Hurdles Technology Flashcards
Hurdles technology developed by ..in year…
L Leistner
MB
Uplc: 1973
Hplc: 2004
Pcr:1986
Sers: 1974
…1989
Hurdles: 1995
?
Hurdles technology aldo called as barrier tech, combined processes, combination preservation tech
True
Combjned processe because
It combines principles of different microbial GROWTH FACTORS
Lowering pH and lowering refox potential are….hurdle ( physical /physiochemical)
Physiochemical
Maillard reaction and spices or herbs are…..phys/ physiochemical
Physiochemical
Reducing water activity
Physiochemical
Extrusion, magnetic field, ionising radiation, ultra high pressure, ultra sonisation, uv,
Aseptic packaging
Modified atmospheric package
Are
Physical
Photo dynamic inactivation is
Physical
Physical hurdles include
Aseptic
MA
High temp- blanching, pasteurisation, sterilisation, evaporation, EXTRUSION, baking, frying
Electromagnetic energy- microwave, radio frequencies, pulsed magnetic field, high electric field
Ionising radiation
Uv
Temperature
Packaging film
Photo dynamic inactivation
Ultra high pressure
Ultra sonisation
Physiochemical hurdles include
Maillard reaction
Spices and herbs
Refucing wa
Reducing pH
Reducing redox potential
Surface treatment agents
Co2
Oxygen and ozone
Ethanol
Lactic acid
Lavtic peroxidase
Irganic acid
Phenols
Phosphates
SALT
nitrate and nitrite
Sulphite of Na and K
Microbial derived hurdles
Bacteriocins
Antibiotics
Competitive flora
Protective culture
Hurdle tech is important
No single preservation tech can destroy all type of mo at once
True
Using hurdle tech canhrlp keep each preservative conc used, ..low/ high
Low
Nutrient rich food needs ..higher / lower hurdles
Higher
