# Advancement study in skin bacteria protection using UV light

## TL;DR

This study evaluates the effectiveness of 254 nm UVC radiation in inactivating skin bacteria through mathematical modeling and experiments, showing it can kill bacteria effectively without harming human skin.

## Contribution

It introduces a combined numerical and experimental approach to assess UVC's efficacy in skin bacteria deactivation, demonstrating high kill rates and safety.

## Key findings

- 97.43% bacteria killed in experiments
- Numerical models align with experimental results
- UVC effectively deactivates skin bacteria without skin damage

## Abstract

UVC radiation has been recently used to disinfect hospital, daycare and public places. It can be used to reduce bacteria by deactivating their DNA. Our work is to examine the effectiveness of UVC radiation (254 nm) in inactivating the SkinBorn bacteria. Mathematical models of these microorganisms placed in different positions on a human skin have been developed and solved numerically. Heat transfer equation is linked to Lambert Beer relationship by taking into account the conduction, the convection and the radiation phenomena. The experimental set-up is realized in order to verify our purposes. Swabs from skin and under nails of different individuals were inoculated on nutrient agar plates. Our experimental results achieved 97.43% of microorganisms killing. Both experimental and numerical results demonstrate that secured using of UVC is extremely effective in killing bacteria without damaging the human skin.

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Source: https://tomesphere.com/paper/1907.05675