Enhanced Oxidative Stability and Bioaccessibility of Sour Cherry Kernel Byproducts Encapsulated by Complex Coacervates with Different Wall Matrixes by Spray- and Freeze-Drying

Umit Altuntas; Gokce Altin-Yavuzarslan; Beraat Ozçelik

doi:10.1021/acsomega.3c02128

Enhanced Oxidative Stability and Bioaccessibility of Sour Cherry Kernel Byproducts Encapsulated by Complex Coacervates with Different Wall Matrixes by Spray- and Freeze-Drying

ACS Omega. 2023 Jun 23;8(26):23782-23790. doi: 10.1021/acsomega.3c02128. eCollection 2023 Jul 4.

Authors

Umit Altuntas^{1

2}, Gokce Altin-Yavuzarslan³, Beraat Ozçelik^{1

4}

Affiliations

¹ Food Engineering Department, Chemical and Metallurgical Engineering Faculty, Istanbul Technical University, 34469 Istanbul, Türkiye.
² Food Engineering Department, Faculty of Engineering and Natural Sciences, Gümüşhane University, 29100 Gümüşhane, Türkiye.
³ Molecular Engineering & Sciences Institute, University of Washington, 3946 W Stevens Way NE, Seattle, Washington 98105, United States.
⁴ BIOACTIVE Research and Innovation Food Manufac. Indust. Trade Ltd., Teknokent ARI-3, B110, 34467 Istanbul, Turkey.

Abstract

Sour cherry (Prunus cerasus L.) seeds are obtained as byproducts of the processing of sour cherries into processed foods. Sour cherry kernel oil (SCKO) contains n-3 PUFAs, which may provide an alternative to marine food products. In this study, SCKO was encapsulated by complex coacervates, and the characterization and in vitro bioaccessibility of encapsulated SCKO were investigated. Complex coacervates were prepared by whey protein concentrate (WPC) in combination with two different wall materials, maltodextrin (MD) and trehalose (TH). Gum Arabic (GA) was added to the final coacervate formulations to maintain droplet stability in the liquid phase. The oxidative stability of encapsulated SCKO was improved by drying on complex coacervate dispersions via freeze-drying and spray-drying. The optimum encapsulation efficiency (EE) was obtained for the sample 1% SCKO encapsulated with 3:1 MD/WPC ratio, followed by the 3:1 TH/WPC mixture containing 2% oil, while the sample with 4:1 TH/WPC containing 2% oil had the lowest EE. In comparison with freeze-dried coacervates containing 1% SCKO, spray-dried ones demonstrated higher EE and improved oxidative stability. It was also shown that TH could be a good alternative to MD when preparing complex coacervates with polysaccharide/protein networks.