xix
Unit 7 Unit 7
Working with Complex Food Systems
U n d e r t h e M i c r o s c o p e
Careers in Food Science
Food Quality-Control Inspector . . . . . . . . . . . . . . . . . . . . . 669
Chapter 22 Chapter 22
Mixtures: Solutions, Colloidal Dispersions, and Suspensions . . . . . .670
Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 671
Colloidal Dispersions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 680
Suspensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 690
Experiment 22A: Creating a Water-in-Oil Emulsion . . . . . . . . . . . . . . . . . . . . . . . . . .694
Experiment 22B: Measuring Calories in a Complex Mixture . . . . . . . . . . . . . . . . . . .696
Experiment 22C: Foam Variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .699
Chapter 23 Chapter 23
Separation Techniques: Mechanical and Chemical Methods . . . . . . .702
Mechanical Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 703
Chemical Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 707
Selective Separation Through Barriers . . . . . . . . . . . . . . . . . . . . . . 711
Digestion and Metabolism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 716
Experiment 23A: Filtration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .722
Experiment 23B: Extracting Gelatin and Fat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 724
Experiment 23C: Osmosis and Egg Membranes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 727
Chapter 24 Chapter 24
Research: Developing New Food Products . . . . . . . . . . . . . . . . . . . . .730
Research in the Food Industry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 731
Developing Food Science Experiments . . . . . . . . . . . . . . . . . . . . . . 736
Developing a New Food Product . . . . . . . . . . . . . . . . . . . . . . . . . . . 742
Activity 24A: Developing a Food Science Experiment . . . . . . . . . . . . . . . . . . . . . . . . 750
Activity 24B: Analyzing a Complex Food System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 752
Activity 24C: Developing a New Food Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 755