二钠的

The precursor of sodium titanate nanotubes is prepared by: reacting titanium dioxide, metatitanic acid or titanate ester in 20-80 wt.% NaOH aqueous solution at 100-140 deg.C for 12-72 h, washing with water, filtering and drying.

用于反应的前驱体纳米管钛酸钠由二氧化钛、偏钛酸或钛酸酯与20-80wt％NaOH水溶液在100-140℃反应12-72h后用水洗去NaOH，过滤、干燥制成。

is that zinc acetate, sodium acetate and transition metal salt are dissolved in ethylene glycol monomethyl ether as precursor; then ethanol is added as stabilizer; after stirring, the stable sol is formed.

将醋酸锌、醋酸钠和过渡金属盐作为前驱物，溶于乙二醇甲醚中，并加入乙醇胺作为稳定剂，搅拌后形成稳定的溶胶。

Methods Based on molecular assembly technique, the matrix of agarose gel was deposited on the surface of glass plates,followed by drying, oxidation with NaIO 4 and cross linking with glutaraldehyde.

利用分子组装技术，以琼脂糖凝胶为基质，于玻片表面制成自组装膜，经过碘酸钠氧化后再与戊二醛分子偶联，而成为具有双功能分子层的薄膜。

A new catalytic spectrophotometry was established for the determination of trace silver based on the catalytic effect of Ag on the oxidational discoloration reaction of methyl violet with potassium persulfate in buffer medium of HAc-NaAc including phenothroline as activator.

在醋酸－醋酸钠缓冲介质中，有活化剂邻二氮菲存在时，Ag对过硫酸钾氧化甲基紫褪色反应有催化作用，建立了测定痕量银的新催化光度法。

Mainly engaged in sodium azide, barium azide, three phosphorus nitride Friday, phenyl isothiocyanate, 1 - phenyl -5 - mercapto-tetrazole, 4 - dimethylamino-pyridine, 2 - mercapto--5 -- methyl-1,3,4 thiadiazole, N-hydroxy phthalimide, anhydrous betaine and betaine hydrochloride, such as fine chemical raw materials and medicine, pesticide intermediates of the development, production and sales.

主要从事叠氮化钠，叠氮化钡，五氮化三磷，异硫氰酸苯酯，1-苯基-5-巯基四氮唑，4-二甲氨基吡啶，2-巯基-5-甲基-1，3，4噻二唑，N-羟基邻苯二甲酰亚胺，无水甜菜碱及甜菜碱盐酸盐等精细化工原料及医药、农药中间体的开发、生产和销售。

In the present paper,the use of 8-hydroxyquinolinecomplexs in precipitate flotation to separate and preconcentrate Cu and Mn,using SDBS as collector,followed by AAS spectrophotometric determination is proposed.

提出了以8-羟基喹啉为沉淀剂，十二烷基苯磺酸钠为浮选剂，沉淀浮选预分离富集与火焰原子吸收光谱法联用测定痕量Cu和Mn的新方法。

Propargyl alcohol was protected by dihydrophran with the catalysis of PPTS ,and then reacted with Ethyl Mag bromide to prepare its corresponding Grignard reagent.

炔丙醇在 PPTS 催化下由二氢吡喃保护，与溴乙烷格氏试剂反应生成相应的格氏试剂，然后与氯甲酸甲酯反应得到羟基丁炔酸甲酯四氢吡喃醚，在 PPTS 催化下脱保护后进行甲磺酰化，由溴化钠进行溴取代后合成了4-溴-2-丁炔酸甲酯，总收率达53%。

The results indicate the activities of gsh-px, mn-sod, cu, zn-sod, gsh, aldosterone, atrial natriuretic factor in most of rubia cordifolia l groups are higher and the content of mda and serum cortisol is lower.

结果：茜草可增加耐力运动后再力竭即刻状态下谷光甘肽过氧化物酶、锰超氧化物歧化酶、铜、锌超氧化物歧化酶、还原性谷胱甘肽活性以及醛固酮和心钠素的含量；降低丙二醛和皮质醇含量。

The results indicated that with this new adsorbent the efficiency of decolourisation was 85.3％and the productivity of sebacic acid was 92.0％ under the condition of 2％ of adsorbent amount used with 30min of reaction time at 90℃.

本文采用以凹凸棒石粘土为主的新型吸附剂对癸二酸单钠盐溶液脱色。

Ingredients: Water, Cetyl Alcohol, Propylene Glycol, Sodium Lauryl Sulfate, Stearyl Alcohol, Methylparaben, Propylparaben, Butylparaben.

它非常轻柔，可以用来清洗婴儿的娇嫩皮肤水，十六醇，丙二醇，硫酸月桂酰钠，硬脂醇，对羟基苯甲酸甲酯，丙对苯，羟苯丁酯

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。