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Exploring acorn shells: Phenolic composition and bioactive potential for sustai...
Mateus, Cristiano; Alonso-Esteban, José Ignacio; Finimundy, Tiane C.; Mandim, Filipa; Oliveira, Izamara; Babo, Pedro; Ferreira, Isabel C.F.R.Pedunculate (Quercus robur L.), holm (Quercus rotundifolia Lam.), and cork (Quercus suber L.) oaks are abundant across the Portuguese landscape. This study aims to evaluate the phenolic composition and bioactivities of acorn shell samples and determine their potential as a functional compound source. In total, five acorn shell samples collected in different locations and from different species were analyzed: Q....
Nutritional and Bioactive Characterization of Unconventional Food Plants for Su...
Oliveira, Izamara; Salgado, José Miguel R.T.; Lopes, João Pedro Krauspenhar; Carocho, Márcio; Silveira, Tayse F. F. da; Garcia, Vitor Augusto dos SantosUnconventional food plants (UFPs) are increasingly valued for their nutritional composition and bioactive potential. This study proposes a comprehensive characterization of the chemical and bioactive properties of Pereskia aculeata Miller (Cactaceae) (PA); Xanthosoma sagittifolium (L.) Schott (Araceae) (XS); Stachys byzantina K. Koch (Lamiaceae) (SB); and inflorescences from three cultivars of Musa acuminata (M...
Magnesium and manganese induced changes on chemical, nutritional, antioxidant a...
Oliveira, Izamara; Chrysargyris, Antonios; Finimundy, Tiane C.; Carocho, Márcio; Santos-Buelga, Celestino; Calhelha, Ricardo C.; Tzortzakis, Nikolaoscomposition was determined using standard methods. Free sugars, fatty acids, organic acids, tocopherols, and phenolic compounds were analyzed using various HPLC and GC devises. The extract’s antimicrobial, antioxidant, cytotoxicity, and anti-inflammatory activity were assessed. The results indicated that Mg enrichment negatively affected plant growth and mineral accumulation but improved photosynthetic performa...
The influence of magnesium and manganese cations on the chemical and bioactive ...
Oliveira, Izamara; Chrysargyris, Antonios; Finimundy, Tiane C.; Carocho, Márcio; Santos-Buelga, Celestino; Calhelha, Ricardo C.; Tzortzakis, NikolaosThis research investigated the effects of hydroponic cultivation with enriched concentrations of magnesium (+Mg), manganese (+Mn), a combination of +Mg and +Mn, or decreased concentrations of these minerals (control) on the nutritional, chemical, and bioactive attributes of purple and green basil. While Mn significantly increased the growth of purple basil and affected the composition of essential oil and miner...
Non-alkaloid nitrogen-containing compounds from fungi
Hached, Hanine; Cassani, Lucia; Zbiss, Yosra; Fraga-Corral, Maria; Oliveira, Izamara; Pereira, Antia Gonzalez; Prieto Lage, Miguel A.Fungi represent an ancient ubiquitous and interesting kingdom that can be classified into Phycomycota, Oomycota, Microsporidiomycota, Zygomycota, Ascomycota, Basidiomycota, and Deuteromycota divisions. These microorganisms are considered as a reservoir of bioactive compounds that can be exploited in crucial fields: food, pharmaceutical, and agricultural industries. Non-alkaloid nitrogenated compounds are consid...
New challenges and opportunities from secondary metabolites
Oliveira, Izamara; Albuquerque, Bianca R.; Ueda, Jonata Massao; Alves, Maria José; Ferreira, Isabel C.F.R.; Barros, Lillian; Heleno, Sandrina A.Secondary metabolites (SMs), usually of complex structure and low molecular weight, have remarkable biological activities and, unlike the primary metabolites, are presented in low concentrations and in certain groups of plants. These, in turn, arouse great interest, not only for the biological activities exerted by plants in response to environmental stimuli, but also for the immense pharmacological activity th...
Chemical and bioactive screening of green polyphenol-rich extracts from chestnu...
Rodrigues, Daniele Bobrowski; Verissimo, Lavinia; Finimundy, Tiane C.; Rodrigues, Joana P.B.; Oliveira, Izamara; Fernandes, Isabel P.; Barros, LillianOpportunities for the valorisation of agro-industrial residues of the chestnut (Castanea sativa Mill.) production chain have been fostered with the production of multifunctional polyphenol-rich extracts with the potential to be introduced as natural additives or active components in several products. Nonetheless, it is crucial to explore the feasibility of different extracts from the various by-products for the...
Effects of the extraction techniques on the chemical composition and bioactive ...
Oliveira, Izamara; Chrysargyris, Antonios; Heleno, Sandrina A.; Carocho, Márcio; Calhelha, Ricardo C.; Dias, Maria Inês; Petrović, JovanaThe present study aims to determine the combined effect of cropping system and irrigation regime on the chemical composition and bioactive properties of lemon balm aerial parts. For this purpose, lemon balm plants were grown under two farming systems (conventional farming vs organic farming) and two irrigation levels (full irrigation vs deficit irrigation) and harvested twice throughout the growing period. The ...
Optimization and comparison of heat- and ultrasound-assisted extraction methods...
Albuquerque, Bianca R.; Pinela, José; Pereira, Carla; Calhelha, Ricardo C.; Oliveira, Izamara; Heleno, Sandrina A.; Oliveira, Beatriz; Barros, LillianThis study is aimed at maximizing the recovery of anthocyanins from Sicana odorifera fruit epicarp by heat- and ultrasoundassisted extraction (HAE and UAE, respectively) and at evaluating the in vitro bioactive properties of the anthocyanin-rich extracts obtained under optimized conditions. The optimization process utilized response surface methodology (RSM) through a central composite rotatory design (CCRD), c...
Composição fenólica e atividade biológica de extratos de casca e ramos de J...
Xavier, Virginie; Finimundy, Tiane C.; Amaral, Joana S.; Pinela, José; Calhelha, Ricardo C.; Oliveira, Izamara; Madiavilla, IreneA espécie Juniperus communis L., comumente designada “zimbro” em Portugal, é uma conífera, pertencente à familia Cupressaceae e adaptada à baixa disponibilidade de nutrientes no solo. O zimbro foi usado na medicina tradicional para tratar infeções urinárias, dermatites ou como diurético, entre outros, dada a sua composição em bioativos como compostos fenólicos, terpenóides e ácidos orgânicos. Nos últimos anos, ...