Combined Effect of High Hydrostatic Pressure and Nisin on Loss of Viability, Membrane Damage and Release of Intracellular Contents of Bacillus subtilis and Escherichia coli
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Wei-Min Qi
Bacillus subtilis and Escherichia coli were chosen to investigate the combined effect of high hydrostatic pressure (HHP) and Nisin on loss of viability, membrane damage and release of intracellular contents of microorganisms. The results showed that the combination of 200 IU/mL Nisin and HHP exhibited a synergistic effect over 2 log on the inactivation of B. subtilis at pressure 300 MPa. The similar synergistic effect was observed on the membrane damage and release of intracellular contents of B. subtilis. The Nisin alone had no effect against E. coli, which belongs to gram negative bacteria. However, at pressure 300 MPa, Nisin caused the membrane damage from 55% to 80%. The synergistic effect of Nisin and HHP on loss of viability, membrane damage and release of intracellular contents of E. coli were also illustrated when the HHP pressure exceeded 300 MPa as the consequence of the serious changes produced by HHP at higher pressure in the cell envelope. It allows the entry of Nisin molecules to cell membrane.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Artikel in diesem Heft
- Article
- Evaluation of Geometric Symmetry Condition in Numerical Simulations of Thermal Process of Packed Liquid Food by Computational Fluid Dynamics (CFD)
- Effect of Soy Cheese and Trisodium Citrate on Pizza Cheese
- Combined Effect of High Hydrostatic Pressure and Nisin on Loss of Viability, Membrane Damage and Release of Intracellular Contents of Bacillus subtilis and Escherichia coli
- Desorption of Vitamin E from Silica-Packed Fixed-Bed Column by Isopropanol
- Physico-Chemical Characterisation of Opuntia dillenii Fruit
- Cooling Optimization and Discrete Time Event Simulation
- Kinetic and Thermodynamic Characteristics of Seaweed Dried in the Convective Air Drier
- Aspect Ratio Analysis Using Image Processing for Rice Grain Quality
- Water Absorption Characteristics of Nigerian Acha (Digitaria exilis)
- Simulation of the Transport Phenomena during Food Drying with Ohmic Heating in a Static System
- Effect of High Hydrostatic Pressure Processing on Lycopene Isomers
- Shorter Communication
- Non-Thermal Microwave Reduction of Pathogenic Cellular Population
- Moisture Dependent Physical Properties of Grape Seeds
- Development of a Linear Heat Source Probe and Determination of Banana Thermal Conductivity
