Food irradiation Flashcards
What are the 3 types of irradiation?
X-ray
Gamma-ray
Electron-beam
What are the uses of food irradiation?
Sprout inhibition
Kills spores
Decontaminated herbs
Keeps small molecules intact
What are the negatives of food irradiation?
Accumulation of free radicals
Undesirable changes in chemistry
What is the chain reaction of free radicals?
Initiation
Propagation
Termination
What is the initiation process of a free radical chain reaction?
Double bond breaking causing a free radical
What is the propagation process of a free radical chain reaction?
Free radical breaks bond of another atom
What is the termination process of free radical chain reactions?
No more free radicals
What is the SI unit for ionising radiation?
Gray (Gy, J/kg or Ws/kg)
How can absorbed ionising radiation be measured?
Physical, chemical or biochemical dosimetry
What is radappertisation (10-40kGy)?
Food sterilisation with a high radiation dose
What does radappertisation (10-40kGy) kill?
Clostridium botulinum endospores or exotoxins
What is radicidation (2.5-10kGy)?
Food pasteurisation at medium dose
What does radicidation (2.5-10kGy) kill?
Non-spore forming pathogens
What is radurisation (0.75-2.5kGy)?
Beverage and food pasteurisation at low dose
What does radurisation (0.75-2.5kGy) do?
Inhibits sprouting and disinfects pests