Zymology, also known as zymurgy, is an

applied science Applied science is the application of the scientific method and scientific knowledge to attain practical goals. It includes a broad range of disciplines, such as engineering and medicine. Applied science is often contrasted with basic science, ...

that studies the biochemical process of

fermentation Fermentation is a type of anaerobic metabolism which harnesses the redox potential of the reactants to make adenosine triphosphate (ATP) and organic end products. Organic molecules, such as glucose or other sugars, are catabolized and reduce ...

and its practical uses. Common topics include the selection of fermenting

yeast Yeasts are eukaryotic, single-celled microorganisms classified as members of the fungus kingdom (biology), kingdom. The first yeast originated hundreds of millions of years ago, and at least 1,500 species are currently recognized. They are est ...

and

bacteria Bacteria (; : bacterium) are ubiquitous, mostly free-living organisms often consisting of one Cell (biology), biological cell. They constitute a large domain (biology), domain of Prokaryote, prokaryotic microorganisms. Typically a few micr ...

species and their use in

brewing Brewing is the production of beer by steeping a starch source (commonly cereal grains, the most popular of which is barley) in water and #Fermenting, fermenting the resulting sweet liquid with Yeast#Beer, yeast. It may be done in a brewery ...

wine making Winemaking, wine-making, or vinification is the production of wine, starting with the selection of the fruit, its fermentation into alcohol, and the bottling of the finished liquid. The history of wine-making stretches over millennia. There is ...

, fermenting milk, and the making of other

fermented foods In food processing, fermentation is the conversion of carbohydrates to alcohol or organic acids using microorganisms—yeasts or bacteria—without an oxidizing agent being used in the reaction. Fermentation usually implies that the action of mi ...

Fermentation

Fermentation can be simply defined, in the context of brewing, as the conversion of

sugar Sugar is the generic name for sweet-tasting, soluble carbohydrates, many of which are used in food. Simple sugars, also called monosaccharides, include glucose Glucose is a sugar with the Chemical formula#Molecular formula, molecul ...

molecules into

ethanol Ethanol (also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound with the chemical formula . It is an Alcohol (chemistry), alcohol, with its formula also written as , or EtOH, where Et is the ps ...

and

carbon dioxide Carbon dioxide is a chemical compound with the chemical formula . It is made up of molecules that each have one carbon atom covalent bond, covalently double bonded to two oxygen atoms. It is found in a gas state at room temperature and at norma ...

. : Fermentation practices have led to the discovery of ample microbial and antimicrobial cultures on fermented foods and products.

History

French French may refer to: * Something of, from, or related to France ** French language, which originated in France ** French people, a nation and ethnic group ** French cuisine, cooking traditions and practices Arts and media * The French (band), ...

chemist

Louis Pasteur Louis Pasteur (, ; 27 December 1822 – 28 September 1895) was a French chemist, pharmacist, and microbiologist renowned for his discoveries of the principles of vaccination, Fermentation, microbial fermentation, and pasteurization, the la ...

was the first 'zymologist' when in 1857 he connected yeast to fermentation. Pasteur originally defined fermentation as "respiration without air". Pasteur performed careful research and concluded: The

German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...

Eduard Buchner Eduard Buchner (; 20 May 1860 – 13 August 1917) was a German chemist and Zymurgy, zymologist, awarded the 1907 Nobel Prize in Chemistry for his work on fermentation (biochemistry), fermentation. Biography Early years Buchner was born in Mun ...

, winner of the 1907

Nobel Prize The Nobel Prizes ( ; ; ) are awards administered by the Nobel Foundation and granted in accordance with the principle of "for the greatest benefit to humankind". The prizes were first awarded in 1901, marking the fifth anniversary of Alfred N ...

in chemistry, later determined that fermentation was actually caused by a yeast secretion, which he termed '

zymase Zymase (also known as alcoholase) is an obsolete term for an enzyme complex that catalyzes the fermentation of sugar into ethanol and carbon dioxide. It occurs naturally in yeasts. Zymase activity varies among yeast strains. Zymase is also the ...

'. The research efforts undertaken by the Danish

Carlsberg Carlsberg may refer to: Places * Carlsberg (district), a district in Copenhagen, Denmark ** Carlsberg station, its train station * Carlsberg, Germany, a municipality in Rhineland-Palatinate, Germany * Carlsberg Fjord, Greenland Other uses * Carlsbe ...

scientists greatly accelerated understanding of yeast and brewing. The Carlsberg scientists are generally acknowledged as having jump-started the entire field of

molecular biology Molecular biology is a branch of biology that seeks to understand the molecule, molecular basis of biological activity in and between Cell (biology), cells, including biomolecule, biomolecular synthesis, modification, mechanisms, and interactio ...

Products

* All

alcoholic drink Drinks containing alcohol (drug), alcohol are typically divided into three classes—beers, wines, and Distilled beverage, spirits—with alcohol content typically between 3% and 50%. Drinks with less than 0.5% are sometimes considered Non-al ...

s including

beer Beer is an alcoholic beverage produced by the brewing and fermentation of starches from cereal grain—most commonly malted barley, although wheat, maize (corn), rice, and oats are also used. The grain is mashed to convert starch in the ...

cider Cider ( ) is an alcoholic beverage made from the Fermented drink, fermented Apple juice, juice of apples. Cider is widely available in the United Kingdom (particularly in the West Country) and Ireland. The United Kingdom has the world's highest ...

kombucha Kombucha (also tea mushroom, tea fungus, or Manchurian mushroom when referring to the Microbiological culture, culture; Latin name ''Medusomyces gisevii'') is a fermented beverage, fermented, effervescent, Sweetened beverage, sweetened black ...

kvass Kvass is a fermented, cereal-based, low-alcoholic beverage of cloudy appearance and sweet-sour taste. Kvass originates from northeastern Europe, where grain production was considered insufficient for beer to become a daily drink. The first wr ...

mead Mead (), also called honey wine, and hydromel (particularly when low in alcohol content), is an alcoholic beverage made by fermenting honey mixed with water, and sometimes with added ingredients such as fruits, spices, grains, or hops. The alco ...

perry Perry or pear cider is an alcoholic beverage made from fermented pears, traditionally in England (particularly Gloucestershire, Herefordshire, and Worcestershire), parts of South Wales, France (especially Normandy and Anjou), Canada, Austral ...

tibicos Tibicos, or water kefir, is a traditional fermented drink made with water and water kefir grains held in a polysaccharide biofilm matrix created by the bacteria. It is sometimes consumed as an alternative to milk-based probiotic drinks or tea-c ...

wine Wine is an alcoholic drink made from Fermentation in winemaking, fermented fruit. Yeast in winemaking, Yeast consumes the sugar in the fruit and converts it to ethanol and carbon dioxide, releasing heat in the process. Wine is most often made f ...

pulque Pulque (; ), occasionally known as octli or agave wine, is an alcoholic beverage made from the fermented sap of the maguey (agave) plant. It is traditional in central Mexico, where it has been produced for millennia. It has the color of milk, ...

hard liquor Liquor ( , sometimes hard liquor), spirits, distilled spirits, or spiritous liquor are alcoholic drinks produced by the distillation of grains, fruits, vegetables, or sugar that have already gone through alcoholic fermentation. While the w ...

s (

brandy Brandy is a liquor produced by distilling wine. Brandy generally contains 35–60% alcohol by volume (70–120 US proof) and is typically consumed as an after-dinner digestif. Some brandies are aged in wooden casks. Others are coloured ...

rum Rum is a liquor made by fermenting and then distilling sugarcane molasses or sugarcane juice. The distillate, a clear liquid, is often aged in barrels of oak. Rum originated in the Caribbean in the 17th century, but today it is produced i ...

vodka Vodka ( ; is a clear distilled beverage, distilled alcoholic beverage. Its varieties originated in Poland and Russia. Vodka is composed mainly of water and ethanol but sometimes with traces of impurities and flavourings. Traditionally, it is ...

sake Sake, , or saki, also referred to as Japanese rice wine, is an alcoholic beverage of Japanese origin made by fermenting rice that has been polished to remove the bran. Despite the name ''Japanese rice wine'', sake, and indeed any East Asi ...

schnapps Schnapps ( or ) or schnaps is a type of alcoholic beverage that may take several forms, including distilled fruit brandies, herbal liqueurs, infusions, and "flavored liqueurs" made by adding fruit syrups, spices, or artificial flavorings to ...

), and soured by-products including vinegar and alegar *

Yeast Yeasts are eukaryotic, single-celled microorganisms classified as members of the fungus kingdom (biology), kingdom. The first yeast originated hundreds of millions of years ago, and at least 1,500 species are currently recognized. They are est ...

leavened

bread Bread is a baked food product made from water, flour, and often yeast. It is a staple food across the world, particularly in Europe and the Middle East. Throughout recorded history and around the world, it has been an important part of many cu ...

s including

sourdough Sourdough is a type of bread that uses the fermentation by naturally occurring yeast and lactobacillus bacteria to raise the dough. In addition to leavening the bread, the fermentation process produces lactic acid, which gives the bread its dis ...

salt-rising bread Salt-rising (or salt-risen) bread is a dense white bread that is traditional in the Appalachian Mountains, leavened by naturally occurring wild bacteria rather than by yeast.Bardwell, G., Brown, S. R. (2016) ''Salt Rising Bread: Recipes and Heart ...

, and others *

Cheese Cheese is a type of dairy product produced in a range of flavors, textures, and forms by coagulation of the milk protein casein. It comprises proteins and fat from milk (usually the milk of cows, buffalo, goats or sheep). During prod ...

and some dairy products including

kefir Kefir ( ; alternative spellings: kephir or kefier; ; ; ) is a Fermented milk products, fermented milk drink similar to a thin yogurt or ayran that is made from kefir grains, a specific type of mesophilic SCOBY, symbiotic culture. It is prep ...

and

yogurt Yogurt (; , from , ; also spelled yoghurt, yogourt or yoghourt) is a food produced by bacterial Fermentation (food), fermentation of milk. Fermentation of sugars in the milk by these bacteria produces lactic acid, which acts on milk protein to ...

Chocolate Chocolate is a food made from roasted and ground cocoa beans that can be a liquid, solid, or paste, either by itself or to flavoring, flavor other foods. Cocoa beans are the processed seeds of the cacao tree (''Theobroma cacao''); unprocesse ...

Coffee Coffee is a beverage brewed from roasted, ground coffee beans. Darkly colored, bitter, and slightly acidic, coffee has a stimulating effect on humans, primarily due to its caffeine content, but decaffeinated coffee is also commercially a ...

* Dishes including

fermented fish Fermented fish is a traditional preservation of fish. Before refrigeration, canning and other modern preservation techniques became available, fermenting was an important preservation method. Fish rapidly spoils, or goes rotten, unless some method ...

, such as

garum Garum is a fermentation (food), fermented fish sauce that was used as a condiment in the cuisines of Phoenicia, Ancient Greek cuisine, ancient Greece, Ancient Roman cuisine, Rome, Carthage and later Byzantine cuisine, Byzantium. Liquamen is a si ...

surströmming (; ) is Brining, lightly salted, Fermentation in food processing, fermented Baltic Sea herring traditional to Swedish cuisine since at least the 16th century. It is distinct from fried or pickled herring. The Baltic herring, known as in Swedis ...

, and

Worcestershire sauce Worcestershire sauce or Worcester sauce (UK: ) is a fermented liquid condiment invented by pharmacists John Wheeley Lea and William Henry Perrins in the city of Worcester in Worcestershire, England, during the first half of the 19th century ...

* Some vegetables such as

kimchi Kimchi (; ) is a traditional Korean side dish (''banchan'') consisting of salted and fermented vegetables, most often napa cabbage or Korean radish. A wide selection of seasonings are used, including '' gochugaru'' (Korean chili powder), ...

, some types of

pickles Pickle, pickled or Pickles may refer to: Food * Pickle, a food that has undergone pickling * Pickled cucumber * Pickle, a sweet, vinegary pickled chutney popular in Britain, such as Branston Pickle, also known as "sweet pickle" or "ploughman's ...

(most are not fermented though), and

sauerkraut Sauerkraut (; , ) is finely cut raw cabbage that has been fermented by various lactic acid bacteria. It has a long shelf life and a distinctive sour flavor, both of which result from the lactic acid formed when the bacteria ferment the sugar ...

* A wide variety of fermented foods made from soybeans, including

fermented bean paste Fermented bean paste is a category of fermented foods typically made from ground soybeans, which are indigenous to the cuisines of East, South and Southeast Asia. In some cases, such as the production of '' miso'', other varieties of beans, such ...

nattō is a traditional Japanese cuisine, Japanese food made from whole soybeans that have been Fermentation in food processing, fermented with Bacillus subtilis, ''Bacillus subtilis'' var. ''natto''. It is often served as a breakfast food with rice. ...

tempeh Tempe or tempeh (; , ) is a traditional Indonesian food made from fermented soybeans. It is made by a natural culturing and controlled fermentation process that binds soybeans into a cake form. A fungus, '' Rhizopus oligosporus'' or '' Rhizopu ...

, and

soya sauce Soy sauce (sometimes called soya sauce in British English) is a liquid condiment of Chinese origin, traditionally made from a fermented paste of soybeans, roasted grain, brine, and ''Aspergillus oryzae'' or '' Aspergillus sojae'' molds. It is r ...

Notes

References

Sources

* *

External links

* Winemaking
Fundamentals of winemaking: zymology
{{Portal bar, Science, Food, Wine Biochemistry Brewing Oenology