Two‐Quantum Photoprocesses in DNA and RNA Biopolymers UnderPowerful Picosecond Laser UV Irradiation | Zendy

David N. Nikogosyan | Zendy; Gagik G. Gurzadyan | Zendy

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Two‐Quantum Photoprocesses in DNA and RNA Biopolymers UnderPowerful Picosecond Laser UV Irradiation

Author(s) -

David N. Nikogosyan,

Gagik G. Gurzadyan

Publication year - 1984

Publication title -

laser chemistry

Language(s) - English

Resource type - Journals

eISSN - 1026-8014

pISSN - 0278-6273

DOI - 10.1155/lc.4.297

Subject(s) - chemistry , irradiation , nucleic acid , photochemistry , dna , quantum yield , picosecond , rna , laser , saturation (graph theory) , biochemistry , optics , physics , nuclear physics , mathematics , combinatorics , fluorescence , gene

Two-quantum photoreactions taking place under picosecond laser UV irradiation ofDNA and RNA biopolymers were investigated. Despite of qualitative difference intwo-step photoprocesses concerned (single-strand breaks formation in plasmid pBR322 DNA, induction of breaks in TMV RNA sugar-phosphate chain, cross-linksformation in DNA of C D phage) similar dependences of the quantum yield of theeffects studied on the irradiation intensity can be observed with saturation in the regionof 3 · 10 11 −3 · 10 12 W/m 2 . The saturation intensity is one or two orders lower than inthe case of irradiation of single monomers - nucleic acid bases.

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