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Measurement of excited singlet oxygen molecule in a vacuum sterilization system, using electric spin resonance (ESR) with a water-soluble polymer thin film

Paper ID Volume ID Publish Year Pages File Format Full-Text
25929 43920 2016 6 PDF Available
Title
Measurement of excited singlet oxygen molecule in a vacuum sterilization system, using electric spin resonance (ESR) with a water-soluble polymer thin film
Abstract

•Using ESR technique with a TEMP-PVA film, we invented to measure excited singlet oxygen molecules (1O2) in a vacuum environment.•1O2, which has an extremely short lifetime, has been detected at a place apart from UV irradiation.•Among the active oxygen species generated by UV irradiation, 1O2, with its high reactivity, was the principal species in the sterilization effect.

An advanced sterilization system employing active oxygen species (AOS) was investigated. We revealed in a previous paper that, by using active oxygen species generated from oxygen gas by ultraviolet irradiation in the chamber of the sterilization system, the survival curves of Geobacillus stearothermophilus spores (106 CFU), a biological indicator (BI), showed exponential reduction, and that this sterilization was attributable to the UV-generated AOS. However, we had little knowledge of what specific types of AOS were primarily responsible for the sterilization effects. Therefore, in this study we investigated the principal sterilization contributors among the AOS generated by ultraviolet irradiation, using the electron spin resonance (ESR) technique, with 2,2,6,6-tetramethyl-4-piperidinol (TEMP) as a spin-label reagent for the excited state of atomic oxygen molecules (1O2), and compared the respective sterilization effects of AOS and oxygen plasma system.

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Keywords
Active oxygen species; Sterilization; Excited singlet oxygen molecule; Polyvinyl alcohol; Electron spin resonance; Ultraviolet irradiation
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Measurement of excited singlet oxygen molecule in a vacuum sterilization system, using electric spin resonance (ESR) with a water-soluble polymer thin film
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 328, 1 September 2016, Pages 148–153
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us