An improved method is proposed for the extraction of the symmetry energy coefficient relative to the temperature,a_(sym)/T,in the heavy-ion reactions near the Fermi energy region,based on the modified Fisher Model.Thi...An improved method is proposed for the extraction of the symmetry energy coefficient relative to the temperature,a_(sym)/T,in the heavy-ion reactions near the Fermi energy region,based on the modified Fisher Model.This method is applied to the primary fragments of antisymmetrized molecular dynamics(AMD)simulations for ^(46)Fe+^(46)Fe,^(40)Ca+^(40)Ca and ^(48)Ca+^(48)Ca at 35 MeV/nucleon,in order to make direct comparison to the results from the K(N,Z)method of Ono et al.In our improved method,the extracted values of a_(sym)/T increase as the size of isotopes increases whereas,in the K(N,Z)method,the results show rather constant behavior.This increase in our result is attributed to the surface contribution of the symmetry energy in finite nuclei.In order to evaluate the surface contribution,the relation a_(sym)/T=[a_(sym)^((V))(1-k_(S/V) A^(-1/3))]/T is applied and k_(S/V)=1.20~1.25 was extracted.This value is smaller than those extracted from the mass table,reflecting the weakened surface contribution at higher temperature regime.Δμ/T,the difference of the neutron-proton chemical potentials relative to the temperature,is also extracted in this method at the same time.The average values of the extractedΔμ/T,Δμ/T show a linear dependence on the proton-neutron a_(sym)metry parameter of the system,δ_(sys),andΔμ/T=(15.1±0.2)δ_(sys)-(0.5±0.1)is obtained.展开更多
目的建立附子理中丸HPLC数字化指纹图谱,为其质量控制提供依据。方法采用Century SIL C18 BDS色谱柱(250mm×4.6mm,5μm),流动相为1%冰醋酸水-1%冰醋酸甲醇低压梯度洗脱,检测波长:280nm,柱温:30℃,进样量:5μL。用"中药色谱指...目的建立附子理中丸HPLC数字化指纹图谱,为其质量控制提供依据。方法采用Century SIL C18 BDS色谱柱(250mm×4.6mm,5μm),流动相为1%冰醋酸水-1%冰醋酸甲醇低压梯度洗脱,检测波长:280nm,柱温:30℃,进样量:5μL。用"中药色谱指纹图谱超信息特征数字化评价系统3.0"软件从分离度、信息量、相似度等6个方面对不同批次的附子理中丸指纹图谱进行潜信息特征数字化评价。同时以双参照物体系标定指纹峰的峰位、洗脱动量数ε、折合相对积分φ。结果建立了附子理中丸HPLC数字化指纹图谱,以5-羟甲基糠醛峰为参照物峰,确定31个共有峰,获得了判别附子理中丸质量的重要数字信息,以双定性双定量相似度法评价附子理中丸批间质量稳定。结论所建立HPLC数字化指纹图谱具有较好的精密度和重现性,适用于附子理中丸的质量控制。展开更多
目的对羌活(Notopterygium incisumTing ex H.T.Chang)的水溶性部分化学成分进行研究。方法采用开放ODS柱色谱和凝胶柱色谱分离纯化,NMR、MS等波谱技术分析鉴定结构。结果分离并鉴定了5个化合物,分别为绿原酸(chlorogenic acid,1)、紫...目的对羌活(Notopterygium incisumTing ex H.T.Chang)的水溶性部分化学成分进行研究。方法采用开放ODS柱色谱和凝胶柱色谱分离纯化,NMR、MS等波谱技术分析鉴定结构。结果分离并鉴定了5个化合物,分别为绿原酸(chlorogenic acid,1)、紫花前胡苷(nodakenin,2)、香柑酚OβD吡喃葡萄糖苷(bergaptolOβDglucopyranoside,3)、前胡苷Ⅴ(decurosideⅤ,4)和阿魏酸(fer-ulic acid,5)。结论其中绿原酸为首次从羌活中分离得到。展开更多
文摘An improved method is proposed for the extraction of the symmetry energy coefficient relative to the temperature,a_(sym)/T,in the heavy-ion reactions near the Fermi energy region,based on the modified Fisher Model.This method is applied to the primary fragments of antisymmetrized molecular dynamics(AMD)simulations for ^(46)Fe+^(46)Fe,^(40)Ca+^(40)Ca and ^(48)Ca+^(48)Ca at 35 MeV/nucleon,in order to make direct comparison to the results from the K(N,Z)method of Ono et al.In our improved method,the extracted values of a_(sym)/T increase as the size of isotopes increases whereas,in the K(N,Z)method,the results show rather constant behavior.This increase in our result is attributed to the surface contribution of the symmetry energy in finite nuclei.In order to evaluate the surface contribution,the relation a_(sym)/T=[a_(sym)^((V))(1-k_(S/V) A^(-1/3))]/T is applied and k_(S/V)=1.20~1.25 was extracted.This value is smaller than those extracted from the mass table,reflecting the weakened surface contribution at higher temperature regime.Δμ/T,the difference of the neutron-proton chemical potentials relative to the temperature,is also extracted in this method at the same time.The average values of the extractedΔμ/T,Δμ/T show a linear dependence on the proton-neutron a_(sym)metry parameter of the system,δ_(sys),andΔμ/T=(15.1±0.2)δ_(sys)-(0.5±0.1)is obtained.
文摘目的建立附子理中丸HPLC数字化指纹图谱,为其质量控制提供依据。方法采用Century SIL C18 BDS色谱柱(250mm×4.6mm,5μm),流动相为1%冰醋酸水-1%冰醋酸甲醇低压梯度洗脱,检测波长:280nm,柱温:30℃,进样量:5μL。用"中药色谱指纹图谱超信息特征数字化评价系统3.0"软件从分离度、信息量、相似度等6个方面对不同批次的附子理中丸指纹图谱进行潜信息特征数字化评价。同时以双参照物体系标定指纹峰的峰位、洗脱动量数ε、折合相对积分φ。结果建立了附子理中丸HPLC数字化指纹图谱,以5-羟甲基糠醛峰为参照物峰,确定31个共有峰,获得了判别附子理中丸质量的重要数字信息,以双定性双定量相似度法评价附子理中丸批间质量稳定。结论所建立HPLC数字化指纹图谱具有较好的精密度和重现性,适用于附子理中丸的质量控制。
