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1.
采用超高效液相色谱-四极杆串联飞行时间质谱(UPLC-Q-TOF MS)建立生、制广佛手的指纹图谱,并通过化学模式识别方法分析两者的差异成分。采用Agilent Poroshell 120 EC-C18(3.0 mm × 150 mm × 2.7 μm)色谱柱进行分离,以0.1%甲酸 + 5 mmol/L乙酸铵水溶液-乙腈为流动相进行梯度洗脱,离子源为电喷雾电离源(ESI),在正、负离子模式下采集数据。根据分子离子峰精确质量数、二级谱图等信息,结合文献和化合物数据库并经标准品验证,共鉴定生、制广佛手中37个化学成分,包括:10个黄酮及黄酮苷类、4个香豆素类、12个有机酸类、5个糖苷类、2个柠檬苦素类及4个其它类。将采集的UPLC-Q-TOF MS数据整理并导入“中药色谱指纹图谱相似度评价系统(2004A)”软件,分别建立生、制广佛手的指纹图谱,其中生广佛手确定了24个共有峰,识别和鉴定出19个峰成分;制广佛手确定了22个共有峰,识别和鉴定出14个峰成分。将数据预处理后,以SIMCA-P软件建立主成分分析(PCA)与正交偏最小二乘法判别分析(OPLS-DA)统计模型,分析生、制广佛手的差异成分。PCA结果显示生、制广佛手区分明显,表明生广佛手炮制后的化学成分发生变化;采用OPLS-DA法筛选显著性差异成分为:诺米林酸、5-异戊烯氧基-7-甲氧基香豆素、棕榈酸、油酸、水合氧化前胡素,其中5-异戊烯氧基-7-甲氧基香豆素的相对含量变化最显著,可作为区分生、制广佛手的化学标志物。该研究可为生、制广佛手的质量标准以及药效学研究提供数据支持。  相似文献   

2.
采用微波和超声波联合提取技术提取川佛手中的黄酮.通过对大孔吸附树脂种类和洗脱液浓度条件优化,获得了最佳实验参数.在此基础上,选择D101树脂,通过石油醚、水和无水乙醇梯度洗脱对川佛手黄酮粗提物进行了分离纯化,得到川佛手黄酮纯化物纯度为92.65%.将川佛手黄酮粗产物、纯化产物、Vc和芦丁进行了抗氧化比较研究,川佛手黄酮纯化产物对DPPH·和·OH的清除率分别可达到82.22%和69.46%,结果表明川佛手黄酮纯化产物具有较好的清除自由基能力和较强的抗氧化活性.  相似文献   

3.
佛手多糖的化学组成及体外抗氧化活性研究   总被引:8,自引:0,他引:8  
佛手经热水提取和乙醇沉淀,得佛手多糖粗品(BP).BP经Servag法除蛋白,用DEAE离子交换柱梯度洗脱分离得到BP1和BP2两个组分,经凝胶色谱和SDS-聚丙烯酰胺凝胶电泳检验为均一组分.用凝胶渗透色谱法测得BP1和BP2的重均分子量分别为17773和65589.薄层色谱和高效液相色谱分析表明,BP1和BP2均由鼠李糖、甘露糖、葡萄糖、半乳糖和木糖组成.采用化学发光法在多种化学模拟体系中研究了佛手多糖清除活性氧的作用,观察了佛手多糖对HO.导致DNA链损伤的抑制作用.结果表明,佛手多糖能有效地清除O2-.和HO.等活性氧,对DNA链具有良好的保护作用.  相似文献   

4.
建立了一种同时测定五指毛桃水提取液中补骨脂素和佛手内酯的高效液相色谱-电喷雾串联质谱法(HPLC-ESI MSn),并对液-液微萃取前处理方法的影响因素进行了探讨.在优化条件下,补骨脂素在0.55~2200μg·L-1范围内线生关系良好(r=0.9999),佛手内酯在1.00~4000μg·L-1范围内线性关系良好(r...  相似文献   

5.
采用微波和超声波提取技术,实现了川佛手中多酚类物质的有效提取.在微波功率800 W和微波提取时间40 min的条件下,通过单因素实验条件优化,考察了超声功率、乙醇浓度、提取温度、超声时间和提取料液比对提取效率的影响;通过正交试验设计,确定了最佳提取工艺条件参数,即超声功率800 W、乙醇体积分数60%、提取温度55℃、超声时间1.0 h和提取料液比1∶20 g/m L;通过验证实验,得到川佛手多酚的提取率约为20.79 mg/g.  相似文献   

6.
赵默涵  刘志强  耿爱芳  谢文兵 《应用化学》2018,35(11):1391-1398
近年来,无花果叶片中所含成分分析主要集中在同类型物质或整类物质,而对多种类型单一有效物质的定性定量研究较少。 本文采用溶剂浸提-超声波辅助法对无花果叶片中的有效成分进行了提取,利用气相色谱-质谱和超高效液相色谱-离子阱质谱对有效成分进行了鉴定。 结果表明,无花果叶中主要成分为绿原酸、芦丁、补骨脂素和佛手苷内酯。 采用单因素实验法,确定了4种成分的最佳提取工艺。 利用高效液相色谱建立了绿原酸、芦丁、补骨脂素和佛手苷内酯的定量分析方法。 绿原酸在1.84~9.2 μg范围内有良好的线性关系(R2=0.9991),回收率为95.2%;芦丁在3.4~17 μg范围内有良好的线性关系(R2=0.9981),回收率为96.8%;佛手内脂在4~20 μg范围内有良好的线性关系(R2=0.9998),回收率为89.5%;补骨脂素在4~20 μg范围内有良好的线性关系(R2=0.9963),回收率为87.1%。  相似文献   

7.
从中药佛手中分离鉴定两个柠橡油素二聚体   总被引:1,自引:0,他引:1  
用IR,NMR和X-射线晶体衍射分析了从佛手中分离出来的两个柠檬油素二聚体,证明它们的化学结构分别是顺式头-尾-3,3',4,4'-柠檬油素二聚体(1)和顺式头-头-3,3'-4,4'-柠檬油素二聚体(2),通过光反应从柠檬油素制备了1和反式头-头-3,3',4,4'-柠檬油素二聚体(3).  相似文献   

8.
佛手挥发油的化学成分   总被引:25,自引:0,他引:25  
用色谱-质谱-计算机联用法对佛手挥发油的化学成分和相对含量进行了系统分析,得到67种组分,鉴定出31个组分,主要组分是柠檬烯(48.4%)、1-甲基-2-(1-甲乙基)-苯(30.8%)。  相似文献   

9.
天佛参口服液是一种纯中药抗癌新药。该药由西洋参、天冬、佛手等8味中药组成,具有养阴益气解毒散节的功能,主要用于非小细胞肺癌属气阴两虚证患者,对神疲乏力、口干咽燥、气急、痰血、胸痛等症状的治疗作用明显,在对肿瘤的辅助治疗方面居国内领先水平[1]。中药作为中华医学的瑰宝日益引起全世界的重视,但由于诸多因素导致其出口占  相似文献   

10.
从中药佛手中分离鉴定两个柠檬油素二聚体   总被引:5,自引:0,他引:5  
用 IR、NMR和X-射线晶体衍射分析了从佛手中分离出来的两个柠檬油素二聚体,证明它们的化学结构分别是顺式头-尾-3,3′,4,4′-柠檬油素二聚体(1)和顺式头-头-3,3′,4,4′-柠檬油素二聚体(2)。通过光反应从柠檬油素制备了1和反式头-头-3,3′,4,4′-柠檬油素二聚体(3)。  相似文献   

11.
In this study, four fruit’s seed samples as Punica granatum L., Citrus medica var. limonum, Malus domestica L. and Citrus vulgaris Risso were prepared from Arak’s markets. They were analyzed using instrumental neutron activation method (INAA). In this method, Tehran research reactor as a neutron source and relative INAA method has been used as the analysis method and to record gamma ray spectrum, the high purity germanium detector was used. Pomegranate seeds had the highest number of essential elements. Apple seeds and sour orange seeds contain the highest levels of Mg and K, Respectively.  相似文献   

12.
Two new cyclic peptides were isolated from the fruit peels of Citrus medica var. sarcodactylis SWINGLE. Their structures were elucidated as cyclo(-Gly-Asp-Leu-Thr-Val-Tyr-Phe-) and cyclo(-Gly-Leu-Pro-Trp-Leu-Ile-Ala-Ala-) by intensive two-dimensional (2D) NMR analysis and chemical evidence.  相似文献   

13.
Citrus tristeza virus (CTV) extracted from Etrog citron (C.medica L.) was immunoprecipitated. The immunoprecipitate was fractionated by SDS-PAGE and western blotted onto nitrocellulose. The CTV antigens were determined by immunoblot analysis using rabbit anti-CTV IgG, and the protein-band pattern exhibited on the nitrocellulose was assessed by soft-laser scanning densitometry. The densitometric tracing revealed the presence of bands that were not visible to the naked eye. Using the superimposition mode of the instrument, it was also revealed that the protein-band patterns of different CTV samples were not identical. Computer-aided soft-laser scanning densitometry proved to be a powerful approach in the detection and assessment of protein bands revealed on nitrocellulose immunoblots, which we were previously unable to do employing conventional methods.  相似文献   

14.
The chemical composition of the essential oil of Citrus medica L. cv. Diamante peel obtained by hydrodistillation, cold-pressing and supercritical carbon dioxide extraction techniques was determined by GC/MS analysis. Forty-six components were fully characterised. Limonene and γ-terpinene were the major components of the oils obtained by hydrodistillation (HD) and cold-pressing (CP), while citropten was the major constituent in the oil obtained by supercritical carbon dioxide extraction (SFE). Acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activities were evaluated. The essential oil obtained by hydrodistillation exerted the highest inhibitory activity against BChE (IC?? value of 154.6 μg mL?1) and AChE (IC?? value of 171.3 μg mL?1. Interestingly, the oil obtained by cold-pressing exhibited a selective inhibitory activity against AChE. The essential oils have also been evaluated for the inhibition of NO production in LPS induced RAW 264.7 macrophages. The oil obtained by hydrodistillation exerted a significant inhibition of NO production with an IC?? value of 17 μg mL?1 (IC?? of positive control 53 μg mL?1).  相似文献   

15.
Citrus species are rich sources for various bioactive compounds such as flavonoids, adrenergic amines, limonoids, and coumarins. Six adrenergic amines and 20 flavonoids in the jams and juices of Citrus species were analyzed by high-performance liquid chromatography with a C18 reversed-phase column using gradient mobile phase of sodium acetate buffer (pH 5.5) and acetonitrile at a flow rate of 1.0 mL/min with detection at 254, 280, and 330 nm. Synephrine was present in levels from 3.65 to 60.66 mg/L in 48 Citrus juices and 0.018-1.02 mg per serving in 32 Citrus jams. The content of these amines and flavonoids varied to a large extent depending on the type of the Citrus species used. The method has been successfully applied to the determination of adrenergic amines and flavonoids in several samples of Citrus fruit juices and jams.  相似文献   

16.
The commercial essential oils of Citrus aurantium L., Cupressus sempervirens L., Eucalyptus globulus Labill., Foeniculum vulgare Mill. and Thymus vulgaris L., isolated by steam distillation by a company of Morocco were evaluated in terms of in vitro antioxidant activity through several methods. In vitro acetylcholinesterase inhibitory activity was also determined. Citrus limon (L.) Burm. f. oil was also studied, but it was obtained by peel expression. The best antioxidant was T. vulgaris oil, independent of the method used, mainly due to the presence of the phenolic monoterpenes thymol and carvacrol, which when studied as single compounds also presented the best activities. Concerning the acetylcholinesterase inhibition activity, E. globulus was the most effective. Nevertheless its main components 1,8-cineole and limonene were not the most active, a feature that corresponded to d-3-carene.  相似文献   

17.
The fumigant action of peel essential oils of Citrus sinensis var. pear (pear orange = PO) and C. aurantium (bitter orange = BO) from the northeast of Brazil were evaluated against Bemisia tabaci biotype B and compared with eugenol as a positive control. The oil concentration in the PO at 8.5 microL/L of air caused 97% mortality, while the oil concentration of BO at 9.5 microL/L of air caused 99% mortality. However, the LC50 estimates for both oils (LC50 = 3.80 microL/L of air for PO and LC50 = 5.80 microL/L of air for BO) did not differ from each other, but they did when compared with eugenol (LC50 = 0.20 microL/L of air). Regarding their effects on oviposition, the Citrus oils showed concentration-response dependence, reducing the number of eggs as the concentration increased, which was not observed for eugenol. The minimum concentrations of the oils that caused a significant reduction in the egg lay were 3.5 and 7.0 microL/L of air for BO and PO, respectively. These results suggest that oils from PO and BO peels may be promising as models to develop new insecticides that might be applied into the integrated management of whiteflies.  相似文献   

18.
Citrus aurantium L. var. amara Engl is a member of genus Citrus (Rutaceae) and has been used in Chinese medicine with the effectiveness of digestant and expectorant. Ultrasonic‐assisted extraction process for maximum flavonoids from the flower of Citrus aurantium L. var. amara Engl was investigated by response surface methodology. Through single factor experiment, ranges of the main variables (including ethanol concentration, solid/liquid ratio, extraction time and temperature) affecting the extraction yield of flavonoids were confirmed. Box–Behnken central composite design consisting of 24 experimental runs and 5 replicates at zero point was then applied and a regress model was obtained to predict the optimal extraction yield. The ANOVA indicated that the regression equation fits very well with the actual situation, reflecting the relationship between the extraction yield of flavonoids and extraction conditions. The optimal conditions were as follows: extraction temperature 72.11°C, time 51.89 min, ethanol concentration 51.19% and liquid/solid ratio of 40:10. Under the optimal conditions, the maximum response value of yield (1.88%) was consistent with the experimental value (1.87%), indicating the feasibility and validation of response surface methodology in optimizing the extraction of flavonoids from the flower of Citrus aurantium L. var. amara Engl.  相似文献   

19.
Summary A comprehensive sampling of organic and conventional oranges was carried out in Bebedouro, an important citrus producing region of Brazil. The soils, leaves and fruits of the variety Valencia (Citrus sinensis [L.]Osbeck) budded on Rangpur lime (Citrus limonia Osbeck) were analyzed. The chemical characterization was accomplished by instrumental neutron activation analysis (INAA). Indications for a difference between organic and conventional orange juices and leaves were obtained by applying univariate and multivariate statistical analysis. There were differences between samples for Br, Co, Cs, La and Rb from both systems.  相似文献   

20.
灰色系统理论在中药色谱指纹图谱模式识别中的应用研究   总被引:2,自引:0,他引:2  
魏航  林励  张元  王莲婧  陈沁群 《色谱》2013,31(2):127-132
建立了基于灰色系统理论的中药色谱指纹图谱模式识别模型。运用基于范数与信息熵赋权法的灰色关联分析,求出各待比较图谱特征变量数据序列与理想图谱特征变量数据序列之间的灰色关联度,并依据模糊匹配中的“最大匹配度”原则进行判断,从而达到品种识别和质量评价的目的。该模型在56批次不同品种化橘红药材样品的高效液相色谱分析中取得较满意的结果: 熵权与范数的灰色关联分析均能准确识别出毛橘红与光橘红两个品种,克服了传统相似度或灰色关联在化橘红色谱指纹图谱分析中的误判问题;对药材中化学成分的种类与含量十分接近的毛橘红不同栽培品种的识别率超过92.85%。此外,该模型计算量较少,整个模式识别过程通过计算机编程实现,操作简单。实验结果显示,灰色系统理论在中药色谱指纹图谱模式识别中有良好的适应性。  相似文献   

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