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Production of shelf-stable ranch dressing using high-pressure processing.
J G Waite1, J M Jones, E J Turek
1Dept of Food Science and Technology, Parker Food Science Building, The Ohio State Univ, Columbus, OH 43210, USA.
Journal of Food Science
|March 28, 2009
Summary
High-pressure processing (HPP) effectively preserved ranch dressing against microbial spoilage for 26 weeks without negatively impacting quality. This food preservation method offers a viable alternative to thermal treatments for premium products.
Area of Science:
- Food Science
- Microbiology
- Food Preservation Technologies
Background:
- High-pressure processing (HPP) offers a non-thermal food preservation method.
- HPP can maintain food quality better than thermal processing.
- HPP is suitable for foods sensitive to heat or those benefiting from pH adjustment.
Purpose of the Study:
- To evaluate the efficacy of HPP in preventing microbial spoilage in premium ranch dressing.
- To assess the impact of HPP on the physical, chemical, and sensory attributes of ranch dressing during shelf life.
- To determine the optimal HPP conditions for ranch dressing preservation.
Main Methods:
- Inoculated-package studies were conducted using key ranch dressing spoilage organisms.
- HPP treatments were applied at 600 MPa for 3 or 5 minutes.
- Shelf-life studies involved storing HPP-treated ranch dressing at 4°C and 26°C for up to 26 weeks.
Main Results:
- HPP treatment (600 MPa, 5 min) significantly reduced spoilage organisms like Pediococcus acidilactici by over 6.4 log CFU/g.
- Microbial spoilage was prevented throughout the 26-week storage period for HPP-treated ranch dressing.
- HPP did not adversely affect the pH or emulsion stability of the ranch dressing.
Conclusions:
- HPP is an effective technology for preserving premium ranch dressing, extending shelf life without compromising quality.
- Extended storage of HPP ranch dressing at 26°C led to decreased consumer acceptance and changes in color and organic acid profile.
- HPP allows for the production of premium ranch dressing with a defined shelf life and storage conditions.
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