丁二酸的

An ester or a salt of perchloric acid .relating to or producing butyric acid .

顺丁烯二酸氧化形成的酸（如在脂肪和碳水化合物的新陈代谢中）。

Di-methyl fumarate is an effective preservative containing such group, but it is banned to used in food because of its skin allergy.

反丁烯二酸二甲酯即为一种含有该功能团的广谱、高效、低毒的防腐剂，但由于其致皮肤过敏性在食品工业中得不到广泛的应用。

An acid formed by oxidation of maleic acid (as in metabolism of fats and carbohydrates).

顺丁烯二酸氧化形成的酸（如在脂肪和碳水化合物的新陈代谢中）。

After it was adjusted with ammonia until the test paper turned purple,in subacid medium of pH 6～7 ammonium acetate buffered solution,bivalent nickel was precipitated quantificationally by dimethylglyoxime.

试样以稀硝酸溶解高氯酸冒烟后，酒石酸掩蔽剂将铁等干扰元素配位掩蔽，以氨水调节至刚果红试纸呈紫色后，在pH6～7的乙酸铵缓冲溶液微酸性介质中，二价镍定量地被丁二酮肟沉淀。

The results showed in the seven food preservative s,that calcium propionate had no effect on the growth of Peronophythoral litchii,while cinnamyl glyceroyl fumarate was the best.

结果表明：在所用的7种食品防腐剂中，丙酸钙对荔枝霜疫霉菌的生长无抑制作用，反丁烯二酸桂醇甘醇酯的抑菌效果最好

In this experiment we use the alcohol to replace the Fumaric acid and using the NaOH and HCl to control the pH number.

而本实验就是以过锰酸钾加入酒精以代替过去使用的反丁烯二酸并以HCl及NaOH来调控其酸碱值并比较其反应后的各种性质。

In this paper,the monomers including St and BA with strong waterproof property were employed to modify the traditional PVAc emulsion,and meanwhile draw into DAAM functional monomer in the copolymer system,will prepare out cross linking copolymer emulsion for ADH to improve the waterproof,oilproof and dry/wet mechanical property of fuel oil filter paper.

采用具有较强抗水性的苯乙烯、丙烯酸丁酯等单体对传统聚醋酸乙烯酯乳液进行共聚改性，并在共聚体系中引入双丙酮丙烯酰胺功能单体，制备出可通过外加己二酸二酰肼交联的外交联醋丙共聚乳液，以期提高燃油滤纸的耐水、耐油性和干湿态的力学性能。

The GLE of MA-dibutyl sebacate were calcualted by the data looked from literature on COOOC using UNIFAC method.

查取文献报道的涉及COOOC基团的汽液平衡数据，由UNIFAC方法和回归关联的方法计算出癸二酸二丁酯-顺酐体系的气液平衡关系。

Ordinarily the reaction rate of amino acids is faster than that of glycols, but the carbon chain of ethylene glycol is very short, the reaction rate of L-aspartic acid was longer than that of ethylene glycol.

另外，丁二醇比乙二醇碳链长，位阻大，反应慢；通常氨基酸的反应速度要比醇快，但由于乙二醇的碳链很短，导致其比天冬氨酸的反应速度还快。

Synthesis of polyester polyol of sebacic acid series;2. Study on catalyst used to synthesis of polyester polyol ;3. A series of polyester-based thermoplastic polyurethanes elastomer were prepared from polyester polyol ,diphenylmethane-4,4'-diisocyanate and 1,4-butanedio by one-step process.

以聚酯多元醇、4，4'-二苯基甲烷二异氰酸酯和1，4-丁二醇为原料制备了一系列聚酯型热塑性聚氨酯弹性体，对硬段含量、软段种类和软段的分子量等分子结构参数对其力学性能和阻尼性能的影响进行了研究，探索影响规律性，采用原子力显微镜对其软/硬段微相分离结构进行了研究。

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。