© 2003 by CRC Press LLC. This chapter provides several tables summarizing spectroscopic properties of various biologically and medically relevant species and samples. It is divided into two main sections: (1) Fundamental Spectroscopic Properties of Biologically and Medically Relevant Molecules and (2) Spectroscopic Data for Biological and Medical Applications. The spectroscopic data for the first section are provided in the following tables: • Table 65.1, Characteristic Raman Frequencies • Table 65.2, Characteristic IR Band Positions of Functional Chemical Groups and Molecules • Table 65.3, Characteristic IR Absorption Frequencies of Compounds • Table 65.4. Characteristics of Electronic Transitions between σ, η, and π Orbitals • Table 65.5, Absorption Characteristics of Common Fluorophores.