Naslov
Monitoring the stability of bioactive compounds in strawberry juice treated by high power ultrasound through chemometrics

Autori
Putnik, Predrag ; Bebek Markovinović, Anica ; Bičanić, Paula ; Bursać Kovačević, Danijela

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

Izvornik
Book of Abstracts of the 4th International Congress on “Green Extraction of Natural Products” (GENP2022) / Karlović, Sven ; Dujmić, Filip ; Ninčević Grassino, Antonela - Zagreb : Prehrambeno-biotehnološki fakultet Sveučilišta u Zagrebu, 2022, 45-45

ISBN
978-953-6893-16-4

Skup
4th International Congress on Green Extraction of Natural Products (GENP2022)

Mjesto i datum
Poreč, Hrvatska, 27.10.2022. - 28.10.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
strawberry juice ; high power ultrasound ; chemometrics ; bioactive compounds ; storage

Sažetak
Fruit juices are short-lived products and thermal pasteurization ensures their storage, even if this reduces their quality. Alternatively, non-thermal processing at shorter times is also able to extend their shelf-life while maintaining nutritional and sensory value (e.g. measured by stability of bioactive compounds ; BACs). For instance, use of highpower ultrasound (HPU) has great potential as acoustic energy is transmitted instantly through the entire juice volume, thus significantly reducing treatment time and heat exposure. Chemometrics is statistical approach able to provide conclusions from large datasets with utilisation of various multivariate analysis. Hence the aim of this work was to employ chemometrics for choosing HPU parameters for juice processing while monitoring BACs stability during storage as measure of nutritive value (total phenols, monomeric anthocyanins, hydroxycinnamic acids, flavonols, and condensed tannins). Extracted strawberry juices at two ripening stages (75% vs. 100%) were subjected to HPU, with varying the amplitude (25, 50, 75, and 100%), pulse (50 and100%), and treatment duration (5 and 10 min) that were stored at 4 ℃ for 7 days. The samples were firstly analysed by exploratory hierarchical Ward's cluster analysis. Samples with different ripeness, pulse, amplitude, treatment duration, content of all bioactive compounds, SSC (%), and pH, showed that ripeness of 100%, a pulse of 50%, an amplitude of 50%, and treatment durations of 5 and 10 min were the most similar to the controls. Other samples, that were similar to controls had maturity of 100%, a pulse of 100%, an amplitude of 25%, and a treatment duration of 5 minutes. HPU samples had similar contents of all polyphenolic groups except condensed tannins (they were higher for HPU samples). Since temperature changes are essential for the retention of majority of bioactives, it was observed how ΔT associated with the HPU parameters (ΔT was strongly positively associated with all HPU parameters). The only exception was the HPU time, with same pattern as the other HPU parameters, except that the correlation was slightly weaker. In conclusion, HPU showed significant potential for industrial juice production.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA