二羧酸

So far, we have synthesized pentadecane diacid , which is a very important intermediate product during preparing muscone.

到目前，我们已经合成了制备麝香酮中重要的一步中间产物十五碳二羧酸。

Condensation condition was studied for lipase-catalyzed synthesis of β-sitosterol ester with conjugated linoleic acid in organic solvent.

采用高效酰化催化法和酰氯化法分别合成了燕尾型胆甾醇酯和对称脂肪族二羧酸胆甾醇酯两类衍生物样品。

The optimum condition of spectrofluorimetric determination of uranyl ion in pyridine 2,6 dicarboxylic acid β cydodextrin system is studied.

研究了吡啶 2 ，6 二羧酸β环状糊精体系荧光分光光度法测定铀酰离子的最佳条件以及某些稀土共存离子对荧光体系的干扰，并应用于人工样品的测定。

A certain amount of naphthenic,alkenyl and aromatic acids are also generated in the degraded samples.

可以推断，短短芽孢杆菌和蜡状芽孢杆菌对大庆原油的降解以氧化降解为主要途径，存在一种非常规的次末端氧化，同时兼有末端氧化和双末端氧化，生成单脂肪酸、羟基脂肪酸和二羧酸。

A water-soluble porphyrin dimer containing eight positive charges, bridged by 4,4 -dicar- boxy-2,2 -bipyridyl, has been synthesized.

以4，4'-二羧酸-2，2'-联吡啶为桥联试剂，合成了一种含8个阳离子的水溶性桥联双卟啉。

BACKGROUND: Na+/dicarboxylate transporter protein (NaDC3) participates in the metabolism of energy, which may has effect on cellular senescence; however, the mechanism is not clear.

背景：钠依赖二羧酸转运蛋白参与能量代谢，对细胞衰老可能有影响，但其促进细胞衰老的机制不清。

The complexation behavior of these compounds with linear or aromatic dicarboxylate was investigated by the means of absorption, emission spectra,〓H-NMR and molecular dynamics.

结果显示，二羧酸盐阴离子与双链萘基脲／硫脲哌嗪化合物发生络合形成新的物种导致双链萘基脲／硫脲哌嗪化合物的吸收和荧光光谱行为的变化。

The three tetranuclear copper complexes are structurally analogous and they all consist of a pair of [Cu22]+ or [Cu22]+ fragments bridged by a deprotonated dicarboxylate into dumbbell-shaped, neutral, tetranuclear molecules.

三个四核混合价铜化合物具有相似的分子结构，它们由一对[Cu22]+或 [Cu22]+碎片和一个架桥的二羧酸配体组成中性的四核的哑铃型结构。

A monomer, trithiocarbonate anion is successfully"immobilized"onto the polymeric support by reaction of CS〓 with strong-base quaternary ammonium in anion exchange resin with OH〓 form.

研究了把CS〓离子固定到阴离子交换树脂上，以及它在CS〓悬浮体系中和另一单体，α，α'-二溴代二羧酸甲酯在阴离子树脂表面上进行的亲核取代反应。

The proportion of the phase transfer catalyst and tertiary amine are usually in the range of about 1-5 and about 0.01-5.0 mole percent, respectively, based on total dihydroxyaromatic compound and dicarboxylic acid employed. In the second phosgenation step, the pH is raised to at least 10 and a stoichiometric phosgene excess of at least 5% is introduced.

相转移催化剂和叔胺的比例以二羟基芳族化合物和二羧酸的总量为基础计通常分别在约1―5和0.01―5.0摩尔百分数的范围内，在第二步光气化步骤中，pH值升高到至少约10，并导入超过化学计量约至少5wt％的光气。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。