Browsing by Author "Quispe-Fuentes Issis"
Application of Vacuum and Convective Drying Processes for the Valorization of Pisco Grape Pomace to Enhance the Retention of its Bioactive Compounds
(2024/05/01) Poblete Jacqueline; Quispe-Fuentes Issis; Aranda Mario; Vega-Galvez Antonio
PurposeThe pisco produced in Chile is a distillate from pisco grape varieties, which generates a large amount of grape pomace. However, with the growing interest in reducing the environmental impact and converting these residues into novel by-products, the research and their evaluation in each stage can contribute significantly to ensuring their recovery. This study evaluated the kinetics of vacuum and convective drying from grape pomace at different temperatures and the influence on the retention of polyphenolic compounds and antioxidant activity as scalable alternatives for agro-industry.MethodsThe pisco grape pomace was dried by two drying methods at different temperatures: Vacuum drying (50-100 degrees C
Solar drying of flame seedless (Vitis vinifera l.) grape after different pretreatments: characterization of raisin's physicochemical and functional properties
(SPRINGER, 2023/06/01) Quispe-Fuentes Issis; Uribe U. Elsa; Vega-Galvez Antonio; Poblete G. Jacqueline; Olmos C. Antu; Pasten C. Alexis
Five different pretreatment strategies for the drying Flame seedless raisins were used: ultrasound, freezing, dipping in 0.05% NaOH solution, blanching, and enzymatic pretreatment. Results showed that the drying period for dipping pretreated grapes was reduced to less than half compared to Control grapes. The ultrasound pretreatment preserved the total phenolic content better