Browsing by Author "Ortiz, Jaime"

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    Revalorización de residuos de arándano: Extracción polifenólica con tecnologías emergentes y convencionales
    (2024) Reinoso, Yessenia; Herrera, Edgar; Ortiz, Jaime; Echeverría González, Francisca Cecilia; Bustamante, Andrés
    The blueberry juice industry generates residues after processing the fruit that could negatively impact the environment. However, blueberry by-products are rich in phenolic compounds, especially anthocyanins, which have shown positive health effects. Therefore, its revalorization for the formulation of functional ingredients becomes interesting. However, obtaining bioactive compounds from blueberry waste depends mainly on technology. Our objective is to discuss the effect of different conventional and emerging extraction technologies, such as ultrasound-assisted extraction, accelerated solvent extraction, and supercritical-CO2 extraction, in obtaining polyphenolic compounds from blueberry residues. As result, both conventional and emerging methods effectively recover polyphenolic compounds from the blueberry residue (Vaccinium spp.). However, extraction with emerging methods has other advantages since they are considered friendly to the environment by consuming less energy and using suitable solvents for the food industry.
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    Sensory descriptors for three edible Chilean seaweeds and their relations to umami components and instrumental texture
    (2022) Figueroa, Valentina; Bunger, Andrea; Ortiz, Jaime; Miguel Aguilera, Jose
    Although seaweeds exhibit many benefits as a food source, few studies have characterized their sensory attributes. An expert nine-member panel developed a vocabulary with 25 descriptors to describe the appearance, aroma, flavor, texture, and aftertaste of raw and cooked seaweeds consumed in Chile: Durvillaea antarctica, Pyropia spp., and Ulva lactuca. Subsequently, the vocabulary was used in a ranking descriptive analysis (RDA) to evaluate the sensory properties and relate them with physicochemical and physical data. Sensory attributes of the three seaweeds were very different from each other but similar between treatments (raw and cooked). Pyropia spp., both cooked and hydrated, had the highest glutamate content (310 and 324 mg (100 g)(-1) d.w., respectively), and was perceived by the sensory panel as having the most umami taste. Cooked D. antarctica was perceived as sweeter, had more caramel notes than the hydrated seaweed and was sensed as cartilaginous and hard in accordance with its mechanical properties. Generalized Procrustes analysis revealed that D. antarctica exhibited most of the desirable descriptors, such as caramel, umami and marine aromas while U. lactuca was described as bitter and moldy. This primary vocabulary can assist food scientists and chefs in the development of seaweed products and dishes for the consumer market.