VUV irradiation of microorganisms in the aquatic environment

G. N. Zvereva; I. Yu. Kirtsideli

doi:10.1117/12.3009311

2 November 2023 VUV irradiation of microorganisms in the aquatic environment

G. N. Zvereva, I. Yu. Kirtsideli

Proceedings Volume 12920, XVI International Conference on Pulsed Lasers and Laser Applications; 129200X (2023) https://doi.org/10.1117/12.3009311
Event: XVI International Conference on Pulsed Lasers and Laser Applications, 2023, Tomsk, Russian Federation

Abstract

Irradiation of microfungi Rhodotorula colostri by vacuum ultraviolet (VUV) radiation (λ=173 nm) in aquatic environment was studied. The results have shown, that the survival probability in the case of irradiation through a water layer (6 μ) increases up to 60% compared with the case without water layer. This increase can be explained by: 1) a decrease of intracellular water photolysis reactive products due to absorption of the short-wavelength part of the VUV spectrum by external water and 2) an insufficient of external water photolysis products to increase inactivation. This indicates a greater effectiveness of the impact on microorganisms of the reactive products of water decomposition from the inside than from the outside it. Since the short-wavelength wing is also absorbed when the water layer thickness is reduced to the minimum possible water layer thickness value d=1 μm, it can be recognized that the use of an external water layer for inactivation of spores by VUV radiation in the wavelength range λ=173 nm is ineffective.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

G. N. Zvereva and I. Yu. Kirtsideli "VUV irradiation of microorganisms in the aquatic environment", Proc. SPIE 12920, XVI International Conference on Pulsed Lasers and Laser Applications, 129200X (2 November 2023); https://doi.org/10.1117/12.3009311

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