Valorization of artichoke industrial by-products using green extraction technologies: Formulation of hydrogels in combination with paulownia extracts

Gabriela Órbenes, Paula Rodríguez-Seoane, María Dolores Torres, ROLANDO ARTURO CHAMY MAGGI, María Elvira Zúñiga, Herminia Domínguez

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The integral valorization of artichoke bracts generated during industrial canning of artichoke was assessed. The extraction of bioactive compounds was addressed with pressurized hot water under subcritical conditions. The performance of this stage on the extraction of phenolics with antioxidant properties and the saccharidic fraction using conventional and microwave heating was compared. The microwave assisted process was more efficient than the conventional one regarding extraction yields of total solubles, and glucose and fructose oligomers and phenolics, because lower operational temperatures and shorter times were needed. Degradation of fructose oligomers was observed at temperatures higher than 160 °C, whereas the maximal phenolic content occurred at 220 °C. Both the extracts and the residual solids, obtained at conditions leading to maximum phe-nolics yields, were evaluated for the production of starch-based hydrogels, supplemented with Pau-lownia leaves’ aqueous extracts.

Original languageEnglish
Article number4386
JournalMolecules
Volume26
Issue number14
DOIs
StatePublished - 2 Jul 2021
Externally publishedYes

Keywords

  • Antiradical properties
  • Autohydrolysis
  • microwave
  • Rheometry
  • Saccharidic fraction

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