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1.
目的研究雷公藤红素的抗氧化活性,为其药理活性研究奠定基础。方法运用DPPH法、邻苯三酚自氧化法、芬顿-水杨酸法、ABTS法等4种体外抗氧化活性检测方法,检测雷公藤红素清除自由基的能力。结果雷公藤红素能清除DPPH自由基,超氧阴离子自由基、羟自由基、ABTS阳离子自由基,IC_(50)分别为0.16 mg·ml~(-1)、0.88 mg·ml~(-1)、0.43 mg·ml~(-1)、0.035 mg·ml~(-1),其对ABTS阳离子自由基清除作用最强,对超氧阴离子清除作用最弱。结论雷公藤红素具有体外抗氧化活性,但对上述4种自由基的清除程度不同。  相似文献   

2.
黑果枸杞叶片甲醇提取物清除自由基活性的研究   总被引:4,自引:0,他引:4  
目的 测定黑果枸杞叶片甲醇提取物对DPPH自由基、羟自由基(·OH)和超氧阴离子自由基(O2)的清除能力.方法 采用DPPH法、水杨酸法、邻笨三酚自氧化法分别测定黑果枸杞叶片甲醇提取物清除DPPH自由基、羟自由基和超氧自由基的能力.结果 在实验条件下,黑果枸杞叶片甲醇提取物对超氧阴离子,羟自由基,DPPH自由基均有不同程度的抑制作用,最高清除活性分别迭72.72%,54.90%,92.08%.结论 黑果枸杞叶片甲醇提取物对DPPH·,·OH和O2-自由基均具有较好的清除作用.  相似文献   

3.
宽叶缬草醚酯提取物体外抗氧化活性研究   总被引:1,自引:0,他引:1  
目的 探讨缬草醚酯提取物体外抗氧化活性.方法 采用DPPH法、邻苯三酚自氧化法、水杨酸法,分别测定缬草醚酯提取物清除DPPH自由基、超氧阴离子自由基和羟自由基的能力.结果 样品中活性物质对于DPPH自由基、超氧阴离子自由基、羟自由基等自由基半清除率浓度(IC50)分别为1.36,1.46和2.14 mg/ml.结论 在实验条件下,缬草醚酯提取物对DPPH自由基、羟自由基、超氧阴离子有较好的抑制作用.  相似文献   

4.
目的探讨不同灵芝提取物的美白和抗衰作用,选择适合于化妆品开发的原料。方法以清除羟自由基、清除超氧阴离子、清除DPPH作用以及酪氨酸酶抑制活性为评价指标,研究灵芝水提取物和醇提物的抗衰和美白活性。结果 6种灵芝的醇提物和水提物对DPPH都具有很强的清除作用,其中ZLd水提物作用最强,IC50为0.03 g·L-1。仅ZLd水提物和醇提物同时具有清除超氧阴离子的作用。ZLb、ZLc及ZLd的提取物同时具有清除羟自由基的作用,其中ZLd的水提物对羟自由基清除作用最好,IC50值为7.14 g·L-1。6种灵芝的醇提物具有很强的酪氨酸酶抑制活性,其中ZLd作用最强。而6种灵芝水提物的酪氨酸酶抑制活性较醇提物弱,在10 g·L-1浓度时ZLd具有较高的活性,抑制率为66.77%。结论 ZLd适合成为抗衰及美白化妆品开发的原料。  相似文献   

5.
美洲大蠊提取物中抗衰老活性部位抗氧化活性的初步分析   总被引:1,自引:0,他引:1  
目的 对美洲大蠊抗衰老活性部位进行体外抗氧化活性的初步分析.方法 采用体外化学模拟体系研究了美洲大蠊抗衰老3个活性部位清除DPPH·自由基、羟基自由基和超氧阴离子自由基的能力,以及对3个部位的还原能力进行了测定.结果 美洲大蠊抗衰老活性总提物、抗衰老活性部位Ⅰ、抗衰老活性部位Ⅱ清除DPPH·自由基能力的EC50分别为0.086 25,31.15和4.904 mg·ml-1;总还原力的EC50分别为1.316,38.65和7.598 mg·ml-1;清除羟自由基能力的EC50值分别为0.032 62,5.665和2.913 mg·ml-1;清除超氧阴离子自由基的EC50值分别为4.357,9.255和13.44 mg·ml-1.结论 美洲大蠊抗衰老不同有效部位都有一定的抗氧化作用,各自表现出不同的抗氧化能力,其对自由基的清除机制可能不同.  相似文献   

6.
葛根黄酮的体外抗氧化活性研究   总被引:3,自引:0,他引:3  
目的:探讨葛根黄酮的体外抗氧化活性。方法:采用总抗氧化能力、DPPH·自由基、羟基自由基(·OH)、超氧阴离子(O2·-)的反应体系,考察葛根黄酮的体外抗氧化能力。结果:葛根黄酮在一定浓度范围内,其反应抗氧化作用的FRAP值、清除DPPH·、羟基自由基、超氧阴离子的能力及抑制过氧化脂质产物丙二醛的作用均呈量效关系;在浓度为500μg/ml时,DPPH·的最大清除率为48%,EC50为450.51μg/ml;在浓度为2.95mg/ml时,羟基自由基的最大清除率为21.14%;在浓度为600μg/ml时,超氧阴离子的最大清除率为60.07%,超氧阴离子的EC50值为213.8μg/ml,抑制MDA生成的IC50为11.3μg/ml。结论:葛根黄酮具有较强的体外抗氧化活性,其机制可能与RPI抗氧化活性和消除自由基能力有关。  相似文献   

7.
目的:探讨冠脉康体外抗氧化性。方法:采用DPPH自由基、超氧阴离子、还原能力为评价指标,以维生素C及没食子酸为对照,初步研究冠脉康体外抗氧化活性。结果:冠脉康和维生素C清除DPPH的EC50分别是44.04μg/mL和28.89μg/mL;冠脉康和没食子酸消除超氧阴离子自由基的EC50分别是126.7μg/mL和32.7μmg/mL;结论:冠脉康提取物具有一定的还原力,能清除DPPH和超氧阴离子自由基,冠脉康多方面抗氧化活性可能是其治疗心脑血管病的作用机制之一。  相似文献   

8.
海带褐藻多糖硫酸酯的抗氧化活性研究   总被引:53,自引:0,他引:53  
目的 研究海带褐藻多糖硫酸醋的抗氧化作用。方法 采用体外实验研究海带褐藻多糖硫酸醢对超氧阴离子、羟自由基、DPPH的清除作用以及对H2O2诱导的红细胞氧化溶血和大鼠肝匀浆脂质过氧化的保护作用。结果 海带褐藻多糖硫酸醋对超氧阴离子具有良好的清除作用,IC50为20.3μg/mL,其对羟自由基的清除作用较弱,对有机自由基DPPH的作用很弱。褐藻多糖硫酸醋能够抑制H2O2诱导的红细胞氧化溶血,对FeSO4-抗坏血酸体系造成的脂质过氧化具有良好的保护作用。结论 海带褐藻多糖硫酸醋具有显著的体外抗氧化活性。  相似文献   

9.
枳实提取物的体外抗氧化作用研究   总被引:5,自引:0,他引:5  
焦士蓉  马力  黄承钰  宋薇薇 《中药材》2008,31(1):113-116
目的研究枳实提取物的体外抗氧化作用.方法采用羟自由基、超氧阴离子自由基、DPPH自由基的生成体系,研究枳实提取物及以柚皮苷为对照,对自由基的清除能力和对小鼠肝、肾、心组织匀浆的脂质过氧化抑制作用.结果枳实提取物对羟自由基、超氧阴离子、DPPH自由基的清除分别为IC50=2.71 mg/ml,SC50=5.02 mg/ml,DC50=0.54 mg/ml;柚皮苷分别为IC50=45.94 mg/ml,SC50=10.16 mg/ml,DC50=9.62 mg/ml.枳实提取物对小鼠肝、肾、心组织匀浆的脂质过氧化抑制作用分别为0.58、1.03、0.69 mg/ml;柚皮苷EC50分别为9.87、11.04、10.40 mg/ml.研究表明枳实提取物较柚皮苷具有强的清除自由基及抑制脂质过氧化的能力.结论枳实提取物能有效清除羟自由基、超氧阴离子自由基、DPPH自由基,抑制脂质过氧化作用,具有进一步研究和开发价值.  相似文献   

10.
目的 分离纯化半夏多糖,分析其结构及抗氧化、免疫增强活性。方法 使用水提-醇沉法提取半夏多糖,经阴离子交换色谱柱分离纯化,苯酚-硫酸法测定总糖含量,Lowry法测定蛋白质含量,PMP-柱前衍生HPLC法测定单糖组成及比例,并对纯化多糖进行紫外-可见光谱和红外光谱分析,并测定其对羟自由基、超氧阴离子自由基和DPPH自由基的清除作用及对RAW264.7细胞增殖的影响。结果 半夏多糖纯化得PTC0、PTC01、PTC02和PTC05共4个组分,单糖组成复杂、比例差异大。PTC0对超氧阴离子自由基和DPPH自由基清除作用最强,IC50值分别为999.8、1 011.4μg/mL,PTC01对羟自由基的清除作用最强,IC50值为1 003.3μg/mL。PTC02在400μg/mL时促进RAW264.7细胞的增殖效果最好,细胞活力达161.9%。结论 半夏多糖可作为天然抗氧化剂和免疫调节剂用于药物的开发。  相似文献   

11.
汤卫国  王奇志  印敏  王鸣  陈雨  张建华  冯煦 《中草药》2014,45(15):2172-2177
目的建立微波消解-电感耦合等离子体质谱(ICP-MS)直接稀释测定脉络宁注射液中25种矿物质元素(Mg、Ca、Fe、Cu、Zn、Mn、Al、B、Ba、Co、Cr、K、Li、Mo、Na、Ni、P、Pb、Sr、Th、Ti、V、As、Cd和Hg)的方法。方法分别对微波消解条件和测试条件进行考察;样品经微波消解后,采用电感耦合质谱仪测定25种矿物质元素,并对测定方法学进行考察。结果确定最佳消解条件为3步缓慢升温:400 W 80℃升温10 min,保留5 min;600 W 120℃升温10 min,保留5 min;900 W 200℃升温20 min,保留20 min;25种矿物质元素在各自的线性范围内线性关系良好,r≥0.999 6,精密度、稳定性和重复性试验的RSD均符合定量分析要求;加标回收率为94.7%~106.1%,RSD在0.34%~2.79%。脉络宁注射液中检测出Mg、Ca、Fe、Cu、Zn、Mn、Al、B、Ba、Co、Cr、K、Li、Mo、Na、Ni、P、Pb、Sr、Th、Ti、V,未检出As、Cd和Hg。结论该方法简便、迅速、准确,适用于脉络宁注射液中25种矿物质元素的同时测定。  相似文献   

12.
The disturbance and instability of laterality are obstacles to diagnostics and therapy. Correction prior to starting therapy is required. They also predispose toward defined health problems and unspecific diseases. Numerous research activities provide evidence of the relevance of undisturbed laterality in diagnostics and therapy. Techniques of testing and therapeutic corrections will allow for optimized therapy success.  相似文献   

13.
14.
The Journal of Acupuncture and Tuina Science, a journal with an international scope (IS SN 1672-3597, CN 31-1908/R, Bimonthly), is embodied by 'Springer Verlag' Database, Index Copernicus (IC) and Chinese Scientific and Technical Paper and Citations Data (CSTPCD). You can search full text on http://www, springerlink, com/content/1672 -3597.  相似文献   

15.
正Beverages based on Ilex paraguariensis A.St.-Hil.are used in the south Brazil and other Latin American countries located at the so-called southern cone.It is known as chimarro or mate in south and southeast Brazil,tererêin  相似文献   

16.
This paper deals with an interdisciplinary study covering historic, botanical, phytochemical, pharmacological and clinical aspects of rhubarb and related species, to lay stress on the correlation between plant phylogeny, chemical constituents and purgative activity.

It was found that the official rhubarbs were exclusively restricted in the Sect. Palmata e.g. Rheum palmatum R. palmatum var. tanguticum R. officinale; the following criteria may serve as their standard, viz., the presence of sennoside derivatives and rhein, the occurrence of the reduced form of rhein and aloe-emodin, the leaves with any kind of palmate incision. Comprehensive multivariate analyses showed that there is a very close relationship between the leaf incision, existence of sennosides or rhein and purgative activity.  相似文献   


17.

Background

At present, the state-of-the-art medication in treating idiopathic taste disorder (gustatory dysfunction) is zinc. If zinc medication was unsuccessful, not tolerated or if it is contraindicated the persons affected can hardly be helped.

Objectives

In a randomized placebo-controlled clinical trial an attempt was made to determine the efficacy of acupuncture.

Methods

The treatment group was treated with acupuncture needles, the placebo group with an inactive acupuncture-laser. Endpoints of the study were changes in the taste test, the quality of life and the severity of symptoms of depression (BDI) as well as mood changes (ZMS). Satisfaction with the success of the respective therapy was also evaluated. Data were collected before and after therapy and again for the treatment group 10 weeks after completion of the treatment period.

Findings

Treatment with real acupuncture showed a significant improvement in gustatory function as well as a significant improvement in psychological symptoms. Greater satisfaction with the treatment results was evident in the treatment group. The treatment results of acupuncture remained stable over a period of ten weeks after completion of the treatment.

Conclusion

Acupuncture was effective in the therapy of idiopathic taste disorders and therefore it is an effective alternative when zinc medication is not tolerated or unsuccessful. But it is also suitable as a therapy of first choice. Acupuncture can be considered as an extension of the therapeutic spectrum in the difficult treatment of taste disorders.  相似文献   

18.

Background

Experimental and clinical studies postulate a neurobiological mechanism of acupuncture by modulating central pain systems, neurohormones and -transmitters. It seems to be quite likely that the autonomic nervous system (ANS) plays an important mediating role in this neuromodulation.

Aim

In measuring heart rate variability (HRV), as a non-invasive approach to the ANS-function, the object of this study was to monitor probable acupuncture-induced changes of autonomic balance. The innovative technology of laser-needle acupuncture offers for the first time a stimulation method which fulfils the demands on a placebo-controlled acupuncture trial not requiring controversial sham acupuncture.

Method

19 healthy voluntary subjects underwent 3 treatments in randomized sequence, consisting of placebo-, 1-point- (PC 6) and simultaneous 3-point- (PC 6, LR 3, SI 3) laser-needle-stimulation over 20 minutes. Before, during and after placebo-/verum laser-needle acupuncture, HRV-data for normalized HF(high frequency)- and LF(low frequency)-Power (nHF, nLF) and their quotient nLF/nHF obtained by power spectrum analysis (FFT), were measured and analyzed statistically at 5 different time points (ANOVA repeated measures, p < 0,05).

Results

During both verum applications, the 1-point- (PC 6) as well as the simultaneous 3-point- (PC 6, LR 3, SI 3) laser-needle stimulation, significant changes of the ANS-activity were found in comparison to the placebo application. The most significant modification of HRV was an increase of nHF (p < 0,05 (PC 6), p < 0,0001 (PC 6, LR 3, SI 3)) as an expression of growing vagal activity during acupuncture.

Conclusion

Laser-needle acupuncture causes in 1-point-stimulation (PC 6) as well as in simultaneous 3-point-stimulation (PC 6, LR 3, SI 3) significant changes in HRV in comparison to placebo application. HRV-monitoring seems to be a suitable approach in exploration of acupuncture-induced changes of ANS and could possibly be established in combination with laser needle acupuncture as a standard for further scientific and clinical acupuncture investigations which are greatly needed.  相似文献   

19.
瑞香科植物广泛分布于世界热带和温带地区,其中多种植物可供药用。在对该科植物的研究中发现,黄酮类、木脂素和香豆素等酚性化合物的低聚体为其重要的特征性成分,药理活性主要表现在抗肿瘤、抗炎、抗氧化、抗菌和抗病毒等方面。对已发现的酚性聚合体的化学结构、植物来源及药理活性进行综述,为瑞香科植物今后的研究和开发利用提供参考。  相似文献   

20.
目的采用HPLC梯度洗脱法同时测定沉香化滞丸中沉香四醇、柚皮苷、橙皮苷、新橙皮苷、和厚朴酚、大黄素、厚朴酚、木香烃内酯、去氢木香内酯、大黄酚、大黄素甲醚11种成分。方法采用Thermo Syncronis C18色谱柱(250 mm×4.6 mm,5μm),流动相为水-乙腈,梯度洗脱:0~10 min,20%乙腈;10~20 min,20%~40%乙腈;20~24 min,40%乙腈;24~26 min,40%~52%乙腈;26~30 min,52%乙腈;30~31 min,52%~90%乙腈;31~35 min,90%乙腈;35~40 min,90%~100%乙腈;40~43min,100%乙腈;43~45min,100%~20%乙腈;检测波长215nm,体积流量1.0m L/min,柱温30℃,进样量20μL。结果各成分在43 min内分离良好,沉香四醇、柚皮苷、橙皮苷、新橙皮苷、和厚朴酚、大黄素、厚朴酚、木香烃内酯、去氢木香内酯、大黄酚、大黄素甲醚的线性范围分别为1.4~13.6、10.0~200.0、31.5~315.0、1.0~120.1、1.8~50.6、0.93~10.1、1.8~30.0、0.2~40.3、1.8~18.1、1.7~25.0、0.45~10.70μg/mL;样品中各成分的平均回收率均在98.90%~100.87%;11种成分精密度RSD在0.55%~1.54%;供试品溶液在30 h内稳定性良好,RSD在0.75%~1.94%;重复性RSD在0.39%~1.73%。6批次样品中沉香四醇、柚皮苷、橙皮苷、新橙皮苷、和厚朴酚、大黄素、厚朴酚、木香烃内酯、去氢木香内酯、大黄酚、大黄素甲醚质量分数分别为92.0~201.0、511.5~9 033.0、5 475.0~12 635.5、54.5~5 095.5、192.0~2 137.5、117.0~391.5、106.5~1 281.5、13.0~136.5、93.5~199.0、177.0~1 207.0、33.5~251.5μg/g。结论本方法准确、快速、简便,重复性好,精密度高,适用于沉香化滞丸中多种活性成分的定量分析。  相似文献   

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