您要查找的是不是：
- Applications of nitrogen isotope techniques: The prerequisite analysis of soil organic nitrogen as sources of nitrate contamination of groundwater 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
- USING NITROGEN ISOTOPE TECHNIQUES TO IDENTIFY THE SOURCES OF THE NITRATE CONTAMINATION TO THE GROUNDWATER BENEATH SHIJIAZHUANG CITY 利用氮同位素技术识别石家庄市地下水硝酸盐污染源
- Nitrogen isotopic technique was used to study the situation and seasonal change of nitrogen pollution in inflowing rivers and an outflowing river of Hongfeng Lake in this paper. 利用氮同位素技术对贵州红枫湖各输入、输出河流氮污染状况和季节性变化规律进行了研究,并通过对输入河流和输出河流的氮对比,探讨红枫湖的氮负荷变化。
- nitrogen isotope techniques 氮同位素技术
- In addition, carbon and nitrogen isotope and its ratio was important indicator in the riverine biogeochemistry study. 另外碳氮同位素及其比值在当前的河流有机质生物地球化学研究中仍起着非常重要的示踪作用。
- Yi X F, Li L X, Zhang X A, Zhao L, Li M C.Influence of artificial food on stable carbon and nitrogen isotope composition of Plateau Pikas. 易现峰;李来兴;张晓爱;赵亮;李明财.;人工食物对高原鼠兔稳定性碳和氮同位素组成的影响
- Carbon isotope techniques can be used to study the allocation and turnover of recently photosynthesized C. 植物近期光合C分结构性C和代谢C；
- As an effective tracing method, stable nitrogen isotope is significant for studying the nitrogen cycling, especially for identifying source of nitrogen pollution. 稳定氮同位素作为一种有效的示踪手段，在研究氮循环特别是污染氮源的识别方面有重要意义。
- Stable isotope techniques have been used in a few cases to evaluate possible contribution of fog water to stream flow, plant transpiration, or groundwater recharge. 露水和土壤吸附水的稳定同位素研究是干旱区凝结水研究的重要方向；
- Therefore, stable isotope techniques can be used to measure nutritional parameters in all human populations such as ordinary people, sportsmen and patients. 在动物营养领域，则可以用来测定动物的生长发育和肉蛋产量。此技术已成为人体营养、临床试验和动物营养中不可缺少的基本手段。
- Nitrogen isotope geochemistry in minerals and rocks has not been fully studied,primarily because of very lower(<1000 ppm) concentration of nitrogen in the crustal rocks and the difficulty to extract nitrogen from silicate minerals and rocks. 氮同位素地球化学在固体地球科学研究很少被关注;主要是由于在地壳岩石中氮丰度很低(<1000 ppm)和氮难于从硅酸盐中提取出来。
- New Paleo-tracers and Tracer Calibrations: Nitrogen Isotopes, Silicon Isotopes, ... 17新的古示踪剂和示踪剂校正；氮同位素、矽同位素...
- Base flow separation method and isotope technique were adopted to study the cyclic relationship between river water and groundwater. 通过基流分割计算和同位素技术的应用，研究了区内地下水和地表水之间的水循环规律及地下水对黄河的贡献。
- Stable isotope technique is a new, innovative approach to assess the source and natural attenuation of organic pollutants in environment. 摘要稳定同位素技术是近来发展起来用于识别和评价环境有机污染物来源和降解的新方法。
- Of all kinds of stable isotopes, 15N stable isotope technique plays a very important role in the research on nitrogen cycling in natural ecosystems and is still functioning efficiently now. 其中，稳定性同位素15N自然丰度法近年来在生态系统氮素循环研究中发挥了和正在发挥着极为重要的作用。
- stable carbon isotope techniques 碳稳定同位素技术
- Water isotope technique is an important method in the field of groundwater studies,which can help to explain groundwater activity mechanism from macroscopy and microscopy. 水同位素技术已成为研究地下水的重要手段,有助于从宏观和微观上阐明地下水活动机理。
- In recent years there has been a prosperous application of stable isotope technique, a new method applied in modern ecology research, in many ecological research fields. 稳定性同位素技术是现代生态学研究中的一门新兴技术，在生态学研究的诸多领域都展示了广阔的应用前景。
- Double stable isotope technique, a safety and accurate method todetermine calcium absorption in humans, has been recently applied to evaluatecalcium bioavailability. 双稳定核素示踪技术是一种可以安全、准确地测定人体钙吸收率的方法,近年被逐渐用于评价钙剂生物利用度。
- Air consists chiefly of nitrogen. 空气主要由氮气组成。
