Dukić, Josipa; Režek Jambrak, Anet; Jurec, Jurica; Merunka, Dalibor; Valić, Srećko; Radičić, Rafaela; Krstulović, Nikša; Nutrizio, Marinela; Dubrović, Igor (2025) High-Power Ultrasound and High-Voltage Electrical Discharge-Assisted Extractions of Bioactive Compounds from Sugar Beet (Beta vulgaris L.) Waste: Electron Spin Resonance and Optical Emission Spectroscopy Analysis. Molecules, 30 (4). ISSN 1420-3049
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Abstract
To achieve sustainable extractions, this study examines the impact of different extraction methods to utilize waste from the sugar industry. In addition to conventional thermal extraction, the impact of high-power ultrasound (US) and high-voltage electrical discharge (HVED)-assisted extractions on the yield of bioactive compounds and the antioxidant capacity (AC) value of sugar beet leaf extracts was determined. US extraction proved to be an excellent method for extracting bioactive compounds, while HVED extraction proved to be an excellent method for extracting Vitexin. AC was measured both spectrophotometrically (DPPH and FRAP) and spectroscopically via electron spin resonance (ESR). The AC results correlate with each other, and the highest AC values were found in the US-treated samples with 25% ethanol solution as the extraction solvent. Characterization of the plasma via optical emission spectroscopy (OES) showed that neither the solvent nor the sample influenced the plasma spectra, only the gas used (nitrogen/argon). All of the obtained results provide an excellent basis for future research into the utilization of food waste and by-products.
| Item Type: | Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Uncontrolled Keywords: | high-voltage electrical discharge; high-power ultrasound; sugar beet leaves; bioactive compounds; antioxidant capacity; electron spin resonance spectroscopy; optical emission spectroscopy | ||||||||
| Subjects: | BIOTECHNICAL SCIENCES > Biotechnology | ||||||||
| Divisions: | Division of Physical Chemistry | ||||||||
| Projects: |
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| Depositing User: | Lorena Palameta | ||||||||
| Date Deposited: | 26 Jun 2025 13:02 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/9880 | ||||||||
| DOI: | 10.3390/molecules30040796 |
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