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Title: Xylanase B from the hyperthermophile Thermotoga maritima as an indicator for temperature gradients in high pressure high temperature processing
Authors: Vervoort, Liesbeth
Van der Plancken, Iesel
Grauwet, Tara
Verjans, Priscilla
Courtin, Christophe
Hendrickx, Marc
Van Loey, Ann # ×
Issue Date: Apr-2011
Publisher: Elsevier Science
Series Title: Innovative Food Science & Emerging Technologies vol:12 issue:2 pages:187-196
Abstract: Within the scope of high pressure food sterilization, an important issue that should be taken into account in refining process and equipment design is the time- and position-dependent temperature gradient that exists throughout the pressure vessel and the product load. Since enzymes from thermophilic microorganisms show good prospects for the development of indicators to map out the temperature non-uniformity in high pressure high temperature (HPHT) processing, in this work, the potential of xylanase B from Thermotoga maritima (XTMB) was investigated. Its inactivation at isothermal-isobaric conditions was best described by a first-order model. The pressure dependence of the D values was negligible at HPHT, the temperature dependence however was substantial. The Thermal Death Time (TDT) model, and its corresponding parameters, describing this large temperature dependence were successfully validated under dynamic processing conditions, relevant for industrial HPHT applications.
URI: 
ISSN: 1466-8564
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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