pasteurization


pasteurization
pasteurization [pas΄chər i zā′shən, pas΄təri zā′shən]
n.
Fr: see PASTEURIZE & -ATION
a method of destroying disease-producing bacteria and checking the activity of fermentative bacteria, as in milk, beer, or cider, by heating the liquid to a prescribed temperature for a specified period of time

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pas·teur·i·za·tion (păs'chər-ĭ-zāʹshən, păs'tər-) n.
1. The act or process of heating a beverage or other food, such as milk or beer, to a specific temperature for a specific period of time in order to kill microorganisms that could cause disease, spoilage, or undesired fermentation.
2. The act or process of destroying most microorganisms in certain foods, such as fish or clam meat, by irradiating them with gamma rays or other radiation to prevent spoilage.
  [After Pasteur, Louis.]

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Partial sterilization of a substance, especially milk or other beverages, by using heat to destroy microorganisms while leaving its chemical makeup unaltered.

The process is named for Louis Pasteur, its originator. Pasteurization of milk requires temperatures of about 145 °F (63 °C) for about 30 minutes, or higher temperatures for shorter periods. The treatment destroys any disease-causing organisms (principally Mycobacterium tuberculosis) as well as organisms that cause spoilage. See also food preservation.

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▪ heating process
      heat-treatment process that destroys pathogenic microorganisms in certain foods and beverages. It is named for the French scientist Louis Pasteur (Pasteur, Louis), who in the 1860s demonstrated that abnormal fermentation of wine and beer could be prevented by heating the beverages to about 57° C (135° F) for a few minutes. Pasteurization of milk, widely practiced in several countries, notably the United States, requires temperatures of about 63° C (145° F) maintained for 30 minutes or, alternatively, heating to a higher temperature, 72° C (162° F), and holding for 15 seconds (and yet higher temperatures for shorter periods of time). The times and temperatures are those determined to be necessary to destroy the Mycobacterium tuberculosis and other more heat-resistant of the non-spore-forming, disease-causing microorganisms found in milk. The treatment also destroys most of the microorganisms that cause spoilage and so prolongs the storage time of food.

      Ultra-high-temperature (UHT) pasteurization involves heating milk or cream to 138°to 150° C (280° to 302° F) for one or two seconds. Packaged in sterile, hermetically sealed containers, UHT milk may be stored without refrigeration for months. Ultrapasteurized milk and cream are heated to at least 138° C for at least two seconds, but because of less stringent packaging they must be refrigerated. Shelf life is extended to 60–90 days. After opening, spoilage times for both UHT and ultrapasteurized products are similar to those of conventionally pasteurized products.

      Pasteurization of some solid foods involves a mild heat treatment, the exact definition of which depends on the food. Radiation pasteurization refers to the application of small amounts of beta or gamma rays to foods to increase their storage time.

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Universalium. 2010.

Look at other dictionaries:

  • Pasteurization — is a process of heating a food, usually liquid, to a specific temperature for a definite length of time, and then cooling it immediately. This process slows microbial growth in food. The process of heating wine for preservation purposes has been… …   Wikipedia

  • Pasteurization — Pas*teur i*za tion, n. A process devised by Pasteur for preventing or checking fermentation in fluids, such as wines, milk, etc., by exposure to a temperature of 140[deg] F., thus destroying the vitality of the contained germs or ferments. [1913… …   The Collaborative International Dictionary of English

  • pasteurization — (Amer.) n. partial sterilization of milk or other fluid through exposure to high temperatures; process of heating liquid (especially milk) to a high temperature in order to destroy harmful bacteria without substantially changing the flavor or… …   English contemporary dictionary

  • pasteurization — [pas΄chər i zā′shən, pas΄təri zā′shən] n. [Fr: see PASTEURIZE & ATION] a method of destroying disease producing bacteria and checking the activity of fermentative bacteria, as in milk, beer, or cider, by heating the liquid to a prescribed… …   English World dictionary

  • Pasteurization — A method of treating food by heating it to a certain point to kill pathogenic (disease causing) organisms but not harm the flavor or quality of the food. Pasteurization is used with beer, milk, fruit juices, cheese and egg products. Named for the …   Medical dictionary

  • pasteurization — pasterizavimas statusas T sritis chemija apibrėžtis Maisto produktų konservavimas kaitinimu normaliame slėgyje 63–100 °C temperatūroje. atitikmenys: angl. pasteurization rus. пастеризация …   Chemijos terminų aiškinamasis žodynas

  • pasteurization — pasterizavimas statusas T sritis ekologija ir aplinkotyra apibrėžtis Maisto produktų konservavimas kaitinant iki 63–95 ºC. Būna ilgas (30 min 65 °C temperatūroje), trumpas (0,5–1 min 72–85 °C temperatūroje), akimirksninis (85–95 °C temperatūroje) …   Ekologijos terminų aiškinamasis žodynas

  • pasteurization — pasterizavimas statusas T sritis Energetika apibrėžtis Maisto produktų konservavimas kaitinant iki (63 95) °C temperatūros. Pasterizavimas būna ilgas (30 min. 65 °C temperatūroje), trumpas (0,5 1 min. (72 85) °C temperatūroje), akimirkinis (85… …   Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas

  • pasteurization — pasteurize (also pasteurise) ► VERB ▪ make (milk or other food) safe to eat by destroying most of the micro organisms in it, especially by heating. DERIVATIVES pasteurization noun. ORIGIN named after the French chemist Louis Pasteur (1822 95) …   English terms dictionary

  • pasteurization — noun Date: 1886 1. partial sterilization of a substance and especially a liquid (as milk) at a temperature and for a period of exposure that destroys objectionable organisms without major chemical alteration of the substance 2. irradiation of… …   New Collegiate Dictionary


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