Coffee has more than 800 flavors.
Aroma is the most important product attribute of special coffee, and even instant coffee aroma substances can stimulate our taste buds. The difference is that instant coffee lacks the most important aromatic volatile components, which also leads to a reduction in overall flavor.
The fragrance can be felt by two different mechanisms. It can be felt by using the nose or returning to the snort. Nasal sensation occurs when coffee is present in the mouth or has been swallowed and the fragrant restorative substance floats up to the nasal cavity.
At present, more than 800 aroma substances have been found in coffee. With the improvement of the accuracy of analytical methods, more and more aroma substances will be found. The aroma of coffee is determined not only by the concentration of aroma substances but also by their threshold. A relatively small number of ingredients have high concentrations and low thresholds, and they also constitute the aroma of coffee that we perceive.
The aroma of coffee is largely determined by the roasting degree of coffee beans, and there are four main reactions in the roasting process:
Maillard reaction, which is a reaction between nitrogenous substances (amino acids, proteins and trigonelline, and serotonin) and carbohydrates (sugars).
Degradation of individual amino acids, especially thionine, hydroxyl and proline.
The degradation of sugar leads to caramelization.
Carbolic acid degradation, especially quinic acid semi-group.
Other reactions are related to lipid degradation, and there are hundreds of interactions between intermediate decomposition products.
- Prev
How do you drink coffee when you ride a bike?
In Europe and the United States, people like to drink coffee very much. if you travel by bike, it is very difficult for you to carry a cup of coffee. At present, a frame has been invented, which is made of aluminum tube and rubber. There are six colors. When people buy coffee, they can put it in.
- Next
Forecasts show that coffee production in Brazil will be reduced by more than 9% this year.
Brazilian coffee production will reach 44.57 million bags (60 kilograms each) this year, a decrease of 9.33 percent from 2013, according to the latest forecast released by the Brazilian state supply company on the 15th.
Related
- The more you look at it, the weirder it becomes?! Lucky linkage cup print three-eyed Tom Cat!
- Self-delivery modification was rejected! Customers come to the door and throw coffee angrily?!
- What degree of grind should I use to make coffee by hand? How fine should the coffee powder be ground with cold ice drops? What is the No. 20 screen? How fine are the grains of fine sugar? What is the appropriate grind for the espresso?
- Why is coffee bean watches always oily? Are the oil out of the coffee beans stale? Are oily coffee beans of higher quality? What is the difference between deep and light coffee?
- How long is the taste period for coffee? How long is the best time to finish your coffee? How long can coffee stay in a thermos cup? What is the best degree of hand-brewed coffee?
- Pour out all the raw materials! Many Lucky products are off the market!
- "Haidilao in the milk tea industry" Kawangka quietly increases its prices again! Netizen: No more drinking!
- Ask for 20,000 yuan! Coffee shop managers trick employees into fake marriages?!
- Milk tea takeout "strong" with 10 packs of tissue?! User: No collection or delivery
- Which is sour, deep-roasted or lightly roasted coffee? Do people who know coffee want light or deep roast? What is the difference in the degree of roasting coffee? What is the difference between lightly roasted coffee and deeply roasted coffee?