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目的:考察苍耳草不同生长期时其绿原酸的含量变化。方法:用高效液相色谱(HPLC)法测定不同生长期绿原酸的含量。固定相为Alltima TMC18柱(250 mm×4.6 mm,5μm),流动相为甲醇-0.1%磷酸水溶液梯度洗脱,柱温25℃,流速0.8 mL.min-1,检测波长326 nm。结果:绿原酸在11~88.6μg.mL-1范围内其峰面积与浓度之间呈现良好的线性关系(r2=0.999 9),精密度的RSD小于0.81%,平均提取回收率为97.33%。苍耳草中绿原酸的含量以5月份最高,依次降低至8月份,然后9、10月份陆续升高。结论:根据绿原酸的含量,苍耳草的最佳采收期为5月份。 相似文献
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目的:研究不同采收期忍冬藤有效成分马钱苷的含量,为忍冬藤的最佳采收期提供参考。方法:采用反相高效液相色谱法,色谱柱为Agilent DB C18(250 mm×4.6 mm,5μm);流动相为甲醇-磷酸盐缓冲液(23∶77),流速1.0 mL/min;柱温30℃;检测波长236 nm。结果:不同采收期忍冬藤药材中马钱苷含量差异有统计学意义。结论:忍冬藤的最佳采收期为每年的十一月中旬至十二月上旬。 相似文献
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目的:探讨草珊瑚药材的采收及最佳采收期。方法高效液相色谱法测定异秦皮啶、迷迭香酸含量。结果异嗪皮啶在根中含量最高,其次是茎,叶中含量最低;迷迭香酸的含量则在叶中含量最高,根及茎中含量较低;不同的采收月份草珊瑚中有效成分的含量差异较大,异嗪皮啶的含量以3月、6月、7月3个月为最高;迷迭香酸的含量以2月、3月、11月、12月4个月的含量较高。结论草珊瑚药材的采收应以全草为宜,采收期为每年的2~7月较为适宜。 相似文献
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吴婉琴俞雨梁睿许哲王霄干国平 《中国药师》2017,(4):736-738
摘 要 目的:探讨合欢皮中木脂素苷Ⅰ含量的变化规律,为确定合欢皮的采收期提供科学依据。方法: 采用HPLC法,色谱柱为Boston Green ODS C18(250 mm×4.6 mm,5 μm),流动相为乙腈-0.04%磷酸水溶液(18∶82),流速为1.0 ml·min-1,检测波长204 nm,柱温25℃。结果: 不同采收期合欢皮中木脂素苷Ⅰ含量差异明显。木脂素苷Ⅰ在1月含量最高,1~3月含量骤降,4~12月含量逐渐升高。结论:不同采收期合欢皮中木脂素苷Ⅰ的含量不同,确定合欢皮的最佳采收期应为11月~次年1月。 相似文献
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目的:采用高效液相色谱法测定不同来源不同采收期忍冬藤和金银花中绿原酸的含量。方法:色谱柱:Waters C18(250 mm×4.6 mm,5μm);流动相:乙腈-0.4%磷酸溶液(10∶90);检测波长:327 nm;流速:1.0 ml·min-1;柱温:30℃。以外标法测定6个不同采收期、3种来源的忍冬藤和金银花中绿原酸的含量。结果:绿原酸进样量在0.065~1.300μg范围内与峰面积呈良好的线性关系(r=0.999 8)。9、10月采收的忍冬藤中绿原酸的含量最高,三种来源的忍冬藤中无毛淡红忍冬藤中绿原酸的含量最高。结论:忍冬藤中绿原酸的含量高低与采收时间有一定的关系,本研究为忍冬藤药材的采收加工提供了一定的理论依据。 相似文献
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目的 测定不同采收期紫丁香叶中原儿茶酸、原儿茶醛、酪醇的含量。方法 采用RP-HPLC直接测定。YWG-C18色谱柱(4.6 mm×250 mm,10 μm);流动相为甲醇-0.125%冰醋酸溶液(10︰90),流速1.0 mL·min-1;检测波长275 nm。结果 原儿茶酸在0.08~0.56 μg内呈良好线性,回归方程为Y = 83 995 X-10 368, r = 0.999 5;原儿茶醛在0.01~0.07 μg内呈良好线性,回归方程为Y = 111 202 X-35 323, r =0.999 8;酪醇在0.42~2.94 μg内呈良好线性,回归方程为Y = 139 922 X-32 003, r = 0.999 6。紫丁香叶中原儿茶酸的含量10月份最高,原儿茶醛和酪醇的含量4月份最高。结论 该方法简便、快速、准确可靠,适用于紫丁香叶中原儿茶酸、原儿茶醛、酪醇多种成分的同时测定;适用于紫丁香叶的质量控制。结果表明紫丁香叶以10月份或4~5月份采收为宜。 相似文献
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《中国药房》2015,(12):1698-1699
目的:对不同生长期粤北产广山药中尿囊素含量进行研究,确定粤北产广山药的最佳采收期。方法:采用高效液相色谱法。色谱柱为Diamonsil C18,流动相为甲醇-水(5∶95,V/V),流速为1.0 ml/min,检测波长为224 nm,柱温为30℃,进样量为20μl。分别测定不同生长期粤北产广山药中尿囊素的含量。结果:尿囊素进样量在0.218 2~1.309 2μg范围内与峰面积呈良好线性关系(r=0.999 6,n=6);精密度、稳定性、重复性试验的RSD≤1.1%;平均加样回收率为102.54%(RSD=1.43%,n=6)。粤北产广山药中尿囊素含量在生长期第1~8个月内逐渐升高,并于第8~10个月时达到峰值。结论:该方法操作简单、可靠、重复性好,可为粤北产广山药质量控制提供科学依据;以尿囊素为指标,粤北产广山药的最佳采收期为生长到第8~10个月之间。 相似文献
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高速逆流色谱分离纯化紫苏叶中迷迭香酸 总被引:1,自引:0,他引:1
目的:建立高速逆流色谱分离纯化紫苏叶中迷迭香酸的方法。方法:采用高速逆流色谱分离纯化紫苏叶乙酸乙酯萃取部分中迷迭香酸,以石油醚-乙酸乙酯-甲醇-0.5%醋酸水溶液(2∶5∶2∶5)为溶剂体系,上相为固定相,下相为流动相,流速2.0 mL.min-1,主机转速800 r.min-1,温度25℃。结果:每0.20 g紫苏叶乙酸乙酯萃取物经1次纯化,纯度为98.6%的迷迭香酸的得率约13%。结论:高速逆流色谱可高效分离纯化紫苏叶中的迷迭香酸。 相似文献
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固相微萃取-气相色谱-质谱联用分析白苏子挥发性化学成分 总被引:2,自引:0,他引:2
目的分析白苏子中挥发性成分的组成,为其开发利用提供科学依据。方法采用固相微萃取(SPME)法萃取白苏子中的挥发性物质,并用气相色谱-质谱(GC-MS)法对其挥发性化学成分进行分析。结果共分离出60个色谱峰,并且确定了其中47个成分,占挥发性成分总量的89.73%。其中主要化学成分是羊脂酸(8.94%),正己醛(8.31%),天竺葵醛(6.27%),(E,E)-3,5-辛二烯-2-酮(5.19%)。结论白苏子中含有丰富的挥发性成分,SPME-GC-MS联用能全面快速获得其组成信息,可应用于白苏子挥发性成分的分析。 相似文献
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目的分离、鉴定酸浆中的苦味素类化学成分。方法采用大孔树脂、硅胶柱色谱分离纯化,经理化常数和谱学方法鉴定结构。结果分离鉴定了4个化合物,分别为酸浆苦味素A(1)、酸浆苦味素D(2)、酸浆苦味素P(3)、4,7二去氢7脱氧新苦味素L(4)。结论4,7二去氢7脱氧新苦味素L为新的天然产物。 相似文献
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SHI Rui JIA Ling-yun SUN Qi-shi YU Dan-dan 《药物分析杂志》2008,28(2):260-262
目的:采用 RP-HPLC 建立同时测定酸浆药材中酸浆苦味素 A、酸浆苦味素 D 及木犀草素含量的方法。方法:分析柱采用 Diamonsil C_(18)(200 mm×4.6 mm,5 μm)色谱柱,流动相为甲醇-0.2%醋酸(45:55,v/v);流速:1.0 mL·min~(-1);检测波长:220 nm。结果:酸浆苦味素 A、酸浆苦味素 D 及木犀草素浓度分别在0.15~1.20 mg·mL~(-1)(r=0.9995),0.10~0.81 mg·mL~(-1)(r=0.9996),0.12~0.96 mg·mL~(-1)(r=0.9997)范围内与峰面积呈良好的线性关系,酸浆苦味素 A 平均回收率分别为95.9%,97.1%,103%;RSD 分别为2.0%,0.7%,1.4%。酸浆苦味素 D 的平均回收率分别为97.3%,101%,97.1%;RSD 分别为1.0%,1.9%,1.3%。木犀草素的平均回收率分别为97.8%,97.8%,97.7%;RSD 分别为0.4%,2.9%,0.5%。结论:采用 RP-HPLC 同时测定酸浆药材中酸浆苦味素 A、酸浆苦味素 D 及木犀草素3种成分的含量,该法简单、可靠,可作为控制酸浆药材质量的参考标准。 相似文献
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In vitro and in vivo effects of macrophage-stimulatory polysaccharide from leaves of Perilla frutescens var. crispa 总被引:2,自引:0,他引:2
Kwon KH Kim KI Jun WJ Shin DH Cho HY Hong BS 《Biological & pharmaceutical bulletin》2002,25(3):367-371
The crude polysaccharide (PFB-1) was isolated from the leaves of Perilla frutescens var. crispa by the sequential procedures with hot-water extraction, methanol reflux, and ethanol precipitation. It was further purified by anion column chromatography in order to obtain the partially purified polysaccharide (PFB-1-0). In the presence of PFB-1-0, strong cellular lysosomal enzyme activity of murine peritoneal macrophages was observed in vitro. Compared to bacterial lipopolysaccharide (LPS), its activity was relatively high. The in vitro phagocytic activity was enhanced by PFB-1-0 as the similar pattern in both gram-negative bacteria, E. coli, and gram-positive bacteria, S. aureus with a time-dependent manner. We also investigated the production of several mediators by murine peritoneal macrophages upon stimulation with PFB-1 (in vivo) or PFB-1-0 (in vitro). The levels of nitric oxide (NO) and tumor necrosis factor (TNF)-alpha were increased in the presence of PFB-1-0 in vitro. The PFB-1 stimulated the production of interleukin (IL)-6 and granulocyte-macrophage colony-stimulating factor (GM-CSF) in vivo. Results suggest that the polysaccharide from P. frutescens var. crispa represents an immunopotentiator and biological response modifiers in vitro and in vivo levels. 相似文献
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中药锦灯笼化学成分的分离与鉴定 总被引:1,自引:0,他引:1
目的研究中药锦灯笼(Physalis alkekengiL.var.franchetii(Mast.)Makino)的宿萼和果实的化学成分。方法采用乙醇提取,硅胶柱色谱分离纯化,根据理化性质和波谱数据鉴定结构。结果分离得到11个化合物,分别鉴定为4,7-二脱氢新酸浆苦素B(4,7-didehydroneophysalin B,1)、酸浆苦素D(physalin D,2)、酸浆苦素P(physalin P,3)、木犀草素(luteolin,4)、木犀草素-7-葡萄糖苷(lute-olin-7-O-glucoside,5)、3′,4′-二甲氧基杨梅皮素(3′,4′-dimethoxymyricetin,6)、柠檬酸二甲酯(1,5-dimethyl citrate,7)、5-羟甲基糠酸(5-hydroxymethylfuroic acid,8)、环(酪-亮)二肽(cyclo(tyrosine-amidocaproic)-bipeptide,9)、β-谷甾醇(β-sitosterol,10)、胡萝卜苷(daucosterol,11)。结论化合物6~9为首次从该植物中分离得到的已知化合物。 相似文献
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A new essential oil chemotype of Perilla frutescens was found in that plant variety from Che-ju island in Korea. The steam-distilled oil of this plant was examined by GC-MS and 32 compounds were identified. Its principal constituents were beta-caryophyllene, dillapiol and nothoapiol. Also, crossing experiments were performed between the new chemotype and known chemotypes to clarify the genetic control of the production of nothoapiol. The gene Na, which promotes conversion from dillapiol to nothoapiol, was suggested, and was considered to be closely linked with the allele D. 相似文献
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Intoxication of cattle by Perilla frutescens (purple mint) 总被引:1,自引:0,他引:1
Perilla frutescens or purple mint has been associated with atypical interstitial pneumonia (AIP) for a quarter of a century. The amount and the stage of the plant required to produce AIP have been much debated. A field case in which catastrophic loses occurred in cattle ingesting hay containing purple mint showed that more than the green plants have the capability of producing atypical interstitial pneumonia. In this study, Perilla frutescens produced atypical interstitial pneumonia in three of five calves to which it was given. The amount required to produce the syndrome ranged from 2.3 to 15.5 kg of green seed stage mint and 11.8 kg of mint hay. The toxic syndromes were similar in signs, but quite different in duration. Necropsy examinations showed varied amounts of pulmonary emphysema and edema. Two of the three affected animals' lungs histologically displayed a marked proliferation of Type II pneumocytes. The flowering or seed parts of perilla mint were found by high pressure liquid chromatographic analysis to contain the highest concentration of perilla ketone, considered the most toxic agent involved. This stage of plant growth was also shown to be the most toxic in our calf feeding trial. Calves fed the flowering plant developed the toxic syndrome while those fed earlier plants (collected before seed stage) and late plants (collected after frost) remained asymptomatic. The time of year when perilla reaches the seed stage often corresponds to periods when pasture grass is scarce forcing cattle to consume plants not normally eaten when ample desirable forage is available.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献