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Use of response surface methodology to investigate the effect of food constituents on Staphylococcus aureus inactivation by high pressure and mild heat

Paper ID Volume ID Publish Year Pages File Format Full-Text
36171 45123 2006 8 PDF Available
Title
Use of response surface methodology to investigate the effect of food constituents on Staphylococcus aureus inactivation by high pressure and mild heat
Abstract

The previous experimental results for effect of high pressure and mild heat on Staphylococcus aureus in milk using response surface methodology showed that the optimum process parameters for six log-cycles reduction of S. aureus were obtained as: temperature, 34.4 °C; pressure, 329.8 MPa; pressure holding time, 15.5 min. Based on the results, response surface methodology (RSM) was employed in the present work, the effect of food main constituents like soybean protein, sucrose, bean oil and pH of the food matrix on the S. aureus inactivation by high pressure and mild heat was studied, and a quadratic predictive model for the effect of food constituents and pH of food matrix on S. aureus reduction by high pressure and mild heat was built with RSM accurately. The experimental results showed that the efficiencies of S. aureus reduction in milk and food matrix designed in the present work under the HHP treatment process parameters described above had some differences. The soybean protein (P = 0.0082), sucrose (P < 0.0001), and pH (P = 0.0429) significantly affected reduction of S. aureus, and the effect of bean oil on reduction of S. aureus was not significant (P = 0.2790). The adequacy of the predictive model equation for predicting the magnitude orders of S. aureus reduction was verified effectively by the validation data.

Keywords
High pressure processing (HPP); Reduction of Staphylococcus aureus; Response surface methodology (RSM); Food constituents; Predictive model; Effect
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Use of response surface methodology to investigate the effect of food constituents on Staphylococcus aureus inactivation by high pressure and mild heat
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 2, February 2006, Pages 362–369
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us