Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
A MODEL FOR PASTEURIZATION WITH MICROWAVES IN A TUBULAR FLOW REACTOR
Date
1991-05-01
Author
OZILGEN, S
OZILGEN, M
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
223
views
0
downloads
Cite This
Thermal death kinetics of Escherichia coli with microwaves were studied by using a tubular flow reactor with different diameters, lengths, and flow rates. Mathematical models were presented for temperature profile development and death of the microorganisms along the reactor. A first-order kinetic expression in biomass concentration simulated the death phenomena. Temperature effects on the death rate constant were expressed with an Arrhenius expression. Numerical values of the constants of this expression were found to be considerably different in microwave pasteurization experiments from those of the experiments with a constant temperature water bath. These constants were also affected by the average velocity of the medium in the reactor. Apparent death rate constants were higher with the microwave pasteurization experiments than those of the constant temperature water bath experiments at low temperatures. The results implied that tubular flow reactors may be efficiently used, especially in low-temperature pasteurization and sterilization processes.
Subject Keywords
Biotechnology
,
Applied Microbiology and Biotechnology
,
Biochemistry
URI
https://hdl.handle.net/11511/65811
Journal
ENZYME AND MICROBIAL TECHNOLOGY
DOI
https://doi.org/10.1016/0141-0229(91)90205-o
Collections
Department of Food Engineering, Article
Suggestions
OpenMETU
Core
Kinetic analyses of the effects of temperature and light intensity on growth, hydrogenm production and organic acid utilization by rhodobacter capsulatus
Sevinç, Pelin; Gündüz, Ufuk; Department of Biotechnology (2010)
Effects of temperature and light intensity on photofermentative hydrogen production by Rhodobacter capsulatus DSM1710 by use of acetic and lactic acids as substrates were studied. Experiments were conducted at 20, 30 and 38oC incubator temperatures under light intensities in the 1500 – 7000 lux range. pH of the medium and quantity of hydrogen forming together with quantity of biomass, and concentrations of acetic, lactic, formic, butyric and propionic acids in the medium were determined periodically. Growth...
SURVIVAL KINETICS OF LACTIC-ACID STARTER CULTURES DURING AND AFTER FREEZE-DRYING
BOZOGLU, F; OZILGEN, M; BAKIR, U (Elsevier BV, 1987-09-01)
Survival kinetics of lactic acid starter cultures were modeled considering the microorganism and external medium interfacial area as the critical factors determining the resistance of the microorganisms to freeze-drying. Surviving fraction of the microorganisms increased with the increasing biomass concentration during freeze-drying, and this is attributed to the mutual shielding effect of the microorganisms against the severe conditions of the external medium. Survival of the microorganisms over the storag...
KINETICS OF MICROBIAL-GROWTH, GAS-PRODUCTION, AND DOUGH VOLUME INCREASE DURING LEAVENING
AKDOGAN, H; OZILGEN, M (Elsevier BV, 1992-02-01)
Microbial growth, gas production, and volume increase were studied experimentally at 10-degrees-C, 15-degrees-C, 20-degrees-C, 25-degrees-C, and 30-degrees-C in a sourdough production process. Microbial growth was simulated with the logistic equation. Gas production and dough volume increase rates were simulated with the Luede-king-Piret and saturation equations, respectively. In a leavening process, carbon dioxide is produced by the Bakers' yeast and entrapped into the gas cells formed by the gluten fil...
ON THE THERMODYNAMICS OF MICROBIAL-GROWTH PROCESSES
SANDLER, SI; ORBEY, H (Wiley, 1991-10-05)
In this article, we provide a rigorous thermodynamic analysis of microbial growth processes, clarify the role of the generalized degree of reduction concept as it is used in both stoichiometric equations and as a characterizing factor for thermophysical properties, and introduce a classification method to account for errors when using the generalized degree of reduction to estimate the energy and free energy contents of molecules. We maintain the advantages of using the generalized degree of reduction whil...
Submerged cultivation of Scytalidium thermophilum on complex lignocellulosic biomass for endoglucanase production
Ögel, Zümrüt Begüm; Yarangumeli, K; Dundar, H; Ifrij, I (Elsevier BV, 2001-05-07)
Scytalidium thermophilum endoglucanase production was analyzed on lignocellulosic biomass in submerged cultures at 45 degreesC and 155 rpm for S days. Endoglucanase, adsorbability of endoglucanase onto avicel, as well as exoglucanase, and filter paper activities were determined and compared with those on microcrystalline cellulose (avicel) as the main source of carbon. Lentil bran and sunflower seed bagasse yielded c. 1.5 fold more endoglucanase and avicel-adsorbable endoglucanase activity than avicel, and ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. OZILGEN and M. OZILGEN, “A MODEL FOR PASTEURIZATION WITH MICROWAVES IN A TUBULAR FLOW REACTOR,”
ENZYME AND MICROBIAL TECHNOLOGY
, pp. 419–423, 1991, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65811.