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      2020 年 第 0 卷 0 期

        综述

      • 瑞德 马,治平 潘,福宽 陆
        1981, 04(3)
        摘要：高能辐射应用于环境保护是一项新发展起来的技术，已做的大量研究工作都说明高能辐射可以对废水、消化污泥、排放废气及其固体废物进行有效处理。一些中试装置（如用电子束辐照从燃烧废气中同时除去NOx和SO2，消化污泥的辐照处理及用辐解法对聚四氟乙烯和纤维素进行有效的利用等)已成功地进行了运转。由于它的独特优点，本法将进一步得到应用。  
          
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        发布时间：2022-08-16

        科研成果报告

      • Wu Jun-heng,Zhang Da-ming
        1981, 04(3)
        摘要：A method, based on servo-compensation principle, for the modulation of nuclear rays or X-ray and frequency selective amplification has been analysed and evaluated. It turns out that the adoption of this method could result in the elimination of effects due to many unfavorable factors, such as: the environmental variation of temperatures pressure and humidity; the ageing of electronic devices; the fluctuation of power supply. Therefore, this method is very beneficial to the construction of various type, of high accuracy radioisotope instruments.  
          
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        发布时间：2022-08-16

        来稿摘登

      • 夏令 赵,道玲 庄
        1981, 04(3)
        摘要：缬氨酸是一种常见的中性氨基酸，在生理、生化基础理论研究中，14C标记的缬氨酸是重要的示踪剂之一。采用乙内酰胺的合成路线制备了DL-缬氨酸-1-14C。化学反应式如下。  
          
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        发布时间：2022-08-16
      • Nuclear Geophysic Research Laboratory, Chengdu College of Geology
        1981, 04(3)
        摘要：A portable radioisotope X-ray fluorescence analyser and an X-ray fluorescence logger have been designed and manufactured with the following characteristics: (1)Low power consumption due to the adoption of state-of-the- art GOS/MOS circuiting; (2) Small size and light weight, hence portable and applicable in the field; (3) Excellent stability in performance and reliability.Such analyser and logger have already found effective use in many kinds of ore deposits such as copper, iron, chromium, molybdenum, uranium and tin.  
          
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        发布时间：2022-08-16
      • Huang Mei-fen,Wu Wan-chun,Zhao Chang-yu
        1981, 04(3)
        摘要：Two methods and associate apparatus for rapidly on line measuring the silve content in photographic film emulsion by means of radioisotope source excited X-ray fluorescence are described. Following results are obtained with the first method: 1g/m2 silver content equals to 24 cps, analysis period is 200 seconds and relative error ±5%. The detector can be used with a universal radioisotope source X-ray fluorescence analyzer.In another method, the equivalent of 1g/m2 silver content is 1000cps, analysis period 10 seconds and relative error ±5% (95% confidence level) in the range of 1 ~8g/m2 silver content. According to this method, a silver gauge has well been designed and manufactured.Both these two methods are suitable for the application of determinating the silver content in coating process on line or in a routine test.  
          
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        发布时间：2022-08-16
      • Dai Teng-chang,Hu Ya-er,Xia Zong-qin,Ding Xiu-juan,Ju Jiu-hong
        1981, 04(3)
        摘要：A modified method of cGMP RIA is presented in this paper. Succinylation of cGMP was catalyzed by triethylamine in an aqueous medium and the 2'-o-ScGMP thus formed was conjugated with BSA or thyroglobulin under the action of EDCI. The ScGMP-BSA or ScGMP-TG obtained was used as an antigen to induce antibody in rabbits. 3H-cGMP (15 Ci/mmol) was used as the labelled ligand. Both labelled and unlabelled cGMP were acetylated with acetic anhydride and triethylamine prior to the addition of antiserum. Ka was estimated to be 2×109M-1; the final dilution of antiserum was 1:3000; the sensitivity of the calibration curve was 0.03 pmol; and the cross reaction with cAMP was 1:500. Treatment of plasma samples was improved by adding 1/10 volume of 3.3% acetic acid in ethanol and heating at 70℃ for 4 minutes to precipitate proteins. 100µl of the supernatant was used directly in each tube for immunoassay reaction. The procedure was thus simplified, since there involved almost no dilution of plasma. The within-assay variance and between-assay variance were 8.0% and 7.2% respectively. The cGMP content of normal plasma was found to be 4.75±0.32 pmol/ml (n=21) , which was very close to the values reported in recent literatures.  
          
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        发布时间：2022-08-16
      • 奋智 林,德福 沈
        1981, 04(3)
        摘要：环戊氨基酸（ACPC）是一种亲肿瘤药物。为了进行药理试验，制备了[羧基-14C]-环戊氨基酸。合成路线如下：  
          
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        发布时间：2022-08-16
      • Xu Zhi-cheng,Zhu Jia-long
        1981, 04(3)
        摘要：A simple highly sensitive method for monitoring total tritium in air is described. The air was first passed through an ethylene glycole bubbler to remove HTO, then, over a heated catalyst for oxidizing HT gas to HTO which was cellected in second ethylene glycol bubbler. Tritium was measured by liquid scintillation counter. The interference of absorption efficiency and recovery by sampling rate, relative humidity (R. H.) , sampling time (absorbed volume) and tritium concentration in air were studied. The conversion efficiency of HT on oxidized catalyst has been measured. This method can be applied to monitor of tritium laboratory, measurement of tritium leaking rates from tritium reservoir and survey of environment monitoring etc.  
          
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        发布时间：2022-08-16
      • Zhao Guang,Zhang Jing-xuan,Liu Zhen-shan
        1981, 04(3)
        摘要：Exposure of wild silkworm eggs to γ-ray from 137Cs or 60Co, in low dose was found to have remarkable effect as that of neutron from Ra-Be source conventionally used to increase production.Neutron from Am-Be source was also found to have such effect.By analyzing the dose contribution of neutron and γ-ray from these two neutron sources, it was that both neutron and γ-rау could produce effect on increasing production.  
          
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        发布时间：2022-08-16
      • Wu Jie-zheng,Yan Ci-fu,Jiang Li-guang
        1981, 04(3)
        摘要：We succeeded in making a ring-shaped target of tritium-titanium. The diameter of the ring is 150mm, the thickness of titanium layer is 1mg/cm2, the amount of absorbed tritium is 50 Curies, and the tritium to titanium atom ratio is about 1.3~1.4. With it as a target we perfomed a test at the SINR neutron-generator and bombarded the target with 200keV deuterium. The neutron yield reached 1011n/sec at first and then was decreased 3% after fifteen minutes.  
          
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        发布时间：2022-08-16
      • Cheng Hui-juan,Ying Hou-jie,Jing Lie,Li Wen-ying
        1981, 04(3)
        摘要：The scanner equipped with scintillator is used for thin-layer or paper radiochromatogram scanning of ordinaty nuclides emitting γ and β rays, and also for β nuclides of lower energy, e. g. 14C and 35S. The accuracy of displacement of uniform motion is better than 100±1mm. Its performance and data give-out is comparable with that of similar type imported instruments.This instrument can be used in quality control of radioisotope and labelled compound production, and in radiochemical, radiomedical, and radiobiological study.  
          
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        发布时间：2022-08-16
      • Deng Hong-zhang,Xie Bing-hua
        1981, 04(3)
        摘要：The structure of a radiochromatogram scanning equipment for tritium labelled compounds is described. Its efficiency (2~3%) , sensitivity (0.1μCi) and localization resolving power (5mm) are evaluated. It is compared with liquid scintillation counter.  
          
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        发布时间：2022-08-16
      • 义芳 叶,雪奇 章,若苓 华
        1981, 04(3)
        摘要：氚标记嘧啶类化合物在生理、生化和医学等方面的基础理论研究中，是不可缺少的放射性示踪剂。本文采用卤氚交换法制备[5-3H]-尿嘧啶和[5-3H]-尿嘧啶核苷。其反应式如下：  
          
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        发布时间：2022-08-16
      • 景芝 刘,夏令 赵
        1981, 04(3)
        摘要：本文介绍了DL-[7-3H]-去甲肾上腺素酒石酸盐在不同贮存条件下对稳定性的影响。将比度为6.8Ci/mM、浓度为1mCi/ml放射性样品的水溶液分别添加稳定剂2%乙醇和1%抗坏血酸，贮存在0℃和-196℃，定期用纸层析法测定其放化纯度。实验得出四条不同贮存条件下的分解曲线，结果表明，在0℃、2%乙醇溶液中，贮存半月就迅速分解，而在-196℃，1%抗坏血酸溶液中，贮存八个月仅分解3%。  
          
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        发布时间：2022-08-16

        工作简报

      • Group of Ge (Li) Detector, Institute of Nuclear Energy Technology, Qinghua University
        1981, 04(3)
        摘要：In this paper the fabrication technique of a single-ended coaxial Ge (Li) detector is described. The active volume of the detector is about 35cm3. The leakage current at 2500V bias is 4×10-11A. An energy resolution of 2.47 keV (FWHM) for 60Co (1.332 MeV) has been obtained.The technique of etch of surface without protection and the method of clean-up drift in the cryostat are discussed in detail.  
          
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        发布时间：2022-08-16

        知识介绍

      • 玟珉 王,达明 张,俊恒 吴
        1981, 04(3)
        摘要：离子束散射技术得到广泛应用还只有十几年的历史。目前，在国际上它已广泛应用于电子材料、核能材料及材料科学等领域。它的主要优点是简单、快速、直观、可靠。它无需标准样品即可进行定量分析，无需腐蚀、剥离表层即可给出深度分布信息。  
          
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        发布时间：2022-08-16
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