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Helena P. Felgueiras
University of Minho
Organic chemistryMaterials scienceWound healingPolymerAntimicrobial peptides
47Publications
11H-index
279Citations
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Publications 47
Newest
#1M. A. Silva (University of Minho)H-Index: 1
Last. M. T. Pessoa de Amorim (University of Minho)H-Index: 8
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Abstract Polymer nanoparticles (NPs) composites are rapidly gaining attention due to their high potential for application in several technological fields. On one hand, polymers contribute to balance the attractive magnetic and van der Waals forces that act on NPs and thus reduce their agglomeration. On the other hand, NPs can bring into the composites their inherent properties as nanosized objects. In this work, hematite NPs were blended with cellulose acetate (CA) polymer and thin nanocomposite...
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#1Tânia D. Tavares (University of Minho)H-Index: 2
#2Joana C. Antunes (University of Minho)H-Index: 6
Last. Helena P. Felgueiras (University of Minho)H-Index: 11
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The increased resistance of bacteria against conventional pharmaceutical solutions, the antibiotics, has raised serious health concerns. This has stimulated interest in the development of bio-based therapeutics with limited resistance, namely, essential oils (EOs) or antimicrobial peptides (AMPs). This study envisaged the evaluation of the antimicrobial efficacy of selected biomolecules, namely LL37, pexiganan, tea tree oil (TTO), cinnamon leaf oil (CLO) and niaouli oil (NO), against four bacter...
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#1Joana C. AntunesH-Index: 6
Last. Helena P. FelgueirasH-Index: 11
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Chronic wounds (CW) have numerous entry ways for pathogen invasion and prosperity, which further damages host tissue and hinders tissue remodeling. Essential oils (EOs) exert quick and efficient antimicrobial (AM) action, unlikely to induce bacterial resistance. Cinnamon leaf oil (CLO) is a well-studied EO with strong AM properties. In this work, CLO was added to chitosan (Ch) and polyvinyl alcohol (PVA) solutions. Ch is a natural cationic polysaccharide with antibacterial, anti-inflammatory and...
#1Francisco Claudivan da Silva (UFRN: Federal University of Rio Grande do Norte)
#2Helena P. Felgueiras (University of Minho)H-Index: 11
Last. Andrea Zille (University of Minho)H-Index: 21
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A polyurethane (PU)-based eco-composite foam was prepared using dog wool fibers as a filler. Fibers were acquired from pet shops and alkaline treated prior to use. The influence of their incorporation on the PU foams’ morphological, thermal, and mechanical properties was investigated. The random and disorganized presence of the microfibers along the foam influence their mechanical performance. Tensile and compression strengths were improved with the increased amount of dog wool microparticles on...
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#1Helena P. Felgueiras (University of Minho)H-Index: 11
#2Marta Albertina Teixeira (University of Minho)H-Index: 2
Last. M. Teresa P. Amorim (University of Minho)H-Index: 3
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5 CitationsSource
#1Natália Cândido Homem (University of Minho)H-Index: 4
#2Catarina S. Miranda (University of Minho)H-Index: 1
Last. Helena P. Felgueiras (University of Minho)H-Index: 11
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Essential oils (EOs) have been considered as a potential alternative to antibiotics in the treatment of several diseases, due to its antimicrobial properties. For instance, the tea tree essential oil (TTO), extracted from the Melaleuca alternifolia, has been reported to exhibit analgesic, antiviral, antibacterial, antifungal, antiprotozoal and anti-inflammatory properties. Likewise, the cinnamon leaf essential oil (CLO), has exhibited excellent antioxidant and antibacterial properties. However, ...
#1Helena P. Felgueiras (University of Minho)H-Index: 11
#2Marta Albertina Teixeira (University of Minho)H-Index: 2
Last. M. Teresa P. Amorim (University of Minho)H-Index: 3
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Wound care is a growing industry that lately has been facing multiple challenges due to the increasing health care costs, aging of population, appearance of antibiotic-resistant pathogens, and rise in the incidence of chronic diseases. Unlike acute wounds which heal in a predictable amount of time following the stages of healing, chronic wounds (CW) often fail to progress past the inflammatory phase, increasing costs and healing time. Bioactive dressings that incorporate drugs/antibiotics or bio...
#1Catarina S. Miranda (University of Minho)H-Index: 1
#2Ana R. Ribeiro (University of Minho)H-Index: 22
Last. Helena P. Felgueiras (University of Minho)H-Index: 11
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Nowadays, tissue engineering is described as an interdisciplinary field that combines engineering principles and life sciences to generate implantable devices to repair, restore and/or improve functions of injured tissues. Such devices are designed to induce the interaction and integration of tissue and cells within the implantable matrices and are manufactured to meet the appropriate physical, mechanical and physiological local demands. Biodegradable constructs based on polymeric fibers are des...
1 CitationsSource
#1Ana Isabel F. Ribeiro (University of Minho)H-Index: 4
#2Martina ModicH-Index: 11
Last. Helena P. Felgueiras (University of Minho)H-Index: 11
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Polyvinylpyrrolidone-coated silver nanoparticles (PVP-AgNPs) dispersed in ethanol, water and water/alginate were used to functionalize untreated and dielectric barrier discharge (DBD) plasma-treated polyamide 6,6 fabric (PA66). The PVP-AgNPs dispersions were deposited onto PA66 by spray and exhaustion methods. The exhaustion method showed a higher amount of deposited AgNPs. Water and water-alginate dispersions presented similar results. Ethanol amphiphilic character showed more affinity to AgNPs...
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#1Marta Albertina Teixeira (University of Minho)H-Index: 2
#2Maria C. Paiva (University of Minho)H-Index: 18
Last. P Helena
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Wound healing requires careful, directed, and effective therapies to prevent infections and accelerate tissue regeneration. In light of these demands, active biomolecules with antibacterial properties and/or healing capacities have been functionalized onto nanostructured polymeric dressings and their synergistic effect examined. In this work, various antibiotics, nanoparticles, and natural extract-derived products that were used in association with electrospun nanocomposites containing cellulose...
1 CitationsSource
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