Why is coffee bitter?
Why is coffee bitter? A seemingly simple problem has been bothering scientists for decades. Now, scientists have narrowed down their research and targeted two chemical molecules. At the annual meeting of the American Chemical Society, scientists reported that the two bitter chemical molecules were produced during the processing of coffee, a discovery that could revolutionize the coffee processing industry. Since the 1930s, scientists have begun to separate chemicals from coffee, and many flavor-related chemicals have been separated from coffee by scientists, but no bitter chemical molecules have been found. They found that the chemical molecule with the smallest molecular weight in coffee tastes the bitterest, and this molecule becomes the object of further study. After analysis by mass spectrometer, Hoffman identified one of the molecules, chlorogenic acid lactone, which is a decomposition product of chlorogenic acid (found in almost all plants). Hoffman's team then prepared a series of different coffees to determine the content of chlorogenic acid lactone. They found that when roasting coffee beans, it triggers a chain reaction in which chlorogenic acid is first broken down into chlorogenic acid lactone, and if baking continues, chlorogenic acid lactone breaks down into another substance, phenyllindane. Although lactone will only produce mild bitterness in mild and moderate roasted coffee, the secondary decomposition products of lactone will produce strong bitterness if the coffee beans are roasted for a long time. -reproduced from Global Science
- Prev
Taste the elegant aroma of French coffee in the breeze
When it comes to France, there is a sense of romanticism. Indeed, whether it is the classical Louvre on the Seine, or the glowing Champs-Elysees, whether it is the affectionate lover of the big nose, or the clear and blurred eyes of Sophie Marceau, the grass and thing of Paris, one person and one scene, all convey to us a kind of deep and elegant romantic feeling.
- Next
The Beautiful Origin of Coffee
Coffee jacquard technique was defended by the American National people's Congress in 1988. Hume created and developed in his own small cafe in Seattle. It is said that by chance, David. Hume is packing breakfast coffee for the guests. When milk is added, the coffee inadvertently forms a very beautiful heart shape. This inspired him so much that after that he began to study the method of making coffee, and the flowers began to flow.
Related
- Beginners will see the "Coffee pull flower" guide!
- What is the difference between ice blog purified milk and ordinary milk coffee?
- Why is the Philippines the largest producer of crops in Liberia?
- For coffee extraction, should the fine powder be retained?
- How does extracted espresso fill pressed powder? How much strength does it take to press the powder?
- How to make jasmine cold extract coffee? Is the jasmine + latte good?
- Will this little toy really make the coffee taste better? How does Lily Drip affect coffee extraction?
- Will the action of slapping the filter cup also affect coffee extraction?
- What's the difference between powder-to-water ratio and powder-to-liquid ratio?
- What is the Ethiopian local species? What does it have to do with Heirloom native species?