【摘 要】
：
Chenopodium album Linn is a favorite vegetable in folk,which belongs to the Chenopodiaceae family.In this work,four sesquiterpenes (1-4) (Figure 1) were isolated from C.album Linn for the first rune.T
【机 构】
：
Nanyang Normal University,College of Chemistry and Pharmaceutical Engineering
【出 处】
：
中国化学会第十一届全国天然有机化学学术会议
论文部分内容阅读
Chenopodium album Linn is a favorite vegetable in folk,which belongs to the Chenopodiaceae family.In this work,four sesquiterpenes (1-4) (Figure 1) were isolated from C.album Linn for the first rune.They were identified as arecolactone (1)[1],4α,8β-dihydroxyeudesm-7(11)-en-12.8-olide (2)[2].stereumin P (3)[3].and lyophyllanetriol A (4)[4]by their extensive spectroscopic data and the reported data in literature.
其他文献
With more than 60%of input energy being lost,most of it as waste heat,there is a compelling need for high performance thermoelectric materials that can directly and reversibly convert heat to electric
具有层状结构的二维晶体,即过渡金属硫属化合物MX2(M=Mo,W；X=S,Se)由于地球储量丰富和良好的催化活性成为电催化制氢领域的研究重点.对于二维MoSe2催化体系,其活性位点与电输运性共同决定MoSe2的催化活性,晶体无序度可以增加二硒化钼纳米片的活性位点1.然而,本征2H相的钼硒化合物的电输运性较差(半导体),若仅从晶体无序度方面对活性位点进行优化,对析氢效率的提高仍然相当有限,而理想的改
通过固相反应法合成了空位比例为1∶1的反钙钛矿化合物Mn3GaxNx(x=0.5,0.6,0.7),并利用第一性原理计算了Mn3GaxNx(x=0.5,0.6,0.7)的在低温下的磁性.XRD结果表明当占位率x小于0.5时材料中将出现Mn3Ga等其他杂相,因此Mn3GaxNx的空位极限为0.5,当占位率x大于0.5时材料的晶格常数随占位率增加而增大.
作为一种新型电催化析氢(HER)材料,二维晶体过渡金属硫属化合物MoS2由于其特殊的结构特性和理化特性引起了研究者的广泛关注.围绕MoS2的热力学稳态2H相已有大量富有成效的理论和实验工作,然而针对其亚稳态1T-MoS2的微观结构-催化关系仍存在较大争议,主要表现在对1T相中的边缘态原子的催化贡献认识不清,尤其是缺陷在1T相中的催化作用缺乏深入研究1；从材料设计的角度来看,构造1T-富缺陷的材料结
Ninteen phenylpropanoids,including one new (1) and eighteen known phenylpropanoids (2-19) were isolated and identified from n-butyl alcohol-soluble fraction of the 70% ethanol extracts from the fruits
狗牙花[Ervatamia divaricata (L,) Burk.cv.Gouyahua]为夹竹桃科(Apocynaceae)狗牙花属植物,又名白狗牙、狮子花、豆腐花等,民间用其根治疗头痛和骨折,其叶有降低血压功能、清凉解热、利水消肿等功效[1].该药用植物资源丰富,广泛栽培于亚洲热带及亚热带地区.前期研究[2]表明,该属植物富含骨架复杂、结构多样的单萜吲哚类生物碱,尤其是依波加因型生物碱.依
Objective: To characterize morpho-anatomically the Gall of Quercus infectoria Oliv (Fagaceae),explore and establish the micromorphology and quality control methods for this plant.Methods: Macroscopic
豆瓣绿Peperomia tetraphylla (Forst.f.)Hook.et Am.为胡椒科草胡椒属植物，分布于美洲、大洋洲、非洲及亚洲热带和亚热带地区，我国产于台湾、福建、广东、广西、贵州、云南、四川及甘肃南部和西藏南部[1].味辛、苦；性微温，归肺、肝、脾经.具有舒筋活血、祛风除湿、化痰止咳的功效，主治风湿筋骨痛、跌打损伤、疮疖肿毒、咽喉炎、口腔炎、痢疾等疾病[2].本课题组采用高效液