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The mechanism of the interaction between bovine serum albumin and pyrano [4,3-b] pyran derivative, 2-amino-7-methyl-4-(4-nitrophenyl)-5-oxo-4,5-dihydropyrano [4,3-b] pyran-3-carbonitrile, was studied by means of fluorescence spectroscopy under physiological conditions.

用荧光光谱法分析了在生理条件下一种吡喃并[4,3-b]吡喃衍生物-2-氨基-7-甲基-4-(4-硝基苯)-5-氧代-4H,5H-吡喃并[4,3-b]吡喃-3-腈与牛血清白蛋白的作用机制。

Pyrazine derivatives have been synthesized. And the 3-keto glycosides can be employed to asymmetric synthesis.

并利用两种邻苯二胺与2-位氧化α-甲基D-葡萄糖苷反应合成了两种含糖吡嗪衍生物。

A spec-trophotometric method of the determination of trace tin was developed based on the reaction of tin with Pyrocatechol Violet in the presence of Cety Trimethylammonium Bromide in high alloy steel.

通过对干扰离子的影响及其消除方法的研究,提出了适用于高合金钢中的以邻苯二酚紫-溴化十六烷基三甲基胺光度法测定微量锡的分析方法。

Amounts of 2 furaldehyde and 5 hydroxymethyl 2 furaldehyde in wood vinegar from the treated wood were increased,but amounts of carboxylic acids,phenols,pyrocatechol,guaiacols,and maltol were almost constant.

与未处理材相比,处理材木醋液中糠醛及5 羟甲基糠醛的收量增加,而羧酸类、苯酚类、邻苯二酚、愈创木酚类及麦芽酚的收量几乎不变。

The SMPEES copolymers have high ion exchange capacity because of o-methylhydroquione itself simple structure,which results in a high proton conductivity in reactively low degree of sulfonation...

发现邻甲基对苯二酚结构单元的存在,使聚合物具有较高的离子交换容量,从而使低磺化度的共聚物具有相对高的质子传导率。

The SMPEES copolymers have high ion exchange capacity because of omethylhydroquione itself simple structure, which results in a high proton conductivity in reactively low degree of sulfonation.

发现邻甲基对苯二酚结构单元的存在,使聚合物具有较高的离子交换容量,从而使低磺化度的共聚物具有相对高的质子传导率。

The blending method, blending time, the level of waste rubber powder and WRP modified by resorcin and hexamethylenamine were investigated to find their influence on the mechanical properties of NR blends.

研究了共混方法、共混时间、废胶粉的用量以及废胶粉经间苯二酚和六次甲基四胺改性后对废胶粉/NR共混胶力学性能的影响。

NBR/modified montmorillonite and NR/HMMT nanocomposites were prepared by the mixing intercalation method with the monomers resorcin and hexamethylenetetramine complex . XRD and TEM showed that the interlayer spacing of HMMT had got much larger with RH addition and the layers of HMMT had dispersed in rubber matrix on nanometers. FTIR and crosslinking density results explained that chemical reaction had occurred between RH and rubber in the course of vulcanization, which improved the crosslinking density of rubber and enhanced the interaction between the rubber and HMMT.

采用单体混炼插层法,引入间苯二酚-六次甲基四胺的络合物,制备了橡胶/改性蒙脱土插层纳米复合材料。X-射线衍射分析表明:RH的加入使蒙脱土层间距不断扩大;TEM观察到无机片层在橡胶基体中纳米级分散;FTIR和交联密度的分析发现,在硫化过程中RH与橡胶发生化学键合反应,同时与改性蒙脱土相互作用,使得体系交联密度提高。

Curing reactions of BPF/R EP system containing dicyandiamide were studied with differential scanning calorimetry,and the curing systems and curing condition were studied systematically with 2-ethyl-4-methyl imidazole(2E4MZ) accelerating dicyandiamide,which affected the property of BPF/resorcin copolymeriza.

通过差示扫描量热法研究了2-乙基-4-甲基咪唑对双氰胺-双酚F/间苯二酚共聚型环氧树脂体系固化反应的促进作用,并系统地探讨了固化体系及固化条件对固化物性能的影响。

In addition in the complexes, Ar atom has apparent obstruction to the internal rotation of the methyl group.

另外,在复合物内部,Ar原子对甲基氟苯中的CH3内转动有明显的阻碍作用。

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我的第一篇文章为屏幕力量杂志,在对这天是Jackie Chan 正式杂志,是香港actioner Gen X 警察的DVD 回顾,担任主角Nicholas Tse 和丹尼尔吴。

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