background level

Estimation of natural radiation background level and population dose in China

中国天然辐射本底水平和居民剂量估算

A Study on the Selenium Background Level in the Soils in Guizhou

贵州省土壤硒的背景值研究

It can monitor and record the electrical field signal and background level on site .

可对现场的电信号及背景进行监测和记录。

Investigation and study of the background level of rare earth elements in Henan province 's soils

河南省土壤中稀土元素背景值的调查研究

Exact Measurement of Environmental Radiological Background Level

环境本底辐射水平的准确测量

Determination of the Background Level of Children 's Salivary Lysozyme in Shantou Special Economic Zone

汕头特区儿童唾液溶菌酶背景值测定

The content of 6 kinds of heavy metal elements in vegetables is higher than the background level of vegetables .

本文研究了宝山区菜区蔬菜重金属污染的特点，结果如下：菜区蔬菜六种重金属元素含量一般比背景水平高，蔬菜吸收重金属的能力为：叶菜类>根茎类>茄果类。

The content test and background level of some environmental elements in unpolished rice and wheat grain of Shanghai region

上海地区糙米和麦粒中若干环境元素含量检验及背景水平

Assessment of radiation background level of Shandong basin in east line of northward rerouting of southern river

南水北调东线山东段通水前沿线流域放射性本底水平评价

Even if the immediate health risk is small , bonfires add to the general background level of air pollution .

即使在短时间内没有很大的健康风险，篝火产生的污染也会增加大环境下的空气污染程度。

Survey of the background level of nine elements in rice and wheat in South and North rice regions of Jiangsu Province

江苏省南北稻区稻米和小麦中九种元素背景值的调查研究

This paper completely introduces the investigation of environmental radioactive background level before the commissioning of power plant and environment monitoring system of power plant .

文中较全面地介绍了电站运行前的环境放射性本底水平调查和电站的环境监测系统。

A survey of the background level about uranium , thorium and radium in drinking water and food in Shanghai area

上海地区饮水和食品中铀、钍、镭本底水平的调查

The Research of Environment ( base ) Radioactive Background Level on Gan-Nan Railroad of Jing-Jiu railway

京九线赣南路段环境放射性本底水平的研究

Study on the content and background level of 6 heavey metal elements of rice grain and wheat grain in Baoshan District

宝山区稻麦籽粒中六种重金属元素含量与背景水平的研究

In the experiment , the neutron background level has been studied by using uranium fission chambers and the method of shielding .

实验上采用屏蔽法，用了铀裂变电离室。

The monitoring results show that no noticeable changes have been observed , Ambient γ radiation level remains at the background level basically , after 10 years operation .

KRS系统大量的监测数据及统计分析表明：大亚湾核电站运行十年来，周围环境γ辐射水平基本保持在运行前天然本底的辐射水平，未见有显著性变化。

A study of the allowable limit of selenium in foods & a survey of the background level of selenium in foods in the Chengdu Area

食品中硒允许限量研究&成都市市售粮食、蔬菜和动物性食品中硒含量本底值

The radio-activities in the urine , bile and feces reached to the background level at 120 hours after administration .

染毒后120h，尿、粪、胆汁中放射活性接近本底。

The difference of total zinc concentrations among tea garden soils was not little and all contents of the metal were lower than background level of located areas .

茶园土壤锌的形态分布表明，13个茶园土壤的锌含量略有差异，但均低于茶园所在地区土壤锌的背景含量。

In the course of working , the average microbial content reached 4 000 cfu / m3 which was 3 times as high as the background level .

人员进入后空气中微生物含量明显升高，达到4000cfu/m3，是不工作时的3倍。

Results indicate that the contents of naturally occurring radionuclides in subterranean crops in Lanzhou area have been approximated to the background level .

结果表明：兰州地区块根、块茎类地下作物中天然放射性核素的含量属于本底水平。

Meanwhile in HUVEC cells , SP-Tat-Apoptin remained in the cytoplasm and no induction of apoptosis above the background level was observed .

同时，在HUVEC细胞中，SP-Tat-Apoptin仍停留在胞质中，没有观察到高于基础水平的凋亡被诱导。

For the former , after several decades of Gy irradiation , and about one hour later , its leakage current could be recovered to normal background level ;

前一种在几十Gy照射后一小时，即可恢复到正常本底水平；

The maximum value of annual effective dose is 53 . 8 uSv in 1992 , which is only equal to 9 % of natural background level .

最高年份（1992年）值为53.8μSv，仅为天然本底值的9%。

Most of heavy metals do not exceed the natural background level except Cd and Pb in sediments and Cu , Cd , Hg in soils .

土壤和沉积物中多数重金属元素尚未超过自然背景值，只有沉积物中Cd和Pb，土壤中的Cu、Cd和Hg超过。

This means that the larger the change of Coulomb stress on the neighboring faults , the more time needed for their seismicity to return to the background level .

应力扰动值大的区域，其地震活动率恢复至背景水平所需要的时间也长。

The continues time of increasing is about 6 ~ 12 months and evolution process can be divided into two styles : A. Background level → increasing → tranquil → eruption ;

地震活动增强持续时间约为6～12个月，其演化过程大致可划分为两种类型：A：背景→增强→平静→发震；

Observational dynamic range of station reflects performance of observational instrument and background level of environment disturbance of station base , and effective dynamic range shows the maximal capacity recording seismic signals .

台站的观测动态范围，反映了观测仪器本身的性能和台基环境干扰背景的水平，有效动态范围大小反映记录地震信号的最大能力。

Fourth , the proposed feasibility and limits to supply and demand contradiction and Shanghai as the background level of comprehensive development . In accordance with the differences between different models , separate discussion .

其四，对建议的可行性及限度，以供需矛盾及上海综合发展水平为背景，依照不同模式之间的差异，分别进行的讨论。