How many chemicals are there in a cup of coffee
Coffee flavor chemistry has been studied for more than 200 years. Researchers have been committed to the separation and identification of coffee flavor substances. At present, more than 1000 coffee flavor substances have been reported. People can smell the aroma of coffee, because of the volatility of chemical molecules, the flavor of these chemical molecules is combined to form the taste of coffee. A doctor from the Swiss Federal Institute of Technology once said in his graduation thesis: "people like coffee not because it has good nutritional value or health care function, but because it has a little exciting effect." its flavor is also unique.
In the book Coffee Flavor Chemistry, the author describes in detail the research history, development status, research methods and formation mechanism of coffee flavor, and introduces the flavor characteristics of special varieties of coffee, such as Blue Mountain Coffee, Special roasting Coffee, Kopi Luwak and so on. At the same time, the analytical method of distinguishing Arabica coffee mixed with Roberta coffee by high performance liquid chromatography was introduced in detail.
When it comes to the original intention of writing this book, I would like to start with a story six years ago when Zeng Fankui was a PhD student: "at that time, I saw that the teacher wanted to entertain a German friend with freshly brewed coffee. He put the crushed coffee powder in the cup and made a cup of coffee like tea. Because the dregs were not separated, the foreign friend stood by the sink and took a sip of coffee and spit out dregs. The scene was quite awkward at that time. " Zeng Fankui said that only after that did he want to really understand coffee.
"the taste is delicious", "Didi is fragrant, but the meaning is not enough"-from the advertising words of coffee, we can see that flavor is the soul of coffee. Recently, "Coffee Flavor Chemistry", co-written by Dr. Zeng Fankui of Lanzhou Institute of Chemical Physics of Chinese Academy of Sciences and Professor ou Shiyi of Food Department of Jinan University, was published by Jinan University Publishing House. This is the first academic monograph on coffee processing in China.
Holding a handful of coffee beans in his hand, Zeng Fankui said: "Raw coffee beans basically do not smell fragrance, and the flavor substances in coffee are mainly produced through the thermal reaction of the roasting process." The process of roasting is the process of chemical changes in coffee beans-sucrose, chlorogenic acid, protein, trigonelline, fat and other components will form the flavor of coffee through maillard reaction and strecker degradation reaction. The origin, roasting degree and brewing mode of coffee will affect the flavor of coffee.
Zeng Fankui was really asked to write a professional book on coffee flavor because in 2011 he read such a passage in a foreign book, the Handbook of Coffee appreciation: it is said that China also produces coffee, but the origin and output are not clear. "Let foreigners know about Chinese coffee, let Chinese people know about our own coffee, and stimulate people's interest in coffee." With such an idea, Zeng Fankui combined with his own research, referred to a large number of foreign coffee papers, journal papers, patents and so on to write such a book. (this article is reproduced)
- Prev
Have you ever heard of coffee to brew beer?
Recently, San Diego-based ModernTimes Brewery Brewery has brewed an unprecedented coffee beer, and the secret of its success lies in the coffee beans used in brewing. Nowadays, brewing beer with coffee has become a popular trend in the world beer industry. Many brewing companies try to use white, including white
- Next
Canada-style wooden coffee maker New coffee maker
Canadiano is a wooden coffee machine designed just for you, and the designer calls it a coffee machine designed for the plus brew method. Square on the outside and round on the inside, it looks like a wooden box. Inside is a wooden bowl with a gradually smaller cross section. In the middle is a replaceable conical filter. When using, put the coffee maker on a mug, add two spoonfuls of coffee, pour hot water into a wooden bowl, and after 2-4 minutes
Related
- Can you make coffee with 5g of beans? What is the minimum number of grams of coffee beans used for hand-brewed coffee? What brewing plan should I use for less flour?
- Why do Japanese people like to make coffee with flannel? What is the difference between flannel filter cloth and filter paper cup? What are the characteristics of flannel filter cloth for making coffee?
- A coffee shop drives customers out on the spot?! Store: No Chinese people are accepted
- Children suffocated and died after drinking pearl milk tea! Parents: The store did not inform the risk
- Can I put a thermos in a thermos pot to keep my coffee warm? Why does coffee not taste so good after it cools down? What is the most suitable amount of milk for latte?
- How to make coffee cream? Do I have to use instant powder for 400 hand-made coffee? What is the composition of coffee cream in Naples coffee?
- What is an authentic cappuccino? How to make cappuccino golden circles? What is the ratio of coffee to milk in a cappuccino?
- Can espresso beans be used to make hand-brewed coffee? What is the difference between Italian mixed beans and hand-made single beans? What are the characteristics of SOE coffee beans?
- Big battle! Mixue Ice City has opened three stores in the United States?!
- Lucky launches rice milk latte! Netizen: After drinking it, I thought I bought it an ordinary latte