查询词典 acid-base

The lactic acid had some results.Conclusion:It is concluded that chitosamine can reduce the amount of total acid after S.mutans metabolization,especially lactic acid.

甲壳胺能使变链菌代谢后的总酸量降低，包括挥发酸和非挥发酸，特别是乳酸。

For usual acid"s leaching out efficiency is low for Gallium in fly ash, we did some analysis on fly ash which drew out or not through X-ray, electron probe, and scan electron microscopy chlorhydric acid .And those analysis gave us rational explain that the low leaching out efficiency for Gallium from fly ash with chlorhydric acid"s draw out juice.

针对常规酸对粉煤灰中镓浸出率偏低这一现象，我们通过X-射线、电子探针和扫描电镜对盐酸浸出反应前后粉煤灰的分析，对盐酸浸出粉煤灰中镓的浸出率低作出了合理的解释。

Synthesis process Molecular Formula:〓 Molecular Weight: 394 Chemicla name: N-(2, 3-dihydro-2, 7-dimethyl-benzofuran-1-acyl)-N'-tert-butylN'-(3, 5-dimethyl benzoyl) hydrazine Structural formula:〓 This article define a synthesis method of JS118 with (2, 3-dihydro-2, 7-dimethylbenzofuranyl)-6-formic acid, tert-butyl hydrazine hydrochloride acid and 3, 5-dimethyl benzoic acid as main intermediate through four steps of reaction involving, acyl chloridation condensation and so on.

本文主要的研究工作内容：(1)以N-特丁基双酰肼为先导结构，利用分子等排原理和类同合成法进行先导设计，有目的、有选择地重点改变R〓、R〓基团，将具有不同取代基的苯环以及呋喃环、苯并呋喃环、吡咯环、吡啶环等杂环、稠杂环与先导结构进行有机的组合。

In this paper, the applications of the environmental friendly solid acid catalysts for esterification were studied and the activities of these catalysts were discussed, by which the solid acid ferric sulfate x-hydrate was used first as catalyst in the synthesis of dimethyl fumarate and ethyl chloroacetate and solid super acid SO42-/Fe2O3 was used first as catalyst in the synthesis of ethyl p-nitrobenzoate.

本文研究了对环境友好的固体酸催化剂在酯化反应中的应用，首次以固体酸Fe_2(SO_4)_3·xH_2O为催化剂合成了新型防霉剂富马酸二甲酯和化工原料氯乙酸乙酯，以固体超强酸5O_4~(2-)／Fe_2O_3为催化剂合成了医药中间体对硝基苯甲酸乙酯，并探讨了这些催化剂的催化活性。

The preparation process includes the following steps: mixing 10 mM concentration water solution of chloropalladic acid and 12.5-25 mM concentration water solution of ammonium hexadecyl trimethyl bride in the volume ratio of 1 to 20, heating to 65-95 deg.c, adding 100 mM concentration water solution of ascorbic acid in the volume ratio to the water solution of chloropalladic acid of 0.16 to 1 to react for 30 min, centrifugal separation to collect precipitate, water washing, and drying to obtain cuboidal nanometer Pd material.

该钯纳米长方体材料的制备方法的步骤和条件法如下：把体积比为1∶20的10mM氯钯酸水溶液和12.5-25mM十六烷基三甲基溴化铵水溶液混合，加热至65-95℃，然后加入与10mM氯钯酸水溶液的体积比为0.16∶1的100mM抗坏血酸水溶液，反应30分钟，将溶液离心分离，收集到的沉淀用水洗涤，干燥，得到钯纳米长方体。

Ion exchanage materials are also used to purify the chlorous acid and chlorine dioxide solutions, without causing degradation of said solutions, to exchange undesirable ions in the chlorous acid and chlorine dioxide solutions with desirable ions, such as stabilizing ions, and to adjust the pH of chlorous acid and chlorine dioxide solutions.

所述离子交换材料也可以用于纯化亚氯酸和二氧化氯溶液，从而在亚氯酸和二氧化氯溶液中用想要的离子如稳定离子交换不想要的离子，并调节亚氯酸和二氧化氯溶液的pH值，而不造成所述溶液的质量降低。

Methods Serum contents of folic acid, vitamin B12 （VB12 ）, cholalic acid, interleukin（IL-2）, tumor necrosis factor, hyaluronic acid, type IV collagen, transforming growth factor-α, and cortisol were detected by radioimmunoassay and analyzed.

应用放免测定法对患者血清叶酸、VB12、胆酸、白细胞介素素-2（IL-2）、肿瘤坏死因子、透明质酸、Ⅳ型胶原、转化生长因子-α、皮质醇进行测定和分析。

People's bile acid are cholic acid and the goose desoxy cholic acid.

如人的胆汁酸是以胆酸、鹅脱氧胆酸为主，而奶牛胆汁酸的主要成分为胆酸和脱氧胆酸，鸡体内脱氧胆酸含量很少，鹅脱氧胆酸的含量最高。

The squaric acid, croconate acid, salicylic acid which contain hydroxy can form a big integration anion with Boron, assemble many lithium salts combining with the lithium ion which should have novel structure and a good electrochemical property.

方酸、克酮酸、水杨酸由于含有羟基，能与B形成大螯合阴离子，从而与锂离子可以组装成许多具有新颖结构和良好电化学性质的锂硼盐电解质。

For systematically studying the quantitative structure-property relationships for electrolytes, the thesis chapter 6, 7 and 8 systematically studied molecular structure and quantitative structure-property relationships, including the relationship between molecular structure and conductivity, anions structure and electrochemistry stability, on anions of 1,2-Dihydroxycyclo-pentenetrione (croconic acid, H_2C_5O_5) and the whole series of dicyanomethylene derivatives, anions of 1,2-dihydroxycyclobuten- 3,4-dione (squaric acid, H_2C_4O_4) and the whole series of dicyanomethylene derivatives, and anions of 1,2-Dihydroxy-cyclobuten- 3,4-dione (squaric acid, H_2C_4O_4) and the whole series of dicyanomethylene derivatives.

为了系统地研究锂盐的分子结构与电解质的关系，论文第六、七、八三章系统地从理论上研究了方酸及其氰基亚氨基衍生物、方酸及其二氰亚甲基衍生物、克酮酸及其二氰亚甲基衍生物等各系列电解质分子结构、分子结构与电导率、阴离子结构与电化学稳定性的关系。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。