共查询到19条相似文献,搜索用时 78 毫秒
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目的为充分利用大戟科叶下珠资源,优选叶下珠有效成分总多酚的提取工艺。方法以总多酚含量考察为指标,使用酶法进行提取,采用正交设计法对工艺条件进行优化,普鲁士蓝法进行总多酚含量测定。结果总多酚最佳提取工艺:时间为2 h、温度为60℃、加酶量为1.5%p、H 5.5、液料比为50,总多酚提取率9.74%。结论方法简单可行,优于传统的溶剂提取法,可作为叶下珠总多酚的提取工艺。 相似文献
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目的:研究水杨梅根多酚化合物的主要组成成分。方法:对水杨梅根水提液进行乙酸乙酯萃取,萃取液经硅胶柱层柱结合薄层定性鉴别,将分离的成分经气相色谱-质谱联用法分析其结构。结果:分离纯化得到2个成分,均为儿茶素类化合物。结论:水杨梅根多酚化合物主要由儿茶素类化合物组成。 相似文献
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目的:建立基于聚类分析和主成分分析的不同产地叶下珠多酚部位高效液相色谱(HPLC)指纹图谱分析方法。方法:采用HPLC法测定9个不同产地叶下珠多酚部位指纹图谱,对其进行相似度分析、聚类分析和主成分分析,高效液相色谱-质谱(HPLC-MS)指认主要成分。结果:叶下珠多酚部位指纹图谱检出7个共有峰,指认了其中5个共有峰,9个不同产地叶下珠多酚部位相似度达到0.972-0.998,聚类分析和主成分分析从化学成分上说明了9批样品的相似性及差异性。结论:以指纹图谱数据为基础,将聚类分析与主成分分析结合起来进行识别,为叶下珠药材的资源利用提供依据。 相似文献
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本文就叶下珠注射液的配制方法及其稳定性的影响因素进行了研究探讨。结果表明:杂质沉淀剂、溶液的PH值以及抗氧剂对叶下珠注射液稳定性具有较大的影响,采用壳聚糖澄清剂既能较有效地除去杂质,又不引起有效化学成分丢失,因而能保证叶下珠注射液的化学稳定性。 相似文献
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Ye Wu Shuang-shuang Xie Zheng-xi Hu Zhao-di Wu Yi Guo Jin-wen Zhang Jian-ping Wang Yong-bo Xue Yong-hui Zhang 《中草药(英文版)》2017,9(2):193-196
Objective To study the chemical constituents of whole plant of Phyllanthus urinaria and their biological activity.Methods The chemical constituents were isolated and purified by repeated column chromatography over silica gel,Rp-C_(18)(reverse phase),MCI,and Sephadex LH-20,as well as semi-preparative HPLC.NMR spectroscopic analyses were used for the structure identification.In this case,the inhibitory rate of NO production of the isolated triterpenoids was evaluated.Results Seven triterpenoids,identified as28-norlup-20(29)-ene-3,17β-diol(1),betulin(2),β-betulinic acid(3),3-oxofriedelan-28-oic acid(4),oleanolic acid(5),3R-E-coumaroyltaraxerol(6),and 3R-Zcoumaroyltaraxerol(7),were isolated and identified from the whole plants of P.urinaria.Compounds 1-5 exerted inhibitory effects against NO production in LPS-induced RAW264.7 mouse macrophages with the inhibitory rate of NO production ranging from 4.0%to 27.8%at the concentration of 25 μmol/L.Conclusion To the best of our knowledge,this is the first report of compounds 1-4,6,and 7 from the family Euphorbiaceae.Compounds 1-5 exhibited inhibitory effects against NO production in LPS-induced RAW264.7 mouse macrophages. 相似文献
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目的观察叶下珠复方药物血清对人肝癌HePG2细胞体外增殖的抑制作用并探讨其机制。方法用叶下珠复方药物血清处理HePG2人肝癌细胞株,MTT法检测该药对肝癌细胞株增殖的抑制作用,用流式细胞仪检测该复方诱导肿瘤细胞凋亡情况。通过RT-PCR检测该药对细胞信号传导和转录激活因子3(STAT3)及其下游靶基因bcl-2的表达。结果叶下珠复方药物血清对HePG2细胞有抑制增殖和促进凋亡作用,该抑制作用与药物呈时间浓度关系。不同浓度的叶下珠复方处理HePG2细胞后bcl-2、stat3的mRNA水平明显下调(P0.05)。结论叶下珠复方在体外能抑制肝癌细胞增殖,促进其凋亡,其机制可能与抑制肿瘤细胞增殖的不同信号通路有关。 相似文献
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叶下珠提取工艺的研究 总被引:4,自引:0,他引:4
目的优选叶下珠的提取工艺.方法采用正交试验法,以总黄酮含量为检测指标优选叶下珠提取工艺的最佳条件.结果影响提取的主次因素为D>A>B>C(A为乙醇浓度,B为乙醇用量,C为提取时间,D为提取次数).最佳提取条件为7倍量70%乙醇,提取3次,每次2 h.结论优选得到的工艺稳定可行. 相似文献
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目的研究在人工栽培条件下,珍珠草的种植方法、生长条件、生长规律,探讨大面积人工栽培的可能性,为总结珍珠草的GAP技术打下基础。方法采用种子繁育和人工移栽相结合的方法,比较野生与家种,人工栽培、种子种植与幼苗移栽种植等的生长规律、生长条件、产量等。结果在人工栽培条件下,珍珠草的各项指标均优于野生;采用种子繁育与人工移栽相结合的栽培方法明显优于单纯种子种植。结论广东省云浮地区适合珍珠草的人工种植,栽培试验成功。 相似文献
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Hippomanin A from acetone extract of Phyllanthus urinaria inhibited HSV-2 but not HSV-1 infection in vitro 总被引:1,自引:0,他引:1
Phyllanthus urinaria Linnea (Euphorbiaceae) is a commonly used traditional medicinal plant in oriental countries and has been reported to possess various biological activities. Previously, the acetone extract and some pure compounds from P. urinaria were found to suppress herpes simplex virus (HSV). In this study, another two pure compounds were isolated from acetone extract of P. urinaria and were tested for their in vitro anti-HSV-1 and HSV-2 activities. The results showed that hippomanin A impeded HSV-2 but not HSV-1 infection. Corilagin, however, inhibited neither HSV-1 nor HSV-2 replication. The similarity between corilagin and hippomanin A in structure, but difference in antiviral activity, therefore, merit further investigation. 相似文献