This study aimed to evaluate the physicochemical properties and storage stability of microencapsulated DHA-rich oil spray dried with different wall materials: model 1 (modified starch, gum arabic, and maltodextrin), model 2 (soy protein isolate, gum arabic, and maltodextrin), and model 3 (casein, glucose, and lactose). The results indicated that model 3 exhibited the highest microencapsulation efficiency (98.66 %) and emulsion stability (>99 %), with a moisture content and mean particle size of 1.663 % and 14.173 μm, respectively. Differential scanning calorimetry analysis indicated that the Tm of DHA-rich oil microcapsules was high, suggesting that the entire structure of the microcapsules remained stable during thermal processing. A thermogravimetric analysis curve showed that the product lost 5 % of its weight at 172 °C and the wall material started to degrade at 236 °C. The peroxide value of microencapsulated DHA-rich oil remained at one ninth after accelerated oxidation at 45 °C for 8 weeks to that of the unencapsulated DHA-rich oil, thus revealing the promising oxidation stability of DHA-rich oil in microcapsules.
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This study was supported by the International Cooperation Project (Grant No. 2014DFA61040), the Youth Innovation Promotion Association CAS, and the Hi-Tech Research and Development Program (863) of China (Grant No. 2014ARA021701).
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Chen, W., Wang, H., Zhang, K. et al. Physicochemical Properties and Storage Stability of Microencapsulated DHA-Rich Oil with Different Wall Materials. Appl Biochem Biotechnol 179, 1129–1142 (2016). https://doi.org/10.1007/s12010-016-2054-3