查询词典 aromatic compounds

To find anti-PAF lead compounds, we studied its chemical constituents, and 12 compounds including flavonoids, cerebroside and galactosylacylglycerols were identified.

我们对锡兰肉桂地上部分的乙醇提取物进行了活性筛选，结果表明具有抗PAF活性。

Moreover, the inner cone has the characteristic of Lewis basis with high electron density because of the lone-pair electrons of oxygen atoms stretching towards it and can form inclusive compounds with varied compounds. The special structure of CD is very important to separate and analyze enantiomers, which has become the most important mainbody of super-molecular chemistry and greatly improved the developments of bioscience and pharmaceutical chemistry.

环上具有多羟基，具有亲水性。O原子的孤对电子朝向内腔，使内腔具有高的电子密度，具有Lewis碱的特征，能和多种化合物形成包合物，这种结构因素在手性识别上起作用，目前它已经发展成为超分子化学最重要的主体，对促进生命科学和药物科学的发展具有重大意义。

The results show that the synthetic compounds conform to the target compounds and the primary bioassay for anti-vibrio activity displays that the pyrrole alkaloids have a weak inhibition against Vibrio parahaemolyticus and Vibrio alginolyticus compared with the positive control of chloromycetin.

结果表明，所合成的化合物与目标化合物结构相一致。初步的抗溶藻弧菌和副溶血弧菌活性筛选表明，合成的吡咯生物碱具有一定的抗弧菌活性，但相对于阳性对照药氯霉素来说，合成的绝大部分吡咯生物碱抗弧菌活性较弱。

The change of Ortho chlorophenol and pyrocatechol, which were used as models of chlorophenol compounds and polyphenol compounds respectively during the electroanalysis process was also investigated in order to find degradation mechanism.

实验中以邻苯二酚和邻氯苯酚作为多酚类化合物、木素衍生物和氯酚类化合物的模型物，探讨了多酚类化合物和氯代酚在电化学处理过程中的降解机理。

The varying tendencies of partition coefficients of some compounds in aqueous or nonaqueous solvent systems by calculating the phase equilibria with universal quasichemical functional group activity coefficient model are predicted. These compounds included saturated and unsaturated fatty acids ethyl esters,N2,4dinitrophenylamino alcohols, pnitrophenyl glucosides and so on, with simple structures and much differences in polarity.

以饱和及不饱和脂肪酸乙酯、2，4二硝基苯胺基脂肪醇和对硝基苯基葡萄糖甙等结构较为简单、极性差别较大的溶质系列为研究对象，应用修正的通用基团活度系数模型，通过相平衡计算，预测了它们在含水或不含水的溶剂体系中分配系数的变化趋势，并与前人的工作进行了对比。

Compounds 1 and 2 were isolated from the genus Coleus for the first time.Compounds 3 and 4 were isolated from C.forskohlii for the first time.

化合物1和2为首次从鞘蕊花属植物中分离得到，并首次运用2D-NMR技术对其碳氢信号进行准确归属，化合物3和4为首次从毛喉鞘蕊花中分离得到。

A method for determinating the activities of pectinase was proposed in this paper. It can produce the red-brown amino compounds when 3,5-dinitrosalicylic acid and aldehyde were heated together. The amino compounds had maximum absorbency at 540nm. In certain range, there was a good linear relationship between the amount of reducing sugar and the color of the reaction mixture.

针对QB1502-92标准测定方法测定高活力果胶酶、固定化果胶酶活力存在的实验误差大，重现性及灵敏度差的缺陷，提出了利用3，5-二硝基水杨酸与醛糖共热产生棕红色的氨基化合物，在一定范围内还原糖的量和含有呈色氨基化合物的反应液颜色深浅成正比的原理，在540nm下测其吸光度，从而计算出果胶酶活力的测定方法，并对测定步骤、影响因素及测定中可能出现的问题进行了试验研究。

The method, which is capable of effecting very good separation of phenol and the 3 cresol isomers under the same chromatographic conditions, can be used to determine phenolic compounds in phenolic tar by external standard, and to analyze these compounds in the toxic leaching solution of the tar.

摘 要：建立了酚焦油中酚类物质质量分数测定和浸取毒性测定的气相色谱法，此法可以在同一色谱条件下对酚焦油中的苯酚及邻、间、对甲酚实现很好的分离，利用外标法分别进行定量分析，并对酚焦油浸取液中相应组份进行测量。

The anti-inflammatory activity of five of these compounds (B1, B4, B5, B6 and B7) was tested on mouse ear edema induced by croton oil, and the result showed that the inhibition ratios of compounds B4, B6 and B7 were between 65. 9%, 61. 7%and 52. 5%respectively (P.001%compared with control group), when the hypodermic injection dose was 50mg/kg, which are worthy for further research and development.

测定了其中5个化合物B1、B4、B5、B6和B7的抗炎活性（剂量为50mg／kg，皮下注射），发现化合物B4、B5和B7抗炎活性较好，对小鼠耳廓肿胀的抑制率分别为65.9％、61.7％和52.5％，和对照组相比P.001，这些化合物有进一步研究开发的价值。

All compounds are synthesized starting from the acylation reaction of gallic acid with L-glutamine to form the basic scaffold, followed by the cyclic reaction in acetic anhydride and the key intermediate cyclic anhydride (compound 4) was obtained. The intermediate compound is condensed with different amino acids or primary amines, and produces the target compounds.

本研究以L－谷氨酸为基本骨架，与甲醚化保护的没食子酸缩合后，经过酰化、环合反应得到关键中间体环状酸酐（化合物4），再经胺解反应合成目标化合物，其化学结构经过红外光谱、电喷雾质谱和核磁共振谱（氢谱、碳谱、碳氢异核多键相关谱）确证。

Mr. Putin said there were signs of genocide against the Ossetian people.

普京说，有迹象表明对南奥塞梯人进行了种族清洗。

What I'm trying to say, Tristan is...

特瑞斯坦。我想说的是。