Determination of nucleosides and nucleobases is important for the quality control of Fritillaria unibracteata Hsiao et K.C. Hsia var. wabuensis （FUW） due to their physiological and pharmacological actions. In the pr...Determination of nucleosides and nucleobases is important for the quality control of Fritillaria unibracteata Hsiao et K.C. Hsia var. wabuensis （FUW） due to their physiological and pharmacological actions. In the present study, we developed a sensitive and reliable HPLC-diode-array detection method to simultaneously determine ten nucleosides and nucleobases, including cytosine, uracil, cytidine, uridine, thymine, adenine, inosine, guanosine, thymidine and adenosine. Complete separation of all the analytes was achieved on a Zorbax 300 A 300 Extend C18 column with a gradient of methanol-ultrapure water at a flow rate of 1 mL/min in less than 30 min. The diode-array detector wavelength was set at 260 nm for the UV detection of nucleosides and nucleobases. The optimized method provided good linearity （R2〉0.9993 for all the analytes）, satisfactory precision （RSD〈3.715%）, good repeatability （RSD_〈3.748%） and good recovery （RSD from 97.688% to 102.923%）. In addition, the developed method was successfully applied to simultaneous determination of ten nucleosides and nucleobases from FUW, and their content changes of various cultivation time （1-7 years） were further analyzed for the first time. Our findings were useful for ensuring the cultivation time choice of artificial cultivation, quality control, pharmaceutical studies and clinical efficacy of FUW.展开更多
为了研究不同施肥水平下瓦布贝母产量和总生物碱质量分数的差异,确定合理的施肥量。采用三因素五水平二次通用组合设计进行田间试验,在室内进行产量和总生物碱质量分数的测定,根据三元二次通用旋转设计原理对数据进行方差分析,分别建立...为了研究不同施肥水平下瓦布贝母产量和总生物碱质量分数的差异,确定合理的施肥量。采用三因素五水平二次通用组合设计进行田间试验,在室内进行产量和总生物碱质量分数的测定,根据三元二次通用旋转设计原理对数据进行方差分析,分别建立瓦布贝母增重率和总生物碱质量分数与N( X 1)、P( X 2)、 K( X 3)施用量的数学函数模型。结果表明,肥料的增产效果依次为磷肥>氮肥>钾肥,对瓦布贝母生物碱的影响效果为氮肥>钾肥>磷肥。通过数据模型选优,综合考虑产量和总生物碱质量分数,得到合理的肥料施用量:尿素8.98~12.00 kg/hm^2、过磷酸钙38.79~43.37 kg/hm^2、硫酸钾17.44~24.49 kg/hm^2。展开更多
基金The Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20115103110009)"211"Project Double-Support Plan of Sichuan Agricultural Un iversity(Grant No.03570313)Modernization of Chinese Traditional Medicines in Hainan Province(Grant No.ZY201410)
文摘Determination of nucleosides and nucleobases is important for the quality control of Fritillaria unibracteata Hsiao et K.C. Hsia var. wabuensis （FUW） due to their physiological and pharmacological actions. In the present study, we developed a sensitive and reliable HPLC-diode-array detection method to simultaneously determine ten nucleosides and nucleobases, including cytosine, uracil, cytidine, uridine, thymine, adenine, inosine, guanosine, thymidine and adenosine. Complete separation of all the analytes was achieved on a Zorbax 300 A 300 Extend C18 column with a gradient of methanol-ultrapure water at a flow rate of 1 mL/min in less than 30 min. The diode-array detector wavelength was set at 260 nm for the UV detection of nucleosides and nucleobases. The optimized method provided good linearity （R2〉0.9993 for all the analytes）, satisfactory precision （RSD〈3.715%）, good repeatability （RSD_〈3.748%） and good recovery （RSD from 97.688% to 102.923%）. In addition, the developed method was successfully applied to simultaneous determination of ten nucleosides and nucleobases from FUW, and their content changes of various cultivation time （1-7 years） were further analyzed for the first time. Our findings were useful for ensuring the cultivation time choice of artificial cultivation, quality control, pharmaceutical studies and clinical efficacy of FUW.
文摘为了研究不同施肥水平下瓦布贝母产量和总生物碱质量分数的差异,确定合理的施肥量。采用三因素五水平二次通用组合设计进行田间试验,在室内进行产量和总生物碱质量分数的测定,根据三元二次通用旋转设计原理对数据进行方差分析,分别建立瓦布贝母增重率和总生物碱质量分数与N( X 1)、P( X 2)、 K( X 3)施用量的数学函数模型。结果表明,肥料的增产效果依次为磷肥>氮肥>钾肥,对瓦布贝母生物碱的影响效果为氮肥>钾肥>磷肥。通过数据模型选优,综合考虑产量和总生物碱质量分数,得到合理的肥料施用量:尿素8.98~12.00 kg/hm^2、过磷酸钙38.79~43.37 kg/hm^2、硫酸钾17.44~24.49 kg/hm^2。
