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Pulsed electric field treatment for solid-liquid extraction of red beetroot pigment

Fincan, Mustafa LU ; DeVito, F and Dejmek, Petr LU (2004) In Journal of Food Engineering 64(3). p.381-388
Abstract
Extractability of red pigment from red beetroot was investigated using pulsed electric field (PEF) treated tissue in a solid-liquid extraction process. Thin disks of the tissue were subjected to PEF at different intensities and, 3-4 min after the treatment, the release of red pigment and ionic species into an isotonic solution was measured in situ using a spectrophotometer and a conductivity meter. The highest degree of extraction achieved with PEF was compared with that of freezing and mechanical pressing. Subjected to 270 rectangular pulses of 10 Vs at 1 kV/cm field strength, with an energy consumption of 7 kJ/kg, the samples released about 90%,) of total red colouring and ionic content following I h aqueous extraction. The increase in... (More)
Extractability of red pigment from red beetroot was investigated using pulsed electric field (PEF) treated tissue in a solid-liquid extraction process. Thin disks of the tissue were subjected to PEF at different intensities and, 3-4 min after the treatment, the release of red pigment and ionic species into an isotonic solution was measured in situ using a spectrophotometer and a conductivity meter. The highest degree of extraction achieved with PEF was compared with that of freezing and mechanical pressing. Subjected to 270 rectangular pulses of 10 Vs at 1 kV/cm field strength, with an energy consumption of 7 kJ/kg, the samples released about 90%,) of total red colouring and ionic content following I h aqueous extraction. The increase in tissue electric conductivity after PEF treatment correlated approximately linearly with the extraction yield of red pigment and ionic species only up to an extraction level of 60-800%. No differential permeabilization of the intracellular components was found. Higher degree of variation of the extractability of pigment and ionic species at intermediate PEF treatments was interpreted as related to non-homogenous permeabilization of the tissue due to cell size. (C) 2003 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Red beetroot, Extraction, Betanin, Pulsed electric field, Permeabilization, Electric conductivity
in
Journal of Food Engineering
volume
64
issue
3
pages
381 - 388
publisher
Elsevier
external identifiers
  • wos:000221274400016
  • scopus:1842581273
ISSN
0260-8774
DOI
10.1016/j.jfoodeng.2003.11.006
language
English
LU publication?
yes
id
abba1411-b1a4-4d76-9909-a97b82742018 (old id 139205)
date added to LUP
2007-07-18 13:47:42
date last changed
2017-08-27 05:27:50
@article{abba1411-b1a4-4d76-9909-a97b82742018,
  abstract     = {Extractability of red pigment from red beetroot was investigated using pulsed electric field (PEF) treated tissue in a solid-liquid extraction process. Thin disks of the tissue were subjected to PEF at different intensities and, 3-4 min after the treatment, the release of red pigment and ionic species into an isotonic solution was measured in situ using a spectrophotometer and a conductivity meter. The highest degree of extraction achieved with PEF was compared with that of freezing and mechanical pressing. Subjected to 270 rectangular pulses of 10 Vs at 1 kV/cm field strength, with an energy consumption of 7 kJ/kg, the samples released about 90%,) of total red colouring and ionic content following I h aqueous extraction. The increase in tissue electric conductivity after PEF treatment correlated approximately linearly with the extraction yield of red pigment and ionic species only up to an extraction level of 60-800%. No differential permeabilization of the intracellular components was found. Higher degree of variation of the extractability of pigment and ionic species at intermediate PEF treatments was interpreted as related to non-homogenous permeabilization of the tissue due to cell size. (C) 2003 Elsevier Ltd. All rights reserved.},
  author       = {Fincan, Mustafa and DeVito, F and Dejmek, Petr},
  issn         = {0260-8774},
  keyword      = {Red beetroot,Extraction,Betanin,Pulsed electric field,Permeabilization,Electric conductivity},
  language     = {eng},
  number       = {3},
  pages        = {381--388},
  publisher    = {Elsevier},
  series       = {Journal of Food Engineering},
  title        = {Pulsed electric field treatment for solid-liquid extraction of red beetroot pigment},
  url          = {http://dx.doi.org/10.1016/j.jfoodeng.2003.11.006},
  volume       = {64},
  year         = {2004},
}