic system has been […]

Raquel A Fernandes, Associate Laboratory LSRE-LCM | October 17, 2019 – 16h30 | FEUP Sala B024

Student Seminar in Chemical Engineeering (DEQ-FEUP) Heterogeneous photocatalysis appears as a green sustainable alternative to the industrial production of valueadded chemicals, operating under environmentally friendly conditions. Graphite-like carbon nitride (GCN) is an interesting semiconductor material, with metal-free character and absorption ability in the visible range spectrum. In the present work, GCN was obtained through co-polymerization of dicyandiamide with citric acid (CA). The photocatalytic performance of the photocatalysts (GCN-zCA) was tested both in the selective production of panisaldehyde (AAD) and hydrogen (H2) evolution, under […]