氮同位素

本次研究通过地下水及其潜在补给源的氮同位素和水化学调查，确定和识别石家庄市地下水NO-3污染程度和污染源。

In this study , nitrogen isotopes and hydrochemistry for groundwater and various potential recharge sources were investigated to determine and identify the extent and sources of contamination from NO 3 in the groundwater beneath Shijiazhuang City .

张掖市地下水硝酸盐污染源的氮同位素研究

Studies of Nitrogen Isotopes in Sources of Nitrate Pollution in Groundwater Beneath the City of Zhangye

而侵入岩中的N2含量和氮同位素组成更多地反映了地壳中含氮物质浓度及同位素组成特征。

But for the intrusive rocks , the nitrogen content and isotope compositions better reflect the content and isotope compositions of nitrogen-bearing matter in the crust .

海水中溶解态硝酸盐的氮同位素分析的预处理方法MBR短程硝化反硝化处理高氨氮废水影响因素的研究

Pretreatment Method for Nitrogen Isotopic Analysis of Nitrate in Seawater Study on Short-cut Nitrification Process with MBR and Its Factors under High Ammon in Concentration Condition

海洋悬浮颗粒物中氮同位素的EA-IRMS法测定

Determination of ~ ( 15 ) N in marine suspended particulate matter using EA-IRMS technique

本论文以稳定氮同位素（δ15N）技术为基础，对长江口海域氮的同位素特征及其环境意义进行了研究。

Based on the analysis of stable nitrogen isotope (δ 15N ), variability of nitrogen isotope in the Yangtze River ( Changjiang ) estuary and its environmental implications were studied .

建立了使用元素分析仪-同位素质谱（EA-MS）联用技术测定土壤样品氮同位素比值的方法。

Element analysis isotope mass spectrometry technology was applied to determine nitrogen isotope composition of sample from environmental and geological fields .

与1991年相比，氮同位素组成指示地下水NO-3的主要来源已由当时矿化的土壤有机氮变为现在的动物粪便或污水；

Compared with that in 1991 , nitrogen isotopic compositions indicated that the major sources of NO 3 in groundwater changed from mineralized soil organic nitrogen at that time to animal wastes or sewage at present .

塔里木天然气氮同位素组成与分布

Nitrogen isotopic composition and distribution of natural gases in Tarim Basin

铵含量和氮同位素对成岩成矿环境的示踪

Ammonium Content and Nitrogen Isotope Constraint on Metallogenetic and Diagenetic Environment

塔里木盆地原油氮同位素地球化学初步研究

Elementary research on oil nitrogen isotopic geochemistry in Tarim Basin

氮同位素方法在地下水氮污染源识别中的应用

Identification of the nitrate sources in the groundwater by N isotope method

质谱-元素分析仪技术测定土壤样品氮同位素

Measurement of Nitrogen Isotopic Composition of Soil Samples by Element Analysis-Mass Spectrometry

天然气中氮同位素组成的测定

Method of measurement of nitrogen isotope ratio in natural gas

大气氮同位素质谱分析中干扰因素的研究

Interfering Factors on ￣( 15 ) N Mass Spectrometric Analysis of Atmospheric Nitrogen

氮同位素丰度及其比值的准确测定

Accurate Determination of Isotopic Ratio and Abundance of Nitrogen

贵阳地区夏季雨水硫和氮同位素地球化学特征

Geochemical characteristics of sulfur and nitrogen isotopic compositions in rains of Guiyang in summer

氨的激光复相催化氧化反应和氮同位素的分离

Laser Enhanced Catalytic Oxidation of NH_3 and its Application in Isotope Separation of Nitrogen

地下水硝酸盐氮同位素分析最新方法&细菌反硝化法

Bacterial Denitrification : A New Method for Nitrogen Isotopic Analysis of Nitrate in Groundwater

油藏原油微生物降解的氮同位素分馏效应

Nitrogen Isotopic Fractionation of Crude Oil during Biodegradation

人工食物对高原鼠兔稳定性碳和氮同位素组成的影响

Influence of Artificial Food on Stable Carbon and Nitrogen Isotope Composition of Plateau Pikas

日粮中玉米含量对肉鸡碳·氮同位素组成的影响

Effects of Maize Contents in Ration on Stable Carbon and Nitrogen Isotope Composition of Broilers

地球上氧、氮同位素原子要比太阳风中发现的重得多。

We 've got more of the heavier versions of these atoms than our Sun does .

氮同位素示踪贵州红枫湖河流季节性氮污染

Nitrogen isotope studies on seasonal nitrogen pollution of inflowing rivers of Hongfeng lake , Guizhou Province

长江悬浮颗粒物中稳定碳、氮同位素的季节分布

Seasonal variability of stable carbon and nitrogen isotope of suspended particulate matter in the Changjiang River

我国牧区羊肉中稳定性碳、氮同位素组成特性研究

Study on the Characteristics of Stable Carbon and Nitrogen Isotopes of Mutton from Pastoral Area of China

黄土高原植物与不同粒级中土壤体系氮同位素组成变化及意义

Implications of Stable Nitrogen Isotopic Compositional Variation of Plant and Soil with Different Size Fractions in Loess Plateau

北冰洋西部沉积物有机碳、氮同位素特征及其环境指示意义

Organic carbon and nitrogen isotopes in surface sediments from the western Arctic Ocean and their implications for sedimentary environments

氮同位素技术的应用：土壤有机氮作为地下水硝酸盐污染源的条件分析

Applications of nitrogen isotope techniques : The prerequisite analysis of soil organic nitrogen as sources of nitrate contamination of groundwater

测定土壤氨基糖和氨基酸手性异构体中氮同位素比值的气相色谱/质谱方法

A gc / ms method to assess ~ ( 15 ) n ratios in soil amino sugars and amino acid enantiomers