Evaluation of drying methods and green extraction techniques to enhance the recovery of bioactive compounds from hop leaves: A sustainable approach for the valorisation of agricultural by-products.

ABSTRACT: This study investigated the effects of different drying techniques and green extraction methods on bioactive compounds in hop leaves, typically considered as waste material. Freeze-drying (FD) and oven-drying (OD) were compared for drying the leaves of five hop varieties, while the study focused on the use of microwave (MAE) and ultrasound (UAE) as innovative extraction techniques. The influence of these factors was then evaluated on several bioactive compounds, including polyphenols, flavonoids, pigments, and xanthohumol, as well as the antioxidant capacity and α-glucosidase inhibition of the extracts obtained. MAE yielded higher total polyphenol and flavan content (TPC and FLC, respectively) values than UAE. Similarly, FD samples showed higher TPC and FLC values than OD ones, whereas chl

SUBMITTER: Carbone K 

PROVIDER: S-EPMC11987633 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature