Figures & data
Figure 1. Micrographs of rose anthocyanin microcapsules with GA and MD by spray-drying and freeze-drying. (a): spray-dried powders (magnification of 2000×); (b): spray-dried powders (magnification of 5000×); (c): freeze-dried powders (magnification of 1000×); (d): freeze-dried powders (magnification of 2000×)
Table 1. Average volume diameter, average surface area diameter and particle size distribution (Span) of the rose anthocyanin microcapsules with GA and MD by spray-drying and freeze-drying
Table 2. Physical properties of the rose anthocyanin extracts and microcapsules with GA and MD by spray-drying and freeze-drying
Table 3. Anthocyanin contents (ACN), total phenolic contents (TPC), and antioxidant activity (by scavenging DPPH radical, OH radical and reducing Fe3+) of the rose anthocyanin extracts and microcapsules with GA and MD by spray-drying and freeze-drying
Figure 2. Thermal degradation kinetics of rose anthocyanins vs temperature. (a): spray-dried powders with GA and MD; (b): freeze-dried powders with GA and MD; (c): rose anthocyanin extracts. Standard deviations were evaluated in triplicate with standard error <5%
Table 4. Kinetic parameters of anthocyanin degradation during heat treatment