Journal
JOURNAL OF FOOD ENGINEERING
Volume 82, Issue 1, Pages 84-91Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jfoodeng.2007.01.021
Keywords
amorphous; bioactive; crystallisation; encapsulation; fruit fibre; spray drying
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The introduction of natural fruit fibres as an encapsulating agent has demonstrated encouraging results as a replacement carrier for spray drying sticky materials. The combination of these fruit fibres and bioactives (Hibiscus sabdariffa L.) has created a novel nutraceutical product suitable for a variety of applications in functional food manufacturing. Through characterisation of the product, it appears that the material is appropriate in terms of its moisture content and encapsulation of the bioactive material. It also maintains a free-flowing form under appropriately controlled humidity conditions suitable for manufacturing purposes. The presence of the bioactive material in the fibres does not appear to affect the product size or shape significantly. An unusual moisture change phenomenon was observed during exposure of the spray-dried powder to ambient air. A rapid moisture sorption and gradual slow desorption pattern was seen and is believed to be associated with crystallisation behaviour. (c) 2007 Elsevier Ltd. All rights reserved.
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