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Chemical Engineering Journal
Volume 464, 2023, 142560

One positive part of copper ion on biocatalysts: CNPs@Cu-Trypsin-assisted aqueous extraction technique for simultaneous exploration of edible insect oil and protein

Vladislava Nebrigica, Aleksandra Cvetanovic Kljakica, Gokhan Zenginb

Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia.

Abstract

In this study, the impact of different drying processes, conventional air-drying (S) and freeze drying (F), on biochemical composition and biological activity of extracts of Helichrysum italicum obtained by using traditional (maceration- MAC) and modern extraction techniques (ultrasound (UAE) and microwave (MAE) extraction) was screened. The total phenol content of examined extracts yield in range of 49.7–119.77 mg GAE/g, while total flavonoid content yield in range of 2.92–21.96 mg RE/g. Qualitative and quantitative analysis showed that rutin and quercetin are the components that are present in all extracts in high amount. Radical scavenging activity was confirmed by DPPH and ABTS tests, and reduction ability by FRAP and CUPRAC tests. Total antioxidant activity and chelating ability of the extracts were also confirmed. While ethanol extracts (E) exhibited higher anti-acetylcholinesterase, water extracts (W) were more active in butyrylcholinesterase enzyme inhibition. All extracts were found to inhibit tyrosinase, amylase and glucosidase enzymes. Microwave extraction technique was found to be better extraction technique and air-drying more effective drying process for isolation of phenolic compounds and biological activity of Helichrysum italicum.

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