化合物

Et Vant.; compounds 4 and 5 are first isolated from Folium Artemisiae argyi.

其中，化合物3为首次从本属植物中分离得到，化合物4、5为首次从艾叶中分离得到。

Forty-two compounds were isolated from Corydalis saxicola and fifty-two from Veratrum.

本文从两种植物中共分离鉴定了94个化合物，其中10个为新化合物。

Therefore esterification crosslinked reactionbetween polyearboxylic acid and wood can be quantitatively determined.According toexperiment results of stereoscopic configuration choices by crosslinking agents,crosslinkingreaction between model of reaction intermediate and wood,and the intermediate characteristic incrosslinking reaction,crosslinking reaction intermediate was proofed.We can infercrosslinking reactions between polycarboxylicacid and wood want through a mechanism of twosteps reaction process,the first cyclic anhydrides were formed as intermediates by dehydratingbetween hydroxyls in polycarboxylic acids,second esters were occurred by substitution reactionbetween wood hydroxyls and cyclic anhydrides.

从而可全面定量表征木材与多元羧酸类化合物的酯化交联反应；依据交联剂立体构型选择性、反应中间体模型物与木材的交联反应和交联反应中间体的波谱特征实验结果，证实了交联反应中间体，因此可以推测：多元羧酸类化合物与木材化学组分的交联反应是经历两步反应的机理，首先多元羧酸中相邻羧基的羟基之间脱水形成五元环酸酐中间体，然后木材的羟基与酸酐发生亲核取代反应形成酯。

Na2FlBr4Cl4 shows the maximum algaecidal activity, and the MLC value is 40μM with illumination and 90μM without illumination. From the research on the Na2FlBr4Cl4 against the growth of algae and the content of chlorophyll a, we obtains that xanthene derivatives have little effect on the growth of algae at low concentration and can restrain the growth of algae at middle and high concentration.

呫吨类化合物对铜绿微囊藻的测试结果显示：供试样品中对供试藻种活性最强的是Na2FlBr4Cl4，其MLC值为在光照条件下为40μM，在无光条件下为90μM；通过Na2FlBr4Cl4对铜绿微囊藻的生长量以及叶绿素a含量的影响的研究发现，在较低的浓度范围内，呫吨类化合物对铜绿微囊藻的生长没有太大影响，而在中高的浓度范围内，则能产生显著的抑制效应。

Thus, the photosensitizers are expected to degrade more rapidly in the environment.5. Na2Fl shows no obvious algaecidal activity with or without illumination, however, the other five xanthene derivatives shows approximately similar inherent toxicity and phototoxicity.

实验证实，呫吨类化合物在自然条件下能在发挥光敏生物活性的同时迅速降解为小分子化合物，残留量少，同时，其降解中间产物和终产物的光敏生物活性也迅速降低，对环境的潜在风险很小。5。

Analytical results showed that the upper clear liquid of pyrolysis oils was mainly consisted of water-soluble substances,such as phenol,cresol,xylenol,sugars,hydantoins,morpholines,pyranones and pyridine derivatives compounds,etc.,while the lower sediment was mainly insoluble or hardly water-soluble substances,such as the big substituent phenolics(the number of substituent carbon atoms of which is greater than or equal to 2),aryl phosphate esters,fatty acid esters and nitrile compounds,and so on.

研究表明，热解油上层清液主要是一些较易溶于水的物质，如苯酚、甲酚、二甲酚、糖类、乙内酰脲类、吗啉类、吡喃酮类和吡啶类化合物等；而下层沉淀则主要为不溶或难溶于水的物质，如大取代基酚类（取代基碳原子数≥2）、磷酸三芳基酯类、脂肪酸酯类和腈类化合物等。

Shijiazhuang 050018, ChinaOxidation desulfurization via photocatalysis was investigated by using thiophene in xylol as the model compound, and hydrogen peroxide is used as the oxidant. The effects of hydrogen peroxide mass fraction, high shear agitation time, titanium dioxide mass on the desulfurization efficiency of FCC gasoline were also investigated.

以噻吩的二甲苯溶液作为FCC汽油的模型化合物，双氧水为氧化剂，研究了在光催化作用下，双氧水体积分数、高速均质时间和二氧化钛的加入量等工艺条件对脱硫率的影响，在适宜条件下，模型化合物的脱硫率可达到80%以上。

Its active ingredient is the compound of different yellow ketone that gives priority to with element of the root of kudzu vine, this compound has outspread blood-vessel, improve heart head blood to circulate, reduce oxygen of cardiac muscle bad news, promote the secretion of saliva or body fluid stop to wait for pharmacodynamics action yearningly, have special curative effect to treating angina pectoris, migraine, paroxysmal deaf to wait.

其有效成分是以葛根素为主的异黄酮类化合物，该化合物具有扩张血管，改善心脑血液循环，降低心肌耗氧，生津止渴等药理功能，对治疗心绞痛、偏头痛、突发性耳聋等有非凡疗效。

Compound 1 is isolated from the plant of Zanthoxylum. Dissitum for the first time.

化合物(1)为首次从该植物中分离得到，化合物(6)首次从该属植物中得到。

The test results indicate that the zincate catalyst systems can accelerate these reactions high-effectively, so its selectivity is up to 100% and TOF is 5472h -1, and the activity and the selectivity of the catalyst are kept in six times, and the catalyst system can be availab.

研究了离子液体助催化的各种无机盐催化剂体系用于二氧化碳和环氧化合物通过环加成反应制备环状碳酸酯，结果表明锌盐催化剂体系能够非常高效地催化该反应，最高得到了 5 472h- 1的催化转化频率和 10 0 %的选择性，催化剂使用六次以后没有发现催化活性和选择性的下降，并且该催化剂体系能够适用于各种结构的环氧化合物。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。