This study evaluated the effect of simultaneous irradiation with vacuum ultraviolet (VUV)-amalgam lamp and near-infrared radiation (NIR) to inactivate foodborne pathogens in black peppercorn (Piper nigrum) while monitoring its piperine content and color. NIR treatment for 20 min caused an increase in black peppercorn temperature to 70 °C, and its bactericidal effect showed only 3.14 and 1.88 log reductions of Escherichia coli O157:H7 and Salmonella Typhimurium respectively. Single treatment with a VUV-amalgam lamp for 20 min achieved 2.26 and 1.55 log reductions of E. coli O157:H7 and S. Typhimurium, respectively. However, simultaneous treatment for 15 min produces a greater than 5-log reduction of both foodborne pathogens without changes of black peppercorn quality. The underlying bactericidal mechanism of the VUV-amalgam lamp is 254 nm irradiation with ozone generated by 185 nm irradiation. The ozone concentration was maintained with VUV-amalgam lamp single treatment but decreased during simultaneous treatment. In contrast, due to the drying effect of NIR irradiation, water vapor reacts with 185 nm irradiation or ozone to produce a variety of reactive oxygen species (ROS) such as hydrogen peroxide and hydroxyl radical during simultaneous treatment. The hydrogen peroxide concentration measured by Gastec increased during simultaneous treatment. We also investigated various generated types of ROS that can contribute to a synergistic bactericidal effect. We compared the bactericidal effect of sequential and simultaneous treatments with NIR and VUV-amalgam lamps to black peppercorn. Although sequential treatment showed additional inactivation efficacy, reductions of pathogens were significantly lower than with simultaneous treatment. These findings suggest that simultaneous VUV-amalgam lamp and NIR irradiation treatment via generation of ROS can increase bacterial inactivation efficacy of foodborne pathogens in black peppercorns without quality changes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.foodres.2023.112827 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Financial Difficulty Over Time in Young Adults With Breast Cancer.
JAMA Netw Open
November 2024
Breast Oncology Program, Dana-Farber Brigham Cancer Center, Boston, Massachusetts.
Importance: Young adults aged 18 to 39 years represent the minority of breast cancer diagnoses but are particularly vulnerable to financial hardship. Factors contributing to sustained financial hardship are unknown.
Objectives: To identify financial hardship patterns over time and characterize factors associated with discrete trajectories; it was hypothesized that treatment-related arm morbidity, a key source of expense, would be associated with long-term financial difficulty.
Salmonella in black pepper (Piper nigrum): From farm to processing.
Int J Food Microbiol
January 2025
Laboratory of Enviromental Sampling, Center for Research Innovation and Developing (LACAR/CPID), Ladeira Eliezer Batista, Jardim América, Cariacica, Espírito Santo 29140-500, Brazil.
Contamination of black pepper (Piper nigrum) with Salmonella is a frequent problem in retail and imported shipments. However, there is scarce information about the prevalence of the pathogen in the initial stages of black pepper production chain. This study sought to bridge this gap in research by determining the prevalence, as well as quantifying, and identifying the main Salmonella serovars present during black pepper primary production and processing.
View Article and Find Full Text PDFRace and Ethnicity Representation in Phase 2/3 Oncology Clinical Trial Publications: A Systematic Review.
JAMA Health Forum
June 2024
Department of Radiation Oncology, Cleveland Clinic, Cleveland, Ohio.
Importance: The five 1997 Office of Management and Budget races in the US include American Indian or Alaska Native, Asian, Black or African American, Native Hawaiian or Other Pacific Islander, and White, with Hispanic ethnicity. Despite the Affordable Care Act mandating Office of Management and Budget-based collecting and reporting standards, race and ethnicity publishing in medical journals is inconsistent, despite being necessary to achieve health equity.
Objective: To quantify race and ethnicity reporting rates and calculate representation quotients (RQs) in published oncology clinical trials.
Assessment of metabolome diversity in black and white pepper in response to autoclaving using MS- and NMR-based metabolomics and in relation to its remote and direct antimicrobial effects against food-borne pathogens.
RSC Adv
March 2024
Pharmacognosy Department, College of Pharmacy, Cairo University 11562 Cairo Egypt
L. (black and white peppercorn) is one of the most common culinary spices used worldwide. The current study aims to dissect pepper metabolome using H-NMR targeting of its major primary and secondary metabolites.
View Article and Find Full Text PDFRadiofrequency Inactivation of Salmonella in Black Pepper and Dried Basil Leaves Using In-package Steaming.
J Food Prot
February 2024
Department of Food Science, University of Arkansas System, Division of Agriculture, Fayetteville, AR 72701, USA. Electronic address:
Radiofrequency (RF) heating has been extensively studied for pasteurizing low-moisture foods. Currently, bulk foods are treated with radiofrequency; potential cross-contamination may occur during packaging of pasteurized products. As an alternative, in-package RF processing was evaluated for Salmonella inactivation on black peppercorns and dried basil leaves and prevention of cross-contamination during storage postprocessing.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!