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  • Title
  • DEDICATION
  • CERTIFICATE
  • DECLARATION
  • ACKNOWLEDGEMENT
  • CONTENTS
  • Preface
  • List of papers published in Journals
  • 1 Periodic Precipitation Patterns: A General Introduction
  • 1.1 Patterns in nature
  • 1.2 Periodic precipitation in reaction-diffusion systems
  • 1.3 The homogeneous A+B-->P type reaction-diffusion processes
  • 1.4 The A+B-->P reaction-diffusion process with initially separated reactants
  • 1.5 The Liesegang patterns
  • 1.6 Characteristic laws of banding
  • 1.6.1 Time law
  • 1.6.2 Spacing law
  • 1.6.3 Width law
  • 1.7 Influences of electrolyte concentrations on banding: Matalon-Packter law
  • 1.8 Role of gel matrix
  • 1.9 Exotic morphological structures
  • 1.10 Propagating patterns
  • 1.11 Gravity effect on the formation of periodic precipitate patterns
  • 1.12 Stabilization effect of electric field on stochastic precipitate pattern formation
  • 1.13 Secondary Liesegang patterns
  • 1.14 Periodic precipitation in multi-component systems
  • 1.15 Conclusions
  • References
  • 2 Theories of Liesegang Phenomena
  • 2.1 Introduction
  • 2.2 Morse and Pierce model
  • 2.3 The Wagner model
  • 2.4 The Prager model
  • 2.5 The Kelley and Rubinow model
  • 2.6 Dew, LeVan & Ross models
  • 2.7 Dhar, Shinohara models
  • 2.8 The Spinodal decomposition scenario
  • 2.9 Conclusions
  • References
  • 3 The Moving Boundary Model: A New Approach
  • 3.1 Introduction
  • 3.2 The moving boundary model
  • 3.3 The new model and the width law
  • 3.4 Conclusions
  • References
  • 4 The Matalon-Packter Law: A Fresh Perspective
  • 4.1 Introduction
  • 4.2 Derivation of Matalon-Packter law
  • 4.3 Numerical study on Matalon-Packter law
  • 4.4 Conclusions
  • References
  • 5 Experimental Verification of the New Model in Different Systems
  • 5.1 Introduction
  • 5.2 Precipitate bands in agar-agar gel
  • 5.2.1 PbF2 patterns
  • 5.2.2 CuCr2O7 bands
  • 5.2.3 PbCO3 bands
  • 5.3 Precipitate bands in silica gel
  • 5.3.1 CuCr2O7 bands
  • 5.3.2 Ca (PO4) 2 bands
  • 5.3.3 SrF2 bands
  • 5.3.4 bamboo bands
  • 5.4 Verification of the laws of patterning
  • 5.4.1 Modified time law
  • 5.4.2 Modified spacing law and determination of new spacing coefficient
  • 5.4.3 En-ΔEn plots and spacing coefficient
  • 5.4.4 Modified width law
  • 5.5 Conclusions
  • References
  • 6 The Role of colloid dynamics
  • 6.1 Introduction
  • 6.2 Estimation of diffusion coefficient
  • 6.3 multi-component systems
  • 6.4 Role of fast colloidal dynamics
  • 6.5 Conclusions
  • References
  • 7 Migrating triplet bands in gelatinous matrix
  • 7.1 Introduction
  • 7.2 Experimental
  • 7.3 The three phases of calcium phosphates
  • 7.4 Propagation of patterns
  • 7.5 Estimation of the spacing coefficient
  • 7.6 Conclusions
  • References
  • 8 Summary and scope for further studies
  • 8.1 Summary
  • 8.2 Scope for further studies
  • References