| Title | Antioxidant Compound Adsorption in Polyvinylpolypyrrolidone from Chilean Carmenere, Cabernet Sauvignon, and Merlot Grape Pomaces as Potential By-Products |
|---|---|
| ID_Doc | 9512 |
| Authors | Díaz, N; Aqueveque, PM; Vallejos-Almirall, A; Radrigán, R; Zúñiga-López, MC; Folch-Cano, C |
| Title | Antioxidant Compound Adsorption in Polyvinylpolypyrrolidone from Chilean Carmenere, Cabernet Sauvignon, and Merlot Grape Pomaces as Potential By-Products |
| Year | 2022 |
| Published | Antioxidants, 11.0, 10 |
| Abstract | Grape pomace (GP) is a by-product resulting from the winemaking process and its potential use as a source of bioactive compounds is well known. The GP bioactive compounds can be retained in the well-known polyvinylpolypyrrolidone (PVPP), industrially used in the clarification and stabilization of wine and other drinks. Thus, the polyphenolic compounds (PC) from the Chilean Carmenere, Cabernet Sauvignon, and Merlot GP were extracted, and their compositions and antioxidant capacities (ORAC-FL) were determined. In addition, the retention capacity of the PC on PVPP (PC-PVPP) was evaluated. The bioactivities of GP extracts and PC-PVPP were estimated by the agar plate inhibition assay against pathogenic microorganisms. Results showed a high amount of TPC and antioxidant capacity in the three ethanolic GPs extracts. Anthocyanins, flavan-3-ol, and flavonols were the most abundant compounds in the GP extract, with retentions between 70 and 99% on PVPP. The GP extracts showed inhibition activity against B. cereus and P. syringae pv. actinidiae but the GP-PVPP had no antimicrobial activity. The high affinity of the identified PCs from GPs on PVPP polymer could allow the design of new processes and by-products for the food or cosmeceutical industry, promoting a circular economy by reducing and reusing wastes (GPs and PVPP) and organic solvents. |
| https://www.mdpi.com/2076-3921/11/10/2017/pdf?version=1666053863 |
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