Naslov
Antioxidant Activity of hydrosol extracts from Veronica species

Autori
Nazlić, Marija ; Akrap, Karla ; Kremer, Dario ; Dunkić, Valerija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
The First International Conference on Antioxidants: Sources, Methods, Health Benefits, and Industrial Applications / Barcelona, Španjolska - Barcelona : Ica2023.sciforum.net #Antioxidants2023, 2023, 100-100

Skup
The First International Conference on Antioxidants: Sources, Methods, Health Benefits, and Industrial Applications

Mjesto i datum
Barcelona, Španjolska, 12.05.2023. - 15.05.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
hydrosol ; hydrodistillation ; microwave extraction ; Veronica ; volatiles ; antioxidant activity

Sažetak
Free volatile compounds (FVCs) were isolated in water fractions (hydrosols) of five Croatian Veronica species obtained by hydrodistillation (HD) and microwave-assisted extraction (MAE). These extraction methods yield two layers, the lipophilic layer (LL), or essential oil, and the aqueous layer (hydrosols). Hydrosols are aromatized waters produced by condensation of water vapor in distillation processes that contain volatiles, water-soluble components, and are, therefore, safer for human use compared to components from lipophilic phase. In general, research on the aroma profiles of hydrosols and their biological efficacy is still limited. Composition of volatile compounds and antioxidant activity of hydrosols for five species is presented in this research: V. cymbalaria, V. hederifolia, V. officinalis, V. persica, and V. polita. The compounds β-ionone, benzene acetaldehyde, (E)-caryophyllene, and caryophyllene oxide were detected in all five Veronica hydrosols studied. (E)-β-Damascenone is significantly present in all isolates except MAE isolates of V. cymbalaria. Hydrosols from both extraction techniques were tested by two methods: ORAC and DPPH. V. officinalis had the highest activity in ORAC for both extraction methods (217.54 ± 14.98 µmol TE/mL for HD extraction and 359.9 ± 44.40 µmol TE/mL for MAE). Considering that both extraction methods isolated the same major constituents, our results suggest that microwave extraction is a good alternative for the extraction of FVCs. This conclusion is partly supported with the results for antioxidant activity, according to which hydrosols for four out of five investigated species resulted in better activity for MAE extracts for ORAC method. Comparing the tested antioxidant activity of all hydrosols, it can be concluded that besides V. officinalis (which is generally known for showing good results for in vitro biological tests of its extracts), V. cymbalaria also showed higher antioxidant activity than other tested species. Further research should be based on the study of other biological activities of these extracts for possible pharmaceuticals use.

Izvorni jezik
Engleski

POVEZANOST RADA