Document Detail


Quantification of high-power ultrasound induced damage on potato starch granules using light microscopy.
MedLine Citation:
PMID:  21962479     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A simple light microscopic technique was developed in order to quantify the damage inflicted by high-power low-frequency ultrasound (0-160 W, 20 kHz) treatment on potato starch granules in aqueous dispersions. The surface properties of the starch granules were modified using ethanol and SDS washing methods, which are known to displace proteins and lipids from the surface of the starch granules. The study showed that in the case of normal and ethanol-washed potato starch dispersions, two linear regions were observed. The number of defects first increased linearly with an increase in ultrasound power up to a threshold level. This was then followed by another linear dependence of the number of defects on the ultrasound power. The power threshold where the change-over occurred was higher for the ethanol-washed potato dispersions compared to non-washed potato dispersions. In the case of SDS-washed potato starch, although the increase in defects was linear with the ultrasound power, the power threshold for a second linear region was not observed. These results are discussed in terms of the different possible mechanisms of cavitation induced-damage (hydrodynamic shear stresses and micro-jetting) and by taking into account the hydrophobicity of the starch granule surface.
Authors:
Yue Yue J Zuo; Pascal Hébraud; Yacine Hemar; Muthupandian Ashokkumar
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-09-06
Journal Detail:
Title:  Ultrasonics sonochemistry     Volume:  19     ISSN:  1873-2828     ISO Abbreviation:  Ultrason Sonochem     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-01-03     Completed Date:  2012-04-18     Revised Date:  2012-05-25    
Medline Journal Info:
Nlm Unique ID:  9433356     Medline TA:  Ultrason Sonochem     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  421-6     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
Affiliation:
School of Chemistry, The University of Melbourne, Melbourne, Vic 3010, Australia.
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MeSH Terms
Descriptor/Qualifier:
Dose-Response Relationship, Radiation
High-Energy Shock Waves
Microscopy
Radiation Dosage
Solanum tuberosum / chemistry*,  cytology,  radiation effects*
Sonication / methods*
Starch / radiation effects*,  ultrastructure*
Chemical
Reg. No./Substance:
9005-25-8/Starch
Comments/Corrections
Erratum In:
Ultrason Sonochem. 2012 Sep;19(5):1126

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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