Alginate capsules are promising delivery systems for encapsulation and release of phenolics since they can be fabricated from food‐grade biopolymers using mild processes. On the other hand, knowing the release kinetic of the phenolic in the capsules is critical for capsule fabrication and product quality improvement This study is aimed at mathematically modeling the transfer of encapsulated sage ( Salvia fruticosa Miller) phenolics in alginate particles to water and to determine some physicochemical properties of capsules containing different concentrations of phenolics. The water activity values (aw) of the capsule varied between 0.9976 and 0.9990. Sphericity factors of 1 (37.5 ppm), 2 (75 ppm), 3 (150 ppm), 4 (300 ppm), and control (0 ppm) samples were determined as 0.042, 0.044, 0.043, 0.273, and 0.039, respectively. The yellowness (+b ∗ ) value of the samples increased significantly as the added sage extract concentration increased. While the phenolic content of the samples was determined between 0.174 and 1.1831 mg/kg GAE, the antioxidant activity values were determined between 0.9602 and 6.6930. To understand the mechanism of phenolic release from the capsules, six different mathematical models were used ( First Order , Higuchi , Korsmeyer-Peppas , Hixson and Crowell , The Peppas-Sahlin , and Gompertz ). The highest R 2 (0.9952‐0.9979) and the lowest RMSE (1.0171‐1.7032) values were calculated in The Peppas‐Sahlin among the six models. The Peppas‐Sahlin model kinetic parameters indicated the dominance of Fickian diffusion and the minor effect of relaxation process in the mechanism of phenolic release.
Summary The aim of this study was to produce a functional emulsion product enriched with anchovy ( Engraulis encrasicholus ) oil. Tomato and garlic extracts were added to perform oxidative stability. Tomato and garlic extracts were added to avoid oxidative degradation in such a product. The plant extracts delayed the formation of primary and secondary oxidation products. The value of conjugated diens (3.07 ± 0.15) was markedly low in the emulsions containing garlic extract at the end of the storage period. The p–Av values of the emulsions treated with the extracts were significantly ( P < 0.01) lower than untreated samples. TBARS formation increased slightly, therewithal statistical difference was not observed in the samples treated with garlic extract during the storage. Strong odour and flavour of the garlic suppressed the odour of fish oil. The panellists preferred the flavour, odour and aroma characteristics of the samples treated with the extracts.
MFI was extracted from cuttlefish (Sepia officinalis) and used as a colorant, flavoring, and bioactive compound in caviar-like hydrogel beads. The production parameters, including alginate, salt (NaCl), MFI concentration, and pH, were optimized using response surface methodology. The physicochemical properties of beads produced at optimum conditions (NaCl: 2%, alginate: 1.25%, pH: 8.12, and MFI: 1.39%) were compared with commercial lumpfish (Cyclopterus lumpus) caviar. The analyses showed no significant difference between caviar-like beads and commercial lumpfish caviar. These results suggest that caviar-like beads produced under optimum conditions can be commercialized at low cost to provide an opportunity for sustainable aquaculture.