Paper on Water and Health: Part I
Abstract: Coke is a typical carbonated drink, that is, soda water. Its main feature is that carbon dioxide is added to the drink. People love to drink coke, which proves that its taste is really unique. However, the research results over the years show that cola has potential health effects.
Keywords: cola; Health; affect
For the public, especially teenagers, coke is their favorite. However, the threat of cola to health is constantly seen in newspapers, and people have also found a lot about the impact of cola on human health. But in daily life, people are not very clear about the relationship between coke and our human health. Therefore, we will unveil the mystery of Coke's influence and help people learn more about Coke.
We hope that through this research, we can increase people's understanding of some knowledge about coke, let people know whether drinking coke is good or bad, expand our knowledge field and give people some suggestions.
? Two months ago, there was a competition at Dali University in the United States: "Who can drink the most Coca-Cola? The winner drank eight bottles and died on the spot. Because blood vessels contain too much carbon dioxide, but not enough oxygen. Since then, the headmaster has banned the sale of any soft drinks in the welfare club of the university. Someone put the lost tooth in Pepsi for ten days, and it dissolved. Teeth and bones are the only organs in the human body that can survive after death.
? Pour a can of Coca-Cola into the toilet, let this best-selling drink in the world stay for an hour, and then rinse it clean. Citric acid in cola will remove stains from glassy ceramics.
? Pour the whole can of coke into a pile of greasy clothes, add detergent and clean it. Coca-Cola can help separate oil stains. It can also remove the fog from the windshield. ?
As we all know, cola is a carbonated beverage, which contains sugar, phosphoric acid and caffeine. More importantly, it also contains carbon dioxide, although when carbon dioxide burps in the human body, it will take away the heat of the human body and play a cooling role. However, it will also stimulate the secretion of gastric juice. Too much stomach acid can easily lead to bloating, loss of appetite and reduction of daily food intake. However, if the nutrition intake is insufficient, it will affect the normal growth and development, learning effect, sports performance, work performance and health. This series of circular reactions is only part of the danger of coke. Caffeine in cola also has a deep influence on us: drinking too many caffeinated drinks will increase blood lipids and easily aggravate arteriosclerosis; Stimulate myocardial contraction, accelerate heartbeat and breathing; Stimulating gastric acid secretion hurts the stomach?
In recent years, there are four kinds of doubts about cola: (1) spermicide.
1985 According to the New England Journal of Medicine, experts from Harvard Medical School investigated three different formulas of cola drinks on the market. Sperm killing? Experiment. They put frozen sperm into test tubes and poured different cola drinks. After repeated experiments, it is concluded that cola does have spermicidal effect. For men, drinking cola will affect their reproductive ability.
After the results of this study were made public, many young people who want to be fathers are afraid to drink coke. In this regard, a spokesman for the Coca-Cola Company said that other researchers could not confirm the conclusion of Harvard University in later experiments. (2) damage to the brain.
According to the British Sunday Times on February 27th, 20001year, Coca-Cola contains a product called? Aspartame? Aspartame's sugar substitute will have an effect on the brain of the drinker.
In response to this report, the company retorted that aspartame is a safe and applicable low-calorie additive, which has been used in hundreds of foods and beverages in more than 90 countries around the world. Its safety has been recognized by the US Food and Drug Administration.
(3) cause osteoporosis.
On August 24th, 2004, Associated Press reported that a man in South Korea took the Coca-Cola Company to court because he had worked for 30 years.
I have been drinking coke for many years, and my teeth have been badly corroded. I have pulled out 1 1 tooth. Prior to this, American scientists found that drinking carbonated drinks will affect the health of human bones and easily lead to osteoporosis in middle-aged and elderly people, especially menopausal women.
Coca-Cola Company responded that almost all foods, including fruits, butter and soft drinks, contain a small amount of acidic substances. The real causes of osteoporosis include insufficient calcium intake, hormonal changes and lack of physical exercise.
(4) Diet Coke may contain psychotropic drugs.
On August 25th, 2004, Mr. Li, a Tianjin consumer, thought that Diet Coke produced by Tianjin Coca-Cola Company might contain psychotropic drugs? Anna coffee? . Mr. Li said that he bought a bottle of diet coke in the supermarket and found that the ingredients indicated in the drink contained caffeine and sodium benzoate. Mr. Li said that if the two substances are mixed in the ratio of 1: 1, the mixture belongs to a class of psychotropic drugs strictly controlled by the state, and caffeine sodium has been listed as a new type of cheap drug by the Ministry of Public Security of China.
Coca-Cola is obviously not a nutritious and healthy drink. The formula of Coca-Cola in China is much higher than that of some chemicals in the United States. The purpose is to get up and down quickly. As drinks, we should drink less. Children, the elderly and middle-aged women need special reminders, because children are more likely to be addicted to caffeine and have malnutrition problems. Middle-aged women should pay more attention to obesity and calcium loss, while the ability of the elderly to absorb nutrients declines, and drinks with low nutrient density of cola should also be controlled. In addition, cola contains caffeine, and people who drink it often suddenly stop drinking, which may cause headaches, irritability, stomach discomfort and other symptoms. You may wish to reduce the amount of drinking slowly, thus reducing possible discomfort.
Paper on Water and Health: Part II
1 As we know, only three tenths of the water in the world is fresh water. Moreover, most of these fresh waters are distributed in the Antarctic and Arctic, which are permanently frozen and cannot be exploited and utilized by human beings. In fact, the amount of available fresh water is very small, but we don't save water and waste water resources without restraint. In this way, before long, water resources will be exhausted, mankind will perish, all living things in the world will be destroyed, and this beautiful earth will become a ruin.
Water resources, water conservation and water use habits
We should save water resources and cherish domestic water. You must have seen such a public service advertisement: there is a faucet on the TV screen, which is dripping with difficulty. The dripping speed became slower and slower, and finally the water was used up. Then a pair of eyes appeared on the picture, and a tear flowed out from it. Followed by this sentence: "If human beings don't cherish water, then the last drop of water we can see will be our own tears." Water is the source of life. If there were no water on the earth, Mother Earth would not give birth to our descendants. Because the earliest primitive life was first bred in the ocean and gradually extended to the land. Therefore, water is the cradle of life. The survival and development of human beings are also inseparable from water. Because we have to drink water every day, food growth can not be separated from water, and industrial production can not be separated from water. Water is also the "air conditioner" of nature. How happy it would be to have a rain in the hot summer when people feel unbearable heat! Walking by the sea, the sea breeze blows gently, sweeping away the hot and irritable mood; When the cold winter comes, the sea water continuously sends the stored heat to the surrounding land, which is the function of water. Although China is rich in water resources, it can go into battle lightly.
1, water resources are scarce. With the development of industry, water pollution has become a serious problem, and many industrial wastewater stinks. What a terrible thing! In addition, the phenomenon of wasting water is also very serious, according to statistics. A medium-sized city wastes as much water as a Dongting Lake every year! Therefore, in view of the worrying situation of water resources utilization, we should implement planned water use through a series of scientific means, put an end to the waste of water resources, establish a scientific water use system by using advanced science and technology, effectively utilize and protect water resources, and meet the needs of sustainable economic and social development.
2. One of the measures is the reuse of reclaimed water. Mainly, the used water quality can reach a certain use standard after treatment, and can be applied to the preparation of cooling water, multi-purpose water quality and purification and reuse of sewage. The wastewater discharged from industrial production is advanced treated by various physical and biological means to reach the water quality required by the process, and then reused in production, which not only saves water, but also reduces environmental pollution. On the other hand, the reclaimed water recycling system is also very useful in life. For example, the treated wastewater can be used for household cleaning water, road washing, community greening, industrial equipment cleaning and so on.
3. On the other hand, rainwater utilization is also an effective measure to alleviate the contradiction of water resources. It refers to the direct collection, storage and utilization of natural precipitation. At present, there are mainly the following ways of urban rainwater utilization: roof rainwater collection and utilization, roof greening rainwater utilization, roof greening rainwater utilization and roof greening rainwater utilization. Due to the limitation of the existing technology, rainwater utilization is not extensive enough, but it still shows a good prospect.
4. In life, we should also develop good habits of water use. There are many habits related to wasting water, such as: flushing cigarette butts and odds and ends with the toilet; In order to receive a glass of cold water, a lot of water was put in vain; Wash potatoes and carrots before peeling, or rinse them before picking vegetables; Intermittent use of water (when opening the door to pick up guests, answering the phone, changing TV channels), with the faucet on; Forget to turn off the water pipe during the water cut.
5. Head; When washing hands, washing face and brushing teeth, let the water flow all the time; Do not check the faucet before going to bed or going out; The equipment leaked and was not repaired in time. Get rid of bad habits and do your part to save water resources! In today's increasingly tense use of water resources, we should have a sense of saving and develop good water habits, which have a long history and are timeless!
Paper on Water and Health: Part III
Water is the source of life. As a medical student, I know more about the meaning of water to human body than others. Now I will talk about the relationship between water and human health in combination with my major.
As we all know, the earliest living things were born in water (ocean). If there was no water on the earth more than 3 billion years ago, then all life could not exist. Water is the basic condition of life and the basic structure of life structure. As far as human beings are concerned, the composition of our body is roughly as follows: protein accounts for 17%, fat accounts for 14%, carbohydrate accounts for 1.5%, minerals such as calcium account for 6%, and the remaining 6 1.5% is water, that is to say, three of our weight. Physiologically, most tissues of human body are supported by water. The water content of human organs and tissues is roughly as follows: blood 83%, muscle 76%, lung, heart 80%, kidney 83%, liver 68%, brain 75%, and even bones contain 22% water. The human body can be said to be formed by water, and life activities can even be said to be centered on water. Once lack of water, life will inevitably end.
3. As the saying goes: Can people not eat for three days and not drink water for one day? . According to physiological research, the average person can live for about 4 weeks or even two and a half months without eating, but if he doesn't take an intravenous drip, he can only endure it for about 3 days at room temperature, and in hot summer, he may not endure it for a day.
4. Water is an important resource for human survival and social development. Its physiological functions include dissolution and digestion, participation in metabolism and carrier transport, regulation and inhibition, lubrication and moistening, dilution and detoxification, sedation, antipyretic, first aid and accompanying drugs.
5. Water is the premise of survival and the necessity of life; Water is the source of life and the foundation of health. With the development of economy and the improvement of people's living standards, people not only meet the requirements of drinking water safety, but also require drinking water to be healthy. Minerals and trace elements in water are very important to human health. Professor Jin said:? Water plays a very important role in the origin and continuation of life. In this sense, it cannot be said that water is used to quench thirst. The far-reaching significance of water lies in maintaining human health and prolonging life. ?
6. The hardness of water refers to the concentration of calcium and magnesium ions in water. The hardness unit is ppm, and 1ppm means that the content of calcium carbonate in water is1mg/L. According to the hardness of water, the moisture is soft water and hard water. Which is better, hard water or soft water?
7. Hard water contains many components such as calcium, magnesium, carbonate, sulfate and nitrate. Drinking hard water for a long time may lead to gastrointestinal dysfunction, temporary abdominal distension, excessive exhaust, diarrhea, acclimatization and other symptoms. On the other hand, people are prone to kidney calculi and gallstones. Hard water has also brought a lot of troubles to our lives, such as boiling water with hard water, which will deposit a thick yellow-white scale at the bottom of kettle and thermos for a long time; When washing clothes with it, calcium and magnesium ions in water make soluble soap turn into insoluble calcium stearate precipitate, thus making the soap lose its decontamination ability; Cooking with hard water is not easy to soften dishes. If there are too many calcium or magnesium ions in the water, calcium or magnesium will combine with sulfate, making the water bitter and astringent. Sometimes we feel bitter when drinking water, because the hardness of water is too high. In some cities in northern China, the hardness of groundwater is generally increasing year by year, and some cities are increasing at an average annual rate of 0.5 ~ 1 degree. The increase of water hardness is closely related to water pollution.
8. Is soft water safe? Of course, the softer, the safer. Minerals in water are a very important way for our bodies to obtain minerals. For example, in100L of hard water with a hardness of 20 German degrees, the calcium content is equivalent to 6000 grams of pork, 2000 grams of carp or 1000 grams of eggs. Soft water is low in mineral content, and long-term drinking will lead to the lack of some minerals in human body and trigger a series of diseases. It has been reported abroad that heart disease has become a high incidence in areas where soft water is drunk.
9. So now there is a standard for healthy water: (1) does not contain any substance that is toxic, harmful or has an odor; (2) The hardness of water is between 30 and 200 (calculated by calcium carbonate); (3) The content of minerals needed by human body is moderate; (4) The 4)pH value is weakly alkaline (7 ~ 8); (5) The dissolved oxygen in the water is not less than 7 mg per liter, and the carbon dioxide is moderate;
10, (6) the half width of water cluster is less than l00hz, (7) the nutrient physiological functions of water (solubility, permeability, diffusivity, metabolism, emulsifying power, cleaning power, etc. ) are stronger.
1 1. Due to natural reasons, unreasonable human development activities and the restriction of human scientific and technological development level, the deterioration of water quality is threatening human survival and social progress.
12. Pollutants in water can usually be divided into three categories: biological pollutants, physical pollutants and chemical pollutants.
13, 1. Biological pollutants include bacteria, parasites and viruses. There are good ways to kill pathogenic bacteria and parasites. However, the research on pathogenic virus is not enough, and there is no recognized standard for virus killing. There are more than 100 kinds of viruses excreted by human feces, which pollute water sources through different ways. Through routine purification and disinfection, poliovirus, coxsackie virus, rotavirus and hepatitis A virus can partially survive. With the deterioration of water pollution, the original viruses in water may also change and new viruses appear.
14, 2. Physical pollutants include suspended solids, thermal pollution and radioactive pollution. Mainly from the tap water station to the civil and public taps, there are several kilometers of iron pipes and valves, which are corroded all the year round. A large number of suspended sediments are deposited in various electric water heaters, thermos bottles, teacups and our bodies all the year round. Radioactive pollution is the most harmful and generally exists in local areas.
15, 3. Chemical pollutants include organic and inorganic compounds. With the development of analytical technology, more than 2500 kinds of chemical pollutants have been detected from source water. At present, there are mainly (1) waterborne infectious diseases caused by domestic pollutants in water. Drinking unclean water or eating contaminated food can cause typhoid fever, cholera, bacillary dysentery, amebic dysentery, hepatitis A and other infectious diseases. In addition, people move in unclean water, and pathogens in water can also invade the body through skin and mucosa, such as schistosomiasis and leptospirosis.
16, (2) mutagenic, carcinogenic and teratogenic effects. Common mutagenic pollutants in water, such as methyl chloride and acrylonitrile, will have a sudden and heritable impact on the genetic material of organisms; Inorganic substances such as asbestos, arsenic, nickel and chromium, and organic pollutants such as nitrosamines and aniline can all induce the formation of tumors. Methylmercury, sodium pentachlorophenol and other teratogenic pollutants can interfere with the normal fetal development process through pregnant mothers, make the fetal development abnormal and cause congenital malformation, and can also directly act on germ cells, affecting reproductive function and birth defects. (3) The hazards of endocrine disruptors in water environment. Some chemical pollutants, such as dibutyl phthalate, parathion and synthetic pyrethroids, can interfere with the synthesis, metabolism or action of some hormones in the body, thus affecting the normal physiological, metabolic, reproductive and reproductive functions of the body.
Water, air and food are called the three elements of human life and health. Water quality directly affects human health. Therefore, for survival, health and longevity, we must turn bad water and stagnant water into good water and living water, so that the water endowed by nature can return to good water. This is a long-term and arduous task, which needs the attention of the whole people.