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The paper has been presented at the ceremonial lecture held on 29 April 2016 for the nomination of the main lecture hall in the Science Building after the genius professor Zoltan Bachman belonged to the Faculty of Engineering and Information Technology, University of Pecs.

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Agrokémia és Talajtan
Authors:
Katalin Sárdi
,
P. Csathó
,
I. Sisák
,
E. Osztoics
,
P. Szűcs
, and
Á. Balázsy
Restricted access
Acta Alimentaria
Authors:
K. Régaiszné Vajda
,
A.A. Halbritter
,
P. Szűcs
,
J. Szigeti
, and
B. Ásványi

Sous-vide (French for ʽunder vacuum’) is a professional cooking method, by which, under oxygen-free conditions and precise temperature control, not only cooking but preservation is achieved. During the process the food matrix is vacuum-packed and undergoes a mild heat treatment, thus achieving an enhanced nutrition value and a better organoleptic character. Due to the mild heat treatment (55 to 90 °C), the high water activity, and the slight acidity of raw materials, the microbial quality assurance is a great challenge even for professionals. The heat treatment does not assure the inactivation of pathogen spores. In our experiments we used Clostridium perfringens representing the spore-forming pathogens, and Salmonella Enteritidis as a the food-borne infection bacterium. Effects of various temperatures were measured in normal and sous-vide type vacuum packaging. Higher thermal death rate in vacuum packaging was demonstrated for Salmonella Enteritidis and Clostridium perfringens.

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Pollack Periodica
Authors:
Musaab A. A. Mohammed
,
Balázs Kovács
,
Norbert P. Szabó
, and
Péter Szűcs

Abstract

The multi-aquifer system of the Nubian aquifer in central Sudan hydrogeological system was simulated using a three-dimensional steady-state model. The goal of the study is to detect the effect of pumping on the groundwater flow and thus, the aquifer productivity. The conceptual model of the study area was built based on the available geological and hydrogeological data guided by geophysical survey. Processing MODFLOW numerical code was used to calculate the hydraulic head and water balance under the existing boundary conditions. The model accurately simulated the hydraulic head with a determination coefficient of 0.88. The calibrated model indicated that the change in storage is 0.56 m3/day indicating the study area constitutes highly productive zone and is recommended for groundwater developments.

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