最新刊期
      期 3 ， 1992
      • Zhang Zhicheng,Hu Hangchun,Zhang Manwei
        Vol. 10, Issue 3, Pages: 129-134(1992)
        摘要：The effects of radiation dose rate concentration of emulsifier and monomer content on reaction rate of radiation induced 2-ethylhexyl acrylate (EHA) emulsion polymerization have been studied. Nonionic surfactants, polyoxyethylene alkylether peregolo 0 with HLB about 15 and polyoxyethylene nonylphenolether (emulsifier OP)with HLB 15, are used as the emulsifiers in this work. It has been found that the dependence of Rp on I (Rp∝In) is changed with the index n from 0.29 for M/W= 2/8 (monomer/water in volume) to 0.91 for 5/5, where[E] of peregolo 0 is 4%. It has also been found that Rp∞[E]0.58 for peregolo 0 and Rp∞[E]0.51 for emulsifier OP. In order to interpret the results sufficiently, both micellar nucleation and microdroplet nucleation have been taken into account for the emulsion polymerization of the present system irradiated without agitation, especially for the case with a higher M/W value the later may be the main nucleation process.  
        关键词：2-ethylhexyl acrylate (EHA);Radiation emulsion polymerization;Nucleation mechanism   
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        发布时间：2023-04-23
      • Jiang Tao,Zhou Xiangyan,Dong Jinchan,Wang Chunyan
        Vol. 10, Issue 3, Pages: 135-137(1992)
        摘要：The frequency of dominant lethal mutation (DLM) in the germ cells of male mice induced by HTO-irradiation was studied. HTO was injected to the male mice at the active concentration of 3.22—31.23×102 kBq/g. b. w. which emitted the accumulative doses of 0.073—0.710 Gy within the following 20 days. The results suggested that the frequencies of DLM and post implantation loss induced at spermatids increased with the increasing of the dose absorbed. Primary spermatocytes appeared to be more radiosensitive than spermatognia and spermatids when the germ cells were exposed at 0.494 Gy.  
        关键词：Tritiated Water;Germ cells of male mice;dominant lethal mutation;Radiosensitivity   
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        发布时间：2023-04-23
      • Hu Tianxi
        Vol. 10, Issue 3, Pages: 138-142(1992)
        摘要：The radioprotective effects of bacterial superoxide dismutase(b-SOD) on the mice irradiated by 8 Gy γ¬ray were investigated. The results showed that when b-SOD was injected before and after irradiation, the surviral fraction of mice is increased 50% and 30% respectively. The former treatment could increase the DNA sythesis of the myeloid cells and spleen's lymphocytes, decrease the LPO of tissue homogenates and the haemolysis of erythrocytes significantly. The mechanism that b-SOD can drop the radiation injury of the mice was discussed.  
        关键词：γ-radiation;Surviral fraction;Bacterial superoxide dismutase(b-SOD);Radioprotetcive effects   
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        发布时间：2023-04-23
      • Zhuo Dunwen,Zhong Guangxiang,Jin Xiaoyan
        Vol. 10, Issue 3, Pages: 143-146(1992)
        摘要：The mechanism and kinetics of the solid phase radiation graft copolymerization of N-methylolacrylamide (NMA) onto silk fabric have been studied, The results showed that the graft copolymerization may take place in the solid mixture fo silk fabric and NMA dried by air blast at 50℃. The graft copolymerization consists of two parts, i. e. radical and ionic polymerization. Under the conditions of the dose rate I≥2.524 kGy/h, NMA content [M]<17% and moisture [X]≤0.93% in the solid mixture, and at room temperature, the rate Rg of solid phase graft copolymerization may be described as following equation  
        关键词：Silk fabric;Radiation graft;N-methylolacrylamide   
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        发布时间：2023-04-23
      • Ma Yuguang,Yang Meiling,Shen Jiacong,Zheng Yingguang
        Vol. 10, Issue 3, Pages: 147-151(1992)
        摘要：In this article, the formation and translation of the free radicals on the polymer surface treated by plasmas were studied and observed by ESR measurement. The results show that C-C bond split was main reaction in the process of the polymer irradiated by plasma, by which a stable alkyl free radical was formed. When alkyl free radical contacted with air, they translate into peroxide radical instantaneously. The peroxide radical was not as stable as radical in vacuum, they can react each other to form some polar-groups on polymer surface. The interaction between the peroxide free radical and polymer chain was correlative not only to the structure of polymer but also to the molecular motion of the polymer chain. The nature of plasma treating polymer surface was that the peroxide radicals were led onto polymer surface.  
        关键词：Low temperature plasma;Polymer;Polyethylene;Surface treated;Free radical proceed   
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        发布时间：2023-04-23
      • Gong Shouliang,Li Xiuyi,Wei Jun,Liu Shuzheng
        Vol. 10, Issue 3, Pages: 152-155(1992)
        摘要：It has been demonstrated that neonatal administration of monosodium glutamine (MSG) results in clearly defined lesions of the hypothalamic arcuate nucleus. The present study showed that neuroendocrine function changed significantly in adulthood when boby rats were injected with MSG (4 mg/g BW, ip) 2 and 4 days after their birth. The serum LH, FSH, TSH and GH and serum and urine testosterone (TS)levels and pituitary cAMP content were lower in MSG treated rats than those of intact rats, but the serum PRL level increased significantly and the testicular cAMP content didn't change. Fourty eight hours after head irradiation with 10 Gy X-rays in the male rats treated with MSG, the serum LH, FSH, TSH and GH and serum and urine TS levels tended to decrease, while the serum PRL level tended to increase and the pituitary and testicular cAMP contents didn't change. The results suggest that the functional irregulation of neuroendocrine system in MSG treated rats with extensive lesions of hypothalamic arcuate nucleus were not so significant as those of intact rats in response to irradiation.  
        关键词：Arcuate nucleus;Monosodium glutamine (MSG);Neuroendocrine;X-ray;Head irradiation   
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        发布时间：2023-04-23
      • Min Maozhong,Qi Chengyun,Zhou Yinsheng
        Vol. 10, Issue 3, Pages: 156-159(1992)
        摘要：In this paper the effect of radiolysis product on high-level radioactive waste (HLW) container is experimentally studied. Groundwater near deep repository is splitted into hydrogen, oxygen and oxidizing compounds (e. g., H2O2)under the influence of ionizing radiation, called radiolysis. It is of particular concern because itproduces an oxidation environment and an outward-migration redox front around each HLW canister, within which several important radionuclides(e. g., U, Np and Tc) are much more soluble and are migrated far away. The Fh lue of watevar solutionwith FeSO4(0.13 mol/L) in present experiment added under the influence of radioationof 0, 20, 60, 180 and 500 kGy(from 357 mV to 414 mV). Oxidation corrosion of copper, aluminium, iron and stainless stell metal contained in water under radiation is 0.2—6.1 times stronger than that under no radiation.  
        关键词：Radiolysis;High-level radwaste (HLW);Geological disposal;Waste container;Corrosion   
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        发布时间：2023-04-23
      • Tian Shengli,Zhao Yong,Li Jianchao,Zhang Xiaoguang
        Vol. 10, Issue 3, Pages: 160-164(1992)
        摘要：The effect of PSG injection before X-irradiation on immunological functions was studied. The results showed that the counts of nucleated cell of the spleen, the ConA-induced proliferative reaction of splenocytes and the IL-2 production by sp- lenocytes in irradiated mice in PSG group were higher than those in irradiated mice in control group at a certain dose range of X-rays. This effect still existted in the 3 rd day after irradiation with 2.0 Gy X-rays. It was also showed that NK cell activity in PSG group was higher than that in control group. It might be related to the effect of antitumor of PSG.  
        关键词：Polysaccharides of Ginseng;Proliferative reaction of lymphocyte of spleen;IL-2;NK cell activity   
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        发布时间：2023-04-23
      • Bai Xiaobin,Zhang Yangpei,Jin Cuizhen,Wu Ying,Xu Huiying,Xia Shouxuan
        Vol. 10, Issue 3, Pages: 165-169(1992)
        摘要：Ataxia telangiectasia (AT) is an autosomal recessive genetic disease. It was proved that a SV 40-transformed AT cells line, AT 5 BIVA, from the skin fibroblasts of an AT patient, was hypersensitive to ionizing radiation as well as to bleomycin and was radioresistant to DNA synthesis inhibition. Chromosome analysis had shown all fourteen AT 5 BIVA cells analysed had one of the number 11 chromosomes lost or rearranged, enhancement of transcient radioresistance by DNA mediated gene transfer was found, either with HeLaS 3 genomic DNA or with its restrction endonuclease digested fragments. The reason for this pheonmenum was discussed.  
        关键词：AT cells;Radiosensivity;Gene transfer;Chromosome   
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        发布时间：2023-04-23
      • Zhao Bingxi,Chen Daoyong,Tian Minquan,Chen Kunsong,Hu Keliang,Zhu Qingren,Han Zhewen
        Vol. 10, Issue 3, Pages: 170-173,181(1992)
        摘要：ATSTRACT In this paper, the radical copolymerization of TBTM with MMA initiated by radiation in various solvents were studied and the reactivity ratios were also calculated. It is found that there is nearly linear relationship between dipolemoment of solvents and copolymerization activity of TBTM. The charging in the structuer of TBTM in different solvents, which bring steric hindrance to the copolymerization, was presented to explain these results.  
        关键词：Solvents effect;Radiation copolymerization;TBTM (tributyltin methacrylate);MMA(methyl methacrylate);Copolymerization activity   
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        发布时间：2023-04-23
      • Ge Jiaxin,Wang Minjun,Ma Ruide
        Vol. 10, Issue 3, Pages: 174-178,134(1992)
        摘要：In this paper, the kinetics of gel formation in polyurethane acrylate initiated by UV-radiation was investigated with the help of IR spectra, in which benzophenone/benzoin ethyl ether was a mixed photosensitizer. The reaction degrees of double-bonds changing at 1408 cm-1 of acrylates in IR were detected in the different UV exposure time. The relationship between reaction degree PC=C and radiation time was established as follows: PC=C=0.325 t0.135. After a critical geloint,p the reaction degrees of double-bonds existed: PC=C(gel)>PC=C>PC=C(sol) and besides therewas a distributional relation between gel and sol fractions in the whole processing.The critical gel point was obtained with the extrapolation method, and its experimental gel point and the theoretical modeling one were quite close to each other. The experimental curves of PC=C, PC=C(gel) and PC=C(sol)functions related to gel fractions were in fairly good agreement with their theoretical modeling ones in both shape and tendency.  
        关键词：Polyurethane acrylate;Kinetic research;Cured by UV-radiation;IRspectra;Double-bonds;Gel;Sol   
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        发布时间：2023-04-23
      • Xie Guoliang,Yao Yanyu,Hao Chunfong,Sun Fuju,Wang Lihong
        Vol. 10, Issue 3, Pages: 179-181(1992)
        摘要：The changes of thymocyte membrane fluidity in mice induced by low-dose 60Co γ irradiation from pyrene fluorescent probe were reported. The results showed that the fluidity was decreased with increase of irradiation dose (0.25—1.00 Gy). The relationship between the ratio of I1/I2 or I3/L2 and irradiation dose were significantlycorrelative. From 0.50 to 1.00 Gy both ratios were significantly different as compared with contorl. The results can be used as sensitive indexes for early radiation effects.  
        关键词：Low-dose ionizing radiation;Thymocyte;Fluidity of cell membrane;Fluorescent probe   
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        发布时间：2023-04-23
      • Wang Yufen,Cao Xiaolong,Liu Yaonan
        Vol. 10, Issue 3, Pages: 182-186(1992)
        摘要：The variation of trap densities in polyimide films with the irradiation dose are investigated by TSC, together with the study of the dielectric property. At 75℃ a TSC peak appears, and the peak position has no obvious relation with the irradiation dose. It is found that the trap densities at each energy depth varies homogeneously with the action of irradiation, and increases exponentially with the absorbed dose. At the same time the dielectric dissipation factor increases with the dose. However, an extraordinary change is seen at the dose of 5×106 Gy.  
        关键词：Irradiation;Thermally stimulated current;Trap;Polyimide   
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        发布时间：2023-04-23
      • Ji Kejian,Zhang Yinsheng
        Vol. 10, Issue 3, Pages: 187-189(1992)
        摘要：The changes of surface composition of bisphenol A polysulphone films induced by X ray in ultrahigh vacuum have been studied using X ray photoelectron spectroscopy (XPS). The results show: (1) The sulphone group is partially changed into sulphide. (2) The extent of sulphide formation is dependent on irradiation time. (3) The degree of X ray induced degradation is basically uniform at the same irradiation time within the sampling depth.  
        关键词：X ray photoelectron spectroscopy;Polysulphone;X-rayradiation;Degradation   
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        发布时间：2023-04-23
      • Wang Jide,Xu Fang
        Vol. 10, Issue 3, Pages: 190-192(1992)
        摘要：This paper introduces the study on effect of insecticide and sterilization of SAK by 60Co γ irradiation. The results declare that, the proper dose kill the to insect eggs on the serface of SAK is 3.5 kGy, the preserving period under ambient temperature is up to 7 months, the intactness rate is 100%, and the SAK can be safely stored through the summer. By the irradiation of 3.5 kGy, the sanitary quality of SAK can be notablely improved and the amount of microbes can decrease by at leat 99%. There are no remarkable changes of the main nutritious components of irradiated SAK.  
        关键词：Sweet apricot kernal (SAK);γ-irradiation;Insecticide;Sterilization   
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        发布时间：2023-04-23
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