有机酸是指广泛存在于生物中的一种含有羧基的酸性有机化合物（不包括氨基酸）。最常见的有机酸是羧酸，其酸性源于羧基 (-COOH)。磺酸 (-SO3H)、亚磺酸(RSOOH)、硫羧酸(RCOSH)等也属于有机酸。有机酸可与醇反应生成酯。
... 6 碳水化合物 (carbohydrate)： 7 有机酸 (inoganic aci ds)： 8 维生素 (Vitamin) ： ...
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Through reflux better hydraulicconditions were achieved in the system and organic acid was prevented fromaccumulation. and the efficacy of wastewater treatment was improved.
并通过回流,实现了系统内良好的水力条件,有效地避免了有机酸积累;从而保证高传质速率下的高净化效能。
参考来源 - 城市污水高效厌氧处理技术研究The contents of soluble protein and organic acid between 2 ancient litchi varieties had not significant difference with that in Dahongpao.
2种古荔枝的可溶性蛋白和有机酸含量与大红袍差异不显著。
参考来源 - 乐山古荔枝果实的品质分析A supramolecular synthon I R22(7) containing classical O-H…N and weak C-H…O interactions, usually observed in organic cocrystals of carboxylic acids with other heterocyclic bases, is again shown to be involved in constructing most of these hydrogen-bonding networks.
合成子IR_2~2(7)由经典的强O-H…N和弱C-H…O氢键构成,该合成子通常出现在有机酸与杂环碱所形成的共晶中,对构筑新型超分子氢键网络起到了关键性的作用。
参考来源 - 基于氢键合成子的竞争与预测·2,447,543篇论文数据，部分数据来源于NoteExpress
要注意的是，绿豆不宜煮得过烂，以免使有机酸和维生素遭到破坏，降低清热解毒功效。
Beware that do not boil mung beanl too rotten, lest make organic acids and vitamin destruction, reduce heat clearing and detoxicating effect.
气体和有机酸也由糖化菌发酵。
Gases and organic acids are also produced by saccharolytic fermentation.
研究了有机酸在阴离子交换柱垫片组（日本岛津）上的作用机制。
The mechanism of organic acids on an anion exchange column Shim pack (Shimadzu, Japan) have been studied.
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