1)specific activity比活度
1.Computerized γ-spectrometric specific activity-meter Model H-90B;H-90B微机γ能谱比活度测量仪
2.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.H-90Bγ能谱比活度仪是一种便携式微机数字化的四道微分γ能谱比活度测量仪器。
3.By determining specific activity of nuclein Cs-137 in s oil pellet samples with different size, the logarithm relation between specific activity of Cs-137 in soil and surface area of soil pel lets is obtained.通过测定不同颗粒大小的土壤样品所含核素铯 - 1 3 7的比活度 ,发现土壤所含铯 - 1 3 7的比活度与土壤表面积存在着对数相依关系 。
2)ratio activity比活度
1.Microcomputer γ spectrum ratio activity meter;微机γ能谱比活度测量仪
3)137Cs activities137Cs比活度
1.137Cs activities in purple surface soil on grass land have a good relationship with the medium grain size(d50)by sieving method,but do not have a defined relationship with the medium grain size(d50)by normal method.紫色土草地表层土壤的137Cs比活度与样品的筛分中值粒径(d50)相关较好,而与颗分中值粒径没有明显的相关性。
4)Activity ratio活度比
1.such as Oxidationreduction environment of agaifersystem,degree of rock retarding (adsorbing)radionuclides ingroundwater etc according to natural radionuclides activity ratio relative to ￣(222)Rn, retardationfactor,dlstrobution coefficlent and radionuclide concentration in the groundwater.本文通过地下水中天然放射性核素的活度比值、阻滞系数、分配系数以及核素浓度的研究，阐明了含水系统的氧化还原环境，岩石对水中放射性核素的阻滞（吸附）作用等地下水环境问题。
2.The paper introduces the method of dating the zero time by utilizing the activity ratio of two fission products in no-isobaric or parent-daughter fission products in isobaric.文章介绍利用不同质量链上两种裂变产物或同一质量链上母子体裂变产物的活度比来确定CT- BT国际比对样品零时的方法。
英文短句/例句
1.Method for measuring the activity ratios of 226Ra to 228Ra in geological water samplesGB/T13072-1991地质水样中226Ra/228Ra的活度比值分析方法
2.Activity coefficient Number expressing the ratio of a substance's chemical activity to its molar concentration.活度系数:化学术语,活度系数指物质的化学活度对其浓度之比。
3.They have a great time in the peony pavilion.二人在牡丹亭度过了无比快活的时光。
4.A Cross-Cultural Comparison Study of Middle School Students’Life Satisfaction;中学生生活满意度的跨文化比较研究
5.Comparison on analysis of ~(210)Pb using alpha and gamma techniquesα法与γ法测定~(210)Pb活度的对比
6.RELATIVE CONDUCTIVITY, SALINITY, CHLORINITY AND ACTIVE SILICATE IN THE JIULONG RIVER ESTUARY九龙江河口区的比电导、盐度、氯度和活性硅酸盐
7.Mount Merapi is the most active volcano in Indonesia.美拉比火山是印度尼西亚最活跃的火山。
8.Make the page size flexible. Declare percentage widths for table and cell parameters.尺寸要灵活，表格与基本设置百分比宽度。
9.The amplifier has high linearity、high CMRR and is easy to be controlled.该放大器控制灵活，线性度好，共模抑制比高。
10.A Comparison on Quality of Life in Patients with Severe COPD and Those with Non-small Cell Lung Cancer.;重度COPD患者和非小细胞肺癌患者生活质量比较
11.Study on status of environmental and life satisfaction among residents in Yayuncun community in Beijing;北京市亚运村社区居民环境与生活满意度比较
12.A Comparison of College Students Life Satisfaction in Chinese Mainland,Hong Kong and America;中国内地、香港和美国大学生生活满意度比较
13.Constrast Study on Attitude Towards Sport of Han-Tibetar Coll ege Students at Colleges and Universities in Qinghai;青海高校汉藏大学生体育活动态度对比研究
14.British labourers living status comparison under the family-workshop system and factory system;英国家庭作坊和工厂制度下劳工生活状况比较
15.Comparative Study on the Phenol Decomposition Vigour of Super- bacterium under Different Phenol Densities;不同苯酚浓度下耐酚优势菌的活力比较
16.The Effect of Competition Stress on Cortisol, Secretory Immunoglobin A and Amylase Activities in Saliva in Elite Archers比赛应激对唾液Cor、SIgA浓度及SAM活性的影响
17.Northeast Comparative Study of Junior High School Life Satisfaction in Urban and Rural Areas东北地区城乡初中生学校生活满意度比较研究
18.Comparative study of dissolution on five active components of Fufang Danshen tablets复方丹参片中5种活性成分的溶出度比较
相关短句/例句
ratio activity比活度
1.Microcomputer γ spectrum ratio activity meter;微机γ能谱比活度测量仪
3)137Cs activities137Cs比活度
1.137Cs activities in purple surface soil on grass land have a good relationship with the medium grain size(d50)by sieving method,but do not have a defined relationship with the medium grain size(d50)by normal method.紫色土草地表层土壤的137Cs比活度与样品的筛分中值粒径(d50)相关较好,而与颗分中值粒径没有明显的相关性。
4)Activity ratio活度比
1.such as Oxidationreduction environment of agaifersystem,degree of rock retarding (adsorbing)radionuclides ingroundwater etc according to natural radionuclides activity ratio relative to ￣(222)Rn, retardationfactor,dlstrobution coefficlent and radionuclide concentration in the groundwater.本文通过地下水中天然放射性核素的活度比值、阻滞系数、分配系数以及核素浓度的研究，阐明了含水系统的氧化还原环境，岩石对水中放射性核素的阻滞（吸附）作用等地下水环境问题。
2.The paper introduces the method of dating the zero time by utilizing the activity ratio of two fission products in no-isobaric or parent-daughter fission products in isobaric.文章介绍利用不同质量链上两种裂变产物或同一质量链上母子体裂变产物的活度比来确定CT- BT国际比对样品零时的方法。
5)α-specific activityα比活度
1.The a-specific activity of 234U is about three orders higher than that of 235U.~(234)U的α比活度比~(235)U约高3个数量级,因此,可以根据样品α比活度的增加估计~(235)U的浓缩度。
6)high specific activity高比活度
延伸阅读
高比活度分子式：CAS号：性质：指单位质量的放射源具有较高的放射性活度。通常表示某放射源中稳定同位素或其他物质的含量很少。它能满足示踪实验的要求。在满足一定条件下，反应堆可生产出高比活度放射源。
