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    The role of skin-contact time and heads fraction on Pisco terpene content
    (2025-07-01)
    Pisco is a traditional Peruvian spirit, and Muscat of Alexandria (“Italia”) is amongst the main grape varieties used to produce it. Pisco production is mainly artisanal and varies widely across regions and producers; more information is needed on the impact of different operations on its composition. This study demonstrated the effect of changes in skin-contact duration and the amount of “head fraction” discarded on terpene content to guide producers during Pisco manufacturing.
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    Highly Efficient Ultrasound-Assisted Anthocyanin Extraction for Colorimetric Sensors and Drug Delivery Systems in Wound Dressings
    (Springer Science and Business Media Deutschland GmbH, 2025)
    Anthocyanins were extracted from Peruvian purple cabbage (PC) using ultrasonication, a greener and more efficient technique. The anthocyanin extract was incorporated into polymeric alginate membranes to obtain a pH-sensitive biosensor to monitor wound healing processes and drug delivery. The halochromic behavior was tested in five different acidic media (pH 4, 5, 6, 7, and 8) giving a differential colour for each. The antioxidant capacity of the PC extract was evaluated using the ABTS discoloration assay. A 1% (w/v) solution of the lyophilized extract resulted in 55.17 ± 0.46 TEAC mg/g. Phenolic content and equivalents of cyanidin-3-glucoside were evaluated using the Folin-Ciocalteu and pH differential assays, respectively, resulting in 36.1 ± 0.55 GAE mg and 8.63 ± 0.54 of C-3-G mg per gram of lyophilized extract, respectively. Finally, the PC extract was embedded in alginate (AL) membranes and characterized by contact angle and transparency.
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