Panasonic Corporation has announced that the company, in collaboration with the Japan Textile Products Quality Technology Center, has verified the inhibitory effect of nanoe™ on novel coronavirus adhering in a 24 m³ test space. This is the first time in the world that the inhibitory effect on adhering novel coronavirus has been verified in a test space almost as large as a daily living space.
nanoe™ is a technology that collects invisible moisture in the air and applies a high voltage to it to produce “hydroxyl radicals contained in water”. Hydroxyl radicals inhibit the growth of pollutants such as bacteria and viruses. They are characterised by being strongly oxidative and highly reactive, hence a short life span. Contained in tiny water particles, nanoe™ has a long lifespan and can spread around the space in a room. It has an inhibitory effect on both airborne and adhered substances.
The mutation of the amino acid in the spike protein has caused new variant strains with different infectivity, transmissibility, and antigenicity such as the increased binding capacity to cells and reduced binding to neutralizing antibodies. Consequently, the global spread of the novel coronavirus shows no sign of abating. Research is underway to identify the properties of the current dominant Omicron strain, but the increase in secondary infections in households and other factors suggest that its infectivity has increased compared to conventional strains, and further infection prevention measures are crucial.
Concerning the nanoe™ technology, Panasonic verified their inhibitory effect on the novel coronavirus (SARS-CoV-2)*² in July 2020 and its inhibitory effect on four novel coronavirus variants*³ in November 2021. The results of the previous tests were conducted in a small test space of 45-litres.
Therefore, Panasonic carried out a comparative experiment in a 24 m³ test space to compare virus titers with and without exposure to nanoe™. A piece of gauze saturated with the Delta strain of the novel coronavirus was exposed to nanoe™ for 8 hours and the inhibitory effect of more than 99% was confirmed. Note that the verification results are based on a test in a closed test environment and not in space actually in use.
Panasonic will continue to pursue the potential of nanoe™ technology and contribute to society by providing safer and more secure spaces.
For reference
Testing the inhibitory effect of of nanoe technology confirmed on the adhered novel coronavirus Delta variant (SARS-CoV-2) in a test space of approximately 24 m³
Overview
A comparative verification was conducted in a 24 m³ test space containing the adhered novel coronavirus Delta variant (SARS-CoV-2)
Results
The reduction in virus infection titer of more than 99% against the adhered novel coronavirus Delta variant (SARS-CoV-2) with the nanoe™technology was also verified in a 24 m³ test space.
Note: This verification was designed to generate basic research data on the effects of nanoe™ on the novel coronavirus in laboratory conditions different from those found in living spaces.
Results data
Methodology and data
Organisation: Japan Textile Products Quality and Technology Center (QTEC)
Subject: Adhered novel coronavirus Delta variant (SARS-CoV-2)
Device: nanoe™ device
Method
In a test space of 24 m³,place a piece of gauze saturated with the virus solution at a position 1.5m from nanoe™ generator and 1.2m from the floor, and exposed to nanoe™ (diffused into the test space by airflow from a blower installed on the wall).
The virus infection titer is measured and the inhibition rate is calculated *⁴
Principle of the generation of hydroxyl radicals
The atomization electrode is cooled by a Peltier element, which condenses moisture in the air to create water. Afterwards, a high voltage is applied across the atomization and the counter electrodes to generate “hydroxyl radicals contained in water” of approx. 5 to 20 nm in size.
*¹ Regarding ion emission type air cleaning technology (As of March 1, 2022, surveyed by Panasonic)
*² Verification of the inhibitory effect of hydroxyl radicals contained in water on the novel coronavirus (SARS-CoV-2) (Released in July 2020)
*³ Verified jointly with the Japan Textile Products Quality and Technology Center – Since the same decreasing trend was observed in the viral infection titer of the novel coronavirus and the four mutant strains regardless of the strains, an expert suggests that the “hydroxyl radicals contained in water” technology does not affect the inactivation effect of viral mutations caused by some amino acid substitutions, and that the same results can be expected for mutant strains that may appear in the future if tests are conducted under the same conditions of 45L.
*⁴ Based on “Test method for evaluating air purifiers’ performance in inhibiting viruses adhering indoors (established on July 4, 2011)” specified by the Japan Electrical Manufacturers’ Association