Encontrados 547 documentos, a visualizar página 1 de 55
Nutritional and safety assessment of brown seaweed species and their extracts
Silva, Aurora; Soares, Cristina; Carpena, Maria; Fernandes, Virginia Cruz; Chamorro, Franklin; Delerue-Matos, Cristina; Barroso, M. FátimaThis study examines the nutritional profiles of Bifurcaria bifurcata (BB), Ascophyllum nodosum (AN), and Fucus spiralis (FS), as well as their extracts obtained through microwave-assisted extraction. Compositional analysis covered residual water, volatiles, fixed carbon, ash, lipids, sugars, protein, and fiber. Proximate analysis revealed high protein levels in FS (9.72 %) and BB (ext) (4.95 %). Lipid content r...
Towards Botanical Authentication of Ginkgo Food Supplements: A Holistic Approac...
Grazina, Liliana; Paíga, Paula; Amaral, Joana S.; Costa, Joana; Moreira, Manuela M.; Delerue-Matos, Cristina; Mafra, IsabelGinkgo biloba is one of the most consumed medicinal plants and broadly included as an ingredient in plant food supplements (PFS) and herbal infusions, being potential targets for economically motivated adulteration. This work aimed at comparing the use of DNA and phytochemical markers to authenticate the botanical origin of ginkgo-leaf extracts and PFS. Quantitative real-time PCR was used to detect ginkgo DNA, ...
Environmental and food safety assessment of pre-harvest activities in local sma...
Macieira, Ariana; Fernandes, Virgínia Cruz; Brandão, Teresa R. S.; Delerue-Matos, Cristina; Teixeira, PaulaThe popularity of small-scale and local fruit and vegetable production has increased in recent years due to perceived economic, environmental, and social benefits. However, these operations face contamination risks that both consumers and small-scale producers may underestimate. The present study aimed to assess the microbiological and chemical hazards on fruit, vegetables, soil, and water samples from small-sc...
Optimizing vineyard pruning biochars for nutrient adsorption: toward sustainabl...
Dorosh, Olena; Peixoto, Andreia F.; Delerue-Matos, Cristina; Castro, Paula M. L.; Moreira, Manuela M.Agricultural residues, such as vineyard prunings, are abundant yet underutilized resources with potential for conversion into value-added products. In this study, vineyard prunings were investigated for the first time as feedstock for nutrient-enriched biochars intended for use as enhanced efficiency fertilizers (EEFs). Four biochars were produced using distinct physical (industrial-scale pyrolysis, CO2-assiste...
Molecularly imprinted polymer-based sensor for the determination of 2,4-dinitro...
Torre, Ricarda; Rebelo, Patrícia; Seguro, Isabel; Pacheco, João G.; Amaral, Joana S.; Nouws, Henri P.A.; Delerue-Matos, CristinaThe rising demand for weight-loss solutions, driven by obesity concerns and societal pressure, has led to an increasing growth in both the consumption and market of food supplements. However, several studies have identified food supplements as common targets of economically motivated adulteration by the addition of pharmaceutical drugs to enhance the product's effects. Despite its toxicity and associated health...
Innovative use of spent Brewer’s yeast for tannin adsorption from treatment sol...
Vieira, Elsa Marisa; Amaral, Tomás; Delerue-Matos, Cristina; Ferraz, Ricardo; Ferraz, RicardoThis study aimed to evaluate the capacity of spent brewer’s yeast (BSY) to adsorb tannins and other phenolic compounds from an alkaline-extracted chestnut shell tannin solution (CS tannin extract). The alkaline extraction process used 5% NaOH (v/v), a method commonly employed to extract cellulosic material from chestnut shells (CSs). The findings of this research contribute to the development of more sustainabl...
Environmental and food safety assessment of pre-harvest activities in local sma...
Macieira, Ariana; Fernandes, Virgínia Cruz; Brandão, Teresa R. S.; Delerue-Matos, Cristina; Teixeira, Paula; Fernandes, VirgíniaThe popularity of small-scale and local fruit and vegetable production has increased in recent years due to perceived economic, environmental, and social benefits. However, these operations face contamination risks that both consumers and small-scale producers may underestimate. The present study aimed to assess the microbiological and chemical hazards on fruit, vegetables, soil, and water samples from small-sc...
Unlocking the functional potential of Mesembryanthemum nodiflorum: Insights int...
Pinto, Diana; Vieira, Raquel; Teixeira, Filipa; Sut, Stefania; Vieira, Mónica; Salazar, Miguel; Delerue-Matos, Cristina; Dall’Acqua, StefanoMesembryanthemum nodiflorum, commonly known as slenderleaf iceplant, is an undervalued edible halophyte. The nutraceutical potential of M. nodiflorum was investigated in the current study by extracting bioactive compounds using ultrasound-assisted extraction (UAE) and assessing the influence of gastrointestinal digestion and intestinal permeability on their bioactive composition. The phenolic and flavonoid cont...
Screening for microplastics in agricultural soils: Applying green chemistry pri...
Rede, Diana; Vilarinho, Rui; Delerue-Matos, Cristina; Moreira, Joaquim Agostinho; Fernandes, Virgínia Cruz; Fernandes, VirgíniaIn recent years, microplastic (MP) pollution has garnered significant attention owing to its ability to permeate various ecosystems, including soil. These particles can infiltrate the environment, either directly or through the degradation of larger plastic items. Despite growing concerns, standardized methods for quantification are still lacking. This study aimed to screen for the presence of MPs in agricultur...
Optimized extraction protocols for bioactive antioxidants from commercial seawe...
Santos, Francisca; Soares, Cristina; Morais, Stephanie L.; Neves, Cátia; Grosso, Clara; Ramalhosa, Maria João; Vieira, Mónica; Delerue-Matos, CristinaThis study aimed to optimize the extraction conditions for a valuable source of antioxidants: seaweed. Therefore, ten seaweed samples were subjected to a solid–liquid extraction (SLE), where the extraction conditions (biomass (g): solvent (mL) ratio, temperature, and time) were optimized using response surface methodology (RSM). The seaweeds were also subjected to subcritical water extraction (SWE) (140 and 190...