24 documents found, page 1 of 3
Sources and distribution of organic matter and polycyclic aromatic hydrocarbons...
Mil-Homens, Mário; Gonçalves, Sofia; Cortés, Alejandro; van Drooge, Barend L.; Stigter, Henko de; Grimalt, Joan O.; Cordeiro, Lívia; Santos, Miguel M.Total organic carbon (Corg), total nitrogen (Ntot), Corg/Ntot, δ13Corg, δ15N, calcium carbonate (CaCO3), and grain size were analyzed in 70 surface samples and 19 short cores from the southwestern Portuguese shelf. Perylene and USEPA-16 PAHs were quantified in a subset of these samples. The findings suggest that organic matter derives from a mix of terrestrial and marine sources, outlined by Corg, Ntot, and iso...
Ozone membrane contactor for tertiary treatment of urban wastewater: Chemical, ...
Presumido, Pedro Henrique; Ribeirinho-Soares, Sara; Montes, Rosa; Quintana, Jose B.; Rodil, Rosário; Ribeiro, Marta; Neuparth, Teresa; Santos, Miguel M.A membrane ozone contactor, operated under continuous mode, was applied to promote the tertiary treatment of urban wastewater (UWW), targeting the removal of contaminants of emerging concern (CECs), bacterial disinfection, and toxicity reduction. This system relies on the homogeneous radial distribution of ozone (O3) in the reaction zone by "titration" through a microfiltration borosilicate tubular membrane, wh...
Spatial distribution and temporal trends of butyltin compounds (TBT, DBT & MBT)...
Mil-Homens, Mário; Almeida, C. Marisa R.; Dias, Sofia; Soares, Warley; van Gaever, Piet; de Stigter, Henko; Santos, Miguel M.; Santana, AndréSpatial patterns and temporal trends of the butyltin compounds tributyltin (TBT), dibutyltin (DBT), and mon-obutyltin (MBT) were investigated in a set of sediment samples collected along the SW Portuguese continental shelf. This region did not reach the Good Environmental Status (GES) in accordance with the Marine Strategy Framework Directive (MSFD) during a first evaluation carried out in 2012. Overall, MBT an...
A novel ceramic tubular membrane coated with a continuous graphene-TiO2 nanocom...
Presumido, Pedro Henrique; Santos, Lucrécio F. dos; Neuparth, Teresa; Santos, Miguel M.; Feliciano, Manuel; Primo, Ana; Garcia, HermenegildoThis work presents a ceramic tubular membrane coated with a continuous graphene-TiO2 nanocomposite thinfilm for contaminants of emerging concern (CECs) removal from synthetic and real matrices in single-pass flow-through operation. Microfiltration ceramic membranes were coated in situ with graphene (G)-TiO2-P25 nano-composite using two different methods: Membrane type A - TiO2-P25 incorporated in the G prepara...
Etidronate-based organic salts and ionic liquids: In vitro effects on bone meta...
Teixeira, Sónia; Santos, Miguel M.; Branco, Luís C.; Costa-Rodrigues, JoãoBisphosphonates are a class of drugs widely used for the treatment of several pathologies associated with increased bone resorption. Although displaying low oral bioavailability, these drugs have the ability to accumulate in bone matrix, where the biological effects are exerted. In the present work, four mono- and dianionic Etidronate-based Organic Salts and Ionic Liquids (Eti-OSILs) were developed by combinati...
Boosting antimicrobial activity of ciprofloxacin by functionalization of mesopo...
Mora, Blanca de Juan; Filipe, Luís; Forte, Andreia; Santos, Miguel M.; Alves, Celso; Teodoro, Fernando; Pedrosa, Rui; Ribeiro Carrott, ManuelaMesoporous silica nanoparticles (MSNs) are very promising nanomaterials for treating bacterial infections when combined with pharmaceutical drugs. Herein, we report the preparation of two nanomaterials based on the immobilization of ciprofloxacin in mesoporous silica nanoparticles,either as the counter-ion of the choline derivative cation MSN-[Ch][Cip]) or via anchoring on the surface of amino-group modified MS...
Boosting antimicrobial activity of ciprofloxacin by functionalization of mesopo...
Juan Mora, Blanca de; Filipe, Luís; Forte, Andreia; Santos, Miguel M.; Alves, Celso; Teodoro, Fernando; Pedrosa, Rui; Carrott, Manuela RibeiroMesoporous silica nanoparticles (MSNs) are very promising nanomaterials for treating bacterial infections when combined with pharmaceutical drugs. Herein, we report the preparation of two nanomaterials based on the immobilization of ciprofloxacin in mesoporous silica nanoparticles, either as the counter-ion of the choline derivative cation (MSN-[Ch][Cip]) or via anchoring on the surface of amino-group modified ...
Using zebrafish embryo bioassays combined with high-resolution mass spectrometr...
Wilson, Estibali Wilkie; Castro, Verónica; Chaves, Raquel S.; Espinosa, Miguel; Rodil, Rosario; Quintana, José Benito; Vieira, Maria NatividadeSeveral studies show that many water bodies in developing countries are increasingly affected by anthropogenic pressure, such as agricultural activities, domestic and industrial wastewater. However, data is scarce in several of such countries, including Panama. Thus, in this work, the ecotoxicological status of selected rivers in Panama with distinct input sources were evaluated using the zebrafish (Danio rerio...
Assessment of water quality parameters and their seasonal behaviour in a Portug...
Chaves, Raquel S.; Salvador, Daniel; Nogueira, Paulo Jorge; Santos, Miguel M.; Aprisco, Paula; Neto, Célia; Cardoso, Vítor; Benoliel, Maria J.Water quality monitoring is a fundamental tool in the management of freshwater resources. The purpose of monitoring is to provide meaningful quality data for local action planning and catchment-wide decision making. The assessment of water quality is crucial to guarantee the efficient operation of the Water Treatment Plants (WTPs), promoting health conditions and contributing for a more sustainable urban water ...
Alendronic Acid as Ionic Liquid: New Perspective on Osteosarcoma
Teixeira, Sónia; Santos, Miguel M.; Fernandes, Maria H.; Costa-Rodrigues, Joao; Branco, Luís C.Herein the quantitative synthesis of eight new mono- and dianionic Organic Salts and Ionic Liquids (OSILs) from alendronic acid (ALN) is reported by following two distinct sustainable and straightforward methodologies, according to the type of cation. The prepared ALN-OSILs were characterized by spectroscopic techniques and their solubility in water and biological fluids was determined. An evaluation of the tox...