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acid hydrogen
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     Results panaxdiol rates hydrolyzed by hydrochloric acid,hydrogen nitrate and sulfuric acid were 10.15%、8.81%和16.69% at 80℃;
     结果80℃时,盐酸、硫酸和硝酸人参二醇得率分别为10.15%、8.81%和16.69%;
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     New process of preparation of large granule food-class phosphoric acid hydrogen calcium with phosphoric acid and calcium carbonate
     磷酸-碳酸钙法制备大颗粒食品级磷酸氢钙新工艺
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     Results Accuracy of the method is 92%-103% by using the digesting system of nitric acid,hydrogen peroxide solution;
     结果 采用硝酸、双氧水消解体系 ,方法准确度 92 %~ 10 3%;
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     Ferulic acid, hydrogen peroxide and their combination, tea catechin,NaHCO_3 and NaHSO_3 were used to test the destroying capacity for acrylamide under different temperatures.
     探讨了添加剂阿魏酸、过氧化氢、阿魏酸 +过氧化氢、儿茶素、NaHCO3和NaHSO3在不同温度下对丙烯酰胺的脱除作用。
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     The blood glucose in rats were reduced by 30% at 30 min after nasal administration when Tween -80 and Span -80 were added to insulin spray (insuin 3. 2U/50ul, 50ul/rat ),and the nadir decrease rate was 45% at 60 min. On addition of GAHS-Na (glucyrrhetinic acid hydrogen succinate disodium) .
     以吐温—80、司盘—80为助剂的胰岛素三相气雾剂(胰岛素含量3.2U/ul,每次喷量50ul),经鼻腔给药,能明显降低大鼠血糖,30min降低30%以上,于60min达高峰(降45%),且持续2~3h;
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  相似匹配句对
     Progress in preparation of sulfuric acid from hydrogen sulfide
     硫化氢制酸的生产技术进展
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     STUDY ON PHYTIC ACID STABILIZING HYDROGEN PEROXIDE
     植酸稳定双氧水的实验研究
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     METALLIC HYDROGEN
     金属氢
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     Peracetic acid
     过氧乙酸
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     Oleanolic acid
     齐墩果酸
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  acid hydrogen
The kinetic isotope effect KD/KT was measured during acid hydrogen exchange in π-C5H5-(CO)2Fe-σ-CH2C6H5.
      
Kinetic isotope effect during acid hydrogen exchange in σ-benzyl-π-cyclopentadienyliron dicarbonyl
      
Effect of FMI inhibitors on low-cycle corrosion fatigue of steel in acid hydrogen-yielding media
      
Here, the notion that hydration plays a significant role in nucleic acid hydrogen-bond lengths is tested.
      
The main principle is the intercalation of the amino acid and the binding of the aliphatic amino acid hydrogen atoms through hydrogen bonds to the π-electrons of the bases.
      
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We synthesized polynitrobenzenes (trinitro to hexanitro) by oxidation of polynitroanilines by peroxysulfuric acid (hydrogen peroxide dissolved in sulfuric acid, it is also known as Caro's acid) several years ago. In this method, the concentration of peroxysulfuric acid is very important and the content of SO_3 in sulfuric acid plays also an important role. The effects of some reaction conditions are discussed in this paper. Although similar methods have been published in the...

We synthesized polynitrobenzenes (trinitro to hexanitro) by oxidation of polynitroanilines by peroxysulfuric acid (hydrogen peroxide dissolved in sulfuric acid, it is also known as Caro's acid) several years ago. In this method, the concentration of peroxysulfuric acid is very important and the content of SO_3 in sulfuric acid plays also an important role. The effects of some reaction conditions are discussed in this paper. Although similar methods have been published in the literature recently, yet what we have investigated still has some advantages in practice. The hexanitrobenzene can be synthesized in agood yield with much less amount of peroxysulfuric acid and shorter time as compared with the reaction conditions published in the literature.The detonation properties of polytrobenzenes were measured and reported for the first time in the literature. These data show that hexanitrobenzene is an excellent high explosive, but it can be easily hydrolized into trinitrophloroglucinol.

我们曾在若干年前用过硫酸(过氧化氢溶于硫酸中,亦称卡洛氏酸)氧化多硝基苯胺而合成了多硝基苯类(硝基数3至6)。过硫酸的浓度对这个方法非常重要,而硫酸中的SO_3的含量亦起重要作用。本文讨论了一些反应条件的影响。虽然最近文献上发表了一个类似的方法,但我们所研究的方法仍有其优点,与文献所发表的反应条件相比,我们使用的过硫酸量少得多,反应时间短,收率也较高。我们还测定了多硝基苯类的爆轰性质并首次在文献上发表。这些性质说明六硝基苯是一个具有很高能量的炸药,但它易水解而生成三硝基间苯三酚。

A new electrochemical method has been developed for selective etching of semi-insulating QaAs (gallium arsenide) using citric acid-hydrogen peroxide-water system. The effects of electrolyte composition, etching time and current density on the etching rate are studied. The etched surfaces are also examined by SEM. The experimental results show that a smooth surface and flatbottomed holes can be obtained with this method. Based on simple faradic analysis, it is found that the effect of DO current is...

A new electrochemical method has been developed for selective etching of semi-insulating QaAs (gallium arsenide) using citric acid-hydrogen peroxide-water system. The effects of electrolyte composition, etching time and current density on the etching rate are studied. The etched surfaces are also examined by SEM. The experimental results show that a smooth surface and flatbottomed holes can be obtained with this method. Based on simple faradic analysis, it is found that the effect of DO current is to make the surface smooth, but the dissolution mechanism of GaAs in electrochemical etching is, probably, mainly due to chemical reaction.

本文采用柠檬酸-H_2O_2-H_2O体系的电化学腐蚀法,对高阻GaAs衬底材料的选择腐蚀进行了研究.考察了电解液组分、腐蚀时间、电流密度对腐蚀速率的影响,井用扫描电镜法对腐蚀后的表面进行了观察.研究结果表明,该法能获得具有底部平坦表面平正的窗孔.通过简单的法拉第分析可以认为,当用电化学腐蚀时,通电的作用能使表面平正,但GaAs的溶解可能主要靠化学反应.

Total chromium, chromium (Ⅲ) and chromium (Ⅳ) of the ppm or ppb level in alkaline waste water containing sulfur have been determined by by flame atomic absorption spectrometry after preconcentration. The chromium (Ⅲ) can be collected by the ferric hydroxide precipition at pH 9.8, while the chromium (Ⅳ), after reduction to trivalent by ferrous ammonium sulfate, was then collected by ferric hydroxide at pH9.8 too。The precipitates were filtered, and digested with nitric acid-hydrogen peroxide and followed...

Total chromium, chromium (Ⅲ) and chromium (Ⅳ) of the ppm or ppb level in alkaline waste water containing sulfur have been determined by by flame atomic absorption spectrometry after preconcentration. The chromium (Ⅲ) can be collected by the ferric hydroxide precipition at pH 9.8, while the chromium (Ⅳ), after reduction to trivalent by ferrous ammonium sulfate, was then collected by ferric hydroxide at pH9.8 too。The precipitates were filtered, and digested with nitric acid-hydrogen peroxide and followed by AAS determination. The sensitivity of method was 0.11μg/mL 1% absorption. Relative standard deviations are in the range of 1—4% for 11 determination. Both precision and recovery are satisfactory.

本文研究了在PH为9.8左右的条件下,利用Fe(Ⅲ)共沉淀富集分离含硫碱性废水中的Cr(Ⅲ),Cr(Ⅵ)用Fe(Ⅱ)还原至Cr(Ⅲ)后,再用一定量Fe(Ⅲ)共沉淀,用火焰AAS法测定铬的总量与分量。试验结果表明,本法比溶剂萃取等吸光光度法操作简便,试剂成本低,应用范围广。操作中由于共沉淀分离而除去了绝大部分的干扰离子,方法的选择性和精密度都较好,当总铬量为1.30ppm、Cr(Ⅲ)为0.90ppm、Cr(Ⅵ)为0.40ppm时,平行11次测定的变异系数分别为1.09%,1.41%,3.09%。本法还可用于富集分离铬含量在ppb级的各种废水样中的cr(Ⅲ)与Cr(Ⅵ)。

 
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