Abstract
This study aimed microencapsulating Attalea phalerata Mart. oil, containing high carotenoid and phenolic compounds content, with Arabic gum and gelatin, using the complex coacervation method. The yield, efficiency, morphology of microcapsules and content of phenolic compounds, carotenoids and antioxidant activity in different processes conditions (concentration of the filling, temperature and agitation speed) were evaluated. The results showed 88% of yield, efficiency up to 70% and a characteristic size of microcapsules. The amount of carotenoids was high in crude oil (394.84 µg of carotenoids/g oil) and the microencapsulation tests showed amounts of 19.19 to 166.40 µg of carotenoids/g oil. The phenolic compounds in the crude oil were 20.73 mg GAE/g sample and the microencapsulation tests showed amounts of 3.17 to 15.16 mg GAE/g oil. The values of bioactive compounds influenced in the antioxidant activity though ABTS•+ method with values of 161.70 µM trolox/g oil to crude oil and 7.70 and 159.54 µM trolox/g oil for microcapsules tests.
Highlights
Microencapsulation acts as an intelligent approach with a strong therapeutic impact, including its specific and attractive characteristics such as, biocompatibility, stability, target specificity, uniform encapsulation and controlled release (Bale et al, 2016)
The oil of Attalea phalerata Mart. (Arecaceae), widely known as bacuri, is a palm tree commonly found in Brazil
It has a high nutritional value with antiinflammatory properties and there are only a few studies related to its bioactive compounds (Freitas de Lima et al, 2016; De Lima et al, 2017; De Lima et al, 2018)
Summary
Microencapsulation acts as an intelligent approach with a strong therapeutic impact, including its specific and attractive characteristics such as, biocompatibility, stability, target specificity, uniform encapsulation and controlled release (Bale et al, 2016). It allows coating the particles or droplets of liquid material forming microcapsules, which protect their content from direct exposure to light, heat and water through encapsulating agents (Cocato et al, 2007; Ferreira et al, 2009). Among the most relevant compounds, there are the phenolic compounds and carotenoids These constituents and their advantageous health effects arouse the interest of the
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