共查询到19条相似文献,搜索用时 62 毫秒
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复方丹参注射液中水溶性酚酸总量的测定 总被引:3,自引:0,他引:3
研究建立复方丹参注射液中水溶性酚酸总量的测定方法,以控制该制剂的内在质量。在1mol/L的冰醋酸溶剂中,利用丹参中水溶性酚酸类成分与铁氰化钾—三氯化铁的显色反应,比色法测定该制剂中水溶性酚酸(以原儿茶醛计)的总量。结果显示,原儿茶醛在0.4448—2.002μg/mL范围内呈良好的线性关系,回归方程为:A=0.05237C 0.07654(r=0.9998),加样平均回收率为100.0%,RSD为0.93%。该法简便快速,结果准确,重现性好,可用于该制剂的质量控制。 相似文献
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探讨丹参水溶性提取物丹参酚酸B的制备及其生物转化应用研究。以丹参酚酸B的出膏率和提取率为评价指标,比较丹参水溶性提取法包括水煎煮回流法、超声提取法、渗漉提取法,采用高效液相色谱(HPLC)法测定。研究发现,常规水煎煮回流法中丹参酚酸B提取率最高可达72.59%,远高于超声提取法的63.72%和渗漉提取法的65.69%(P<0.05)。丹参酚酸B的生物转化应用结果显示,100 g丹参酚酸B可以制备出14.2 g丹参素(纯度≥95%)和35.8 g Prewalskinic acid A(纯度≥91%),转化效率高。对丹参水溶性提取物丹参酚酸B的制备工艺进行了相关研究,获得了简便、高效、科学的工艺路线,该研究为丹参的进一步开发和实际应用奠定了理论和实践基础。 相似文献
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NaNO2-Al(NO3)3显色测定丹参及其制剂中水溶性酚酸总量 总被引:5,自引:1,他引:4
研究建立丹参及丹参制剂中水溶性酚酸总量的测定方法,以其中水溶性酚酸总量可作为质量控制指标之一。利用丹参中水溶性酚酸类成分与亚硝酸钠和硝酸铝溶液在碱性条件下的显色反应,比色法测定丹参及其制剂中水溶性酚酸(以原儿茶醛计)的总量。原儿茶醛在3.336~14.46μg/mL范围内呈良好的线性关系,回归方程为:A:0.02777c+0.01279(r=0.9996),加样平均回收率为100.8%,RSD为0.96%。该法可用于丹参及其制剂的质量控制。 相似文献
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目的:优化丹参水溶性成分丹酚酸B的醇沉工艺方法:以溶液中总固体率、丹酚酸B的损失率以及丹酚酸B的含量作为指标,醇沉的体积分数、相对密度、温度、时间为影响因素,优化丹酚酸B的醇沉工艺结果:最佳条件为减压浓缩至相对密度1.05~1.15,边搅拌边加入95%乙醇,调乙醇含量至70%,在10~35℃环境下静置24 h,总固体去除率为27.3%,丹酚酸B的损失率4.96%,丹酚酸B的含量为13.81%。结论:该方法简单可行,可用于醇沉纯化丹参中丹酚酸B。 相似文献
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以雷别卡霉素和星形孢菌素为主要对象,陈述其合成过程中的基因、酶和中间产物。吲哚咔唑类化合物的生物合成主要分为吲哚环的形成、糖基的形成以及两者的连接。起始物色氨酸经过色氨酸修饰、双吲哚吡咯的形成和氧化环的闭合形成吲哚环,通过糖基转移酶将吲哚咔唑核心和糖基连接合成目标化合物。 相似文献
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青蒿素生物合成研究进展综述 总被引:2,自引:0,他引:2
综述了青蒿素生物合成的研究进展,涉及青蒿素植物组织的培养、生物合成中生理生态因子的影响、生物培养体系的建立及生物合成场所、合成路线、合成关键酶及基因调控等方面的研究,并对青蒿素生物合成的发展前景进行了展望。 相似文献
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用水蒸气蒸馏法提取白花丹参与紫花丹参干燥根挥发油,用气相色谱-质谱(GC/MS)联用法进行了分析测定,分别鉴定出43种和18种成分,占挥发油色谱总峰面积的84.55%和79.69%,其中共有组分为11种。白花丹参相对质量分数较高的组分为蛇麻烷(27.78%)、合铁锈醇(26.13%)和1R-[1.α(R*),4a,8aα]-α-乙烯基十氢-α,5,5,8a-四甲基-2-亚甲基,1-萘丙醇(17.37%),而紫花丹参相对质量分数较高的组分为合铁锈醇(44.39%)和7-异丙基-1,1,4a-三甲基-1,2,3,4,4a,9,10,10a-八氢菲内酯(23.41%)。实验表明,白花丹参与紫花丹参挥发油中化学成分差别很大。 相似文献
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Yao Cao Rui Chen Wen-Tao Wang Dong-Hao Wang Xiao-Yan Cao 《International journal of molecular sciences》2021,22(15)
Salvia miltiorrhiza is a renowned model medicinal plant species for which 15 SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) family genes have been identified; however, the specific functions of SmSPLs have not been well characterized as of yet. For this study, the expression patterns of SmSPL6 were determined through its responses to treatments of exogenous hormones, including indole acetic acid (IAA), gibberellic acid (GA3), methyl jasmonic acid (MeJA), and abscisic acid (ABA). To characterize its functionality, we obtained SmSPL6-ovexpressed transgenic S. miltiorrhiza plants and found that overexpressed SmSPL6 promoted the accumulation of phenolic acids and repressed the biosynthesis of anthocyanin. Meanwhile, the root lengths of the SmSPL6-overexpressed lines were significantly longer than the control; however, both the fresh weights and lateral root numbers decreased. Further investigations indicated that SmSPL6 regulated the biosynthesis of phenolic acid by directly binding to the promoter regions of the enzyme genes Sm4CL9 and SmCYP98A14 and activated their expression. We concluded that SmSPL6 regulates not only the biosynthesis of phenolic acids, but also the development of roots in S. miltiorrhiza. 相似文献
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《分离科学与技术》2012,47(15):2330-2337
Tanshinone IIA (TS) and cryptotanshinone (CT) are phenolic compounds which show significant biological potential. This study deals with the optimization and kinetics of TS and CT extraction from the rhizome of Salvia miltiorrhiza Bunge in a stirred batch extraction. The influence of various extraction parameters on the extraction yield has been studied. The optimum extraction conditions are 85% ethanol, solid to solvent ratio of 1:20, 333.15 K of temperature, agitation speed of 300 rpm, 0.09 to 0.125 mm of powder size and extraction time 30 min. 2.72 mg and 1.78 mg per gram of the rhizome powder of Salvia miltiorrhiza Bunge for TS and CT are obtained in the optimum extraction conditions, respectively. The extraction kinetics behavior of TS and CT from the rhizome powder of Salvia miltiorrhiz Bunge reveals that the extraction of TS and CT follows the first order kinetics. The kinetic expression developed by Spiro and Siddique is used and the model is in good agreement with the experimental results. The activation energy for the extraction of TS and CT is found to be 16.05 kJ/mol and 18.82 kJ/mol, respectively. 相似文献
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介绍了3种煤焦油提酚工艺:硫酸法、二氧化碳法和萃取法,同时对酚精馏单元提出了流程的优化方案:该单元流程采用5个常规精馏塔和1个不合格产品塔的精馏方案。通过比较和分析,建议煤焦油提酚工艺采用二氧化碳法;酚精馏单元采用顺序流程法和连续精馏方式。 相似文献