Spice-nisin formulations for lactic acid bacteria contamination control in foods
Develop spice–nisin formulations that synergistically inhibit lactic acid bacteria (LAB) in food systems. The approach combines antimicrobial components from plant-based spices with the bacteriocin nisin to enhance LAB control, supporting improved food safety and shelf-life extension. Prior findings on thymol–nisin synergy inform formulation screening to identify effective blends for broader food applications.
Overview
The proposed solution focuses on innovative spice–nisin formulations aimed at addressing lactic acid bacteria (LAB) contamination in food systems. By leveraging synergistic effects between plant-based food spices and the bacteriocin nisin, this approach targets mitigation of LAB contamination, which is important for enhancing food safety and extending shelf life. The research builds on previous findings showing that combining thymol, a spice component, with nisin can produce a substantial antimicrobial effect.
Technical specifications
Key features:
- Synergistic formulation of plant-based spices with nisin
- Targeted inhibition of lactic acid bacteria in various food systems
- Tested and developed at Purdue University’s Department of Food Science
- Potential for application in large-scale food production, with trials planned in real-world settings
The formulation process involves preparing a variety of spice–nisin combinations and rigorously testing them to identify the most effective blends for LAB inhibition. This methodology is intended to provide a natural and effective means to combat bacterial contamination, improving safety and quality of food products.
Technology readiness level
This technology is currently at a Technology Readiness Level (TRL) of 4. It has been validated in a lab setting, and further trials are planned to assess efficacy in real-world applications.
About Purdue University
Purdue University is a comprehensive public land‑grant research institution in West Lafayette, Indiana, anchored by a large residential campus. Industry engages through co‑located core facilities, pilot‑scale testbeds, and an adjacent innovation district that brings together labs, corporate R&D space, and maker resources near faculty talent. A statewide Extension network and an established engineering co‑op program connect companies to field sites, workforce pipelines, and pragmatic pathways from concept to deployment across Indiana. Research is supported by competitive federal funding from NSF, DOE, USDA, NIH, and the Department of Defense, and commercialization is managed by a dedicated technology transfer office in partnership with the university’s affiliated research foundation.
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