Chemical preservation of food Flashcards
What are the traditional processes of food fermentation
Traditional processes
Fermentation, salting, drying
What are the original fradulent and dangerous practices in the food industry?
Watering down milk
Adding cyanide to wines
Give a recent example of adulteration
Addition of alanine to rapeseed oil which led to the death of 700 people
What are the allowed
Antimocriobial preservitives in food
Lactic acid, Sulphur dioxide, lysozyme
What are the
Desired properties of antimicrobial preservitives?
Water soluble
Do not impact taste
Non toxic
What types of organism do ___ affect
SO2 sulphites
Afects yeasts, moulds and bacteria
What are the
Concerns of chemical preservitives
Disguise faulty processing
Harmful chemicals
Acceptable usage of chemical preservitives
Precaution due to Pathogens present within raw materials
Usage of sulphates in preservatives
- Antioxidant
- Inhibits browning reactions
- Reducing agent
- Antimicrobial
What other chemical is nitrate used in conjunction with?
Sodium chloride
What are the main targets of nitrites as a preservative?
Inhibit growth of clostridium botulinum via interupting production of acetyl coa
What types of foods are nitrites used to preserve?
Cured meats, such as bacons and hams
What is the allowed range of nitrites allowed in foods in the uk?
175mg
