查询词典 nitrate

The mixed solution of sodium nitrate and aluminium nitrate is added to thequartz raw materials, and then the mixture, is.

在石英玻璃原料中加入一定浓度的硝酸钠和硝酸铝混合溶液，进行高温处理，使石英中杂质转变成易溶于混合酸或水的物质，实现了杂质与石英基体的分离，从而达到用低纯度的石英原矿生产高纯度的石英玻璃原料的目的。

The SiO2-Al2O3-d catalyst was modified with different metal nitrates. It indicates that cadmium nitrate and strontium nitrate could improve the catalytic activity obviously.

用不同种类、不同浓度的金属硝酸盐，对SiO2-Al2O3-d催化剂进行改性研究，发现Cd(NO3)2和Sr(NO3)2改性后，活性和使用寿命较SiO2-Al2O3-d有所提高，而Mg(NO3)2、Ca(NO3)2、Ni(NO3)2改性后的催化剂，活性反而有所降低。

First, dissolving inorganic salts, strontium nitrate, bismuth nitrate and fluorine tantalum acid were chosen to substitute for the traditional metal organic salts as precursor to prepare SrBi〓Ta〓O〓 thin films.

本文首先选用可溶性无机盐原料替代传统的金属有机物盐类作SrBi〓Ta〓0〓薄膜的前驱体。

The results indicated that with the increasing of storage time, the leaves etiolated, contents of crude-fiber increased, while vitamin C, chlorogenic acid decreased, nitrate contents up to the maximum at the 3th day after storage , then decreased gradually. Stored at 2℃, the contents of chlorophyll, vitamin C, chlorogenic acid were higher, nitrate and crude-fiber contents were lower. The lower of membrane permeability and MDA content, the higher activity of SOD significantly delayed senescence process and prolonged storage life of Taraxacum mongolicum.

结果表明：采后蒲公英随着贮藏天数的增加，叶片逐渐黄化，粗纤维的含量升高，维生素C和绿原酸含量下降，硝酸盐含量先升高后降低；2℃下贮藏能够使采后蒲公英具有较高的叶绿素、维生素C、绿原酸，较低的硝酸盐和粗纤维含量，较低的细胞膜渗透率、MDA含量和较高的SOD活性，显著地延缓其衰老进程，延长贮藏寿命。

Methods After extracting the samples, the reaction between thymol and nitrate produced nitrothymol in the presence of sulphuric acid; then nitrothymol was made to react with sodium hydroxide; determination was made on the concentration of nitrate by spectrophotometry at 412 nm.

样品经提取，其中的硝酸盐在硫酸酸性条件下，与麝香草酚生成硝基化合物，再与氢氧化钠作用，生成黄色化合物，在波长412nm处用分光光度法测定食品中硝酸盐含量。

These results indicated that the increasing of the nitrate reductase activity stimulated flower-bud to pass during physiological and moephological differentiation stage. The decreasing of nitrate reductase activity and the increasing of ammoniacal nitrogen content stimulated the plants to blossom.

表明硝酸还原酶活性在花芽生理分化期至形态分化期的升高有利于促进花芽的转化和形成；形态分化后期至初花期，硝酸还原酶活性的下降，氨态氮含量的上升有利于促进开花。

To the most suitable nitrogen source for the growth of black spot disease of Araliaceae was the complete protein peptone which was stronger than comparison, glutanic acid, asparagine,alanin, potassium nitrate, nitrate of soda, ammonium sulfate, ammonia water, ammonium chloride.

对刺五加黑斑病菌最适合生长的氮源为完全蛋白胨强于对照，强于谷氨酸，强于天门冬酰胺，强于丙氨酸，强于硝酸钾，强于硝酸钠，强于硫酸铵，强于氨水，强于氯化铵。

Assimilatory nitrate reductase is a soluble, multiple center redox enzyme that catalyses the two-electron reduction of nitrate to nitrite using pyridine nucleotide as a electron donor.

植物中的硝酸盐还原酶(nitrate reductase，NR)作为限速酶，催化硝酸盐还原为亚硝酸盐，这一过程在氮代谢中处于关键地位，对植物生长发育、产量形成有重要影响。

Based on traditional technology of light alkaline bydrolysis,sodium hydroxide and sodium chloride in original technology will be replaced by potassium hydroxide and potassium nitrate differently.Extraction of fish oil is done in the temperature of 65℃,70℃, 75℃,80℃,85℃,90℃and95℃ in turn in the condition of pH8.0,55mins in hydrolyzing,20mins in salting out with 4.5 percent of potassium nitrate and 30mins in centrifugalization with 3000r/min.

在传统淡碱水解工艺的基础上，将氢氧化钾和硝酸钾分别替换原工艺中的氢氧化钠和氯化钠，在pH8.0、水解时间55min、用4.5%的硝酸钾盐析30min、用3000转的离心机离心30min的条件下，分别在65℃、70℃、75℃、80℃、85℃、90℃、95℃时提取粗鱼油。

The results showed that NO level and NOS activity was significantly increased in rat liver,kidney,heart and muscle after recurrent administration intraperitoneal of 50mg/kg cerous nitrate,at the same time,NO level was increased in rat liver and kidney after administration of 1mg/kg cerous nitrate.

结果显示，腹腔注射高浓度的稀土后，大鼠肝脏、心脏、肾脏、骨骼肌中一氧化氮、一氧化氮合成酶的水平明显增加，注射低浓度的稀土后，肝脏、肾脏内一氧化氮的量显著增加。

We have limited budget let me know if you can do this competitively.

我们有限的预算让我知道如果你能做到这一点竞争力。

We don't know how other critters breathe--lizards, for example.

我们还不知道诸如蜥蜴之类的动物如何呼吸。