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The effect of heat processing on the functional properties of pectin contained in olive mill wastewater

Galanakis, Charis M.; Tornberg, Eva LU and Gekas, Vassilis (2010) In LWT- Food Science and Technology 43(7). p.1001-1008
Abstract
The purpose of this study was to evaluate the effect of prolonged heat processing (180 min at 50-80 degrees C) on the functional and theological properties of pectin, derived from olive mill wastewater (OMW). It was shown that a low temperature blanching of OMW at 60 degrees C, activates endogenous pectin methyl esterase and promotes demethylation, despite the high concentration of phenols. Activation of the enzyme resulted in enhanced solubilization and subsequent partial degradation of pectin. The induced degradation impaired pectin grade and resulted in loss of gelling functionality. An alternative heating process at 80 degrees C resulted in negligible enzyme induced degradation of the pectin and improved gelling properties of the... (More)
The purpose of this study was to evaluate the effect of prolonged heat processing (180 min at 50-80 degrees C) on the functional and theological properties of pectin, derived from olive mill wastewater (OMW). It was shown that a low temperature blanching of OMW at 60 degrees C, activates endogenous pectin methyl esterase and promotes demethylation, despite the high concentration of phenols. Activation of the enzyme resulted in enhanced solubilization and subsequent partial degradation of pectin. The induced degradation impaired pectin grade and resulted in loss of gelling functionality. An alternative heating process at 80 degrees C resulted in negligible enzyme induced degradation of the pectin and improved gelling properties of the recovered material, despite the lower solubilization of the pectin. The obtained results contribute to a better understanding of the temperature effect on pectin functional properties and can be utilized in order to optimize pectin recovery from OMW. (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
Gelling properties, solubilization, Pectin, Pectin methyl esterase, Olive mill wastewater, Heat processing
in
LWT- Food Science and Technology
volume
43
issue
7
pages
1001 - 1008
publisher
Elsevier
external identifiers
  • wos:000278202300001
  • scopus:77955386030
ISSN
0023-6438
DOI
10.1016/j.lwt.2010.01.004
language
English
LU publication?
yes
id
601eb4af-0ca9-4119-8a53-5549bd736ae4 (old id 1631819)
date added to LUP
2010-07-21 11:30:54
date last changed
2018-05-29 09:39:09
@article{601eb4af-0ca9-4119-8a53-5549bd736ae4,
  abstract     = {The purpose of this study was to evaluate the effect of prolonged heat processing (180 min at 50-80 degrees C) on the functional and theological properties of pectin, derived from olive mill wastewater (OMW). It was shown that a low temperature blanching of OMW at 60 degrees C, activates endogenous pectin methyl esterase and promotes demethylation, despite the high concentration of phenols. Activation of the enzyme resulted in enhanced solubilization and subsequent partial degradation of pectin. The induced degradation impaired pectin grade and resulted in loss of gelling functionality. An alternative heating process at 80 degrees C resulted in negligible enzyme induced degradation of the pectin and improved gelling properties of the recovered material, despite the lower solubilization of the pectin. The obtained results contribute to a better understanding of the temperature effect on pectin functional properties and can be utilized in order to optimize pectin recovery from OMW. (C) 2010 Elsevier Ltd. All rights reserved.},
  author       = {Galanakis, Charis M. and Tornberg, Eva and Gekas, Vassilis},
  issn         = {0023-6438},
  keyword      = {Gelling properties,solubilization,Pectin,Pectin methyl esterase,Olive mill wastewater,Heat processing},
  language     = {eng},
  number       = {7},
  pages        = {1001--1008},
  publisher    = {Elsevier},
  series       = {LWT- Food Science and Technology},
  title        = {The effect of heat processing on the functional properties of pectin contained in olive mill wastewater},
  url          = {http://dx.doi.org/10.1016/j.lwt.2010.01.004},
  volume       = {43},
  year         = {2010},
}