查询词典 burette

The effects of acidity, reaction temperature, feeding mode, and rotational speed of the stirrer on the particle size of AC blowing agent were studied. The optimal conditions were obtained as follows: the catalyst composed with m:m(V2O5)=1:1 equal to 1%-2% ratio of the reagent''s mass,reagent reacts at 50℃ under pH=3-4 for 25min with 350～360r/min of the stirrer speed, and the NaClO3 solution must be added from burette.

研究了酸度、反应温度、加料方式、搅拌器的转速对AC发泡剂粒径的影响，最佳工艺条件为：催化剂m：m(V2O5)=1：1的质量约为反应物质量的1%~2%，反应体系的pH值3～4，反应温度控制在50℃左右，氯酸钠溶液(质量分数20%)采用通管滴加的方法加入，整个反应时间约为25min，搅拌器的转速一般控制在350～360r/min。

After cleaning skin with face cream, dorp proper essence on cotton bud with burette, then coating on acne cyst with the cotton swab, and gently press 1 to 2 minuts, making effective ingredients permeate into the skin.

洁面后，用滴管往棉签上滴适量的精华液，用棉签涂于痘痘及痘印处，并轻压1-2分钟，使有效成分渗入皮下，轻微者每天1 - 2次，严重者每天3 - 4次。

Fourth, glass products: The main Deputy North glassy, glassy-day, Shu-glass products, such as the proportion of dollars, jars,, flask, acid-base type burette, pipette calibration, single-standard pipette, graduated cylinder, cup, dish, surface plate, funnel and funnel rack, test tube holder, test tube brushes, crucible, magnetic mortars, alcohol lamps, laboratory supplies, such as asbestos network.

四、玻璃制品：主要代理北玻、天玻、蜀玻产品，如比重计、广口瓶、容量瓶、三角瓶、酸碱式滴定管、刻度吸管、单标吸管、量筒、量杯、培养皿、表面皿、漏斗及漏斗架、试管夹、试管刷、坩埚、磁研钵、酒精灯、石棉网等实验室用品。

The titration of the sodium hydrogen carbonate content in medicinal sodium bicarbonate tablet was compared with microburette under syringe control made on our own with conventional burette.

药用小苏打片中NaHCO3的微型滴定分析杨左海（咸宁医学院化学教研室湖北437100关键词小苏打片碳酸氢钠微型滴定法常规滴定法中图分类号O655.22小苏打片为NaHCO3加淀粉等压制而成，用于碱化尿液及酸血症，也可用于胃酸过多。

The invention provides a method for preparing a tube-shaped cathode of a direct methanol fuel cell, belonging to the fuel cell field and comprising the steps of: dispensing a single solution for gel injection molding at first, then adding a mesophase bituminous coal micro ball into the single solution and stirring evenly to obtain stable slurry, then casting the slurry into a die, preserving heat until the single solution reacts with a cross-linker completely to obtain a carbon-biscuit, after drying and sintering the biscuit in vacuum, preparing a diffusion layer and a catalyst layer on the surface by dipping process, and then coating polyester electrolyte membrane with a burette, rolling the carbon on a warm table to solidify the electrolyte membrane.

一种制备直接醇燃料电池管状阴极的方法，属于燃料电池领域。本发明首先配制凝胶注模用单体溶液，之后将中间相沥青炭微球加入到单体溶液中，搅拌均匀得到稳定的浆料，然后将浆料浇注到模具中，保温至单体与交联剂完全反应，得到炭管素坯，将素坯烘干、真空烧结后，在其表面采用浸渍工艺制备扩散层、催化剂层，然后采用滴管涂覆聚合物电解质膜，在加热台上对炭管进行滚压，使电解质膜固化。

The weight variation,resolving time and grain roundness were used as criteria in the best dripping condition.results the optimum dripping condition was as the follows:the temperature was 90℃,the internal diameter of burette was 4.5 mm,dripping speed was 50 drops per minute,and dripping distance was 6 cm.conclusion the moulding technics are feasible and in accordance with the quality standards of total salvianolic acid dripping pills.

结果 最佳工艺条件为：药液温度90 ℃，滴头内径4.5 mm，滴距6 cm，滴速50滴/min。结论确立的成型工艺可行，所制滴丸符合质量标准。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。