最新刊期
      期 1 ， 1996
      • Zhang Ying,Xu Zhili,Tan Chunhong
        Vol. 14, Issue 1, Pages: 1-6(1996)
        摘要：A new type of antithrombogenic polymeric dialytic membrane with a hydrophilic-hydrophobic microphase structure was prepared by grafting acrylic acid and styrene into polyethylene films, using peroxidation preirradiation technique. Various ratios of monomers influencing on properties of the grafted films were examined. Experimental results showed that the grafted films have superior mechanic strength, and their antithrombogenicity and permeability were 30 and 10 times higher than that of the ungrafted films respectively on condition of the volume ratio 1:1 (styrene vs acrylic acid).  
        关键词：Antithrombogenicity;Preirradiation graft copolymerization;Polyethylene;Acrylic acid;Styrene   
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        发布时间：2023-04-23
      • Wu Zhichao,Zhang Manwei,Zhang Zhicheng,Chu Gaosheng
        Vol. 14, Issue 1, Pages: 7-12(1996)
        摘要：A new organic aerogel made by γ-ray radiation is reported. The influence of absorption dose, crosslinking temperature, acidity of the solution and ratios of (N-hydroxymethyl)acrylamide to resorcinol has been studied. SEM and BET experimental revealed that there are 10~100 nm particles and microhole in the structure of the aerogel.  
        关键词：Radiation;Aerogel;(N-hydroxymethyl)acrylamide;Resorcinol   
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        发布时间：2023-04-23
      • Teng Renrui,Zhou Caihui,Zhou Zhiming,Liu Zhenhao,Luo Chaohua,Shun Xiuhua,Yang Gengcheng,Jia Shaojin,Xie Bingpeng,Zhang Shuming,Sun Wei,Liang Tianqiang,Huang Hanqing,Wang Zhuo
        Vol. 14, Issue 1, Pages: 13-16(1996)
        摘要：Radiation processing technology of crosslinking polyethylene of insulation material has been investigated. This material can be used for power cable insulation. The properties of this cable comply with the requirements of IEC-502(1983).  
        关键词：Radiation crosslinking;Polyethylene;Property;Power cable   
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        发布时间：2023-04-23
      • Chen Lishu,Wang Lianyuan,Liu Xinhua
        Vol. 14, Issue 1, Pages: 17-23(1996)
        摘要：The project has based the definition and conception on the new Recommendations of the ICRP and ICRU. The theory and method of measuring the Directional Absord Dose by an extrapolation ionization chamber with parallel plane have been researched. The results experamentally measured and culculated theoretically of the directional absorbed dose D'(d, 0) for a nature uranium slab have been compared with several authors.  
        关键词：Directional absorbed dose;Operational quantities;Protection against external exposure;Extrapolation ionization chamber;Radiation quantities   
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        发布时间：2023-04-23
      • Li Naining,Zhou Yunsheng,Fang Bingbing,Shui Xiuji,Zhang Weidong,Liu Jian,Chen Zhonghai
        Vol. 14, Issue 1, Pages: 24-28(1996)
        摘要：The method for potentiometric estimation of megarad dose with the ceric-cerous dosimetry system has been discussed in this paper. The difference in electrochemical potential between irradiated and unirradiated solution was used for the measurement of absorbed dose instead of the complex spectrophotometric procedure. Results for the doses ranging from 10 to 20 kGy are presented that the data obtain from the potentiometry with single distilled water and container without special cleaning are agreement within 4.5% with that from the Fricke system. Since electrodes and a pH meter used in the method are very popular in a common chemical laboratory and dilution is not required on the ceric-cerous dosimeter solution, the potentiometry of the ceric-cerous system is very suitable for routine dose measurement on radiation processing.  
        关键词：Potentiometric estimation;Ceric-cerous system;Electrode;Concentration cell   
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        发布时间：2023-04-23
      • Peng Tao,Shong Juzhong,Xie Huaijiang,Kou Qinhe
        Vol. 14, Issue 1, Pages: 29-33(1996)
        摘要：Accurate measurement cobalt source irradiation position repeatablity, dose rate at irradiation field and the dose uniformity ratio of product in the boxes before commissioning of supplement 1.22 pBq 60Co γ-irradiation plant. Under the experiment conditions we made the ferrous sulphate dosimeter standardization, a good dose reappear compare with measurement of National Dose Reasearch Institute.  
        关键词：Ferrous sulphate dosimeter;Molar linear absorption coefficient;Dose rate measurement   
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        发布时间：2023-04-23
      • Li Baozhong,Zhang Lihua,Yu Jiayan
        Vol. 14, Issue 1, Pages: 34-37(1996)
        摘要：By adding heterogeneous nuclei to polyamide 1010, the microcry-stalline structure of polyamide 1010 was changed. With the help of WAXD, DSC and the determination of gel fraction, the damage to crystalline PA 1010 was studied. The results showed that the damage to the crystal of polyamide 1010 starts with the fold surface of lamellae; the more the amount of the fold surface of lamellae is, at the higher dose does the crystal of polymide 1010 begin to be damaged.  
        关键词：Polyamide 1010;Aggregate state;Radiation damage to the crystal;Heterogeneous nuclei   
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        发布时间：2023-04-23
      • Fu Junjie,Zhou Qichang,Wu Qing,Xiong Lidong
        Vol. 14, Issue 1, Pages: 38-42(1996)
        摘要：The l37Cs radiation set, whose radioactivity was 2.146×1015Bq, It was built in 1981 in Institute for Application of Atomic Energy, Zhejiang Academy of Agricultural Sciences. The 137Cs source was sealed in stainless steel tube filled in helium. The effective diameter of radioactive area is 5.2 cm and its length is 48 cm. The set has a good repeating for fixed location, the relative divation of dose rate is 0.39, and the dose even rate is superior to 1.02. The 137Cs radiation set was used to study plant breeding,irradiation of food, radiosterilization of medical product and drugs, and so on.  
        关键词：137Cs;Radiation set;Sterilization;Breeding   
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        发布时间：2023-04-23
      • Wang Binlin
        Vol. 14, Issue 1, Pages: 43-45(1996)
        摘要：The peculiarity, the investment and annual operating cost of the 3.7×1016Bq (1 MCi) cobalt-60 irradiation facility at Beijing Radiation Application Research Centre are described. Its economic benefits each year is analyzed according to several year operating practice. Some related questions on carrying out radiation processing are raised and discussed.  
        关键词：Irradiation facility;Economic benefit;Investment;Operating cost;Recovery period   
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        发布时间：2023-04-23
      • Wu Ke,Cong Jianbo,Sun Cunpu
        Vol. 14, Issue 1, Pages: 46-49(1996)
        摘要：Two kinds of artificial tooth materials (polymethyl-methylacrylate abbreviated as PMMA and Bayer polymer) were investigated by detecting the characteristics of 60Co γ-ray induced ESR signals. The results are as follows: Both of the two materials have a dose related signal which located at a g-factor range of 1.9942~2.0144. The signal intensity of PMMA had a linear response to irradiation dose (r=0.97) in range of 0~20 Gy. The linewidth also varied along with the dose increment. Bayer polymer had a positive relative dose response below 8 Gy. The response would get saturation at doses higher than 8 Gy. The lowest detectable dose threshold for both of the two materials were about 2 Gy. The fading speed of the signal might be about 40% for the first 24 hours after irradiation if stored at imitated human body temperature (37℃) and it would get relatively stable when the samples were stored at lower temperature(-25℃). In this case, the fading speed might decreased to about 25%~30% during the first week. The above results suggests that artificial tooth materials of PMMA and Bayer polymer can be used as applicative ESR dosimetry materials for nuclear accidental dose evaluation.  
        关键词：ESR;Artificial tooth;Accident dosimetry   
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        发布时间：2023-04-23
      • Xie Hongmei,Wei Zengquan,Li Wenjian,Li Qiang,Dang Bingrong,Han Guangwu,Zhang Jinlian,Hu Yue
        Vol. 14, Issue 1, Pages: 50-54(1996)
        摘要：The effects of medium energy N ion beam irradiation on the germination and the growth of different kinds of wheat seeds are discussed in this paper. According to the results of test in laboratory and the field, the germination and the seedling growth of wheat seeds with irradiation dose were evidently inhibited. Furthermore, there was a larger difference between implantation and penetration. In the course of the seed germination the inhibition resulting from the implantation was clearly stronger than that from the penetration. From survival curves of emergence rates of three different strains in the field, the half-lethal doses of implantation and penetration (D50) are in the range of (107~108) ions/cm2 and (108~109)ions/cm2 respectively.  
        关键词：Heavy ions;Wheat;Implantation;Penetration   
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        发布时间：2023-04-23
      • Wei Hulai,Zhao Huishun,Ma Lanfang
        Vol. 14, Issue 1, Pages: 55-58(1996)
        摘要：The Balb/C mice were whole body irradiated with γ-rays (60Co, 6.5 Gy), and given human fetal muscle conditioned medium (FMCM) before and after irradiation, the protective and promoting effects on hematopoiesis in irradiated mice were observed. The results showed that FMCM given I. P (2.5~5.0 ml kg-1 d-1×5 d) before 6.5 Gy whole body γ-irradiation was able to protect the colony forming unite-spleen (CFU-S), and reduce the decreases of red blood cells (RBC)white blood cells (WBC) and hemeglobin (Hb) in peripheral blood; FMCM given after irradiation could effectively promote the hemopoietic reconstruction in spleen and the increases of RBC, WBC and Hb in peripheral blood. The above results suggest that FMCM has good protective and promoting effects on reducing hematopoietic damage caused by irradiation.  
        关键词：Irradiation;Hematopoietic damage;Fetal muscle conditioned medium (FMCM);Radioprotection   
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        发布时间：2023-04-23
      • Yu Hongchen,Zhang Hongmei,Ling Ling,Yu Zhiqiang,Liu Ji
        Vol. 14, Issue 1, Pages: 59-62(1996)
        摘要：By using the technics of culture of immuno-stromal progenitors in vitro, we studied their radiosensitivities after irradiation in various doses. The values of D0 and n of thymus, spleen and lymph node were 2.3 Gy and 1.5, 2.8 Gy and 1.2, 2.7 Gy and 1.4 respectively. The radiosensitivity of the CFU-F subgroups which formed dense colonies was significantly higher than that of loose colonies, when cultured in vitro.  
        关键词：Radiosensitivity;Survial cells;Immuno organ;Immuno-stromal progenitors   
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        发布时间：2023-04-23
      • Jiang Jiagui,Yi Jian,Sun Guoqi
        Vol. 14, Issue 1, Pages: 63-64(1996)
        摘要：In this paper, the effects of 2 Gy 60Co γ-irradiation on the activity of superoxide dismutase (SOD), the contents of LPO in spleen of mice, as well as the effects on the activity of SOD and the releasing ability of in erythrocytes of mice, at 24th hour after irradiation, were reported.  
        关键词：Lipid peroxide (LPO);Superoxide dismutase (SOD);Radiation effects;Spleen   
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        发布时间：2023-04-23
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