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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.
Although cows milk curd also is produced, Buffalo curd is the preferred variety. In Nepal, curd is produced by souring pasteurized milk with natural micro-flora. The pasteurized milk is added to a container called theki carved out of wood like Daar(Boehmeria Rugulosa). The milk is left for 12–16 hours and the micro-organisms entrapped within ...
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]
Casein micelles consist of mainly α(s1)-casein, α(s2)-casein, β-casein, and κ-casein, where hydrophobic α and β-casein are in the inner sub-micelle and hydrophilic κ-casein is in the outer part. When the milk starts curdling, the curds are small, but as coagulation increases, curd size increases until the milk ends up with a tofu-like ...
Camel's milk has supported Bedouin, nomad and pastoral cultures since the domestication of camels millennia ago. Herders may for periods survive solely on the milk when taking the camels on long distances to graze in desert and arid environments. Camel dairy farming is an alternative to cow milk in dry regions of the world. Casein [8]
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.
It comprises proteins and fat from milk (usually the milk of cows, buffalo, goats or sheep). During production, milk is usually acidified and either the enzymes of rennet or bacterial enzymes with similar activity are added to cause the casein to coagulate. The solid curds are then separated from the liquid whey and pressed into finished cheese ...
Rennet contains the enzyme chymosin which converts κ-casein to para-κ-caseinate (the main component of cheese curd, which is a salt of one fragment of the casein) and glycomacropeptide, which is lost in the cheese whey. As the curd is formed, milk fat is trapped in a casein matrix.