- In brain you have some water in the cells and some out of the cells, it will deconcentrate and it will be greater outside the cell and salt will be bigger in the cell
Video 9 Hot dogs - Usa eats 20 billion hot dogs a year (65 hot dogs per person per year) - Concern is the use of nitrite as a preservative - Its added for taste as well (tangy) - Colour: nitrate affects colour of cured meat - Myoglobin is what makes meat red - Myoglobin reacts with oxygen to become red - Iron get oxidized from iron+2 to iron+3 - Mb(Fe +2 ) reacts with Mb(Fe +2 )0 2 to make Mb(Fe +3 ) - Concerns of nitrates and nitrites in meat - Nitrates get converted into nitrites and then in the body nitrites get converted into nitrosamines (cancer causing chemical) - Nitrates that we take in are natural (fruits) - Packaged hot dogs will contain vitamin C: prevents the conversion of nitrite into chemical nitrosamine - You can have sausages or hot dogs without nitrates: then can be associated with food poisoning, have to keep refrigerated - Celery juice is rich in nitrate Video 10 Mashed potatoes from a box “made with real potatoes” - Ingredients include many antioxidants Oxygen causes: - Browning of fruits and vegetables - Oxidation of fats (rancidity) Anti-oxidants: - Prevent browning and rancidity Open apple has part brown and a little bit not brown - The part that is brown was cut with the knife that reacted with the apple and oxygen to turn the apple brown - Citric acid prevents the metal from reacting (traps the metal ion that will react and causes the food to turn brown) - Chelating agent/sequestrant: stops the metal from reacting Sodium sulphate is an antioxidant: - Prevents food from going brown - Some people are allergic to sulphite - Caused 20 deaths in the USA - Very rarely used now - Used in French fries and grapes - Sulphites has killed one personin canada: from asthma and raisin bread Free radicals promote oxidation - Free radical will pick the hydrogen Liver abnormalities: - Live 25% longer with high diet in BHT Video 11 Bread: - Contains calcium propionate: preservative to prevent ergot - Ergot can cause poisoning - Ergot contains chemical related to LSD - Pont St. Esprit: 1951 died from Ergot
Cheese (swiss cheese): - Has holes - In cheese you have a microorganism Propionibacterium shermanii - Has lactic acid that is converted into CO2 - CO2 creates the holes in swiss cheese - Swiss cheese makes its own preservatives - Propionic acid - In Europe there is no preservatives added because bread isn’t stored for long periods of time Video 12 Gums added to ice cream to prevent ice crystals Radishes: contain goitogrens Cheese: contains tyramine (can cause high blood pressure) Oranges: contain tangeritin (embryo toxic, that can cause birth defect) Celery: contains goitorogens Carrots: contain myristicin (anocinogen, can get high off this) Bananas: contain seratonin (high level lowers sex drive) Apples: contains phlorizin (can cause problems with glucose) Chemicals are present in food - In very small amounts - Like additives, very small amounts - There is no need for food colours to be present
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