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radiochemical method
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  放化法
     THE ABSOLUTE DETERMINATION OF THE SPONTANEOUS FISSION YIELD OF 252Cf BY RADIOCHEMICAL METHOD.
     放化法测定~(252)Cf自发裂变产物的绝对产额
短句来源
     THE ABSOLUTE DETERMINATION OF THE SPONTANEOUS FISSON YIELD OF ~(252)Cf BY RADIOCHEMICAL METHOD
     放化法测定~(252)Cf自发裂变产物的绝对产额
短句来源
     The cumulative yields (CY) of 127gSn and l28Sn in the spontaneous fission of 252Cf have been determined by the radiochemical method. The values are (0. 0437 +0. 0021)% and (0. 145 + 0. 007)% respectively.
     用放化法首次测定了~(252)Cf自发裂变中~(127g)Sn和~(128)Sn的累计产额,其值分别为(0.0437±0.002)%和(0.145±0.007)%。
短句来源
     The fractional cumulative yields (FCY) of l33mTe and 133BTs in the sponta-neous fission of 252Cf have been determined by the radiochemical method. The values are 0. 533+0.014N and 0. 291+0. 042 respectively.
     用放化法测定了~(252)CF自发裂变中~(133m)Te和~(133g)Te的分累计产额,其值分别为FCY(~(133m)Te)=0.533±0.014,FCY(~(133g)Te)=0.291±0.042。
短句来源
     MEASUREMENT OF HALF-LIFE OF  ̄(126)Sn BY RADIOCHEMICAL METHOD
     放化法测定~(126)Sn的半衰期
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  放射化学法
     A radiochemical method for the determination of brain α ketoglutarate dehydrogenase activity
     放射化学法测定脑α-酮戊二酸脱氢酶活性
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     The high performance liquid chromatography (HPLC)and radiochemical method were applied to determine the dynamics of juvenile hormone titer and JH esterase activity in the nymphal stages of brown planthopper.
     用高压液相色谱及放射化学法 ,分别测定了褐飞虱Nilaparvatalugens 1~ 5龄若虫体内的保幼激素滴度与保幼激素酯酶活性变化 ,并用保幼激素类似物 (ZR 515)进行体表点滴加以验证。
短句来源
     Choline-acetyl-transfertase(ChAT) and acetylcholinesterase(AChE) activity in hippocampus and cortex of rats were measured by radiochemical method and hydroxylamine colorimetry separately.
     取脑 ,分区测定皮层和海马胆碱乙酰基转移酶 (放射化学法 )及乙酰胆碱酯酶 (羟胺比色法 )的活性 ;
短句来源
     Their learning-memory ability was evaluated by using Morris water maze and their ChAT activity in two different brain regions (cerebral cortexand hippocampus) was determined by radiochemical method.
     用Morris水迷宫检测学习记忆能力,用放射化学法测定大鼠皮层、海马ChAT活性。
短句来源
  “radiochemical method”译为未确定词的双语例句
     A radiochemical method of solvent extraction with PMBP CHCl 3 has been used to separate thorium from the fission products and irradiated target material in 238 U(n,α) 235 Th reaction for determination β decay endpoint energy of 235 Th.
     采用PMBP-CHCl3溶剂萃取法从238U(n,α)235Th反应的靶材料、裂变产物及其它反应产物中分离钍,以测定其β端点能量。
短句来源
     A new neutron deficient isotope 235 Am was produced via 238 Pu(p,4n) 235 Am reaction. The products were identified by means of the transporting of He jet system, separating of rapid radiochemical method and measuring of γ and X rays as well as X γ coincidence. The measured half life of 235 Am is 15±5min.
     一种缺中子新同位素235Am通过238Pu(p,4n)235Am反应而产生.产物借助He-jet系统的传输,快化学分离以及γ、X射线和γ-X(γ)符合测量等得到鉴别,测得其半衰期为15±5min.
短句来源
     The confidence interval of serum phospholipase A2 in 48 healthy subjects was between 461 9~623 2 u/L ( ±t 0 05 ,vS) Conclusion The assay of serum phospholipase A2 activity by using[ 3H] oleic acid labeled Escherichia Coli membrane was a very sensitive,specific and accurate radiochemical method.
     48例健康人血清 PLA2活力的 95%可信区间为 461 .9~ 62 3.2 u/ L ( x± t0 .0 5,v Sx)。 结论 :以 [3 H]-油酸标记的大肠杆菌膜为底物测定血清磷脂酶 A2活力是一种灵敏度极高 ,特异性较强 ,准确度满意的放射化学分析法。
短句来源
     The fission productCesium-137 and Iodine-131,which adsorped in the ion-exchange resin,wereanalysed by radiochemical method.
     对裂变产物碘-131和铯-137作放射化学分析。
短句来源
     The collecting Points of soil a re same as the measuringPoints of γ radiation dose rate of environmental ground 687 soil samples were collected andanalysed by radiochemical method, of which 359 points were sited in uniformly distributednetworks of size 25 km×25 km.
     基本与环境陆地γ辐射剂量率调查同位布点,全省共采集土壤样品687个,其中25km×25km网格点土样359个。 测量采用放化分析法。
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  radiochemical method
The reaction of free methyl cation with (isobutylamino)trimethylsilane was studied by the radiochemical method.
      
Gas-phase reaction of ethylsilylium ions with ethylene was studied by the radiochemical method.
      
The possibility for positive charge migration in SiC6H7+ cation from carbon to silicon (or vice versa) was studied by the radiochemical method.
      
The radiochemical method for selecting iodine isotopes from tellurium was used.
      
A rapid radiochemical method was employed for separating the americium isotopes from the complex products.
      
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A radiochemical method for the determination of strontium-90, Cesium-137 and Cerium-144 in marine organisms is described whereby Cesium-137 is selectively adsorbed by ammonium phosphato-molybdate (AMP) and further purified by Na3Bi2I9, and strontium-90, yttrium-90 and cerium-144 are preliminarily separated via oxalate precipitation at pH 1.5' and 4.5. Cerinm-144 oxidized by. a mixture of 8N HNO, and 0.1M NaBrO, is selectively separated on an extraction chromatographic column of Kel-F saturated with di-(2-ethylhexyl)...

A radiochemical method for the determination of strontium-90, Cesium-137 and Cerium-144 in marine organisms is described whereby Cesium-137 is selectively adsorbed by ammonium phosphato-molybdate (AMP) and further purified by Na3Bi2I9, and strontium-90, yttrium-90 and cerium-144 are preliminarily separated via oxalate precipitation at pH 1.5' and 4.5. Cerinm-144 oxidized by. a mixture of 8N HNO, and 0.1M NaBrO, is selectively separated on an extraction chromatographic column of Kel-F saturated with di-(2-ethylhexyl) phosphoric acid (HDEHP); to determine strontiUm-90, the daughter product yttrium-9.0 is selectively separated by other column of HDEHP-Kel-F at pH 0.8-1.0. The systematic analysis is convenient, efficient and accurate. Decontamination factors of the procedure are perfectly satisfactory, >105. The chemical recoveries are consistent with that required in radiochemistry. The method has been succesfully applied to the determination of strontium-90, cesium-137 and cerium-144 in our current invcstgation of marine radioactivity.

本文报导一种测定海洋生物中~(90)Sr,~(157)Cs和~(144)Ce的放射化学方法.~(137)Cs被磷钼酸铵(AMP)选择性吸附并为碘铋酸钠(Na_3Bi_2I_9)进一步纯化.~(90)Sr-~(90)Y和~(144)Ce在pH 1.5和4.5的条件下经草酸盐沉淀初步分离.用8NHNO_3-0.1M NaBro_3氧化~(144)Ce,在二一(2—乙基已基)磷酸(HDEHP)—聚三氟氯乙烯(Ke1—F)萃取色层柱上选择性分离.为了测定~(90)Sr,将子体产物~(90)Y再用HDEHP——Ke 1—F柱在pH0.8—1.0 的条件下选择性分离.系统分析简便、快速而准确.程序的去污系数良好,>10~3.化学回收率与放化回收率一致.方法已经成功地应用于海洋放射性调查中~(90)Sr,~(137)C_s和~(144)C_c的测定.

Independent yields of 82Br, 132I, 136Cs, 140La and the cumulative yields of 95Zr, 97Zr, 99Mo, 131I, 134I, 135I, 138Cs, 142La in the fission of 238U induced by neutrons of 14.7 MeV were determined by radiochemical methods. The correlation of independent yields with a Gaussian curve of charge distribution was investigated using various mass formulae, neutron emission functions and charge distribution hypotheses. The results seem to indicate that both the hypothesis of minimum potential energy with a non-shell-effected...

Independent yields of 82Br, 132I, 136Cs, 140La and the cumulative yields of 95Zr, 97Zr, 99Mo, 131I, 134I, 135I, 138Cs, 142La in the fission of 238U induced by neutrons of 14.7 MeV were determined by radiochemical methods. The correlation of independent yields with a Gaussian curve of charge distribution was investigated using various mass formulae, neutron emission functions and charge distribution hypotheses. The results seem to indicate that both the hypothesis of minimum potential energy with a non-shell-effected mass equation and the hypothesis of equal charge displacement with a shell-effected equation gave almost equal best fits to the data. The Gaussian curve of the charge distribution and AZ, the deviation of the experimental value of the most probable charge from the constant charge density obtained in our experiments were found to be in agreement with those in the fission of 235U induced by thermal neutrons.

在14.7兆电子伏中子引起~(238)U裂变中,用放射化学方法测定了~(82)Br、~(132)I、~(136)Cs、~(140)La4个独立产额以及~(95)Zr、~(97)Zr、~(99)Mo、~(131)I、~(133)I、~(134)I、~(135)I、~(138)Cs、~(142)La等9个累积产额。实验测定的独立产额和其他文献报道的~(96)Nb、~(139)Cs、~(139)Ba一共7个独立产额用高斯电荷分布曲线进行了关联,计算中采用了各种质量公式、电荷分布假设和中子发射函数。结果指出,使用不考虑壳效应的Grenn质量公式的最小位能假设以及考虑壳效应的Coryell质量公式的等电荷位移假设给出几乎同样的最佳拟合,得到的电荷分布曲线以及实验的最可几电荷Z_p对恒电荷密度的迁移ΔZ都和~(235)U的热中子裂变实验结果相一致。

The cumulative yields of 95Zr, "Mo, 103Ru, 106Ru, 144Ce and 147Nd in the fission of 238U induced by neutrons of 14.9 MeV were determined absolutely by radiochemical method. The 14.9±0.46 MeV neutrons were produced in the T (D,n)'He reaction using the 600kV Cockcroft-Walton type accelerator. The neutron flux varied between 2×109 and 1010 neutrons/sec. In this work the natural uranium was used as material of sample and standard targets. The standard targets were prepared by molecular plating and the sample...

The cumulative yields of 95Zr, "Mo, 103Ru, 106Ru, 144Ce and 147Nd in the fission of 238U induced by neutrons of 14.9 MeV were determined absolutely by radiochemical method. The 14.9±0.46 MeV neutrons were produced in the T (D,n)'He reaction using the 600kV Cockcroft-Walton type accelerator. The neutron flux varied between 2×109 and 1010 neutrons/sec. In this work the natural uranium was used as material of sample and standard targets. The standard targets were prepared by molecular plating and the sample targets were uranium metal disks with masses ranging from 1.5 to 3 gramms. The absolute fission rate of the sample target was measured by double fission ionization chamber.The irradiated targets were dissolved, and carriers of each element were added. By means of modified standard radiochemical procedures the above mentioned nuclides were separated, purified and mounted. The radioassay of radionuclides separated from the sample was carried out by using two types of detectors, namely, a low background counter for β-counting, and Nal(Tl) crystal detector coupled with a single channel analyzer for γ-counting. Both of the detectors were calibrated by 4π/β-γ coincidence counting.The cumulative yields determined by the above mentioned method are listed in following table. The errors given in the table are total errors including statistical and systematic errors. The yield values of this work are found to be in good agreement with most reported yields within error limits.

本文叙述了用放化方法测定14.9MeV中子诱发~(238)U裂变时的裂变产物~(95)Zr,~(99)Mo,~(103)Ru,~(106)Ru,~(144)Ce和~(147)Nd的绝对累计产额,其结果分别为(4.96±0.22)%,(5.44±0.20)%,(4.75±0.23)%,(2.51±0.13)%,(4.01±0.21)%和(2.13±0.11)%。裂变率是用双裂变室测量的,裂变产物核的衰变率用经4πβ-γ符合法刻度过的低本底2πβ卢和NaI(T1)测量仪测定。

 
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