Making Yoghurt

Descripción

GCSE (B6) Biology Mapa Mental sobre Making Yoghurt, creado por alice.finlay el 23/03/2014.
alice.finlay
Mapa Mental por alice.finlay, actualizado hace más de 1 año
alice.finlay
Creado por alice.finlay hace más de 10 años
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Resumen del Recurso

Making Yoghurt
  1. Useful bacteria used to make
    1. CHEESE
      1. YOGHURT
        1. VINEGAR
          1. COMPOST
            1. SILAGE
            2. Main stages of making yoghurt
              1. 1. Sterilise all equipment
                1. 2. Milk is pasteurised (heated then cooled)
                  1. 3. Bacterial culture added and incubated at 47 degrees celcius
                    1. 4. Collect samples and test readiness
                      1. 5. Flavours and colours added ready for packaging
              2. LACTOBACILLUS is the name given to the bacteria used to make yoghurt
                1. How is bacteria used to make yoghurt?
                  1. Lactobacillus breaks down lactose in milk.
                    1. These then produce lactic acid, lowering the pH and making it more acidic
                      1. Lactic acid produced thickens yoghurt - This is why it is no longer runny
                  2. pH of milk against time
                    1. pH decreases over time

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