Chemical composition of Colla Corii Asini: mostly made of collagen and its partial hydrolysis products, containing 16.43-16.54% nitrogen, basically protein. Hydrolysis produces a variety of amino acids, including lysine 10%, arginine 7%, histidine 2% and so on.
From the point of view of the amino acids produced, Colla Corii Asini is similar to gelatin, but the former lysine is more, and contains cystine, and the lack of tryptophan. Containing ash 0.75 ~ 1.09%, calcium 0.079 ~ 0.118%.
According to the National Pharmacopoeia clearly stipulates that Colla Corii Asini can only be boiled with donkey skin. Other animal fur boiled gelatin efficacy varies, including cowhide boiled gelatin called yellow gelatin, the effect of the second, and with the horse skin boiled Colla Corii Asini effect is the opposite, once consumed by pregnant women, very likely to lead to miscarriage.
Expanded Information:
"Harmony" is the essence of everything in the universe and the basis for the survival of all things in heaven and earth. Mencius also said, "Timing is not as good as location, location is not as good as harmony", the Nine Dynasties Tribute Gum is the crystallization of "Timing, Location, Harmony".
Lao Zi, the founder of Taoism, put forward in the "Laozi" chapter 42, "everything negative yin and embrace the yang, and gas and" the idea that "Tao" contains two opposite aspects of yin and yang, everything contains yin and yang, yin and yang interaction and constitute the "and". The interaction of yin and yang constitutes "harmony". Yin and yang are born together to gather the essence, and water and fire together to produce sacred medicines. Taoist Colla Corii Asini precisely contains the concept of the unity of heaven and man, the harmony between water and fire, and the harmonization of yin and yang.
As early as the end of the summer and the beginning of the Shang Dynasty, Yi Yin, the originator of Tang Liquid, discovered the medicinal efficacy of Colla Corii Asini and was honored as the "originator of Colla Corii Asini" by the later generations. Water is the soul of the gum, the Northern Wei Dynasty Li Daoyuan "water Jingji" said: "Dong'a well, which is as huge as a wheel, six or seven zhang deep, often boiled in the year gum to tribute to the Heavenly Palace."
The water for the nine-dynasty glue must be taken at the time of the winter solstice to take the water of the yin; the nine-dynasty glue must be refined with the skin of the donkey, which is purely natural and precious grasses; the water of the Dong'a well, and the fire of the mulberry wood, which has been refined through ninety-nine handmade procedures and nine days and nine nights.
Collecting "the spirit of heaven and earth in one furnace", taking advantage of "the time, the place, the people and the harmony", Jiuzhaogonggou is not only negative yin and hold the yang and gather, follow the time and the trend of the birth, and in the dark and the Chinese tradition of "and" culture, which is in line with the Chinese culture.
In order to promote and inherit the profound traditional culture of Chinese medicine in China, Qin Yufeng, the representative inheritor of the national intangible cultural heritage of Dong'a Colla Corii Asini refining technology and president of Dong'a Colla Corii Asini, has resumed the refining ceremony of the Nine Dynasties' Tribute Colla Corii Asini after many years of interruption since 2007, and every year at the time of winter solstice in the old lunar calendar, the ceremony is held on schedule in Dong'a County, Shandong Province, where the Colla Corii Asini is originally located - the original source of the Colla Corii Asini. -The ceremony is held on schedule in Dong'a County, Shandong Province, which is the origin of Colla Corii Asini, and is ancient and sacred.
People's Daily Online - Health, culture and history, who made Dong'a Gum