This book discusses: Differential Equation for the Electron Density in Large Molecules, Multipole Expansion Techniques for the Calculation and A Study of the Electrostatic Potential Maps for Several GABA, The Influence of Electrostatic Interactions on the Activity of Lysozyme, Anesthetic Potency and the Perturbation of Positive Ion or Proton, Additivity of the Effects of External Ions and Dipoles upon the Energetics of Proton Transfer, Conformation and Electrostatic Properties Quantum Determination of the New Radioprotector and Anticancer Drug I-102, A Few Considerations on Quinones as Antitumor Agents, An MNDO Molecular Orbital Study of the Reactions of Protonated Oxirane with Simple Nucleophiles, Molecular Orbital Studies on Nucleoside Antibodies VIII, Ab Initio Calculation of Cubic Force Constants in Formamide Monomer, Formamide Dimer, Formic Acid Dimer and Their D, D2 and D4 Derivatives. An Estimation of Fermi Resonance and Intra-Intermolecular Coupling, Quantum Mechanical Study of Putative Intermediates in Adduct Formation by the Suicide Substrate Ethylene with Cytochrome P-450, Inhibition of Glyoxalase I In Vitro by Coumarin and Coumarin Derivatives, Multistep Modeling of Protein Structure: Application to Bungarotoxin, Influence of Local Excitations in DNA Conformation on Binding of Nonintercalating Antitumor Antibiotic in The Minor Groove, Sequence-Specific Recognition of DNA by Lac-Repressor Headpiece.