Why do raisins soak in water for days and get white things on the cup?

Hoarfrost on grapes is a sugar alcohol secreted by fruits and vegetables themselves, also known as fruit powder, which is a biosynthetic natural substance and is completely harmless to the human body.

This type of compound is insoluble in water, but soluble in organic solvents such as chloroform, so no matter whether it is blistered, washed, or rubbed, this layer of hoarfrost cannot be completely removed from the peel. Legend has it that flour can be used to wash away hoarfrost, but in fact, it does not really wash off hoarfrost, but only changes the structure of hoarfrost or plugs the gap between hoarfrost crystals. Expansion:

Hoarfrost on grapes is harmless to humans. This layer of fruit powder has a protective effect on the fruit, such as this layer of fruit powder on the surface of grapes can reduce water evaporation, thereby preventing rapid water loss and shrinkage after fruit picking, which has a positive effect on adapting to arid environments. The water-insoluble nature of the powder prevents the formation of a moist environment on the surface of the grapes, thus reducing the infestation of pathogenic bacteria.

The hoarfrost on the surface of the grapes also contains yeast, so homemade wines can be fermented without the addition of yeast. It should be explained that grapes are not susceptible to insects, and most of the current cultivation is bagged, and the probability of using high concentrations of pesticides is very small, so if it is determined that it is the grapes themselves, there is no need to wash them off. - To a certain extent, hoarfrost is a sign of grape freshness, but it is not inevitable that some merchants spray low-concentration fungicidal pesticides.

The specific way to distinguish this is that the normal "hoarfrost" is naturally and evenly distributed and does not cover the color of the grape skin, which makes the grapes look more beautiful. And in the case of the agent "hoarfrost", the appearance is unevenly distributed, and there will be dark blue traces in it. 】

Why soak raisins in water? I had white things on my back for a few days, why did I soak raisins in water? How many days have the cup been in vain?

Why do you put raisins in water? Why put raisins in the water when they have grown white for several days? There is a white thing on the back for several days, why do you give the grapes well, and when they go to the water, they are white things that have grown for several days, why do you soak the raisins in the water?

For a few days, there was something white on the back, put the raisins and soak them in water for several days, and there was something white on the cup.

Ingredient breakdown.

Ingredients: 20 grams of yogurt, 20 grams of sago, 20 grams of honey red beans, grapes, 20 grams of milk, and the steps of grape red bean sago dew.

1. Prepare the ingredients: honey red beans (made by yourself, with rock sugar), yogurt (also made by yourself), sago already cooked, milk, grapes.

2Peel the grapes and place them on the bottom of the bowl.

3Add the yogurt.

4Scoop the sago into a bowl.

5. Add milk. 6Add the honey red beans.

7And he peeled a grape and put it on the sago for garnish.

Tip: Milk can be changed to coconut water, this dessert has a rich taste, I don't add extra sugar, only take the original flavor of various ingredients, you can add honey or sugar according to your taste.

A work from Gourmet World Winter Mood.

You can make a grape leaf lamb roll 1Cut the mutton and sheep's tail oil into pieces and put them into a meat tattooing machine to grind into minced mutton; Wash the dried pea cresses and rice; Remove the roots of the onion, wash and mince it, add salt, pepper and minced mutton and stir into a filling; Peel and mince the garlic. 2.

Wash the grape leaves and remove the tendons and spread them flat, put a spoonful of meat filling in the middle to roll them into a roll, put the mouth down into the claypot) casserole), stack a layer of meat rolls, sprinkle a layer of minced garlic until the yard is finished, put in the chicken broth to cover the meat rolls, sprinkle mint leaves on top and boil, cover the lid, and simmer for about 45 minutes, sprinkle in coriander leaves. Roasted grape leaf vegetarian stuffed wrap Ingredients: 500g zucchini Accessories:

250 grams of rice (steamed) 150 grams of tomatoes 100 grams of onion (red skin) 30 grams of grape leaves 10 grams of mint Seasoning: 100 grams of vegetable oil 15 grams of lemon juice 35 grams of tomato paste 4 grams of salt 2 grams of pepper.

Preparation: 1Peel and cut the zucchini, scoop out the pulp and seeds and rub them into fine strips; 2.

Wash and chop the onions and tomatoes; 3.Wash the grape leaves; 4.Heat oil in a pot and stir-fry the onion until fragrant; 5.

Then add the zucchini and stir-fry, add lemon juice, mint, salt, pepper and rice and stir-fry well to make a filling; 6.Spread out the grape leaves, place the filling on the grape leaves in strips, roll them into rolls, and stack them in a baking sheet; 7.Pour in the tomato paste and an appropriate amount of vegetable broth, and bake in the oven for about 20 minutes before serving.

It's good to add some meat to make a clear soup, and you can also stir-fry.

In addition to eating grapes directly, grapes can also be juiced, and the grape skins and seeds are removed and put into a juicer to squeeze the juice. Grapes can also be used as fruit salads, peeled and cut into pieces with other fruits, and stirred with salad dressing.

In fact, grapes can also be made into grape juice, and in this way, it is also very delicious, and the taste is very good, which is very popular with people.

1. Frozen grapes, wash the grapes and put them in a sealed box and put them in freezing, the frozen grapes taste the same as eating popsicles. 2. Grape milkshake, put the washed grapes and yogurt together in the food processor and stir them, the sweet and sour ones are super delicious.

Grape jam step 1

Peel the washed grapes and remove the seeds, and place the skins and pulp in a bowl for later use.

Step 2Put the grape skins in an acid-resistant pot (e.g. stainless steel pot), add water and bring to a boil over medium heat, then reduce the heat to low and continue to cook until the juice is purple-red.

Step 3: Remove the skins and squeeze out the juice.

Step 4: Put the grape pulp in the pot.

Step 5: Pour the juice over high heat and bring to a boil.

Step 6: Turn the heat to low and add the maltose to continue to boil, and you must use a wooden spoon to stir constantly when boiling.

Step 7: After the maltose is completely dissolved, add caster sugar and continue to mix and cook until the sauce is thick.

Cooking skills. The original recipe was 600 grams of grapes, and I only have 450 grams left, but the recipe is the same.

My grapes are a little sour, and the amount of sugar can be adjusted by yourself, but in addition to the role of flavoring, white sugar also has a role of preservative.

It would be better if you added half a lemon juice, it tasted better and the color was better.

When boiling the grape skins, the color of the juice is very beautiful, but after boiling, the color is not purple enough, and some are dark red, perhaps because of the variety.

Menu features. Give the grapes a longer life, so jam is the best place to be. Seasonal fruits and peaches are also on the market in large quantities, and they are also good for jamming. The sweet, sweet and sour made by hand is very refreshing to eat directly or mixed with water, and it is also good to use in baking.

The first step is to wash the grapes, prepare an appropriate amount of ice, and an appropriate amount of sugar.

In the second step, put the ingredients in a juicer and break them together, wait until they turn into a smoothie and pour them out, ready to eat.

Ingredients: 1 bunch of purple grapes.

Preparation of grape purple smoothie.

Pick the grapes one by one and wash them.

Drain the grapes and freeze them overnight.

Take out the frozen grapes.

Put it in a food processor and stir, and add a few more grapes that are not frozen, otherwise the frozen grapes will not break.

Sprinkle the stirred grapes with honey and serve.

Grapes can be used to make wine. The taste of the wine is very good, sweet and sour, and there is a lot of flavor.

In the case of grapes, most of them can't be made into any delicacies, he just eats them as a fruit, and at most grapes can be made into raisins.

Hello, you can make cakes or wines with this grape, they are very delicious and very nutritious.

.d Analysis: After Zhang Qian passed through the Western Regions, the Silk Road was opened, and grapes, pomegranates, and Hami pipes in the Western Regions were introduced to the Central Plains.

c Pomegranate Xianyang, the capital of the Qin State, is now Xi'an, and pomegranates are produced in Xi'an.