کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4558924 1413196 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling of the microbial inactivation by high hydrostatic pressure freezing
ترجمه فارسی عنوان
مدل سازی انحلال میکروبی توسط انجماد فشار هیدرواستاتیک بالا
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
چکیده انگلیسی


• HPF is a novel application of High Hydrostatic Pressure treatment.
• HPF process is able to induce significant levels of microbial inactivation.
• The survival curves of the HPF treated cells may be described with the Weibull model.

This work aimed at investigating the effect of HPF processes on the inactivation kinetics of selected microbial strains, Escherichia coli O157:H7 ATCC 26 and Lactococcus lactis ssp. Cremoris suspended in McIlvine buffer. The effects of different processing conditions, namely pressure level (200–400 MPa), temperature (0, −10, −20 °C), treatment time (0, 2, 5, 7, 10 min) and number of phase transitions (single or multiple transitions) were investigated in the experimental trials. The mechanism of cell inactivation in complex processes, in which pressure and temperature are simultaneously changed, was also studied and the synergistic effect of the two processing parameters, if any, was identified. Experimental data were analyzed and fitted with mathematical models representing the kinetics of microbial inactivation in HPF processes.The results obtained so far demonstrated that the factor controlling the process efficiency is the pressure level at constant operating temperature. The level of inactivation obtained increased with decreasing the processing temperature at constant pressure or increasing the number of phase transitions, and with decreasing the size of ice crystals formed in the product. Finally, the kinetics of microbial death was described by a modified Weibull model, whose parameters are dependent on processing conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Control - Volume 73, Part A, March 2017, Pages 8–17
نویسندگان
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