Home chemical preservation Flashcards
1
Q
What are the 2 underlying principles of chemical preservation?
A
Chemical preservatives create a concentrated solution which dehydrates and kills microbial cells
The acids lower the pH level creating an acidic environment which inhibits microbial growth and inactivates enzymes as they prefer a pH of 7
2
Q
Name three methods of chemical preservation
A
Jam making
Chutney making
Pickling
3
Q
What chemical is used in jam making?
A
Sugar
4
Q
What chemicals are used in chutney making?
A
Sugar and vinegar
5
Q
What chemicals are used in pickling?
A
Brine and vinegar
6
Q
What is the underlying principle of pickling?
A
Brine acts as a preservative as salt dehydrates microbial cells by osmosis causing them to die
