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      • Weixin Ye
        Vol. 10, Issue 7, (1987)
        关键词：radioimmunoassay methodology;radionuclide label technique;separation technique;Quality control   
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        发布时间：2022-09-13
      • Hongxia Shou
        Vol. 10, Issue 7, (1987)
        摘要：Under the treatment with high energy radiation, plant cellulose materials undergo a series of changes in chemical and physical properties. This paper describes the chemical changes of water-soluble carbohydrate, easy-to-hydrolyse carbohydrate, hard-tc-hydrolyse carbohydrate, amino acid and protein in rice straw after irradiation with 60Co γ-ray. The content of water-soluble carbohydrate in rice straw can be increased significantly by such treatment. The combination treatment of irradiation and acid or alkali soaker can reduce the dose for the radiolytic cracking decomposition and produce a good effect.  
        关键词：plant cellulose material;radiolytic cracking decomposition;water-soluble carbohydrate;easy-to-hydrolyse carbohydrate;hard-to-hydrolyse carbohydrate;acid or/and alkali soaker   
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        发布时间：2022-09-13
      • Fuying He,Baogen Qian,Zhixiong Feng,Pei Li,Zongying Qin,Jiexian Lang,Yao Zhou,Laifeng Jin,Xueran Pang,Yaohua Chen,Lin Lu,Guiying Li
        Vol. 10, Issue 7, (1987)
        摘要：The radio-resistance tests for E. Coli, α-streptococcus, N-catanhalic, Candida albicans, Aspergillus rersico and Bacillus cureus spores by 60Co γ-ray under the different doses were reported. From the logarithmic survive curve of irradiation, it was shown that D-values for the above spores were 0.2, 0.4, 0.35, 0.5, 0.75 and 1.3 kGy respectively. When the concentrations of spores were 106—107 and absorbed dose was 7kGy, the efficiency of sterilization reached 99.9999%. The physical and chemical properties of PVC materials irradiated with 7-10kGy accorded with the pharmacopeia standard after the storage of 7 days to 8 months. The materials remained sterile and pyrogen-free after storage as long as 8 months.By the acute toxicity test and 220 cases of clinical test it was proved that this sterilization method was safe and reliable.  
        关键词：Polyvinyl chloride;device of transfusion and infusion;Radiation sterilization   
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        发布时间：2022-09-13
      • Liguo Cao
        Vol. 10, Issue 7, (1987)
        摘要：To avoid errors brought about by difference of material components between standard samples and unknown samples in relative determination and by inaccuracy of fundamental parameters in absolute determination, we have undergone experiments in measuring the general effect KI0 of fundamental paramenters under specific experimental conditions and united mass absorption coefficient (µo+µk) by using a few standard samples. In this way, the method of "quasi-absolute determinaticn" is achieved.The paper gives a detailed expoundation of the idea. It elucidates the methods of comprehensive sensitivity factor KI0 and united mass absorption coefficient (µO+µk) measurement and shows the results of its application in minerals, ore and other samples.  
        关键词：X-ray fluorescence analysis;Matrix effects;comprehensive sensitivity factor KI0;quasi-absolute determination   
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        发布时间：2022-09-13
      • Jingde Li,Daquan Xie,Shuying Chen,Jiming Wang,Lei Shi,Zuwu Lai
        Vol. 10, Issue 7, (1987)
        摘要：The method for measurement of depth profile of tritium implanted or absorbed in materials is described. The sensitivity of this technique may reach 0.1 at%. When the target is 4 mg/cm2, the depth resolution may reach 0.46 mg/cm2.  
        关键词：flight time method;pulsed proton beam;tritium target;depth profile   
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        发布时间：2022-09-13
      • Huijuan Lu,Yunlu Zhou
        Vol. 10, Issue 7, (1987)
        摘要：Gold and silver in geological standard samples MGI were determined by instrument neutron activation analysis. The various interferences of nuclides were considered. Corrected factors of the geometry in different positions have been determined. Using the geological standard sample MGM and radiochemical separation neutron activation method as reference, the reliability of this method is proved. Gold content in samples is 0.4—0.009 g/t, silver content is 9—0.3 g/t. Standard deviation is less than 3.5%, the precision of the measurement is 4.8—11.6%.  
        关键词：instrument neutron activation analysis;geological standard sample   
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        发布时间：2022-09-13
      • Xizhang Feng
        Vol. 10, Issue 7, (1987)
        摘要：In the present paper, a new expression for neutron activation R-matrix elements was given. Use 175Yb (i or j)—169Yb (j or i),153Gd (i or j)-159Gd (j or i), 103Ru (i or j)—97Ru (j or i), or 95Zr (i or j)-97Zr (j or i)as neutron energy spectrum monitor, j as standard, and Rij as neutron spectrum indicator. Define relative deviation from thermalization: x= (Rij-1)/ (Qoi-Qoj)《1, where Qoi and Qoj are the ratios of infinitely dilute resonance integral and thermal neutron capture cross section of i and j respectively. Then, Rij=1+ x, , where k represents nuclides other than i and j • Rkj series converge rapidly for all k. The accuracy of Rkj will not be affected by the errors of Qoi, Qoj and Qok. The is determined by experiments with high precision. We use simultaneously four kinds of neutron energy spectrum monitors (also used as standards), use experimental Rij to determine x, and use x and tc calculate Rkj, Rkj, and . Then, very reliable results are obtained. This is the mono-standard or small-number-standards method in the neutron activation analysis.  
        关键词：neutron activation R-matrix elements;neutron energy spectrum monitor;neutron energy spectrum indicator;relative deviation from thermalization;mono-standard method   
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        发布时间：2022-09-13
      • Fengxiang Li,Jianzhou Zhang,Deshao Liu,Huiying Liu
        Vol. 10, Issue 7, (1987)
        摘要：The concentrations of 22 elements in the surrounding soil of coal-fired plant were determined by epithermal neutron activation analysis.Variations of the element concentration of the surface and depth of soil both before and after rainy season were studied for evaluating the effect of fly ash produced by coalfired power plant on the surrounding soil.  
        关键词：Epithermal neutron;Activation analysis;coal-fired;power plant;environment   
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        发布时间：2022-09-13
      • Xiuxia Li,Xinzhen Qian,Zhengsheng She
        Vol. 10, Issue 7, (1987)
        摘要：The NAA was applied to the multielemental analysis of the lake water taken from the upper, middle and lower reaches of the Jingpo lake. The distribution and the background values of 23 elements (As, Zn, Cr, Fe, Co, Sr, Ba, Rb, Cs, U, Th, Sb, Sc, Se, La, Ce, Nd, Sm, Eu, Tb, Yb, Lu and Au) in lake water were studied. The element contents of various sampling sites indicated that along the horizontal direction the element contents had no significant variation, but in the verticle direction, the content of Fe is increased with increasing depth. The analytical results were compared with the mean values of element contents given in the reference. It is shown that the water in Jingpo lake is out of artificial pollution, but the element contents were strongly influenced by the surrounding natural environment. Therefore the element contents should represent the natural backgrcund values of trace elements.  
        关键词：Neutron activation analysis;lake water;Trace element   
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        发布时间：2022-09-13
      • Jiansheng Chen,Honggui Dai
        Vol. 10, Issue 7, (1987)
        摘要：113mIn produced by 113Sn-113mIn producer as a tracer has been applied in the study of the movement of underground water flow. TLD made up of CaSO4 (Tm) in glass tubes has been chcsen as nuclear detector to determine the direction of the underground water flow in a borehole. The result shows that 113mIn as a tracer to determine the direction of underground water flow is suitable in some special sites such as the rock stratum.  
        关键词：direction of underground water flow;single borehole;tracer TLD;ionization chamber;113mIn   
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        发布时间：2022-09-13
      • Zongzhi Huang,Jiading zhang,Hongdi Zhou,Mingliang Yan
        Vol. 10, Issue 7, (1987)
        摘要：201T1C1 is an useful radiopharmaceutical. It is widely used to diagnose myocardial disease.A ICP emission spectrometrical method for determining impurities in 201T1C1 injection and 203PbCl solution is described. 201T1 in physiological saline and 203Pb in aqueous solution were checked for Al, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Ni, Pb, Sn, Tl and Zn with a sensitivities of 0.001 µg/ml to 0.010 µg/ml and relative standard deviations<10%.  
        关键词：201Tl 203Pb;Radiopharmaceutical;ICP-AES   
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        发布时间：2022-09-13
      • Xiaolin Ma,Yuexing Wang,Changquan Yun,Yongjie Lu,Fuqiang Su
        Vol. 10, Issue 7, (1987)
        摘要：In this paper the measurement of phantom absorbed dose distribution is discussed.The comparison between CaSO4:Dy-supermembrane detector and tissue equivalent ion chamber has been made. Results of TLD are found to be in good agreement with values obtained by the ion chamber.  
        关键词：supermembrane;detector phantom;60Co-γ irradiation;absorbed dose distribution   
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        发布时间：2022-09-13
      • Bishen Wu
        Vol. 10, Issue 7, (1987)
        摘要：This paper outlines the design of a cobalt-60 therapy installation in a densely populated area. The floor occupied and cost of installation is less than that of others. The environment safety has been confirmed. The periscope observation window used is a novel, economical and practical one.  
        关键词：cobalt-60 therapy facility;Radiation protection design;periscope observation window   
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        发布时间：2022-09-13
      • Fenmei Hua,Junjie Fu
        Vol. 10, Issue 7, (1987)
        摘要：This paper describes the irradiation technique for accelerating the mellowness of Shaoxing wine filled with oxygen and nitrogen and the analysis of the amino-acid composition of the irradiated wine. The sensory evaluations during storage after treatment and determination of a number of indexes derived from chemical tests of the wine were also carried out.The results showed: Irradiation with appropriate doses shortened the period of wine mellowness, i.e., the wine became more fragrant with its flavour more mellow, sweet and, delicious and its components more co-ordinated. Its content of volatile ester was also increased.We found it advisable to have the wine filled with oxygen during irradiation, which proved to be conducive to significant enhancement in the wine-mellowness both in fragrance and flavour, and more volatile ester content than that of the controlThe irradiated wine kept 17 kinds of original amino acids, and an increase in amount of amino acids necessary to human body.  
        关键词：radiation preservation;accelerate ageing;sense taste;chemistry target determination   
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        发布时间：2022-09-13
      • Shengzu Chen
        Vol. 10, Issue 7, (1987)
        摘要：Some physical factors of liver SPECT were discussed such as consisting digital information selection, correction of rotation center, attenuation correction, uniformity correction and selection of rotation orientation. Good quality of tomographical imaging can be obtained if the factors mentioned above were strictly controled.  
        关键词：SPECT (single photon emission computed tomography);liver;Quality control   
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        发布时间：2022-09-13
      • Xi Zhou,Xilin Cai,Tianrui Zhao,Guohua Nan,Jianyi Li
        Vol. 10, Issue 7, (1987)
        摘要：Effects of Helicid (Hel) on glutamate decarbcxylase (GAD) and γ-aminobutyric acid transaminase (GABA-T) in the brain of normal and convulsive mice elicited by thiose-micarbazide (TSC) were studied by isotope paper chromatography. It showed that there was no obvious effect of Hel on GAD of normal or on GABA-T of normal and convulsive mice, but Hel could recover the GAD activity inhibited by TSC, which may be relative to its strengthening of inhibition of central nervous system  
        关键词：Helicid;GAD;GABA-T;thiosemicarbazide   
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        发布时间：2022-09-13
      • Meng Wang,Xiong Wu
        Vol. 10, Issue 7, (1987)
        关键词：diffusion equation;source term;equilibrium rate of radiation;application range;RaA (radium-A)   
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        发布时间：2022-09-13
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