Abundances in Planetary Nebulae An Autopsy of Low and Intermediate Mass   Stars
  In this work I report on the results of synthetic thermally pulsing asymptotic giant branch models (TP-AGB) and compare the results to the abundance ratios in a sample of planetary nebulae. I use updated input parameters for mass-loss, the stellar luminosity, and dredge-up. I calculated models with masses between 0.8 solar masses and 8.0 solar masses. I also calculated models with [Fe/H] between -2.5 and 0.3. The effects of the first, second, third dredge-ups and hot-bottom burning are reported on. Models of the planetary nebula in M15 are reported on. The analysis of samples of Galactic bulge and disk nebulae are also reported. 
James F. Buell