氢氧化钠

One of the most wi de ly employed materials of the chemical industry, it is used in manufacturing chlorine, caustic soda, sodium carbonate, bicarbonate of soda, soap, and chlorine bleach, as well as in ceramic glazes, metallurgy, food preservation, curing of hi de s, road de -icing, water softening, photography, and many consumer products, including mineral waters, mouthwashes, and table salt itself.

氯化钠是化学工业最广泛使用的材料之一，用于制造氯、氢氧化钠、碳酸钠、碳酸氢钠、含氯聚合物，另外在陶瓷釉、冶金、食物保存、皮肤消毒、道路除冰、水的软化、照相及许多消费商品、调味用。

Biuret test A test for the presence of proteins, in which sodium bydroxide is added to the test solution, followed by drops of 1% copper sulfate solution.

双缩脲试验：鉴定蛋白质存在的试验。在待检测溶液中加入氢氧化钠，然后滴加1％硫酸铜溶液。

By means of electrochemical measurements,XRD and surface morphology analysis,the influence of saccharin brightener on electroless plating nickel coating was studied.

通过电化学和XRD以及表面形貌分析等方法，研究了光亮剂糖精对化学镀镍层耐腐蚀性能的影响及其机理，结果表明，糖精可以提高化学镀镍层在盐酸、硫酸、氯化钠中的耐蚀性能，但在氢氧化钠中耐腐蚀性能下降

Preparation of Brookite TiO_2 Micro-crystals with Single Phase;2. The brookite TiO2 with different morphologies was prepared by hydrothermal method using TiCl4 and NaOH as the starting material.

以四氯化钛和氢氧化钠为原料制备TiO2前驱体，通过水热法合成了不同形貌板钛矿相TiO2，利用X射线衍射和透射电镜对所得样品进行了表征。

Solution from a 10 mL buret.(tolerance ±0.02 mL). On the lower end of the buret attach

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

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

Some materials were synthesized in this paper at first, 1-nitro-2-pentanol was synthesized with nitromathane and butyraldehyde and the yield was 70.2%; l-nitro-2-pentanol was reduced to 1 -amino-2- pentanol with iron and the yield was 65.2%.

分别用氢氧化钠、三乙胺为缚酸剂，2-氨基-1-丁醇、1-氨基-2-戊醇、环己酮和二氯乙酰氯为原料，采用一步法和分步法合成了两种潜在除草剂安全剂。

Hydroxide and calcium hydroxide the nature of the two.

氢氧化钠和氢氧化钙的性质2。

At the same dosage, alkaline reduction ability of sodium hydroxide is better than calcium hydroxide.

结果表明，甲醛的强碱还原转化主要取决于碱投加量和反应温度，在同样投加量下，氢氧化钠比氢氧化钙对甲醛还原能力稍强。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。