1. Introduction
2. The Disk Sample
2.1. Selection Criteria
2.2. Star and Disk Properties Affecting Disk Chemistry
3. Observations
3.1. Spectral Setups
3.2. Data Acquisition and Calibration
4. Results and Simple Analysis
5. Discussion
5.1. Detection Rates and Comparison with Previous Studies
5.2. T Tauri vs. Herbig Ae Stars
5.3. CN and HCN
5.4. Cold Chemistry Tracers
6. Conclusions