Food Safety Under the Microscope in Laboratory Workshop

Food safety was the focus of a laboratory session led by current doctoral students and their supervisor, Dr TSANG Yiu Fai. The “Environmental Protection and Health” workshop, held on 15th January, provided practical experience in scientific experimentation on topics closely related to everyday life.

Around 30 participants took part in two experiments – the first involved microplastics. Students utilised microscopes and specialised software to measure impurities filtered from water samples. This enabled them to understand how microplastics are scientifically identified and gain insight into current issues of plastic pollution.

The second activity focused on bacterial detection. Using rapid testing kits (3M™ Clean-Trace™ Luminomete), students compared bacterial counts in mineral water, lemon tea, cola drinks, and milk before and after exposure to air. Results indicated a significant increase in bacterial levels after four hours of exposure, with the greatest growth observed in milk. The outcomes highlighted the influence of storage conditions on bacterial proliferation and underscored the importance of consuming milk products after opening. Students were also encouraged to investigate the presence of bacteria on everyday items such as mobile phones, hair, and glasses, thereby enhancing their scientific literacy in daily life.

This workshop not only equipped students with essential laboratory skills and a practical understanding of scientific inquiry but also promoted heightened awareness of environmental protection and healthy living.

Dr TSANG Yiu Fai, Associate Professor in the Department of Science and Environmental Studies, Assistant Dean of Graduate School, and Programme Director of the Master of Education