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Engineering novel phenolic foams with lignin extracted from pine wood residues ...
Melro, Elodie; Duarte, Hugo; Antunes, Filipe E.; Valente, Artur J.M.; Romano, Anabela; Norgren, Magnus; Medronho, BrunoPhenolic foams are typically produced from phenolic resins, using phenol and formaldehyde precursors. Therefore, common phenolic foams are non-sustainable, comprising growing environmental, health, and economic concerns. In this work, lignin extracted from pine wood residues using a "green" levulinic acid-based solvent, was used to partially substitute non-sustainable phenol. The novel engineered foams were sys...
Proton conducting electrolytes composed of chondroitin sulfate polysaccharide a...
Santos, Filipe M.; Barbosa, Paula C.; Pereira, Rui F.P.; Silva, M. Manuela; Gonçalves, Helena M R; Nunes, Sílvia C.; Figueiredo, Filipe L.Novel electrolytes composed of chondroitin sulfate A (CSA) and citric acid (CA) have been prepared using a clean, safe, and fast route. These electrolytes exhibit different physical-chemical properties, depending on the amount of CA. For X > 82.3%, where X is the mass ratio, in %, of CA/(CA + CSA), whitish polycrystalline powders result. Lower amounts of CA leads to the production of translucent, amorphous film...
Proton conducting electrolytes composed of chondroitin sulfate polysaccharide a...
Santos, Filipe M.; Barbosa, Paula C.; Pereira, Rui F.P.; Silva, M. Manuela; Gonçalves, Helena M.R.; Nunes, Sílvia C.; Figueiredo, Filipe L.Novel electrolytes composed of chondroitin sulfate A (CSA) and citric acid (CA) have been prepared using a clean, safe, and fast route. These electrolytes exhibit different physical-chemical properties, depending on the amount of CA. For X > 82.3%, where X is the mass ratio, in %, of CA/(CA + CSA), whitish polycrystalline powders result. Lower amounts of CA leads to the production of translucent, amorphous film...
Effect of cyclodextrins and pH on the permeation of tetracaine: supramolecular ...
Teixeira, Raquel S.; Veiga, Francisco J.B.; Oliveira, Rita; Jones, Stuart A.; Silva, Sérgio M.C.; Carvalho, Rui A.; Valente, Artur J.M.This work provides a new insight on fundamental principles of the interaction mechanism between two forms of tetracaine – a potent local anesthetic – both in neutral (TC) and ionized (TC+) states, with beta- (b-CD) and hydroxypropyl-beta-cyclodextrin (HP-b-CD), and how such interactions affect the transport of tetracaine, at different concentrations, across a model membrane. The kinetics and mechanism of TC rel...