Browsing by Author "García, Paula"

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    A Feasible Approach to Developing Fiber-Enriched Bread Using Pomegranate Peel Powder: Assessing Its Nutritional Composition and Glycemic Index
    (2023) García, Paula; Bustamante, Andrés; Echeverría González, Francisca Cecilia; Encina, Cristian; Palma, Manuel; Sanhueza, Leyla; Sambra, Verónica; Pando, Maria Elsa; Jiménez, Paula
    The consumption of dietary fiber (DF) has been associated with a reduced incidence of non-communicable diseases. Despite various strategies implemented worldwide to increase DF intake, it remains low. Therefore, the development of new fiber-rich food products that are widely consumed could be a strategy to improve DF intake. In this study, an agro-industrial by-product, pomegranate peel powder (PPP), was used as an innovative source of DF and antioxidant. The objective was to develop a bread enriched with DF, antioxidants, and sensory characteristics by partially replacing wheat flour (WF) with PPP at levels of 0%, 2.5%, 5%, 7.5%, and 10%. Bread with 2.5% and 5% PPP was chosen for a clinical trial to evaluate glycemic response (GR) in healthy subjects and determine the bread’s glycemic index (GI). As the percentage of PPP increased, both the DF and total polyphenol content increased significantly. The highest overall acceptability was achieved with bread containing up to 5% PPP. Consumption of bread with 2.5% and 5.0% PPP significantly reduced the GI compared to the control bread, while the decrease in GR was not significant. PPP could be a potential food and low-cost ingredient to improve the bread’s nutritional quality through its contribution to DF and antioxidants.
  • Thumbnail Image
    Item
    Alpha-tocopherol microspheres with cross-linked and acetylated inulin and their release profile in a hydrophilic model
    (2013) García, Paula; Vega, Juan; Jiménez, Paula; Santos Blanco, José Guillermo; Robert, Paz
    Alpha-tocopherol (AT) was encapsulated with native (NIn), acetylated (AIn) or cross-linked (CIn) inulin (two degrees each) by spray-drying. A face central composite experimental design for each system (AT–NIn, AT–AIn1, AT–AIn2, AT–CIn1, and AT–CIn2) was evaluated to determine the influence of inlet air temperature and AT/coating material ratio on the AT encapsulation percentage (EP). The AT microspheres obtained under optimal conditions were characterized determining the AT EP, morphology and their release profile in a hydrophilic system. The AT encapsulating percentage reached values above 86% in all the systems studied. The acetylation and cross-linking of inulin improved slight but significantly the AT encapsulating percentage respect to native inulin. The release profiles showed biphasic behavior, being the first and second zone attributed to uncovered and encapsulated AT, respectively. The AT release was <15% (0–540 min) from all AT-inulin microparticles, corresponding mainly to superficial AT release, following Higuchi model consistent with a diffusional mechanism. AT release rate constant from AT–NIn microspheres was significantly lower than those of AT–AIn and AT–CIn. The AT release pattern suggest that the microparticles could be applied in the design of functional foods, preserving the nutritional role of AT.
  • Thumbnail Image
    Item
    Drying and preservation of polyphenols
    (CRC Press, Taylor and Francis Group, 2017) Fredes González, Carolina Paz; García, Paula; Robert, Paz; Cuevas-Valenzuela, José et al.
    Polyphenol-rich species have long been thought to have considerable health benets mainly due to their total antioxidant activity against cellular oxidation reactions (Bouaziz et al., 2009; Janicsak et al., 2010; Xia et al., 2010). Moreover, cardioprotective (Cale et al., 2010; Xia et al., 2010), antimicrobial (Bouaziz et al., 2009; Xia et al., 2010), anticancer, and anti-inammatory (Xia et al., 2010) properties have also been reported in both animal and in vitro models. These benets have stimulated regular research regarding the phenolic status and antioxidant activity of various plant species and new ecotypes varieties in different countries.
  • Thumbnail Image
    Item
    Manejo Clínico de Escabiosis. Orientación técnica 2023
    (2023) Gallegos, Doris; Valenzuela, Karen; Silva, Nathalie; Cortés, Daniela; Kraemer, Patricia; Aedo, Fabiola; Palominos, Cecilia; Navarro, Deborah; García, Paula; Paiva, Francisco; Moya, Macarena; Medel, María Paz; Contreras, Patricia; Contreras, Patricia; Torres Hidalgo, Marisa