查询词典 kaempferol

Methods: Solubility and water oil distribution coefficient of the complex were studied, and compared with kaempferol-3-O-rutinoside.

制备山萘酚－3-O-芸香糖苷的磷脂复合物，测定其与山萘酚－3-O-芸香糖苷的溶解度，并对两者的水油分配系数进行分析。

Objective: To estabilish an RP-HPLC method for the determination of kaempferol, naringenin and quercetin in Euonymus alatus Thunb.

目的：建立同时测定鬼箭羽中降糖活性成分山柰酚、柚皮素及槲皮素含量测定的方法。

Flavonoids are abundant, including apigenin, galangin, kaempferol, luteolin, pinocembrin, pinostrobin and quercitin.

类黄酮十分丰富，包括芹黄素，高良姜精，山奈酚，毛地黄黄酮等。

Their structures were identified by physico-chemical properties and spectral analysis. RESULTS Seven compounds were isolated as kaempferol,quercetin,astragalin,isoquercitrin,kaempferol-3-O-β-D-glucuronic acid methyl ester,4-hydroxybenzonic acid,hentriacontane.

结果分离得到7个已知化合物，分别为山柰酚、槲皮素、山柰酚-3-O-β-D-吡喃葡萄糖苷、槲皮素-3-O-β-D-吡喃葡萄糖苷、山柰酚-3-O-β-D-吡喃葡萄糖醛酸甲酯、对羟基苯甲酸、三十一烷。

On the basis of spectral analysis, these compounds were identified as Kaempferol , Kaempferol-3-O-β-D-glucopyranoside , Kaempferol-3-O-β-D-galactopyranoside, Quercetin , Quercetin-3-O-β-D-arabinopyranoside, Quercetin-3-O-β-D-galactopyranoside, gallic acid, methyl gallate-4-O-β-D- galactopyranoside, caffeicacid, methyl caffeate, 4-cafeoyl-(3"a, 4"a, 5"β)- trihydroxyquinic acid, 3"-cafeoyl-(3"a, 4"P, 5"P )-trihydroxyquinic acid methyl ester, 5"-cafeoyl-galactonic acid , pumiloside, loganic acid , 5R,6S,7E-megastima-3-on-7-en-9-ol 9-O-β-D-glucopyranoside. 2a, 3β-dihydroxy-oleanoic acid , 2a, 3β, 23-trihydroxy-oleanoic acid, 3a, 6a-dihydroxy-oleanoic acid, 3β-hydroxy-ursoic acid, 2a, 3a, 23-trihydroxy-ursoic acid , 2a, 3β, 23-trihydroxy-ursoic acid, 2β, 3β, 19a -trihydroxy-ursoic acid, 2a , 3β, 19a -trihydroxy-ursoic acid-28-O-β-D-glucopyranoside , 2a. 3a, 19a-trihydroxy-ursoic acid-28-O-β-D-glucopyranoside, 2a, 3a, 19a, 23-tetrahydroxy-ursoic acid, 1a, 3a, 19a, 23-tetrahydroxy-ursoic acid-28-O-β-D-glucopyranoside , 3a, 19a, 23-trihydroxy-ursoic acid.

从珙桐中分离鉴定得到了28种化合物，它们分别是：山奈酚，3-O-β-D-吡喃葡萄糖基-山奈酚甙，3-O-β-D-吡喃半乳糖基-山奈酚甙，槲皮素，3-O-β-D-吡喃阿拉伯糖基-槲皮素甙，3-O-β-D-吡喃半乳糖基-槲皮素甙，没食子酸，4-O-β-D-吡喃半乳糖基-没食子酸甲酯，咖啡酸，咖啡酸甲酯，4-咖啡酰基-(3&α，4&α，5&β)-三羟基鸡纳酸，4-咖啡酰基-(3&α，4&β，5&β)-三羟基鸡纳酸甲酯，5'-咖啡酰基-半乳糖酸，pumiloside，loganic acid，5R，6S，7E-megastima-3-on-7-en-9-ol9-O-β-D-glucopyranoside，2α，3β-二羟基齐墩果酸，2α，3β，23-三羟基齐墩果酸，3α，6α-二羟基齐墩果酸，3β-羟基熊果酸，2α，3α，23-三羟基熊果酸，2α，3β，23-三羟基熊果酸，2β，3β，19α-三羟基熊果酸，2β，3β，19α-三羟基熊果酸-28-O-β-D-吡喃葡萄糖甙，2α，3α，19α-三羟基熊果酸-28-O-β-D-吡喃葡萄糖基甙，2α，3α，19α，23-四羟基熊果酸，2α，3α，19α，23-四羟基熊果酸-28-O-β-D-吡喃葡萄糖基甙，3α，19α，23-三羟基熊果酸。

By the quantitative analysis of flavonoids from the extract under acid hydrolysis condition, it is demonstrated that the level of isoquercitrin degrades along with the content of hydrochloric acid elevating and the level of kaempferol is reverse. Those reveal that there exist flavonoid conjugates whose aglycone is kaempferol in the leaves.

对青钱柳酸水解液中成分的测定表明，随着酸浓度的提高，异槲皮苷的含量下降，槲皮素的含量上升，山奈酚的含量也随酸浓度上升而增高，表明青钱柳中尚有以山奈酚为苷元的黄酮苷存在。

There were no significant differences in contents of quercetin, isoquercitrin and kaempferol in the fronds, and also no significant differences in contents of rutin, quercetin, kaempferol and total flavonoids in the roots of the three plants studied under the same As treatment.

结果表明：在相同As浓度处理条件下，叶片中槲皮素、异槲皮甙和山奈酚的含量不存在显著差；根部芸香苷、槲皮素、山奈酚和总黄酮含量也不存在显著差异。

The electrospray ionization mass spectrometry was used to study the fragmentation pathway of kaempferol. The fragmentation pathway of kaempferol was also theoretically studied by means of Density Functional Theory.

采用电喷雾质谱技术对山奈酚的质谱过程进行了表征，并用量子化学方法对山奈酚的质谱裂解途径进行了理论研究。

The theoretical plate numbers of kaempferol and quercetin were 5 121 and 6 673, the resolution between kaempferol, quercetin and impurities were 1.96 and 5.32, respectively.

该方法精密度、重现性和分离效果好，分析快速准确，适合于该药材及提取物中山柰酚和槲皮素含量的测定，不同产地两成分均存在一定的差别。

On the basis of spectroscopic analysis and comparison with the reported data, they were identified as kaempferol-3-O-β-D-glucoside, kaempferol 3-O-β-D-6-p-hydroxycoumaroylglucoside, L-2-O-methyl chiro-insitol and phillyrin.

叶的95%乙醇提取物中分离得到了4个化合物，经波谱分析，其结构分别鉴定为山萘酚－3-O-β-D-葡萄糖苷、山萘酚－3-β-D-（6-对羟基桂皮酰基）葡萄糖苷、L-2-O-甲基－手－肌醇和连翘苷。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。