最新刊期
      期 2 ， 1994
      • Huang Kun,Liu Hua,Ji Xuelin
        Vol. 12, Issue 2, Pages: 65-70(1994)
        摘要：Microwave irradiation has been used in organic liquid phase reactions to significantly reduce the reaction time and improve the yeild. In this article, the proposed mechanism, the development of techniques and reactions, such as Diels-Alder, ene, rearrangement reactions etc., are discussed.  
        关键词：Microwave irradiation;Organic compounds;Liquid phase reaction;Microwave heating equipments   
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        发布时间：2023-04-23
      • He Yongke,Wu Jilan,Ronald Cooper
        Vol. 12, Issue 2, Pages: 71-74(1994)
        摘要：A study was made on radiolysis of neutral (pH 6.9) and alkaline(pH 11) aqueous solutions of pentachlorophenol (PCP). The values of were determinated in aqueous solutions of PCP saturated with nitrogen, air or nitrous oxide. Some of radiolytic products (trichlorophenol, tetrachlorophenol, dihydroxy tetrachloropenpl) were identified by GC-MS. The mechanism of radiolysis was suggested.  
        关键词：Pentachlorophenol;Chlorion;Radiolysis   
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        发布时间：2023-04-23
      • Liu Weihong,Li Xiuyi,Liu Shuzheng
        Vol. 12, Issue 2, Pages: 75-78,108(1994)
        摘要：The changes of reactivities of thymocyte to IL-1 and splenocyte to IL-2 were studied in C 57 BL/6 mice after whole body X-irradiation with low doses. It was found that the number of thymocyte and splenocyte was increased, the reactivities of thymocyte to IL-1 and splenocyte to IL-2 also showed a tendency to increase after X-irradiation with low doses below 100 mGy, but the increase was statisticaly not significant. There was a same effect of low dese radiation on the CTLL-2, growing dependent on IL-2, irradiated in vitro.  
        关键词：Low dose radiation;Interleukin-1 (IL-1);Interleukin-2(IL-2);CTLL-2 cell   
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        发布时间：2023-04-23
      • Zhang Hongyuan,Wang Lanjin,Fan Zhengping,Cai ping,Wen Quanfa,Zhang Guibo
        Vol. 12, Issue 2, Pages: 79-86(1994)
        摘要：This paper reports a series of biological effects induced by chronic γ-irradiation combined with benzene injection in rabbits. 30 healthy male rabbits, 6-7 months of age, were equally divided into 6 groups 5 in each one. Animals of control and radiation, low benzene and low benzene radiation, high benzene and high benzene radiation groups were injected subscutaneousl with 0.6 ml peanut oil, 0.6 ml peanut oil 0.06 ml benzene or 0.6 ml peanut oil + 0.6 ml benzene/d/rabbit, respectively, 5 days per week for 14 weeks. After injection, animals of radiation, low benzeae radiation, high benzene radiation groups were irradiated at 0.899 mGy/min. × 60/d. The main results were summarized as follows: (1) The changes of hematopoietic function are close related to the injected dosage of benzene. Damages of hematoietic function in rabbits are enhanced by combined effect of benzene and γ-rays. (2) γ-rays and benzene can induce chromosome aberrations and SCEs. Chromosome aberrations in blood lymphocytes are higher than in marrow cells. Chromosome aberrations induced by γ-rays are higher than SCEs, but no significant linear correlation between the dosage and effects was found. The SCEs of blood lymphocytes induced by benzene are more obvious than chromosome aberrations, moreover, linear dose effect correlation of acentrics in high benzene group and SCE in high benzene and low benzene radiation grous were observed. The chromosome aberration yield induced by γ-rays can signifieantly be enhanced by treatment with benzene. The combined cytogenetic effects of radiation with benzene could be synergetic mainly in dicentrics plus rings,being mainly additive in acentrics. SCEs induced by benzene combined with γ-radiation could be enhanced in the low benzene radiation group. (3) Benzene is a weak mutagen for male reproductive cells, because it can induce more abnorml sperms. Histological damages of testes in rabbits were also enhanced by combined effect of γ-radiation and benzene.  
        关键词：γ-radiation;Benzene;Rabbit;Chromosome aberration;SCE;Hematogenic system;Reproductive system   
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        发布时间：2023-04-23
      • Chen Chuansong,Xu Jianren
        Vol. 12, Issue 2, Pages: 87-90(1994)
        摘要：The antibody secreting B lymphocyte hybridoma cells were irradiated with 60Co γ-rays. A markedly dose-related depression of total production of specific antibody was observed. However, production of specific antibody per clone was raised with increase of radiation dose. The increase in antibody secretion by B lymphocyte hybridoma cells was lost after long term culture and freezing of survival cells. γ-radiation could induce potentially lethal damage of monoclonal antibody secreting cells, but this damage didn't affect the antibody secreting function of those surviving cells. These results indicate that ionizing radiation stimulates the secreting function of B lymphocyte hybridoma cells in the initial period after exposure.  
        关键词：γ-radiation;Antibody secreting cell;Hybridoma;Radiation effect   
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        发布时间：2023-04-23
      • Tian Jun,Zhao Yonghong,Xu Jinfen,Zhou Zhaofu
        Vol. 12, Issue 2, Pages: 91-95(1994)
        摘要：The surface state and wettability to distilled water of PTFE were investigated with 60Co γ-ray irradiation. The effects of surface roughness, crystallinity and chemical groups on the wettability of irradiated PTFE were discussed by a series of analyses on the polymer surface, such as IR, X-ray diffraction, surface roughness and contact angle. The results of experiment indicated, that effects of chemical groups to the surface wettability of polymer on PTFE surface were more remarkable than that of surface roughness and crystallinity.  
        关键词：Polytetrafluoroethylene γ-irradiation;Wettability;Contact angle   
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        发布时间：2023-04-23
      • Zhou Yuankai,Liu Aiping,Zeng Guiying
        Vol. 12, Issue 2, Pages: 96-99(1994)
        摘要：The effect of a single post-irradiation intestinal lumen dilatation injection of one of mononucleotides, nucleosides or nucleic acid bases on intestinal crypt survival after 980 cGy abdominally γ-irradiated mice has been studied. The results showed that, any one of these nucleic acid components can produce the same enhancing effect of crypt survival as that did by polymerized calf thymus DNA. This fact suggests that, the radiorestorative effect of exogenous nucleic acids on the intestinal crypt cells depends not upon the action exerted by their highly polymerised state, but rather by their various enzymatic degradation products.  
        关键词：Ionizing radiation;Nucleic acid component;Intestinal crypt survival   
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        发布时间：2023-04-23
      • Yue Jiachang,Wang Tidun,Pang Suzhen,An Jingyi,Jiang Lijing
        Vol. 12, Issue 2, Pages: 100-104(1994)
        摘要：In this paper the cellular uptake of sulphonated hypocrellin(S-HB), as well as photodamage on cellular viability,lipid peroxidation and intrinsic fluorescence quenching of membrane protein was studied.It was found that S-HB suitable dissolved in aqueous solution, its cellular uptake is slower that HB. The photodamage on cellular viability both photosensitizers was close to each other, however the photosensitizers were different in physical and chemical properties. The HB photodamage target of cells was membrane, but the sulphonated HB photodamage target of cells may be part of organelles, besides the membrane. The experiments showed the sulphonated HB would be suggested as a potential advantage for photodynamic therapy of tumor in clinical application.  
        关键词：Sulphonated hypocrellin B;Photosensitization;Ascitic hepatoma cell   
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        发布时间：2023-04-23
      • Wang Chongying,Wang Rujuan,Yang Hanmin
        Vol. 12, Issue 2, Pages: 105-108(1994)
        摘要：Using the method of 3H-TdR incorporation, this paper studied the change of DNA synthesis during the early period of germination of wheat seeds irradiated by low energy N+ heavy ion. The results showed: 1) the low energy N+ heavy ion was also able to induced a unscheduled DNA synthesis (UDS) in seed embryos of wheat: 2) the peak of the UDS occurred at the 6 h after seeds soaking, being 4h earlier than the peak of the normal DNA synthesis of seed embryos: 3) the rate of UDS was roughly in positive proporation to irradiation doses: 4) the level of the normal DNA synthesis decreased with the increase of the UDS in the wheat seed embryos irradiated.  
        关键词：Nitrogen ion;Heavy ion;3H-TdR;DNA synthesis;Triticum   
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        发布时间：2023-04-23
      • Meng Xiangshun,Zhao Fang,Li Yu,Gao Jianguo,Zhu Qin,Zheng Xiulong
        Vol. 12, Issue 2, Pages: 109-112(1994)
        摘要：Lewis (lung cancer)-bearing C57BL/6 mice and EMT 6 (a mouse mammary carcinoma)-bearing BALB/c mice were fractionally irradiated (8 Gy Per time twice a week, total absorbed dose 64 Gy). In experimental groups radiotherapy protocol was combined with CMNa (0.1,1.0 mmol/kg) or metro nidazole (0.1 mmol/kg). The results showed that, comparing with the untreated tumor, the therapeutic efficacy was observed when tumor was treated with fractionated irradiation and the relative tumor volume was reduced. For EMT 6 tumor metronidazole had some radiosensitizing effect (Fig.2),relative tumor volume was more reduced comparing with radiation alone group, and for Lewis lung cancer there was no radiosensitizing effect was observed. When CMNa was combined, the radiosensitizing effect was obviously enhanced for both tumor models. At the same dosage (0.1 mmol/kg), the radiosensitization of CMNa was higher than that of metronidazole.  
        关键词：Radiosensitizer;Metronidazol amino acidum natricum;Fractionated irradiation;Metronidazole   
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        发布时间：2023-04-23
      • Guan Xiaosheng,Xie Xishun
        Vol. 12, Issue 2, Pages: 113-116(1994)
        摘要：The properties of polytrifluorochloroethylene foils are found to change, when they are irradiated by X-rays. Experiments shows that irradiation will affect the charge storage in the sample. A large dose of irradiation could bring about the change of melting temperature of the foil.  
        关键词：Polytrifluorochloroethylene;X-ray;Radiation effect;DSC analysis;Surface potential   
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        发布时间：2023-04-23
      • Qin Quanfa,Xu Liping
        Vol. 12, Issue 2, Pages: 117-118(1994)
        摘要：This paper reports the result of radiation sterilization and the change of enzyme activity of papainase under the action of γ-rays. when KI and vitamin C were added to the papainase, radiation strilized efficiency reached 100%, but enzyme activty reduced 15% at the dose of 8 kGY.  
        关键词：Papainase;Radiation sterilization;Enzyme activity   
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        发布时间：2023-04-23
      • Zhang Zhengguo,Yuan Shaoquan,Ha Hongfei
        Vol. 12, Issue 2, Pages: 119-123(1994)
        摘要：A kinetic study was made on the preirradiation grafting of styrene onto cotton cellulose. The dependencies of the grafting yield on preirradiation (in air) dose, grafting reaction time and grafting temperature were investigated respectively. The grafting yields as a function of above reaction conditions weree xpressed by derived using approximate formulae. The results about the relation between the grating yields with these grafting conditions calculated by the equations derived in this work were consistent with respective experimental data. It means that the experimental results are correct and the derived equations are reasonable.  
        关键词：Cotton cellulose;Styrene;Radicals;Preirradiation grafting;Energy of activity   
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        发布时间：2023-04-23
      • Li Xiuyi,Liu Hongyu,Lü Zhe,Zhang Yingchun,Liu Shuzheng
        Vol. 12, Issue 2, Pages: 124-126(1994)
        摘要：C 57 BL/6 mice were whole-body irradiated (WBI) with 75 mGy X-rays. The percentage of the mitotic thymocytes in the area of cortex, medulla as well as the boundary in thymus was significantly higher than that in the sham-irradiated control 3 to 7 days after irradiation. At the same time there were no significant differences in the percentage of pyknotic thymocytes in the areas mentioned above compared with the control. The present study on thymocyte morphology demonstrated further that low dose radiation may enhance the proliferative activity of thymocytes.  
        关键词：Thymocytes;Mitosis;Pyknosis;Low dose radiation   
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        发布时间：2023-04-23
      • Wang Jide,Ma Xiaoping
        Vol. 12, Issue 2, Pages: 127-128,126(1994)
        摘要：This paper describes the results of killing the larva of plodia interpunella in the fruit by 60Co γ-irradiation. The lowest effective dose for killing larva by irradiation is ca. 2000 Gy: the effective dose for immediately killing larva is 3000 Gy. The method is simple and easy and also suitable for the study of commercial irradiation of dry-fruit.  
        关键词：The larva of plodia interpunella;Radiation;Insecticidal action   
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        发布时间：2023-04-23
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