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Eotaxin, a kind of chemokines of eosinophil found in recent years, is a kind of chemotactic agent of eosinophil.

近年发现的嗜酸粒细胞趋化因子,即Eotaxin基因,是一种嗜酸粒细胞选择性的趋化剂。

At present,the synthesis of lignin that is not only a means,but Phenylalanine AmmoniaLyaseand Cinnamic acid 4-Hydroxylase(C4H),such as enzyme in the synthesis played a very important role.

目前认为木质素的合成途径不只一条,但苯丙氨酸解氨酶和肉桂酸4-羟基化酶(C4H)等酶在合成中起到了十分重要的作用。

Cyanophycin has another valuable component: the amino acid arginine, which improves animal health when added to feed and reduces the level of nitrogen in urine.

蓝细菌中还有另外一种有价值的成分――精氨酸。向饲料中添加精氨酸后能够增强动物体质,减少动物尿液中的含氮量。

Experimental study on enhanced deaquation process for extra-heavy crude oil using dehydrant ;2. DMF refining by molecular sieve as dehydrant ;3. Hybrid catalysts composed of JC207 methanol synthesized catalyst and dehydrant (HZSM-5 zeolite or γ-Al2O3) were prepared for the synthesis of dimethyl ether.

采用甲醇合成催化剂JC207和固体酸脱水剂(HZSM-5分子筛或γ-Al2O3)混合制得合成二甲醚双功能催化剂,并在固定床反应装置中进行了活性评价,考察了固体酸脱水剂的酸性对一步法合成二甲醚的影响。

Two oleanane type triterpenes were isolated from the crude drug Lu Lu Tong , the fruits of Liquidambar formosana and their structures were elucidated as 2α,3β dihydroxy 23 norolean 4(24), 12(13) dien 28 oic acid(1), 2α,3β,23 trihydroxyolean 12(13) en 28 oic acid(2), based on 13 C NMR, DEPT, 1H NMR, 1H 1H COSY, 13 C 1H COSY, IR, MS and elemental analysis.

从生药路路通分离得到2个齐墩果烷骨架的五环三萜类化合物。通过13CNMR,DEPT,1HNMR,2D1H-13CCOSY,2D1H-1HCOSY,IR,MS和元素分析阐明了它们的结构。(1)为2α,3β-二羟基-23-去甲-齐墩果-4(24),12(13)-二烯-28-羧酸,(2)为2α,3β,23-三羟基齐墩果-12(13)-烯-28-羧酸,(1)未见文献报道,(2)是首次从这一植物中分离得

of identification of 5'-guanylic acid(5'-GMP) and 5'-inosinic acid(5'-IMP) in concentrated gourmet powder is described.

本文描述了一种快速测定增鲜味精中的5'-鸟苷酸(5'-GMP)和5'-肌苷酸(5'-IWP)的方法。

By reacting isobutyraldehyde with diethyl oxalate using sodium methoxide as catalyst,3-methyl-2-oxobutanoic acid,sodium salt was prepared by one pot.

3-甲基-2-氧代丁酸钠是一种重要的酮酸类化合物,它在制药工业、高分子工业、食品工业、日化业等领域都有着广泛的用途。

The results showed that the antioxidation capacity of D-isoascorbyl laurate was stronger than that of the other tested amtioxidants when the added concentration was the same.

将纯化后的异V月桂酸酯添加到茶籽油中,进行强氧化试验,结果表明异V月桂酸酯是一种良好的油溶性抗氧化剂。

A sort of lipase producing strain with relatively high esterification rate of ethyl hexanoate was obtained was isolated from Lavandula vera L. root soil. The strain was identified and named as Arthrobacter Y-605. The optimal lipase producing conditions of the strain was indicated in details and the results were as follows:2% maize meal, 1% soy flours, 0.1% urea, 0.05% MgSO4, 0.1% K2HPO4, 0.15% KCl.

以有机相中合成酶活为指标,通过对薰衣草根际土壤产脂肪酶菌株的筛选,获得了一株在有机相中合成己酸乙酯转化率相对较高的细菌Arthrobacter Y-605,其己酸乙酯转化率为67.53%。

The present invention discloses a polycarboxylic acid copolymer which is obtained by copolymerization of monomer components comprising a polyalkyleneimine unsaturated monomer (A2) and an unsaturated carboxylic acid monomer, the polyalkylene glycol unsaturated monomer (A2) having an oxyalkylene group bonded to a polyhydric alcohol residue, and the monomer component containing an unsaturated monocarboxylic acid monomer.

公开了一种多元羧酸共聚物,它是通过单体组分共聚制得的,所述单体组分包括聚二醇不饱和单体(A2)和不饱和一元羧酸单体,所述聚二醇不饱和单体(A2)具有使氧化烯基结合到多元醇残基上的结构,所述多元醇残基平均每个分子具有不少于3个羟基。

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