查询词典 acid-base

Per 1 L grape wine containes 40～220 g glucose and fructose, 0.5～1.5 g pentose, 0.01～0.9 g gumminess and phlegm, 2～7 g tartaric acid, 0.5～0.8 g malic acid, 0.2～0.9 g succinic acid, and 0.1～0.75 citric acid etc.

每1L葡萄酒含葡萄糖和果糖40～220g，戊糖0.5～1.5g，树胶质和粘液汁0.01～0.9g，酒石酸2～7g，苹果酸0.5～0.8g，琥珀酸0.2～0.9g，柠檬酸0.1～0.75g等。

The synthesis methods of nipagin esters catalyzed by sulfuric acid , p- toluene sulfonic acid , ferric sul-fate hydrate, ferric chloride hexahydrate, aluminium chloride hexahydrate, rare earth compound, solid super acid and heteropoly acid were reviewed.

评述了采用硫酸、甲苯磺酸、合硫酸铁、水合三氯化铁、水合三氯化铝、土化合物、体超强酸和杂多酸等催化剂催化合成对羟基苯甲酸酯的方法。

The decrease of total humic acid, free-form humic acid and water soluble humic acid of compost after composting, and the increase of the ratio of humic acid to organic carbon proved obvious trend of carbon humification in the compost course.

腐熟后的堆肥总腐殖酸、游离腐殖酸及水溶性腐殖酸呈下降趋势，但腐殖酸与有机碳的比率增高，说明堆肥过程中碳素腐殖化作用明显。

The trials were carried out in field experiment and artificial climate incubator. The sugar beet growth buds were treated at 1～3pairs of true leaves with gibberellin , autix , naphthaleneacetic acid and kinetin , and the plant growth regulating substances enhancing bolting of sugar beet in the first year and its doses were selected out. The sugar beet seedling induced by temperature and light were treated by abscisic acid , maleic hydrazide , uniconazole (S-3307) and paclobutrazol (PP333), and the plant growth regulating substances which make bolting reverse and their doses were screen out. The mechanisms of bolting and bolting reversing were discussed by examining the changes of endogenous hormones, activities of correlative enzyme to bolting, soluble protein, components of amino acid in the protein, components of fatty acid. The results were as follow

本研究通过田间试验和人工气候箱培养相结合的方法，在甜菜幼苗1~3对真叶时利用赤霉素、生长素、奈乙酸和激动素等生长调节物质处理茎生长点，筛选促进甜菜当年抽苔的植物生长物质及剂量；同时利用脱落酸、马来酰肼、烯效唑（S-3307）和多效唑（PP333）等处理经温光诱导当年抽苔的甜菜幼苗，筛选对当年抽苔逆转有效的种类和剂量，并通过测定内源激素含量、相关酶活性、可溶性蛋白质含量和氨基酸组分及脂肪酸含量及其组分的变化，探讨甜菜当年抽苔和抽苔逆转的机理，得到如下结论

At present, the output of hydrocyanic acid produced as a by-product in production of acylonitrile is reached 100000t/a, a suggestion is offered on producing iminodiacetic acid by direct synthesis based on hydrocyanic acid for those enterprises having advantage in hydrocyanic acid resource.

目前国内在生产丙烯腈过程中每年副产氢氰酸10万t，有原料优势的企业采用氢氰酸直接合成法工艺生产亚氨基二乙酸。

A kind of more effective viscosifier can improve the viscosity of acid solution, reducing the mass transfer velocity of hydronium H+ towards the rocks surface, thereby decrease the filtrate loss of acid solution and the reaction rate between acid and salt, lengthen the distance of acid penetration.

向酸液中加入良好的稠化剂能提高酸液粘度，降低氢离子向岩石壁面的传质速度，因而降低酸液滤失和酸盐反应速率，增加了酸液的有效作用距离，提高了酸化效果。

Alpha hydroxy acids – include glycolic acid, mandelic acid, malic acid, lactic acid.

阿尔法羟基酸-包括乙醇酸，扁桃酸，苹果酸，乳酸。

The results show that the total acid amount changed indistinctively and strong acid sites increased relatively if the treated temperature was not higher than 400 ℃ even in two different treated media. However, the total acid amount decreased obviously and strong acid sites nearly disappeared as the treated temperature was beyond 500 ℃, and the second pore with different pore sizes formed and average pore diameter enlarged of MCM-22 zeolite catalysts after hydrothermal treatment.

研究结果表明，在两种不同介质中和处理温度不高于400 ℃条件下，催化剂的总酸量变化不大，强酸中心有所增加；处理温度高于500 ℃后，催化剂的总酸量明显下降，强酸中心基本消失；经水热处理后， MCM-22分子筛催化剂中形成了孔径不均匀的二次孔，平均孔径增大。

Originally techniques dropped formaldehyde into the mixture of phosphorous acid and monosodium of imino diacetic acid in high temperature. Owing to phosphorous acid is produced from phosphorus trichloride in industry by hydrolysis, inspissation and crystallization, if we use phosphoros trichloride directly on synthesize N- iminodiacetic acid, not only can simplify operation, but also can reduce the cost and save energy.

原工艺采用的是在酸性条件下高温时将甲醛滴加到亚磷酸与亚氨基二乙酸一钠盐混合溶液中进行反应，考虑到工业上亚磷酸的合成一般采用三氯化磷水解、提浓、结晶制得，直接将三氯化磷用于双甘膦的合成，不仅可以简化操作过程，而且对于降低生产成本和能耗有明显意义。

Smaller amounts of malic acid, citric acid and lactic acid can also be found, as can acetic acid.

除醋酸外，还有少量的苹果酸，柠檬酸和乳酸。

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。