224 pages | 56 B/W Illus.
Introduction to the Physical Chemistry of Foods provides an easy-to-understand text that encompasses the basic principles of physical chemistry and their relationship to foods and their processing. Based on the author’s years of teaching and research experience in the physical chemistry of food, this book offers the necessary depth of information and mathematical bases presented in a clear manner for individuals with minimal physical chemistry background.
The text begins with basic physical chemistry concepts, building a foundation of knowledge so readers can then grasp the physical chemistry of food, including processes such as crystallization, melting, distillation, blanching, and homogenization as well as rheology and emulsion and foam stability. The chapters cover thermodynamic systems, temperature, and ideal gases versus real gases; chemical thermodynamics and the behavior of liquids and solids, along with phase transitions; and the thermodynamics of small molecule and macromolecule dispersions and solutions.
The text describes surface activity, interfaces, and adsorption of molecules. Attention is paid to surface active materials, with a focus on self-assembled and colloidal structures. Emulsions and foams are covered in a separate chapter. The book also introduces some of the main macroscopic manifestations of colloidal (and other) interactions in terms of rheology. Finally, the author describes chemical kinetics, including enzyme kinetics, which is vital to food science. This book provides a concise, readable account of the physical chemistry of foods, from basic thermodynamics to a range of applied topics, for students, scientists, and engineers with an interest in food science.
The physical basis of chemistry
Deviations from ideal behavior: Compressibility
A step beyond temperature
Application of phase transitions: Melting, solidifying, and crystallization of fats
The thermodynamics of solutions
From ideal gases to ideal solutions
Chemical equilibrium in solutions
Ideal solutions: The chemical potential approach
Depression of the freezing point and elevation of the boiling point
Polarity and dipole moment
Real solutions: Activity and ionic strength
On pH: Acids, bases, and buffer solutions
Macromolecules in solution
Enter a polymer
Is it necessary to study macromolecules in food and biological systems in general?
Flory–Huggins theory of polymer solutions
Osmotic pressure of solutions of macromolecules
Concentrated polymer solutions
Geometry of the liquid surface: Capillary effects
Definition of the interface
What are they, and where are they found?
Hydrophilic-lipophilic balance (HLB), critical micelle concentration (cmc), and Krafft point
Deviations from the spherical micelle
The thermodynamics of self-assembly
Structures resulting from self-assembly
Self-assembly of macromolecules: The example of proteins
Emulsions and foams
A brief guide to atom-scale interactions
Light scattering from colloids
Destabilization of emulsions and foams
Does everything flow?
Elastic behavior: Hooke’s law
Viscous behavior: Newtonian flow
Complex rheological behaviors
How does a gel flow? (Viscoelasticity)
Methods for determining viscoelasticity
Elements of chemical kinetics
Diamonds are forever?
Second- and higher-order reactions
Dependence of velocity on temperature
The kinetics of enzymic reactions