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UNIT-I
Colloidal dispersions: Classification of dispersed systems & their general
characteristics, size & shapes of colloidal particles, classification of colloids &
comparative account of their general properties. Optical, kinetic & electrical properties.
Effect of electrolytes, coacervation, peptization& protective action.
UNIT-II
Rheology: Newtonian systems, law of flow, kinematic viscosity, effect of temperature, non-Newtonian systems, pseudoplastic, dilatant, plastic, thixotropy, thixotropy in
formulation, determination of viscosity, capillary, falling Sphere, rotational viscometers
Deformation of solids: Plastic and elastic deformation, Heckel equation, Stress, Strain,
Elastic Modulus
UNIT-III
Coarse dispersion: Suspension, interfacial properties of suspended particles, settling in
suspensions, formulation of flocculated and deflocculated suspensions. Emulsions and
theories of emulsification, microemulsion and multiple emulsions; Stability of emulsions,
preservation of emulsions, rheological properties of emulsions and emulsion
formulation by HLB method.
UNIT-IV
Micromeretics: Particle size and distribution, mean particle size, number and weight
distribution, particle number, methods for determining particle size by different
methods, counting and separation method, particle shape, specific surface, methods for
determining surface area, permeability, adsorption, derived properties of powders,
porosity, packing arrangement, densities, bulkiness & flow properties.
UNIT-V
Drug stability: Reaction kinetics: zero, pseudo-zero, first & second order, units of basic
rate constants, determination of reaction order. Physical and chemical factors influencing
the chemical degradation of pharmaceutical product: temperature, solvent, ionic strength,
dielectric constant, specific & general acid base catalysis, Simple numerical problems.
Stabilization of medicinal agents against common reactions like hydrolysis & oxidation.
Accelerated stability testing in expiration dating of pharmaceutical dosage forms.
Photolytic degradation and its prevention