查询词典 hydroxide

A method for determination of basic nitrogen-containing compounds in mainstream smoke was established. In the condition of basic substance barium hydroxide powder and extractant chloroform, 18 basic nitrogen-containing compounds were analyzed by gas chromatography-selective ion monitored-mass spectrometry, such as pyridine, 2-methylpyridine, 2-methylpyrazine, quinoline and indole, etc.

在氢氧化钡碱性环境中，以三氯甲烷为萃取剂，采用气相色谱－选择离子监测－质谱法测定吡啶、2-甲基吡啶、2-甲基吡嗪、喹啉、吲哚等18种碱性含氮化合物。

Spent solutions were finally drained into a mixing trough forneutralization, and subsequently, calcium or barium hydroxide and flocculant were added. Precipitate producedsuch as calcium or barium sulfate, calcium fluoride were separated, and recovered water was obtained after pu-rified by ion-exchange column.

分析了铝合金生产工艺中各步骤的化学成分，根据分析结果将常温脱脂、碱蚀、出光、阳极氧化和封孔等不满足生产要求的溶液排放至混合槽内进行中和，再加入氢氧化钠和絮凝剂分离沉淀后，经离子交换柱，得到的回收水可返回生产槽重复使用。

The calcium hydroxide cement containing BEMA or EMA and HEMA as resin matrix has good properties. The pulp capping test showed that an ex...

以BEMA或EMA和HEMA为树脂基体材料，凝固后具较好的整体性能，在狗牙上盖髓70天后，可见牙髓组织内形成完整的牙本质桥，显示出良好的盖髓效果。

Chromium hydroxide is bright green pigment prepared by the calcination of a bichromate with boric acid at 500'C.

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The main products are sodium bichromate, chromium hydroxide,chromic anhydride, chrome oxide green, basic chrome sulfate , potassium dichromate etc. Tested by the authoritative organization, all the products meet with the standard of GB.

主导产品有重铬酸钠、铬酸酐、氧化铬绿、碱式硫酸铬、氢氧化铬等，产品经国家化学产品监督检验部门年检、统检、抽检，均优于国家标准规定的优级品、一级品、合格品质量等级指标。

The research indicated that the magnesium hydroxide has the verystrong adsorption to sea water boride. the solution pH influence the adsorption process obviously.

研究表明，氢氧化镁对海水中的硼化物有很强的吸附作用，溶液的pH值对吸附过程影响明显。

This article has conducted the key research to the characteristic of boron adsorption on magnesium hydroxide.

本文重点研究了氢氧化镁吸附硼的特性。

Add 1 drop of phenolphthalein* indicator and titrate with the sodium hydroxide solution from a 10 mL buret.(tolerance ±0.02 mL). On the lower end of the buret attacha disposable 1-200 L plastic tip.

加入1滴酚酞*指示剂，用装在10 mL滴定管的氢氧化钠溶液滴定(公差±0.02 mL)在滴定管的末端附加一个即用即弃的1-200 L 的塑胶头。

Add 1 drop of phenolphthalein* indicator and titrate using a 10 mL buret filled with standardized 0.05 M sodium hydroxide solution (available from the automatic buret, record the actual concentration). Attach a plastic tip to the end

加1滴酚酞*指示剂，然后用刻度为10 mL的，已充满0.05M标准氢氧化钠溶液的滴定管进行滴定(也可以用自动滴定管，记录实际的浓度)在滴定管的未端装上一个塑料尖嘴plastic

The most important include calcium oxide, calcium hydroxide, calcite and dolomite.

其中最重要的有氧化钙、氢氧化钙、方解石和白云石。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。