共查询到17条相似文献,搜索用时 46 毫秒
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简要介绍了莽草酸的生物活性,综述了莽草酸的提取工艺,分析了其目前的研究热点及存在的问题,最后展望了发展前景。 相似文献
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研究了微波辅助提取松针中莽草酸的提取工艺,考察了微波温度、料液比、微波功率、乙醇浓度和微波时间等因素对莽草酸提取率的影响,通过正交试验优化了提取工艺。结果表明,松针中莽草酸提取的最佳工艺条件为:微波温度35℃,料液比1∶20(g/mL),微波功率550W,乙醇浓度35%,微波时间90s,在此条件下,莽草酸的提取率可达11.312mg/g。 相似文献
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目的建立大花八角中莽草酸含量测定的方法,初步考察莽草酸提取工艺。方法采用岛津Wonda Sil C18 Superb色谱柱(4.6 mm×250mm,5μm),以甲醇-0.08%磷酸溶液(2∶98)为流动相,流速0.6 m L/min,检测波长203 nm,柱温25℃。样品固定浸泡时间为40 min,超声提取,温度为25℃,甲醇为提取溶剂,考察超声时间、液料比和溶剂比三个单因素对提取率的影响。结果平均回收率为100.97%,RSD为0.94%,莽草酸含量为113.01 mg/g,提取率为11.24%;超声时间最佳为30 min,提取液料比最佳为25∶1(g/m L),溶剂比为100%甲醇。结论超声时间,溶剂比,液料比对莽草酸提取率影响明显,HPLC含量测定方法可行。 相似文献
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离子交换树脂对白扦中莽草酸的分离纯化 总被引:1,自引:0,他引:1
建立了离子交换树脂分离纯化白扦中莽草酸的工艺条件和参数。通过研究D261、D296、D301-R、D301-G、D290、201*7(717)、D201和D280共8种离子交换树脂对莽草酸的吸附和解吸附能力,筛选出最佳树脂为D290,确定了最佳的吸附与解吸附工艺参数,吸附条件为pH=6、25 ℃、流速为3 mL/min;脱附条件为:洗脱液为2.5%NaOH水溶液,洗脱流速为3 mL/min。莽草酸样品溶液经D290树脂吸附与脱附后回收率为92.53%,纯度由2.97%提高到46.76%,提高了15.74倍。实验结果表明,D290树脂对莽草酸的吸附量大,脱附容易,可以应用于莽草酸的分离纯化。 相似文献
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将莽草酸接枝固定在聚乳酸(PLA)非织造布上,旨在开发可应用于医疗卫生领域的新型多功能保健材料。莽草酸接枝处理中,选用交联剂PC-100与IPDI进行架桥试验。通过调整反应温度、浓度等参数,优化反应条件,测试了PLA非织造布的透气性、导湿性、硬挺度及抗菌性。试验得出的接枝最佳工艺是:PC-100用量0.2 g,莽草酸质量浓度为9 g/L,浸渍温度60℃,120℃焙烘3 min,之后用乙醇和蒸馏水进行润洗。处理后的PLA非织造布具有良好的抗菌性,对大肠埃希菌和金黄葡萄球菌的抗菌率分别达到了77.3%和72.7%。 相似文献
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建立了采用高效液相色谱法快速测定发酵液中蔗糖、莽草酸和芳香族氨基酸含量的方法,为微生物发酵生产莽草酸的工艺控制提供便捷. 色谱条件为:Hypersil APS-2色谱柱(5 mm, 250 mm×4.6 mm),检测波长215 nm,示差检测器和紫外检测器联用,流动相为pH 2.5的磷酸水溶液和乙腈(体积比20:80),柱温30℃,流速1.0 mL/min,进样量10 mL. 在该条件下所测各物质的线性回归方程相关系数均大于0.9986,加样回收率为95%~105%,相对标准偏差均小于2.0%. 相似文献
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Shikimic acid is used as a precursor for the synthesis of oseltamivir phosphate (Tamiflu®), which is used as an anti‐viral for the H5N1 strain. As concern for this virus increases, demand for medicinal products capable of treating it increases, while shikimic acid resources remain limited. In this study, for the first time shikimic acid is extracted from pine needles using water at relatively low temperature. After the subsequent evaporation, column adsorption/desorption and crystallization processes, shikimic acid crystals with a purity of over 98 % are obtained. A total recovery of approximately 85 % is reached, with the highlights of the method being simplicity, low cost and industrial practicality. 相似文献
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Shikimic acid (SA) is the drug lead of oseltamivir phosphate (Tamiflu®). The pharmaceutical industry has great demand for SA to match the production of the drug. This article describes the development of an integrated expanded-bed adsorption chromatography (EBAC) system and its application in SA extraction and separation. The hydrodynamic behavior of an expanded-bed ion exchange resin, D293, was investigated to show that D293 resin is able to act as an adsorbent for recovery of SA from Illicium verum. SA was extracted from 8 g of I. verum in 150 mL of deionized water at an expansion ratio of 1.4 via integrated EBAC at 40°C. The SA was then eluted in 200 mL of a 2% NaCl solution. The recovery rate of SA was 96.7% and its purity was 59.6%. Different methods were compared, and the results indicated that the method developed in this article is promising for the recovery of SA from I. verum. The process efficiency of the integrated method was 2.6 times higher than that of the conventional method, while its energy efficiency was about 6 times of that of the conventional method. 相似文献
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