Autumn wind, sweet scented osmanthus. What is the fragrance of Osmanthus fragrans? Why can people “smell flowers”? The food flavor innovation team of Shanghai Jiaotong University has brought the popular science of “fragrance”. According to the records, the cultivation history of Osmanthus fragrans in China is more than 2500 years, and China is the first country in the world to cultivate and apply Osmanthus fragrans. The folk cultivation of Osmanthus fragrans began in the Song Dynasty and flourished in the early Ming Dynasty. Five osmanthus producing areas in Chinese history were formed here. In 1771, Chinese Osmanthus fragrans was introduced into Britain from Guangzhou via India. At present, there are about 157 varieties of Osmanthus fragrans, and the most common varieties in China are Jingui, Yingui, Danggui, sijigui, etc. < / P > < p > the team found that the research on the aroma components of Osmanthus fragrans flowers began in the 1960s. The research showed that linalool, β – ionone and dihydro – β – ionone were the most important components in the aroma of Osmanthus fragrans flowers. These substances cooperated with other aroma active substances to produce the unique aroma of Osmanthus fragrans. Moreover, the aroma components and their mass fractions of different groups of Osmanthus fragrans are also quite different, which makes the aroma of different groups of Osmanthus fragrans different. < / P > < p > this is because olfaction is related to cognition, memory and emotion. In short, when people smell a fragrance for the first time, the brain will capture the characteristics of the smell. When they feel the smell, they also remember the information of vision, touch, taste and other senses at that moment. The next time you smell the same smell, the brain will recall all the memories associated with it. Therefore, when the fragrance of Osmanthus comes, the smell will evoke Association, and “identify” the fragrance of osmanthus. < / P > < p > in order to retain the fragrance of Osmanthus fragrans, petroleum ether, ethanol and other organic solvents are usually used to extract the aroma components from Osmanthus fragrans flowers and store them in extracts, essential oils and other products. Sweet scented osmanthus cake, sweet scented osmanthus wine, processing sweet scented osmanthus flavor food is also one of the ways to keep this season. However, it is difficult to avoid the loss of some aroma substances in the processing of processed products, sometimes resulting in the change of aroma. So, it’s better to seize the good time to enjoy the flowers, smell the sweet scented osmanthus, and leave a good memory. After 12 years, “world class Super project” Shantou Bay Tunnel ushers in a historic breakthrough today