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Percorrer por autor "Estevinho, L. M."

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  • Evaluation of FT - Raman and FTIR – ATR spectroscopy for the quality evaluation of Lavandula spp. Honey
    Publication . Anjos, O.; Guiné, Raquel; Santos, A. J. A.; Paula, V. B.; Pereira, H.; Estevinho, L. M.
    Mono fl oral Lavandula spp. honey is very appre - ciated by consumers due to its characteristic and pleasant aroma and fl avor. Given the economic importance of this type of honey, it is important to develop a rapid and non - expensive methodology that allows certifying its quality. In this context, this study aimed to compare the applic - ability and accuracy of FTIR - ATR and FT - Raman techni - ques for the quality evaluation of Lavandula spp. honey. Calibration models, with PLS regression models, were obtained for both methodologies concerning the following parameters: total acidity, reducing sugars, hidroximetil - furfural ( HMF ) , electrical conductivity, ash, proline con - tent, diastase activity, apparent sucrose, total fl avonoids, and total phenolic contents. The calibration models had high regression coe ffi cients, r 2 ( FTIR - ATR: 0.965 – 0.996; FT - Raman: 0.983 – 0.999 ) , high ratios of performance to deviation, RPD ( FTIR - ATR: 5.4 – 15.7; FT - Raman: 7.6 – 53.7 ) , and low root mean square errors ( RMSEs; FTIR - ATR: 0.005 – 3.0; FT - Raman: 0.004 – 1.02 ) . These results corrobo - rate the potentiality of FTIR - ATR and FT - Raman for quality evaluation and evaluation of the chemical properties of Lavandula spp. honey even though FT - Raman technique provided more accurate models.
    2021Artigo científico Acesso aberto Ver mais
  • Therapeutic Potential Applications for Bee Pollen
    Publication . Florença, S. G.; Anjos, O.; Ferreira, Manuela; Campos, M. G.; Estevinho, L. M.; Correia, Paula; Costa, Cristina Amaro; Guiné, Raquel P. F.
    Since ancient times, bee pollen has emerged as a rich food product, which, besides being a source of energy, contains beneficial substances with recognized properties, both nutritionally and therapeutically. Recently, research about this natural product has allowed a more supported recognition of its health enhancement potential. The therapeutic properties of bee pollen are associated with the chemical composition, in particular vitamins, minerals, polysaccharides, and bioactive compounds, like phenolic acids and flavonoids. Due to the reasons highlighted, this review aims to synthesize some fundamental aspects of the relationship between the product's constituents and their respective bioactivity, in light of the most recent publications, which reveal the potential of bee pollen as a healthy product. Among them, citations of the most relevant benefits report the antioxidant, anti-inflammatory, antifungal, and antimicrobial bioactivities. Other potentialities, as the therapeutic use in drug discovery, include, for instance, the ability to modulate cancer development. Along the sections of this chapter these health effects will be presented and discussed.
    2022Capítulo de livro Acesso aberto Ver mais