Fundamentals of Water Holding Capacity (WHC) of Meat

Table of Contents

1. Introduction
   1. Objectives
   2. Learning goals
   3. Teacher page
2. List of Abbreviations used in this Learning Resource
3. Section I: Introduction and Significance of WHC
   1. What is WHC?
   2. Overview of Proteins, Fat, pH and Water and WHC
   3. Compartments for Holding Water in Meat
   4. Activity - Section I
4. Section II: Major Factors Affecting WHC
   1. Role of Animal Genetics and WHC
   2. Role of Pre-harvest Handling of Pigs on WHC
   3. Conversion of Muscle-to-Meat Issues and WHC
   4. Muscle Extensibility and Rigor Mortis
   5. Activity - Section II
5. Section III: Mechanism for Holding of Water in Pork
   1. Concepts for holding of Water in Meat
   2. How is Water Held in Meat?
   3. Graphic Representation of WHC and Important Concepts
   4. Examples of Extrinsic Factors Affecting WHC of Processed Meats
   5. Activity - Section III
6. Section IV: Fundamental Science of Water Holding Capacity
   1. Expanding the Knowledge of WHC
   2. The Assignment
   3. Activity - Section IV
7. Section V: Methods for Determining WHC
   1. Complexity of Measuring WHC
   2. What Moisture Categories of Water need to be Measured?
   3. Video: Great Visualization of four WHC Methods
   4. Methods for Measuring WHC of Meat
   5. Activity - Section V
8. Section VI: Recent Advances in Measuring & Monitoring WHC
   1. Need for Fast, Real-time, Non-destructive WHC Methods
   2. Potential Fast and Non-destructive Methods
   3. Activity - Section VI
9. Selected References related to WHC
10. References: Q-Pork Chain & Other Instrumental Methodology for WHC
11. Completion
    1. Comments
    2. Self assessment
    3. Evaluation
12. Acknowledgement

Activity - Section II

Self- or group-study questions: (Answers at the end)

1. True/False: Longer sarcomeres have lower WHC than short sarcomeres.
2. Muscles with shorter sarcomeres have _________(more/less) space for water entrapment.
3. If there are more negative electrostatic charges on sarcomere myofilaments, the spacing between the proteins molecules will ____________ (increase or decrease).
4. True/False: The net charge on sarcomere myofilaments increases as pH increases.
5. What do PSE and DFD represent?
6. How can animal genetics affect WHC?
7. As muscle is converted into meat, normally the pH declines to about _______ (give a range).
8. How can post-mortem chilling affect WHC?
9. Why is a rapid drop in muscle pH while the carcass temperature is still high so undesirable?