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黄酮化合物与AlCl3生成的铝络合物的相对稳定性最大的是()

发布日期:2020-08-20

黄酮化合物与AlCl3生成的铝络合物的相对稳定性最大的是()
A

黄酮的5-羟基

B

黄酮醇的3-羟基

C

二氢黄酮的5-羟基

D

邻二酚羟基

E

二氢黄酮醇的3-羟基

试题解析

相对稳定性

稳定性是控制系统重要的性能指标之一,是系统正常工作的首要条件。稳定性包括绝对稳定性和相对稳定性,相对稳定性表征系统的稳定程度。对于线性定常系统而言,系统的相对稳定性通常用稳定性裕量进行定量衡量。

中文名
相对稳定性
类型
性能指标
外文名
relative stability
指示内容
频率域内表征控制系统稳定性裕量

黄酮化合物

黄酮化合物是一类存在于自然界的、具有2-苯基色原酮(flavone)结构的化合物。它们分子中有一个酮式羰基,第一位上的氧原子具碱性,能与强酸成盐,其羟基衍生物多具黄色,故又称黄碱素或黄酮。黄酮化合物在植物体中通常与糖结合成苷类,小部分以游离态(苷元)的形式存在。绝大多数植物体内都含有黄酮化合物。

中文名
酮化合物
定义
一类存在于自然界的、具有2-苯基色原酮(flavone)结构的化合物

生成

生成,是个使用频率很高的词汇,具有长成、形成、养育等意思。在实际生活应用当中,根据不同环境,其意思有很大扩展。

中文名
生成
释义
养育;长成
拼音
shēng chéng
相关资料
《晋书·应詹传》《屏迹》

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此试题出现在

药学正副高

中药学(医学高级)

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