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Author Topic: COVID-19 🏴☠️ Pandemic  (Read 47549 times)

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AGelbert

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You can use a UV lamp to kill COVID-19 on a mask.
« Reply #150 on: April 06, 2020, 05:14:30 pm »
What is a UV lamp?

UV(Ultraviolet) is a kind of wave. It can classify by UV, UV-A, UV-B, and UV-C.

UV WAVE

The UV (UV) wavelength region is set between the X-ray (≤100 nm) and the visual (>400 nm) bands of the electromagnetic spectrum. As such, UV light can be classified into four wavelengths according to its interaction with molecules: vacuum UV (VUV) at 100–200 nm; UV C (UVC) at 200–280 nm; UV B (UVB) at 280–315 nm; and UV A (UVA) at 315–400 nm.21-24 The main physiologic effects, steaming from the photonic energy, can be described as:

• VUV light: including wavelengths <200 nm; is harmful due to its capability of immediate reaction with oxygen atoms and organic molecules even at low doses.

• UVC light: wavelength range lies between 200 and 280 nm; this electromagnetic spectrum has biocidal effects and generally is reported as “germicidal” or more usually “ultraviolet germicidal irradiation” (UVGI).

• UVB light: comprises wavelengths between 280 to 315 nm; these photons are known for “sunburning” of the skin and have been implicated in photocarcinogenesis and photoaging.

• UVA light: comprises wavelengths between 315 to 400 nm; it is becoming realized that the shorter UVA wavelengths (called UVA1, 315–340 nm) can have also had detrimental effects on the skin due to production of reactive oxygen species.

Notice:
1, The UV light is made by the professional factory.
2, When you are using UV light, pls make sure there is no living body in the space (including animals, plants and people). Because the UV light will cause damage to human eyes and skin.
3, Operation time more than 15 min will more effective.
4, After an operation, please air the space then will remove the bad smell.

Where can we use the UV lamp?

UV lamps can use in many places. We can use UV lamps for hospital disinfection.

We also can use UV lamps in hotels, restaurants, factories, and other public places.

Now we can DIY a UV lamp to clean our mask. That is safe for us.

More info:
https://www.lightstec.com/kill-coronavirus-uv-lamp-ultra-buying-guide/

Disinfecting UV Lamp NEWS FROM VERMONT

A Poultney company is ramping up production of its disinfecting UV lamps, which could be used to sterilize the masks health professionals wear in the fight against the coronavirus. Read the latest Making It in Vermont


Pertinet information about the effectivelness of UV radiation:

The effectiveness of germicidal UV depends on the length of time a microorganism is exposed to UV, the intensity and wavelength of the UV radiation, the presence of particles that can protect the microorganisms from UV, and a microorganism's ability to withstand UV during its exposure.

In many systems, redundancy in exposing microorganisms to UV is achieved by circulating the air or water repeatedly. This ensures multiple passes so that the UV is effective against the highest number of microorganisms and will irradiate resistant microorganisms more than once to break them down.

The effectiveness of this form of disinfection depends on line-of-sight exposure of the microorganisms to the UV light. Environments where design creates obstacles that block the UV light are not as effective. In such an environment, the effectiveness is then reliant on the placement of the UVGI system so that line of sight is optimum for disinfection.

Dust and films coating the bulb lower UV output. Therefore, bulbs require periodic cleaning and replacement to ensure effectiveness. The lifetime of germicidal UV bulbs varies depending on design. Also, the material that the bulb is made of can absorb some of the germicidal rays.

Lamp cooling under airflow can also lower UV output; thus, care should be taken to shield lamps from direct airflow, or to add additional lamps to compensate for the cooling effect.

Learn  more:

Ultraviolet germicidal irradiation
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

 

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