A5044471911- Membrane Separation Technologies
- Graphene and Nanomaterials Applications
- Electrohydrodynamics and Fluid Dynamics
- Nanomaterials for catalytic reactions
- Nanoparticles: synthesis and applications
- Fermentation and Sensory Analysis
- RNA and protein synthesis mechanisms
- Membrane Separation and Gas Transport
- Pancreatic function and diabetes
- Phytochemicals and Antioxidant Activities
- Mitochondrial Function and Pathology
- Amyotrophic Lateral Sclerosis Research
- Nanopore and Nanochannel Transport Studies
- Membrane-based Ion Separation Techniques
- Polysaccharides and Plant Cell Walls
- RNA Research and Splicing
- High voltage insulation and dielectric phenomena
- Advanced Cellulose Research Studies
- Genetic Neurodegenerative Diseases
- Thyroid Cancer Diagnosis and Treatment
- Ginkgo biloba and Cashew Applications
- RNA modifications and cancer
Instituto Politécnico de Lisboa
2014-2025
University of Lisbon
2014-2025
Universidade do Porto
2018-2023
i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto
2022-2023
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
2019
The winemaking process generates a large amount of residues such as vine shots, stalks, grape pomace, and wine lees, which were only recently considered for exploitation their valuable compounds. purpose this work was to investigate the performance nanofiltration recovery phenolic compounds, with bioactive capacity like antioxidant, from red pomace extract. Four membranes compared in study-three cellulose acetate (CA series: lab-prepared by phase inversion) one commercial (NF90). All...
Membrane processes are a reality in wide range of industrial applications, and efforts to continuously enhance their performance being pursued. The major drawbacks encountered related the minimization polarization concentration, fouling, biofouling formation. In this study, silver nanoparticles were added casting solutions cellulose acetate membranes order obtain new hybrid that present characteristics inherent nanoparticles, namely antibacterial behavior leads reduction. A systematic study...
Abstract The present work investigated the impact of ultrafiltration (UF) and nanofiltration (NF) membranes on recovery fractionation polyphenolic compounds polysaccharides from Sangiovese Cabernet Sauvignon wine lees. A laboratory-made flat-sheet membrane in cellulose acetate (CA400-38) was used UF treatment lees; three (CA316, CA316-70, CA400-22) a polyamide commercial (NF90) were NF All characterized terms hydraulic permeability rejection toward references solutes; performances measured...
Mixed matrix asymmetric membranes were prepared by the addition of silver nanoparticles to cellulose acetate/acetone/formamide casting solutions with ratios acetone/formamide varying from 1.44 2.77 prepare ultrafiltration/nanofiltration covering a wide range hydraulic permeabilities. Binding polymer is revealed through comparison FTIR spectra acetate and Ag/cellulose membranes. In later, there decrease ratio between bands intensities at 2,000–2,500 cm −1 . Membrane surface charge mixed...
The antibacterial properties of cellulose acetate/silver nanoparticles (AgNP) ultrafiltration membranes were correlated with their integral asymmetric porous structures, emphasizing the distinct features each side membranes, that is, active and layers surfaces. Composite prepared from casting solutions incorporating polyvinylpyrrolidone-covered AgNP using phase inversion technique. variation ratio acetone/formamide content resulted in a wide range structures different hydraulic...
Integral asymmetric cellulose acetate (CA) membranes were casted by phase-inversion with formamide varying content - 22, 30 and 34% as pore promoter. These membranes, CA-22, CA-30 CA-34, analyzed infrared spectroscopy in attenuated total reflection mode (ATR-FTIR) to investigate the porous membrane matrix influence on polymer/water/solute interactions selective ultrafiltration of salts. The covered a wide range hydraulic permeabilities, from 3.5 81.0 kg.m-2.h-1.bar-1, molecular weight...
ABSTRACT Cellulose acetate (CA)–silver (Ag) nanocomposite asymmetric membranes were prepared via the wet‐phase inversion method by dispersing polyvinylpirrolydone‐protected Ag nanoparticles in membrane casting solutions of different compositions. Silver synthesized ex situ and added to solution as a concentrated aqueous colloidal dispersion. The effects dispersion addition on structure selective permeation properties studied comparing nanocomposites with silver‐free materials. composition...
The processing of cheese whey pre-concentrated by reverse osmosis is carried out through ultrafiltration in diafiltration mode to produce protein concentrates with lower lactose content be incorporated beverages. initial and contents are 2.13g/100g 13.22g/100g, respectively.The commercial membranes, GR95PP, supplied Alfa Laval, Denmark, were characterized terms a hydraulic permeability 1.21 l/(h∙m^2∙bar) molecular weight cut-off 7500 Dalton. permeation tests plate frame Lab-Unit 20 from...