222 documents found, page 1 of 23
Enhancing plastic waste recycling: evaluating the impact of additives on the en...
Aguiar, Mariana I. S.; Sousa, Andreia F.; Teixeira, Gabriel; Tavares, Ana P. M.; Ferreira, Ana M.; Coutinho, João A. P.While (bio)degradation of polymers is a recognized challenge, the influence of additives on this process remains poorly understood. Their presence in commercial polyethylene (PE) may inhibit the degradation process or complicate the recycling. This study aims to develop an enzymatic degradation process for post-consumer high-density polyethylene (HDPE). The HDPE degradation was performed using laccase from Tram...
Enhancing plastic waste recycling: Evaluating the impact of additives on the en...
Aguiar, Mariana I.S.; Sousa, Andreia F.; Teixeira, Gabriel; Tavares, Ana P.M.; Ferreira, Ana M.; Coutinho, João A. P.While (bio)degradation of polymers is a recognized challenge, the influence of additives on this process remains poorly understood. Their presence in commercial polyethylene (PE) may inhibit the degradation process or complicate the recycling. This study aims to develop an enzymatic degradation process for post-consumer high-density polyethylene (HDPE). The HDPE degradation was performed using laccase from Tram...
Hydrodynamics of cholinium chloride-based aqueous biphasic systems (ABS): A key...
Jorge, Alexandre M. S.; Coutinho, João A. P.; Pereira, Jorge F. B.Aqueous biphasic systems (ABS) have been widely studied for extraction and purification processes. Although they are considered biocompatible, amenable, and sustainable separation platforms, their application on an industrial scale remains impractical without proper scaling and integration into existing processes. To better understand the hydrodynamics of ABS formation, three cholinium chloride ([Ch]Cl)-based A...
Unveiling the use of hydrophobic eutectic solutions as task-specific solvents t...
Kholany, Mariam; Schaeffer, Nicolas; Macário, Inês P. E.; Veloso, Telma; Caetano, Tânia; Pereira, Joana L.; Dias, Ana C. R. V.; Coutinho, João A. P.Haloarchaea make up a class of untapped marine microbial resources that constitute a promising source of valuable compounds with unique characteristics. Bacterioruberin is a C50 carotenoid produced by haloarchaea that possesses interesting antioxidant properties and bioactivities relevant to the food and cosmetic industries. As a substitute for the conventional organic solvents used in the extraction of nonpola...
Separation of natural compounds using eutectic solvent-based biphasic systems a...
Chagnoleau, Jean-Baptiste; Rocha, Inês L. D.; Khedher, Ryan; Coutinho, João A. P.; Michel, Thomas; Fernandez, Xavier; Papaiconomou, NicolasA study on the formation of ternary biphasic systems composed of heptane, 1-butanol or ethyl acetate and type III or type V deep eutectic solvents based on levulinic acid and choline chloride or thymol was carried. Binodal curves and densities and phase compositions of phases in equilibrium for seven systems are reported. The partition coefficients of six natural compounds, namely quercetin, apigenin, coumarin,...
Coarse-grain molecular dynamics simulation framework to unravel the interaction...
Pérez-Sánchez, Germán; Costa, Filipa M.; Silva, Gonçalo M. C.; Piñeiro, Manuel M.; Coutinho, João A. P.A coarse-grained molecular dynamics (CG-MD) framework, based on the MARTINI 3.0 model, was developed to characterise the interactions between surfactants and oil-silica substrates to resemble chemical enhanced oil recovery (EOR) processes. Previous computational studies, at the atomistic scale, addressed interactions between surfactants and oil over diverse surfaces. Even though simulations provided significant...
Tailored pretreatment of serum samples and biomarker extraction afforded by ion...
Rosa, Marguerita E.; Mendes, Maria S. M.; Carmo, Eduarda; Conde, João P.; Coutinho, João A. P.; Freire, Mara G.; Silva, Francisca A.Prostate cancer serum biomarkers, such as the U.S. Food and Drug Administration (FDA)-approved prostate specific antigen (PSA), are valuable markers of diagnosis, response to treatment and disease progression. Despite the expected benefits of using PSA to better manage the mortality and morbidity associated to prostate cancer, sample complexity and interference within analysis make its quantification in serum a...
Towards the sustainable extraction and purification of non-animal proteins from...
Kopilovic, Bojan; Valente, Ana I.; Ferreira, Ana M.; Almeida, Mafalda R.; Tavares, Ana P. M.; Freire, Mara G.; Coutinho, João A. P.Advances towards the development of a sustainable economy must address the exploitation of bio-based products combined with the use of greener solvents and manufacturing processes that can preserve natural resources and the environment. To address the growing demand for proteins, their production must focus on non-animal sources, such as vegetal biomass and respective residues/waste, and on the use of sustainab...
Combining eutectic solvents and food-grade silica to recover and stabilize anth...
de Souza Mesquita, Leonardo M.; Sosa, Filipe H. B.; Contieri, Letícia S.; Marques, Priscilla R.; Viganó, Juliane; Coutinho, João A. P.Concentrated in the skins of red grapes are the anthocyanins, the primary colorants responsible for the fruits' reddish-purple color. These colorants are recognized for their significant antioxidant properties and potent nutraceutical and pharmaceutical ingredients. Nevertheless, their widespread use is compromised by the (i) need for more efficient yet sustainable downstream processes for their recovery and (i...
Salt effects on the solubility of aromatic and dicarboxylic amino acids in water
Aliyeva, Mehriban; Brandão, Paula; Gomes, José R. B.; Coutinho, João A. P.; Held, Christoph; Ferreira, Olga; Pinho, Simão P.The salt effect on the solubility of the amino acids l-aspartic acid, l-glutamic acid, l-tryptophan, and l-tyrosine, seldomly found in the literature, was studied at 298.2 K, in aqueous solutions of KCl and (NH4)2SO4, for salt concentrations up to 2.0 mol·kg−1. In this concentration range, both salts are salting-in agents for glutamic acid and aspartic acid, with a stronger effect induced by (NH4)2SO4. Regardin...