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Qiang Yizong; Wang Chongdao; Shao Yuan; Sun Cunpu; Cong Jianbo; Wu Ke
China Nuclear Information Centre, Beijing (China)1998
China Nuclear Information Centre, Beijing (China)1998
AbstractAbstract
[en] Free radical induced by γ-irradiated DNA, as well as the radioprotection effect on the thymidine solution by chinonin, quercetin, tannic acid, sulfated polysaccharide, polysacchariopeptide and spiro-algae are investigated by using ESR with 5'-TMP as DNA model and t-NB as spin trapping agent. The results show that spin trapping ESR signal of γ-irradiated 5'-TMP molecule has the typical ESR spectrum. The existence of 5'-TMP free radical is also confirmed. The above mentioned chemicals have the effect of trapping free radical, especially chinonic, tannic acid and quercetin
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Source
Aug 1998; 7 p; SMC--0145; 12 refs., 2 figs., 6 tabs.
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Report
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AROMATICS, AZINES, BIOLOGICAL EFFECTS, BIOLOGICAL RADIATION EFFECTS, CARBOHYDRATES, CARBOXYLIC ACIDS, DISEASES, DRUGS, ELECTROMAGNETIC RADIATION, FLAVENOIDS, FLAVONES, HETEROCYCLIC COMPOUNDS, HYDROXY COMPOUNDS, INJURIES, IONIZING RADIATIONS, MAGNETIC RESONANCE, NUCLEIC ACIDS, NUCLEOSIDES, NUCLEOTIDES, ORGANIC ACIDS, ORGANIC COMPOUNDS, ORGANIC NITROGEN COMPOUNDS, ORGANIC OXYGEN COMPOUNDS, PHENOLS, PLANTS, POLYPHENOLS, PYRANS, PYRIMIDINES, RADIATION EFFECTS, RADIATIONS, RESONANCE, RESPONSE MODIFYING FACTORS, RIBOSIDES, SACCHARIDES
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