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Optimization of acid hydrolysis conditions for feruloylated oligosaccharides from rice bran through response surface methodolgy.

Authors
  • Li, Ken Yuon
  • Lai, Phoency
  • Lu, Shin
  • Fang, Yi Ting
  • Chen, Hua Han
Type
Published Article
Journal
Journal of Agricultural and Food Chemistry
Publisher
American Chemical Society
Publication Date
Oct 08, 2008
Volume
56
Issue
19
Pages
8975–8978
Identifiers
DOI: 10.1021/jf801736z
PMID: 18781762
Source
Medline
License
Unknown

Abstract

Response surface methodology (RSM) was employed to optimize the hydrolysis conditions with trifluoroacetic acid (TFA) to obtain the maximum amount of feruloylated oligosaccharides from rice bran. The TFA concentration and hydrolysis time effects on feruloylated oligosaccharides recovery are studied. The optimum hydrolysis conditions for maximizing feruloylated oligosaccharides recovery were 193 mM TFA concentration and 1.36 h of hydrolysis time. Under these conditions the corresponding acyl ferulic group quantity was 78.63 microg in 1 mL of hydrolysate. The model was experimentally verified with a satisfactory coefficient of R (2) (= 0.96). The quantity of acyl ferulic group in the feruloylated oligosaccharides, purified using Amberlite XAD-4, was 916.12 microg/g of rice bran under the optimum hydrolysis conditions. The proposed method accounted for 54.08% of the total acyl ferulic group in rice bran. The results suggest that the proposed conditions were useful in maximizing recovery of feruloylated oligosaccharides from rice bran.

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