最新刊期
      期 3 ， 1997
      • Li Xifeng,Cai Zhongli
        Vol. 15, Issue 3, Pages: 129-133(1997)
        摘要：This paper summarizes the research achievements on the following aspects: detection and identification of low molecular radiolysis products of food packaging polymers and degradation products of plastic additives,influences of irradiation atmosphere,dose,dose rate, additives and food simulants on the formation of products, and effects of irradiation on global and specific migration of packaging materials. Some items are suggested to be further studied.  
        关键词：Irradiation;Food Packaging plastics;Radiation degradation;Migration;Additive   
        2
        |
        0
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371674 false
        发布时间：2023-04-23
      • Yao Zhanhai,Yang Huili,Xu Jun
        Vol. 15, Issue 3, Pages: 134-138(1997)
        摘要：Polypropylene amidoxime chelate fiber was synthesized by preirradiation graft copolymerization and amidoximation. The influence factors of grafting rate,content of amidoxime group and adsorption capacity have been studied. The results of experiment showed that grafting rate increased with the increase of preirradiation dose,grafting reaction time,monomer concentration and grafting reaction temperature. The highest content of amidoxime group is obtained at pH=7 of hydroxylamine solution. The adsorption capacity for gold is 0.51 mmol/g dry fiber.  
        关键词：Amidoxime chelate fiber;γ-irradiation;Grafting;Adsorption;Metal ions;Polypropylene   
        3
        |
        0
        |
        8
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371675 false
        发布时间：2023-04-23
      • Zhang Hongyu,Wang Fuyuan,Li Ming,Yan Dayu,Zhang Zhiyi
        Vol. 15, Issue 3, Pages: 139-142(1997)
        摘要：In this paper,MNDO method is employed to calculate bond lengths, electron distribution and coefficients of HOMO and LUMO,etc. of chinonin. Themolecular structural foundation of its scavenging ability on free radicals is eluciated theoretically, and theoretical basis is provided to understand its pharmacological mechanism and to modify its structure.  
        关键词：Chinonin;MNDO calculation;Antioxidant   
        2
        |
        0
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371677 false
        发布时间：2023-04-23
      • Chu Gaosheng,Yao Side,Zhang Zhicheng,Zhang Manwei,Wang Wenfeng,Chen Jiafu
        Vol. 15, Issue 3, Pages: 143-148,133(1997)
        摘要：In this paper, the intermolecular electrontransfer (ET) involving N-phosphoryl methione (NDM) and tryptophan (TrpH) initiated by Br2·- and Cl2·- anion radicals in aqueous solutions have been studied using pulse radiolysis and kinetic spectrophotometric monitoring techniques, a series of rate constants of ET have been determined and the influence of N-phosphoryl group on the mechanism of ET has been explained structurally.  
        关键词：N-phosphoryl methionine;Tryptophan;Electron transfer;Pulse radiolysis   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371731 false
        发布时间：2023-04-23
      • Zhao Hongxia,Zhang Hongyu,Zhang Zhiyi,Li Meifen
        Vol. 15, Issue 3, Pages: 149-154(1997)
        摘要：Characteristics of photosensitization and dark reaction of hypericin (HYP) are studied in DMSO homogeneous system. Rate constant ratio of HYP of generating O21 to O2·- isdetermined as 0.057 and rate constant ratio of generating O21 to anionradical of HYP (HYP·-) is determined as 1.25. It is also found that in existence of cysteine,HYP produce O2·- through thermochemica reaction,but the amount of is lower than that produced by HA. In TX-100 micellarheterogeneous system,amounts of produced 1O2 and •OH through photosensitization of HYP and HA are compared and it is found that the amount of generated 1O2 is similar to each other,but amount of produced OH of HYP is higher than that of HA.  
        关键词：Hypericin;Hypopcrellin A;Active oxygen free radical;Spin trapping;ESR;Photosensitization;Dark reaction   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371676 false
        发布时间：2023-04-23
      • Xiang Zhengyu,Wan Dairong
        Vol. 15, Issue 3, Pages: 155-158(1997)
        摘要：The radiation-induced graft copolymeriaztion of Methacrylamide onto silk fabric has been studied using electron beam and γ-irradiation. The processing monomer infusion conditions and radiation processing were studied in order to improve the proprerties of natural silk fabric.  
        关键词：Silk fabric;Radiation graft;Methacrylamide   
        2
        |
        0
        |
        7
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371719 false
        发布时间：2023-04-23
      • Li Qun,Gu Ruiqi
        Vol. 15, Issue 3, Pages: 159-163(1997)
        摘要：Wheat seedlings of 48h after germination were irradiated with various dosage of X-rays. High dosage X-irradiation, 8 Gy and 14 Gy can inhibited the growth,decrease the freshness weight of wheat seedlings. The height and weight of wheat seedlings decreased with the development of X-irradiation of dosage The concentration of protein and activity of some antioxidases include ascorbic acid peroxidase (ASA-POD),glutathione peroxidase (GSH-Px) and glutathione transferase (GSH-Ts) were observed on 2nd and 4th day after irradiation The concentration of protein in wheat seedlings decreases with the development of X-irradiation of dosage. The concentration of protein on 4th day was higher than that on 2nd day showed that the damage of wheat seedlings induced by X-irradiation was resumed during the culture process. X-irradiation can increase activity of ASA-POD, GSH-Px and GSH-Ts of wheat seedlings,and the increase rate of 14Gy X-irradiation was higher than that of 8Gy. The activity of ASA-POD and GSH-Px increased during the culture process and the activity of GSH-Ts decreased. That's show that wheat seedlings can increase the activity of antioxidases to resist the damage induced by high dosage X-irradiation. The results of low dosage X-irradiation,2Gy is similar as the control.  
        关键词：X-irradiation;Antioxidase;Growth;Wheat seedling   
        2
        |
        0
        |
        6
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371728 false
        发布时间：2023-04-23
      • Zhou Jianyi,Ji Huajun,Jin Yizun,Tu Tiecheng,Dong Jirong,Lin Nianyun
        Vol. 15, Issue 3, Pages: 164-167(1997)
        摘要：In order to search for more effective radiosensitizers,four new compounds were synthesized. In this paper,reports the radiosensitizing effect of four new synthesized compounds at the molecular level using ESR. The results of ESR show that the SER (Sensitizing Enhancement Ratio) of SMD which is 5.12 is greater than those of the other compounds. It has strong radiosensitizing effect on thymine with molar ratio of thymine to SMD 40: 1.  
        关键词：Radiosensitizer;ESR;Thymine   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371775 false
        发布时间：2023-04-23
      • Zheng Xiulong,Cai Jianming
        Vol. 15, Issue 3, Pages: 168-170,174(1997)
        摘要：The difference of DNA pol βactivity between hepatoma and hepatocytes was used to observe no obvious influence on their activity after γ-irradiation. The pol βactivity of hepatoma was still greater than normal hepatocytes It showed that the repair synthesis ability to the iradiated DNA damage in hepatoma was greater than normal. It was found that the molecular mechanism of pol βwas that higher pol βactivity in hepatoma was due to its gene over expression and higher transcription (mRNA) level by immunocytochemistry and cytoplasmic dot hybridization investigation.  
        关键词：pol β;DNA repair;Gene expression;mRNA   
        2
        |
        0
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371741 false
        发布时间：2023-04-23
      • Zhou Guangming,Chen Weiqiang,Li Wenjian,Xie Hongmei,Dang Bingrong,Li Qiang,Han Guangwu,Huang Tao,Wei Zengquan,Gao Qingxiang,Yang Hanmin
        Vol. 15, Issue 3, Pages: 171-174(1997)
        摘要：The biological effects of SMMC-7721 irradiated by25MeV/u40 Ar14+ are studied. The following results are obtained: (1) Various chromosomal aberrations are induced and the micronucleus frequency is higher than that of corresponding control (2) The greater the dose is,the heavier the cells are damaged.(3) The repair system of cells is actived during fractionation irradiation and the efficiency of repair is enhanced responding to the irradiation times.  
        关键词：Argon ion;SMMC-7721;Micronucleus frequency;Biological radiation effects   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371840 false
        发布时间：2023-04-23
      • Song Shuqiang,Cheng Tianmin
        Vol. 15, Issue 3, Pages: 175-178(1997)
        摘要：Macrophages play an important role in wound healing. The effects of 6Gy whole body irradiation on wound macrophage function was studied by a rat dorsum incision in which polyvinyl alcohol sponges were implanted It was found that the phagocytic activity, the release of tumor necrosis factor and interleukin-1, the regulatory effect on wound fibroblast proliferation by wound macrophages, as well as the number of macrophages in wound,were significantly decreased on day 3,5,8 after wounding. The results indicated that the important mechanism of depression of wound healig after whole body irradiation is the decrease in number and impairment of function of wound macrophages in the early stage of wound healing.  
        关键词：Irradiation;Wound healing;Macrophages   
        2
        |
        0
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371795 false
        发布时间：2023-04-23
      • Zhang Ying,Liu Shuzheng
        Vol. 15, Issue 3, Pages: 179-182,178(1997)
        摘要：It is well known that whole body irradiation (WBI) with low dose X-rays could improve the function of the immunological system and the antitumor efficacy of local large dose irradiation. In order to study the adjuvant effect of WBI with low dose on the tumor suppressive effect of chemotherapy, 6 hours before mitomycin C or cyclophosphamide I P administration,WBI with 75 mGy was given to C57BL/6 mice bearing Lewis Lung carcinoma It was found that WBI with 75 mGy X-rays could markedly enhance the suppressive effect of chemotherapy on tumor and significantly increase some immunological parameters related to tumor killing. The results suggested that WBI with 75 mGy X-rays could reduce the immunological damage of tumor-bearing mice caused by chemotherapy and enhance the antitumor efficacy ofcytotoxic agents.  
        关键词：Low dose radiation;Antitumor effect;Lewis lungcarcinoma;Chemotherapy   
        2
        |
        0
        |
        6
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371794 false
        发布时间：2023-04-23
      • Ju Guizhi,Fan Bin,Su Xu,Liu Jianxiang,Fu Shibo,Liu Shuzheng
        Vol. 15, Issue 3, Pages: 183-185(1997)
        摘要：In the present paper, the effect of low dose X-rays on the induction of apoptosis and cell cycle against challenge dose was studied in EL-4 cell line with FCM It was demonstrated that 0.075 Gy (with the dose rate of 0.0125 Gy/min) preirradiation with X-rays 6 h before 2 Gy exposure could reduce the percentage of apoptosis and G1 block induced by 2Gy (with the dose rate of 0.287 Gy). The results suggest that an adaptation of apoptosis and G1 block could be induced by low dose X-rays in EL-4 lymphoma cells.  
        关键词：Low dose X-rays;Adaptation;Apoptosis;G1 block   
        2
        |
        0
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371838 false
        发布时间：2023-04-23
      • Xu Hui,Yu Zhijie,Su Fuqiang,Jiang Dingwen,Shen Xianrong,Jia Fuxing
        Vol. 15, Issue 3, Pages: 186-188(1997)
        摘要：The polysaccharide from spirulinaplatensis (PSP) was further purified by sephadex G-100. PSP containedabout 77.63% of sugar The effect of PSP on immunological function of irradiated mice were studied. The results showed that PSP significantlyimproved organ weight,lymphocyte number and lymphocyte transformation in spleen of mice irradiated by 5 Gy.  
        关键词：γ-radiation;Polysaccharides of spirulina platensis;Lymphocyte transformation   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371831 false
        发布时间：2023-04-23
      • Jiang Jiagui,Yi Jian
        Vol. 15, Issue 3, Pages: 189-190(1997)
        摘要：In our experiment,it was observed that low dose irradiation with 0.01 Gy/d or 0.05 Gy/d could result in the mean augmentation of net weight of newborn mice,and the effect of the mean augmentationat 0.05 Gy/d was more obviously than that at 0.01 Gy/d.  
        关键词：Low dose irradiation;Growth rate;Hormesis   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371839 false
        发布时间：2023-04-23
      • Wang Xianli,Zhang Haiying,Jiang Jie,Cai Lu,Wang Anzhi
        Vol. 15, Issue 3, Pages: 191-192,F4(1997)
        摘要：In the paper,we studied effects of low doseionizing radiation 3~6 hours before high dose ionizing radiation on mouse The results showed that the CA of marrow cells and primary sperm cells were both higher than only high dosegroup (p<0.01). We preirradiated the male mouse with 0.05 Gy X-raybefore 2.0 Gy X-ray, and found that the rate of pregnancy was higher than only high dose group during 9 weeks (p<0.01). All of above show that low dose ionizing radiation could not only lower the break of hereditary material,but also increased the ability of reproduction of mouse treated by high doseradiation.  
        关键词：Low dose irradiation;Germ genetics;Germ cells;Adaptive response   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36371841 false
        发布时间：2023-04-23
      0