Table of Contents: Preface Exact Treatment of Finite Rank Modifications of Finite-Dimensional and Infinite-Dimensional Quantum Systems, pp. 1-151 (Tomislav P. Živkoviæ, Ruðer Boškoviæ Institute, Zagreb, Croatia) Molecular Symmetry and Fuzzy Symmetry, pp. 153-246 (Xuezhuang Zhao, Department of Chemistry, Nankai University, Tianjin, P.R.China) Information Perspective on Molecular Electronic Structure, pp. 247-325 (Roman F. Nalewajski, Faculty of Chemistry, Jagiellonian University, Cracow, Poland) The Chemistry and Mathematics of DNA Polyhedra, pp. 327-366 (Wen-Yuan Qiu, Ze Wang, Guang Hu, State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou, People’s Republic of China) High-Gain Observers for Estimation of Kinetics in Batch and Continuous Bioreactors, pp. 367-416 (Dan Seliºteanu, Emil Petre, Dorin ªendrescu, Monica Roman, Department of Automatic Control, University of Craiova, Craiova, Romania) Remarks on Novel Exact Solution Methodologies in Wavefunction