Mason Delacroix
Alcohol is produced when yeast and sugar combine to make ethanol and carbon dioxide. The process is called fermentation, and it can be done with fruit, fruit juice, grains, and other organic materials with high sugar content. The type of alcohol in alcoholic drinks is called ethanol, and it is made by fermenting the sugars in grains, fruits, or vegetables. For alcoholic drinks, different raw materials are used to create different types of drinks. For example, grain is used to make whiskey or beer, grapes to make wine, apples to make cider, and potatoes to make vodka.
| Characteristics | Values |
|---|---|
| Ingredients | Grains, fruits, or vegetables |
| Process | Fermentation |
| Chemical Reaction | Yeast or bacteria react with the sugars in the other ingredients to produce ethanol (the alcohol in the drink) and carbon dioxide (which can mean the drink has bubbles) |
| Alcohol Unit | 10ml or 8g of pure alcohol |
| Litres Volume (LV) | Total volume of a liquid, irrespective of its alcohol content |
| Litres Pure (LPA) | Measures the volume of pure alcohol in a liquid |
| Alcohol By Volume (ABV) | Measures the amount of pure alcohol as a percentage of the total volume of liquid in a drink |
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What You'll Learn
- Fermentation: grains, fruits, or vegetables are put through a process where yeast or bacteria react with their sugars to produce ethanol and carbon dioxide
- Ethanol: the type of alcohol in alcoholic drinks, ethanol is absorbed into the bloodstream and travels to the brain, causing chemical changes and a depressant effect
- Litres Volume (LV): a measure of the total volume of liquid, irrespective of alcohol content
- Litres Pure (LPA): measures the volume of pure alcohol in a liquid, calculated by multiplying ABV by volume
- Alcohol metabolism: the body breaks down alcohol through the enzyme alcohol dehydrogenase (ADH), with men and women processing alcohol differently
Fermentation: grains, fruits, or vegetables are put through a process where yeast or bacteria react with their sugars to produce ethanol and carbon dioxide
Alcohol is made by putting grains, fruits, or vegetables through a process called fermentation. This process involves yeast or bacteria reacting with the sugars in these ingredients to produce ethanol (the alcohol in the drink) and carbon dioxide (which gives drinks their bubbles). This process is known as ethanol fermentation, or alcoholic fermentation.
Ethanol fermentation is a biological process that converts sugars such as glucose, fructose, and sucrose into ethanol and carbon dioxide. Yeast organisms consume these sugars and produce ethanol and carbon dioxide as waste products. This process can be summarised as the conversion of one mole of glucose into two moles of ethanol and two moles of carbon dioxide, producing two moles of ATP.
During fermentation, the enzyme invertase cleaves the glycosidic linkage between the glucose and fructose molecules. Each glucose molecule is then broken down into two pyruvate molecules in a process known as glycolysis. Finally, pyruvate is converted to ethanol and carbon dioxide in two steps. This reaction is catalysed by alcohol dehydrogenase, which is found in baker's yeast.
Alcoholic fermentation is the primary fermentation process in winemaking. The fermentable sugars in grape juice, mainly glucose and fructose, are transformed into ethanol and carbon dioxide. This process is carried out by the yeast Saccharomyces cerevisiae, which becomes the dominant species during fermentation due to the low pH and high ethanol and sugar concentrations, as well as anaerobic conditions.
In addition to wine, ethanol fermentation is also used in the production of beer, cider, bread, and other alcoholic beverages. It is a simple and energy-efficient process that has potential commercial applications beyond just alcohol production. For example, the cereal unfermented solid residues from the fermentation process can be used as livestock feed or in the production of biogas.
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Ethanol: the type of alcohol in alcoholic drinks, ethanol is absorbed into the bloodstream and travels to the brain, causing chemical changes and a depressant effect
Alcoholic drinks are made through a process called fermentation, where yeast or bacteria react with the sugars in grains, fruits, or vegetables to produce ethanol (the alcohol in the drink) and carbon dioxide (which can cause the drink to have bubbles). Ethanol is also known as a first-generation biofuel and can be made by breaking down corn and wheat using enzymes and living microorganisms.
When you drink alcohol, ethanol molecules are absorbed into your bloodstream through the lining of your stomach. Being small molecules, they travel to virtually all parts of your body, including your brain, in just five minutes. Ethanol causes chemical changes in your brain, suppressing normal activity in the area that controls inhibition. This results in a depressant effect on the brain, which has to readjust as the alcohol is metabolised and broken down by your body.
The effects of alcohol on the brain can vary depending on the amount consumed and the drinker's weight, age, gender, overall health, and drinking habits. With a blood alcohol content (BAC) between 0.01 and 0.05, an individual is in the first stage of intoxication, where their reaction time, behaviour, and judgement may be slightly altered. This stage is often referred to as "tipsy". During the early stages of drinking, the brain releases more dopamine, a chemical linked to pleasure, resulting in feelings of relaxation and confidence. However, reasoning and memory may be slightly impaired.
As BAC levels rise, the effects on the brain become more pronounced. A BAC from 0.08 to 0.25 indicates legal intoxication, with effects on the occipital lobe, temporal lobe, frontal lobe, and parietal lobe. Drinking too much can lead to side effects such as blurred vision, slurred speech, hearing impairment, and loss of fine motor skills. Mood swings, impaired judgement, and nausea or vomiting may also occur.
Consuming excessive amounts of alcohol can lead to dangerous consequences, including alcohol overdose and alcohol poisoning. An alcohol overdose occurs when the bloodstream contains so much alcohol that areas of the brain controlling vital functions like breathing, heart rate, and temperature control begin to shut down. Alcohol poisoning can occur when BAC levels exceed 0.45, potentially causing death or permanent brain damage.
Long-term heavy drinking can also cause structural and functional alterations in the brain, including reductions in neuron size. Adolescent brains are particularly vulnerable to the negative effects of alcohol, with misuse during this stage potentially resulting in long-lasting changes in brain structure and function.
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Litres Volume (LV): a measure of the total volume of liquid, irrespective of alcohol content
When it comes to the production of alcohol, it's important to understand the concept of Litres Volume (LV) and how it relates to the total liquid content, irrespective of alcohol concentration. LV is a standard measure used across various industries, including the spirits business. It simply refers to the total volume of a liquid, without considering the alcohol content.
In the context of alcoholic beverages, LV is particularly relevant when discussing spirits. For instance, when you purchase a bottle of whisky, cognac, bourbon, or tequila, the volume indicated on the bottle represents the total liquid content, including both the alcohol and any other components. This measurement is crucial for consumers to understand how much liquid they are getting, regardless of the alcohol concentration.
Litres Volume (LV) is calculated differently from Litres Pure (LPA). While LV measures the total volume of liquid, LPA specifically measures the volume of pure alcohol within that liquid. LPA is calculated by multiplying the Alcohol By Volume (ABV) percentage by the volume. For example, if you have 100 litres of a spirit with an ABV of 40%, the LPA would be 40 litres.
It's important to distinguish between LV and LPA, especially when it comes to aged spirits. Over time, the ABV of aged spirits can change, which means that the LPA provides a more accurate and consistent measure of the actual alcohol content. This consistency is essential for trading, commerce, and regulatory purposes, as most countries tax alcoholic beverages based on their alcohol content.
In summary, Litres Volume (LV) is a measure of the total volume of liquid in a container, irrespective of alcohol concentration. It is a standard measure used across industries, including for alcoholic beverages, where it helps consumers understand the total liquid content they are purchasing. However, when it comes to understanding the actual alcohol content, Litres Pure (LPA) offers a more precise measure by specifically quantifying the volume of pure alcohol present.
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Litres Pure (LPA): measures the volume of pure alcohol in a liquid, calculated by multiplying ABV by volume
The process of making alcohol involves putting grains, fruits, or vegetables through fermentation, where yeast or bacteria react with the sugars in the ingredients to produce ethanol (alcohol) and carbon dioxide. During fermentation, the sugar in the mixture is converted into alcohol. The amount of sugar present in the initial mixture determines the final alcohol content.
When it comes to measuring the alcohol content in a liquid, the metric used is Litres Pure Alcohol (LPA). LPA measures the volume of pure alcohol in a liquid. This is particularly important in the spirits industry, where accuracy and consistency in measuring alcohol content are crucial for trading, taxation, and other operations.
LPA is calculated by multiplying the Alcohol By Volume (ABV) percentage by the volume of the liquid. For example, if you have 100 litres of a spirit with an ABV of 40%, the LPA would be 40. This calculation provides a consistent measure of the actual alcohol content, irrespective of the total volume.
The concept of LPA becomes even more important when dealing with aged spirits, as the ABV can change over time due to factors like evaporation, known as the "angel's share". For instance, an IBC of 1,000 litres with 65% alcohol may lose 5% of its alcohol content due to evaporation over five years, resulting in 600 litres of pure alcohol remaining.
LPA is also essential for pricing alcoholic beverages. The price of alcohol is often given in litres of pure alcohol, and the conversion between litres and litres of pure alcohol is straightforward. By understanding LPA, businesses can ensure precision, transparency, and compliance in their operations.
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Alcohol metabolism: the body breaks down alcohol through the enzyme alcohol dehydrogenase (ADH), with men and women processing alcohol differently
Alcohol is made by putting grains, fruits, or vegetables through a process called fermentation, which involves yeast or bacteria reacting with the sugars in the other ingredients to produce ethanol (the alcohol in the drink) and carbon dioxide (which can result in the drink having bubbles). One unit of alcohol is 10ml or 8g of pure alcohol.
When alcohol is consumed, ethanol molecules are absorbed into the bloodstream from the stomach and intestines. Enzymes, which are bodily chemicals that break down other chemicals, then begin to metabolize the alcohol. The body breaks down alcohol through the enzymes alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH). These enzymes break down the alcohol molecule so that it can be eliminated from the body. ADH converts alcohol to acetaldehyde, which is rapidly converted to acetate by other enzymes. Although acetaldehyde is only present in the body for a short time, it is highly toxic and a known carcinogen. Most of the alcohol is metabolized by the liver, but small amounts are eliminated from the body by forming fatty acid ethyl esters (FAEEs), which have been found to damage the liver and pancreas. A small quantity of alcohol is not metabolized and is instead eliminated in the breath and urine, which is how blood alcohol content (BAC) is measured.
Alcohol dehydrogenase activity varies between men and women, young and old, and among populations from different areas of the world. For example, young women are unable to process alcohol at the same rate as young men because they do not express alcohol dehydrogenase as highly, although the inverse is true for middle-aged individuals. Women may have less ADH enzyme activity in the stomach, allowing a larger percentage of alcohol to reach the blood before being metabolized. This could be why women who drink are more susceptible to alcohol liver disease, heart muscle damage, and brain damage than men. Research has also found that alcohol use disorders increased in people of Japanese descent from 2.5% to 13% between 1979 and 1992 among those who carried the protective ADH1B*2 gene.
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Frequently asked questions
Alcohol is made by putting grains, fruits, or vegetables through a process called fermentation.
Fermentation is a chemical reaction where yeast or bacteria react with the sugars in the other ingredients to produce ethanol (the alcohol in the drink) and carbon dioxide (which can mean the drink has bubbles).
The amount of alcohol in a litre of drink depends on the ABV (alcohol by volume) of the drink. For example, a litre of beer with 6% ABV contains 60g of pure alcohol.
