Digitalni repozitorijum
Univerziteta u Beogradu
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Ultrasound assisted extraction of rosehips Rosa canina L.
Jovanović, Aleksandra
Ćujić, Danica
Šavikin, Katarina
Živković, Jelena
Čutović, Natalija
Gnjatović, Marija
Bugarski, Branko
ABSTRACT In the present study, Rosa canina L. (Rosaceae) extracts were prepared using 0.75-2 mm particle size of rosehips, 70% ethanol, 1:100 g/mL solid-to-solvent ratio, and ultrasound probe (40% amplitude during 10 min and 50% amplitude during 15 min of ultrasound-assisted extraction). The extracts were characterized via analyzing total polyphenol content (TPC), antioxidant potential (ABTS assay), zeta potential, conductivity, pH, density, surface tension, and viscosity. TPC were 3.86±0.12 and 3.07±0.02 mg gallic acid equivalents (GAE)/g of plant material (40%, 10 min, and 50%, 15 min, respectively). ABTS radical scavenging activity was 1.76±0.01 and 1.43±0.01 mmol Trolox/g of plant material (40%, 10 min and 50%, 15 min, respectively). Zeta potential was -3.92±0.01 and -4.15±0.14 mV, conductivity was 0.073±0.001 and 0.064±0.001 mS/cm, while pH value was similar, 5.11 and 5.14 (40%, 10 min and 50%, 15 min, respectively). Density was 0.895±0.000 and 0.897±0.001 g/mL, the surface tension was 26.1±0.2 and 26.4±0.2 mN/m, whereas viscosity was 2.75±0.01 and 2.63±0.01 mPa·s (40%, 10 min and 50%, 15 min, respectively). Since the physical characteristics were similar in both extracts, while higher TPC and antioxidant potential were determined in the extract obtained at 40% of amplitude during 10 min of ultrasound-assisted extraction, this extract can be selected for further encapsulation and implementation into different food, pharmaceutical, and cosmetic products.
engleski
2022
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