A new xanthone, 1,2-dihydro-3,6,8-trihydroxy-1,1-bis (3-methylbut -2-enyl)-5-(1, 1-dimethylprop-2-enyl)xanthen-2,9-dione (1), has been isolated from the aerial part of Hypericum erectum.
Initial values of the quark-gluon plasma system form relativistic nucleusnucleus collisions are discussed under thermodynamic equilibrium.From these initial values,the dependence of the dilepton production on the inci...Initial values of the quark-gluon plasma system form relativistic nucleusnucleus collisions are discussed under thermodynamic equilibrium.From these initial values,the dependence of the dilepton production on the incident energy of colliding nuclei has been studied based on the relativistic hydrodynamic model,and it is found that with increasing incident energy a characterstic plateau indicating the formatioin of the quark-gluon plasma appears in the total yield.展开更多
文摘A new xanthone, 1,2-dihydro-3,6,8-trihydroxy-1,1-bis (3-methylbut -2-enyl)-5-(1, 1-dimethylprop-2-enyl)xanthen-2,9-dione (1), has been isolated from the aerial part of Hypericum erectum.
基金Supported by 95 Key Funds of the Chinese Academy of Sciences(KJ951-A1-410)National foundation of China No.19475060
文摘Initial values of the quark-gluon plasma system form relativistic nucleusnucleus collisions are discussed under thermodynamic equilibrium.From these initial values,the dependence of the dilepton production on the incident energy of colliding nuclei has been studied based on the relativistic hydrodynamic model,and it is found that with increasing incident energy a characterstic plateau indicating the formatioin of the quark-gluon plasma appears in the total yield.
