最新刊期
      2020 年 第 0 卷 0 期

        综述

      • 康泰 荣
        1981, 04(1)
        摘要：本文围绕如何获得满意的抗体这个问题，就小分子物质的免疫原性、载体的作用、抗体的多样性，载体的选择和结合方式的影响等五个方面，从免疫学理论上进行了讨论。  
          
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        发布时间：2022-08-16

        科研成果报告

      • Cao Mei-xun,Liang Su-xiang,Dong Xiao-qin
        1981, 04(1)
        摘要：An efficient radioimmunoassay for determination of the physiological level of progesterone in human serum was developed, using 3H-labelled progesterone as radiologand and progesterone-11α-succinyl-BSA as immunogen. It was applied to determine the serum progesterone level of women in regular menstruation in second trimester of pregnancy and administration of the aborfifacient.  
          
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        发布时间：2022-08-16
      • Zhu Jia-bi,Liu Jing-yi,Lü Shang-nü,Gu Jia-hui
        1981, 04(1)
        摘要：The absolute intensity of medical isotopes 131I and 198Au with a short half-life has been measured by the efficiency extrapolation method of 4πβ-γ coincidence absorption curve. The result of the measurement has been corrected for background, dead time, resolving time respectively. The correction for the short half-life has also been considered. The maximum error of the measurement are 0.57% and 1.7% for 131I and 198Au respectively. After a little change of the apparatus, we have measured the nuclide with electron capture decay.  
          
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        发布时间：2022-08-16
      • The group for nuclear reaction analysis
        1981, 04(1)
        摘要：This paper describes a method of measuring the depth and concentraction of impurity layer using nuclear reaction analysis. The phosphorus in silicon was bombarded by low energy proton beam. The depth and concentraction of phosphorus layer in monocrystalline silicon was measured by the yield curves of 31P (p, α)28Si resonance reaction, and the errors in experiment were discussed.  
          
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        发布时间：2022-08-16
      • Wang Han-ying,Ni Min-hua,Xu Zhi-li
        1981, 04(1)
        摘要：The graft copolymerization of Methacrylic acid-divinylbenzene mixed monomers from its aqueous solution onto pre-irradiated F46 film was studied in detail. The total dose of electron beam pre-irradiation laid between the range of (3~8) ×105rad and the reaction temperature was 80~95℃. The duration for graft copolymerization various with the total absorbed dose and reaction temperature.The optimum composition of aqueous solution of mixed monomers was obtained from the phase diagram of Methacrylic acid-divinylbenzene-H2O ternary system therefore constructed.The resulting grafts can give cation exchange membranes with excellent electrochemical properties and high mechanical strength.The membranes have following major characteristics:1. Ion exchange Capacity (IEC) 2~3 meq/g2.Specific resistance (ρ) 50~100 Ω-cm3.permselectivity 95~98%4. Tensile strength ≥160kg/cm2  
          
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        发布时间：2022-08-16
      • Liu Shu-lin,Zhang Li-min,Wang Ling-zhen,Zhou Zhi-gen
        1981, 04(1)
        摘要：The X-ray exposures in unit of C.kg-1 or Röentgen were measured by a parallel—plate free air ionization chamber. The plate distance was 20.9cm. The length of collector was 10cm. The correction factors were determined. The uncertainty of measurement was about 1.8% for 60~250kV X-rays. The long-term standard deviation was ±0.1%.  
          
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        发布时间：2022-08-16
      • Yin Jian-hua
        1981, 04(1)
        摘要：It is sometimes necessary to monitor and control the thicknees of a film during the process of vacuum evaporation. This paper describes a quartz oscillator for this purpose. It is based on the frequency variation caused by the change in thickness of crystal surface. The calibrations for frequency variation per unit thicknees have been performed using six elements of Pb, Bi, Cu, Au, Al, and Ag.  
          
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        发布时间：2022-08-16
      • Zhang Gui-sun,Chian Yin-e,Hua Zhi-fen
        1981, 04(1)
        摘要：Two resins with chelating group of made by Nankai university were used. Adsorptions of Rhodinium and Iridium on resins were measured unde static conditions at different concentration of HCl at room temperature and 100℃ using 101mRh and 192Ir as indicators. The adsorption reached >80% for RhIII and >90% for IrIV at optimal conditions. It was found that these chelating resins have higher selectivity for noble metals than most of other metal ions. (Al3+, Fe3+, Cu2+, Co2+, Ni2+ etc.)  
          
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        发布时间：2022-08-16
      • Chen Jin-zhong,Mu Chang-yun
        1981, 04(1)
        摘要：The exposure in a radiation field with a large-scale extended radiation source and its theoretical estimation is shortly described in this paper. The theoretical values are in good agreement with the measurements. In case of a plate-type radiation source made up of putting numerous cobalt rods together, the distribution theory on field strength of extended radiation source may be used to evaluate the exposure distribution in the radiation field and, therefore, to obtain the places at which the dose in demanded. The relative error between the theorical and measured values is in general less than 9%.  
          
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        发布时间：2022-08-16

        工作简报

      • Lin Sen-hao,Bao Jin-rong,Zhang Jia-ding
        1981, 04(1)
        摘要：Nitrogen was determined in Ta and Nb with charged particle Activation Analysis. The 14O activity from the reaction 14N (p, n)14O is produced by a beam of protons of 7.0 MeV. After chemical etching, the 14O activity (Eγ=2.313 MeV) of the sample was measured by means of a Ge(Li) or NaI(T1) detector. The half-life of 14O is 70.5sec. The analysis is nondestructive, and interferences do not arise. This method gives sensitivities of 0.5 and 6µg · g-1 for the analysis of Ta and Nb, respectively. Each analysis lasts about 5min. The method is applicable to determine trace nitrogen without chemical separation.  
          
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        发布时间：2022-08-16

        出国考察报告

      • 翰臣 罗
        1981, 04(1)
        摘要：放射性地球物理仪器是核技术应用的一个重要领域。它广泛地用于铀及其资源的勘探、地震预报、环境监测等部门。加拿大由于铀矿资源丰富，因此在该领域中处于领先地位。笔者曾于去年赴加拿大考察，现将加拿大近几年来在放射性地球物理仪器方面取得的进展介绍如下：  
          
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        发布时间：2022-08-16

        简讯

      • 树轩 周
        1981, 04(1)
        摘要：美国橡树岭ORTEC公司研制成一种可携式X荧光分析仪。此仪器能在矿山现场测定金的含量，灵敏度可达20ppm。仪器能适应矿山上的高温、高湿度、震动及粉尘环境。分析仪由手提式探头、主机及支架组成。探头内装有120mCi 109Cd放射源、高纯锗探测器、小型液氮冷却器及前置放大器等。主机是一台高计数率高分辨率的小型γ谱仪系统，重约7kg。109Cd源置于带有钼滤光片的钨准直器内。钼片的作用是过滤源的22keV X射线。用液氮冷却高纯锗探测器和前置放大器的场效应管时，仪器探测109Cd的88keV的γ射线能获得675eV分辨率。  
          
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        发布时间：2022-08-16

        知识介绍

      • 淇昌 沈
        1981, 04(1)
        摘要：气液层析（Gas-Liquid Chromatography，简称GLC）是近二十多年来特别是一九六〇年以来迅速发展起来的一项技术。它在生物化学感兴趣的天然或人工合成化合物中应用十分广泛，可用来定性和定量测定混合物中的个别组分。如果它所研究的对象是3H、14C标记的化合物，测定其层析柱流出气的放射性，那么，除了常规的GLC分析外，还可测得样品中每个标记组分的放射性比度。这种GLC与放射性测量的联用即构成了GLC的一项专门技术——放射气液层析（Radio-Gas-Liquid Chromatography）。它在甾体激素、脂肪酸等多组分复杂混合物的分析方面有着广泛的用途。  
          
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        发布时间：2022-08-16

        来稿摘登

      • 西华 王,小义 韦,森 杨,发伦 冯,建章 陈
        1981, 04(1)
        摘要：131I-甲苯胺蓝对早期食管癌进行体外定位检测是一个有效的方法。本文采用一种简易的方法制备了131I-甲苯胺盐，并经小白鼠口服试验表明产品无毒，胰脏、甲状旁腺和肾脏中有少量浓集，经胃、小肠大量排出，十二小时后，各脏器均无放射性。合成路线如下：  
          
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        发布时间：2022-08-16
      • 惠源 李,关福 刘
        1981, 04(1)
        摘要：由14C标记的甲基丙烯酸甲酯单体经聚合制成的14C放射源，一般可用于造纸工业的生产流水线上连续测量电容器纸的厚度。也可以作为14C参考源使用。  
          
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        发布时间：2022-08-16
      • 耀章 黄
        1981, 04(1)
        摘要：正常小白鼠（体重18～20g）及S180肿瘤小鼠分成若干组，每组鼠5只。鼠尾静脉注入0.3ml内含离子型66Ga约5µCi，注入30、60、90分钟后杀死鼠，解剖收集血液、肌肉、骨骼、肝、肾、肿瘤，称量后测其放射性。与注入量相比，计算出每克脏器组织摄取的百分率，并以肿瘤组织与其他脏器组织作比较，计算出肿瘤／脏器中放射性比值（见表1～3）。  
          
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        发布时间：2022-08-16
      • 义芳 叶,雪奇 章,善根 江
        1981, 04(1)
        摘要：近年来随着我国农业、医学、生物等科学研究的广泛开展，对高比度氚标记胸腺嘧啶及其核苷的需求日益增加。为此，我们以5-甲酰基尿嘧啶作原料，催化还原制得甲基-氚胸腺嘧啶，化学产率达94.8%，放化纯度达95%以上。再用酶法转化成胸腺嘧啶核苷，放射性比度均为34Ci/mM，放化纯度达98%以上（化学反应式见下页）。  
          
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        发布时间：2022-08-16
      • 耘 王,福增 要,元芳 吴,国栋 吴
        1981, 04(1)
        摘要：人们为了研究自然变化过程中水的某些作用，研究生物变化和化学变化的机制，常藉助于氚水及利用氚水制得的氚标记有机化合物。因此氚水具有重要的意义。我们用氧直接催化氧化氚的方法来制备氚水，可以制得纯度很高的氚水。制备方法如下：  
          
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