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Abstract

Dear Friends, I believe that UV is a key weapon now in our fight against an army of viruses, because the most dangerous is their exponential multiplication over time as we see here https://www.arcgis.com/apps/opsdashboard/index.html#/bda7594740fd40299423467b48e9ecf6 Now it’s necessary widely use the reliably UV disinfection inside airports, subway cars, inside all rooms in hospitals together with patients. This simple techniques used mercury lamps or UV LED having optimal wavelengths near 260 nm to damage the virus RNA. The radiation will ensure all disinfection of clothing, hair and skin of people, because this Sun like treatment is useful during several seconds, in principle, and does not cause harm for man (only the eyes should be protected under glasses or closed for a few minutes). It has long been known that it is ultraviolet with a wavelength of about 0.15 to 0.4 microns kills all microbes and viruses carefully. It's important that, ordinary window panes of glasses in our homes do not pass UV radiation absolutely. May be therefore, now there are too much aggressive Covid19 viruses. Previous study showed in particular that UV should have power K = 339-423 microwatt in second per square of cm2 at wavelength of 254 nm to get 90% air disinfection by measurements: https://www.tandfonline.com/doi/full/10.1080/02786820500428575 , https://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.highlight/abstract/1128/report/F , https://pikabu.ru/story/dezinfektant_dlya_koronavirusa_7195447 . Let’s analyze: a power, W, of light decreases inversely with distance ,R. Let's consider surface area of optimal sphere, S = 4 pi R2. Based on the previous mentioned data we should provide a value K = 400 micro Watts per 1 cm2 = 4 W\m2 in second. It should be equal to W/S = K, so all viruses will die after 1 second inside a sphere with a radius of about 1.4 meters at UV power W = 100 Watts, but as more power as better. The UV lamp production are at USHIO at 254 nm or at http://lisma.su/en/katalog-produktsii/trubchatye/index.html . The long-wave UV radiation emitted by the lamp is also useful because it quickly vaporizes the surrounding moisture near virus, then move your lamp along the hospital corridor forward ! The second way to implement the method is as follows. Now an airport employee measures the temperature of a passengers when they enter the building using an infrared sensor. This procedure should be supplemented with second step. Let each passenger close his eyes and additionally cover an eyes with own hands (palms out). An employee with dark glasses shines a UV lamp on the passenger during 10 seconds. Then passenger turns his back and again get 10 seconds of UV radiation to completely clear the passenger of viruses. It is known that the body of a healthy person has large number of microorganisms usually. Infectious doses of some dangerous diseases are 100 - 1 million virions ( Hepatitis B, etc.). It is obvious that we should mainly reduce the number of viruses anywhere, please use this method.
Dear Friends, I believe that UV is a key weapon now in our fight against an army of viruses. And the
most dangerous is their exponential multiplication over time as we see here
https://www.arcgis.com/apps/opsdashboard/index.html#/bda7594740fd40299423467b48e9ecf6
Now its necessary use reliably UV disinfection inside airports, subway cars, inside all rooms in hospitals
together with patients. This simple techniques are mercury lamps that is known for today. The radiation
will ensure all disinfection of clothing, hair and skin of people, the treatment is useful and does not
cause harm for man (only the eyes should be protected under glasses or closed for a few minutes). It has
long been known that it is ultraviolet with a wavelength of about 0.15 to 0.4 microns kills all microbes
and viruses carefully. It's important that, ordinary window panes of glasses in our homes do not pass UV
radiation at all. May be therefore, now there are a lot of aggressive Covid19 viruses. So it is necessary to
add additional UV sources inside the infected premises in order to kill as much viruses as possible, so
mathematicians will agree with me that this exponent of growth is very dangerous. Previous study
showed that UV destroyed a viruses single-stranded RNA, so in particular the UV should have power W =
339-423 microwatt in second per square of cm2 at wavelength of 254 nm to get 90% air disinfection by
measurements: https://pikabu.ru/story/dezinfektant_dlya_koronavirusa_7195447 ,
https://www.tandfonline.com/doi/full/10.1080/027868205004285
The power, W, of light decreases inversely with distance ,R. Let's consider surface area of optimal
sphere, S = 4 pi R2. Based on the previous mentioned data we should provide a value A = 400 micro
Watts per 1 cm2 = 4 W\m2 in second. It should be equal to W/S = A, so all viruses will die after 1 second
inside a sphere with a radius of 1.4 meters at UV lamp with power W = 100 Watts. If you take a lamp
with a power of 200 Watts, then all viruses inside radius of 2 meters will die in 1 second, then move your
lamp along the hospital corridor !
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