An uncommon class of organic esters are the orthoesters.
一种不常见的有机酯类是正构脂类。
Furoic acid esters are important aroma substances.
糠酸酯是一类重要的香味物质。
The methanol reacts with the fatty acids to form esters.
甲醇和脂肪酸发生反应形成酯。
Carboxylic acid esters are important chemical raw materials.
羧酸酯是重要的化工原料。
N-oxides of heterocyclic esters, amides, thioesters, and ketones.
杂环酯，酰胺，硫代酸酯和酮的N-氧化物。
Main components: a variety of aromatic ketones and aromatic esters.
主要成分：各种芳香酮及芳香酯类等。
Esters, alcohols, aldehydes, and lactones were the major constituents.
主要成分为酯类、醇类、醛类、内酯类化合物。
Nitrous esters can react with alkyl peroxides to yield alkyl nitrates.
亚硝酸酯与过氧化烷基反应，得到烷基硝酸酯。
Nitrous esters can react with alkyl peroxides to yield alkyl nitrates .
亚硝酸酯与过氧化烷基反应，得到烷基硝酸酯。
Esters are named as derivatives of the acids from which they are derived.
酯是作为相应的酸的衍生物来命名的。
Sulfuric acid is main catalyst for the synthesis of carboxylic acid esters.
羧酸酯的合成主要用硫酸作催化剂，但这种催化剂有许多缺点。
Improvement of catalyst for hydrogenation of methyl esters to produce fatty alcohols.
甲酯加氢制脂肪醇催化剂的改进。
Environmental hormone phthalate esters are an important kind of environmental hormone.
环境激素类邻苯二甲酸酯是一类重要的环境激素物质。
The advantage of esters is that they substitute directly for petroleum-based diesel fuel.
酯类的优势是它们直接替代了石油制柴油燃料。
Recently the reactivity of nitric esters in the presence of hydrazine has been investigated.
人们近来研究了有肼存在时硝酸酯的反应性。
The synthesis of esters with different sugars and different fatty acids were also investigated.
同时考察了苯基硼酸对不同糖和不同脂肪酸合成糖酯的影响。
At sufficiently high temperatures and alkalinity, fatty esters may be hydrolyzed to produce soaps.
在足够的温度和碱度的情况下，脂护酯可能被水解产生皂类。
Do not recommend the use of low molecular weight in ketones, esters and mixtures containing nitrate.
不建议使用于酮类、低分子量的酯类及含硝的混合物。
As safe preservatives with high efficiency, Nipagin esters are widely used in food and medicine fields.
尼泊金酯是一类高效安全的防腐剂，在食品和药品领域中应用广泛。
Not recommended for use in chemical acid, nitro hydrocarbons, esters, ketones and compounds in chloroform.
不建议使用于强酸、硝基烃、酯类、氯仿及酮类的化学物之中。
In beverages and condiments, esters, organic acids, sugars and amino acids are the major flavor components.
饮品与调味品中的香味成分主要包括酯类、有机酸、糖类和氨基酸等。
Extraction, characterization, and insecticide activity of sucrose esters exuded by some plants are introduced.
介绍了植物产生的蔗糖酯的提取、结构表征和杀虫活性。
The product was mainly consisted of acids, alcohols, aldehydes, ketones, esters, water and small-molecule gases.
白松的热裂解产物主要有酸类、醇类、醛类、酮类、酯类、水分和小分子气体等。
The results indicate that the single and mixed micelles exhibit strong inhibition on the saponification of esters.
结果表明：单一和混合胶束对正脂肪酸乙酯的皂化反应有较强的禁阻作用。
Objective: to investigate pollution levels and characteristics of Phthalate esters in surface water in Nantong city.
目的：了解南通市地表水中邻苯二甲酸酯类污染水平和特征。
Stabilities of lutein and its esters against light, heat, acid, alkali, metal ions, oxidant and reductant were studied.
研究光、热、酸、碱、金属离子、氧化剂和还原剂对叶黄素酯和叶黄素稳定性的影响。
The heat of evaporation for various kinds of alkanes, alcohols, esters and aromatics were determined by gas chromatography.
本文用气相色谱测定了多种烷烃、芳烃、醇类和酯类的蒸发热。
The heat of evaporation for various kinds of alkanes, alcohols, esters and aromatics were determined by gas chromatography.
本文用气相色谱测定了多种烷烃、芳烃、醇类和酯类的蒸发热。
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