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It is rich in humus and slightly acid, due to leaching of lime.

富含腐殖质,微酸性,是比较好的农业用土壤。

Formaldehyde is absorbed by an acidic saturated solution of 2,4-dinitrophenyl hydrazine and converted to its hydrazone; the hydrazone is then extracted with CS2 and quantitated by GC.

利用尾气中的甲醛与2,4-二硝基苯肼酸性饱和溶液反应生成甲醛腙的特性,通过检测甲醛腙的浓度来检测尾气中的甲醛含量。

When the solution changed from acidic to basic, the chem. shifts of b-15N atom shifted from 366-380 ppm to ~500 ppm, corresponding to an equilibrium shift from hydrazone form to azo anion structure of the dyes.

当样品溶液从酸性转成碱性,β-氮-15原子的化学位移从366-380PPM移到500PPM,相应于从腺型到偶氮阴离子结构。

The ordered mesoporous material MCM-41 was synthesized by a hydrothermal method using fumed silica,sodium hydroxide/tetraethyl ammonium hydroxide/hydrogen chlorideand cetyl trimethl ammonium bromide.

用X射线衍射、氮气吸附-脱附等手段对比分析了合成的3种MCM-41介孔材料的物相、比表面积、孔径、孔体积等,发现酸性介质中合成的介孔材料的孔径最大。

Contact with acid liberates a highly toxic gas. The inhalation of a very minute amount of hydrogen cyanide can be fatal.

酸性物质接触以后放出高毒性的气体,吸入一定在数分钟内将会死亡。

The amphoteric character of Al2O3/SiO2 can scavenge acidic hydrogen fluoride,which is inevitably present in the LiPF6-based electrolytes us...

膜中Al2O3/SiO2的两性特征,将电解液中的酸性HF消耗掉,而HF作为现在锂离子电池所用电解液中的杂质是不可避免的。

Soil pH measures soil acidity as the logarithm of the activity of the hydrogen ion.

土壤酸性是以土壤pH即H+活度的对数来度量的。

Many reseach works have been done to prepare the intermediates through hydrogenolysis, acidic and basic hydrolysis.

本论文通过大量实验研究碱性水解、酸性水解和氢解法制备ADHPA的合成方法。

The yields were better when DHPCE with nitro group in meta or ortho position of the benzene ring were hydrolyzed in basic conditions, while the hydrogenolysis and acidic reactions gave very poor yields.

当苯环的间位和对位存在硝基,碱性水解时,在二氢吡啶环的3位引入氯乙醇的酯能得到较好的收率;酸性水解和氢解法则不宜用来合成ADHPA。

Mechanism of hydrolysis at acid and basic conditions were discussed respectively.

并分别讨论了在酸性和碱性条件下的水解机理分别进行探讨。

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The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了,排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意,我建议我们在价格上大家各让一半。

After an hour and no pup, look for continued contractions and arching of the back with no pup as a sign of trouble.

一个小时后,并没有任何的PUP ,寻找继续收缩和拱的背面没有任何的PUP作为一个注册的麻烦。