Thesis topic proposal
Zoltán Kókai
László Baranyai
Evaluation of effect of ohmic heating on sensory properties of food


Institute: Szent István University, Gödöllő
food sciences
Doctoral School of Food Sciences

Thesis supervisor: László Baranyai
co-supervisor: Zoltán Kókai
Location of studies (in Hungarian): Szent István University, Doctoral School of Food Science, 1118 Budapest Villányi street 29-43.
Abbreviation of location of studies: SZIE

Description of the research topic:

Background: Commercial ohmic heating and cooking equipments are already available using standard AC power supply of 230 V and 50 Hz. Instrumental measurements were performed to investigate physical change of fruit, vegetable and meat tissue during electric treatment of Joule heating. Sensory evaluation tests compared treated products to traditional technology and decided on acceptability according to thresholds.

Objectives: The main goal is to optimize ohmic heating technology parameters for food safety and best consumer satisfaction. Thermal vision is to help optimization of uniformity of treatment and geometry of treatment chamber. Triangle sensory tests are to evaluate difference of technologies and detailed investigation of effects will be based on profile analysis.

Expected results: Multivariate models are to be developed for optimization purposes. Relationship between sensory attributes and selected parameters of ohmic heating might be used in sorting/grading and optimization. Preference map model can be built for food products prepared with ohmic heating.

Number of students who can be accepted: 1

Deadline for application: 2018-06-30

All rights reserved © 2007, Hungarian Doctoral Council. Doctoral Council registration number at commissioner for data protection: 02003/0001. Program version: 2.2358 ( 2017. X. 31. )