ESR studies on the direct photolysis of aliphatic dipeptides. [uv radiation]
Journal Article
·
· Radiat. Res.; (United States)
The direct photolysis of aqueous solutions of aliphatic dipeptides leads to the formation of different types of radicals. Depending on the temperature range the most characteristic ones are the methyl radical CH/sub 3/, the formyl radical CHO, the imino radical NCH/sub 2/, and a radical (NH/sub 2/)CHR--CONH--CR--COOH formed by hydrogen atom abstraction. The possible mechanisms of the formation of the radicals are discussed. It is suggested that in dipeptides bonds are broken in various parts of the molecules as a consequence of direct photolysis. In particular, the peptide bond seems to be ruptured.
- Research Organization:
- Justus-Leibig-Universitat, Giessen, Ger.
- OSTI ID:
- 5340269
- Journal Information:
- Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 72:1; ISSN RAREA
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:7332440
Related Subjects
560111* -- Radiation Effects on Biochemicals-- In Vitro-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AQUEOUS SOLUTIONS
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
KINETICS
MAGNETIC RESONANCE
MIXTURES
ORGANIC COMPOUNDS
PEPTIDES
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PROTEINS
RADIATION EFFECTS
RADIATIONS
RADICALS
REACTION KINETICS
RESONANCE
SOLUTIONS
ULTRAVIOLET RADIATION
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AQUEOUS SOLUTIONS
BIOCHEMICAL REACTION KINETICS
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
KINETICS
MAGNETIC RESONANCE
MIXTURES
ORGANIC COMPOUNDS
PEPTIDES
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PROTEINS
RADIATION EFFECTS
RADIATIONS
RADICALS
REACTION KINETICS
RESONANCE
SOLUTIONS
ULTRAVIOLET RADIATION