Optimization and release kinetics of Stevia rebaudiana aqueous extracts from alginate-based microparticles (CROSBI ID 707266)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Marijan, Marijan ; Kolar, Sara ; Jurić, Slaven ; Vlahoviček-Kahlina, Kristina ; Vinceković, Marko
engleski
Optimization and release kinetics of Stevia rebaudiana aqueous extracts from alginate-based microparticles
Stevia rebaudiana (Bertoni) represents a natural source of polyphenolic compounds. The extraction of polyphenols in aqueous medium from stevia leaves powder was achieved using an ultrasound-assisted extraction technique. Optimization of the extraction procedure was performed using response surface methodology and was used to determine optimal conditions (6 g L-1, 75A and 6 min) for extraction in terms of total polyphenolic compounds content (465.17 mg L-1). Optimal extracts were used for the preparation of calcium-alginate and calcium-alginate/casein microparticles. Release kinetics were observed as a cumulative release (%) of total polyphenolic compounds from dry microparticles. Both kinetics curves showed a similar release pattern with a significantly higher maximum cumulative release for calcium-alginate microparticles. The microcapsules were also compared based on different parameters such as encapsulation efficiency (EE %), loading capacity (LC), relative size and swelling degree both in water and acidic medium. Calcium-alginate/casein microparticles showed enhanced results in comparison with calcium-alginate microparticles with higher EE % (5.3%), LC (44.3%) and size (11.9%) values for 1 mm nozzle. Similar results were obtained for 0.75 mm nozzle with increased values of EE % (8.2%), LC (248.4%) and particle size (10.1%). The obtained results showed that there is a significant influence of different matrices on the physicochemical properties of microparticles.
extraction, optimization, encapsulation, Stevia rebaudiana, microparticles
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Podaci o prilogu
165-165.
2021.
objavljeno
Podaci o matičnoj publikaciji
56. HRVATSKI I 16. MEĐUNARODNI SIMPOZIJ AGRONOMA
Rožman, Vlatka ; Antunović, Zvonko
Osijek:
2459-5543
Podaci o skupu
56. hrvatski i 16. međunarodni simpozij agronoma
poster
05.09.2021-10.09.2021
Vodice, Hrvatska