Browsing by Author "Barreiro, Filomena"
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- 14th International Chemical and Biological Engineering Conference (CHEMPOR-2023): Book of AbstractsPublication . Queiroz, Ana; Peres, António M.; Ribeiro, António E.; Barreiro, Filomena; Ferreira, Olga; Brito, Paulo; Pinho, SimãoWelcome to the 14th edition of the International Chemical and Biological Engineering Conference (ChemPor-2023) held at Bragança Polytechnic University (Instituto Politécnico de Bragança, IPB), Portugal, from 12 to 15 of September, 2023. This triennial conference, organized by a Portuguese Higher Education Institution and the Portuguese Engineers Association (Ordem dos Engenheiros), gathers experts from the chemical and biological engineering areas and related subjects to exchange knowledge and technological experiences within the academic, industrial, scientific, and technological communities. ChemPor-2023 addresses these research fields in different topics, from green chemistry to engineering education, always envisaging a sustainable development. The etymology of the word “conference”, from the Medieval Latin, means literally “bring together”. This 14th edition comes with a two-year delay following the global sanitary crisis since only a full inperson meeting could fulfill this purpose. ChemPor-2023 encompasses a gathering in a vivid, enlightening, and convivial way, and this hiatus did not limit this spirit or its objectives. The conference aims to celebrate creativity, diversity, and friendship among participants, promoting ideas exchange and fruitful interactions. We have circa 300 delegates from 4 continents, and your active participation is highly acknowledged. The general relevance of ChemPor-2023 is addressed in a variety of settings, including biorefinery, biotechnology, energy and environment, innovative materials, creation and design of novel reaction and separation processes, always foreseeing industrial applications for a sustainable shaping of the future. This edition includes an opening lecture by Jorge Calado in the immense but much less explored area of ArtScience, and an Honor Session dedicated to Alírio Rodrigues for his academic and scientific contributions, particularly regarding IPB. Besides, the conference includes 11 invited lectures from internationally recognized scientists and experts from the industry, 107 oral presentations distributed in 27 sessions, and 135 posters in two dedicated sessions. A session exclusively dedicated to companies and another for Ph.D. studies in industrial environments are to be highlighted. The “Professor Almiro e Castro” award, established in 2014 by PARALAB – Equipamentos Industrial and Laboratory SA, to recognize the scientific merit of a Portuguese professor or researcher in the last three years in the fields of Chemical and Biological Engineering, and related areas, will be announced at the closing of the conference. In that ceremony, the two best posters and the best oral communication awards by young scientists will also be granted. We want to reinforce our deepest appreciation to all the participants, but also to the members of the Honor, Scientific, and Local Organizing Committees for their invaluable contribution to the conference and acknowledge the institutional support of Instituto Politécnico de Bragança, Ordem dos Engenheiros, Centro de Investigação de Montanha, Sociedade Portuguesa de Química, and Câmara Municipal de Bragança. Expressing enormous gratitude is mandatory to all our Sponsors and associated scientific journals and publishers. Nothing could have been possible without all of you! Finally, our best wishes for success for the next ChemPor organization.
- Advancing Pickering emulsions with natural-based solid dispersion particles: Particle screening and design of pectin-based emulsionsPublication . Rezende, Stephany; Santamaria-Echart, Arantzazu; Ribeiro, Andreia; Dias, Madalena M.; Barreiro, FilomenaGiven the evolving trends in consumption, Pickering emulsions are emerging as a promising solution for functional and healthier foods, highlighting the need to diversify particle stabilisers. This study assessed the potential of curcumin-based solid dispersions (SDs) prepared with natural polymers (pectin, maltodextrin, Arabic gum, potato starch, and k-carrageenan) as Pickering stabilisers. Among these, pectin-curcumin SDs (contact angle = 48.0 ± 3.6◦) demonstrated effective emulsion stabilisation, as confirmed by confocal microscopy. The impact of oil volume fraction (φ = 0.20–0.70) and SD concentration (1.0–5.0 % wt.) on emulsion stability was evaluated. An intermediate φ (0.45) consistently minimised creaming index (CI = 0–16.67 %) and droplet size (D[4,3] =2.53–4.12 μm). Complete reduction of creaming (CI = 0 %) was achieved at high SD concentration with low φ or low SD concentration with high φ, leading to improved stability. The three produced optimised formulations exhibited distinct colour properties (L* = 64.06–72.00, a* = 11.09–12.50, b* = 55.10–60.70), with hues ranging from yellow to orange, highlighting their potential for natural colouring applications. Rheological behaviour varied from gel-like (G’ > G”) to viscoelastic (G’ = G”), broadening their potential in food formulations. Higher SD concentrations with lower/intermediate φ produced structured, gel-like emulsions suitable for sauces or spreads. In contrast, lower SD concentrations with higher φ yielded fluid emulsions for dressings or beverages. These findings highlight the feasibility of SD-based Pickering emulsions for designing stable (≥30 days), visually appealing, and texturally versatile food products.
- Bacterial cellulose biosynthesis in the presence of raw moist olive pomace: A green sustainable approach that enhances biopolymer production and propertiesPublication . Crugeira, Pedro; Khelifa, Halima; Barreira, Luísa; Halla, Noureddine; Barreiro, Filomena; Rodrigues, Paula; Peres, António M.; Schreiner, Tatiana B.; Schreiner, Tatiana B.In this study, the biosynthesis of bacterial cellulose (BC) by Komagataeibacter intermedius strain isolated from Kombucha tea in the presence of raw moist olive pomace (MOP) (concentration up to 40 % in the fermentation media) was studied. The BC membranes were characterized by their antioxidant activity, structural character- istics, crystallinity, thermal stability, and mechanical behavior. Using raw MOP activated the inherent activity of the phenolic compounds, leading to cellular adaptation under unfavorable conditions and increased BC pro- duction for all tested MOP concentrations (p < 0.0001). This led to a 166.61 % increase for the 20 % MOP group compared to the control (HS medium). For this sample, enhanced antioxidant activity (~40-fold higher than the control) was found, which might be associated with the molecular interactions established between hydroxyls of BC and phenolic compounds. Moreover, an increase of 603.03 % in strain capacity, and a 376.01 % improvement in stress at break compared to the control was observed. The study confirmed that BC can be synthesized using MOP in its natural state, supporting a sustainable circular economy while enhancing the biosynthesis of a value- added product. By reducing synthetic media and utilizing MOP, a greener bioprocess can be achieved, and BC’s applicability can be expanded.
- Bioactive properties of different extracts obtained from the aerial parts of blueberry and raspberry raw materialsPublication . Plasencia, Paula; Heleno, S.A.; Pinela, J.; Pires, Tânia; Alves, Maria José; Barreiro, Filomena; Ferreira, Isabel C.F.R.; Barros, LillianThe waste biomass derived from Berry crops is a new focus of study since producers are becoming increasingly interested in its valorisation, namely to obtain high added-value products. In this context, the leaves, and other aerial parts of this raw material, are examples of waste biomass that can be exploited for several applications, namely in cosmetic formulations due to their unique chemical composition and associated bioactive properties [1,2]. In this context, this work was focused on upgrading the commercial potential of blueberry and raspberry plant by-products, which are typically discarded, presenting no economic value. Different extracts of Vaccinium myrtillus L. (blueberry) and Rubus idaeus L. (raspberry) aerial parts were obtained using green methodologies after being air-dried, grounded at 20 mesh, and protected from light. Different extraction techniques were applied, such as infusion, decoction, maceration, and ultrasoundassisted extraction (UAE), being the latter two extractions performed with EtOH:H2O (80:20 v/v) as the extraction medium. The obtained extracts were studied regarding their antioxidant and antimicrobial properties through the oxidative haemolysis inhibition assay (OxHLIA) and the microdilution method against pathogenic bacteria, respectively.
- Chemical and bioactive characterization of blueberry bioresiduesPublication . Plasência, Paula; Heleno, S.A.; Garcia, Pablo; Barreiro, Filomena; Ferreira, Isabel C.F.R.; Barros, LillianBlueberry production has increased exponentially in recent decades due to its known high nutritional characteristics, and bioresidues originating from its culture have also increased. It is critical to limit its buildup. One strategy for directing these residues is to turn them into high-value products while investigating their potential bioactivity. The goal of this study was to produce bioactive extracts from blueberry aerial parts using environmentally friendly methods. Different extracts, such as infusion, maceration, and decoction, were considered, as well as emerging extraction technologies, such as ultrasound-assisted extraction, in which different conditions (potency, temperature, and solvent type) were tested to achieve optimal extraction conditions (high yields and purity). The obtained extracts were studied regarding their chemical profile through phenolic compound´s identification and quantification by HPLC-DAD-MS.
- Closing Editorial: New Insights into Food Ingredients for Human Health PromotionPublication . Ribeiro, Andreia; Barreiro, FilomenaIn recent years, the intersection of food science and health promotion has gained interest. Driven by consumer awareness and a global push toward healthier, safer, and more sustainable food systems, the demand for functional, fortified, and clean-label products has grown substantially. In response to these evolving expectations, this Special Issue of Applied Sciences, titled “New Insights into Food Ingredients for Human Health Promotion”, brings together research and review articles that explore the development, characterization, and application of bioactive compounds with the potential to promote human health. These contributions reflect a commitment to innovation in food ingredient science, offering solutions that are both effective and aligned with the Sustainable Development Goals.
- Discriminação de azeites ‘Verdeal Transmontana’ de acordo com a idade das oliveiras recorrendo à espectroscopia no infravermelho por transformada de FourierPublication . Lamas, Sandra; Baptista, Paula; Santamaria-Echart, Arantzazu; Barreiro, Filomena; Peres, António M.; Pereira, José Alberto; Rodrigues, Nuno; Baptista, PaulaO efeito da idade das oliveiras na qualidade do azeite é ainda pouco conhecido. Nesse sentido, o presente trabalho teve como objetivo avaliar a influência da idade da oliveira na qualidade e composição dos azeites, usando a cv. Verdeal Transmontana como modelo. Para tal foram selecionadas 15 oliveiras jovens (< 20 anos), 15 com idade intermédia (entre 20 e 50 anos) e 15 centenárias (> 100 anos), de cujas azeitonas foram extraídos azeites. Nos azeites avaliaram-se os parâmetros de qualidade (acidez, índice de peróxidos, coeficiente de extinção específica no ultravioleta, avaliação sensorial), atividade antioxidante e estabelecidos os espetros no infravermelho por transformada de Fourier (FTIR). Todos os azeites obtidos podem ser classificados como azeite virgem extra. A idade da planta influenciou alguns parâmetros, sem que tenha uma tendência linear. Os azeites extraídos de oliveiras com idade intermédia, apresentaram valores superiores de atividade antioxidante e teor em fenóis totais. A aplicação da análise discriminante linear (LDA), conjuntamente com o algoritmo metaheurístico de seleção de variáveis (SA), aos espetros de FTIR, permitiram estabelecer um modelo FTIR-LDA-SA, com base nas transmitâncias (%) registadas para 10 números de onda selecionados (2860, 2856, 2783, 1329, 1094, 918, 739, 723, 683, e 615 cm-¹). O modelo apresentou sensibilidade e especificidade de 100%, permitindo identificar corretamente as idades de todas as oliveiras estudadas, com base nos espectros FTIR, de acordo com a validação cruzada k-fold. O sucesso alcançado na previsão permite concluir que a técnica FTIR pode ser usada como uma ferramenta não invasiva/não-destrutiva de identificação da idade das oliveiras com base nos espectros de transmitância dos azeites extraídos.
- Ethosomes: an approach for bioactive plant extract preservation envisaging cosmetic applicationsPublication . Plasencia, Paula; Santamaria-Echart, Arantzazu; Heleno, S.A.; Colucci, Giovana; Garcia, Pablo; Barros, Lillian; Barreiro, FilomenaThe present work is focused on upgrading the commercial potential of berry crop by-products by encapsulating them into liposomes to preserve their bioactivity. The extracts have been obtained with an ethanol-water mixture using ultrasound-assisted extraction, and the most promising ones were encapsulated in ethosome system. To achieve this goal, ethosomes were prepared using the cold method. Ethosomal suspensions were characterized concerning particle size distribution by laser dispersion, differential scanning calorimetry, infrared Fourier-transform spectroscopy, encapsulation efficiency, and morphological analysis using optical, scanning electron, and transmission electron microscopy. These results indicate that ethosomes are an appropriate method to encapsulate hydroethanolic bioactive plant bioresidue extracts and a good option to preserve them for further use in industrial applications, such as cosmetics. Future work will include optimizing the process and proof of concept by developing a cosmetic application.
- Extração de compostos bioativos de folhas de mirtilo por metodologias verdesPublication . Plasência, Paula; Ferreira, Isabel; Barreiro, Filomena; Garcia, Pablomirtilo faz parte do grupo de frutos de baga com a maior concentração de compostos antioxidantes, maioritariamente antocianinas e outros flavonoides. Como resultado do interesse nas suas propriedades antioxidantes, a sua produção mundial tem vindo a aumentar desde 2005, tendo atingido em 2017 um valor de quase 600 Kton, sendo a Europa responsável por 18,4% da sua produção líquida. Até ao momento, as folhas de mirtilo ainda não foram estudas em detalhe, mas alguns resultados apontam para que estas tenham potencial como fonte de compostos fenólicos antioxidantes. A biomassa resultante da cultura do mirtilo é um novo objeto de estudo, uma vez que os produtores estão cada vez mais interessados na sua valorização, nomeadamente em produtos de alto valor acrescentado. Neste contexto, as folhas são um bom exemplo de biomassa residual que pode ser explorada para aplicações cosméticas, entre outras. Já estão descritas aplicações da incorporação de extrato comercial de mirtilo em micropartículas com atividade antioxidante e boa estabilidade físico-química, posteriormente testadas em cosméticos multifuncionais
- Extraction of Bioactive Compounds from Rubus Idaeus Bioresidues: A Full Screening on Phenolic Composition and Bioactive PotentialPublication . Plasencia, Paula; Finimundy, Tiane C.; Carocho, Márcio; Calhelha, Ricardo C.; Añibarro-Ortega, Mikel; Pires, Tânia C.S.P.; Barreiro, Filomena; Garcia, Pablo A.; Barros, Lillian; Heleno, Sandrina A.Purpose Rubus idaeus cultivation has boosted productivity due to its high nutritional value. In consequence, waste produc- tion increased. The discarded biomass, including leaves and aerial components, can be transformed into valuable functional ingredients for industrial applications, such as cosmetics. Studying their bioactivity potential is highly relevant. Methods According to the present idea, the research involved producing extracts from raspberry plant branches and leaves by employing four different techniques: aqueous decoction, aqueous infusion, hydroethanolic maceration, and ultrasound- assisted extraction (UAE). Subsequently, these compounds were screened for their bioactive potential, including antioxidant, antibacterial, anti-inflammatory, and cytotoxic properties. Results The ultrasound-assisted extraction produced extracts rich in phenolic compounds, whereas the infusion and macera- tion methods resulted in higher flavonol contents. Among the identified phenolic compounds, hydrolyzable tannins, particu- larly galloyl-bis-HHDP-glucose, were the most dominant ones. Regarding antioxidant potential, the decoction extract was the strongest, while the infusion showed the greatest potential for inhibiting lipid peroxidation. The UAE extract was found to be highly effective as an antibacterial agent. Both infusion and UAE extracts demonstrated the highest anti-inflammatory potential. Conclusion The combination of these results highlights the sample’s bioactive potential and the importance of exploiting bioresidues as unique, sustainable candidates for industrial applications.
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