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摘要:目的:建立HPLC法测定不同方法炮制的泽泻中泽泻醇A、泽泻醇B、23-乙酰泽泻醇C、23-乙酰泽泻醇B、24-乙酰泽泻醇A、泽泻烯醇、环氧泽泻烯的含量,阐述不同炮制方法对泽泻中7个成分含量的影响。方法:采用HPLC法,色谱柱为Waters XTERRA C18柱(250 mm×4.6 mm, 5μm),流动相为乙腈-0.01%磷酸水溶液,梯度洗脱,流速为1.0 ml·min-1,检测波长为208 nm、246 nm,柱温25℃。结果:泽泻醇A、泽泻醇B、23-乙酰泽泻醇C、23-乙酰泽泻醇B、24-乙酰泽泻醇A、泽泻烯醇、环氧泽泻烯线性范围分别为1.947~11.680μg·ml-1(r=0.999 3)、1.756~10.540μg·ml-1(r=0.999 2)、4.388~26.330μg·ml-1(r=0.999 7)、8.420~50.520μg·ml-1(r=0.999 8)、3.589~21.540μg·ml-1(r=0.999 4)、1.476~8.854μg·ml-1(r=0.999 5)、1.534~9.142μg·ml-1(r=0.999 1);平均加样回收率分别为98.87%,98.72%,98.75%,98.85%,100.17%,99.20%,99.00%,RSD≤1.06%(n=6)。与生品相比,泽泻经炮制后23-乙酰泽泻醇C和23-乙酰泽泻醇B含量均降低,盐泽泻降幅最大;泽泻醇B、泽泻烯醇及环氧泽泻烯含量变化不明显;泽泻醇A、24-乙酰泽泻醇A的含量均增加。结论:该方法操作简单、结果准确、重复性好,可同时测定泽泻不同炮制品中7个化学成分的含量。 相似文献
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黄精始载于《名医别录》.《中国药典》2010年版规定,以百合科植物滇黄精、黄精或多花黄精的干燥根茎入药.黄精作为一种滋补药,具有养阴、补气、补肾润肺等功效.
根据原植物和药材性状的差异,黄精可分为姜形黄精、鸡头黄精和大黄精三种.姜形黄精的原植物为多花黄精,鸡头黄精的原植物为黄精,而大黄精(又名碟形黄精)的原植物为滇黄精.历代文献对黄精的炮制均有记载,最早可见于医方本草及炮制专著之中,有的是传统炮制方法的沿用,也有的是根据当地用药习惯,全国各地炮制方法不够统一.从古至今,黄精的炮制方法可累计达到20多种.黄精,又名老虎姜、鸡头参.为百合科植物滇黄精、黄精或多花黄精的干燥根茎. 相似文献
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高云涛 《中国现代药物应用》2012,6(8):32-33
目的 探讨当归不同炮制方法对挥发油含量的影响.方法 采用土炒法,酒炒法炮制当归,以挥发油含量为指标设计实验.结果 炮制后挥发油含量:生当归挥发油平均含量0.5%;酒当归挥发油平均含量0.55%;土炒当归挥发油平均含量0.4%.结论 炮制对挥发油含量有影响. 相似文献
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当前中药饮片现状仍然堪忧 总被引:1,自引:0,他引:1
我国中药历史悠久,来源广泛,品种繁多,长期以来一直是人们防病治病的有力武器.近年来,中药材市场得到迅速发展,但也出现了不少问题,各地炮制方法不统一,大量饮片炮制品不按规范炮制,甚至有一些紧缺的、贵重的饮片,以假充真,以次充好或擅自在辅料中增加添加剂,使药品失去了防病、治病的真正作用. 相似文献
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曲类中药是一类临床常用的传统中药,然而由于各地区发酵曲类中药所使用的原料和发酵工艺不统一,各地自然菌种差异较大以及发酵过程菌群代谢的复杂性等问题导致曲类中药质量不稳定。因此,曲类中药的炮制工艺、炮制机理和质量控制方法一直是近些年中药炮制研究领域的热点。近年来,随着炮制化学、现代药理学和微生物基因组学等多学科的应用,曲类中药的炮制工艺、炮制机制和质量控制方法取得了一定成就。发酵炮制工艺逐渐从自然发酵转变为纯菌种协同发酵,进一步明确发酵工艺参数;炮制机制研究阐明了部分曲类中药药效物质基础和发酵菌种变化;采用薄层色谱、显微镜、HPLC、电子舌鼻等多技术为质量控制提供了新的方法。本文通过对曲类中药发酵炮制工艺、炮制机制以及质量控制方法的研究进展进行系统总结和分析,为其进一步研究提供参考。 相似文献
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Xue-Yan Hu Yuan-Qiang Guo Tie-Jun Zhang Hai-Xia Chen 《Journal of Asian natural products research》2013,15(5):481-484
Two new triterpenoids, 25-anhydro-alisol F (1) and 11-anhydro-alisol F (2), were isolated from the rhizomes of Alisma orientalis. Their structures were elucidated by spectroscopic methods. 相似文献
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泽泻中二萜成分的结构测定 总被引:3,自引:0,他引:3
目的研究我国常用中药泽泻(Alisma orientalis Juzep.)块茎的乙醇提取物的化学成分。方法将乙醇提取物用硅胶柱色谱进行分离纯化,用IR,NMR,MS及CD等方法解析化学结构。结果共分离出3个ent-kaurane二萜化合物(I~III),其结构分别鉴定为16(R)-ent-kaurane-2,12-dione (I),16(R)-3-hydroxy-ent-kaurane-12-one (II),16(R)-ent-kaurane-12-one 3α-O-β-D-xyloside (III)。结论化合物II和III为新化合物,分别命名为泽泻二萜醇(oriediterpenol)及泽泻二萜苷(oriediterpenoside),I为已知二萜kaurane-2,12-dione。 相似文献
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苦杏仁临床应用历史悠久,炮制方法繁多,作者通过查阅历代本草、医书古籍及文献资料,对苦杏仁的古代炮制历史沿革进行总结,并整理了历版《中国药典》以及全国各省市中药饮片炮制规范中苦杏仁的炮制品规及炮制方法,全面总结了苦杏仁的炮制历史。经考证,历代医书古籍记载苦杏仁的炮制方法主要有汤浸、研、清炒、麸炒、面炒、焙制、蒸法、药汁制、煨制、酒制、盐制、制霜等,历版《中国药典》收载主要有燀法、炒法,各省市中药饮片炮制规范中主要收载有燀法、炒法、蒸法、制霜等。古代苦杏仁“汤浸去皮尖”、“得火良”理论基本与现在的“燀法”、“杀酶保苷”研究一致,为苦杏仁饮片炮制工艺和质量标准进一步研究提供参考和历史依据。 相似文献
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目的 评价50种中药甲醇提取物对嗜水气单胞菌的体外抑菌效果以及抗生物膜生成活性。方法 采取甲醇浸提的方法制备中药甲醇提取物,计算提取率;利用多功能酶标仪检测600nm处的吸光度(A600)值测定各提取物(0.1、0.2、0.4、0.8、1.6、3.2mg·mL-1)作用16h对嗜水气单胞菌的抑菌率;结晶紫染色法结合多功能酶标仪测定各提取物的抗生物膜活性。结果 苏木、白芍、侧柏叶等32种中药甲醇提取物对嗜水气单胞菌抑菌效果明显,其中苏木甲醇提取物的抑菌效果最显著,最大抑菌率达95.56%,起效质量浓度为0.1mg·mL-1;石菖蒲、大青叶、广藿香等20种中药甲醇提取物明显抑制嗜水气单胞菌生物被膜的生成,其中白芍的最大抑制率达96.78%。结论 夏枯草、野菊花、大青叶、赤芍、石菖蒲、地肤子、连翘、苏木、肉桂、女贞子、白芍、甘草、肉豆蔻、鸡血藤、乌药、莪术、侧柏叶17种中药对嗜水气单胞菌同时具有抑菌和抑制生物膜生长活性。 相似文献
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Margarita Monastyrnaya Elena Leychenko Marina Isaeva Galina Likhatskaya Elena Zelepuga Elena Kostina Evgenie Trifonov Evgenie Nurminski Emma Kozlovskaya 《Toxicon》2010,56(8):1299-1314
Actinoporins Or-A and Or-G from the northern sea anemone Oulactis orientalis and actinoporins RTX-A and RTX-SII from the tropical sea anemone Radianthus macrodactylus (=Heteractis crispa) were compared with each other and with some known actinoporins. In this work the complete amino acid sequence of RTX-SII was determined by molecular biology methods. The following differences were revealed in functionally significant regions of Radianthus, Oulactis, and some other actinoporins: (i) tryptophan is substituted for leucine in the position equivalent to Trp112 in the POC binding site of EqtII; (ii) 13 and 5 residues are truncated in N-terminal regions of Or-A and Or-G, respectively. A possible role of these structural differences in specific regions of the actinoporin sequence was analyzed. Some differences in hydrophobicity parameters, distribution of charged residues, and length of actinoporins’ N-terminus apparently cause considerable differences in their hemolytic activities. Homology models of Radianthus and Oulactis actinoporin monomers were generated using crystal structures of equinatoxin II from Actinia equina and sticholysin II from Stichodactyla helianthus as templates. The current data on actinoporin structures and activities, coupled with results of our earlier differential scanning calorimetric and electrophoretic experiments with RTX-A-modified erythrocyte ghosts (Shnyrov et al., 1992), suggests that the exposed RGD motif located near the POC binding site can interact with membrane integrin(s). 相似文献
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Context: Alismatis rhizome (RA) (Water Plantain Family, also called “Zexie” in Chinese), one of the commonly used components of traditional Chinese medicines, is derived from the dried rhizomes of Alisma orientalis (Sam.) Juzep. (Alismataceae).Objective: This study explores the RA influences on rat cytochrome P450 (CYP) enzymes (CYP1A2, CYP2C9, CYP2E1 and CYP3A4) by using cocktail probe drugs in vivo.Materials and methods: A cocktail solution at a dose of 5?mL/kg, which contained phenacetin (20?mg/kg), tolbutamide (5?mg/kg), chlorzoxazone (20?mg/kg) and midazolam (10?mg/kg), was orally administration to rats treated twice daily with RA (10, 20 and 40?g/kg) for consecutive 14?days. Blood samples (0.2?mL) were collected at a series of time-points and the concentrations of probe drugs in plasma were determined by HPLC-MS/MS. The corresponding pharmacokinetic parameters were calculated by the software of DAS 2.0 (Wenzhou Medical College, Zhejiang, China).Results: In the experiment, there was a statistically significant difference in the t1/2, Cmax, AUC(0-∞) and CL for phenacetin and midazolam, while there was no statistical pharmacokinetics difference for tolbutamide and chlorzoxazone. Our study showed that treatment with multiple doses of RA had an inductive effect on rat CYP1A2 and an inhibitory effect on rat CYP3A4 enzyme activity. However, RA has no inductive or inhibitory effect on the activities of CYP2C9 and CYP2E1.Conclusions: Caution is needed when RA is co-administration with some CYP1A2 or CYP3A4 substrates in clinic, because it may result in treatment failure and herb–drug interactions. 相似文献