It is reported that hospitals and laboratories often use ultraviolet light to kill bacteria. However, this method has one major drawback, namely, causing harm to humans. Therefore, ultraviolet light can only be sterilized in an unmanned operating room and an empty laboratory hood.
At present, researchers have found that shorter wavelengths of bactericidal UV light may not harm humans and, according to theory, develop it into a new tool that can be used in schools, crowded aircraft, food processing plants, and even operating rooms and laboratories. Use it in places to slow the spread of the disease.
Ultraviolet light sterilizes by destroying the molecular bonds that bind the genetic material of the bacteria to the protein. Among them, the most commonly used is light with a wavelength of 254 nm, which contains a shorter ultraviolet wavelength, so-called C, however, it can penetrate the skin and eyes, leading to diseases such as cancer and cataract.
To this end, physicist David Brenner from the Columbia University Medical Center in New York led a team to test far-short-wave ultraviolet light that could not penetrate the eye or the surface of the skin for the past four years. The results of the study showed that the far-short-wave ultraviolet light only killed the bacteria on the surface and did not harm the experimental mice.
In addition, the researchers reported in a preprinted study published on the biopreprint website bioRxiv on December 28, 2017 that Brenner and his colleagues conducted the next test to determine if far short UV could solve many public The main health problems in the workplace: floating bacteria.
First, the team atomized the flu virus in a test chamber and then irradiated the virus with short ultraviolet light at a wavelength of 222 nm. As a control, some were not exposed to short ultraviolet light. Thereafter, the researchers collected liquid samples from the test chamber and spread them in the kidney cells of dogs susceptible to influenza infection. The results showed that samples that were not irradiated with short ultraviolet light could infect cells and were irradiated with short ultraviolet light. The sample cannot.
Industrial hygienist Shawn Gibbs believes that if the study is successful, short-wave ultraviolet light will have a positive effect on disrupting disease transmission. It is understood that Shawn Gibbs studied the disinfection performance of short ultraviolet rays at the Indiana University School of Public Health in Bloomington.
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