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Rheological characteristics of different tropical root starches

Moorthy, Subramony N. ; Eliasson, Ann-Charlotte LU and Larsson, Helena LU (2008) In Stärke 60(5). p.233-247
Abstract
The rheological properties of starch extracted from ten different species of tropical tuber crops were examined using a Bohlin rheometer. Suspensions with starch

concentrations of 3, 4 and 5% were gelatinised at 757C and fed into the rheometer cup. A C 25 measuring system was used and the heating rate was 1.57C/min,

heating schedule 75-957C, holding at 957C for 600 s, cooling to 357C at 1.57C/min, holding for 3600 s. For strain sweep tests, the range of strain used was 0-0.2% and

the temperature of test was 357C. The data on viscosity, storage modulus (G0) and phase angle were obtained from the rheograms. The results indicated variability in

the various properties of the different starches. However the... (More)
The rheological properties of starch extracted from ten different species of tropical tuber crops were examined using a Bohlin rheometer. Suspensions with starch

concentrations of 3, 4 and 5% were gelatinised at 757C and fed into the rheometer cup. A C 25 measuring system was used and the heating rate was 1.57C/min,

heating schedule 75-957C, holding at 957C for 600 s, cooling to 357C at 1.57C/min, holding for 3600 s. For strain sweep tests, the range of strain used was 0-0.2% and

the temperature of test was 357C. The data on viscosity, storage modulus (G0) and phase angle were obtained from the rheograms. The results indicated variability in

the various properties of the different starches. However the results did not follow a

definite trend. The viscosity of Colocasia starch was low while Canna edulis and

yam starches had high viscosities. The storage modulus was also highest for Canna

starch (70-93 Pa) for 5% and gel strength was comparatively high for Canna edulis,

Dioscorea esculenta and D. rotundata starches. The phase angle values followed

the pattern of G0 and all the starch pastes were found to be elastic in nature at

higher concentration. The wide variability in rheological properties can be useful in

different applications of tuber starches. (Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Tuber starches, Rheology, Storage modulus, Loss modulus, Phase angle, Viscosity
in
Stärke
volume
60
issue
5
pages
233 - 247
publisher
John Wiley & Sons Inc.
external identifiers
  • wos:000256209100002
  • scopus:44349183305
ISSN
0038-9056
DOI
10.1002/star.200700708
language
English
LU publication?
yes
id
989bdc78-932a-4a1e-87da-089ea5e1b96c (old id 1153008)
date added to LUP
2016-04-01 12:35:17
date last changed
2023-09-02 13:05:51
@article{989bdc78-932a-4a1e-87da-089ea5e1b96c,
  abstract     = {{The rheological properties of starch extracted from ten different species of tropical tuber crops were examined using a Bohlin rheometer. Suspensions with starch<br/><br>
concentrations of 3, 4 and 5% were gelatinised at 757C and fed into the rheometer cup. A C 25 measuring system was used and the heating rate was 1.57C/min,<br/><br>
heating schedule 75-957C, holding at 957C for 600 s, cooling to 357C at 1.57C/min, holding for 3600 s. For strain sweep tests, the range of strain used was 0-0.2% and<br/><br>
the temperature of test was 357C. The data on viscosity, storage modulus (G0) and phase angle were obtained from the rheograms. The results indicated variability in<br/><br>
the various properties of the different starches. However the results did not follow a<br/><br>
definite trend. The viscosity of Colocasia starch was low while Canna edulis and<br/><br>
yam starches had high viscosities. The storage modulus was also highest for Canna<br/><br>
starch (70-93 Pa) for 5% and gel strength was comparatively high for Canna edulis,<br/><br>
Dioscorea esculenta and D. rotundata starches. The phase angle values followed<br/><br>
the pattern of G0 and all the starch pastes were found to be elastic in nature at<br/><br>
higher concentration. The wide variability in rheological properties can be useful in<br/><br>
different applications of tuber starches.}},
  author       = {{Moorthy, Subramony N. and Eliasson, Ann-Charlotte and Larsson, Helena}},
  issn         = {{0038-9056}},
  keywords     = {{Tuber starches; Rheology; Storage modulus; Loss modulus; Phase angle; Viscosity}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{233--247}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Stärke}},
  title        = {{Rheological characteristics of different tropical root starches}},
  url          = {{http://dx.doi.org/10.1002/star.200700708}},
  doi          = {{10.1002/star.200700708}},
  volume       = {{60}},
  year         = {{2008}},
}