Year 11 Food Technology - Role of Food Properties

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2. Identify and discuss the role of the food properties 3. Identify and discuss the factors which affect the specific properties of the dish Gelatinisation Gelatinisation is the process where starch grains are mixed with a liquid and are heated. When enough heat is applied the starch granules begin to absorb the moisture and they start swelling, bumping into each other and bursting to release starch molecules into the liquid. The liquid starts to thicken when the starch is close to boiling point. Heating needs to be continued in order to allow all the starch grains to fully gelatinise. The starch needs sufficient liquid in order for the starch granules to swell up. Once the starchy substances are heated, a gel is then formed. The main factors contributing to gelatinisation is the type of starch, temperature, addition of other ingredients, starch to liquid and the timing of the addition of other ingredients. Out of these five, temperature and starch to liquid are the most obvious factor found in the recipe Honey chicken stir fry. The ingredient that gelatinisation occur was in the hokkien noddles. Gelatinisation can only occur when certain factor have been applied. The first of these is the temperature of the certain ingredient. The temperature determines the rate of gelatinisation, as the speed of heat affects the speed of gelatinisation, the closer to boiling point the faster the starch granules begin to absorb the moisture and therefore increases the likeliness of the starch grains to start swelling, bumping into each other and bursting, releasing starch molecules into the liquid. The example of this is the heating of the hokkien noddles in creating the Honey chicken Stir Fry. The temperature of allowing gelatinisation to occur had to high enough to ensure that the mixture will simmer; in order for the hokkien noddles to reach gelatinisation

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