294 documents found, page 1 of 30
Lignin-based nanoparticles loaded with essential oils: potential for diabetic f...
Domingues, Joana Margarida Dias; Noro, Jennifer Martins; Novoa-Carballal, Ramón; Ribeiro, Artur; Monteiro, R.; Silva, C.; Felgueiras, Helena PradoEssential oils (EOs) play a pivotal role in wound healing as sustainable bioactive agents capable of counteracting infections and enhancing wound healing. Nevertheless, their application remains limited by challenges such as high volatility, photothermal resistance, and a tendency toward oxidative degradation. Encapsulation of EOs offers a promising strategy to overcome these issues by enhancing their chemical ...
Green synthesis of gold nanoparticles using the seaweed Fucus spiralis and thei...
Abreu, João; Ribeiro, Joana; Rocha, Verónica; Fernandes, Mário; Ferreira, Inês; Santos, Joana; Sárria Pereira de Passos, Marisa; Silva, C.The increasing prevalence of neurodegenerative diseases such as Alzheimer's disease (AD) underscores the need for effective therapeutic strategies. Nanotechnology can provide new tools to counteract neurotoxicity, namely by improving bioavailability of therapeutic molecules in the brain. Brown seaweeds, such as Fucus spiralis (FS), are rich in bioactive compounds with antioxidant, anti-inflammatory, cytoprotect...
Sustainable dyeing and functionalization of knitted cotton fabrics with algae e...
Oliveira, Helena S.; Santos, Joana; Ferreira, Tânia; Ribeiro, Artur; Silva, C.; Antunes, Joana C.; Bessa, João; Oliveira, Luís Miguel; Fangueiro, RaúlAlgae extracts have emerged as a sustainable and eco-friendly alternative to synthetic dyes and functional additives in the textile industry, particularly for dyeing and functionalizing of cotton fabrics. Herein, two types of water-soluble algae extracts from Arthrospira platensis and Porphyridium cruentum were characterized in terms of thermal, structural, and functional properties and used as dye and/or funct...
Exploring bio-based alternatives to cyclopentasiloxane: paving the way to promi...
Castro, Mariana; Roque, Catarina; Loureiro, Ana Isabel Sá; Guimarães, Diana Isabel Pereira; Silva, C.; Ribeiro, Artur; Cavaco-Paulo, ArturIn recent years, significant efforts have been made to identify suitable alternatives for silicones commonly used in daily cosmetic products. However, green alternatives have faced challenges in replicating the unique properties of silicone-based formulations, particularly cyclopentasiloxane, which continues to be widely used.This study explores the potential of six biosynthesized esters (heptyl heptanoate, hep...
Pioneering wound care solutions: triaxial wet-spun fibers with bioactive agents...
Miranda, Catarina Alexandra Fortuna Santos; Marinho, Elina Margarida Ribeiro; Rocha, Diana; Silva, C.; Silva, Maria Manuela; Schlapp-Hackl, IngeFiber-based constructs have been produced as an alternative to conventional dressings for the treatment of chronic wounds (CWs), showing good tenability, high surface area and regulable porosity. A commonly used technique for processing such dressings is wet-spinning, which involves precipitating a polymer solution into a coagulation bath containing a non-solvent of that polymer. This process produces fibers wi...
Lyocell/silver knitted fabrics for prospective diabetic foot ulcers treatment: ...
Tavares, Tânia Daniela Eugénio; Ribeiro, Artur; Bengoechea, Carlos; Rocha, Diana; Alcudia, Ana; Begines, Belén; Silva, C.; Antunes, Joana Isabel CostaDiabetic foot ulcers (DFUs) are a serious complication of diabetes, often resulting in infections and further health deterioration. Thus, the development of an approach combining different therapies in just one formulation to treat DFUs remains very challenging. Silver-plated polyamide fibers offer antimicrobial properties, while lyocell provides biodegradability, biocompatibility and moisture management abilit...
Biosynthesis of new amphiphilic esters with emulsifying properties for long-ter...
Roque, Catarina; Castro, Mariana; Castro, Tarsila Gabriel; Ribeiro, Artur; Silva, C.; Cavaco-Paulo, Artur; Noro, Jennifer MartinsIn this work, several amphiphilic compounds were successfully synthesized via lipase-catalysis: 2-(2-ethoxyethoxy)ethyloctanoate, 2-(2-ethoxyethoxy)ethyldecanoate, 2-(2-ethoxyethoxy)ethylpalmitate, (2-(2-ethoxyethoxy)ethyloleate) and (2-(2-ethoxyethoxy)ethyllinoleate). The reactions were carried out using octanoic acid, decanoic acid, palmitic acid, oleic acid, and linoleic acid, as the aliphatic compounds, and...
Novel textile dyeing process: The use of natural deep eutectic solvents (NADES)
Vieira, Bárbara Marques; Silva, Carla Manuela Costa; Silva, C.; Zille, Andrea[Excerpt] Textile dyeing is recognized for its substantial environmental impact [1, 2]. In response to this challenge, there is an increasing focus on eco-friendly alternatives, including the use of natural dyes derived from plants that not only provide coloration, but also impart unique functional properties to textiles[3]. However, these types of dyes typically exhibit poor color fastness when exposed to wash...
Mycotoxins in plant-based beverages: a study on occurrence in the Brazilian market
Kerstner, Francine; Oliveira, Crislei Ferreira de; Venâncio, Armando; Silva, C.; Buffon, Jaqueline GardaPlant-based beverages have become increasingly popular due to their health and sustainability appeal. However, raw plant-based ingredients are often associated with mycotoxin contamination. This study aimed to assess the presence of six mycotoxins aflatoxin B1, deoxynivalenol, 3-acetyldeoxynivalenol, 15-acetyldeoxynivalenol, ochratoxin A and zearalenone in plant-based beverages available on the Brazilian market...
Textile-based electrochemical sensor to detect ethanol using platinum nanoparti...
Costa, Nuna G.; Vanoni, Caio R.; Barros, Aline; Silva, C.; Gonzalez, Arturo; Antunes, Joana C.; Rocha, A. M.The development of textile-based electrochemical sensors for monitoring biomarkers in biological fluids, particularly alcohol, is a key area of research for real-time health monitoring. Alcohol, a widely consumed psychoactive substance, is a leading cause of fatal road accidents. This study explores the characterization and functionalization of a novel textile-based screen-printed electrode (SPE) for ethanol de...