39 documents found, page 1 of 4
Peptide-keratin interactions for enhanced hair properties
Carvalho, José; Rodrigues, Ana Rita O.; Ferreira, Tiago; Gomes, Vânia; Pereira, Francisco; Martins, Cátia D. F.; Martins, MadalenaSummary Fusion peptides inspired by natural elastomeric proteins are fused to a keratin peptide (KP) and tested on damaged hair. Here, we report thermal and mechanical tests conducted on treated damaged hair in conjunction with the peptides physicochemical properties, resulting in a statistical multiparametric analysis. Among the parameters, the Youngs modulus and the keratin helix denaturation temperature show...
Cellulose formulations for hair modelling
Carvalho, José; Martins, Madalena; Cavaco-Paulo, ArturChemical processes to change the hair shape can lead to damaged hair fibre. Here, we propose benign formulations based on different types of cellulose using imidazolium ionic liquids (ILs) and a commercial serum as solvents. Formulations with concentrations at 3% and 0.5% of HEC (Hydroxyethyl cellulose) and CMC (Carboxymethylcellulose) showed the best results after washing, around 10% of curling effect. Images ...
The profession of research management and administration in Portugal
Barbosa, Cláudia; Borrego, Filipa; Costa, Teresa; Ferreira, Ana S.; Martins, Madalena; Moreira, Susana; Santos, José M.R.C.A.; Silva, José AvelinoThis chapter addresses the profession of research management and administration (RMA) in Portugal. It starts with a brief outline of the national research and innovation (R&I) ecosystem that contextualises the development of the profession. The RMA community is characterised and the expectations for the future of the RMA profession are summarised using data collected through a national online survey. It is posi...
Insights on the hair keratin structure under different drying conditions
Carvalho, José; Silva, Carla; Martins, Madalena; Cavaco-Paulo, ArturIt is important to understand the patterns of hair keratin integrity caused by drying methods. No previous information exists in the literature to compare different drying conditions needed to assess physical changes in the hair keratin. We used human hair for these experiments. We found that different drying conditions greatly influence the wearing fatigue of the hair fibers. Using a microfiber towel (80% poly...
Lipase-catalysed polymerization of eutectic mixtures
Freitas, David; Quesado, Vânia; Rocha, Diana; Noro, Jennifer Martins; Martins, Madalena; Cavaco-Paulo, Artur; Silva, C.Aiming to reduce the toxicity and operational costs often associated to chemical processes, the enzymatic synthesis is applied herein as a sustainable route for producing polyesters. The use of NADES components as a source of monomers for the synthesis of polymers through lipase-catalysed esterification in an anhydrous medium is detailed for the first time. Three NADES composed by glycerol and an organic base, ...
Relação entre o estado ponderal com a saúde do sono, atividade física e perceçã...
Oliveira, Leandro; Rossoni, Carina; Oliveira, Carolina; Martins, Madalena; Silva, Madalena; Martins, SofiaOs bombeiros são um grupo populacional que está sujeito a stress e pior qualidade do sono decorrentes da sua atividade profissional. Este trabalho teve como objetivo estudar a relação entre o estado ponderal com a saúde do sono, atividade física, perceção do consumo alimentar ou dietético e o stress entre os bombeiros. Este estudo piloto transversal decorreu durante o mês de maio de 2022. Para recolha de dados ...
NADES-based cork extractives as green ingredients for cosmetics and textiles
Rocha, Diana; Freitas, David; Magalhães, Jéssica; Marques, S. M.; Silva, Sónia Carina; Noro, Jennifer Martins; Ribeiro, Artur; Cavaco-Paulo, ArturThe demand for products based on natural ingredients is increasing among cosmetic and textile consumers. Cork extracts contain components of interest with special properties, including antioxidant, anti-inflammatory, and antibacterial activities, that might improve the effectiveness of cosmetic formulations currently on the market and may impart new characteristics to textiles. The main goal of this work was to...
Transnational cooperation in enhancing researchers’ wider employability: the TR...
Lees, James; Gorini, Lucrezia; Torjussen, Stian; Oliveira, Margarida; Pinto, Paula; Potes Barbas, Maria; Martins, Madalena; Jones, Melanie S.Purpose The purpose of this paper is to provide an example of best practice towards enhancing employability in the cross-sectoral labour market for doctorate-holders. This was achieved through an Erasmus+ KA2 (Strategic Partnership) skills development project which created a training programme (TRANSPEER) involving a multi-disciplinary cohort of researchers at a range of career stages, drawn from universities i...
Biotechnology of functional proteins and peptides for hair cosmetic formulations
Tinoco, Ana; Martins, Madalena; Cavaco-Paulo, Artur; Ribeiro, ArturCosmetics procedures and products combined with environmental insults and daily routines induce irreversible changes in hair. As result of damage, the hair loses some of its properties like strength, elasticity, and smoothness. Recent studies revealed the positive effects of protein-based cosmetics in providing protection to hair. Additionally, these cosmetic products have also shown a great ability to modify h...
Hair styling based on eutectic formulations with peptides
Carvalho, Diana; Ribeiro, Artur; Silva, C.; Martins, Madalena; Cavaco-Paulo, ArturEutectic-based formulations were developed aiming to modify the shape and improve the mechanical properties of Asian hair. These formulations comprised a eutectic mixture (choline chloride and urea) as a solvent, a natural reducing agent (l-cysteine), and a decapeptide. The treatment of Asian hair with the eutectic-based formulations increased the resistance of hair to mechanical wear by about 10\\% when compar...