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|Title: ||Evaluation of spray drying conditions on properties of microencapsulated oregano essential oil|
|???metadata.dc.creator???: ||Botrel, D. A.|
Borges, Soraia Vilela
Fernandes, R. V. de B.
Viana, A. D.
Costa, J. M. G. da
Marques, G. R.
|Keywords: ||Essential oils|
Response surface methodology
|Publisher: ||Institute of Food Science and Technology|
|Issue Date: ||24-Apr-2012|
|Citation: ||BOTREL, D. A. et al. Evaluation of spray drying conditions on properties of microencapsulated oregano essential oil. International Journal of Food Science & Technology, Oxford, v. 47, n. 11, p. 2289-2296, Nov. 2012.|
|Abstract: ||Response surface methodology (RSM) was employed to investigate variations in powder characteristics with
respect to spray drying operating parameters including both feed rates (L min )1 ) and inlet temperatures (°C).
Inlet temperatures around 180 °C provided the lowest values for moisture. Powder recovery was significantly
affected (P < 0.10) by inlet air temperature and feed rate, where a raise in inlet temperature and feed rate
resulted in higher powder recovery. No significant difference (P > 0.05) was observed for water activity,
solubility and hygroscopicity between treatments. Regarding oil retention, the results showed a significant
(P < 0.05) interaction between the two studied factors. A tendency for higher values of oil retention was
observed when using combinations of high inlet temperatures ⁄ low feed rates and low inlet temperatures ⁄ high
feed rates. Particle size distribution averaged 2.0, 8.1 and 18.3 lm for D 10 , D 50 and D 90 , respectively. The
morphology of particles showed no cracks in most capsules. The results indicate that high temperature
(185 °C) and moderated feed rate (0.63 L min )1 ) are the best spray drying conditions.|
|Appears in Collections:||DCA - Artigos publicados em periódicos|
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