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低硝酸
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  “低硝酸”译为未确定词的双语例句
     A Q uantitative Study on Chemical Polishing with Low Nitric Acid Content for Copper
     紫铜低硝酸化学抛光的定量研究
短句来源
     An etching process at room temperature with a bath of nitric acid 5% (V/V), sulfuric acid 25% (V/V) and JS-2 as brightening agent is recommended.
     本文提出了以JS-2光亮剂、低硝酸5%(V/V)与硫酸25%(V/V)组成的常温光亮浸蚀工艺。
短句来源
     Study of Bright Etehing of Al and Its Alloys with Low-nitric Acid Composition
     铝及铝合金的低硝酸光亮浸蚀的研究
短句来源
     5、Without other nutrients, the addition of different concentrations of nitrate has little effect on the growth rate of 3 HAB algae.
     5、在不添加其他营养盐的前提下,不同硝酸氮浓度对3种赤潮藻的生长速率几乎没有影响; 在添加营养盐的情况下,与其他几种营养因子相比,不同硝酸氮浓度对3种赤潮藻静止期生物量有很大的影响,在较高硝酸氮浓度下,3种赤潮藻在静止期的最高浓度明显高于低硝酸氮浓度时的浓度。
短句来源
     At low HNO 3 concentration and dilution factor above 2, 0.1 mol/L DCH18C6/1 octanol extracts very little americium,plutonium and uranium. The distribution ratios of Am、Pu and U increase with the increase of HNO 3 concentration in aqueous phase,and decrease with increasing of dilution factor of HLLW.
     研究结果表明,在低硝酸浓度和较大稀释倍数情况下,DCH18C6 对镅、钚、铀的萃取分配比都比较小,并随着水相硝酸浓度的增大而增大,随着模拟高放废液稀释倍数的增大而减小;
短句来源
  相似匹配句对
     THE PREPARATION AND CHARACTERIZATION OF GADOLINIUM NITRATE LOWER HYDRATES
     硝酸水合物的制备及表征
短句来源
     Study of Bright Etehing of Al and Its Alloys with Low-nitric Acid Composition
     铝及铝合金的硝酸光亮浸蚀的研究
短句来源
     Their specific properties are described in some detail: high surface activity and low critical micelle concentration;
     临界胶束浓度;
短句来源
     low social status;
     社会地位;
短句来源
     Preparation of micronazole nitrate gel
     硝酸咪康唑凝胶剂的研制
短句来源
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With UV light mutagenisis and chlorate screening, a nitrate reductase-less mutant cell line was obtained. The nitrate reductase activity in the mutant cell line was only about 1/5 as the normal type. The test for chlorate resistance showed that the mutant cells grew well on the medium containing 60 mM KClO_3, whereas the normal type of cells died under the same condition. The mutant ceils grew better than the normal type on the medium with (NH_4)_2SO_4 as sole nitrogen source, however, they grew less well on...

With UV light mutagenisis and chlorate screening, a nitrate reductase-less mutant cell line was obtained. The nitrate reductase activity in the mutant cell line was only about 1/5 as the normal type. The test for chlorate resistance showed that the mutant cells grew well on the medium containing 60 mM KClO_3, whereas the normal type of cells died under the same condition. The mutant ceils grew better than the normal type on the medium with (NH_4)_2SO_4 as sole nitrogen source, however, they grew less well on the medium with nitrate as sole nitrogen source. The electrophoresis pattern of proteins from the mutant cell line was quite different from that of the normal type. These characteristics remained stable after the callus was cultured on the medium without selective pressure for 2 years. It is suggested that this cell line is a genetic variant.

经紫外诱变氯酸钾筛选,得到一个低硝酸还原酶(NADH:硝酸氧化还原酶.EC1.6.6.1.,以下简写为NR)活力的细胞株。其主要特征:NR活力低,约为正常型的1/5;对氯酸钾具有较强的抗性;不适合在单纯以硝酸盐为氮源的培养基上生长,能在以(NH_4)_2SO_4为唯一氮源的培养基上生长。蛋白电泳表明,此细胞株与正常型有不同的蛋白带。这些特征在没有选择压力的培养基上培养二年后,仍保持不变,说明此细胞株是一个遗传型的变异株。

An etching process at room temperature with a bath of nitric acid 5% (V/V), sulfuric acid 25% (V/V) and JS-2 as brightening agent is recommended. It is suitable for bright dipping commercial pure Al and hard Al alloys after degreasing or alkaline etching, resulting in a brightness not less than that by traditional 50%HNO_3 (V/V) bright dipping process. Besides, more economic and environmental benefits are obtained. Selection of brightening agents and etchants, mechanism, solution composition and operating conditions...

An etching process at room temperature with a bath of nitric acid 5% (V/V), sulfuric acid 25% (V/V) and JS-2 as brightening agent is recommended. It is suitable for bright dipping commercial pure Al and hard Al alloys after degreasing or alkaline etching, resulting in a brightness not less than that by traditional 50%HNO_3 (V/V) bright dipping process. Besides, more economic and environmental benefits are obtained. Selection of brightening agents and etchants, mechanism, solution composition and operating conditions are also described. (p. 15—18)

本文提出了以JS-2光亮剂、低硝酸5%(V/V)与硫酸25%(V/V)组成的常温光亮浸蚀工艺。该工艺适用于经过碱浸蚀或非腐蚀性除油之后的硬铅合金或工业纯铝的光亮浸蚀。实验表明,用该工艺浸蚀制品的光亮度达到或优于传统的50%(V/V)硝酸工艺水平,且有较好的经济与环境效益。本文对光亮剂、浸蚀剂的选择及作用机理、配方的组成及操作条件等方面作了叙述。

he changes in physical chemical properties of pyrite mechanically activated in a vibra-tion mill were studied.The exothermic effect on the DTA curve for non-activated pyrite inair is correspondent to the oxidation of pyrite to sulphate。In comparison to non-activatedsample,the temperature for exothermic effect decrease with incresing activation time。In ad-dition,two new exothermic effects appear on the DTA curves for activated samples。X-rayanalysis declares that the lattice constant increase from 5.4174 to 5.4244...

he changes in physical chemical properties of pyrite mechanically activated in a vibra-tion mill were studied.The exothermic effect on the DTA curve for non-activated pyrite inair is correspondent to the oxidation of pyrite to sulphate。In comparison to non-activatedsample,the temperature for exothermic effect decrease with incresing activation time。In ad-dition,two new exothermic effects appear on the DTA curves for activated samples。X-rayanalysis declares that the lattice constant increase from 5.4174 to 5.4244 after mechan-icallv activated for 40 min。Mechanical activation has greatly enhanced the leaching processof pyrite in nitric acid. The activation energy decreases from 69 kJ/mol to 48 kJ/mol afteractivation。 The leaching rate becomes less dependent on temperature。

研究了黄铁矿在振动磨中机械活化后的物理化学性质变化。黄铁矿经机械活化后,其DTA曲线上氧化放热岭的峰位前移,并且出现了两个新的放热峰,这两个新峰的强度随着活几时间的延长而不断增加;机械活化后,黄铁矿的晶格常数增加;机械活化还使黄铁矿与硝醚的反应能力增强,可以在低的硝酸浓度、低的浸出温度和短的浸出时间下得到高的浸出率。经振动磨活化40min,黄铁矿与硝酸反应的活化能就可由未活化时的69KJ/mol降至活化后的48KJ/mol。

 
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