scholarly journals Extraction of phenolic compounds from oregano using high voltage electrical discharges – sustainable perspective

2021 ◽  
Author(s):  
Marinela Nutrizio ◽  
Anet Režek Jambrak ◽  
Tonči Rezić ◽  
Ilija Djekic
Keyword(s):  
Phenolic Compounds ◽  
High Voltage ◽  
Electrical Discharges

scholarly journals Phenolic and Antioxidant Analysis of Olive Leaves Extracts (Olea europaea L.) Obtained by High Voltage Electrical Discharges (HVED)

Foods ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 248 ◽  
Author(s):  
Irena Žuntar ◽  
Predrag Putnik ◽  
Danijela Bursać Kovačević ◽  
Marinela Nutrizio ◽  
Filip Šupljika ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
High Voltage ◽  
Near Infrared ◽  
Green Technology ◽  
Total Phenolic ◽  
Green Solvents ◽  
Electrical Discharges ◽  
Olive Leaves ◽  
Significant Difference

Background: The aim of this study was to evaluate high voltage electrical discharges (HVED) as a green technology, in order to establish the effectiveness of phenolic extraction from olive leaves against conventional extraction (CE). HVED parameters included different green solvents (water, ethanol), treatment times (3 and 9 min), gases (nitrogen, argon), and voltages (15, 20, 25 kV). Methods: Phenolic compounds were characterized by ultra-performance liquid chromatography-tandem mass spectrometer (UPLC-MS/MS), while antioxidant potency (total phenolic content and antioxidant capacity) were monitored spectrophotometrically. Data for Near infrared spectroscopy (NIR) spectroscopy, colorimetry, zeta potential, particle size, and conductivity were also reported. Results: The highest yield of phenolic compounds was obtained for the sample treated with argon/9 min/20 kV/50% (3.2 times higher as compared to CE). Obtained results suggested the usage of HVED technology in simultaneous extraction and nanoformulation, and production of stable emulsion systems. Antioxidant capacity (AOC) of obtained extracts showed no significant difference upon the HVED treatment. Conclusions: Ethanol with HVED destroys the linkage between phenolic compounds and components of the plant material to which they are bound. All extracts were compliant with legal requirements regarding content of contaminants, pesticide residues and toxic metals. In conclusion, HVED presents an excellent potential for phenolic compounds extraction for further use in functional food manufacturing.

Testing High-Voltage Electrical Discharges in Disintegrating Claystone for Isotopic and Mineralogical Studies: an Example Using Opalinus Claystone

2017 ◽  
Vol 65 (5) ◽  
pp. 342-354 ◽  
Author(s):  
Horst Zwingmann ◽  
Alfons Berger ◽  
Urs Eggenberger ◽  
Andrew Todd ◽  
Marco Herwegh
Keyword(s):  
High Voltage ◽  
Electrical Discharges

scholarly journals Green extraction of polyphenols from grapefruit peels using high voltage electrical discharges, deep eutectic solvents and aqueous glycerol

2019 ◽  
Vol 295 ◽  
pp. 165-171 ◽  
Author(s):  
Sally El Kantar ◽  
Hiba N. Rajha ◽  
Nadia Boussetta ◽  
Eugène Vorobiev ◽  
Richard G. Maroun ◽  
...  
Keyword(s):  
High Voltage ◽  
Deep Eutectic Solvents ◽  
Electrical Discharges ◽  
Green Extraction

Effect of high voltage electrical discharges on filtration properties of Saccharomyces cerevisiae yeast suspensions

2010 ◽  
Vol 346 (2) ◽  
pp. 288-295 ◽  
Author(s):  
M. Loginov ◽  
N. Lebovka ◽  
O. Larue ◽  
M. Shynkaryk ◽  
M. Nonus ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
High Voltage ◽  
Electrical Discharges ◽  
Filtration Properties
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