Assoc. Prof. Dr. Warakorn Limbut, a deputy director of TAB-CoE and a lecturer from the Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University, attended homage Her Royal Highness Princess Maha Chakri Sirindhorn in the opening ceremony of Thailand Research Expo 2021 during 22-26 November 2021 at Centara Grand and Bangkok Convention Centre at Central World, Bangkok. He also presented the Nano Spray HOCl cleaner V3, which was invented through collaboration with Master Labs Incorporation Co., Ltd to deal with COVID-19 pandemic.