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1.
目的 测定牵牛子脂肪油中的棕榈酸、硬脂酸、油酸、亚油酸和亚麻酸.方法 采用毛细管气相色谱法,对被测成分甲酯化后测定.色谱柱为DB-Wax毛细管柱(30 m×0.25 mm,0.25 μm);检测器为FID;程序升温,起始温度170℃,以10℃/min升至230℃后,保持5 min;分流比15∶1.结果 棕榈酸、硬脂酸、油酸、亚油酸和亚麻酸质量浓度分别在0.04~0.57 mg/mL(r=0.999 6),0.01~0.18 mg/mL(r=0.999 6),0.02~0.35 mg/mL(r=0.999 8),0.05~0.82 mg/mL(r=0.999 7),0.004 ~0.06 mg/mL(r =0.9994)范围内,与峰面积呈良好的线性关系;平均回收率(n=9)分别为98.5%,96.4%,97.2%,98.2%,95.7%.结论 本法简便、准确,重复性好,可用于牵牛子脂肪油的质量控制.  相似文献   

2.
鸦胆子油微囊中油酸与亚油酸含量的气相色谱法测定   总被引:1,自引:0,他引:1  
目的 建立气相色谱法测定鸦胆子油微囊中油酸、亚油酸含量的方法.方法 采用气相色谱法,色谱柱为中等极性的OV-17(苯基甲基硅酮)(30 m×0.32 mm×0.50 μm)毛细管柱,采用恒温检测,柱温220℃,进样器温度230℃,氢火焰检测器温度240℃.结果 油酸甲酯在5.94~380 μg/ml浓度范围内,呈良好线性关系,线性方程为:Y=0.990 4X-0.501 2,相关系数R<'2>=0.999 9;亚油酸甲酯在5.37~340 μg/ml范围内,线性方程为:Y=0.837 5X-0.548 5,相关系数R=0.999 9.油酸甲酯和亚油酸甲酯的平均回收率分别为97.8%(RSD=1.5%)和98.0%(RSD=1.8%).结论 该方法可用于鸦胆子油微囊中油酸、亚油酸的含量测定.  相似文献   

3.
目的:建立炮制辅料羊脂油中油酸的含量测定方法.方法:采用GC法测定,色谱柱为HP-5弹性石英毛细管柱(0.25 μm×0.25 mm×30 m),进样口温度230℃,FID检测器,检测器温度230℃,柱温初始温度100℃,保持5 min,以8℃·min-1升至180℃,然后以2℃·min-1升至230℃;载气为高纯氮气(99.99%),流速1.0 mL· min-1,分流比20∶1.供试品溶液制备方法为取羊脂油0.4g,加入0.5 mol·L-1的KOH-甲醇溶液15 mL,于60℃水浴30 min,冷却后,加入14% BF3-乙醚溶液10 mL,于60℃水浴5 min,放置,待其冷却至室温,加入正己烷10 mL和饱和NaC1水溶液10 mL,静置,待其分离,取上清液,以16-烷为内标物,进行测定比较.结果:油酸甲酯在2.02~10.12 μg线性关系良好(r=0.999 8);本品按干燥品计算,暂定含油酸不得少于6.0%.结论:该方法操作简便,可重复性强,可用于该辅料的质量标准控制.  相似文献   

4.
目的建立GC内标法同时测定青刺果油中油酸、亚油酸、棕榈酸和硬脂酸的含有量。方法采用超临界CO_2流体萃取青刺果油,以苯甲酸苯酯为内标物,选择CP-WAX 52CB毛细管柱(30 m×0.32 mm,0.50μm)分离;进样口温度260℃;检测器(FID)温度300℃;柱温205℃,保持15 min;进样量1μL;分流比为30∶1;载气为高纯氮气;体积流量1.0 mL/min。结果棕榈酸、硬脂酸、油酸和亚油酸分别在0.110~1.104 mg/mL(r=0.999 8)、0.078~0.777 mg/mL(r=0.999 5)、0.232~2.315 mg/mL(r=0.999 8)、0.238~2.376 mg/mL(r=0.999 9)范围内线性关系良好;平均加样回收率分别为97.0%(RSD=0.8%)、99.9%(RSD=1.2%)、99.3%(RSD=1.0%)、99.9%(RSD=0.9%)。结论该方法简便快捷,准确灵敏,可为青刺果油的质量控制提供参考。  相似文献   

5.
目的:建立斑蝥多脂肪酸成分毛细管气相色谱法(GC)含量测定方法。方法:采用石油醚索氏提取斑蝥脂肪油并甲酯化后,以棕榈酸、棕榈油酸、硬脂酸、油酸、亚油酸、亚麻酸、花生酸为指标性成分,通过GC同时测定斑蝥7种脂肪酸成分的含量。结果:7种脂肪酸含量存在一定产地差异性。结论:多脂肪酸成分的GC含量测定方法准确、可靠,为建立斑蝥多指标含量测定方法提供依据。  相似文献   

6.
目的:建立HPLC同时测定通宣理肺胶囊中柚皮苷、橙皮苷、黄芩苷的含量。方法:色谱柱Agilent ZORBAX SB-C18(4.6 mm×250 mm,5μm);流动相乙腈-0.1%磷酸溶液(21∶79),检测波长280 nm,流速1.0 mL.min-1,柱温30℃。结果:柚皮苷进样量在0.156~1.408μg线性关系良好(r=0.999 8,n=5),平均回收率99.56%,RSD 0.88%(n=9);橙皮苷进样量在0.145~1.301μg线性关系良好(r=0.999 7,n=5),平均回收率99.83%,RSD 0.66%(n=9)。黄芩苷进样量在0.359~3.233μg线性关系良好(r=0.999 9,n=5),平均回收率为98.94%,RSD 1.55%(n=9);结论:该方法操作简便,准确可靠,可作为通宣理肺胶囊的质量控制。  相似文献   

7.
目的:建立GC-MS同时测定波棱瓜子脂肪油中4种脂肪酸棕榈酸、亚油酸、油酸和硬脂酸含量的方法。方法:采用HP-5MS毛细管色谱柱(0.25μm×0.25mm×30m),MS检测器,程序升温,初温180℃,保持5min,以2℃/min升至200℃,然后以15℃/min升至260℃,保持24min。进样口温度280℃,分流比20∶1,流速1mL/min,载气为高纯度氦气,进样量1μL。结果:4种脂肪酸线性范围分别为30.45~174.00μg/mL、10.01~57.20μg/mL、216.44~1236.80μg/mL、25.76~147.20(相关系数均为0.9999);平均回收率(n=6)分别为98.50%、98.82%、99.16%和97.57%,RSD分别为1.1%、1.8%、1.1%和1.4%。4种脂肪酸含量测定结果(n=3)分别为0.76~3.88mg/g、0.20~1.06mg/g、1.49~24.33mg/g、0.54~3.22mg/g。结论:该含量测定方法准确、专属,重复性好,适用于波棱瓜子脂肪酸的含量测定。  相似文献   

8.
目的:建立采用高效液相-蒸发光散射检测(HPLC-ELSD)法同时测定柴胡消瘿颗粒中柴胡皂苷a、柴胡皂苷d、芍药苷、阿魏酸、橙皮苷的含量测定方法。方法:色谱柱为Agilent TC-C18(250 mm×4.6 mm,5μm);流动相为乙腈-0.01%甲酸水溶液,梯度洗脱;流速为1.0 m L·min-1;柱温为25℃;蒸发光散射检测器参数:漂移管温度为60℃,雾化气体为高纯氮气,氮气压力为3.0 MPa,Gain 6。结果:5种活性成分实现良好分离,柴胡皂苷a在0.21~1.64μg线性关系良好,r=0.999 3,平均回收率为102.2%,RSD为1.5%;柴胡皂苷d在0.355~2.840μg线性关系良好,r=0.999 0,平均回收率为101.9%,RSD为1.5%;芍药苷在1.20~9.60μg线性关系良好,r=0.999 5,平均回收率为97.93%,RSD为2.2%;阿魏酸在0.140~1.120μg线性关系良好,r=0.999 2,平均回收率为98.79%,RSD为2.7%;橙皮苷在1.00~8.00μg线性关系良好,r=0.999 2,平均回收率为99.9%,RSD为2.6%。结论:该方法简便、准确,重复性好,可为控制柴胡消瘿颗粒的质量提供参考。  相似文献   

9.
目的建立风热感冒片中连翘苷及牛蒡子苷的含量测定方法。方法采用HPLC法,测定风热感冒片中连翘中连翘苷和牛蒡子中牛蒡子苷的含量。结果连翘苷在0.207~2.072μg范围内线性关系良好(r=0.999 8),平均回收率99.87%,RSD=1.43%(n=9)。牛蒡子苷在0.186~4.26μg范围内线性关系良好(r=0.999 7),平均回收率99.30%,RSD=1.08%(n=9)。结论该法专属性强,重现性好,可作为风寒感冒片中连翘苷和牛蒡子苷的含量测定方法。  相似文献   

10.
炒牛蒡子质量标准研究   总被引:1,自引:0,他引:1  
目的:炒牛蒡子的质量标准研究。方法:对炒牛蒡子的显微鉴别、TCL鉴别、水分、灰分、酸不溶性灰分、牛蒡苷含量等进行系统的质量标准制定。结果:采用HPLC法对牛蒡苷进行含量测定,流动相:甲醇-水(1∶1.1);流速:1.0 mL/min;检测波长:280 nm;柱温:25℃。牛蒡苷线性方程为Y=261.92X-368.44,r=0.999 3,牛蒡苷在2.06μg~7.21μg范围内呈良好的线性关系。结论:炒牛蒡子建立显微鉴别与TCL鉴别项,水分不得过7.0%,总灰分不得过7.0%,酸不溶性灰分不得过2.0%,以干品计牛蒡苷含量不低于5.0%。这些数据为炒牛蒡子的质量标准制定提供参考。  相似文献   

11.

Aim of the study

To investigate the activities of the 217 plant extracts in traditional medicine of the Brazilian Cerrado against protozoans and yeasts.

Materials and methods

Plant extracts were prepared by the method of maceration using solvents of different polarities. The growth inhibition of chloroquine-resistant Plasmodium falciparum strain (FcB1) was determined by measuring the radioactivity of the tritiated hypoxanthine incorporated. Activity against Leishmania (Leishmania) chagasi and Trypanosoma cruzi was measured by the MTT colorimetric assay. The antifungal tests were carried out by using the CLSI method. The active extracts were tested also by cytotoxicity assay using NIH-3T3 cells of mammalian fibroblasts.

Results

Two hundred and seventeen extracts of plants were tested against Plasmodium falciparum. The eleven active extracts, belonging to eight plant species were evaluated against L. (L.) chagasi, Trypanosoma cruzi, yeasts and in NIH-3T3 cells. The results found in these biological models are consistent with the ethnopharmacological data of these plants. The ethyl acetate extract of Diospyros hispida root showed IC50 values of 1 μg/mL against Plasmodium falciparum. This extract demonstrated no toxicity against mammalian cells, resulting in a significant selectivity index (SI) of 435.8. The dichloromethane extract of Calophyllum brasiliense root wood was active against Cryptococcus gattii LMGO 01 with MIC of 1.95 μg/mL; and Candida albicans ATCC 10231 and Candida krusei LMGO 174, both with MIC of 7.81 μg/mL. The same extract was also active against Plasmodium falciparum and L. (L.) chagasi with IC50 of 6.7 and 27.6 μg/mL respectively. The ethyl acetate extract of Spiranthera odoratissima leaves was active against Cryptococcus gattii LMGO 01 with MIC of 31.25 μg/mL, and against Plasmodium falciparum with IC50 of 9.2 μg/mL and Trypanosoma cruzi with IC50 of 56.3 μg/mL.

Conclusion

The active extracts for protozoans and human pathogenic yeasts are considered promising to continue the search for the identification and development of leading compounds.  相似文献   

12.

Ethnopharmacological relevance

Mucuna pruriens is a tropical legume anecdotally reputed to have anthelmintic properties. This study was conducted to examine the validity of such claims.

Aim of the study

The aim of this study was to determine if ingestion of Mucuna seeds reduces helminth parasite infestation in lambs.

Materials and methods

Thirty-six Dorper × Katahdin ram lambs were assigned to three treatments, a cottonseed meal based control diet, a diet in which Mucuna replaced cottonseed meal and the control diet with levamisole (7.5 mg/kg body weight) administration. All diets were isonitrogenous and isocaloric. The 12 lambs in each treatment were assigned randomly to 4 pens, each containing 3 lambs. Lambs were trickle infected three times per week by gavage with infectious Haemonchus contortus larvae (2000 larvae/lamb) for 3 weeks.

Results

Levamisole treatment decreased fecal egg counts by 87% and abomasal worm counts by 83%. Mucuna intake did not statistically affect fecal egg counts or abomasal worm counts, though numerical (P > 0.10) reductions of 7.4% and 18.1%, respectively were evident. Anemia indicators, feed intake, and lamb growth were unaffected by treatment.

Conclusions

Levamisole reduced the Haemonchus parasite burden in lambs significantly but feeding Mucuna reduced the burden by levels unlikely to eliminate the clinical effects of parasitism.  相似文献   

13.

Ethnopharmacological relevance

Antidesma bunius Spreng. (Phyllantaceae), Averrhoa bilimbi L. (Oxalidaceae), Biophytum sensitivum (L.) DC. (Oxalidaceae), Ceriops tagal (Perr.) C.B. Rob. (Rhizophoraceae), Kyllinga monocephala Rottb. (Cyperaceae), and Rhizophora mucronata Lam. (Rhizophoraceae) are used as remedies to control diabetes. In the present study, these plants were screened for their potential α-glucosidase inhibitory activity.

Materials and methods

The 80% aqueous ethanolic extracts were screened for their α-glucosidase enzyme inhibitory activity using yeast alpha glucosidase enzyme.

Results

Except for A. bilimbi with IC50 at 519.86±3.07, all manifested a significant enzyme inhibitory activity. R. mucronata manifested the highest activity with IC50 at 0.08±1.82 μg mL−1, followed by C. tagal with IC50 at 0.85±1.46 μg mL−1 and B. sensitivum with IC50 at 2.24±1.58 μg mL−1.

Conclusion

This is the first report on the α-glucosidase inhibitory effect of the six Philippine plants; thus, partly defining the mechanism on why these medicinal plants possess antidiabetic properties.  相似文献   

14.

Ethnopharmacological relevance

An investigation of topical anti-inflammatory activity was undertaken on plants used in Central America traditional medicine.

Aim of study

Four herbal drugs used in the folk medicine of Central America to treat inflammatory skin affections (Acacia cornigera bark, Byrsonima crassifolia bark, Sphagneticola trilobata leaves and Sweetia panamensis bark) were evaluated for their topical anti-inflammatory activity.

Materials and methods

Petroleum ether, chloroform and methanol extracts were obtained for herbal medicines and then extracts were tested on Croton oil-induced ear dermatitis model in mice.

Results

Almost all the extracts reduced the Croton oil-induced ear dermatitis in mice and the chloroform ones showed the highest activity, with ID50 (dose giving 50% oedema inhibition) values ranging from 112 μg/cm2 (Byrsonima crassifolia) to 183 μg/cm2 (Sphagneticola trilobata). As reference, ID50 of the non-steroidal anti-inflammatory drug indomethacin was 93 μg/cm2.

Conclusions

Lipophilic extracts from these species can be regarded as potential sources of anti-inflammatory principles.  相似文献   

15.
中国石斛属植物文献计量研究   总被引:5,自引:2,他引:3  
石斛是珍稀濒危中药材,目前正处于快速发展阶段。为全面了解我国石斛属植物研究的历史和发展现状,作者以1954~2010年"中国知网中国学术期刊网络出版总库"收录的石斛研究文献为依据,采用文献计量学的原理和方法,对我国石斛属植物研究文献从文献年代分布、期刊分布与被引频率、主题分布、研究对象分布、作者与研究机构分布等方面进行了统计与分析。结果表明,我国石斛研究明显分为起步(2个)、停滞、平稳发展、快速上升5个阶段;期刊分布存在离散性与集中性并存的现象,已形成核心期刊研究群,并以《中国中药杂志》、《中草药》和《陕西中医》为代表;研究主题广泛涉及临床与药理、组织培养与种苗繁育、成分分析等多个领域,已经形成比较稳定的研究机构和团队,但研究对象差异显著,以铁皮石斛、金钗石斛和霍山石斛最为集中。我国石斛属植物的研究已取得显著成果,但种植产业发展缓慢,供需矛盾突出,预计种苗繁育与人工种植、产品开发、化学与药理等方面是未来的研究热点,其文献报道仍将进一步上升。  相似文献   

16.
目的:对“蒂达”各品种不同基原植物药用合理性及其资源利用价值作出评价.方法:采用HPLC指纹图谱共有特征峰、结合SPSS聚类分析方法,评价“蒂达”不同品种基原植物的成分组成相似性.结果:“蒂达”不同品种涉及的来源有龙胆科獐牙菜属、花锚属、扁蕾属及肋柱花属共15种1变种33个样品,指纹图谱全谱相似度较差;以10个共有峰成分的相对面积聚类,其基原植物可分别聚为4个组;上述4个属的属间成分组成差异较大;其中獐牙菜属不同种间成分组成变化较大,而其他各属种间成分组成相似度较高.结论:上述龙胆科4属植物均含有具有保肝利胆生物活性的环烯醚萜类、(山)酮类及三萜类成分,藏医学将其归为“蒂达”一类药材使用具有一定的物质基础;鉴于“蒂达”类药材不同基原各品种间在成分组成上差异较大,分别制定各品种的HPLC指纹图谱,是鉴别和控制各品种质量的有效手段,可有效控制各基原品种质量.  相似文献   

17.
厚朴与凹叶厚朴群体遗传学研究   总被引:3,自引:0,他引:3  
目的:对厚朴与凹叶厚朴的群体遗传学进行研究,为中药厚朴的质量控制提供分子生药学方面的依据。方法:对厚朴与凹叶厚朴15个居群应用2个叶绿体基因间序列psbA-trnH和trnL-trnF进行PCR扩增并测序,计算厚朴与凹叶厚朴单倍型频率,用程序HaploNst分析遗传多样性和遗传结构,应用TCS version 1.13软件构建单倍型网状进化树。结果:厚朴与凹叶厚朴均无特有单倍型存在,但单倍型频率存在显著差异,已开始出现遗传分化的趋势,NST略大于GST。结论:厚朴与凹叶厚朴在遗传上已出现遗传分化的趋势,但尚未完全分化成彼此独立的单系。  相似文献   

18.
目的:通过球孢虫草、蛹虫草EST设计EST-SSR引物,建立虫草属EST-SSR标记系统.方法:从NCBI公共数据库下载获得虫草EST,利用Sequece Seiners 1.2软件去除冗余序列并设计引物,进行PAGE电泳.结果:通过去除EST总序列中低质量的和冗余的序列后,得到全长为2 953 173 bp的4 556条无冗余球孢虫草EST.从中发掘出718个EST-SSR,分布于616条EST中,出现频率是15.8%.平均分布频率是每4 096 bp出现1个,三核苷酸重复序列有419个,是出现最多的重复类型.蛹虫草EST去冗余后得到1 363条无冗余EST,共含有1 117个EST-SSR,出现频率为81.95%,出现最多的重复类型是A核苷酸重复.根据球孢虫草EST-SSR序列,设计合成50对引物,有扩增产物的引物为34对,占总设计引物数的68%.根据蛹虫草EST-SSR,设计合成40对引物,有扩增产物的引物为39对,占总设计引物数的97.5%.基于SSR标记进行聚类分析,7种虫草无性型均能分开,且分为4支.结论:虫草属EST-SSR出现频率较高、类型较丰富、多态性潜能较高,具有较高的利用价值.球孢虫草和蛹虫草EST开发的SSR标记在虫草属有较好的转移性与通用性,可以很好的应用于虫草种间遗传关系的研究.应用虫草物种EST建立分子标记是一条简便而又有效的途径.  相似文献   

19.
A survey of medicinal plants used to treat common mycoses was done in the Curituba district, Sergipe State, Brazil. One hundred inhabitants were interviewed by health agents and traditional healers. Four different plants were the most cited (more than 50% of the citations): Ziziphus joazeiro, Caesalpinia pyramidalis, Bumelia sartorum and Hymenea courbaril. The aqueous extracts obtained following traditional methods and using different parts of these plants, were submitted to drop agar diffusion tests for primary antimicrobial screening. Only the water infusion extract of Ziziphus joazeiro and Caesalpinea pyramidalis presented a significant antifungal activity against Trichophyton rubrum, Candida guilliermondii, Candida albicans, Cryptococcus neoformans and Fonsecaea pedrosoi, when compared to the antifungal agent amphotericin B. The minimal inhibitory concentration (MIC) of the bioactive extracts was evaluated by the microdilution method. Best activity with a MIC of 6.5 microg/ml for both extracts was observed against Trichophyton rubrum and Candida guilliermondii. Ziziphus joazeiro and Caesalpinea pyramidalis extracts presented also low acute toxicity in murine models. The present study validates the folk use of these plant extracts and indicates that they can be effective potential candidates for the development of new strategies to treat fungal infections.  相似文献   

20.
目的:对稀莶草药材的3种来源进行鉴定,以了解3种旆莶草的区别.方法:利用中药微性状鉴定法对3种稀莶草进行鉴别.结果:稀莶Siegesbeckia orientalis、腺梗稀莶S.Pubescens和毛梗豨莶S.glabrescens有明显的区别.结论:首次采用中药微性状鉴定法观察拍摄3种豨莶草商品药材的显微图片,真实、直观地反映了3种来源药材的鉴别特征.  相似文献   

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