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<p>Objective 1: Build a systematic understanding of the PL dose (fluence) multiplication effect observed in prior experiments, using different media (water, various coated and not coated solid barriers such as transparent packaging materials, glass, quartz) and PL conditions. The effect on both total PL fluence and PL spectrum will be evaluated. Objective 2: Determine the optimal conditions that allow maximization of PL fluence and PL penetrations for surface treatments. Objective 3: Validation of findings by conducting controlled PL treatments on model surfaces inoculated with several foodborne pathogenic microorganisms (or their surrogates), under the optimal conditions identified as a result of Objectives 1 and 2. Objective 4: Design effective PL treatments for a variety of real food applications. </p>
<p>NON-TECHNICAL SUMMARY: The goal of this project is to develop efficient methods for in-package microbial decontamination of food surfaces, applicable both in processing and retail facilities. Building on prior findings, we will work on enhancing the effectiveness of light based treatments through transparent packaging. This will increase food safety and quality and will help reduce food product recalls in NY and the US. </p>