Naslov
Fast electrochemical determination of potential antioxidant capacity of marine and freshwater microalgae

Autori
Vadlja, Denis ; Galić, Maja ; Čižmek, Lara ; Babić, Sanja ; Topić Popović, Natalija ; Strunjak- Perović, Ivančica ; Čož-Rakovac Rozelinda

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

Izvornik
9th International Congress of Food Technologists, Biotechnologists and Nutritionists : Book of Abstracts / Kovačević Ganić, Karin ; Dragović-Uzelac, Verica ; Balbino, Sandra - Zagreb : Hrvatsko društvo prehrambenih tehnologa, biotehnologa i nutricionista, 2018, 109-109

ISBN
978-953-99725-7-6

Skup
9th International Congress of Food Technologists, Biotechnologists and Nutritionist

Mjesto i datum
Zagreb, Hrvatska, 03.10.2018. - 06.10.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
microalgae ; Dunaliella tertiolecta ; Chlorella vulgaris ; antioxidant capacity ; voltammetry of immobilized microparticles

Sažetak
Antioxidants are valuable molecules capable to inhibit possibly harmful oxidation, a chemical reaction whereby produced free radicals can damage cells and cause different diseases. To prevent cellular damage, marine and freshwater microalgae have developed antioxidant defence mechanisms and have attracted considerable attention as a promising source of natural antioxidants to replace synthetic antioxidants for food and chemical industry applications. The main goal of this study was to determine the difference in potential antioxidant capacities of marine algae Dunaliella tertiolecta and freshwater algae Chlorella vulgaris using fast electrochemical method named voltammetry of immobilized microparticles. This method allows determination of electroactive compounds in crystalline state without prior preparation of the sample. Aliquots of powdered dried algae were placed on a ceramic tile forming a spot of finely distributed material. Afterwards they were abrasively transferred to the surface of paraffin impregnated graphite electrode by rubbing the electrode rod with its lower circular surface on that spot of the sample. Measurements were preformed using cyclic and square-wave voltammetry in 0.1 M KNO3 on both tested samples with changing the experimental conditions (scan rate and frequency) for both techniques. In addition, changing the pH- value of electrolyte gave insight into to electrochemical mechanism of tested samples. For tested algae, different results were obtained which corresponds to their different antioxidant capacity

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Biotehnologija, Biotehnologija u biomedicini (prirodno područje, biomedicina i zdravstvo, biotehničko područje)

POVEZANOST RADA