比活度

光谱和能谱法测定磷矿渣中放射性元素的含量和比活度

Determination of Content and Specific Activity of Radioactive Elements in Phosphate Slag by Spectral and Energy Spectrum Analysis

65Zn在小麦各器官的比活度顺序为根＞籽粒＞颖壳≥茎叶；65Zn从土壤向小麦各器官的转移系数为：根＞籽粒＞颖壳≥茎叶。

The specific activity of 65 Zn and the transfer factor of 65 Zn in the organs of spring wheat were in the order as root > grain > wheat husk > stem leaf .

~（60）Co靶件放射性比活度分布测量

Distribution measurement of ￣( 60 ) co target radioactive specific activity

利用Mn－纤维富集海水中的Ra同位素，采用Mn－纤维直接射气法测量226Ra的比活度，228Ra的比活度采用228Ac的β计数法测量。

Radium isotopes in seawater were concentrated by Mn-fibre .

~（232）U示踪法测定样品中铀钍同位素的比活度

Determination of specific activity of uranium and thorium isotopes in samples by ~ ( 232 ) u tracer method

上海市2001年～2003年环境水~（137）Cs比活度监测

Monitoring of Specific Activity of ~ ( 137 ) Cs in Environmental Water in Shanghai during 2001 ~ 2003

所得产物经HPLC纯化后放化纯度>98%，其比活度达0.654TBq/g。

The radiochemical purity of the product purified by HPLC is more than 98 % , and its specific activity is 0.654 TBq / g.

~（90）Sr在双层孔隙介质迁移过程中比活度分布低谷的成因与特征

Forming and characteristics of lowest valley of ~ ( 90 ) sr specific activity distribution during migration in two-layer porous media

产品放射性比活度为740TBq／mol，放射化学纯度＞95%。

The specific activity is 740 TBq / mol , and the radiochemical purity is over 95 % .

北京居民骨中~（87）Rb比活度及所致内照射剂量估算

Determination of ~ ( 87 ) rb concentration in bone of Beijing residents and estimation of internal dose

水稻植株地上部分各器官中~（32）P主要集中在穗部谷粒中，其放射性比活度和总活度均为最高。籽粒放射性比活度约为营养器官的1.5～5倍。

4.32P tracer experiment indicated that 32P was concentrated in seeds , both their radioactivity and specific activity are highest , about 1.5 ~ 5 times higher than that of vegetative organs in different cultivars .

在进行~（137）Cs比活度分析时，探测效率是影响测量准确性的关键因素，所以，研究探测效率的粒度效应，在核测量方面也有不可忽视重要性。

The key factor affects the measuring accuracy is the detection efficiency in the analysis of specific activity of ~ ( 137 ) Cs .

用该法制备的[α-~（32）P]dATP比活度高，能够满足遗传工程研究中进行DNA缺口翻译标记及分子杂交等工作的需要。

The [ α - ~ ( 32 ) P ] dATP of high specific activity prepared by enzymatic method is satisfactorily used for the labelling of DNA ( probe ) by nick translation and'molecular hybridization .

125ILPT的放射性比活度为1.43MBq/μg，125I的总标记率为37.8%；

The specific radioactivity of 125I-LPT was 1.43 MBq / μ g , the total labeling rate of 125I was 37.8 % ;

进行了各类建材表面a、b辐射水平和其天然放射性核素g比活度关系的研究和不同饰材表面b辐射水平的饱和厚度研究。

We have studied the relationship between gamma specific activities of natural radionuclides and alpha and beta ray level in building materials used in interior decoration , and the saturated thickness of beta ray from the surface of different materials .

结果显示：（1）所得标记物放射化学纯度>95%，放射性比活度为3.33×105Bq/μg（23-HBA）；

The results showed that the radiochemical purity was over 95 % and the specific radioactivity was 3.33 × 105 Bq / μ g ( 23-HBA );

目的评价FDG-PET测量肺部肿瘤放射性比活度的有关影响因素。

Objective To evaluate the factors affecting the measurement of lung tumor activity concentration ( AC ) with FDG-PET .

赤泥水泥中的~（226）Ra、~（232）Th和~（40）K的平均比活度分别为202、211和140Bq·kg~（-1）；

In the cement made from the red mud , the average specific activities of 226 Ra , 232 Th and K are 202 , 211 and 140Bq / kg , respectively .

详细叙述了采用NaI低本底多道γ谱仪测量建筑材料天然放射性核素镭、钍、钾放射性比活度的原理与方法。

This paper describes the principles of detecting the radium , thorium , potassium radioactivity in architectural material using NaI ( Tl ) low background detector in detail .

结果合成的3H去甲乌药碱UV和HPLC图谱鉴定与去甲乌药碱标准品一致，放化纯>98%，比活度>370GBqmmol。

Results The UV and HPLC spectrum of the synthesized 3 H higenamine were identical with that of the higenamine standard , the radiochemical purity was more than 98 % and the specific activity was 370 GBq / mmol .

结论：本研究中ASODN以螯合剂EC与99mTc连接，形成的EC-ASODN其标记率高，放化纯高，比活度符合要求，与血浆蛋白结合率低，复合物稳定。

EC and ASODN were connected by chemical technology . This method is of high labeling yield , of high radiochemical purity , of suitable specific activity and of low plasma protein-combining rate .

在测得放射性核素226Ra、232Th和40K的比活度此基础上，计算了距地面1m高处空气中γ辐射吸收剂量率和年有效剂量率，并对γ辐射外照射水平进行了评价。

To assess the radiological hazard of the natural radioactivity in soil , the absorbed dose rate and annual effective dose rate were calculated .

结果：125I-leptin的放射性比活度为143MBq/μg，125I的总标记率为378%，用以建立的RIA各项技术指标均满足临床要求。

Results The specific radioactivity of 125 I-leptin obtained was 1.43 MBq / μ g , the total labelling rate of 125 I was 37.8 % , and the technical specifications of leptin RIA could meet the requirement for clinical use .

研究了乙肝表面抗原固相放免定量药盒的特性，包括HBsAg标准品的稳定性、固相塑料珠的包被条件和标记物比活度对标准线性范围的影响。

The properties of hepatitis B surface antigen HBsAg solid phase radioimmunoassay quantitative kit , including the stability of HBsAg standard and the influences of solid phase beads coating and specific activty of the tracer on the classic linear range , are investigated .

60Coγ刀治疗源是γ刀治疗设备的核心部件，具有活性区小，比活度高，半影区小，聚焦成形好，使用周期长等特点。

Co γ gamma knife source is a kernel unit of γ knife therapy equipment . It has small active core , high specific actvity , narrow half dark area , best focus form , long use period .

研制结果为：碘标记的7αOIADPN放化纯度大于95%，标记率为81%～90%，比活度高达83.25PBq/mol，室温下放置24h，放化纯度仍大于90%。

The radiochemical purity of radioiodinated 7 α - O-IA-DPN is more than 95 % , and still greater than 90 % kept for 24 h at room temperature . Radiochemical yields is 81 % ~ 90 % , and specific radioactivity is 83.25 PBq / mol.

给出了主要的试验结果，包括2号土柱与4号土柱黄土中85Sr比活度垂直分布的直接测量结果和4号柱黄土中60Co和137Cs比活度垂直分布的取样测量结果。

The main results , including vertical distribution of specific activities of 85 Sr in loess in columns No. 2 and No. 4 by direct measurement as well as that of 60 Co and 137 Cs in column No.

非饱和浸出实验完成后，经分层分段切削取样测量，得到了被浸水泥固化体试块内剩余137Cs的比活度分布。

Specific activity distributions of residual radionuclide , ~ 137Cs , in solidified cement waste form after unsaturated leaching experiments are obtained through the measurement of samples cut into scraps according to layer and section .

既可自动计算钾、铀、钍含量，又可用于现场快速检测石材、建材和工业废渣中天然放射性核素226Ra、232Th、40K的比活度，并可区分A、B、C3类建材产品。

It can be used both to automatically calculate contents of 40 K , U and Th , and to fast measure the specific activity of natural radioactive nuclides 226 Ra , 232 Th and 40 K in stones and architecture materials and industrial wastes on the spot .

本文介绍了用（232U）作示踪同位素，测定岩石、土壤、水体中铀同位素及岩石中钍同位素比活度的方法。

This paper presents a determination method of specific activity for uranium isotope in rocks , soil , water and thorium isotope in rocks using 232U as a tracer isotope .