Encapsulation and Degradation Kinetics of Bioactive Compounds from Sweet Potato Peel During Storage

Abstract

Research background: The aim of this work was to evaluate utilization of sweet potato peel as a source of bioactive compounds. The effect of solvents (acetone and acetone/ethanol mixture) on extraction efficiency of total carotenods and phenolics from sweet potato flesh tuber and peel, and antioxidant activity were investigated. SPP extract standed out in terms of antioxidant activity and was choosen for encapsulation by spray and freeze drying techniques. Experimental approach: Encapsulation is an effective method to improve phytochemical stability by entrapping the core material with a coating agent. In this study, spray and freeze-drying techniques were applied for improving the stability of bioactive compounds (carotenoids and phenolics) using whey protein as a coating material. The main advantages of applied techniques over the other encapsulation techniques are simplicity, continuity, effectiveness, availability, and applicability. Results and conclusions: Physicochemical characteristics revealed that spray drying resulted in the formation of lower size particles, better flowing properties, and encapsulation efficiency of carotenoids. The retention of encapsulated and non-encapsulated bioactive compounds was monitoring during storage at daylight and dark conditions. Storage conditions affected the carotenoid retention, whereas daylight exhibited the higher degradation rate for all samples. Phenolic compounds exhibited higher retention for all investigated samples. Degradation kinetic parameters suggest the longer shelf life of spray dried encapsulates and potent method for bioactives stabilization. Novelty and scientific contribution: This study demonstrates that the spray drying technique and utilization of sweet potato peel have big potential in functional additives development, with improved nutritional, color and bioactive properties.

Gelatin-Graphene Oxide Nanocomposite Hydrogels for Kluyveromyces lactis Encapsulation: Potential Applications in Probiotics and Bioreactor Packings

“…Encapsulation of bioactive compounds or whole cells for oral administration has been achieved with the aid of several materials, including collagen, gelatin, alginate, chitosan, gum Arabic, maltodextrin, starch, sodium caseinate, polyvinyl alcohol, polyethylene glycol, and polyacrylic acid [15][16][17][18][19]. Polymeric materials, particularly hydrogels, have been described as the preferred choice due to characteristics such as hydrophilic porous matrix, flexibility, high biocompatibility and biodegradability, prolonged consistency, userfriendliness, low cost, and ease of access [20][21][22].…”

Simulated gastrointestinal digestion and storage stability of tomato waste encapsulates

“…The impact of variation of the used encapsulation materials on the oxidation stability during storage of powders were investigated in this study, in order to estimate the potential of different wall materials to produce shelf-stable encapsulates with functional compounds extracted from tomato waste. Previous findings reported that the phenolic compounds remain quite stable during storage of encapsulates (19,40). In contrast, carotenoids are more prone to degradation, precisely to isomerisation, especially at high temperature, in daylight, and oxidation (19).…”

“…Previous findings reported that the phenolic compounds remain quite stable during storage of encapsulates (19,40). In contrast, carotenoids are more prone to degradation, precisely to isomerisation, especially at high temperature, in daylight, and oxidation (19). Under these conditions, isomerization of trans carotenoids, their usual configuration, is promoted to the cis forms, which are much more susceptible to oxidation (41).…”

“…Rate constant (k) and half-life time (t1⁄ 2) were calculated by the method of Cai and Corke (18) using the regression analysis of ln (Retention, %) against storage time when plotted on a natural logarithmic scale (19).…”

Horned Melon (Cucumis metuliferus E. Meyer Ex. Naudin)—Current Knowledge on Its Phytochemicals, Biological Benefits, and Potential Applications

“…Phytochemicals are compounds that occur naturally in plants as secondary metabolites. Many epidemiological studies have reported stating that phytochemicals possess significant antioxidant activities, which is also linked with the prevention and therapy of certain chronic diseases [20]. Horned melon has an array of characteristic secondary metabolites, which are presented in Table 3.…”