In the late 19th century scientists diagnosed a shortage of nitrogen as a planet-wide problem.
在19世纪晚期，科学家断定，缺氮将成为一个全球性的问题。
The technique USES hot nitrogen as desorption medium, and recovers the enriched desorption gas in a cooling or absorption manner, thereby realizing zero-release of pollution.
此工艺以热氮气作为解吸介质，富集后的解吸气通过冷凝或吸收方式加以回收，实现污染物零排放。
The content of exchangeable Al increased with the amount of applied nitrogen as urea.
茶园土壤交换性铝含量随施氮量的提高而增加；
Processes that use nitrogen as a liquid do not require the vaporizers and pressure control manifold.
使用液氮的过程不要求有汽化器和压力控制管。
The blood samples of mice were collected for the analysis of glycosylated serum protein and blood urea nitrogen as well as lipid levels.
动物处死后，取血液测定小鼠糖化血清蛋白、尿素氮含量及血脂水平。
Common purity nitrogen as the material, through some special technics, wipe off the oxygen and water in nitrogen, then get high purity nitrogen.
利用普氮为原料，通过一定的特殊工艺的处理，去除普氮中的氧、水等杂质，得到高纯氮气。
Adsorption and separation technology were studied with reforming topped oil as feedstock, 5 a molecular sieve as adsorbent, nitrogen as desorbent.
采用吸附分离工艺，以5A分子筛为吸附剂，氮气为脱附剂，将重整拔头油分离成高纯度的正构烷烃和异构烷烃。
The increase in the MPP of nitrogen as potash application levels are increased is an indication of the positive impact that potash has on the effectiveness of nitrogen.
氮肥的边际产量随着钾肥用量的增加而增加的现象说明，钾肥对氮肥施用的有效性具有积极的作用。
With the rapeseed meals as raw material, peptide recovery ratio, soluble nitrogen and amino acid nitrogen as the indexes, the craft that rapeseed peptide was produced with Bacillus.
以菜籽粕为原料，肽得率、氮溶解指数和氨基酸态氮为指标，通过单因素实验及中心组合实验设计探讨了枯草芽孢杆菌固态发酵生产菜籽肽的工艺条件。
Seriously undervalued Swedish apothecary and chemist who was the actual discoverer of oxygen and nitrogen as well as of the elements arsenic, barium, chlorine, manganese, and molybdenum.
受到严重轻视的瑞典药剂师、化学家。他是氧气和氮气同时也是砷、钡、氯、锰和钼元素的真正发现者。
Cracking natural gas with thermal plasma is one of the technical tools to convert natural gas efficiently. With nitrogen as the working gas, the main products include acetylene, ethylene and hydrogen.
热等离子体裂解天然气是可以高效转化天然气的技术手段之一，当以氮气为工作气体时主要产物有乙炔、乙烯、氢气。
Nitrogen as a plant nutrient is treated in a great number of publications.
人们对植物营养中的氮素研究已发表相当大量的报告。
Nitrogen as a plant nutrient is treated in a great number of publications.
人们对植物营养中的氮素研究已发表相当大量的报告。
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