Why does the dragonfish have formaldehyde
When it comes to formaldehyde, many people will think of the pungent odor of renovating a new house, and in some life, formaldehyde also has an antiseptic effect.
Formaldehyde is found in lobsters, which are usually kept fresh by adding a 37% formaldehyde solution.
Has a strong reducing effect, especially in alkaline solutions. Can burn, vapor and air to form explosive mixtures, the explosion limit of 7%-73% (by volume). Ignition temperature of about 300 ℃.
Formaldehyde can be produced by methanol in silver, copper and other metal-catalyzed dehydrogenation or oxidation, but also by hydrocarbon oxidation products can be separated. Used as pesticides and disinfectants, raw materials for the production of phenolic resins, urea-formaldehyde resins, vinyl alcohol, urotropin, pentaerythritol and dyes.
Industrial formaldehyde solution generally contains 37% formaldehyde and 15% methanol, as a polymerization inhibitor, boiling point 101 ℃.
Why is the dragonhead fish called dragonhead fish
The dragonhead fish is a seafood product, Xiapu people commonly known as "water precipitation". Its fat body, flavorful and inexpensive, occupies most of the seafood market in East Fujian. Its snow-white translucent body, beautiful dragon head, like a piece of jade art. Many people know it, but do not know the beautiful legend behind it
Legend has it that the original appearance of the dragon head fish is not beautiful, but has a good heart. Once, the herring asked the Dragon King for a bone to strengthen his body, and the King ordered a hundred kinds of fish to donate a bone each. The king ordered each of the hundred fish to donate a bone. The "Water Fixing" offered the only hard bone, and instantly went limp at the entrance of the dragon palace. The king of the dragon asked the reason, and realized that "water fixed" lost the hard bone, in the future there is really "weak" can be deceived worry, then "water fixed" said: "I give you a I will give you a dragon's head, and when other fish see the dragon's head, they will be as respectful as when they see me, and will not dare to bully you." This is how "Shui Ding" came to be known as the "Dragon Head Fish".
How to make soup with dragon head fish
Ingredients:
Dragon head fish, tender tofu, green onion, ginger, garlic
Method:
1. Wash and kill the dragon head fish, control the water, and marinate with a little cooking wine and pepper for 15 minutes
2. Slice the ginger and garlic, slice the white green onion into inches, and slice the green onion green into chopped scallions
3. Warm a frying pan, pour in a little oil, put in the ginger and dragon head fish frying on medium heat
4. Fry for about 1 - 2 minutes, shake the pan, wait until the dragon head fish can move, add the garlic and green onion white
5. Add a suitable amount of boiling water and a little wine to the pot, open the lid and boil on high heat for about 10 minutes
6. Add the cubed tofu to the pot, continue to boil for 3 minutes, add a little salt and sugar and cook for about 2 minutes, then sprinkle with a little pepper and scallions.