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  • Lemon dietary fibre-based powder as a promising ingredient for the food industry: enhancing mortadella nutritional quality
    Publication . Magalhães, Daniela; Rodrigues, Cristina V.; Botella-Martinez, Carmen; Muñoz-Tebar, Nuria; Pérez-Álvarez, José Angel; Viuda-Martos, Manuel; Teixeira, Paula; Pintado, Manuela
    Lemon co-products are valuable due to their high dietary fibre, making them significant for valorisation. This research aimed to characterise an innovative lemon dietary fibre (LDF) obtained through integrated extraction (of essential oil, phenolic compounds (PCs), and pectin) by evaluating its chemical, physicochemical, structural, techno-functional, total phenolic content, and antioxidant and antibacterial properties. The effects of incorporating LDF (3% and 6%) into mortadella, a bologna-type sausage, on chemical, physicochemical, technological, and sensory properties were analysed. LDF exhibited a total dietary fibre content of 85.79%, mainly insoluble (52.55%). Hesperidin (89.97–894.44 mg/100 g DW) and eriocitrin (68.75–146.35 mg/100 g DW) were the major free PCs. The major bound PCs were vanillin (5.90–9.16 mg/100 g DW) and apigenin-7-O-glucoside (8.82 mg/100 g DW). This functional ingredient demonstrated antioxidant and antibacterial activity. LDF significantly influenced mortadella’s colour, texture, and mineral composition. Higher levels of LDF result in a paler colour and increased hardness and contribute to reducing sodium levels of the final product. It also decreased residual nitrite levels, although this reduction was followed by a slight increase in lipid oxidation, which remained below the rancidity threshold (≥1.0), ensuring acceptable product quality. Sensory evaluation revealed positive feedback, favouring the 3% LDF formulation.
    2025-05-10Research article Open access Show more
  • Do clear aligners release toxic chemicals? - a systematic review
    Publication . Ferreira, Mariana; Costa, Hélder; Veiga, Nélio; Correia, Maria J.; Gomes, Ana T. P. C.; Lopes, Pedro C.
    The use of advanced polymer materials in clear aligners, such as polyurethane and PET-G, has gained widespread acceptance due to their mechanical properties, biocompatibility and aesthetic appeal. However, concerns persist regarding their potential to release chemical compounds. Our goal is to understand the impact of the toxicity of clear aligners on oral cavity of orthodontic patients. An extensive systematic search was conducted in electronic databases PubMed, Scopus and Cochrane, to identify articles with relevant data. This systematic review will be conducted following the Preferred Reporting Items for Systematic reviews and Meta-analysis guidelines to answer a question formulated according to the Population, Intervention, Com-parison and Outcomes strategy. Four hundred and thirteen articles potentially relevant were identified and after applying PRISMA guidelines 7 articles were included in this review. Our results suggest that clear aligners are generally safe, concerns remain regarding the chemical leaching of thermoplastic materials, bacterial accumulation due to reduced saliva flow, and mild inflammatory responses. Our review empha-sizes that although most materials are biocompatible, some exhibit moderate cytotoxicity, underscoring the need for continued research and improvements in material composition.
    2025-05-10Preprint Open access Show more