查询词典 acid

The major bioactive components in a Chinese herb named Polygonum perfoliatum L. including ferulic acid, vanillic acid, quercetin, caffeic acid and protocatechuic acid were simultaneously determined by capillary electrophoresis with electrochemical detection in this paper.

采用毛细管电泳-电化学检测法同时分离测定了中药杠板归中的阿魏酸、香草酸、槲皮素、咖啡酸、原儿茶酸等主要生物活性成分的含量。

Catalytic synthesis of ethyl chloroacetate with phospho-molybdic acid ;2. The capsaicin in the sample was alkalized with NaOH solution and mixed with phosphotungstic acid and phospho-molybdic acid , the blue heteropoly acid salt has characteristic absorption at 660 nm.

对以辣椒碱为单剂和复配剂制成生物农药中辣椒碱总量的测定条件研究结果表明，含有辣椒碱的生物农药试料，辣椒碱在碱性溶液中与磷钨酸-磷钼酸作用，生成蓝色的磷钨酸–磷钼酸杂多酸盐，在660nm有最大吸收，其吸光度与溶液中辣椒碱的含量成正比。

GB2760-86》issued by Public Health Ministry,phytic acid is suitable to bepreservative agent used tor aquatic products,e.g,prawn freezing preservative agent is 0.05%-0.1% phytic acid solution.In Japan,0.1-0.5% phytic acid is added to shellfish cans to prevent discolouring.Under 100℃F,adding 0.3%Phytic acid can preventfishbody discolouring in two minutes.

按卫生部颁发《食品添加剂卫生标准GB276J0——86增补品种》中规定植酸适用于水产品对虾保鲜参考用量以0.05%-0.1%的水溶液作为冷冻保鲜液，日本在贝类罐头中用0.1-0.5%植酸，以防黑变，鱼类用0.3%植酸，在100℃F处理，二分钟可防止鱼体变色。

BrightChina is devoted to development of lactic acid and poly-lactic acid industry where the renewable plant resources can be used as raw material, and the products include lactic acid and its derived lactates, lactic esters,poly-lactic acid, and other environment- friendly outputs.

公司致力于发展乳酸及聚乳酸产业。这已产业以可再生性植物资源为原料，产品包括乳酸及其衍生的乳酸盐类、乳酸酯类和聚乳酸等环境友好产品。

The technological processes of raw ore direct acid-leaching,raw ore salt roasting-water leching or acid leaching and raw ore salt roasting-acid pelletizing curing-acid leaching,etc.

原矿加盐焙烧水浸或酸浸；原矿加盐焙烧一拌酸制粒熟化酸浸等工艺过程。

The latter is chlorinated in the side chains under free-radical conditions to give 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethylbenzene. The latter is hydrolysed via 2,4-dichloro-5-fluoro-3-dichloromethylbenzoic acid, which can be isolated if necessary, to give 2,4-dichloro-5-fluoro-3-formyl-benzoic acid, the aldehyde group of which is reacted to give 2,4-dichloro-5-fluoro-3-N-hydroxyiminomethyl-benzoic acid, from which, with simultaneous conversion of the carboxyl group into the chlorocarbonyl group, water is eliminated using an acid chloride to give the nitrile 2,4-dichloro-3-cyano-5-fluoro-benzoyl chloride.

随后，在游离基条件下进行侧链的氯化，得到2，4-二氯-5-氟-3-二氯甲基-1-三氯甲基苯、后者被水解，经过2，4-二氯-5-氟-3-二氯甲基苯甲酸(如果需要此化合物可以分离)，得到2，4-二氯-5-氟-3-甲酰苯甲酸，将其醛基反应，得到2，4-二氯-5-氟-3-N-羟基亚氨基甲基苯甲酸，用酰氯从其中除去水，同时将羧基转化为碳酰氯，得到一种腈，即2，4-二氯-3-氰基-5-氯-苯甲酰氯。

METHODS:Ceftizoxime acid was prepared with 7-Amino-3-norcephem-4-carboxylic acid(7-ANCA)and AE-ester ceftizoxime acid as raw material;then ceftizoxime sodium was obtained through the reaction between ceftizoxime acid and sodium carbonate.

以粗品7-氨基-3-烷基头孢烷酸和AE活性酯为原料合成头孢唑肟酸，再与无水碳酸钠反应制得头孢唑肟钠；同时研究反应时间、乙醇用量和滴加时间、无水碳酸钠的用量以及pH值对产品质量的影响。

At the same time, with reference to the conditions of synthesis of methyl ester of salicylic acid, we combined ethyl ester of salicylic acid, salicylic acid-n-butyl, isobutyl salicylate, amyl salicylate, isoamyl salicylate and salicylic acid benzyl ester,besides, experimented the possibility for series of ester synthesis catalyst with Sodium bisulfate as a catalyst .

同时参照水杨酸甲酯的合成条件合成了水杨酸乙酯、水杨酸丁酯、水杨酸异丁酯、水杨酸戊酯、水杨酸异戊酯和水杨酸苄酯，实验了以硫酸氢钠为催化剂合成系列酯的可能性。

Solubility of barium chloride and barium oxide in hydrochloric acid, ethanol,acetone,ether and hydrochloric acid- ethanol,hydrochloric acid- acetone,hydrochlo- ric acid- ether has beeen studied and the separation of Ba O from Ba Cl\- 2 with hydrochloric acidethanol as the solvent has been proposed.

研究了氯化钡和氧化钡在盐酸、乙醇、丙酮、乙醚及盐酸-乙醇、盐酸-丙酮、盐酸-乙醚中的溶解性，提出以盐酸-乙醇为溶剂进行两者的分离。以 DBC- CPA为显色剂分光光度法测定氧化钡的含量，加料回收率为 98%～ 10 2 %，氧化钡含量为 0 。32 %时，平行测定 7次，相对标准偏差为 1。 58%。该法适于快速测定热处理盐浴中氧化钡的含量，对监控盐浴品质有指导意义

At present, we are lead-acid battery manufacturers to provide testing equipment, including: lead-acid battery repair device, the capacity of lead acid battery tester, resistance tester, lead acid battery combination device, the cycle performance tester; a variety of display instrumentation for industrial use; for shopping malls, retail, logistics, collaborative marketing management system, digital storage systems.

目前我们为铅蓄电池生产厂商提供检测设备，包括：铅蓄电池修复仪，铅蓄电池容量检测仪，内阻检测仪，铅蓄电池配组仪，循环性能测试仪；各种工业用显示仪表；为商场、零售、物流业，提供管理协同营销系统、数字化仓储系统。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。