Chemical knowledge The pH of food is 1. What is the acidity and alkalinity of food?
Almost all delicious foods are acidic, such as fish, meat, rice, wine, sugar and so on. , are all acidic foods. On the contrary, alkaline foods such as kelp, vegetables, white radish, tofu and so on. Most of them are foods that are not easy to arouse appetite but are good for the body.
Laymen think that sour things are acidic foods, such as strawberries and lemons, which make people drool at first sight. In fact, these things are typical alkaline foods, which is the trouble. It can be judged by referring to the contents of calcium and phosphorus in food. Calcium is an alkaline food and phosphorus is an acidic food.
Therefore, we should carefully examine whether the food we eat on weekdays tends to be too acidic. White rice is a typical acidic food. China people who take it as their staple food will easily become acidic if they don't consume a considerable amount of alkaline food.
Especially in recent years, environmental pollution, pesticide pollution of fruits and vegetables, chemically processed food and other hazards caused by industrial development have intensified, and soil acidification has led to a relative lack of calcium in food. In addition, there is another reason for acidic constitution, that is, the mental stress reaction of urbanites.
The pressure from the outside, through the diencephalon, reaches the accessory kidney and pituitary gland, and then reaches various organs through hormone secretion. At this time, if the calcium ion in the blood is determined, it will definitely drop below the normal value, that is, the pressure will reduce the calcium ion in the blood and make the blood acidic. In short, environmental pollution and abnormal living and eating habits make our constitution gradually acidic, and the disorder of life rhythm will cause acidic constitution. Too nervous mood and the load of the body undergoing surgery are easy to make our constitution acidic.
The food we eat every day can be roughly divided into acidic food and alkaline food. From the point of view of nutrition, the reasonable combination of acidic food and alkaline food is the guarantee of good health.
Food list acidic and alkaline foods: egg yolk, cheese, dessert, sugar, tuna and flounder. Acidic food: ham, bacon, chicken, pork, eel, beef, bread and wheat.
Weakly acidic food: white rice, peanuts, beer, laver, octopus, chocolate, hollow powder, onion. Strongly alkaline foods: grapes, tea, wine, kelp, oranges, persimmons, cucumbers and carrots.
Moderately alkaline foods: soybeans, tomatoes, bananas, strawberries, protein, prunes, lemons, spinach, etc. Weak alkaline food: red beans, apples, Chinese cabbage, tofu, cabbage, rape, pears, potatoes.
Most people have a vague understanding of the acidity and alkalinity of food, and think that lemon that tastes sour is acidic. In fact, the acidity and alkalinity of food is not simply judged by taste.
The so-called acidity and alkalinity of food refers to whether the inorganic salts in food are acidic or alkaline. The acidity and alkalinity of food depends on the type and content ratio of minerals contained in food: potassium, sodium, calcium, magnesium and iron react in an alkaline way after entering the human body; Phosphorus, chlorine and sulfur are acidic after entering the human body.
Alkaline foods are mainly divided into: 1. Vegetables and fruits; Second, seaweed; Third, nuts; 4. Cereals and beans that have sprouted. Avoid or reduce the intake of the following acidic foods: 1. Starch; Second, animal food; Third, sweets; Recommended four kinds of alkaline foods 1. Apples.
Fruit is the most digestible food and the best cleanser in the body. Among fruits, apples are called the best alkaline food, which can improve the acidic constitution to maintain the acid-base balance of the human body. Eating apples can quickly neutralize excessive acidic substances in the body, thus enhancing physical strength and disease resistance.
In addition to neutralizing the acid-base balance, research and analysis also show that eating apples often is beneficial to lose weight, because apples will increase satiety, and eating before meals can reduce food intake and achieve the purpose of losing weight. 2. Vegetables: Almost all vegetables, especially green leafy vegetables, are alkaline foods.
They are rich in vitamins and minerals and can supplement the body with nutrition. A large amount of cellulose in vegetables can also improve the digestive function of the human body and maintain the health of the stomach.
Therefore, it is very suitable to use them to neutralize a large number of acidic foods in the body, such as meat and starch, to help food digest and excrete in time and refine processed foods (such as white bread); 5. Fried food or cream; .
2. What are the high school chemical acidic foods and alkaline foods?
First, acidic and alkaline foods.
1. The so-called acidity and alkalinity of food refers to whether the inorganic salts in food are acidic or alkaline. General metal elements such as sodium, calcium, magnesium, etc. They are all alkaline in the human body, and foods containing more of these elements are alkaline foods, such as soybeans, tofu, spinach, lettuce, radish, potatoes, lotus roots, onions, kelp, watermelons, bananas, pears, apples and milk. Some foods contain more nonmetallic elements, such as phosphorus, sulfur and chlorine. After oxidation in human body, acidic free radicals with anions are generated, which belongs to acidic food. Such as pork, beef, chicken, duck, eggs, carp, oysters and shrimp, as well as flour, rice, peanuts, barley and beer.
2. If there are more sodium ions, potassium ions, magnesium ions and calcium ions produced after food metabolism, it is easy to produce more alkali in the body and form an alkaline reaction. Generally speaking, foods containing more minerals such as potassium, calcium and magnesium are alkaline foods.
Second, alkaline food.
1. Weak alkaline foods: red beans, radishes, apples, cabbages, onions, tofu, etc.
2. Moderately alkaline food: dried radish, soybean, carrot, tomato, banana, orange, pumpkin, strawberry, protein, dried plum, lemon, spinach, etc.
3. Strongly alkaline foods: grapes, tea, wine, kelp buds, kelp, etc.
4. Vegetables and fruits are alkaline foods.
5. Meat is generally acidic.
6. Coarse grains are alkaline, while flour and rice are acidic.
7. Fish is also an alkaline food.
8. Alkaline foods: tofu, milk, celery, potatoes, bamboo shoots, mushrooms, carrots, kelp, mung beans, bananas, watermelons, strawberries, etc.
9. Weak alkaline foods: potatoes, Chinese cabbage, Lu Xun, bamboo shoots, pea pods, pumpkin, lotus root, radish stains, tofu, apples, pears, bananas, pineapples, cherries, peaches and beef.
10, strong alkaline foods such as milk, tomatoes, cucumbers, radishes, carrots, fig spinach, celery, citrus, grapes, taro, kelp, raisins and glutinous rice.
1 1, weakly alkaline foods: red beans, radishes, apples, Chinese cabbage, onions, tofu, etc.
12. Moderately alkaline foods: dried radish, soybeans, carrots, tomatoes, bananas, oranges, pumpkins, strawberries, protein, dried prunes, lemons, spinach, etc.
13. Strongly alkaline foods: grapes, tea, wine, kelp buds, kelp, etc. In particular, natural green algae is rich in chlorophyll, which is a good alkaline health care product, while tea should not be excessive, and the best drinking time is in the morning.
Third, acidic food.
1, weakly acidic food: ham, cream, eggs, soft-shelled turtle, shrimp, abalone, clam, octopus, macaroni, chocolate candy, fried food, onion and fried chicken.
2. Strongly acidic foods: beef, pork, tuna, oysters, cheese, rice, wheat, bread, wine, peanuts, sausages, sweets, biscuits and sugar.
3. Animal protein: It contains too much fat, so it is acidic. The order of acidity from big to small is pork, mutton, beef, chicken and fish.
4. Strongly acidic food: egg yolk, cheese, west point made of white sugar or persimmon, mullet roe, firewood fish, etc.
5. Acidic food: ham, bacon, chicken, tuna, pork, eel, beef, bread, wheat, cream, horse meat, etc.
6. Weakly acidic foods: white rice, peanuts, beer, wine, fried tofu, seaweed, clams, octopus and loach.
Fourth, comprehensive classification.
Acidic food: animal food other than milk, such as grain, candy, cakes, fish, pork and other animal meat;
Alkaline food: plant food other than whole grains, such as fruits, vegetables and bean products; Among animal foods, only milk and animal blood are alkaline foods, and others are acidic foods;
Neutral food: oil, salt, coffee, tea, etc.
3. 1 How to judge the acidity and alkalinity of food
Human food can be divided into acidic food and alkaline food. Judging the acidity and alkalinity of food is not based on human taste, nor on the chemical properties of food dissolved in water, but on the acidity and alkalinity of the final metabolites produced after food enters the human body. Acidic food is usually rich in protein, fat and sugar, and contains more acid-forming elements. Acidic substances can be formed after metabolism in the body, which can reduce the p H value in blood and body fluids. Vegetables and fruits contain potassium, sodium, calcium, magnesium and other elements, which are metabolized in the body to generate alkaline substances, which can prevent the blood from changing to acidity. Therefore, sour fruits are generally alkaline foods rather than acidic foods. Chicken, fish, meat, eggs, sugar, etc. are not sour, but they are acidic foods.
After a long-term study, a pathologist in the United States pointed out that only when body fluids are weakly alkaline can human health be maintained. Normal body fluids are weakly alkaline, and people will feel muscle and joint pain and mental fatigue after physical exercise. The main reason is that a large number of sugar, fat and protein in the body are decomposed, and acid substances such as lactic acid and phosphoric acid are produced in the process of decomposition. These acidic substances * * * human tissues and organs, make people feel sore muscles and joints, mental fatigue. At this time, if you simply eat meat, eggs, fish, etc. Rich in acidic substances will make body fluids more acidic, which is not conducive to the lifting of fatigue. Eating more fruits such as vegetables, sweet potatoes, oranges, apples, etc. can eliminate excess acid in the body, reduce the acidity of urine, increase the solubility of uric acid, and reduce the possibility of acid forming stones in the bladder.
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Acidity and alkalinity of food and beauty
Generally speaking, acidic foods make the skin weak, while alkaline foods make the skin healthy. If you eat too much acidic food, the blood acidity will increase, the blood activity of the whole body will slow down and you will feel tired. On the contrary, alkaline food can improve the state of blood, make the whole body refreshed, prevent and treat skin diseases such as dermatitis that are easy to occur in people with weak skin, and prevent premature roughness and aging of the skin.
So, how to distinguish acidic food from alkaline food?
Strongly acidic foods: beef, pork, chicken, tuna, oysters, flounder, cheese, rice, wheat, bread, wine, peanuts, sausages, sugar, biscuits, white sugar, etc.
Weakly acidic foods: ham, eggs, lobster, octopus, squid, buckwheat, cream, peas, eels, river fish, chocolate, onions, hollow powder, fried tofu, etc.
Strongly alkaline foods: milk, tea, persimmons, cucumbers, carrots, radishes, spinach, oranges, grapes, taro, kelp, figs, raisins, etc.
Weak alkaline food: potatoes, cabbage, bamboo shoots, mushrooms, rape, pumpkin, tofu, apples, pears, bananas, cherries, etc.
When eating acidic food, especially meat, be sure to eat enough vegetables at the same time. Calcium and potassium in vegetables can neutralize sulfuric acid and phosphoric acid in meat.
In addition, calcium can strengthen the skin, enhance the skin's resistance and eliminate allergies. Calcium can also reduce the permeability of blood vessel wall, prevent inflammation and have therapeutic effect. Foods rich in calcium include milk, small fish, shellfish, dried fish and seaweed.
Vitamin c has a reducing effect, which can inhibit the increase of pigment, make the skin fair and prevent sunburn. Foods rich in vitamin C include lemon, citrus, tomato, strawberry, radish, cabbage, rape, apple, watermelon, cucumber and cantaloupe.
Fair complexion and sufficient blood color are the standards of healthy and beautiful skin. Poor skin color is mainly caused by anemia, so eat more iron-rich foods, such as cherries, spinach, carrots, sesame seeds, laver, broad beans, shellfish, sardines, dried fish and so on. Green tea contains more chlorophyll and vitamin C, which can make the skin fair and full of blood.
4. Junior high school chemistry, the acidity and alkalinity of common substances in life
This is the joy of discovering and exploring chemistry in life. Acid-base is the most basic concept, and I will briefly list a few of them below, in order to achieve the purpose of attracting jade:
1. vinegar, including all kinds of vinegar, white vinegar and mature vinegar, is acidic as its name implies!
2. Soda and baking soda are slightly alkaline; Soda soda is sodium carbonate ~
3. Washing powder is generally weakly alkaline.
4. carbonated drinks such as soda, cola and sprite. We taste sour, sweet and sour!
Preserved eggs will be alkaline, so it is not advisable to eat too much in a short time, otherwise it will cause discomfort due to hyperacidity.
6. All kinds of fruits, especially those rich in vitamin C, are also acidic! (dimension c is acidic)
7. Painting the wall is alkaline. Wash your hands in time after contact.
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In fact, if you think about it carefully, you can come up with many things. Chemistry is a very interesting science. Thinking more will definitely help you a lot!
Handmade works, feel helpful, remember to "agree"! You can ask questions if you don't understand. I am waiting for you to adopt! Hehe ~ ^o^
5. About the acidity and alkalinity of food
In today's society, people live well and generally eat well, which leads to overnutrition.
This diet belongs to acidic food, so we should pay more attention to increasing the intake of alkaline food to neutralize the acidic metabolites produced by excessive intake of acidic food, so as to maintain the physiological acid-base balance and prevent acidosis. At the same time, for people with nutritional deficiency, especially those in poor areas, the main manifestations are lack of mineral trace elements or insufficient intake of protein. In this case, it is necessary to supplement balanced nutrition to maintain the normal acid-base balance, especially to supplement foods rich in mineral micronutrients and abundant in protein (such as spirulina foods).
Soil can be divided into acidity and alkalinity, and so can human constitution. Chemically, any substance that releases hydrogen ions in solution is an acid; Whoever accepts hydrogen ions is alkali.
Normal body fluids maintain a relatively stable PH value and are neutral and weakly alkaline. The normal pH range expressed by pH value is 7.35~7.45. Because there is a perfect regulation mechanism in the human body, it can maintain acid-base balance. Food can also be divided into acidic and alkaline.
1. Nutrients such as carbohydrates, protein and fat that acidic foods enter the body are acidic substances, such as pork, beef, chicken, fish, shrimp, egg yolk, rice, barley, wheat, brown rice, laver and persimmon. These foods constantly produce acidic substances in the process of metabolism, but they are neutralized by buffering substances in the blood, so as not to make the internal environment of the human body acidic.
At the same time, the body excretes a lot of acidic substances every day to maintain the acid-base balance in the body. 2. There are few alkaline substances in the metabolites of alkaline food, which mainly come from food, such as milk, egg white, soybean, adzuki bean, tofu, spinach, cucumber, eggplant, carrot, lotus root, onion, sweet potato, potato, kelp, grape, banana, apple, orange, pear, watermelon, garlic, tea and other alkaline foods.
They are oxidized and decomposed into inorganic salts and gases in the body. Inorganic salts are soluble substances, that is, alkaline substances, which can neutralize acidic substances and maintain the normal acid-base balance of human body fluids. The human body has the ability to naturally regulate the acid-base balance of body fluids. Therefore, in general, when you are partial to meat (acidic) or vegetables and fruits (alkaline), don't worry too much.
Regulating acid-base balance mainly has the following links; 1。 Regulation of respiratory center.
Once the acidity and alkalinity of body fluids increase, breathing will be accelerated and more carbon dioxide will be exhaled. 2. Renal excretion.
When the body fluid is acidic, acidic urine can be excreted from the stool through the kidney. Neutralization of liver.
The liver produces ammonia in the process of protein metabolism, and when there is excess acid in the body, the blood vessels dilate; When alkaline, blood vessels contract, thus making acid-base neutralization neutral. Yifeng alkaline life liquid is superior to tap water and purified water in physiological efficacy, because Yifeng alkaline life liquid presents many water quality characteristics.
Its main points are as follows: 1. The safety of Yifeng alkaline life liquid zero pollution source water is the premise of water health and efficacy. Through comprehensive water quality analysis, its water source does not contain heavy metals, inorganic salts, radioactive elements and biological pollution. 2. Long water age Because of the long process of the formation of the water in the Muztag Glacier, the age of the nutrient water in the Pamir Glacier mineral spring cells is 1400 years, as determined by the Address Testing Center of the State Seismological Bureau.
3. High-energy water energy is the property of matter. Everything has energy (cohesive energy of matter), and water is no exception. The energy state of water is the active basis of water, and only water with high energy state is a small molecular group with structure.
The energy of water comes from the earth's natural magnetic field and stratum rocks, and Pamir ice spring is high-energy water. 4. High surface tension, low melting point and boiling point. The ancient book Ben Cai Jian pointed out that "the mountain is thick and the spring is thick", in which "thickness" is the surface tension in modern scientific terms, and this phenomenon can also be observed in life. Good spring coins float easily on the water. Through the measurement in Peking University, it can be seen that the surface tension of Mustag glacier water is large, and its melting point and boiling point are higher than tap water and pure water.
5. Tritium content in low tritium water has a great influence on biological physiological efficacy. Tritium is difficult to metabolize after it enters the human body.
Tritium-rich water has adverse effects on human heredity, metabolism and enzyme activity. After testing, the tritium content of spring water is lower than that of seawater, tap water and inland water, and the Mustag glacier water can be called low tritium water.
6. Through the analysis and verification of water source, Mustafa Glacier Water fully meets the national Standard for Natural Mineral Water. The developed mineral water source must be tested for 54 water quality standards, among which 9 indicators are boundary indicators, namely lithium, strontium, metasilicic acid, selenium, free carbon dioxide and dissolved total solids. One or more mineral water sources must meet the requirements. Generally, one standard is called ordinary mineral water, and more than two are called high-quality mineral water.
The probability that natural water quality meets the three standards at the same time is very low, while lithium, strontium and metasilicic acid in the cell nutrient water of Pamir Glacier mineral water meet the standards at the same time. 7. An important feature of natural weak alkali Muztag glacier water is natural weak alkali, and its PH value is 7.5-8.5.
Weak alkaline water plays an important role in regulating and maintaining the normal acid-base balance of human body. 8. Small molecular clusters (clusters) of water structure Because water molecules are polar molecules, under natural conditions, they generally exist in the form of polymers associated with multiple water molecules, also known as water cluster clusters (clusters).
By measuring the FWHM of tap water and purified water, it is generally above 100HZ, and the FWHM of high-quality Muztag glacier water is 50-60 Hz, and it is very stable. The smaller the half-width of water, the stronger the activity of ice and the stronger the physiological function of human body.
6. What is the difference between the acidity and alkalinity of food to the human body and the acidity and alkalinity of chemical concepts? Please elaborate.
Hello, nutritionally speaking, the pH of food refers to the product of food digestion.
Acidic food: food with high content of acidic elements such as sulfur, phosphorus and chlorine. It is oxidized and metabolized in the body, generates acid free radicals with anions, and finally generates acid gray matter. Physiologically, these foods are called acidic foods.
Common foods: rice flour, eggs and meat.
Alkaline food: Any food that can provide more minerals such as potassium, calcium, sodium and magnesium is alkaline in the body.
Common foods: fruits and vegetables, milk, soybeans, fungi.
Chemical acid-base refers to the PH value, less than 7 is acidic, and more than 7 is alkaline.
For example, oranges, vinegar and hawthorn are all sour, but they are all alkaline foods. Steamed bread is tasteless and acidic.
PS: I study nutrition and food safety.
7. How to distinguish the acidity and alkalinity of food and how to classify it?
Hello!
The acidity and alkalinity of food is mainly judged by the content of calcium and phosphorus in food. Calcium is an alkaline food and phosphorus is an acidic food.
Such as fish, meat, rice, wine, sugar and so on. It's all acidic food. On the contrary, alkaline foods such as kelp, vegetables, white radish, tofu and so on. Most of them are foods that are not easy to arouse appetite but are good for the body. Quite right, people think that sour things are acidic foods, such as strawberries and lemons, which make people drool at first sight. In fact, these things are typical alkaline foods.
Next, I will list the common acidic foods and alkaline foods in our daily life. From the point of view of nutrition, the reasonable combination of acidic food and alkaline food is the guarantee of good health.
Strongly acidic food: egg yolk, cheese, dessert, sugar, tuna, flounder.
Acidic food: ham, bacon, chicken, pork, eel, beef, bread and wheat.
Weakly acidic food: white rice, peanuts, beer, laver, octopus, chocolate, hollow powder, onion.
Strongly alkaline foods: grapes, tea, wine, kelp, oranges, persimmons, cucumbers and carrots.
Moderately alkaline foods: soybeans, tomatoes, bananas, strawberries, protein, prunes, lemons, spinach, etc.
Weak alkaline food: red beans, apples, Chinese cabbage, tofu, cabbage, rape, pears, potatoes.
Thank you ~ ~