Mathematical modeling of survival and weight loss of Baker's yeast during drying

Date

1996-10-01

Author

Alpas, Hami
BOZOGLU, F
KATNAS, S

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

159
views

0
downloads

Drying and death rates of Baker's yeast were studied in a computer-controlled laboratory scale tunnel drier with varying air velocity between 2.0-3.0 ms-1 and temperatures within the range of 40-60 degrees C. Two falling rate periods were observed during the drying process. A single first-order expression described the death rate of the microorganisms during both drying phases. Arrhenius-type expressions described the effects of the temperature on the first falling rate period drying and death rate constants. Compensation relations were also found between the parameters of these Arrhenius expressions. A single linear relation was observed between the first falling rate period drying constant and the death rate constant at 2.5 with 3.0 m s(-1) for air velocity. A similar relation was also observed with the data obtained at 2.0 m s(-1) of air velocity. It was concluded that the death rate of yeast was lower with a slower air velocity.

Subject Keywords

Baker's yeast, Drying, Modeling, Microbial death

URI

https://hdl.handle.net/11511/39414

Journal

ENZYME AND MICROBIAL TECHNOLOGY

DOI

https://doi.org/10.1016/s0141-0229(96)00027-0

Collections

Department of Food Engineering, Article

Suggestions

OpenMETU
Core

Enhanced thermal conductivity of nanofluids: a state-of-the-art review Özerinç, Sezer; Yazicioglu, Almila Guevenc (2010-02-01) Adding small particles into a fluid in cooling and heating processes is one of the methods to increase the rate of heat transfer by convection between the fluid and the surface. In the past decade, a new class Of fluids called nanofluids, in which particles of size 1-100 nm with high thermal conductivity are Suspended in a conventional heat transfer base fluid, have been developed. It has been shown that nanofluids containing a small amount of metallic or nonmetallic particles, Such as Al2O3, CuO, Cu, SiO2,...
3D finite element simulation of steel quenching in order to determine the microstructure and residual stresses Şimşir, Caner; Gür, Cemil Hakan; Department of Metallurgical and Materials Engineering (2008) In the course of thermal treatments, materials are usually subjected to continuous heating and cooling cycles during which microstructural evolution and mechanical interactions occur simultaneously at different length and time scales. Modeling of these processes necessitates dealing with inherent complexities such as large material property variations, complex couplings and boundary conditions, coupled heat and mass transfer mechanisms and phase transformations. In this study, a mathematical framework based...
Metamaterial Sensor Applications Based on Broadside Coupled SRR and V Shaped Resonator Structures EKMEKÇİ, EVREN; Sayan, Gönül (2011-07-08) In this study, the use of broadside-coupled SRR (BC-SRR) metamaterial topology is suggested for pressure, temperature, humidity and concentration sensor applications. Also, the use of V-shaped resonator topology is suggested for pressure sensor application. The feasibility of such sensors are demonstrated by numerical simulations for microwave region under magnetic excitation.
Numerical investigation of coupled heat and mass transfer inside the adsorbent bed of an adsorption cooling unit Solmus, Ismail; Rees, D. Andrew S.; Yamali, Cemil; Baker, Derek Keıth; KAFTANOĞLU, BİLGİN (2012-05-01) In this study, the influence of several design parameters on the transient distributions of temperature, pressure and amount adsorbed in the radial direction of a cylindrical adsorbent bed of an adsorption cooling unit using silica gel/water have been investigated numerically. For this purpose, a transient one-dimensional local thermal non-equilibrium model that accounts for both internal and external mass transfer resistances has been developed using the local volume averaging method. For the conditions in...
Thermal stress problems ın FGMS Akdoğan, Esra Nur; Kadıoğlu, Fevzi Suat; Department of Mechanical Engineering (2019) In this thesis transient temperature distribution, thermal stresses and thermal stress intensity factors (TSIFs) of an infinitely long functionally graded material (FGM) strip containing periodic cracks under thermal shock are studied. Thermal shock is applied by imposing a sudden change in the boundary temperatures. Solution of the present thermoelasticity problem is considered in three successive steps. First the thermal (conduction) problem is solved and the transient temperature distribution is determin...

Citation Formats

H. Alpas, F. BOZOGLU, and S. KATNAS, “Mathematical modeling of survival and weight loss of Baker’s yeast during drying,” ENZYME AND MICROBIAL TECHNOLOGY, pp. 348–351, 1996, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39414.