9: MF Processing Flashcards
1
Q
How is magnetic field generated?
A
By passing AC/DC current through a conductor or using a permanent magnet.
2
Q
What are the three types of MF?
A
- Static MF (SMF)
- Oscillating MF (OMF)
- Pulsed MF (PMF)
3
Q
What are the factors affecting the interaction of MF with food?
A
- Physicochemical properties of food: Diff food components, diff atoms and molecules, diff magnetisms.
- Characteristics of MF
4
Q
How does MF affect food enzymes?
A
- MF changes structure and conformation of enzymes which may inhibit or stimulate certain reactions.
5
Q
How does MF affect microorganisms?
A
- MF acts to activate certain cells components or modify its structure or functionality.
- Low freq MF inhibits growth and reproduction of cells
- Low freq, high intensity PMF destroy microbial cell membranes and organelles.
- SMF generates bactericidal free radicals. and modify ethanol-glucose conversion mechanisms, which increases ethanol production.
- OMF changes enzyme activity and limit cell growth
- PMF changes the expression and stability of intracellular protein.