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Detection of a new type of ultraviolet light that kills airborne pathogens

In a new study, scientists report that a type of ultraviolet light called Far-UVC can dramatically change the way it fights the spread of germs that spread through the air in the indoor environment, RT reports.

The researchers say the technology reflects a new way of controlling the spread of “Kovit-19” compared to current control measures that involve significant changes in people’s behavior, such as closing, body space, wearing a mask or vaccinating.

Contrary to the challenges of these effective and often unpopular practices, scientists claim that installing remote-UVC lamps in indoor environments is as easy as replacing a light bulb and impressing the antimicrobial performance of the device. “Ultraviolet rays reduce the amount of active microorganisms in the indoor air to almost zero, making indoor air just as safe as outdoor air,” says David Brenner, a biophysicist at Columbia University Medical Center.

Although the disinfectant properties of ultraviolet C (UVC) rays have been known for decades, the potential of radiation to damage sunlight, skin cancer and people’s eyes has led to severe restrictions on its use, and UV rays are often restricted to sterilizing medical equipment.

Recently, however, research into low-wavelength UVA emitters (also known as krypton-chloride lamps or KrCl excimer lamps) suggests that this subgroup of the UV spectrum poses no protective risk to mice or human skin cells, while retaining the ability to kill airborne cells. Pathogens. However, current research is limited to the Far-UVC test in a small-scale laboratory.

To see if this technique would be equally effective in a standard-sized room, the scientists installed five Far-UVC lamps in a 4-to-3-meter controlled bioaerosol chamber and injected a stream of Staphylococcus aureus bacteria into the nucleus.

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“This facility is a hermetically sealed room the size of a hospital room for one person, where a wide range of building ventilation and equipment can be implemented to test the potential performance of approaches such as Far-UVC on a large scale system,” says Environment. Louis Fletcher, a microbiologist at the University of Leeds in the UK.

According to the panel, four-UVC lamps reduced the load to 98.4% in a matter of minutes and maintained a 92% ambient level in accordance with the guidelines of the International Commission for the Protection of Non-Ionizing Radiation (ICNIRP).

The ventilation volume in the test chamber was set up like a normal chamber in the eACH, but Far-UVC released 184 changes in the air, which the team says works better than any other approach to disinfecting occupied interiors.

Kenneth Wood, a physicist at St Andrews University in the UK, says: “Our experiments yielded amazing results, more than possible with ventilation alone.” Despite the obvious promise of technology, researchers acknowledge that there are problems in overcoming the potential use of Far-UVC in the real world – especially when ensuring that Far-UVC installations meet the right level of radiation exposure indoors.

If this balance is reached safely, the researchers say, we could see here the game-changing part of health technology.