Cool Stars 14 - Submitted Abstract # 77 This version created on 05 October 2006 Abundances in Bulge, Disk and Halo Stars Jorge Melendez, Australian National University Martin Asplund, Australian National University Michael S. Bessell, Australian National University Ken C. Freeman, Australian National University Katia Cunha, NOAO and Observatorio Nacional Verne V. Smith, NOAO Beatriz Barbuy, Universidade de Sao Paulo We present the first results of a homogeneous study of C, N, O, Ti, Fe and Ni abundances in Bulge, Disk and Halo giants. Our study is based on high resolution (R = 50 000) infrared spectra taken with Phoenix at Gemini South. We show that, like in Halo stars, O and Ti are enhanced in Bulge stars, but the [O/Fe] ratios decrease with increasing [Fe/H]. The simultaneous observation of CN, CO and OH lines, allow us to take into account molecular equilibrium in a consistent way, determining thus more precise C, N and O abundances. The oxygen abundance of solar-metallicity thin disk giants will be compared with the solar oxygen abundance. ----------------------------------