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Inactivation of Escherichia Coli 0157:H7 and Staphylococcus Aureus by pulsed electric fields (PEF)
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093016.pdf
Date
2000
Author
Damar, Sibel
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https://hdl.handle.net/11511/7368
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Graduate School of Natural and Applied Sciences, Thesis
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Inactivation and injury of Escherichia coli O157 : H7 and Staphylococcus aureus by pulsed electric fields
DAMAR, SİBEL; Bozoglu, F; Hizal, MİRZAHAN; Bayındırlı, Alev (2002-02-01)
Two pathogenic microorganisms Escherichia coli O157:H7 and Staphylococcus aureus, suspended in peptone solution (0.1% w/v) were treated with 12, 14, 16 and 20 kV/cm electric field strengths with different pulse numbers up to 60 pulses. Pulsed electric field (PEF) treatment at 20 kV/cm with 60 pulses provided nearly 2 log reduction in viable cell counts of E. coli O157:H7 and S. aureus. S. aureus cells were slightly more resistant than E.coli O157:H7 cells. The results related to the effect of initial cell c...
Inactivation of Escherichia coli and Listeria innocua in kiwifruit and pineapple juices by high hydrostatic pressure
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Escherichia coli and Listeria innocua in kiwifruit and pineapple juices were exposed to high hydrostatic Pressure (HHP) at 300 MPa for 5 min. Both bacteria showed equal resistance to HHR Using low (0 degrees C) or subzero (- 10 degrees C) temperatures instead of room temperature (20 degrees C) during pressurization did not change the effectiveness of HHP treatment oil both bacteria in Studied juices. Pulse pressure treatment (multiple Pulses for a total holding time of 5 min at 300 MPa) instead of continuou...
Inactivation of Alicyclobacillus acidoterrestris by high hydrostatic pressure (HHP)
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Inactivation of Listeria monocytogenes and Escherichia coli by Ultrasonic Waves Under Pressure at Nonlethal (Manosonication) and Lethal Temperatures (Manothermosonication) in Acidic Fruit Juices
GUZEL, Burcin Hulya; ARROYO, Cristina; CONDON, Santiago; PAGAN, Rafael; Bayındırlı, Alev; Alpas, Hami (Springer Science and Business Media LLC, 2014-06-01)
The inactivation of Listeria monocytogenes and Escherichia coli suspended in apple and orange juices by ultrasound under pressure at nonlethal (manosonication, MS) and lethal temperatures (manothermosonication, MTS) was evaluated. Significant differences were found in the MS resistance (35 A degrees C, 110 mu m, 200 kPa) of three strains of L. monocytogenes and three of E. coli in pH 3.5 buffer, L. monocytogenes STCC 5672 and E. coli O157:H7 being the most resistant strains. Regarding the interspecific diff...
Inactivation of Staphylococcus aureus and Listeria monocytogenes in milk and cream of chicken soup by high hydrostatic pressure and bacteriocins
Alpas, Hami (2002-06-01)
By the application of HHP; 5.50 and 5.70 log cycle reduction was obtained for S. aureus 485, in milk and cream of chicken soup samples, respectively. Storage of HHP treated milk samples for 24 h at 4degreesC gave positive result for S. aureus 765 where no growth was observed for L. monocytogenes strains. Incubation of food samples for an additional 48 h at 37degreesC showed growth of L. monocytogenes strains as S. aureus strains. When a bacteriocin-based biopreservative (BP1) was combined with pressurizatio...
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S. Damar, “Inactivation of Escherichia Coli 0157:H7 and Staphylococcus Aureus by pulsed electric fields (PEF),” Middle East Technical University, 2000.