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Heat extraction of corn fiber hemicellulose

Benko, Zsuzsa; Andersson, Alexandra LU ; Szengyel, Zsolt; Gaspar, Melinda; Reczey, Kati and Stålbrand, Henrik LU (2007) In Applied Biochemistry and Biotechnology 137. p.253-265
Abstract
Water-soluble hemicellulose was extracted from corn fiber with microwave-assisted heat treatment. The effects of treatment temperature and initial pH of the aqueous extraction media were investigated regarding hemicellulose recovery and molecular mass of the isolated polysaccharides. In treatments carried out at neutral pH (simple water extraction), it has been demonstrated that hemicellulose recovery could be increased by applying higher treatment temperatures. However, the molecular weight of isolated hemicellulose gets significantly lower. For example, 10% of the raw materials' xylan was extracted at 160 degrees C and about 30% recovery was reached at 210 degrees C. However, the molecular mass of the isolated polysaccharide at 210... (More)
Water-soluble hemicellulose was extracted from corn fiber with microwave-assisted heat treatment. The effects of treatment temperature and initial pH of the aqueous extraction media were investigated regarding hemicellulose recovery and molecular mass of the isolated polysaccharides. In treatments carried out at neutral pH (simple water extraction), it has been demonstrated that hemicellulose recovery could be increased by applying higher treatment temperatures. However, the molecular weight of isolated hemicellulose gets significantly lower. For example, 10% of the raw materials' xylan was extracted at 160 degrees C and about 30% recovery was reached at 210 degrees C. However, the molecular mass of the isolated polysaccharide at 210 degrees C (5.82 x 10(4)) was about half of that measured at 160 degrees C (1.37 x 10(5)). Reducing the pH with sulfuric acid resulted in shorter polymer chains (1.7 x 10(4)) and lower hemicellulose yields (2.2%). Application of sodium hydroxide in the treatment showed that, compared with acid, considerably higher yields (11%) with longer polysaccharide chains (1.3 x 10(5)) could be obtained. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
size exclusion chromatography, fractionation, microwave-assisted, alkaline extraction, carbohydrate analysis, weight-average molecular, weight, maize
in
Applied Biochemistry and Biotechnology
volume
137
pages
253 - 265
publisher
Humana Press
external identifiers
  • wos:000246616900024
  • scopus:34347220939
ISSN
1559-0291
DOI
10.1007/s12010-007-9056-0
language
English
LU publication?
yes
id
04359a91-c858-4629-935a-e27ca110c107 (old id 657960)
date added to LUP
2007-12-05 13:32:58
date last changed
2017-09-24 03:27:42
@article{04359a91-c858-4629-935a-e27ca110c107,
  abstract     = {Water-soluble hemicellulose was extracted from corn fiber with microwave-assisted heat treatment. The effects of treatment temperature and initial pH of the aqueous extraction media were investigated regarding hemicellulose recovery and molecular mass of the isolated polysaccharides. In treatments carried out at neutral pH (simple water extraction), it has been demonstrated that hemicellulose recovery could be increased by applying higher treatment temperatures. However, the molecular weight of isolated hemicellulose gets significantly lower. For example, 10% of the raw materials' xylan was extracted at 160 degrees C and about 30% recovery was reached at 210 degrees C. However, the molecular mass of the isolated polysaccharide at 210 degrees C (5.82 x 10(4)) was about half of that measured at 160 degrees C (1.37 x 10(5)). Reducing the pH with sulfuric acid resulted in shorter polymer chains (1.7 x 10(4)) and lower hemicellulose yields (2.2%). Application of sodium hydroxide in the treatment showed that, compared with acid, considerably higher yields (11%) with longer polysaccharide chains (1.3 x 10(5)) could be obtained.},
  author       = {Benko, Zsuzsa and Andersson, Alexandra and Szengyel, Zsolt and Gaspar, Melinda and Reczey, Kati and Stålbrand, Henrik},
  issn         = {1559-0291},
  keyword      = {size exclusion chromatography,fractionation,microwave-assisted,alkaline extraction,carbohydrate analysis,weight-average molecular,weight,maize},
  language     = {eng},
  pages        = {253--265},
  publisher    = {Humana Press},
  series       = {Applied Biochemistry and Biotechnology},
  title        = {Heat extraction of corn fiber hemicellulose},
  url          = {http://dx.doi.org/10.1007/s12010-007-9056-0},
  volume       = {137},
  year         = {2007},
}