43 documents found, page 1 of 5
The Effect of Incorporating Fermented Elderberries (Sambucus nigra) into Bread:...
Seixas, Natália L.; Paula, Vanessa B.; Dias, Teresa; Dias, Luís G.; Estevinho, Letícia M.Elderberries, known for their antioxidant, anti-inflammatory, and antiviral properties, have traditionally been used to prevent and treat infections and boost the immune system. By increasing the quantity and quality of certain compounds, fermentation can potentially make them more effective as food additives. The aim of this study was to evaluate the effect of incorporating fermented elderberries on the bioact...
Microbiological and Physicochemical Evaluation of Hydroxypropyl Methylcellulose...
Paula, Vanessa B.; Dias, L.G.; Estevinho, Leticia M.Dairy products are highly susceptible to contamination from microorganisms. This study aimed to evaluate the efficacy of hydroxypropyl methylcellulose (HPMC) and propolis film as protective coatings for cheese. For this, microbiological analyses were carried out over the cheese' ripening period, focusing on total mesophilic bacteria, yeasts and moulds, lactic acid bacteria, total coliforms, Escherichia coli, an...
Phenolic Class Analysis in Honey: Comparison of Classical and Single UV Spectru...
Paula, Vanessa B.; Sousa-Dias, Miguel L.; Seixas, Natália da Assunção Lisboa; Combarros-Fuertes, Patricia; Estevinho, Leticia M.; Dias, L.G.The analytical results from a study of 16 honey samples (extra white to dark honey color range) of phenolic compounds obtained using the single UV spectrum methodology and classical spectrophotometric methods (Folin–Ciocalteu and AlCl3 methods) are presented. The first method quantified all classes of phenolic compounds in honey’s SPE-C18 extract: the total hydroxybenzoic acid content (concentrations between 0....
Biological activities of endophytic fungi isolated from Annona muricata Linnaeu...
Silva, I.M.M.; Silva, Reanne M.M.; Paula, Vanessa B.; Estevinho, Leticia M.This systematic review integrates the data available in the literature regarding the biological activities of the extracts of endophytic fungi isolated from Annona muricata and their secondary metabolites. The search was performed using four electronic databases, and studies’ quality was evaluated using an adapted assessment tool. The initial database search yielded 436 results; ten studies were selected for in...
Fermented Grapevine Leaves: Potential Preserving Agent in Yogurt
Freitas, Lais; Sousa-Dias, Miguel L.; Paula, Vanessa B.; Dias, L.G.; Estevinho, Leticia M.In this study, we monitored the fermentative process of Vitis vinifera L. leaves (grapevine), spontaneously or promoted by Saccharomyces cerevisiae, in both solid and liquid media. We also aimed to evaluate the effect on the bioactivity and shelf life of yogurt incorporating fermented and non-fermented grapevine leaves compared to yogurt produced with the preservative potassium sorbate. The results revealed tha...
Enhancing Honey Quality Control Using Vibrational Spectroscopy Techniques
Anjos, O.; Paula, Vanessa B.; Guiné, Raquel; Estevinho, L.M.Ensuring the quality of honey is vital for consumer safety, product authenticity, and maintaining its market value. Given honey's economic importance, developing a rapid and cost-effective method to certify its quality is essential. Fourier-transform infrared spectroscopy with Attenuated Total Reflection (FTIR-ATR) and FT-RAMAN techniques have been extensively used in food analysis, particularly for honey. This...
Quality of bee pollen submitted to drying, pasteurization, and high-pressure pr...
Anjos, Ofélia; Seixas, Natália da Assunção Lisboa; Antunes, Carlos A.L.; Campos, Maria G.; Paula, Vanessa B.; Estevinho, Leticia M.Bee Pollen is a valuable and useful natural food product that can be used for different purposes, among which medical ones. This matrix is deemed a superfood because of its chemical composition, which is rich in nutrients and possesses significant bioactivities, including antioxidant and microbiological properties. Nevertheless, the storage conditions and processing methods must be optimized to maintain their p...
Antimicrobial activity of propolis from the Brazilian stingless bees Melipona q...
Campos, Jaqueline Ferreira; Bonamigo, Thaliny; Rocha, Paola dos Santos; Paula, Vanessa B.; Santos, Uilson Pereira dosMelipona quadrifasciata anthidioides and Scaptotrigona depilis are species of stingless bees capable of producing propolis, which has considerable bioprospecting potential. In this context, the objective of this study was to determine the chemical compositions and evaluate the antimicrobial activity of propolis produced by M. q. anthidioides and S. depilis. The ethanolic extracts of propolis of M. q. anthidioid...
Comparative methods to evaluate the antioxidant capacity of propolis: an attemp...
Paula, Vanessa B.; Estevinho, Leticia M.; Cardoso, Susana M.; Dias, L.G.Propolis is a natural product produced by bees that contains a complex mixture of compounds, including phenolic compounds and flavonoids. These compounds contribute to its biological activities, such as antioxidant capacity. This study analysed the pollen profile, total phenolic content (TPC), antioxidant properties, and phenolic compound profile of four propolis samples from Portugal. The total phenolic compou...
Melipona scutellaris geopropolis: chemical composition and bioactivity
Coutinho, Sónia; Matos, Vanessa; Seixas, Natália da Assunção Lisboa; Rodrigues, Hellen; Paula, Vanessa B.; Freitas, Lais; Dias, TeresaGeopropolis has been used in traditional medicine for centuries. In this study, the botanical origin, physicochemical profile, and biological activities of geopropolis from Melipona scutellaris harvested during rainy and dry seasons were investigated. Palynological analysis identified over 50 pollen types, with Schinus terebinthifolius and Cecropia being the predominant types. The analytical results were in lin...