학술논문
Spray Drying of Goat Milk Protein Hydrolysates with Angiotensin Converting Enzyme Inhibitory Activity.
Document Type
Article
Source
Subject
*GOAT milk
*MILK proteins
*ANGIOTENSIN converting enzyme
*ATMOSPHERIC temperature
*MOLECULAR weights
*RESPONSE surfaces (Statistics)
*DATA analysis
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Language
ISSN
1935-5130
Abstract
A goat milk hydrolysate was stabilized by spray drying using different inlet air temperatures (170-230 °C) and feed flow rates (4-12 mL/min) following a central composite experimental design. In order to evaluate the effect of operational conditions on process yield, powder properties (density, moisture, hygroscopicity, and solubility) as well as angiotensin converting enzyme (ACE) inhibitory activity, experimental data were analyzed by response surface methodology. Input variables showed a significant influence on yield, density, and moisture, while hygroscopicity, solubility, and ACE inhibitory activity were not affected. The dried hydrolysate presented an average IC value of 273.13 μg/mL, which involved a loss of 25 % in ACE inhibitory activity with respect to the feed. The variations detected in the low molecular weight fractions of the dried hydrolysates could be responsible for the variations in ACE inhibitory activity. [ABSTRACT FROM AUTHOR]