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In biochemistry, denaturation is a process in which proteins or nucleic acids lose folded structure present in their native state due to various factors, including application of some external stress or compound, such as a strong acid or base, a concentrated inorganic salt, an organic solvent (e.g., alcohol or chloroform), agitation and radiation, or heat. [3]
Milk skin or lactoderm refers to a sticky film of protein that forms on top of dairy milk and foods containing dairy milk (such as hot chocolate and some soups). Milk film can be produced both through conventional boiling and by microwaving the liquid, and as such can often be observed when heating milk for use in drinks such as drinking ...
But misconceptions about whey protein abound. “Do not fear whey or think of it as only being for ... you’d be getting from protein-rich foods like salmon (omega-3s), beef (iron and b vitamins ...
For example, spray drying after membrane filtration separates the proteins from whey. [8] Heat denatures whey proteins, causing them to coagulate into a protein gel that may be useful in some foods. Sustained high temperatures above 72 °C can denature whey proteins. [7] Heat-denatured whey can still cause allergies in some people. [9]
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This type of whey does not contain glycomacropeptide, which is formed only after the addition of rennet. [15] [16] [17] There is evidence that whey protein is more bio-available than casein or soy protein. [18] [19] Whey protein is commonly marketed as a dietary supplement, typically sold in powdered form for mixing into beverages. [2]
Scalded milk is used in yogurt to make the proteins unfold, [7] and to make sure that all organisms that could outcompete the yogurt culture's bacteria are killed. In traditional yogurt making, as done in the Eastern Mediterranean and Near East, the milk is often heated in flat pans until reduced to about half.
Protein occurs in a wide range of food. [11] [12] On a worldwide basis, plant protein foods contribute over 60% of the per capita supply of protein. [9] In North America, animal-derived foods contribute about 70% of protein sources. [12] Insects are a source of protein in many parts of the world. [13]