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Photoinactivation of bacteria by endogenous photosensitizers and exposure to visible light of different wavelengths – a review on existing data
This review compiles the published data on bacterial inactivation caused by visible light and endogenous photosensitizers and evaluates more than 50 published studies containing information on about 40 different bacterial species irradiated within the spectral range from 380 to 780 nm.
Selection of parameters for thermal coronavirus inactivation – a data-based recommendation
- M. Hessling, K. Hoenes, C. Lingenfelder
- Materials Science, MedicineGMS hygiene and infection control
- 13 July 2020
Coronaviruses can already be inactivated at relatively low temperatures and the available data suggest that all samples, including critical ones, can be mathematically included by a worst-case Arrhenius model.
Improved Drinking Water Disinfection with UVC-LEDs for Escherichia Coli and Bacillus Subtilis Utilizing Quartz Tubes as Light Guide
A new approach is investigated utilizing light guidance capabilities of optical pure quartz glass in order to maximize drinking water disinfection efficiency with UVC-light-emitting diodes (LEDs).…
Photoinactivation Sensitivity of Staphylococcus carnosus to Visible‐light Irradiation as a Function of Wavelength
- K. Hoenes, U. Wenzel, B. Spellerberg, M. Hessling
- Chemistry, MedicinePhotochemistry and photobiology
This study investigates the photoinactivation sensitivity of Staphylococcus carnosus to selected wavelengths between 390 and 500 nm in 10‐ to 25‐nm intervals and points to flavins as responsible photosensitizers, which furthermore seem to be involved at violet wavelengths.
Photoinactivation of the Coronavirus Surrogate phi6 by Visible Light
Investigation of the effect of visible violet light with a wavelength of 405 nm on the coronavirus surrogate phi6 in two aqueous solutions that are free of photosensitizers finds that it reduces the phi 6 plaque‐forming unit concentration by three log‐levels.
405 nm and 450 nm Photoinactivation of Saccharomyces cerevisiae
- K. Hoenes, M. Hess, P. Vatter, B. Spellerberg, M. Hessling
- Medicine, ChemistryEuropean journal of microbiology & immunology
- 1 December 2018
The results are compatible with photoinactivated Saccharomyces cerevisiae cells being in a viable but nonculturable state, and arguing against the previously suspected mechanism of cell membrane damage during photoinactivation with visible light at least for the investigated strain.
Inactivation Effect of Violet and Blue Light on ESKAPE Pathogens and Closely Related Non-pathogenic Bacterial Species – A Promising Tool Against Antibiotic-Sensitive and Antibiotic-Resistant…
- K. Hoenes, R. Bauer, Tobias Meurle, B. Spellerberg, M. Hessling
- MedicineFrontiers in Microbiology
- 13 January 2021
Visible light irradiation is a promising approach to inactivate ESKAPE pathogens with future fields of application in prevention and therapy.
Improved contact lens disinfection by exposure to violet radiation.
- K. Hoenes, F. Stangl, A. Gross, M. Hessling
- MedicineTechnology and health care : official journal of…
The hitherto existing results give reason for the assumption that violet LEDs integrated in contact lens cases will provide a subsidiary disinfection activity and maybe even offer the reduction of chemical ingredients in lens cleaning solutions to become gentler to the eye.
Antimicrobial Effect of Visible Light—Photoinactivation of Legionella rubrilucens by Irradiation at 450, 470, and 620 nm
There is reason to believe that L. rubrilucens inactivation behavior is similar to that of pathogenic legionella species, and this photoinactivation might lead to new future concepts for legionella reduction and prevention in technical applications or even on or inside the human body.
Efficient Disinfection of Tap and Surface Water with Single High Power 285 nm LED and Square Quartz Tube
A small water disinfection system based on the combination of a strong single 25 mW LED with a wavelength of 285 nm and a short quartz tube with an outer rectangular cross section is presented. For…