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Filters: tag: Antioxidant Activity Clear

Investigation of the Effects of 2.45 GHz Near-Field EMF on Yeast

Research RF Safe Research Library Jan 1, 2025

This in vitro study exposed yeast suspensions to 2.45 GHz near-field microwave radiation at 2 cm and 4 cm for 20 or 60 minutes. It reports oxidative-stress-related changes (reduced antioxidant activity with increased membrane permeability) after 20 minutes at 2 cm, an effect not reproduced by conventional heating.…

Seed Treatment with Electromagnetic Field Induces Different Effects on Emergence, Growth and Profiles of Biochemical Compounds in Seven Half-Sib Families of Silver Birch.

Research RF Safe Research Library Jan 1, 2023

This study evaluated a short (1 min) electromagnetic field (EMF) seed treatment in seven half-sib families of silver birch and assessed emergence, growth, and leaf biochemical profiles in one- and two-year-old seedlings. The abstract reports genotype- and age-dependent responses, with some families showing…

The Potential of Cold Plasma and Electromagnetic Field as Stimulators of Natural Sweeteners Biosynthesis in Bertoni.

Research RF Safe Research Library Jan 1, 2022

This plant study evaluated whether short pre-sowing treatments with cold plasma or an electromagnetic field alter sweetener-related metabolites in stevia leaves. The authors report modest improvements in germination and a strong stimulation of steviol glycoside accumulation, with a larger increase in stevioside than…

Biodegradable, pH-sensitive chitosan beads obtained under microwave radiation for advanced cell culture.

Research RF Safe Research Library Jan 1, 2018

This in vitro study describes microwave-assisted, green-chemistry synthesis of pH-sensitive chitosan beads crosslinked with a glutamic acid/1,5-pentanodiol mixture and optionally modified with Tilia platyphyllos extract. The beads were characterized (FT-IR, SEM), tested for swelling, pH sensitivity, antioxidant…

The beneficial effect of ginsenosides extracted by pulsed electric field against hydrogen peroxide-induced oxidative stress in HEK-293 cells.

Research RF Safe Research Library Jan 1, 2017

This in vitro study compared ginsenosides extracted using pulsed electric field (PEF) versus solvent cold soak extraction (SCSE). The abstract reports that PEF extracts had higher antioxidant capacity and provided greater protection against hydrogen peroxide-induced oxidative stress in HEK-293 cells, including…

Quality stability and sensory attributes of apple juice processed by thermosonication, pulsed electric field and thermal processing.

Research RF Safe Research Library Jan 1, 2017

This study compared thermosonication, pulsed electric field, and thermal processing for preserving Royal Gala apple juice and evaluated sensory attributes and quality stability during 30 days of storage at 3°C and 20°C. Thermosonication and pulsed electric field produced juices with different taste compared with…

[The specific features of the development of metabolic and regenerative processes under the action of low-intensity electromagnetic radiation in radiation exposure conditions (an experimental study)].

Research RF Safe Research Library Jan 1, 2017

This animal experimental study reports that low-intensity ultrahigh-frequency electromagnetic radiation and a low-intensity low-frequency magnetic field, applied after radiation exposure, enhanced metabolic and regenerative processes in rat testes and liver. The magnetic field was associated with increased…

Application of pulsed electric field in the production of juice and extraction of bioactive compounds from blueberry fruits and their by-products.

Research RF Safe Research Library Jan 1, 2015

This study investigated pulsed electric field (PEF) pre-treatment of blueberries and its impact on juice production and recovery of bioactive compounds from press cake. PEF at 1–5 kV/cm (10 kJ/kg) increased juice yield and increased phenolics, anthocyanins, and antioxidant activity in juice compared with untreated…

Analysis of DPPH inhibition and structure change of corn peptides treated by pulsed electric field technology.

Research RF Safe Research Library Jan 1, 2015

This laboratory study evaluated how pulsed electric field (PEF) processing affects antioxidant activity and structure of 10–30 kDa corn peptides. Antioxidant activity was assessed via DPPH inhibition and optimized using response surface methodology. Under reported optimal conditions (10 mg/mL, 15 kV/cm, 2,000 Hz),…

Effects of ultraviolet irradiation, pulsed electric field, hot water and ethanol vapours treatment on functional properties of mung bean sprouts.

Research RF Safe Research Library Jan 1, 2014

This study examined how pulsed electric field, hot water dip, ethanol vapours, and UV irradiation affected antioxidant-related properties of mung bean sprouts during storage at room and low temperatures. Ethanol vapour-treated sprouts had the highest ascorbic acid, total phenols, and antioxidant activity. Polyphenol…

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