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Three under-utilised sources of starch from the Andena region in Ecuador. Part II. Rheological characterisation.

Santacruz, S; Ruales, J and Eliasson, Ann-Charlotte LU (2003) In Carbohydrate Polymers 51(1). p.85-92
Abstract
The dynamic rheological behaviour of Arracacha xanthorriza white carrot), Canna edulis (achira) and Oxalis tuberosa oca) starch gels were studied in strain-sweep mode. The starch was diluted with water to cover particle volume fractions of 1–3. The starch suspensions were heated at 89 8C for 30 min, and their swelling power and amylose leaching were measured. C. edulis showed the highest swelling power and particle rigidity (the elastic modulus, G0, of a starch gel at a particle volume fraction of 1 is defined as rigidity), forming stronger gels than O. tuberosa and A. xanthorriza. Storage of the three starch gels at 4 8C showed that A. xanthorriza formed gels which were stable in G0 and phase angle for three days of storage. C. edulis and... (More)
The dynamic rheological behaviour of Arracacha xanthorriza white carrot), Canna edulis (achira) and Oxalis tuberosa oca) starch gels were studied in strain-sweep mode. The starch was diluted with water to cover particle volume fractions of 1–3. The starch suspensions were heated at 89 8C for 30 min, and their swelling power and amylose leaching were measured. C. edulis showed the highest swelling power and particle rigidity (the elastic modulus, G0, of a starch gel at a particle volume fraction of 1 is defined as rigidity), forming stronger gels than O. tuberosa and A. xanthorriza. Storage of the three starch gels at 4 8C showed that A. xanthorriza formed gels which were stable in G0 and phase angle for three days of storage. C. edulis and O. tuberosa gels kept at the same refrigeration conditions showed a high increase in G0 during the first day of storage. A decrease in pH from 6.5 to 4.0 produced a loss of structure in the three starch gels, as was showed by the reduction of G0. Storage at freezing temperature (220 8C) produced higher changes in G0 than refrigeration conditions. There was a rapid formation of an elastic structure in C. edulis and O. tuberosa starch gels on the first day of storage in both refrigeration and freezing conditions. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Retrogradation, Oxalis tuberosa, Arracacha xanthorriza, Canna edulis, Freezing storage, Refrigeration storage
in
Carbohydrate Polymers
volume
51
issue
1
pages
85 - 92
publisher
Elsevier
external identifiers
  • wos:000178637800012
  • scopus:0037209468
ISSN
0144-8617
DOI
10.1016/S0144-8617(02)00140-6
language
English
LU publication?
yes
id
c7b0af77-edf3-4836-b146-e211ad281647 (old id 128320)
date added to LUP
2007-07-19 10:35:16
date last changed
2018-10-03 11:26:02
@article{c7b0af77-edf3-4836-b146-e211ad281647,
  abstract     = {The dynamic rheological behaviour of Arracacha xanthorriza white carrot), Canna edulis (achira) and Oxalis tuberosa oca) starch gels were studied in strain-sweep mode. The starch was diluted with water to cover particle volume fractions of 1–3. The starch suspensions were heated at 89 8C for 30 min, and their swelling power and amylose leaching were measured. C. edulis showed the highest swelling power and particle rigidity (the elastic modulus, G0, of a starch gel at a particle volume fraction of 1 is defined as rigidity), forming stronger gels than O. tuberosa and A. xanthorriza. Storage of the three starch gels at 4 8C showed that A. xanthorriza formed gels which were stable in G0 and phase angle for three days of storage. C. edulis and O. tuberosa gels kept at the same refrigeration conditions showed a high increase in G0 during the first day of storage. A decrease in pH from 6.5 to 4.0 produced a loss of structure in the three starch gels, as was showed by the reduction of G0. Storage at freezing temperature (220 8C) produced higher changes in G0 than refrigeration conditions. There was a rapid formation of an elastic structure in C. edulis and O. tuberosa starch gels on the first day of storage in both refrigeration and freezing conditions.},
  author       = {Santacruz, S and Ruales, J and Eliasson, Ann-Charlotte},
  issn         = {0144-8617},
  keyword      = {Retrogradation,Oxalis tuberosa,Arracacha xanthorriza,Canna edulis,Freezing storage,Refrigeration storage},
  language     = {eng},
  number       = {1},
  pages        = {85--92},
  publisher    = {Elsevier},
  series       = {Carbohydrate Polymers},
  title        = {Three under-utilised sources of starch from the Andena region in Ecuador. Part II. Rheological characterisation.},
  url          = {http://dx.doi.org/10.1016/S0144-8617(02)00140-6},
  volume       = {51},
  year         = {2003},
}