共查询到18条相似文献,搜索用时 171 毫秒
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建立了人参柔顺洗发水中人参皂苷Rg1,Re和Rb1的鉴别和含量测定方法.采用薄层色谱(TLC)法,以氯仿-甲醇-水(体积比2∶1∶0.1)为展开溶剂,对人参皂苷进行鉴别;通过高效液相色谱(HPLC)法,以乙腈-水为流动相梯度洗脱,测定洗发水中人参皂苷的含量.结果显示TLC法能同时鉴别人参皂苷Rg1,Re和Rb1;HPLC法中人参皂苷Rg1,Re和Rb1的线性回归方程分别为Rg1∶y=246 683x -7 070.6,r=0.999 9;Re∶y=388 224x - 11 320,r=0.999 9;Rb1∶y=216 383x+3 644.9,r=0.999 9;平均回收率分别为99.69%,97.39%和98.05%,RSD值分别为1.62%,1.75%和0.68%. 相似文献
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《当代化工》2020,(7)
采用高效液相法测定参苓白术散中人参皂苷和甘草黄酮的含量,为下一步探究参苓白术散的体外抗氧化活性研究做准备。方法:采用HPLC法(反相高效液相法),目的:为测定参苓白术散中的甘草黄酮、人参皂苷含量,进行线性范围的考察和实验方法学研究,同时测定参苓白术散中人参皂苷对羟自由基的抑制情况。结果:人参皂苷Rg1、槲皮素、人参皂苷Re、芦丁分别在0.625~5.000μg、0.250~1.000μg、0.375~3.000μg、0.250~1.000μg内对羟自由基的抑制作用显著;芦丁的平均质量分数为0.295 5 mg·g~(-1);人参皂苷Rg1的平均质量分数为0.193 mg·g~(-1);槲皮素的平均质量分数为0.243 9 mg·g~(-1);人参皂苷Re的平均质量分数为0.074 7 mg·g~(-1)。参苓白术散的抗氧化能力经验证也较为明显,人参皂苷对羟自由基的抑制率为79%。 相似文献
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目的:采用HPLC法同步测定三七粉中人参皂苷Rg1、Rb1及三七皂苷R1含量。方法:采用SGE protecol C18(5μm,4.6×250mm)色谱柱,流动相为乙腈—水梯度洗脱(0~12min,19∶81;12~60min,19~36∶81~64),检测波长为203nm,流速1.0mL/min,进样量20μL。结果:人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1分别在25.625~430mg/L、26.875~410mg/L、10.625~170mg/L范围呈线性,相关系数r分别为0.9999、0.9998、0.9996;该方法重复性及回收率均符合要求。结论:本法用于同步测定三七粉中人参皂苷Rg1、Rb1及三七皂苷R1的含量,具有简便、准确、高效等特点。 相似文献
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人参皂苷Rb1是人参中的主要皂苷之一,但人体吸收量极少,而其衍生物Rg3、Rk1、Rg5却易于人体吸收,但其制备和分离成本较高。针对以上问题将人参皂苷Rb1在50%乙醇水溶液体系和无水乙醇体系中进行催化条件的优化,并分析其产物。实验发现,通过对金属离子催化效果的筛选,选取NbCl5为反应催化剂;在50%乙醇水溶液体系中最优条件下反应,Rg3得率为18.29%;在无水乙醇体系中最优条件下反应,Rg3得率为49.45%。根据两组反应产物的对比,推测在50%乙醇水溶液体系反应时,水可能供给电子基团,并生成更多水合化合物即20(S)-25-OH-Rg3和20(R)-25-OH-Rg3;在无水乙醇体系反应时,电子基团可能无法供给,形成双键,生成其他化合物即Rk1和Rg5。该发现为金属离子催化人参皂苷以制备稀有人参皂苷的方法奠定了理论基础。 相似文献
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建立了高效液相色谱法同时测定三七提取物中三七皂苷R1与人参皂苷Rg1、Rb1含量的方法。采用高效液相色谱仪,Agilent ODS-C18(5μm,4.6mm×250mm)液相色谱柱,流动相为乙腈-水梯度洗脱,流速为1.0 mL/mim,检测波长为203 nm,柱温为35℃。结果表明,三七皂苷R1在度15.29~244.60 mg/L的范围内(r=0.9998),人参皂苷Rg1在14.30~228.90 mg/L范围内(r=1.0000),人参皂苷Rb1在13.13~210.11 mg/L范围内(r=1.0000),线性关系良好。三七皂苷R1和人参皂苷Rg1、人参皂苷Rb1平均加标回收率分别为99.54%、101.61%、102.99%,峰面积相对标准偏差RSD(n=6)分别为1.67%、0.93%、0.92%。该方法简便、准确,重现性好,可以对三七提取物中三七皂苷R1与人参皂苷Rg1、Rb1进行定量分析。 相似文献
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Cardiovascular disease (CVD) is one of the main causes of mortality worldwide, and dyslipidemia is a major risk factor for CVD. Ginseng has been widely used in the clinic to treat CVD. Ginsenoside Rg3, one of the major active components of ginseng, has been reported to exhibit antiobesity, antidiabetic, and cardioprotective effects. However, the effect of ginsenoside Rg3 on hepatic lipid metabolism remains unclear. Therefore, we investigated whether ginsenoside Rg3 would regulate hepatic lipid metabolism with AMP-activated protein kinase (AMPK) activation in HepG2 cells. Ginsenoside Rg3 significantly reduced hepatic cholesterol and triglyceride levels. Furthermore, ginsenoside Rg3 inhibited expression of sterol regulatory element binding protein-2 (SREBP-2) and 3-hydroxy-3-methyl glutaryl coenzyme A reductase (HMGCR). Ginsenoside Rg3 increased activity of AMPK, a major regulator of energy metabolism. These results suggest that ginsenoside Rg3 reduces hepatic lipid accumulation with inhibition of SREBP-2 and HMGCR expression and stimulation of AMPK activity in HepG2 cells. Therefore, ginsenoside Rg3 may be beneficial as a food ingredient to lower the risk of CVD by regulating dyslipidemia. 相似文献
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Go Oun Kim Nayeon Kim Gyu Yong Song Jong-Sup Bae 《International journal of molecular sciences》2022,23(18)
Sepsis is an uncontrolled response to inflammatory infection and is associated with high levels of mortality and morbidity. Rg4 is a rare ginsenoside mainly found in the leaves of Panax ginseng C. A. Meyer and the major protopanaxatriol-type ginsenoside of black ginseng. In this study, we determined whether Rg4 affects cecal ligation and puncture (CLP)-induced sepsis. Animals were separated into the following six groups: control group, CLP-operated group, CLP plus maslinic acid (MA), and CLP plus Rg4 (5, 10, or 15 mg/kg). Survival rate, body weight changes, inflammatory cytokines, and histological analyses were assessed. Human endothelial cells were activated with the high-mobility group box 1 (HMGB1) protein and Rg4. Cell viability was determined using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Enzyme-linked immunosorbent assay (ELISA) and Western blot analysis were used to assess inflammation and gene expression, respectively. After CLP surgery, the Rg4-administered group exhibited a higher survival rate and body weight compared with the untreated control group. Rg4 treatment reduced cytokine levels, including tumor necrosis factor (TNF)-α and interleukin (IL)-1β, as well as nitric oxide (NO) levels and renal inflammation. After Rg4 treatment of HMGB1-activated cells, the expressions of toll-like receptor (TLR) 4 and TNF-α were decreased, and the activation of phosphoinositide 3-kinase (PI3K)/AKT signaling increased cell viability. In summary, Rg4 inhibited inflammation and exhibited a protective effect against CLP-induced sepsis, thereby reinforcing cell survival against septic responses. 相似文献
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优选生姜6-姜辣素的提取方法,研究生姜提取液在去屑洗发水中的应用。采用HPLC法,以6-姜辣素为考察指标,分别对榨汁法、加热回流提取法、微波提取法、超声提取法和超声-微波协同萃取法的生姜提取液进行含量测定;通过抑菌实验,考察不同添加量的生姜提取液对洗发香波性能影响,确定生姜提取液的最佳添加量,最小抑菌浓度。结果显示,榨汁法为生姜的最佳提取方法,姜汁的最佳添加量是15%,最小抑菌浓度是:糠秕马拉色菌MIC为18.75 mg/mL,金黄色葡萄球菌、大肠埃希菌和白色念珠菌MIC均为9.375 mg/mL。 相似文献
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研究提出一种快速测定中药渗漉提取液中有效组分的近红外(NIR)光谱分析方法,可用于中药渗漉提取过程在线分析.以中药三七为对象,采用人参皂苷Rg1、Rb1、Rd的HPLC测定值及三七总皂苷(PNS)的比色法测定值作对照值,建立了NIR光谱与对照值之间的校正模型.比较研究了径向基函数神经网络(RBFNN)和偏最小二乘回归(PLSR)两种建模方法,其中RBFNN校正模型对Rg1、Rb1、Rd和PNS 4种组分的交叉验证均方差(RMSECV)分别为1.120、1.230、0.267、4.749,预测均方差(RMSEP)分别为0.677、0.969、0.155、8.065.研究结果表明,本文方法方便、准确、无损,可推广用于中药提取过程分析及质量控制. 相似文献
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Yu SH Huang HY Korivi M Hsu MF Huang CY Hou CW Chen CY Kao CL Lee RP Lee SD Kuo CH 《Journal of the International Society of Sports Nutrition》2012,9(1):23-7
ABSTRACT: BACKGROUND: Previous studies reported divergent results on nutraceutical actions and free radical scavenging capability of ginseng extracts. Variations in ginsenoside profile of ginseng due to different soil and cultivating season may contribute to the inconsistency. To circumvent this drawback, we assessed the effect of major ginsenoside-Rg1 (Rg1) on skeletal muscle antioxidant defense system against exhaustive exercise-induced oxidative stress. METHODS: Forty weight-matched rats were evenly divided into control (N = 20) and Rg1 (N = 20) groups. Rg1 was orally administered at the dose of 0.1 mg/kg bodyweight per day for 10- week. After this long-term Rg1 administration, ten rats from each group performed an exhaustive swimming, and remaining rats considered as non-exercise control. Tibialis anterior (TA) muscles were surgically collected immediately after exercise along with nonexercise rats. RESULTS: Exhaustive exercise significantly (p <0.05) increased the lipid peroxidation of control group, evidenced by elevated malondialdehyde (MDA) levels. The increased oxidative stress after exercise was also confirmed by decreased reduced glutathione to oxidized glutathione ratio (GSH/GSSG ratio) in control rats. However, these changes were completely eliminated in Rg1 group. Catalase (CAT) and glutathione peroxidase (GPx) activities were significantly (p <0.05) increased by Rg1 in non-exercise rats, while no significant change after exercise. Nevertheless, glutathione reductase (GR) and glutathione S-transferase (GST) activities were significantly increased after exercise in Rg1 group. CONCLUSIONS: This study provide compelling evidences that Rg1 supplementation can strengthen antioxidant defense system in skeletal muscle and completely attenuate the membrane lipid peroxidation induced by exhaustive exercise. Our findings suggest that Rg1 can use as a nutraceutical supplement to buffer the exhaustive exercise-induced oxidative stress. 相似文献
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Kyunglae Cho Hye Jin Woo Keun Hyoung Park Hee Jeong Chae 《Korean Journal of Chemical Engineering》2011,28(1):209-215
The extraction and enzymatic treatment conditions of ginseng leaves, stems and roots for the production of fermented ginseng were optimized in order to enhance the extraction of oligosaccharide, which is a Lactobacillus growth-activating factor. Additionally, the effects of enzymatic hydrolysis on Lactobacillus fermentation characteristics and metabolites of ginsenoside were investigated. The ginseng leaves were found to be more suitable for the raw material of fermented ginseng products because ginseng leaves have higher carbohydrate and crude saponin content than ginseng roots. The optimized conditions were found as particle size of ginseng raw material below 0.15 mm, pH 5.0–5.5, reaction temperature of 55–60 °C, Ceremix concentration of 1%, and reaction time of 2 h. It was shown that the polysaccharides of ginseng were hydrolysed to oligosaccharide by the enzymatic hydrolysis of ginseng leaves, stems and roots. The total oligosaccharide content increased by the enzyme treatment up to 2.2-fold, 5.3-fold and 2.3-fold in ginseng leaves, stems and roots, respectively, compared to control (no treatment). It was found that the enzymatic treatment promoted the Lactobacillus growth, resulting in more significant change in total oligosaccharide consumption and total acidity. The content of several metabolites of ginsenoside, such as Compound K, Rg1, Rh1 and Rg3, was selectively increased by combining the enzymatic treatment and Lactobacillus fermentation. Especially, in the case of enzyme treatment using ginseng leaves, Compound K formation was enhanced up to three-fold compared to control (no treatment). Moreover, in case of combined treatment of enzyme and fermentation, Compound K formation was significantly promoted up to ten-fold. 相似文献