| Full text | |
| Author(s): |
Santana, Audirene A.
;
de Oliveira, Rafael A.
;
Kurozawa, Louise E.
[1]
;
Park, Kil J.
Total Authors: 4
|
| Affiliation: | [1] Dept Ciencia & Tecnol Alimentos, Londrina, PR - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Engenharia Agrícola; v. 34, n. 5, p. 980-991, SEP-OCT 2014. |
| Web of Science Citations: | 6 |
| Abstract | |
The aim of this study was to evaluate the microencapsulation of pequi pulp by spray drying. A central composite rotational design was used in order to evaluate the effect of the independent variables: inlet air temperature, surfactant concentration and modified starch concentration. The dependent variables were assumed as yield of the process and the product features microencapsulated. A selection of the best process condition was performed to obtain the best condition of a product with the highest vitamin C and carotenoids content. Powders showed moisture content below 2%. The experimental values of hygroscopicity, yield, water activity, total carotenoids and vitamin C powders ranged from 7.96 to 10.67 g of adsorbed water/100g of solids, 24.34 to 49.80%, 0.13 to 0.30, 145.78 to 292.11 mg of ascorbic acid/g of pequi solids and 15.51 to 123.42 mg of carotenoids/g of pequi solids, respectively. The inlet air temperature 140°C, the surfactant concentration of 2.5% and the modified starch concentration of 22.5% was recommended as the selected condition. By the scanning electron microscopy, it was observed that most of the particles had spherical shape and smooth surface. (AU) | |