Antioxidant activity of Ziziphora tenuoir methanolic extracts and comparison of the essential oil in

来源 :Chinese Journal of Natural Medicines | 被引量 : 0次 | 上传用户:hcai5188
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Flavonoids, anthocyanins, antioxidant capability, total phenolic, ascorbic acid contents, and essential oils compounds of Ziziphora tenuoir(Lamiaceae) for polar and non-polar subfraction in different stages of growth(pre-flowering and flowering) were evaluated in this work. Antioxidant activities of the samples were determined by three testing systems namely DPPH, β-carotene/linoleic acid, and reducing power assay. In the DPPH system, the highest radical scavenging activity was seen by the nonpolar subfraction of the methanol extract in the flowering stage(IC50 43.17 ± 3.68 μg·mL–1). Large differences in the amount of phenolic compounds, antioxidant activity, anthocyanins, and flavonoids of Z. tenuoir in two stages of growth were detected. The chemical composition of the hydrodistilled essential oil of the aerial parts of Z. tenuoir was analyzed by GC/MS and compared in the two stages of growth. The main constituents of the 28 identified compounds in the oil were found to be pulegone(67.34% vs 59.61%), β-humulene(3.24% vs 3.25%), and limonene(5.06% vs 2.57%) at the flowering and pre-flowering stages, respectively. Flavonoids, anthocyanins, antioxidant capability, total phenolic, ascorbic acid contents, and essential oil compounds of Ziziphora tenuoir (Lamiaceae) for polar and non-polar subfraction in different stages of growth (pre-flowering and flowering) were as in this work. Antioxidant activities of the samples were determined by three testing systems in DPPH, β-carotene / linoleic acid, and reducing power assay. The DPF system was the most radical scavenging activity was seen by the nonpolar subfraction of the methanol extract in the flowering stage ( IC50 43.17 ± 3.68 μg · mL-1). Large differences in the amount of phenolic compounds, antioxidant activity, anthocyanins, and flavonoids of Z. tenuoir in two stages of growth were detected. The chemical composition of the hydrodistilled essential oil of the aerial parts of Z. tenuoir was analyzed by GC / MS and compared in the two stages of growth. The main constituents of the 28 identified compounds in the oil were found to be pule (67.34% vs 59.61%), β-humulene (3.24% vs 3.25%), and limonene (5.06% vs 2.57%) at the flowering and pre-flowering stages, respectively.
其他文献
脑脊液漏是经蝶窦手术后常见并发症,如不能妥善处理则可能引起张力性气颅、颅内感染等严重后果.我们自1994年3月至2004年4月采用经单侧鼻腔蝶窦入路手术治疗垂体腺瘤1500例,其中129例发生不同程度的脑脊液漏.现将该并发症发生的原因、预防方法和治疗方案总结如下。
本文采用发射光谱法诊断了大气压下Ar气、SiCl4及H2气混合气体(Ar/SiCl4/H2)射频放电等离子体射流特性.利用Si原子谱线强度计算了电子激发温度并以此估算了Si原子数密度,研究
针对高寒地区公路用水泥稳定沙砾基层材料,进行不同水泥剂量、级配和成型方式条件下的水泥稳定砂砾抗冻性试验,研究其抗冻性能的变化规律,并运用灰熵法分析各影响因素的显著
Mark Dunhill是叼着金勺子出生的,这样说,绝对不过分。不是每个人都有幸出生在一个非常成功的家族中,所以,从Mark出生的那天起,大家就关注着这位Dunhill家族的第三代承继者
色彩技巧应该从以下几点注意:一是色彩与包装物的照应关系,二是色彩和色彩自身的对比关系。这两点是色彩运用中的关键所在。(一)色彩与包装物的照应那么,作为色彩与包装物的
此文着重分析了覆铜钢件表面水珠低温辐射烘干的机理。由斯忒藩——玻耳兹曼定律R=ε_ΤσΤ~4的辐射出射度知,射度的大小与ε_Τ、Τ有关,而围系ε_Τ的大小提出了吸收物λ
在16840cm-1-16860cm-1内测量了NO2分子的塞曼调制光谱(ZMS),得到了相对简化的NO2分子光谱的转动结构,解释了塞曼调制光谱的形成原因和它的主要特征.表明ZMS光谱技术有助于对NO2复杂的转动结构进行标识。 The Zeeman
作为纪传体通史的鼻祖,《史记》在中国古代史学史和文学史上产生了很大影响。汉代以来,历代都有不少学者对《史记》进行研究,可以说我们今天的《史记》研究就是在前代研究成
采用电子束蒸发方法在LiB3O5(LBO)晶体上制备了无缓冲层和具有不同缓冲层的1064nm,532nm倍频增透膜。利用Lambda900分光光度计、MTS Nano Indenter纳米力学综合测试系统以及
AIM: The hypoglycemic and hypolipidemic effects of the methanol extract of Brassica oleracea var. capitata(MEB) was evaluated in alloxan-induced diabetic rabbit