查询词典 nitrogen

During the fracturing for low pressure and low permeability gas reservoirs, there are some main problems in conventional hydroxypropylguar - organic boron cross-linking system: Firstly, the water-lock damage to low pressure and low permeability gas formations by filter liquor; Secondly, the reason for alkali-sensitive damage in alkali-sensitive reservoirs is that conventional hydroxypropylguar - organic boron cross-linking fracturing fluids were cross-linked under alkaline environment, while the permeability of reservoirs is reduced greatly; Thirdly, the formation pressure is low, and the energy of flow back is not enough, at present, the main measure in oil fields is "injecting with liquid nitrogen", but this technique increased the cost of fracturing, making great troubles in operating, and leaving the liquid nitrogen also is a big problem.

在低压低渗透气藏的压裂改造过程中，常规羟丙基胍胶-有机硼交联压裂液体系存在的主要问题，一是压裂液滤液对低压低渗透气层造成的水锁损害；二是常规羟丙基胍胶-有机硼压裂液是在碱性条件下交联的，对碱敏性储层造成碱敏损害，降低储层渗流能力；三是地层压力低，压裂液返排能量不足，当前各油田采取的措施主要是&液氮伴注&技术，但是&液氮伴注&技术增加了压裂的费用，而且液氮存放也存在较大问题。

See from the physiological index:All the tomatoes seedlings,Which have Solution culture Lacks of nitrogen , phosphorus , potassium and iron,It's Chlorophyll content、soluble sugar content、proteid content、nitrate reductase activity are all less than that have fully solution culture,These results indicate that nitrogen , phosphorus , potassium and iron have grave implications for plant growth.

从各生理指标来看：叶绿素含量、可溶性糖含量、蛋白质含量、硝酸还原酶活性，缺氮、缺钾、缺铁、缺磷培养的番茄幼苗均低于完全液培养的。以上结果表明缺氮、缺磷、缺钾、缺铁对植物生长有严重的影响。

Microbial biomass carbon and microbial biomass nitrogen, respiration CO2 and mineralized nitrogen in plant straw fertilized soil were determined under laboratory incubation conditions of constant temperature and moisture based on field above- ground yields of intercropped sweet maize straw and white clover straw.

根据田间甜玉米／白三叶草套种各作物的秸秆产量，在恒温恒湿条件下进行室内培养，探讨秸秆不同方式还田后土壤微生物量碳、微生物量氮、呼吸产生的CO2和矿化产生的无机氮的变化规律。

Trees have adsorption, absorption of pollutants or impede the spread of pollutants, trees absorb SO2, nitrogen oxide, hydrogen nitrogen compounds, Cl, fluorine compounds and Hg, Cr, and other heavy metals.

树木具有吸附、吸收污染物或阻碍污染物扩散的作用，树木吸收SO2、氮氧化合物、氮氢化合物、Cl、氟化合物和Hg、Cr等重金属。

Product purpose:(1) calcium carbide (CaC2), organic synthesis of the basic raw materials, Cyanamid, chlor-alkali products, the main raw materials;(2) polyvinyl chloride, used for light industry, construction materials, agriculture, packaging, medicine , electronic equipment, cars, daily necessities;(3) caustic soda, used in paper making, leather processing and textiles;(4) hydrochloric acid, used in paper making, cleaning, rare earth, organic chemical raw materials, fuel , food leather, metallurgy and other industries;(5) lime nitrogen (CaCN2), used in the manufacture of containers of cyanide, cyanides, alkaline drug fertilizer, lime nitrogen particles, soil particles slow-release fertilizer to improve the main raw material;(6) double Cyanamid (H2CN2 2, melamine in raw materials, synthetic pharmaceuticals, dyes intermediates.

产品用途：（1）电石（CaC2），有机合成的基本原料，氰胺、氯碱类产品的主原料；（2）聚氯乙烯，用于轻工业、建筑材料、农业、包装、医药、电子设备、汽车、日用品；（3）烧碱，用于造纸、皮革加工和纺织业；（4）盐酸，用于造纸、清洗、稀土、有机化工原料、燃料、食品皮革、冶金等行业；（5）石灰氮（CaCN2），用于制造氰容器、氰化物、碱性药肥、颗粒石灰氮、土壤改良型缓释颗粒肥的主要原料；（6）双氰胺(H2CN22 ，三聚氰胺的原料，是合成医药、染料的中间体。

Maar lake are on the chlorophyll content and total phosphorus content of the monthly average for the positive correlation with inorganic nitrogen content are on a negative correlation with total nitrogen, inorganic phosphorus content of the monthly average no significant correlation.

玛珥湖中的叶绿素月均含量与总磷月均含量为正相关性，与无机氮月均含量为负相关性，而与总氮，无机磷月均含量相关性不显著。

The matter is degraded under high temperature, and then they can oxide mercury and selectively reduce nitrogen oxide into innocuous nitrogen; smoke gas is treated in desulfurization unit to absorb bivalent mercury and sulfur dioxide.

这些物质在高温烟气中分解后，能够将烟气中的单质汞氧化并将氮氧化物选择性还原为无害的氮气，烟气再经脱硫装置处理，将其中的二价汞和二氧化硫同时吸收净化。

The invention relates to a method for cleaning mercury and nitrogen oxide in fire coal smoke gas, employing specific chemical matter as additive to be added into high-heat smoke gas in furnace, said chemical matter selectively reducing nitrogen oxide and oxiding mercury into bivalent mercury.

本发明涉及一种燃煤烟气中单质汞与氮氧化物的同时净化方法，采用特定的化学物质作为添加物加到锅炉的高温烟气中，通过该化学物质对烟气中的氮氧化物进行选择性还原，同时将单质汞氧化成二价汞。

The primary objective of this study was to explore the optimum wavebands,vegetation indices and quantitative models for estimating leaf nitrogen content in wheat by precise analysis on canopy hyperspectral information in relation to leaf nitrogen status.

本文旨在通过对高光谱信息的精细分析和信息提取，探索建立小麦叶片氮含量(LNC，leaf nitrogen content)估算的最佳波段、光谱参数及监测模型。

The strain can grow on the carbon source glucose or soluble starch and the nitrogen source peptone or soybean powder, but not on the inorganic nitrogen source ammonium chloride or ammonium sulfate.

该菌株能利用碳源葡萄糖和可溶性淀粉；能利用氮源蛋白胨，黄豆粉等，不能利用无机氮源NH_4Cl和(NH_4)_2SO_4。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。