目的创建一种能够快速测定南葶苈子药材中芥子碱硫氰酸盐(sinapine thiocyanate,SH),槲皮素-3-O-β-D-葡萄糖-7-0-β-D-龙胆双糖苷(quercetin-3-O-beta-D-glucose-7-O-beta-D-gentiobioside,QGG),异鼠李素-3-O-β-D-吡喃葡萄糖苷(isorha...目的创建一种能够快速测定南葶苈子药材中芥子碱硫氰酸盐(sinapine thiocyanate,SH),槲皮素-3-O-β-D-葡萄糖-7-0-β-D-龙胆双糖苷(quercetin-3-O-beta-D-glucose-7-O-beta-D-gentiobioside,QGG),异鼠李素-3-O-β-D-吡喃葡萄糖苷(isorhamnetin-3-O-glucoside,IG),槲皮素-3-O-β-D-吡喃葡萄糖苷(quercetin3-O-β-D-glucopyranoside,QG)4种成分的方法。方法高效液相色谱法(high performance liquid chromatography,HPLC)测定南葶苈子样品中SH、QGG、IG、QG的含量,采用偏最小二乘法(partial least squares method,PLS)建立南葶苈子中SH、QGG、IG、QG的定量分析模型。结果所创建的QGG、QG、IG、SH的定量分析模型的内部交叉验证决定系数(R2)分别为0.9270、0.9266、0.8086、0.8289;校正均方差(root mean square error of calibration,RMSEC)分别为0.0100、0.00263、0.00313、0.111;验证均方差(root mean square error of prediction,RMSEP)分别为0.0139、0.00715、0.00395、0.0860。其中SH的特征光谱为9100~6100 cm-1;QGG的特征光谱为7300~5500 cm-1;IG的特征光谱为9500~6700 cm-1;QG的特征光谱为8200~5100 cm-1。结论利用傅里叶红外光谱建立的定量模型,能够对南葶苈子药材中QGG、QG、IG、SH的含量进行无损测定。此外通过近红外光谱PCA分析发现道地产地南葶苈子与非道地产地南葶苈子的差异较大,道地产地南葶苈子之间的差异较小。展开更多
197Au were irradiated with 47 MeV/u 12C ions. Iridium was produced via the multinucleon transfer reactions in bombardments of 197Au with 12C. and was separated radiochemically from Au and the mixture of the reaction p...197Au were irradiated with 47 MeV/u 12C ions. Iridium was produced via the multinucleon transfer reactions in bombardments of 197Au with 12C. and was separated radiochemically from Au and the mixture of the reaction products. The γ radioactivities of Ir isotopes were measured by using a HPGe detector. The production cross sections of Ir isotopes were determined from activities of Ir isotopes at the end of bombardment and the other relative data. It has been found that the cross sections for neutron-rich isotopes of iridium show an exponential dependence on the values of Qgg. Our experimental results also demonstrate lack of correlation between the cross sections and Qgg in the case of neutron-deficient isotopes of iridium. The fact can be explained from that neutron-rich isotopes of iridium were produced in the deep inelastic transfer reactions.展开更多
文摘目的创建一种能够快速测定南葶苈子药材中芥子碱硫氰酸盐(sinapine thiocyanate,SH),槲皮素-3-O-β-D-葡萄糖-7-0-β-D-龙胆双糖苷(quercetin-3-O-beta-D-glucose-7-O-beta-D-gentiobioside,QGG),异鼠李素-3-O-β-D-吡喃葡萄糖苷(isorhamnetin-3-O-glucoside,IG),槲皮素-3-O-β-D-吡喃葡萄糖苷(quercetin3-O-β-D-glucopyranoside,QG)4种成分的方法。方法高效液相色谱法(high performance liquid chromatography,HPLC)测定南葶苈子样品中SH、QGG、IG、QG的含量,采用偏最小二乘法(partial least squares method,PLS)建立南葶苈子中SH、QGG、IG、QG的定量分析模型。结果所创建的QGG、QG、IG、SH的定量分析模型的内部交叉验证决定系数(R2)分别为0.9270、0.9266、0.8086、0.8289;校正均方差(root mean square error of calibration,RMSEC)分别为0.0100、0.00263、0.00313、0.111;验证均方差(root mean square error of prediction,RMSEP)分别为0.0139、0.00715、0.00395、0.0860。其中SH的特征光谱为9100~6100 cm-1;QGG的特征光谱为7300~5500 cm-1;IG的特征光谱为9500~6700 cm-1;QG的特征光谱为8200~5100 cm-1。结论利用傅里叶红外光谱建立的定量模型,能够对南葶苈子药材中QGG、QG、IG、SH的含量进行无损测定。此外通过近红外光谱PCA分析发现道地产地南葶苈子与非道地产地南葶苈子的差异较大,道地产地南葶苈子之间的差异较小。
基金Supported by National Natural Science Foundation of China (10575118)
文摘197Au were irradiated with 47 MeV/u 12C ions. Iridium was produced via the multinucleon transfer reactions in bombardments of 197Au with 12C. and was separated radiochemically from Au and the mixture of the reaction products. The γ radioactivities of Ir isotopes were measured by using a HPGe detector. The production cross sections of Ir isotopes were determined from activities of Ir isotopes at the end of bombardment and the other relative data. It has been found that the cross sections for neutron-rich isotopes of iridium show an exponential dependence on the values of Qgg. Our experimental results also demonstrate lack of correlation between the cross sections and Qgg in the case of neutron-deficient isotopes of iridium. The fact can be explained from that neutron-rich isotopes of iridium were produced in the deep inelastic transfer reactions.
