Bioactive properties of different extracts obtained from the aerial parts of blueberry and raspberry raw materials

The waste biomass derived from Berry crops is a new focus of study since producers are becoming increasingly interested in its valorisation, namely to obtain high added-value products. In this context, the leaves, and other aerial parts of this raw material, are examples of waste biomass that can be exploited for several applications, namely in cosmetic formulations due to their unique chemical composition and associated bioactive properties [1,2]. In this context, this work was focused on upgrading the commercial potential of blueberry and raspberry plant by-products, which are typically discarded, presenting no economic value. Different extracts of Vaccinium myrtillus L. (blueberry) and Rubus idaeus L. (raspberry) aerial parts were obtained using green methodologies after being air-dried, grounded at 20 mesh, and protected from light. Different extraction techniques were applied, such as infusion, decoction, maceration, and ultrasoundassisted extraction (UAE), being the latter two extractions performed with EtOH:H2O (80:20 v/v) as the extraction medium. The obtained extracts were studied regarding their antioxidant and antimicrobial properties through the oxidative haemolysis inhibition assay (OxHLIA) and the microdilution method against pathogenic bacteria, respectively.

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