.TILMedia.BaseClasses.PartialGasObjectFunctions.der_isothermalCompressibility_pTxi .TILMedia.BaseClasses.PartialGasObjectFunctions.der_isothermalCompressibility_pTxipartial function der_isothermalCompressibility_pTxi = TILMedia.BaseClasses.PartialGasObjectFunctionPrototypes.der_isothermalCompressibility_pTxi;