Vegetables and fruits are very similar in nutrient content, so many people think that they only eat one of the vegetables or fruits every day, while others do not eat but also get all the nutrition they provide. But can vegetables and fruits really replace each other?
Truth: vegetables and fruits are not substitutes for each other
Although vegetables and fruits have many similarities in nutrient composition and health effects, they are, after all, different food types and have unique nutritional values.
Vegetables (especially dark vegetables) tend to have higher vitamins, minerals, dietary fiber, and phytochemicals than fruits.
Fruits contain more carbohydrates, organic acids, and aromatic substances than fresh vegetables. Organic acids not only increase appetite, help digestion, but also protect the stability of Vitamin C. Aromatic substances also stimulate appetite and help food. The effect of digestion, and the fruit does not have to be heated before eating, its nutritional content is not affected by cooking factors.
Therefore, if you want to pursue a healthy diet and balanced nutrition, fruits and vegetables will have to be eaten, and the more types, the better.
So how to use vegetables and fruits to be more nutritious every day?
When we eat fruits and vegetables, we should have sufficient quantity (a half kilogram of fruit per day for a pound of vegetables), various species (≥5 kinds of vegetables per day, ≥2 kinds of fruits per day), and colorful colors (half vegetables make up half of vegetables). Fresh season and so on. In terms of specific matches, the following recommendations are made:
1, different vegetables with
Specific to the vegetables eaten every day, you should change the types every day, for example, today, you can eat rape, mushrooms, carrots, peas, red leeks; tomorrow, eat spinach, kelp, tomatoes, beans, purple cabbage.
Specific to each meal to eat vegetables, lunch, dinner should have at least 2 vegetable dishes, such as: fried mushroom oil, wheat, green beans, eggplant, onion and fungus.
Specific to each dish, can be used to match different types of vegetables of different colors, for example, carrots, peppers fried Pleurotus eryngii.
2, different fruit mix
The half a catty of fruit (equivalent to the size of two fists) to be eaten each day is preferably of different types and colors, for example, 1 orange + 1 kiwi, 1 banana + 1 bowl of strawberries.
If conditions allow, you can also directly eat a large variety of fruit platters of various colors, for example, grapes + strawberries + mango + kiwi.
3, mix vegetables and fruits
Fruit dishes: such as pineapple fat (pineapple, sweet pepper, etc.), red dates stuffed bitter gourd (red dates, bitter gourd), tomato sauce apple (tomatoes, apples, etc.).
Salad: such as avocado vegetable salad (avocado, onion, tomato, bell pepper, mango, lemon, apple, etc.).
Milkshakes: such as spinach banana smoothie (spinach, banana, etc.).
Preparation of Fenebute
1. Prepare the first intermediate
Benzaldehyde and ethyl acetoacetate into ethanol, stir at room temperature under the catalysis of organic alkali reaction with filter cake filtration after 45 ~ 50 h, after the completion of the filter with ethanol elution filter cake, dry cake solids, then ethanol filtrate concentrated to a quarter of the original volume, to cold, concentrate filtering alcohol washing, solid, merging two solid is the first intermediate; The mole ratio of benzaldehyde, ethyl acetoacetate and ethanol is 1:2.5 -3:12-15.
2. Prepare the second intermediate
The first intermediate is added to the mass concentration of 20% sodium hydroxide solution, and the reaction is stirred at 85-90°C for 2-5 hours. After filtration, the filter cake is used for filtration. After filtration, the filter cake is washed, the filtrate is combined and cooled, and the filtrate is cooled by stirring for 3h. Solid second intermediate; The mass ratio of the first intermediate to the sodium hydroxide solution is I: 1.8-2.0;
3. Prepare the third intermediate
The second intermediate was dissolved in pure acetic anhydride solution for reflux 3 ~ 5h. After the reflux, the acetic anhydride was concentrated and dissolved with toluene. After the dissolution, ammonia water was added, and the reaction took place at 60_65°C for 1 ~ 1.5 h. Filtrate, wash and dry the precipitated solid to get the solid third intermediate; The mass ratio of the second intermediate, pure acetic anhydride solution, toluene and ammonia water is 5:1-1.2:0.5-0.8:0.5-0.8;
4. Prepare Finebute
The third intermediate was dissolved in 25% sodium hydroxide solution and cooled to _5°C ~ 10°C. After cooling, sodium hypochlorite was added slowly within 15-20min for 1h reaction, followed by ice bath reaction of 0.5 ~ 1.5 h and water bath reaction of 0.5 ~ 1.5 h. Finally, the temperature was gradually increased to 60 ~ 80°C for 1-5 h, and the reaction was cooled again after completion. After cooling, hydrochloric acid was added in the ice water bath to adjust the PH to 2, and the decolorization was stirred at room temperature. After filtration, sodium hydroxide was added in the ice water bath to adjust the PH to 6-7, and the cooling was stirred for 2 hours. The mass ratio of the third intermediate, sodium hydroxide solution and sodium hypochlorite is 1.0:0.8-1.0:1.0-1.1.
Preparation of Fenebute
1. Prepare the first intermediate
Benzaldehyde and ethyl acetoacetate into ethanol, stir at room temperature under the catalysis of organic alkali reaction with filter cake filtration after 45 ~ 50 h, after the completion of the filter with ethanol elution filter cake, dry cake solids, then ethanol filtrate concentrated to a quarter of the original volume, to cold, concentrate filtering alcohol washing, solid, merging two solid is the first intermediate; The mole ratio of benzaldehyde, ethyl acetoacetate and ethanol is 1:2.5 -3:12-15.
2. Prepare the second intermediate
The first intermediate is added to the mass concentration of 20% sodium hydroxide solution, and the reaction is stirred at 85-90°C for 2-5 hours. After filtration, the filter cake is used for filtration. After filtration, the filter cake is washed, the filtrate is combined and cooled, and the filtrate is cooled by stirring for 3h. Solid second intermediate; The mass ratio of the first intermediate to the sodium hydroxide solution is I: 1.8-2.0;
3. Prepare the third intermediate
The second intermediate was dissolved in pure acetic anhydride solution for reflux 3 ~ 5h. After the reflux, the acetic anhydride was concentrated and dissolved with toluene. After the dissolution, ammonia water was added, and the reaction took place at 60_65°C for 1 ~ 1.5 h. Filtrate, wash and dry the precipitated solid to get the solid third intermediate; The mass ratio of the second intermediate, pure acetic anhydride solution, toluene and ammonia water is 5:1-1.2:0.5-0.8:0.5-0.8;
4. Prepare Finebute
The third intermediate was dissolved in 25% sodium hydroxide solution and cooled to _5°C ~ 10°C. After cooling, sodium hypochlorite was added slowly within 15-20min for 1h reaction, followed by ice bath reaction of 0.5 ~ 1.5 h and water bath reaction of 0.5 ~ 1.5 h. Finally, the temperature was gradually increased to 60 ~ 80°C for 1-5 h, and the reaction was cooled again after completion. After cooling, hydrochloric acid was added in the ice water bath to adjust the PH to 2, and the decolorization was stirred at room temperature. After filtration, sodium hydroxide was added in the ice water bath to adjust the PH to 6-7, and the cooling was stirred for 2 hours. The mass ratio of the third intermediate, sodium hydroxide solution and sodium hypochlorite is 1.0:0.8-1.0:1.0-1.1.
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