Mechanisms of the effect of VUV radiation on the microfungi

Galina Zvereva; Irina Kirtsideli; Eduard Machs; Albert Vangonen

doi:10.1117/12.2303532

16 April 2018 Mechanisms of the effect of VUV radiation on the microfungi

Galina Zvereva, Irina Kirtsideli, Eduard Machs, Albert Vangonen

Proceedings Volume 10614, International Conference on Atomic and Molecular Pulsed Lasers XIII; 106141S (2018) https://doi.org/10.1117/12.2303532
Event: XIII International Conference on Atomic and Molecular Pulsed Lasers, 2017, Tomsk, Russia

Abstract

The mechanisms of the effect of vacuum ultraviolet (VUV) radiation (λ = 172 nm) on various types of microfungi spores were investigated. It is found that there are several parallel direct and indirect mechanisms, which lead to spores inactivation, including destruction of the cell wall and DNA by means of direct absorption of VUV radiation and by VUV photolysis reactive products. IR transmission spectra indicate the etching of the spore cell wall material with the predominant degradation of the polysaccharides. Electrophoresis of irradiated spores DNA shows heavy (about 20 000 pairs of nucleotides) and light fragments appearance. Experiments using an antioxidant (iodine) indicate the participation of reactive radicals in inactivation, which provide not less than 10% of inactivated cells

Citation Download Citation

Galina Zvereva, Irina Kirtsideli, Eduard Machs, and Albert Vangonen "Mechanisms of the effect of VUV radiation on the microfungi ", Proc. SPIE 10614, International Conference on Atomic and Molecular Pulsed Lasers XIII, 106141S (16 April 2018); https://doi.org/10.1117/12.2303532

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