The modern food industry is hugely important to our society. These practicals focus on how food can be treated to prolong its storage time.
Standard technique Making serial dilutions
Instructions for students, for making a series of dilutions of any substance.
Standard technique Aseptic techniques
Tools covered: wire loop, pipettes, cotton wool plugs.
Procedures covered: inoculating plates, inoculating slopes, inoculating cultures, using a wire loop, using a pipette, flaming necks of bottles and test tubes, and disinfecting surfaces.
Hazards of defrosted food
Estimate the amount of microbial growth in defrosted foodstuffs.
Make microbe cell counts using the Miles and Misra technique.
Standard technique Making a pour plate
A small amount of inoculum from a broth culture grows in a dish of medium. Determine a viable count per cm3 if the dilution produces 30-100 separate countable colonies.