67 documents found, page 1 of 7
Modification of acorn starch structure and properties by high hydrostatic pressure
Castro, Luís M. G.; Caço, Ana I.; Pereira, Carla F.; Sousa, Sérgio C.; Brassesco, María E.; Machado, Manuela; Ramos, Óscar L.Despite being rich in starch, over half of acorn production is undervalued. High hydrostatic pressure was used to modify the properties of Q. pyrenaica (0.1 and 460 MPa for 20 min) and Q. robur (0.1 and 333 MPa for 17.4 min) acorn starches to obtain high-valued ingredients. Pressure significantly altered the span distribution and heterogeneity of the acorn starch granules depending on the species, but their mor...
Circular economyeast: saccharomyces cerevisiae as a sustainable source of gluca...
Sousa, Pedro; Tavares-Valente, Diana; Pereira, Carla F.; Pinto-Ribeiro, Inês; Azevedo-Silva, João; Madureira, Raquel; Ramos, Óscar L.; Pintado, ManuelaGlucans, a polysaccharide naturally present in the yeast cell wall that can be obtained from side streams generated during the fermentation process, have gained increasing attention for their potential as a skin ingredient. Therefore, this study focused on the extraction method to isolate and purify water-insoluble glucans from two different Saccharomyces cerevisiae strains: an engineered strain obtained from s...
Bleached hair as standard template to insight the performance of commercial hai...
Martins, Eva; Castro, Pedro; Ribeiro, Alessandra B.; Pereira, Carla F.; Casanova, Francisca; Vilarinho, Rui; Moreira, Joaquim; Ramos, Óscar L.The increasing demand for effective hair care products has highlighted the necessity for rigorous claims substantiation methods, particularly for products that target specific hair types. This is essential because the effectiveness of a product can vary significantly based on the hair’s condition and characteristics. A well-defined bleaching protocol is crucial for creating a standardized method to assess produ...
Obtention and characterization of microcrystalline cellulose from industrial me...
Gómez-García, Ricardo; Sousa, Sérgio C.; Ramos, Óscar L.; Campos, Débora A.; Aguilar, Cristóbal N.; Madureira, Ana R.; Pintado, ManuelaResidual melon by-products were explored for the first time as a bioresource of microcrystalline cellulose (MCC) obtention. Two alkaline extraction methods were employed, the traditional (4.5% NaOH, 2 h, 80 °C) and a thermo-alkaline in the autoclave (2% NaOH, 1 h, 100 °C), obtaining a yield of MCC ranging from 4.76 to 9.15% and 2.32 to 3.29%, respectively. The final MCCs were characterized for their chemical gr...
Bio-based superabsorbent hydrogels for nutrient release
Ribeiro, Alessandra B.; Moreira, Helena; Pereira, Sofia I. A.; Godinho, Mariana; Sousa, Ana Sofia da Silva; Castro, Paula; Pereira, Carla F.Drought is characterized by a low water precipitation rate, with strong impact on crop productivity, threatening global food production. In this context, the use of soil amendments, such as superabsorbent hydrogels constitute a potential technology for better water use efficiency and higher crop yields. In this work, we synthesised cellulose-based hydrogels, characterized their physical and functional propertie...
Modified cellulose nanocrystals encapsulating cannabigerol: a step forward in c...
Casanova, Francisca; Pereira, Carla F.; Ribeiro, Alessandra B.; Castro, Pedro M.; Martins, Eva; Freixo, Ricardo; Tavares-Valente, DianaCannabigerol (CBG) from Cannabis sativa L. is known for its anti-inflammatory, antibacterial, and antioxidant properties, showing potential against intestinal inflammation. However, its lipophilic nature limits its absorption and stability. Researchers have explored cellulose nanocrystals (CNCs) to deliver lipophilic compounds and enhance their biological outcomes. This study investigated the capability of modi...
Comparative study of green and traditional routes for cellulose extraction from...
Casanova, Francisca; Freixo, Ricardo; Pereira, Carla F.; Ribeiro, Alessandra B.; Costa, Eduardo M.; Pintado, Manuela E.; Ramos, Óscar L.Sugarcane bagasse (SCB) is the main residue of the sugarcane industry and a promising renewable and sustainable lignocellulosic material. The cellulose component of SCB, present at 40–50%, can be used to produce value-added products for various applications. Herein, we present a comprehensive and comparative study of green and traditional approaches for cellulose extraction from the by-product SCB. Green method...
Spent yeast waste streams as a sustainable source of bioactive peptides for ski...
Costa, Eduardo M.; Oliveira, Ana Sofia; Silva, Sara; Ribeiro, Alessandra B.; Pereira, Carla F.; Ferreira, Carlos; Casanova, Francisca; Pereira, Joana O.Spent yeast waste streams are a byproduct obtained from fermentation process and have been shown to be a rich secondary source of bioactive compounds such as phenolic compounds and peptides. The latter are of particular interest for skin care and cosmetics as they have been shown to be safe and hypoallergenic while simultaneously being able to exert various effects upon the epidermis modulating immune response ...
Bio-based superabsorbent hydrogels for nutrient-controlled release
Ribeiro, Alessandra B.; Moreira, Helena; Pereira, Sofia I. A.; Godinho, Mariana; Castro, Paula; Pereira, Carla F.; Casanova, Francisca; Freixo, RicardoThe drought is characterized by a low water precipitation rate, with strong impact on the crop productivity, threaten global food production. In this context, the use of soil amendments, such as superabsorbent hydrogels constitute a potential technology for water use efficiency and increase crop yields. In this work, it was synthesised a cellulose-based hydrogel, carrying out its characterisation, evaluated its...
Design of innovative biocompatible cellulose nanostructures for the delivery an...
Casanova, Francisca; Pereira, Carla F.; Ribeiro, Alessandra B.; Costa, Eduardo M.; Freixo, Ricardo; Castro, Pedro M.; Fernandes, João C.Poor aqueous solubility, stability and bioavailability of interesting bioactive compounds is a challenge in the development of bioactive formulations. Cellulose nanostructures are promising and sustainable carriers with unique features that may be used in enabling delivery strategies. In this work, cellulose nanocrystals (CNC) and cellulose nanofibers were investigated as carriers for the delivery of curcumin, ...