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A diagrammatic kinetic theory of density fluctuations in simple dense liquidsat long times, described in the preceding paper, is applied to a high densityLennard-Jones liquid to calculate various equilibrium time correlationfunctions. The calculation starts from the general theory and makes twoapproximations. 1. The general diagrammatic expression for an irreduciblememory kernel is approximated using a one-loop approximation. 2. Thegeneralized Enskog projected propagator, which is required for the calculation,is approximated using a simple kinetic model for the hard sphere memoryfunction. The coherent intermediate scattering function (CISF), thelongitudinal current correlation function (LCCF), the transverse currentcorrelation function (TCCF), the incoherent intermediate scattering function(IISF), and the incoherent longitudinal current correlation function (ILCCF)are calculated and compared with simulation results for the Lennard-Jonesliquid at high density. The approximate theoretical results are in goodagreement with the simulation data for the IISF for all wave vectors studiedand for the CISF and LCCF for large wave vector. The approximate results are inpoor agreement with the simulation data for the CISF, LCCF, and TCCF for smallwave vectors because these functions are strongly affected by hydrodynamicfluctuations at small wave vector that are not well described by the simplekinetic model used. The possible implications of this approach for the study ofliquids is discussed.

A Diagrammatic Kinetic Theory of Density Fluctuations in Simple Liquids in the Overdamped Limit. II. The One-Loop Approximation