最新刊期
      期 1 ， 1984
      • Liu Renzhong,Lin Nianyun,Ni Minghua
        Vol. 2, Issue 1, Pages: 1-5(1984)
        摘要：Theoretical spindensity distributions and theoretical coupling constants of th-y mine ionic radicals and hydrogen abstruction radicals have been calculated at INDO level. The atomic coordinates of their conformations were obtained from a "mixed geometrical model". In the case of thymine anion radical and the hydrogen abstruction derived radical from the methyl grop of thymine, the theoretical coupling constats agree with the experimental data very well. In the case of the thymine cation radical and the hydrogen abstraction radical resulting form N1 of thymine, the calculated results agree with calculated values given by other authors and agree approximately with the experimental data.  
        关键词：Hydrogen abstruction radical of thymine;Anion radical of thymine;Cation radical of thymine;Thymine radical;MO-INDO calculations of thymine radical   
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        发布时间：2023-04-23
      • Li Wenke,Rong Yong,Jiang Yonglu,Gao Faben,Liu Defang
        Vol. 2, Issue 1, Pages: 6-10(1984)
        摘要：γ-ray induced polymerization of acrylamide has been carried out in the presence of disodium EDTA it was found, that disodium EDTA can cover the harmful ions in the system such as copper iron etc. increase molecular weight and improviets solubility in water. The effects of dose rate, total dose and polymerization temperature etc. on the polymerization were also studied. In this paper, the water-soluble polyacrylamide with high molecular weight was prepared, and the experiment result has provided a scientific basis for pilot process and industrial production.  
        关键词：Polyacrylamide;Radiation induced polymerization;Acrylamide;EDTA disodium   
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        发布时间：2023-04-23
      • Li min,Wang Gaodong
        Vol. 2, Issue 1, Pages: 11-16(1984)
        摘要：The radiation protection and radiation sensitization effects on thymine by tryptophan and tyrosine were investigated by means of U. V. spectrophotometry and CNDO ½ calculation. The mechanisms of action mentioned above are due to scavenging radicals in the irradiated water in the system of aqueous solution at roon temperature. However. In the system of frozen aqueous solution, predominately due to the charge transfer and excitation transfer.  
        关键词：Thymine;Tryptophan;Tyrosine;Radiation protection;Radiation sensitization   
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        发布时间：2023-04-23
      • Chen Wenxiu,Lu Xiangdi,Lü Gongxu,Zhang Lianshui,Jia Haishun,Wang Binglin,Wang Peide,Liu Andong,Gu Yongbao,Lin Tienian,Yan Zhen,Chen Zhongqiu
        Vol. 2, Issue 1, Pages: 17-21(1984)
        摘要：In this paper the radiation induced crosslinking and technological process of polyethylene foaming sheets were described in detail, the accelerator and materials both made in china were adopted and the main properties of polyethylene foaming produts in batch process by our method are given.  
        关键词：Polyethylene foam;Radiation crosslinking   
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        发布时间：2023-04-23
      • Zheng Rongliang,Liu Lisheng
        Vol. 2, Issue 1, Pages: 22-26(1984)
        摘要：ABSTRACT Before or after 226Ra irradiation with LD 50/30, mice were administrated with alcoholic soluble portion of Schizandra Chinensis Baill. In therapeutic group, survival increases to 80% and average survival time of died mice increases from 10.5 to 15 days. In prophylactic group, survival increases to 68.4% only. The activity of nervous system of irradiated mice is normalized by this portion.Whether therapeutic or prophylactic group of whole body irradiation of mice with 60Co in 1070 rad, the antioxidation activities of liver and brain are increased by Schizandra Chinensis Baill extracted in boiling water. The antioxidation activities in therapeutic group are higher than that in prophylactic group.The rough purified material of Schizandrin and pure γ-Schizandrin are able to increase the antioxidation activities of liver and brain to against ahe lipid peroxidation.  
        关键词：Radiadtion protection effect;Schizandra Chinensis Baill;H-Transfer mechanism;Excitation transfer   
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        发布时间：2023-04-23
      • Du Cong,Li Zunling,Lu Wei,Ma Ruide
        Vol. 2, Issue 1, Pages: 27-31(1984)
        摘要：This paper mainly reports the γ-induced radiation grafting of diethylene glycol dimethacrylate (DEGDMA) and its mixture with β-hydroxyethyl methacrylate (HEMA) in ethanol/water (1:1W/W) systems onto silicon rubber by direct method.The results show that the grafting yield is increased with the radiation dose, and concentration of monomer and the concentration of transfer agent in systems.When the concentration of cu++ ions reached 0.075N, a maximum graftion yield was observed.At the same radiation dose, the degree of grafting decreased with the increase of dose rate. However, at the same dose rate, the grafting level increased with dose.The water content in grafts increased with the concentration of hydrophilic HEMA in the mixture of monomers.It is advantageous to increase the grafting level in ethanol/water (1:1 W/W) by increasing the concentration of hydrophobic DEGDMA.  
        关键词：Biomaterials;Radiation graft copolymers;Hydrogels   
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        发布时间：2023-04-23
      • Lin Haoxue,Jin Jiamei,Li Zhirong,Shang Ximei,Shi Jilan,Wen Jihui,Zhang Danfeng,Huang Quanguang,Cui Shuling,Xie Zhichun,Sun Aimin,Fang Qinglong
        Vol. 2, Issue 1, Pages: 32-40(1984)
        摘要：A wine (42°) was irradiated with 105R of 60Co γ-ray. The rats which were fed with the irradiated wine were divided into five groups:1. Natrual control group——fed with no wine2. Irradiated wine group:——fed with one dose of irradiated wine, 0.5ml every other day3. Non-irradiated wine group——fed with one dose of non-irradiated wine, 0.5 ml, every other day4. Irradiated wine group——fed with one dose of irradiated wine, 2 ml, every other day5. Non-irradiated wine group——fed with one dose of non-irradiated wine, 2 ml, every other dayHaving proceeded series of experiment concerning body weight, peripheral blood picture, hepatic functions, immuna functions, endocrine functions, viscera coefficent, etc. of the above five groups of rats, all the results of the experiment showed that in the group fed with larger dose of irradiated wine, the GPT positive rate was prominently lower than that of the non-irradiated group. This also showed that liver damage caused by the irradiated wine was decreased as compared with that of the non-irradiated wine. other indices of the irradiated and the non-irradiated wine showed no significant difference.Our experiment showed that the irradiated wine is acceptable and safty.  
        关键词：Irradiated wine;Biologic effect   
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        发布时间：2023-04-23
      • Jiang Tienan,Yang Jingying,Meng Shanshan,Li Zhiwang
        Vol. 2, Issue 1, Pages: 41-45(1984)
        摘要：The changes of ultrastructure in ascitic reticulocytic sarcoma cells (SRS) after γ-ray irradiation were studied with scanning and transmission electron microscopes. Various alterations at the cell surface membrane could be seen under the scanning electron microscope 3 hours after γ-ray irradiation with doses of 1000~5000 rad. Folds decreased in number and thinned. Villi also decreased but thickened with enlarged ends expanded as drumsticks. The surface membrane ulcerated and fell off after a 5000 rad irradiation. Obvious degeneration of mitochondrias, Golgi apparatuses, chromatin and nucleoli occured. All these revealed that the plasma membrane system of SRS changed significantly in the early period after γ-ray irradiation.  
        关键词：Ascitic reticulosarcoma;Cell membrane;Ultrastructure;Scanning electron microscope;Transmission electron microscope;60Co γ-ray Irradiation   
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        发布时间：2023-04-23
      • Wang Zhengming,Hou Zuhong
        Vol. 2, Issue 1, Pages: 46-50(1984)
        摘要：25MeV X -rays were used to induce the lymphocytic chromosome aberration in human blood in vitro. 4769 metaphase lymphocytes were analysed. It has been found that the chrcmosome aberraticn yields conform to different models. The dicentric, and dicentric plus centric ring gave the best fit to the quadratic function Y = bD + cD2. The RBE of 25MeV X-rays compared with 60Co γ rays is clcse to 0.83.  
        关键词：25MeV X-ray;Chromosome aberrations in human blood in vitrc;Dicentric;Centric ring;Acentric fragment;The quadratic function;A linear regression equation;The relative biological effectiveness(RBE)   
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        发布时间：2023-04-23
      • Xia Shouxuan,Xu Huiying,Zhang Yangpei,Huang Sumin,Fan Guocai
        Vol. 2, Issue 1, Pages: 51-55(1984)
        摘要：The membrane filtration method of Bradley and Kohn was improved and used to detect the double strand breaks of DNA in irradiated Chinese hamster ovary cells and mouse bone marrow cells. The percentage of DNA retained on the membrane was inversely proportional to the radiation dose. The method had good reproducibility and was more simple and more sensitive than the classic neutral sucrose gradient centrifugation method. By this method the rejoining of double strand breaks could also be observed in both types of cells. The results provided an additional evidence that the double strand breaks could be repaired in mammalian cells.  
        关键词：DNA damage;DNA repair;DNA double strand breaks;Membrane filtration method   
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        发布时间：2023-04-23
      • Liu Keliang,Su Liaoyuan,Xue Zhimou,Tao Mingsan,Ma Xiangrui,Wang Mingsuo,Wang Hongyun
        Vol. 2, Issue 1, Pages: 56-59(1984)
        摘要：By means of liquid culture and agar culture in vitro, the variety of ability of reproduction of human T and B lymphocytes induced by radiation has been studied comparatively. Human blood exposed to 60Co γ-rays in vitro was incubated respectively in Eagle's medium or agar medium. In one group of the experiment Con A was a mitogen for T lymphocytes. LPS and DS were added into the anather group of the experiments for reproducing of B lymphocytes. 14C-valine was incorprated into all samples of liquid cultures. The results from the comparative study showed that the ability of T lymphocytes declimed more significantly than B lymphocytes. Hence it may be suggested that T lymphocytes were more radiosensitive than B lymphocytes.  
        关键词：Concanavalin A (Con A);Lipopolysaccharide (Lps);T-Lymphocyte;B-Lymphocyte;Radiosensitivity   
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        发布时间：2023-04-23
      • Li Jingjun,Yang Pinqing,Wang Zhiqi,Sun Yufu,Guo Zhenju
        Vol. 2, Issue 1, Pages: 60-62(1984)
        摘要：This paper reports that the changes of the acentric fragments in chromosome aberration and the frequency of lymphocytes with micronuclei increased directly with the Radiation dose, and suggests the frequency of lmyphocyte with micronuclei can be used as the biological indicator of radiation dose.  
        关键词：60Co γ-Irradiation;Frequency of micronuclei;Chromosome aberration   
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        发布时间：2023-04-23
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