应用化学专业英语论文

Alert life chemical carcinogensKey words: cancer, additives, smoking, cosmetics, preventionChemistry is a natural science foundation of human development is of great significance to life, also to have the very big relations. As is known to all, we all the things around them are made by many chemical elements, including our human indispensable many elements. According to some chemical knowledge and phenomenon can also help people to do some common useful things. Food, clothing, shelter, transportation, use, chemical omnipresent. With the development of productive forces, the progress of science and technology, chemical and people's life more and more closely related. Chemistry in the human production and life played an inestimable role. Any affairs, however, every coin has two sides, in bring us convenient, but also bring us some potential hazard. All kinds of chemical pollution, industrial waste water waste smoke not only give nature cause environmental pollution, but also harmful to the health of the human body, and some is through our common to eat or drink and cause of the human body damage, one of the biggest than some carcinogenic chemical substances, and these have we can avoid. Here is the most common said concentrationAs the saying goes "a fool's mouth is his destruction, a close mouth catches no flies", is now the most basic eat will affect the human body health, according to the survey, in our country in cancer patients, about 35% - 50% is happening and diet, food processing related, and so on, this is mainly due to the food of all kinds of food additives cause.In nowadays, additive are some improve food quality, extend the shelf life of food, is advantageous for the food processing and increase food nutrition composition of chemical synthesis or natural material. For example, acidity regulator, HuSeJi, enzyme preparation, flavoring agent, anticaking agent, antifoaming agent, antioxidant, bleach, raising agent, preservatives, sweeteners, thickening agent, spices, etc., for example, once used as artificial cream coloured "cream yellow", etc., and it is these all manner of various additives, give us the body cause many potential harm, of course, if in strict accordance with the various national standards apply to add some, the problem is not big, but unluckily so some illegal businessmen, venality, not the consumer safety, disorderly to add some additives, leading to many consumers don't understand body hurt. One of the biggest is an incident recently "melamine milk powder" incident. In the event it was household SanLu company, although this is not carcinogenic, but the consequences of the same so serious, have a few years ago "Sudan red" event, was just a normal chemical dyeing agent, and the mercenary businessmen know cheating a manic consumers, illegal food additives in the content, the researchers found that they can cause human liver cell DNA mutation, have certain carcinogenic properties, although and proved in organisms, not quickly lead to illness. Come into contact with the material also can cause cancer does not mean that cancer will happen, but it is dangerous. Now almost on the shelf put all kinds of affairs, noadditive. Eating the flavor of the ham, instant noodles, etc., still think that delicious, what does not know is the usual we love to eat, sleep more than home the "bread" don't know how much delicious food, snacks is the including add most, preservative, condiment, etc., especially the preservative and hair color agent of nitrate, very easy to become a strong to intestines and stomach cancer nitrosamines, also recently international food and agricultural organization and health organization recommended efficiency and security of anticorrosive antistaling agent sorbic acid, widely used in widely used in the food, beverage, tobacco, chemicals, cosmetics and other industries, although is considered to be a kind of good antiseptic, but once the food additives sorbic acid overweight serious, consumer long-term use, to a certain extent body harm the health of the kidney, liver, and the same distortion, cancerous.Of course as long as all kinds of additives are strictly in accordance with the relevant national gauge of the standard of right amount to add, all kinds of food or safe, but in life we should eat less as far as possible some obvious will add a lot of food additives.Another kind of carcinogenic hidden trouble things, is also common, that is, cigarettes, a large number of studies have shown that smokers lung cancer than ordinary people high twenty ~ 25 times, and the amount of smoking and smoking the length of time the positive correlation. Smoking has hundreds of years of history, smoking not only harm your body, and at the same time, thus causing injury to another person, the dangers of smoking is a well known fact that foreign psychological research institutions to a research results show that smokers intelligence efficiency than smokers by 10.6%. Different cigarette ignited the release of chemicals are different, but the number of main chemical material such as tar and carbon monoxide. Cigarette lit produce harmful substances can be divided into six categories:(1) aldehydes, nitride, olefin, these substances may stimulate to the respiratory tract.(2) the nicotine class, can stimulate the sympathetic nerve, make smokers form depend on.(3) amine, cyanide and heavy metals, these all belong to the poisonous substance.(4) carbon monoxide can reduce red blood cells will oxygen throughout the body to ability(5) phenolic compounds and formaldehyde, etc., these substances have accelerated the role of canceration.(6) styrene-acrylic pyrene, arsenic, cadmium, methyl hydrazine, aminophenol and other radioactive substances.These substances are carcinogenesis. Said to cigarettes cancer have to say its important ingredients: nicotine, nicotine is a kind of nerve toxin, main infringer of the nervous system. Some smokers in subjective feeling smoking can relieve fatigue, brace yourself, this is the nervous system of a sexual excitement, is actually caused by the nicotine exciting. After the excitement of the nervous system immediately appear inhibition. So, after smoking neuromuscular response sensitivity andprecision decreased. Nicotine addictive and produce dependence are usually difficult to restrain themselves and a cigarette contains nicotine can kill a mouse, and nicotine in cigarettes can kill a cow. The lethal dose is fifty to 70 mg, equivalent to twenty ~ 25 cigarettes nicotine content. If a cigar or three cigarettes nicotine injection of intravenous 3 ~ 5 minutes death. Tobacco is not only to higher animals harmful, but is also harmful to the lower animals, so also is the main component of agricultural pesticides.. The cigarette burning smoke contains more than thousands of chemical substances, which have certain carcinogenic substance has a 3, 4 - benzopyrene, nicotine, tar, etc. In addition, radioactive elements polonium - 210, carbon - 14 and arsenic, nickel and so on also have the effect that cause cancer. Recent studies show that Japanese scholars, smoke also contained so far known material toxic strongest compound "dioxin". By reducing the tar content or add a filter in the tobacco carcinogenic composition change, the lung cancer histologic type can also change, more proof of the occurrence of smoking and lung cancer is closely related. The same smoking and central, cerebrovascular, and greatly influenced on the digestive tract, respiratory tract, all kinds of such as stroke, coronary heart disease, hypertension disease, cerebrovascular disease, chronic bronchitis, emphysema and chronic inflammation and ulcer and so on some great harmfulness of disease will because smoking and morbidity than the average amount of smoke much higher. Even so, still a lot of people regardless of the dangers of smoking and smoking, especially after China's smoking power, and constantly pack-years smoked reduced, more and more teenagers out of curiosity to imitate smoke, always think smoking is to show he is a man, in order to prove that the mature and deliberately to smoke, and smoke with the increase of the number of smoking increased. By day several teams to a pack, two bag, two packs of above is more sat there smoking, can not flameout, a joint a uninterruptedly smoke. So for you and other people's health, please from tobacco smoke.There is a huge in our life carcinogenic harm, that is cosmetics, this time, the woman cosmetics almost cannot little, cosmetics to the woman is a kind of irresistible temptation, little imagine, the potential harm the same great harm, cosmetics carcinogenic news also common occurance, more than perfume toxic, many beauty cosmetics are carcinogenic, American association of herb that, more than 60% of the skin care raw materials through the skin surface into the body, in other words, if the cosmetics toxic or synthetic raw material, will aggravate heart, liver, kidney and other organs, and discharge poison the burden of health hazard. In Britain last year, in October, a research report, British women are most European countries use cosmetics, last year to buy all kinds of cosmetics cost about 6.4 billion pounds, average daily use 12 kinds of cosmetics, contains chemicals at least 175 per person per year on average, through the skin or mouth absorb chemicals about 2.25 Kg. Therefore, if the cosmetics is used undeserved or abuse, will be a health hazard, light in the human skin has the stimulation, heavy then cause cosmetic dermatitis, and even cause cancer, life-threatening, that cosmetic beauty not only get the result of beauty, but become beauty makeup trap. This can say, cosmetics is fatal attraction!First of all, cosmetics contain a variety of chemical substances, most worrying is to belong to light base benzoic acid type of preservative. Statistics show that 99% of makeup products and 77% of discharge makeup products contain light base benzoic acid. Light base benzene formic acid can destroy hormones. Evidence suggests that they will imitate the female hormone estrogen, if women life constantly contact estrogen, may increase the risk of suffering from breast cancer. Onestudy showed that light base benzoic acid appeared in breast cancer group active in the sample rates as high as 90%, may also harm the male reproductive ability. Secondly, it is long term frequently used hair dye have may cause permanent damage to human body, recent studies have found that women in the urine of hair, hair can be found with the mutation ordinary matter, prompt the hair dye is absorbed by the hair after the possibility of cancer. The American cancer society recently 13000 hair women were investigated and found they had leukemia number is not hair women's 3.8 times. And women use hair dye, with lymphoma opportunities increased by 70%.Moreover, women are mostly like beauty lip wipe lipstick, lipstick and so on, also should pay attention to prevent a health hazard. The main components of the lipstick is lanolin, waxy and dye, because wool grease composition complex, easy to cause allergic reaction, such as lip mucosa weather-shack, peeling, sometimes lips feel itchy or slight pain, etc.; Lanolin has a strong adsorption, the air in the dust, bacteria, virus and some heavy metal ions adsorption in the lips mucous membrane. The basic core sweet red lipstick, rouge of eosin, flame red and so on all have strong carcinogenicity. All lipstick is used in coal tar dyestuff, are terrible carcinogenic substance, and the substance of the lipstick contains quantity, has been greatly more than food allowed in the content. While other perfume, spot, nail art, give or have a permanent wave and so on are all have carcinogenic hazard. In the use of cosmetics should be healthy use, away from the cosmetics causes cancer, don't take all kinds of advertising,Now although house prices high all the way, but people still in order to house constantly struggle, and decorate building become necessary, during dangers they came, the daily average about 80% of the time spent indoors. As the production and way of life of the more modern, more work and recreational sports activities can be done indoors, shopping also don't have to go shopping every day, right indoor small climate make people don't often go outside for a control effect, so that people's indoor activity time is more, even as high as 93% above. Therefore, indoor air quality on human health is more close relationship is more important. Although, the indoor pollutant concentration often is low, but due to the contact time is very long, so the cumulative exposure is very high. Especially just finished building, the formaldehyde, benzene series content and radon is strong carcinogenic substance. Formaldehyde has been the world health organization determined for cancer and cause deformity substances, is recognized as the allergy source, but also potential strong mutagenic, one of the things in our country's hazardous chemicals priority control list, formaldehyde at the second. The main harm of formaldehyde performance for the skin and mucosa stimulation, formaldehyde is protoplasm toxic substances, can bind to proteins, the high concentration of inhaled appear respiratory serious stimulus and edema, eye irritation, headache, the skin direct contact with formaldehyde can cause allergic dermatitis, splash, necrosis, suction high concentration formaldehyde can induce bronchial asthma, high concentration formaldehyde or a gene poisonous substance. The experiment in the laboratory animals high suction, can cause nasopharyngeal cancer. Formaldehyde is made of synthetic resin, paint, plastics and synthetic fiber raw material, they will gradually into the surrounding environment release residual or does not participate in the reaction of formaldehyde release period, the longest can amount to more than ten years. And new decorated house general formaldehyde will be overweight, as long as in the new room put a two basin bracketplant, formaldehyde will be part of the absorption, but to remove formaldehyde was a scientific problem, so should as far as possible to pay attention to indoorformaldehyde reasonable purification, will harm to the minimum.There are many some often meet carcinogenic such as:Pesticide: many pesticides have the effect that cause cancer. Pesticide basic divided into organochlorine, organic phosphorus and organic nitrogen three. Organochlorine main induced liver tumor, organophosphorus can cause breast and ovarian tumors, organic nitrogen and lymphoma relevant. Long-term edible contaminated vegetables, is the leading cause of cancer, atherosclerosis, cardiovascular disease, fetal malformation, stillbirth, early deaths, premature aging diseases such as important reason. In recent years, the incidence of cancer is more and more high, and increasingly younger, largely and eating contaminated vegetables relevant.Benzene, benzene as organic solvent and chemical raw materials, in the industry are widely used. Chlorobenzene, nitrobenzene, spices, medicine, pesticide, synthetic fiber, synthetic rubber, synthetic plastics (polystyrene), synthetic dye and other production are in benzene as raw materials. Long-term contact of benzene can cause chronic benzene poisoning, still can lead to leukemia.Dye, such as azo dye, b aniline, benzidine to wait, all have strong carcinogenesis. And our clothing is colored dye dyeing system and become, the harm is all around us.Polycyclic sex hydrocarbons as long as there is in such as coal tar, asphalt, crude paraffin, creosote, anthracene oil, etc., these substances containing 3, 4 - benzopyrene, is a kind of important carcinogen, tobacco and many of the content.Whether what carcinogenic factors, people body contact of toxic chemicals are relatively minor, toxic chemicals in the body of the deposit needs a long process, and only increased the possibility of cancer, not will cause cancer. So there is no need to talk about chemical colour change, do not need to worry too much, as long as life contact less as far as possible, away from and shoddy products, indoor often ventilated, keep the air circulation, in the work to establish and implement safety production system, regular monitoring environment carcinogenic content. In the daily life as long as a note, this is how how, find out problems and solutions, and to minimize the harm, nip in the bud. Not so terrible.。