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radiochemical yield
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  放射化学产率
     The labelling rate was 92% and the overall radiochemical yield was 78% with radiochemical purity of 95%.
     标记率为92%,放射化学产率为78%,产品的放射化学纯度>95%。
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     RESULTS The corrected radiochemical yield of 18F-FDG was about 72%,the whole synthesis time was 50 min, and the radiochemical purity was above 95% by HPLC and TLC respectively. All quality criteria of 18F-FDG met the requirements of the pharmacopoeia of USA.
     结果 经时间衰减校正后 ,18F FDG放射化学产率约为 72 % ,总合成时间为 5 0min ,各项质量控制指标符合美国药典要求。
短句来源
     Results FECH was synthesized in about 25% radiochemical yield with decay-correction and more than 99% radiochemical purity with a total radiosynthesis time of 80 min.
     结果 FECH放射化学产率为 2 5 % ,总放化合成时间为 80min ,放射化学纯度 >99%。
短句来源
     Results The corrected radiochemical yield was about 54%, and the chemical and radiochemical purity was above 95% by high-performance liguid chromatography and thin-layer chromatography.
     结果放射化学产率约为54%, 用TLC法和HPLC法测定化学纯度均大于99%,放化纯度均大于95%,18F-FDG各项质量控制指标符合药典要求。
短句来源
     The operation process was simple and the total synthesis time was less than 50 min. The radiochemical yield was about 40% (without decay-correction), and the radiochemical purity was more than 97%.
     放射化学产率约为40%(未经衰变校正),放射化学纯度大于97%,合成时间小于50min。
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  “radiochemical yield”译为未确定词的双语例句
     The radiochemical yield of 111In is 4.4 MBq.
     ~(111)In的放射化学产额是4.4MBq·μA~(-1)·h~(-1)。
短句来源
     The complex of fac-[188 Re(H_2O)_(CO)_3]+ is synthesized with an overall radiochemical yield of 80%, and with more than 95% radiochemical purity after Sep-Pak separation.
     同时合成了放射性前体化合物fac[188Re(CO)3(H2O)3]+,放化产率约为80%,SepPak分离后,放化纯度大于95%。
短句来源
     Results It took 20 min for synthesizing 18F-FDDNP at CPCU, the radiochemical yield was 35.7% (end of synthesis), the radiochemistry purity was over 95%.
     结果18F-FDDNP放化产率为35.7%(不校正),合成时间为20min,无需HPLC分离,放化纯>95%。
短句来源
     Under the optimum conditions, the composite nano-particles of (110Agm) Ag/TiO2 were synthesized with radiochemical yield of 93.6% and specific volume radioactivity of 0.6MBq/mL.
     实验结果表明在最佳反应条件下,用聚酰胺薄膜层析法测得约有93.6%的110Agm沉积在TiO2纳米微粒表面,放射性浓度为0.6MBq/mL;
短句来源
     ~(18)FMISO is synthesized automatically on CPCU by adjusting the parameters. The synthesis time is 55 min; The radiochemical yield and purity are 46.2%(EOS) and >99%,respectively.
     通过调节参数,在CPCU上实现了18FMISO的自动化合成,合成时间约为55 min,放化产率46.2%(EOS),放化纯度>99%。
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  相似匹配句对
     The radiochemical yield of 111In is 4.4 MBq.
     ~(111)In的放射化学产额是4.4MBq·μA~(-1)·h~(-1)。
短句来源
     10 yield.
     结果表明,复合肥不同施用量对油研10号的产量产生显著影响。
短句来源
     The yield is 65%.
     产品收率为65%。
短句来源
     The total chemical yield and radiochemical yield were all 53%.
     合成的化学收率和放化收率均为53%.
短句来源
     Radiochemical Estimation of Monoamineoxydase
     单胺氧化酶的放射化学法测定
短句来源
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  radiochemical yield
The radiochemical yield of the synthesis is 50% (by the end of bombardment).
      
The radiochemical yield of I and Ia, corrected for the 18F decay, was 35-40 and 60-65%, respectively.
      
The procedure is used in the Institute of Human Brain, Russian Academy of Sciences for routine synthesis of FDG; the radiochemical yield of the product by the end of synthesis (EOS) is reproducibly high: 63±3% (n = 40).
      
The radiochemical yield corrected for the 11C decay was 2-16% at the synthesis time of 60-66 min (with an RB-86 robotic system, Anatech).
      
The optimal amounts of DMAE (25 μl in 50 μl of ethanol) and tC18 (0.1 g) were found, providing a high radiochemical yield of the labeled choline (85%, corrected for radioactive decay) and radiochemical purity of more than 99.5%.
      
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Isotopic exchange reactions of sulfur-containing compounds (i. e. carbon disulfide, thiophosphoryl chloride, ethyl phosphonothionic dichloride, phenyl phosphonothionic dichloride, diethyl phosphorochloride thionate, triethyl phosphorothionate, diethyl disulfide, ethyl mercaptan) with ~(35)S in the presence of aluminum chloride were studied. With the first four compounds the reactions proceeded rapidly and smoothly, giving chemical yields of 70~95%. Radiochemical purity of these four products was identified by...

Isotopic exchange reactions of sulfur-containing compounds (i. e. carbon disulfide, thiophosphoryl chloride, ethyl phosphonothionic dichloride, phenyl phosphonothionic dichloride, diethyl phosphorochloride thionate, triethyl phosphorothionate, diethyl disulfide, ethyl mercaptan) with ~(35)S in the presence of aluminum chloride were studied. With the first four compounds the reactions proceeded rapidly and smoothly, giving chemical yields of 70~95%. Radiochemical purity of these four products was identified by the preparation of derivatives. With a high ratio of sulfur compound to ~(35)S, the radiochemical yield could approach the chemical yield. This method proved to be a good method for preparing ~(35)S labelled compounds. Compounds containing both P=S and R—O—P linkages, such as diethyl phosphorochloride thionate and triethyl phosphorothionate, exchanged only slightly, probably as a result of the side reaction of R—O—P with aluminum chloride. Diethyl disulfide exchanged about 12%, and ethyl mercaptan did not exchange at all.In connection with the mechanism of catalytic action of aluminum chloride, the following phenomena were observed: A complete exchange could be effected when carbon disulfide was heated at 100℃ for 1 hr or thiophosphoryl chloride heated at 80℃ for 20 min. These reactions proceeded with color change (when darkish aluminum chloride was used, no color change could be observed indicating no exchange). As it seemed quite possible that these reactions proceeded through a radical mechanism, an ESR study was undertaken. Signals were observed, and both showed three lines, with g values 2.0039, 2.0052, 2.0072 (DPPH used as a standard) for thiophosphoryl chloride and 2.0046, 2.0065, 2.0067 for carbon disulfide, We suppest that aluminum chloride as a strong Lewis acid might attack and open the eight membered ring of elemental sulfur, and the linear chain thus formed suffered homolytic fission and provided sulfur radicals which could attack and exchange with the sulfur atom of other sulfur compounds.

研究了~(35)S与C=S、P=S、C—S—S—C、C—SH等类型硫化物用三氯化铝催化的交换反应。二硫化碳、硫代磷酰氯、乙基硫代膦酰二氯、苯基硫代膦酰二氯等用此法交换,均得到良好的化学产率与放射产率。二硫化碳或硫代磷酰氯与三氯化铝、硫共热,显示三个顺磁共振峰,因此初步推测交换反应为自由基反应。含有R—O—P键的P=S类化合物与三氯化铝发生副反应,故未能很好交换。二乙基化二硫的交换率颇低,乙硫醇则无交换。

The method of preparation of 125I-4-iodo-phenoxyacetic acid is described. The intermediate phenoxyacetic acid were synthesized from phenol and chloroacetic acid. Then the proposed compound was obtained when phenoxyacetic acid reacted with I-sodium iodide in the presence of chloramine-T. The product by using silica gel thin layer chromatography analysis showed that Rf= 0.84, the radiochemical purity and specific activity was 90% and 1.83mci/mMol, the radiochemical yield was 70%. The product was suitable...

The method of preparation of 125I-4-iodo-phenoxyacetic acid is described. The intermediate phenoxyacetic acid were synthesized from phenol and chloroacetic acid. Then the proposed compound was obtained when phenoxyacetic acid reacted with I-sodium iodide in the presence of chloramine-T. The product by using silica gel thin layer chromatography analysis showed that Rf= 0.84, the radiochemical purity and specific activity was 90% and 1.83mci/mMol, the radiochemical yield was 70%. The product was suitable for tracer study. (CH)

本文介绍了~(125)Ⅰ—4—碘苯氧乙酸(增产灵)的合成方法,采用氯胺T氧化法新合成工艺。以苯酚和一氯乙酸为原料,先制成中间产物苯氧乙酸,然后在氯胺T存在下,使其与~(125)Ⅰ-碘化钠反应得到~(125)Ⅰ—4—碘苯氧乙酸。产品经硅胶薄层分析,R_f=0.84,比放射性为1.83mci/mMol,放化纯度>90%,产率为70%,适用于示踪研究。

Chromatographic separation of 211At and a method for the measurement of radioactivity in Model FJ-2109 automatic chromatography scan system are reported. To optimize the measurement of radioactivity,the channel width and the scan speed are selected on two-dimensional "window diagram" and a narrow region of the measurement conditions that will give acceptable radioactivity counts is found. The method is convenient, efficient and accurate. Absorption chromatography of 211At produced by irradiating Bi target with...

Chromatographic separation of 211At and a method for the measurement of radioactivity in Model FJ-2109 automatic chromatography scan system are reported. To optimize the measurement of radioactivity,the channel width and the scan speed are selected on two-dimensional "window diagram" and a narrow region of the measurement conditions that will give acceptable radioactivity counts is found. The method is convenient, efficient and accurate. Absorption chromatography of 211At produced by irradiating Bi target with 27 MeV helium particles using 1.2m cyclotron has been investigated. After the nuclear reaction 209Bi(α,2n)211 At, the Bi target is oxidized by oxygen at 500℃ and 211At is distilled by O2/N2(V/V=1: 1) sweeping at a temperature of 720℃ in a quartz still and 211At is adsorbed on a silica gel column. Rf of 211At shows higher value on paper chromatography with dimethyl formamide than on silica gel G, silica gel H or aluminum oxide TLC with chloroform-methanol. The synthesis of 211At-uracil indicates that it can be prepared by free 211At or by oxidizing Na211 At and the radiochemical yield depends on 211At concentration, reaction temperature and time.

本文报道~(211)At的色层分离及其在FJ-2109型自动扫描色谱仪上的放射性测量方法。为了使测量达到最佳化,在二维“窗图”上选择道宽和扫描速度,有一个测量条件的狭窄区域给出好的放射性计数。这种实验设计和分析方法,既简便、快速且准确,适用于β或γ放射性核素的扫描色谱测量。 还研究了在1.2m回旋加速器上用27MeVα粒子束辐照Bi靶产生的~(211)At的吸附色层。在特制的石英蒸馏器中干法蒸馏,并经硅胶柱分离纯化使~(211)At得到最佳分离。~(211)At放射性薄层色谱和纸色层表明,二甲基甲酰胺的纸色层R_f大于用氯仿-乙醇以硅胶G,硅胶H或氧化铝为固定相的R_f。游离态的~(211)At或氧化Na~(211)At能制得~(211)At-屎嘧啶标记化合物,放射性产额依赖于~(211)At浓度,反应温度和时间。

 
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