High pressure inactivation kinetics of a Thermomyces lanuginosus xylanase evaluated as a process indicator
Φόρτωση...
Ημερομηνία
Συγγραφείς
Gogou, E.
Katapodis, P.
Taoukis, P. S.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Journal of Food Science
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The potential use of Thermomyces lanuginosus xylanase to develop a pressure-temperature-time integrator (PTTI) for high pressure processing was investigated. The combined effect of pressure and temperature on the inactivation of xylanase was studied in the pressure range of 100 to 600 MPa and temperature range of 50 to 70 degrees C. A synergistic effect of pressure and temperature was observed. Xylanase inactivation at the studied processing conditions followed first-order kinetics and was found to be very sensitive to changes in pressure and temperature. The values of activation energy and activation volume were estimated as 92.8 kJ/mol and -23.3 mL/mol at a reference pressure of 450 MPa and a reference temperature of 60 degrees C, respectively. A mathematical model of xylanase inactivation, having as variables time, pressure, and temperature allows the calculation of remaining enzyme activity at any combination of processing conditions within the studied domain. Practical Application: To ensure the optimization and control of high pressure processing, evaluation of the process impact on both safety and quality attributes of foods is essential. Enzymes can serve as effective tools in evaluating the impact of high pressure processes of foods.
Περιγραφή
Λέξεις-κλειδιά
Ascomycota/*enzymology/metabolism, Beverages/microbiology, Computer Simulation, Disinfection/*methods, Endo-1,4-beta Xylanases/biosynthesis/*metabolism, Food Handling, Food Microbiology, *Food Preservation, Food Technology/*methods, Fungal Proteins/bios
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
http://www.ncbi.nlm.nih.gov/pubmed/20722923
http://onlinelibrary.wiley.com/store/10.1111/j.1750-3841.2010.01690.x/asset/j.1750-3841.2010.01690.x.pdf?v=1&t=hh1q30no&s=e8534d5086cc4c5e2f85b797700244f7f5ea6195
http://onlinelibrary.wiley.com/store/10.1111/j.1750-3841.2010.01690.x/asset/j.1750-3841.2010.01690.x.pdf?v=1&t=hh1q30no&s=e8534d5086cc4c5e2f85b797700244f7f5ea6195
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών