Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
The supply of microbiological risk-free water is essential to keep food safety and public hygiene. And removal, inactivation, and destruction of microorganisms in drinking water are key for ensuring safety in the food industry. Ultraviolet-C (UV-C) irradiation is an attractive method for efficient disinfection of water without generating toxicity and adversely affecting human health. In this study, the disinfection efficiencies of UV-C irradiation on (Gram negative) and (Gram positive) at various concentrations in drinking water were evaluated using a water purifier. Their morphological and physiological characteristics after UV-C irradiation were observed using fluorescence microscopy and flow cytometry combined with live/dead staining. UV-C irradiation (254 nm wavelength, irradiation dose: 40 mJ/cm) at a water flow velocity of 3.4 L/min showed disinfection ability on both bacteria up to 10 CFU/4 L. And flow cytometric analysis showed different physiological shift between and after UV-C irradiation, but no significant shift of morphology in both bacteria. In addition, each bacterium revealed different characteristics with time-course observation after UV-C irradiation: dramatically changed its physiological feature and seemed to reach maximum damage at 4 h and then recovered, whereas seemed to gradually die over time. This study revealed that UV-C irradiation of water purifiers is effective in disinfecting microbial contaminants in drinking water and provides basic information on bacterial features/responses after UV-C irradiation.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9895992 | PMC |
| http://dx.doi.org/10.4014/jmb.2211.11027 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Investigation of 222-nm ultraviolet C irradiation bactericidal effect on the surgical field in a rabbit model.
Photochem Photobiol
September 2025
Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Ultraviolet C (UV-C) not only has a bactericidal effect, but is also cytotoxic; however, UV-C at a wavelength of 222 nm with a high absorption coefficient for proteins is considered safe. We have previously reported the safety of 222-nm UV-C irradiation in humans and rabbits. This study evaluated the bactericidal effect of 222-nm UV-C irradiation on exposed surgical fields.
View Article and Find Full Text PDFA review on anthracnose disease caused by Colletotrichum spp. in fruits and advances in control strategies.
Int J Food Microbiol
November 2025
Department of Agricultural Engineering, Faculty of Agricultural Technology, University of Brawijaya, Jl. Veteran Malang, 65145, Indonesia.
Fruits are a vital source of essential vitamins, minerals, and antioxidants necessary for human health and well-being. However, fruit production is often hampered by diseases that cause substantial yield losses and compromise fruit quality. Among these, anthracnose caused by various species of the Colletotrichum genus stands out as a particularly destructive disease, affecting a wide range of fruit crops and resulting in significant preharvest and postharvest losses worldwide.
View Article and Find Full Text PDFImpact of UV‑C Light Treatment on the Vitamin D Content and Quality of Bread.
ACS Omega
August 2025
Beko, Research & Development Center, Istanbul 34950, Turkey.
Vitamin D deficiency is a global health concern linked to various chronic diseases. Although food fortification is a promising solution, its implementation remains limited by processing losses, matrix inconsistency, and clean-label trends. Certain foods, including mushrooms and yeast-containing bakery products, naturally contain provitamin D (ergosterol), which can be photoconverted into vitamin D by ultraviolet (UV) light.
View Article and Find Full Text PDFQuinine and Quinidine Derivatives as Photosensitizers for Photodynamic Inactivation of Bacterial Pathogens.
J Nat Prod
August 2025
Department of Organic and Medicinal Chemistry, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
This study reports the synthesis and characterization of 5-azoniabenzo[]tetraphene derivatives of alkaloids with potential applications in antimicrobial photodynamic therapy (aPDT). These compounds exhibit absorption maxima at 430-441 nm, as well as in the UV-A (340-342 nm) and UV-C (270-275 nm) regions, with fluorescence emission peaks ranging from 519 to 534 nm. At nontoxic concentrations of 2 μg mL and upon irradiation with blue light (418 nm), these compounds demonstrated potent bactericidal activity depending on the light dose.
View Article and Find Full Text PDFAssessment of the anti-biofilm effect of UV-C irradiation (254 nm) against healthcare associated infections related microorganisms.
Front Microbiol
July 2025
Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.
Introduction: Biofilm-related Multidrug Resistance (MDR) is a major problem in healthcare-associated infections (HAI). Hospital surface decontamination is essential to ensure the safety of patients and to eliminate the dissemination of MDR pathogens. New eco-friendly decontamination technologies, such as UV-C irradiation, are only gaining popularity now, but their use against the biofilm of common microorganisms causing HAI has not been properly assessed.
View Article and Find Full Text PDF