Photodynamic inactivation utilizes photosensitiser (PS) molecules that when activated by light, produce reactive oxygen species that can rapidly oxidize multiple cellular targets resulting in nearly instantaneous pathogen cell death.

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Advantages of photodynamic treatment are: (1) Non-toxic and does not leave harmful residues; (2) No known microbial resistance; (3) Effective against a broad range of microorganisms; (4) Environmentally friendly; (5) Can be integrated into existing food processing systems; (6) Does not alter the taste or nutritional value of food.

Photodynamic treatment can be applied in AgroFood: Water & wastewater decontamination; Aquatic products; Insect pest control; Seeds & grains; Packaging; Juices; Fresh & freshcut fruits and vegetables; Meat and poutry (Maral S. et al.,, 2024).

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Fingure 1. Photodynamic Applications (Source: Maral S. et al.,, 2024)

Dr. Vu Thi Kim OanhFaculty of Food Science and Technology, VNUA