X-ray absorption near-edge structure (XANES) spectral changes of 2-deoxy-D-ribose by irradiation within the energy region around the oxygen K-shell absorption edge.
The physicochemical characteristics of 2-deoxy-D-ribose moieties in DNA strands are important to understand biological radiation stress. So, the X-ray absorption near edge structure (XANES) of 2-deoxy-D-ribose within the energy region around the oxygen K-shell absorption edge was measured. 2-deoxy-D-ribose was exposed to 3 energies of X-rays, i.e., 526.3 eV (below O 1s-->pi*), 537.8 eV (at the absorption peak of O 1s-->sigma*) and 552.6 eV (above O 1s-->sigma*) for given periods. Slight differences in spectral changes were seen in the each irradiation energy, suggesting in fact that the chemical state and following rearranged chemical structure of 2-deoxy-D-ribose may be different between the 3 irradiation energies.
Akamatsu
K
K
SPring-8, Japan Atomic Energy Research Institute, Hyogo, Japan. kakamatu@spring8.or.jp
Yokoya
A
A
D004247:DNA / Q000737:chemistry / Q000528:radiation effects; D004249:DNA Damage; D003855:Deoxyribose / Q000737:chemistry* / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D013052:Spectrometry, X-Ray Emission / Q000379:methods
D003855:Deoxyribose; D004247:DNA