+44 (0)24 7671 8970
More publications     •     Advertise with us     •     Contact us
News Article

UV Dose Research Completed on COVID-19

News

University of Miyazaki, Japan, study provides data on the disinfection possibilities of UV-LEDs to aid the fight against COVID-19

AquiSense Technologies, a maker of UV LED disinfection systems, is sharing the latest research conducted on SARS-CoV-2 (the virus which causes COVID-19) with UV-C LED technology. University of Miyazaki, Japan, conducted the research on SARS-CoV-2 isolated from the Diamond Princess cruise ship, which saw numerous cases early in the pandemic. Researchers exposed the virus to radiation from Nikkiso UV-C LEDs (280 nm peak) to determine a UV Dose response curve.

“This work certainly bolsters the case for the use of UV-C LEDs for societal benefit against SARS-CoV-2. Considering the large number of research projects underway exploring the efficacy of UV-C on the virus, we can expect the supporting body of evidence to only increase,” said AquiSense CTO, Jennifer Pagan.

The study used an infectivity assay on Vero cells to measure inactivation the SARS-CoV-2 under UV-C LED irradiation. By varying exposure time for each sample the researchers were able to generate a series of data points known as a ‘dose response curve’; data such as these are used throughout the UV industry, allowing system designers to match a target UV exposure to a desired degree of inactivation. This study is the first demonstration of a UV Dose response curve for SARS-CoV-2.

Analysis of these data gives a D90 value (the UV Dose required to achieve a 90% reduction) in the 4.2 – 5.3 mJ cm-2 range, indicating that SARS-CoV-2 may be more susceptible to UV exposure than other common viruses such as norovirus. However, a low starting concentration of the virus limited the maximum inactivation that could be measured to 3.3-log (99.95%) and may have resulted in an effect known as ‘tailing’. Both features limit conclusions which can be drawn from the data.

The graph above shows replotting of the data presented by Inagaki, et al. 2020. The low initial concentration of viral particles within the study impacted measurement of the inactivation effect at all doses above 7.5 mJ cm-2.

Rich Simons, head of application science at AquiSense added “The more we learn about the way this virus behaves the better we can design systems to combat it effectively. This study is certainly not the end of discussion on UV as a tool for SARS-CoV-2 inactivation but adds a useful datapoint to our ongoing analysis and gives us confidence that we’re on the right track.”

CS International to return to Brussels – bigger and better than ever!


The leading global compound semiconductor conference and exhibition will once again bring together key players from across the value chain for two-days of strategic technical sessions, dynamic talks and unrivalled networking opportunities.


Join us face-to-face on 18-19 April 2023

  • View the agenda.
  • 3 for the price of 1. Register your place and gain complementary access to TWO FURTHER industry leading conferences: PIC International and Power Electronics International.
  • Email info@csinternational.net  or call +44 (0)24 7671 8970 for more details.

Register

Fairview releases waveguide frequency multipliers
Zuken and CSA Catapult present R&D results
Chips per car to rise to over a thousand
CML launches low power GaAs pHEMT gain blocks
European pilot line for perovskite tandem PVs
Transphorm opens GaN application lab in China
Sivers Semi signs $16.4 million satcoms deal
Meeting demand for purified graphite
Indium Precision Au-Based Die-Attach Preforms at SPIE Photonics West
ROHM and BASiC Semiconductor form a strategic partnership
Indium Introduces LED Paste for Advanced Mini/MicroLED Applications
SiC to service buses and trucks
STMicroelectronics and Soitec cooperate on SiC substrate manufacturing technology
Midsummer signs four LOI’s for 224 MW of thin film panels
OLED display technology in smartphones on the rise
Innoscience signs global deal with Richardson RFPD
Onsemi ramps SiC production
Fairview releases temperature-compensated amps
Kyocera develops novel GaN laser chip
BluGlass partners with Ganvix on green VCSELs
Scantinel lands €10M for next gen LiDAR
Researchers control light quanta with sound waves
Rohm, Mazda, and Imasen sign SiC e-Axle deal
HKUST team develops way to couple III-V and silicon
Veeco appoints Lena Nicolaides to board
Filtronic opens design centre in Manchester
Hunan Sanan secures $524M SiC order from NEV brand
BluGlass shows feasible reliability of GaN laser diodes
Perovskite-CIGS tandem is over 21 percent efficient
Silanna UV targets nitrate sensing applications
BorgWarner to invest $500M in Wolfspeed
UK orders Nexperia to divest Newport Wafer Fab
×
Search the news archive

To close this popup you can press escape or click the close icon.
×
Logo
×
Register - Step 1

You may choose to subscribe to the Compound Semiconductor Magazine, the Compound Semiconductor Newsletter, or both. You may also request additional information if required, before submitting your application.


Please subscribe me to:

 

You chose the industry type of "Other"

Please enter the industry that you work in:
Please enter the industry that you work in: