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juice : ウィキペディア英語版
juice

Juice is a liquid (drink) that is naturally contained in fruit and vegetables. It can also refer to liquids that are flavored with these or other biological food sources such as meat and seafood. It is commonly consumed as a beverage or used as an ingredient or flavoring in foods. It is also a common practice to mix juices of different fruits/vegetables. Juice did not emerge as a popular beverage choice until the development of pasteurization methods allowed for the preservation of juice without fermentation.〔http://works.bepress.com/cgi/viewcontent.cgi?article=1000&context=ryan_ward〕 The Food and Agriculture Organization of the United Nations (FAO) estimated the total world production of citrus fruit juices to be 12,840,318 tonnes in 2012.〔http://faostat.fao.org/site/567/DesktopDefault.aspx?PageID=567#ancor〕
==Preparation==
Juice is prepared by mechanically squeezing or macerating (sometimes referred to as cold pressed) fruit or vegetable flesh without the application of heat or solvents. For example, orange juice is the liquid extract of the fruit of the orange tree, and tomato juice is the liquid that results from pressing the fruit of the tomato plant. Juice may be prepared in the home from fresh fruit and vegetables using a variety of hand or electric juicers.
Many commercial juices are filtered to remove fiber or pulp, but high-pulp fresh orange juice is a popular beverage.
Common methods for preservation and processing of fruit juices include canning, pasteurization, concentrating, freezing, evaporation and spray drying.
Although processing methods vary between juices, the general processing method of juices includes:〔(【引用サイトリンク】title=Fruit Juice Processing,Fruit Juice Powder Plant,Fruit Juice Processing Plant,Juice Powder Plant )
*Washing and sorting
*Juice extraction
*Straining, filtration and clarification
*Blending pasteurisation
*Filling, sealing and sterilization
*Cooling, labeling and packing.
After the fruits are picked and washed, the juice is extracted by one of two automated methods. In the first method, two metal cups with sharp metal tubes on the bottom cup come together, removing the peel and forcing the flesh of the fruit through the metal tube. The juice of the fruit then escapes through small holes in the tube. The peels can then be used further, and are washed to remove oils, which are reclaimed later for usage. The second method requires the fruits to be cut in half before being subjected to reamers, which extract the juice.〔(【引用サイトリンク】title=How orange juice is made - production process, making, used, processing, product, industry, Raw Materials, The Manufacturing Process of orange juice, Byproducts/Waste, Quality Control )
After the juice is filtered, it may be concentrated, which reduces the size of juice by a factor of 5, making it easier to transport and increasing its expiration date. Juices are concentrated by heating under a vacuum to remove water, and then cooling to around 13 degrees Celsius. About two thirds of the water in a juice is removed.〔 The juice is then later reconstituted, in which the concentrate is mixed with water and other factors to return any lost flavor from the concentrating process. Juices can also be sold in a concentrated state, in which the consumer adds water to the concentrated juice as preparation.〔
Juices are then pasteurized and filled into containers, often while still hot. If the juice is poured into a container while hot, it is cooled as quickly as possible. Packages that cannot stand heat require sterile conditions for filling. Chemicals such as hydrogen peroxide can be used to sterilize containers.〔 Plants can make anywhere from 1 to 20 tonnes a day.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「juice」の詳細全文を読む



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