## 3 Results
### Total Polyphenols, Anthocyanins Content and Antioxidant Activity  
The total polyphenol content (TPC), anthocyanins (TAC), and the antioxidant activity of microcapsules are presented in Table 2. Microcapsules with a PE core were characterized by a higher content of TPC and TAC compared to microcapsules with a CE core, which was also reflected in the content of these two groups of compounds in the extracts themselves. The PE was obtained via solid phase extraction (SPE), which allows for the removal of ballast substances, such as proteins or fats, from the matrix. This method allows for an increase in the concentration of phenolic compounds in the mass of the obtained powders, which translates into an increase in their possible bioactive properties at a low dose of the preparation [16]. Analyzing the type of carrier material, both for microcapsules with CE and PE, the best carrier binding TPC and TAC was the mixture of Alg + Pect + WPI. In turn, the remaining carriers in this respect can be ranked in the following order Alg + Pect > Alg + WPI > Alg. For microcapsules Alg + Pect + WPI with CE and PE core, the content of TPC and TAC was shown to be higher by 1.6 (TPC) and 1.9 (TAC) times and 1.7 (TPC) and 2.0 (TAC) times, respectively, compared to microcapsules with Alg alone. The demonstrated relationships were also reflected in the antioxidant activity assessed using the ABTS, DPPH and FRAP methods, where also using these three methods, the highest activity was shown for microcapsules with a PE core and the Alg + Pect + WPI carrier mixture. This is also confirmed by the correlation analysis, where a significant relationship (_p_ < 0.05) was shown between the TPC and TAC content and the antioxidant activity (_r_ < 0.889). A high relationship was also found between the distinguished parameters and the encapsulation efficiency (_r_ < 0.998), which indicates that the mechanisms described in point 3.1 also affected the content of these two groups of compounds, as well as the antioxidant activity of the obtained microcapsules. The same effect was observed by [PERSON] et al. [11], who found that the antioxidant activity of chokeberry juice and extract microcencapsulated with Alg with the addition of Pect, chitosan, and carrageenanan was largely influenced by polyphenolic compounds, mainly anthocyanins, and the obtained results also correlated with the extraction efficiency. The cited manuscript also showed that the enrichment of Alg with polysaccharides significantly increased the antioxidant activity and polyphenol content in microcapsules, which was also proven in our studies. Moreover, [PERSON] et al. [8] found that the antioxidant activity of microcapsules with a chokeberry extract core was more significantly influenced by the type of carrier used (Alg; Alg + Pect), showing higher values for the time of 30 than 90 min. Overall, the enrichment of the wall material with Pect and WPI allowed for the enhanced retention of TPC, TAC and antioxidant activity of the core materials via better binding of phenolic compounds to the carriers and a reduction in the effective diffusivity by the complex microstructure of the hydrogels. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**No.