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Influence of dehulling pretreatment on physicochemical properties of Gleditsia sinensis Lam. gum

Jian, Hong-lei; Carrasco, Cristhian LU ; Zhang, Wei-ming and Jiang, Jian-xin (2011) In Food Hydrocolloids 25(5). p.1337-1343
Abstract
The seeds of Gleditsia sinensis Lam., widespread in China, are an important source of galactomannans. G. sinensis gum was extracted from whole seeds using baking, boiling water and acid dehulling pretreatment, respectively. The physicochemical properties of the three isolated G. sinensis gums were studied to evaluate three pretreatment methods. The results illustrated that the properties of G. sinensis gum were significantly influenced by dulling method (p < 0.05) including the yield, M/G ratio, viscosity, chemical composition and molecular weight. Power-law model (sigma = k.gamma(n)) was applied to the rheological measurements, which indicated that solutions of Gb, Gw and Ga gum behaved as pseudoplastic fluids at the concentration of... (More)
The seeds of Gleditsia sinensis Lam., widespread in China, are an important source of galactomannans. G. sinensis gum was extracted from whole seeds using baking, boiling water and acid dehulling pretreatment, respectively. The physicochemical properties of the three isolated G. sinensis gums were studied to evaluate three pretreatment methods. The results illustrated that the properties of G. sinensis gum were significantly influenced by dulling method (p < 0.05) including the yield, M/G ratio, viscosity, chemical composition and molecular weight. Power-law model (sigma = k.gamma(n)) was applied to the rheological measurements, which indicated that solutions of Gb, Gw and Ga gum behaved as pseudoplastic fluids at the concentration of 0.5% (w/v). The gum obtained by acid pretreatment (Ga) had the lowest yield of 20-24% (w/w). However Ga showed a pronounced shear-thinning behavior and particularly higher viscosity compared with the gums extracted by baking pretreatment (Gb) and boiling water dehulling method (Gw). The mannose to galactose ratios (M/G ratio) for Gb, Gw and Ga were found to be 4.5, 4.4 and 6.9, respectively. The highest molecular weight of 3.31 x 10(6) Da was observed for the galactomannans of Gb. (C) 2010 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Gleditsia sinensis Lam. gum, Galactomannan, Dehulling pretreatment, Sugar composition, Rheological property
in
Food Hydrocolloids
volume
25
issue
5
pages
1337 - 1343
publisher
Elsevier
external identifiers
  • wos:000288247300062
  • scopus:79952534581
ISSN
0268-005X
DOI
10.1016/j.foodhyd.2010.12.009
language
English
LU publication?
yes
id
604ef821-c50b-43fc-81bb-5fc27782b700 (old id 1936218)
date added to LUP
2011-05-10 09:23:50
date last changed
2017-10-01 03:08:34
@article{604ef821-c50b-43fc-81bb-5fc27782b700,
  abstract     = {The seeds of Gleditsia sinensis Lam., widespread in China, are an important source of galactomannans. G. sinensis gum was extracted from whole seeds using baking, boiling water and acid dehulling pretreatment, respectively. The physicochemical properties of the three isolated G. sinensis gums were studied to evaluate three pretreatment methods. The results illustrated that the properties of G. sinensis gum were significantly influenced by dulling method (p &lt; 0.05) including the yield, M/G ratio, viscosity, chemical composition and molecular weight. Power-law model (sigma = k.gamma(n)) was applied to the rheological measurements, which indicated that solutions of Gb, Gw and Ga gum behaved as pseudoplastic fluids at the concentration of 0.5% (w/v). The gum obtained by acid pretreatment (Ga) had the lowest yield of 20-24% (w/w). However Ga showed a pronounced shear-thinning behavior and particularly higher viscosity compared with the gums extracted by baking pretreatment (Gb) and boiling water dehulling method (Gw). The mannose to galactose ratios (M/G ratio) for Gb, Gw and Ga were found to be 4.5, 4.4 and 6.9, respectively. The highest molecular weight of 3.31 x 10(6) Da was observed for the galactomannans of Gb. (C) 2010 Elsevier Ltd. All rights reserved.},
  author       = {Jian, Hong-lei and Carrasco, Cristhian and Zhang, Wei-ming and Jiang, Jian-xin},
  issn         = {0268-005X},
  keyword      = {Gleditsia sinensis Lam. gum,Galactomannan,Dehulling pretreatment,Sugar composition,Rheological property},
  language     = {eng},
  number       = {5},
  pages        = {1337--1343},
  publisher    = {Elsevier},
  series       = {Food Hydrocolloids},
  title        = {Influence of dehulling pretreatment on physicochemical properties of Gleditsia sinensis Lam. gum},
  url          = {http://dx.doi.org/10.1016/j.foodhyd.2010.12.009},
  volume       = {25},
  year         = {2011},
}