-
Is the foam on tea related to the quality of the tea?
When brewing tea, a layer of foam may appear on the surface of the tea liquor, known as tea foam. Opinions about this foam have been divided throughout history. Tea sage Lu Yu believed that this layer of foam contained the essence of the tea, but not everyone appreciates this layer of foam. There is even a saying that "foam indicates high levels of pesticide residues." So what causes the foam? Is there any relationship between the foam in the tea and the quality of the tea? Image What is tea foam? The formation of foam in tea liquor is mainly due to the presence of a substance called tea saponin. Tea saponin, also known as tea sapogenin, is a fine columnar crystal found in the roots, stems, leaves, and seeds of tea plants. Its aqueous solution can produce persistent, soap-like foam when shaken. Tea saponins are a class of structurally complex glycoside compounds with a bitter and pungent taste. They have strong foaming properties and are not affected by the hardness of the water, so teas with abundant foam tend to have a relatively rich flavor. In the Wei-Jin era, Du Yu wrote in a poem: "The foam forms… -
Digital technologies restore looks of 2,200-year-old woman
CHANGSHA, May 17 ( tasteallchina ) -- Lady Xin Zhui, a 2,200-year-old mummified aristocrat from central China, has been recreated in digital form, giving some idea of how she looked at age 35. On Friday, the Hunan Museum in Changsha, central China's Hunan Province, released the image of a "3D digital figure" of Xin Zhui, one of the most famous wet mummies in the world. The image consists of a seated figure of an amicable-looking woman with coiled hair and delicate makeup, which represents the likely look of the noblewoman at the age of 35. Also made public is an earlier digital recreation of the face at 50, Xin Zhui's approximate age of death. The digital image was created based on X-ray scans of the skull conducted following the corpse's excavation about five decades ago, coupled with on-site observation and historical records, said Duan Xiaoming, director of the museum. The museum launched the project to digitalize Xin Zhui last October. Leading experts on facial reconstruction were invited to produce a sculpture of her face, which helped a tech firm create a digital model of the 50-year-old lady. AI technology was then employed to create a rejuvenated version at the age…
❯
Search
Scan to open current page
Top
Checking in, please wait...
Click for today's check-in bonus!
You have earned {{mission.data.mission.credit}} points today
My Coupons
-
$CouponsLimitation of use:Expired and UnavailableLimitation of use:
before
Limitation of use:Permanently validCoupon ID:×Available for the following products: Available for the following products categories: Unrestricted use:Available for all products and product types
No coupons available!
Daily tasks completed