PasteurizationPasteurization or pasteurisation is a process of food preservation in which packaged and non-packaged foods (such as milk and fruit juices) are treated with mild heat, usually to less than , to eliminate pathogens and extend shelf life. The process is intended to destroy or deactivate microorganisms and enzymes that contribute to food spoilage or risk of disease, including vegetative bacteria, but most bacterial spores survive the process.
CattleCattle (Bos taurus) are large, domesticated, bovid ungulates. They are prominent modern members of the subfamily Bovinae and the most widespread species of the genus Bos. Mature female cattle are referred to as cows and mature male cattle are referred to as bulls. Colloquially, young female cattle (heifers), young male cattle (bullocks), and castrated male cattle (steers) are also referred to as "cows". Cattle are commonly raised as livestock for meat (beef or veal, see beef cattle), for milk (see dairy cattle), and for hides, which are used to make leather.
RennetRennet (ˈrɛnᵻt) is a complex set of enzymes produced in the stomachs of ruminant mammals. 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. Rennet from calves has become less common for this use, to the point that less than 5% of cheese in the United States is made using animal rennet today.
AbomasumThe abomasum, also known as the maw, rennet-bag, or reed tripe, is the fourth and final stomach compartment in ruminants. It secretes rennet, which is used in cheese creation. The word abomasum (ab- "away from" + omasum "intestine of an ox") is from Neo-Latin and it was first used in English in 1706. It is possibly from the Gaulish language. The abomasum's normal anatomical location is along the ventral midline. It is a secretory stomach similar in anatomy and function to the monogastric stomach.
Gruyère cheeseGruyère (UKˈɡruːjɛər, USɡruːˈjɛər,_ɡriˈ-, ɡʁɥijɛʁ; Greyerzer) is a hard Swiss cheese that originated in the cantons of Fribourg, Vaud, Neuchâtel, Jura, and Berne in Switzerland. It is named after the town of Gruyères in Fribourg. In 2001, Gruyère gained the appellation d'origine contrôlée (AOC), which became the appellation d'origine protégée (AOP) as of 2013. Gruyère is classified as a Swiss-type or Alpine cheese and is sweet but slightly salty, with a flavour that varies widely with age.
ChymosinChymosin ˈkaɪməsᵻn or rennin ˈrɛnᵻn is a protease found in rennet. It is an aspartic endopeptidase belonging to MEROPS A1 family. It is produced by newborn ruminant animals in the lining of the abomasum to curdle the milk they ingest, allowing a longer residence in the bowels and better absorption. It is widely used in the production of cheese. Historically, chymosin was obtained by extracting it from the stomachs of slaughtered calves. Today, most commercial chymosin used in cheese production is produced recombinantly in , Aspergillus niger var awamori, and .
Cheddar cheeseCheddar cheese (or simply cheddar) is a natural cheese that is relatively hard, off-white (or orange if colourings such as annatto are added), and sometimes sharp-tasting. Cheddar originates from the English village of Cheddar in Somerset. Cheddar cheese is produced all over the world, and cheddar cheese has no protected designation of origin either in the United Kingdom or the European Union.
FondueFondue (UKˈfɒnd(j)uː, USfɒnˈd(j)uː, fɔ̃dy) is a Swiss melted cheese and wine dish served in a communal pot (caquelon or fondue pot) over a portable stove (réchaud) heated with a candle or spirit lamp, and eaten by dipping bread into the cheese using long-stemmed forks. It was promoted as a Swiss national dish by the Swiss Cheese Union (Schweizerische Käseunion) in the 1930s, and was popularized in North America in the 1960s.
CheesemakingCheesemaking (or caseiculture) is the craft of making cheese. The production of cheese, like many other food preservation processes, allows the nutritional and economic value of a food material, in this case milk, to be preserved in concentrated form. Cheesemaking allows the production of the cheese with diverse flavors and consistencies. Cheesemaking is documented in Egyptian tomb drawings and in ancient Greek literature. Cheesemaking may have originated from nomadic herdsmen who stored milk in vessels made from sheep's and goats' stomachs.
CaseinCasein (ˈkeɪsiːn , from Latin caseus "cheese") is a family of related phosphoproteins (αS1, aS2, β, κ) that are commonly found in mammalian milk, comprising about 80% of the proteins in cow's milk and between 20% and 60% of the proteins in human milk. Sheep and Cow milk have a higher casein content than other types of milk with human milk having a particularly low casein content. Casein has a wide variety of uses, from being a major component of cheese, to use as a food additive. The most common form of casein is sodium caseinate.