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Deconstruct - What is best way of preparing junket - Coggle Diagram

- - - - Rennet is an enzyme mix that is responsible for curdling milk. It does this by targeting a major protein group called the casein micelle. The casein micelle surrounds droplets of triglycerides and has a component called the kappa casein that is extremely negatively charged to repel other casein micelles, hence keeping the fat emulsified. Rennet's main enzyme is chymosin which cuts the kappa casein away from the rest of the micelle causing it to dissolve into the milk. Thus, resulting in the other components of the casein micelle to bind and coagulate through a process facilitated by calcium phosphate, usually naturally present. If calcium phosphate is not present, it is usually added. This coagulation of protein also causes the fats and minerals to be entrapped within this network of protein, forming the curds/junket (The Courtyard Dairy, 2013).
- - - - The tablets will act by coagulating the milk into curds/junket to cause solidification of milk. The amount of solidification can therefore be used to measure the activity of the Junket tablets. This can be done by letting the junket tablet/s in each trial act on the milk for a fixed amount of time, then extracting the curds and either weighing the remaining liquid or weighing the curds.
        
        Should the curds or the liquid be weighed?
        
        The liquid should be weighed as the curds may adhere significantly to equipment and introduce random error. Although, the remaining liquid will still adhere, it will not adhere as much as the curds.
        
        How many tablets should be used?
        
        The packaging of the brand used (Two Spoons Junket Tablets) show that the junket tablets should be dissolved in 1 tablespoon of water (approximately 14.8 mL) then added to 500 mL of milk. Therefore, all trials should be done in this ratio unless the variable being tested is the amount of Junket Tablets added.