Hygiene and control Flashcards
Zoning
Separation of clean and dirty areas
Why should cooling down be done quickly?
Because from 60 degrees and down, spore formers can begin to grow.
What products are in a medium care area?
Products that are heat treated, but are not very vulnerable to be contaminated
What products are in a high care are?
Manually produced products, which are eaten without heating
Counter current flow
When the raw materials come into the factory at the opposite side from where the people come in.
What are hygienic equipments class 1
Can be cleaned without dismantling
What are hygienic equipments class 2
Have to be taken appart before cleaning
What are aseptic equipments?
They are impermeable to MOs
Detergents consist of:
a polar head and a non-polar tail
What is the mechanism of oxidizing disinfectants?
They oxidize the protein synthesis and enzyme systems.
What are the down sides of oxidizing disinfectants?
Bleach is very sensitive to soil, hydrogen peroxide is degrated by catalase
What is the mechanism of alcohols?
Cause membrane leakage
What is the mechanism of aldehydes?
disturbance of the cell and wall leakage
What is the mechanism of phenols?
Disturb enzyme activities
What is the mechanism of quats?
change permeability of cell membrane. Gram (-) develop resistance.
