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Chymosin, its key component, is a protease enzyme that curdles the casein in milk. In addition to chymosin, rennet contains other enzymes, such as pepsin and a lipase. Rennet has traditionally been used to separate milk into solid curds and liquid whey, used in the production of cheeses.
Milk is skimmed to remove the fat, then the milk is soured so that the casein is precipitated as milk curd. The curd is washed (removing the whey), and then the curd is pressed to squeeze out the water (it may even be dried to a powder). The casein is mixed with alkali (usually both sodium and calcium hydroxide) to make glue.
A curd knife is used to cut milk curd into small cubes A pan of curdled milk. In curdling, the pH of the milk decreases and becomes more acidic. [1] Independently floating casein molecules attract one another, forming "curdles" that float in a translucent whey. [1]
For over the past 100 years, ginger protease has traditionally been used to curdle milk to create ginger milk curd, a gel-like Cantonese dish made from hot milk and ginger juice. The milk clotting ability and specificity of ginger protease to proteolysis of κ-casein make the enzyme a potential vegetable rennet substitute for cheese production.
A glass of soured milk whey. Whey is the liquid remaining after milk has been curdled and strained. It is a byproduct of the manufacturing of cheese or casein and has several commercial uses. Sweet whey is a byproduct resulting from the manufacture of rennet types of hard cheese, like cheddar or Swiss cheese.
A milk-containing product with a milk fat substitute, produced in accordance with the technology for the production of tvorog, is called not Творог, but a curd product. In some areas of East Germany, quark is served with potatoes and linseed oil as a popular dish, which contains less than 0.5% of animal fats, and hence cholesterol, but ...
Nutrition (Per tbsp): Calories: 60 Fat: 6 g (Saturated Fat: 2 g) Sodium: 90 mg Carbs: 0 g (Fiber: 0 g, Sugar: 0 g) Protein: 0 g. This brand is probably most synonymous with substitute butter, and ...
Curd is obtained by coagulating milk in a sequential process called curdling. It can be a final dairy product or the first stage in cheesemaking . [ 1 ] The coagulation can be caused by adding rennet , a culture , or any edible acidic substance such as lemon juice or vinegar , and then allowing it to coagulate.