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Title: Mild-heat and high-pressure inactivation of carrot pectin methylesterase: A kinetic study
Authors: Ly-Nguyen, B ×
Van Loey, Ann
Smout, Chantal
Ozcan, SE
Fachin, D
Verlent, Isabel
Truong, SV
Duvetter, Thomas
Hendrickx, Marc #
Issue Date: 2003
Publisher: Inst food technologists
Series Title: Journal of food science vol:68 issue:4 pages:1377-1383
Abstract: Pectin methylesterase (PME) was extracted from carrots and purified by affinity chromatography. The thermal high-pressure inactivation of the PME was investigated in a model system. Under these conditions, the (thermo) stable fraction is not inactivated and the isobaric-isothermal inactivation followed a fractional-conversion model. At lower pressures (< 300 MPa) and higher temperatures (> 50 degreesC), an antagonistic effect of pressure and heat was observed. A 2nd- and 3rd-degree polynomial model (derived from available thermodynamic model) was successfully used to describe the heat pressure dependence of the inactivation rate constants. From the purified carrot PME sample, the thermostable PME fraction was isolated. The thermal inactivation of this fraction followed first-order kinetics.
URI: 
ISSN: 0022-1147
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Food and Microbial Technology
× corresponding author
# (joint) last author

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