12 documents found, page 1 of 2
PEF Priming of Seeds for Microgreen Production: A Comparative Study
Aguiar-Macedo, Mafalda; Dulyanska, Yuliya; Guiné, Raquel; Costa, Daniela V. T. A.; Redondod, Luis M; de Pinho Ferreira Guiné, RaquelSeed priming with Pulsed Electric Fields (PEF) is a promising strategy to enhance early plant development and crop quality. This study evaluated PEF priming effects on Beetroot (Beta vulgaris L.), Arugula (Eruca vesicaria), and Basil (Ocimum basilicum L.) microgreens by assessing the effects of three distinct monopolar PEF protocols (PEFA: 2 kV/cm; PEFB: 3 kV/cm; PEFC: 4 kV/cm). PEFB and PEFC treatments signifi...
Valorization of Arbutus unedo L. Bark Through Chemical Composition Analysis, Li...
Cruz-Lopes, Luísa; Dulyanska, Yuliya; Lopes, Rogério; Domingos, idalina; Ferreira, José; Esteves, BrunoArbutus unedo (strawberry tree) is a small Mediterranean tree capable of vigorous regrowth after disturbances like fire. Traditionally used for biomass fuel, its bark and branches hold potential for higher-value products through ecovalorization into liquid mixtures that could replace petroleum-based materials. This study aimed to explore the chemical composition of various components of Arbutus unedo and to pro...
FTIR Monitoring of Polyurethane Foams Derived from Acid-Liquefied and Base-Liqu...
Dulyanska, Yuliya; Cruz-Lopes, Luísa; Esteves, Bruno; Guiné, Raquel; Domingos, IdalinaPolyalcohol liquefaction can be performed by acid or base catalysis, producing polyols with different properties. This study compared the mechanical properties of foams produced using polyols from liquefied Cytisus scoparius obtained by acid and base catalysis and using two different foam catalysts. The differences were monitored using FTIR analysis. Acid-catalyzed liquefaction yielded 95.1%, with the resultant...
Enhancing Liquefaction Efficiency: Exploring the Impact of Pre-Hydrolysis on Ha...
Cruz-Lopes, Luísa; Duarte, Joana; Dulyanska, Yuliya; Guiné, Raquel; Esteves, BrunoHazelnut shells (HS), scientifically known as Corylus avellana L. shells, are waste produced by companies that process nuts. The main objective of this study was to find an efficient way to maximize the chemical potential of HS by solubilizing the hemicelluloses, which could then be used to recover sugars and, at the same time, increase the lignin content of this material to produce adhesives or high-strength f...
Development of Innovative Candied Chestnuts from Three Chestnut Cultivars Grown...
Foucher, Laure; Barroca, Maria João; Dulyanska, Yuliya; Correia, Paula; Guiné, Raquel P. F.The main purpose of this work is the development of a value-added product (candied chestnuts) from Portuguese chestnut (Castanea sativa) cultivars (Martainha, Longal and Judia), as a way to minimize product loss and wastes. To accomplish this goal, the effects of rehydration, cooking, and syrup conditions on composition, textural properties, and colour parameters of candied chestnuts were investigated. The obta...
Eco Valorization of Eucalyptus globulus Bark and Branches through Liquefaction
Fernandes, Ana Paula; Cruz-Lopes, Luísa; Dulyanska, Yuliya; Domingos, Idalina; Ferreira, José; Evtuguin, Dimitri; Esteves, BrunoEucalyptus globulus forest residues, bark, and branches, were characterized by wet chemistry methods and involved in the liquefaction process using a glycerol-ethylene glycol reaction mixture (1:1, v/v) catalyzed by strong mineral acid (3% H2SO4) or strong mineral base (6% KOH). The effect of the reaction conditions (temperature and duration) and the particle size on the yield of liquefied products have been ev...
Influence of Pre-Hydrolysis on the Chemical Composition of Prunus avium Cherry ...
Cruz-Lopes, Luísa; Dulyanska, Yuliya; Domingos, Idalina; Ferreira, José; Fragata, Anabela; Guiné, Raquel; Esteves, BrunoDuring the industrial processing of sweet cherry fruits, the seeds are considered agricultural waste and must be disposed of, typically through burning. In this context, it is intended to contribute to the scientific development of the ecovalorization of by-products and to provide new strategies for their transformation into value-added products obtained from sweet cherry seeds (SCS). This work aimed to establi...
Chemical Composition and Optimization of Liquefaction Parameters of Cytisus sco...
Cruz-Lopes, Luísa; Almeida, Daniela; Dulyanska, Yuliya; Domingos, Idalina; Ferreira, José; Fragata, Anabela; Esteves, BrunoInvasive plants spread in such a way that they are threats to native species and to biodiversity. In this context, this work aims to determine possible valorizations of Scotch Broom Cytisus scoparius (L.) Link. This species harvested in the Viseu region was used in the present study. The eco-valorization of these renewable resources was made by conversion into liquid mixtures that can later be used in the manuf...
Extração de compostos fenólicos de caroço de cereja
Dulyanska, Yuliya; Guiné, Raquel P. F.; valente, Luisa; Esteves, Bruno; Ferreira, José; Domingos, Idalina; Correia, Paula; Ferreira, ManuelaOs resíduos agroalimentares provaram ser um biorecurso que pode ser usado para obter uma variedade de materiais, ingredientes e produtos químicos valiosos. Neste trabalho foram testadas as condições ótimas para extração de compostos bioativos dos caroços de cereja com diferentes solventes e temperaturas. Os critérios escolhidos basearam-se na capacidade de extração mais eficiente, buscando técnicas mais limpas ...
Extraction of Phenolic Compounds from Cherry Seeds: A Preliminary Study
Dulyanska, Yuliya; Cruz-Lopes, Luísa; Esteves, Bruno; Ferreira, José; Domingos, Idalina; Lima, Maria João; Correia, Paula; Ferreira, ManuelaAgri-food waste has proved to be a valuable bioresource that can be used to obtain a variety of valuable materials, ingredients and chemicals. The optimum conditions for extracting bioactive compounds from sweet cherry seeds (SCS) with different solvents and temperatures were tested in this work. The choice criteria were based on the most efficient extracting capacity while looking for cleaner techniques with l...