查询词典 acid-carbonate

Nanoscale zero valent iron particles were synthesized by reductive method in aqueous phase. The crystal structure, morphology and size of the particles were characterized using X-ray diffraction and transmission electron microscopy. The influence of temperature, initial acid fuchsine concentration, nanoscale zero valent iron dosage and pH on the removal of acid fuchsine by the particles was studied, and the removal mechanism of acid fuchsine was discussed.

摘 要：采用液相还原法制备零价纳米铁粒子；用X射线衍射和透射电镜表征该样品的晶体结构、颗粒形貌与尺寸；研究温度、酸性品红初始浓度、纳米零价铁加入量及溶液pH值对零价纳米铁粒子脱除酸性品红的影响，并对酸性品红的脱除机理进行讨论。

HPLC-DAD methods for analyzing of the nine compounds in Chinese propolis, samples, including caffeic acid, ferulic acid, p-cinnamic acid, kaempferol, apigenin, pinocembrin, chrysin and galangin and for the chromatographic fingerprint of propolis in different regions of China were established.

建立了高效液相色谱法测定中国蜂胶中9个酚类化合物(咖啡酸、p-香豆酸、阿魏酸、山奈酚、芹菜素、白杨素、高良姜素、乔松素、松鼠素)含量的方法；建立了中国蜂胶的高效液相色谱指纹图谱。

In order to obtain 3-methoxy-4-hydroxymandelic acid with high quality and high yield, guaiacol was condensed with glyoxylic acid in an alkaline aqueous solution using solid acid as catalyst. The reaction temperature and reaction time was 15℃ and 18 hours respectively.

为了得到高质量和高收率的3-甲氧基－4-羟基苯乙醇酸，使愈创木酚和乙醛酸在碱性水溶液中在固体酸催化剂存在下进行缩合反应，反应温度15℃，反应时间18h。

The synthesis methods of dibutyl succinate catalyzed by p-toluene sulfonic acid, amino sulfonic acid,strongly acidic cationic exchange resin, ferric chloride hexahydrate, stannic chloride pentahydrate, copper sulfate , ammonium ferric sulfate dodecahydrate, titanium sulfate, sodium bisulfate monohydrate,and solid super acid et al were reviewed.

本文评述了对甲苯磺酸、氨基磺酸、强酸性阳离子交换树脂、六水三氯化铁、五水四氯化锡、十二水合硫酸铁铵、硫酸钛、一水硫酸氢钠和固体超强酸等催化剂催化合成丁二酸二丁酯的方法。

Metabolic pathway analysis for this strain showed that pentose and hexose could be transferred to succinic acid and other byproducts including acetic acid and α-ketoglutaric acid.

对菌株的代谢途径分析表明细胞具有五、六碳糖代谢酶系，以及在大量合成丁二酸的同时也产生少量乙酸、α-酮戊二酸等副产物。

The mechanism of combination of weak acid and latex glove, homogeneous distribution of weak acid on surface of latex glove and existence of weak acid on latex glove were discussed.

研究了弱酸涂层的性能及其对弱酸涂层乳胶手套的影响效果，探讨了弱酸与乳胶手套的结合机理、弱酸在手套表层的均匀分布及其存在形式。

A hard Sugar-free candy was produced with Isomalt and Xylitol as the main raw materials by adding some Chamomile extract,Horehound extract Echinacea extract,AK, Aspartame ,Malic acid,Citric acid,Lactic acid.

本文以益寿糖，木糖醇为无糖原料，添加春黄菊提取物，夏至草提取物和海胆亚目提取物，并辅以少量AK糖和阿斯巴甜等强力甜味剂，苹果酸，柠檬酸，乳酸钙，斯德宝食用香料和食用色素，制成了品质风味优良的无糖硬糖。

The new compound,2- oxo-propionic acid p-carboxylphenyl hydrazone,was synthesized by the condensation reaction of 2- oxo-propionic acid and p-carboxylphenyl hydrazine which was prepared from p-aminobenzoic acid by diazotization and reduction.

以对氨基苯甲酸为原料，经过重氮化反应和还原反应，合成了对羧基苯肼(2)；2与2-羰基丙酸缩合得到新化合物2-羰基丙酸缩对羧基苯腙，其结构经UV，荧光光谱，1H NMR，13C NMR，IR和元素分析表征。

Chlorine, sulfuric acid, hydrochloric acid, nitric acid is my company's main products.

液氯，硫酸，盐酸，硝酸是我公司的主要产品。

Acid resistant: It can be used in Pollination, Hydrochloric acid, and Salinity with resistance to acid.

耐高温：因制作材料的特性，可以最高温度下使用，最高达200摄氏度。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐