Biological Hazards | Food Preservatives | Destruction of Microorganisms | Food Sanitation | Random |
---|---|---|---|---|
prevent cross contamination
prevent microbial growth destruction of microorganisms
3 ways to control biological hazards
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non toxic, heat stable
produced naturally no off flavor/odor
desirable properties or food preservatives
|
145F
165F 160F 145F
what are the minimum internal temperatures of ground meats, poultry, egg dishes and fish
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provide a medium and nutrients for growth
protect pathogens from contact w/chemical sanitizers can reduce effectiveness of sanitizers
why should soils be removed
|
enhance detergency; emulsifying, saponifying and peptizing ability
can damage skin/organs, corrosive
what are advantages and disadvantages to using alkaline cleaning compounds
|
kill them
keep them out keep them from growing
what are the 3 k's
|
pKa & PC
what are the 2 major properties of organic acids that should be considered for use
|
pasteurization- destroys FBP, not spores
sterilization- destroys viable organisms, kills spores
what is the difference between pasteurization and sterilization
|
wetting, saponifying, peptizing, dissolving soluble soils, dispersing insoluble materials, emulsifying, sequestering calcium and magnesium salts
effective cleaning agents for all soil types should have
|
iodophors; 3-5 pH
the most active antimicrobial agents in iodine compounds; most active pH
|
raw ingredients
processing environment
2 major sources of cross contamination
|
bio- natural/controlled microflora
natural- naturally produced antimicrobial agents
what is the difference between biopreservatives and natural preservatives
|
direct- breaks molecular bonds in DNA/RNA, reproductive death in microorganisms
indirect- denaturation of enzymes, cell membrane alter
what are the inactivation modes for irradiation
|
sanitizer efficiency test
sanitizers should produce 99.99% reduction of 75-125 million E.coli and Staph within 30 seconds
what is the chambers test
|
quaternary ammonium compounds
ammonium salts with some or all hydrogen atom substituted by alkyl groups
what are QAC
|
validation and verification of supplier capabilities
use of standard methods for specifications and sampling plans
control measures for high risk ingredients
|
incorporation of specific food additives into packaging to extend shelf life and quality
what is active packaging
|
utilization of high pressure: 200-1000MPa
what is high hydrostatic pressure
|
exposure time, temperature, concentration, surface characteristics, cleanliness, pH, water hardness, microbial type/load
what are physical-chemical factors affecting the effectiveness of sanitizers
|
modified atmospheric packaging- removal/replacement of atmosphere surrounding product before sealing; O2, CO2, CO, N2
what is MAP and what are the common gases used
|
site selection/preparation (water, toxic waste, disposal)
building construction (walls, floors, ceiling, doors) facility design (product flow, personnel moving route)
what are the facility design considerations
|
no, vacuum packaging can allow the growth of anaerobic pathogens so you need to use additional measures (MAP)
what is vacuum packaging, is it the same as MAP
|
utilization of atmospheric plasmas containing high levels of bacteriocidal molecules
what is atmospheric plasma technology
|
FDA
USDA EPA
what government agencies regulate chemical sanitizers
|
reduce water activity, change pH, denature cellular proteins, induces temperature shock, causes metabolic injury in cells
what are the effects of freezing on microbial growth
|