.TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourMassFraction_dTxin .TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourMassFraction_dTxinpartial function vapourMassFraction_dTxin = TILMedia.BaseClasses.PartialVLEFluidFunctionPrototypes.vapourMassFraction_dTxin;