Estudio del efecto de la microencapsulación sobre la bioaccesibilidad gástrica in vitro de compuestos bioactivos de taxo (Passiflora mollisima), mora (Rubus glaucus Benth) y mortiño (Vaccinium floribundum Kunth)

Abstract

This work study the effect of microencapsulation on gastric bioaccesibility of bioactive compounds in vitro simulation of banana passion fruit (Passiflora mollisima), Andean blackberry (Rubus glaucus Benth) and Andean blueberry (Vaccinium floribundum Kunth). The pulp of each fruit was microencapsulated in a solution mixture with encapsulating material which was made with maltodextrin and maltodextrin-gum arabic. Microencapsulation was performed by spray drying. An in vitro simulation was performed to evaluate the bioaccessibility of the microencapsulates of each fruit. To begin this simulation the parameter of concentration was 0.5 g / 11 mL; speed and centrifugation time were 5 000 rpm and 20 min. The following phases were simulated: initial, buccal, gastric, intestinal and final phases. The amount of total polyphenols and antioxidant capacity were evaluated. The microencapsulation with maltodextrin-gum arabic (MD-GA) presented protection since it allowed a better release in the intestinal and final phase, obtaining: 60 % and 80 % of total polyphenol content for banana passion fruit, Andean blackberry and Andean blueberry, respectively. The antioxidant capacity was 3, 2 and 5 times higher than the control sample banana passion fruit, Andean blackberry and Andean blueberry, respectively. A beverage was prepared with banana passion fruit microencapsuled. An acceptability analysis and a sensorial analysis was carried out to evaluate the organoleptic quality (appearance, flavor, aroma, smell, acidity, astringency and presence of strange flavors). 91% of the respondents expressed their willingness to consume the beverage prepared with microencapsulated. In the cost estimate, the products presented a total production cost of US $ 0.40, US $ 1.21 and US $ 1.62 for 200 mL, 750 mL and 1 L presentations.