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Extraction of water-soluble hemicelluloses from barley husks.

Roos, Alexandra; Persson, Tobias LU ; Krawczyk, Holger LU ; Zacchi, Guido LU and Stålbrand, Henrik LU (2009) In Bioresource Technology 100(2). p.763-769
Abstract
Heat treatment of barley husks was performed to extract arabinoxylan with high yield and high weight-averaged molecular mass (M(W)). Microwave irradiation was employed for initial screening of suitable residence times (2-15min), temperatures (120-210 degrees C) and initial pH (3-13) of the reaction slurry. Microwave irradiation was shown to be a good method for predicting the effects of heat treatment on a larger scale using steam pretreatment. A M(W) of about 40,000Da was achieved without the addition of chemicals, by both microwave irradiation and steam pretreatment, with a yield of about 9%. The yield was significantly increased by slightly increasing the severity factor. However, the M(W) decreased below 20,000Da at severity factors... (More)
Heat treatment of barley husks was performed to extract arabinoxylan with high yield and high weight-averaged molecular mass (M(W)). Microwave irradiation was employed for initial screening of suitable residence times (2-15min), temperatures (120-210 degrees C) and initial pH (3-13) of the reaction slurry. Microwave irradiation was shown to be a good method for predicting the effects of heat treatment on a larger scale using steam pretreatment. A M(W) of about 40,000Da was achieved without the addition of chemicals, by both microwave irradiation and steam pretreatment, with a yield of about 9%. The yield was significantly increased by slightly increasing the severity factor. However, the M(W) decreased below 20,000Da at severity factors above 3.7. Arabinosyl side groups were enzymatically hydrolysed from the arabinoxylan by alpha-l-arabinofuranosidase to a degree of 47%, demonstrating the ability to specifically alter the side group substitution of arabinoxylans with the use of enzymes. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Bioresource Technology
volume
100
issue
2
pages
763 - 769
publisher
Elsevier
external identifiers
  • wos:000261080700039
  • pmid:18762412
  • scopus:53649099196
ISSN
1873-2976
DOI
10.1016/j.biortech.2008.07.022
language
English
LU publication?
yes
id
a35f875d-4abc-4ae2-86e4-aaaebe7d9f0c (old id 1243537)
date added to LUP
2009-03-10 15:18:32
date last changed
2017-11-26 03:29:27
@article{a35f875d-4abc-4ae2-86e4-aaaebe7d9f0c,
  abstract     = {Heat treatment of barley husks was performed to extract arabinoxylan with high yield and high weight-averaged molecular mass (M(W)). Microwave irradiation was employed for initial screening of suitable residence times (2-15min), temperatures (120-210 degrees C) and initial pH (3-13) of the reaction slurry. Microwave irradiation was shown to be a good method for predicting the effects of heat treatment on a larger scale using steam pretreatment. A M(W) of about 40,000Da was achieved without the addition of chemicals, by both microwave irradiation and steam pretreatment, with a yield of about 9%. The yield was significantly increased by slightly increasing the severity factor. However, the M(W) decreased below 20,000Da at severity factors above 3.7. Arabinosyl side groups were enzymatically hydrolysed from the arabinoxylan by alpha-l-arabinofuranosidase to a degree of 47%, demonstrating the ability to specifically alter the side group substitution of arabinoxylans with the use of enzymes.},
  author       = {Roos, Alexandra and Persson, Tobias and Krawczyk, Holger and Zacchi, Guido and Stålbrand, Henrik},
  issn         = {1873-2976},
  language     = {eng},
  number       = {2},
  pages        = {763--769},
  publisher    = {Elsevier},
  series       = {Bioresource Technology},
  title        = {Extraction of water-soluble hemicelluloses from barley husks.},
  url          = {http://dx.doi.org/10.1016/j.biortech.2008.07.022},
  volume       = {100},
  year         = {2009},
}