香豆素

The yield of coumarin could be reached up to 86.6% with lower consumption of acetic anhydride in case the total molar ratio of acetic anhydride to salicylaldehyde=1.9∶1 and the reaction was kept 0.5 h at 212～216 ℃ when the reaction was close to the end.

水杨醛与乙酸酐的总摩尔比为1∶1 。9，反应近终点时在(214±2)℃保温反应0.5 h，香豆素收率达86.6%。

Scopoletin ameliorated the scopolamine induced on water maze and elevated plus maze in rats.

此作用与其含有较多之多酚类、黄酮类及香豆素类成分有关。

In general, juice from ripe fruits contained higher total quantities of phenolic compounds, condensed tannins, flavonoids and scopoletin, and thus exhibiting better scavenging capacity for free radical, superoxide anion radicals and H2O2 and higher ACE inhibitory activity.

一般而言，成熟的诺丽果含有较高的总酚化合物、缩合单宁、类黄酮和7-羟－6-甲氧香豆素。因此具有较佳能力以扫除自由基、超氧阴离子和过氧化氢及较强ACE抑制力。

Results:The leaves of Tatarian Dogwood contained amino acid,polysaccharides,reducing sugar,glycosides,cardiac glycosides,anthraquinones,flavonoids,tannin,volatile oils and chlorophyll.Protein,organic acid,coumarin and alkaloid failed to be detected.

结果：红瑞木叶含有氨基酸、多糖、还原糖、苷类、酚性物、蒽醌、黄酮、鞣质、挥发油、叶绿素等化学成分，未检测出蛋白质、有机酸、香豆素、生物碱、皂苷类成分。

Among the 6 coumarins, the Papp values of umbelliferone, osthole, angelolA and angelolB from AP to BL side were identical with that of propranolol, and columbianadin and columbianetin acetate lied between propranolol and atenolol.

前期研究［2］我们报道了独活中香豆素类化学成分的鉴定，这些成分多具有镇痛、抗炎、抑制血小板聚集和实验性血栓形成、拮抗钙通道阻滞剂受体等生物学活性［3］。

2In ammoniacal solution these compounds have a blue, blue-green or violet fluorescence, which has long been used as a qualitative test for certain umbelliferous resins.

Property ①异羟肟酸铁反应：香豆素具有内酯环，能与异羟肟酸铁反应，产生紫红色，可被用来鉴别和比色测定。

The result showed that the contents of p hydroxy benzoic acid,vanillic acid(extracted by 1mol·L -1 NaOH) in continuous cropping soil were significant higher than that in normal cropping soil,and the content of vanillin had no significant difference in these soils.

结果表明，重茬土壤中对羟基苯甲酸和香草酸的含量(1mol·L-1NaOH提取)大于正茬土壤，且差异达到极显著水平，香草醛含量差异不显著；重茬大豆根系水提液中对羟基苯甲酸、香草酸、阿魏酸、香草醛、香豆素含量均高于正茬。

Finally, some differentially expressed proteins identified were cataloged and discussed based on their functions.

研究了具有抗AS功效的银杏叶提取物、香豆素提取单体作用后泡沫细胞蛋白质组的变化情况。

The company mainly produces cinnamaldehyde, cinnamic acid, cinnamic alcohol, cinnamic nitriles,-bromo-cinnamic aldehyde, amyl cinnamic aldehyde, acetic acid Gui ester, cinnamic acid acetate, L-carnitine, coumarin , vitamin B1 and so on, one of cinnamon products only amounted to more than 100 kinds of quality and technical content are up to domestic advanced level, is expected to reach an annual output value of 10 billion yuan.

公司主要生产肉桂醛、肉桂酸、肉桂醇、肉桂腈、α-溴代肉桂醛、戊基肉桂醛、乙酸桂酯、肉桂酸乙脂、左旋肉碱、香豆素、维生素B1等，其中仅肉桂系列产品就达100多种，其质量及技术含量均达到国内先进水平，预计年产值可达10亿元人民币。

The company mainly produces benzaldehyde, cinnamic aldehyde, cinnamic acid, cinnamic alcohol, cinnamic nitriles,-bromo-cinnamic aldehyde, amyl cinnamic aldehyde, acetic acid Gui ester, cinnamic acid acetate, L-carnitine, coumarin, vitamin B1, etc., of which only cinnamon series reached more than 100 kinds of products, its quality and technical content are up to domestic advanced level, is expected to reach an annual output value of 10 billion yuan.

公司主要生产苯甲醛、肉桂醛、肉桂酸、肉桂醇、肉桂腈、α-溴代肉桂醛、戊基肉桂醛、乙酸桂酯、肉桂酸乙脂、左旋肉碱、香豆素、维生素B1等，其中仅肉桂系列产品就达100多种，其质量及技术含量均达到国内先进水平，预计年产值可达10亿元人民币。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。