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  • 28 September 1998 Volume 7 Issue 3
      
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  • Dosimetric constants calculation of isotropic point source
    Ma Li, Li Shijun
    1998, 7(3): 129-130,133.
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    Γδ, X and Γδ, Ka values of over 800 kinds of nuclides, which could transmit photons, were re-calculated in this study based on their decay schemes, the quality-energy absorption coefficients of air to photons and the newest data of W value.Our results were obviously different from those calculated before at about 2% deviation.We also calculated Γδ, H*(peripheral dose equivalent ratio constant) and Γδ, H (directional dose equivalent ratioconstant), respectively, by using the conversion coefficients given in ICRU-47 report.
  • The effects on peripheral blood index and micronuclei rate of the cold-adaption and irradiation rats
    Song juzhong, et al
    1998, 7(3): 131-133.
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    Wistar rats were cold-adapted under the temperatures of -1~5℃ for 14 days before irradiated 4.5 Gy by 60Co γ rays.They were the cold irradiating group.The blood drained from their angular arteriae was tested for MN rates and 8 items of WBC, LYa、LYp、RBC, etc.The groups of room temperature, room temperatureir radiation and cold-adapation were controls.The rseules showed WBC, LYa, PLT and Hb of cold-adaption irradiation group declincd less and asecnded more rapidly than that of room temperature-irradiation group.The WBC counts in cold-irradiation group were as double times as that in room temperature group at the twenty-eighth day after irradiation, MN rate of the former was lower than that of the latter, The above prompted cold adapting rats increased resistance against irradiation and there would be the possibility to protection normal tissues by cold when patients were treated in radiotherapy.
  • Effects of mineral water with high radiation on The immunological funciong of mice
    Fu Rufang, et al
    1998, 7(3): 134-136.
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    66 Kunming mice were randomly divided into 3 groups, drinking tap water and two high radiation mineral water, respectively.At the end of 150 days, samples were collected for the detection of immunological function.The parameters used in observation included histopathological sections of the immunological organ, the number of HB and WBC, the phagocytotic function of pertoneal macrophage and the primary humoral immune response to SRBC.The results showed that only the number of HB has significant difference compared with the control group.