Pour a glass of beer and the frothy fizz cascade goes up. As more and more small bubbles coalesce, they form a layer of bubbles that tickle the nose.
At first, the bubbling carbonated stream seems endless. But how much foam comes out of a glass of beer before the beer flattens?
Gerard Ligerberea, a professor of chemical physics at the University of Reims Champagne Ardenne in France, previously investigated this effervescent subject in Champagne and calculated that one flute would produce about one million bubbles. Recently, Liger-Belair looked deep into a beer glass and discovered that it produced twice as much foam as champagne. According to a new study, up to 2 million bubbles pop out in a half pint glass.
Relation: When was beer invented?
Archaeological evidence suggests that people have been brewing and drinking beer for at least 5,000 years, and in some cases 13,000 years. Liger-Belair and co-author Clara Cilindre are associate professors and researchers of the Molecular Atmosphere Spectroscopy Group (GSMA). Reported in a study at the University of Reims. This beverage is “by far the most popular alcoholic beverage in the world”, with worldwide production reaching approximately 53 billion gallons (200 billion liters) annually, foam and foam are an important part of the beer experience. Liger-Belair told Live Science. Email. This is especially true for the most popular type of beer, the lager, Liger-Belair said.
“It is for us to bring a little more knowledge about the issue of foam formation, foam size, and finally the total number of foams that can form in a glass of beer along the entire natural degassing process. Seems appropriate, “he said.
Beer is usually malt grain, hops, yeast And water — then fermented.This process fails carbohydrate Produces alcohol, sugar and carbon dioxide (CO2). When beer is bottled or canned, additional CO2 is added and pressure is created inside the container. When the can or bottle seal is broken, the liquid becomes supersaturated with CO2 and the CO2 is released as small bubbles.
In this study, researchers examined beer with 5% alcohol and poured about 8 ounces (250 milliliters) of beer into a 17 ounce (500 ml) glass at a temperature of 42 degrees Fahrenheit (6 degrees Celsius). I got it. Scientists have determined that the total number of beer foam is primarily affected by three factors: the concentration of CO2 in the glass, the amount of foam, and the point at which the beer runs out of CO2 and no foam is formed. Did.
The authors of the study found that small defects in beer glass also helped the liquid produce CO2 bubbles. Dissolved CO2 collects around pits and crevices that are over 1.4 micrometers wide, forming a stream of bubbles. Later, high-speed photography found that as the bubbles rose, the bubbles became larger and more CO2 was captured from the beer. Studies show that drinking a glass of this amount of beer produces a total of 200,000 to 2 million bubbles.
But the study wasn’t just about counting bubbles, scientists said. When the bubbles of the drink pop on the tongue of the drinker, they enhance the subtle taste. By studying effervescence in liquids, scientists can learn how beverages behave under different conditions and how they affect their taste, Liger-Belair said. Said in an email.
The amount of CO2 dissolved in beer is an “important parameter” to understand this, but the shape of the glass that holds the drink also plays an important role. “It’s easy to imagine changing the parameters of beer and glasses to improve the whole thing. It’s a sensory experience,” he said.
“We believe that the beer industry can benefit from increased knowledge of bubble science,” Liger-Belair added.
The findings were published online in the journal on March 31st. ACS Omega..
Originally published in Live Science.
How many bubbles does a glass of beer contain?
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