Asbestos can cause cancer
Asbestos is how to pollute the environment and to become a professional killer, experts say: when the materials containing asbestos damage, tiny fiber into the air and produce pollution. Asbestos fiber into the air, can produce physical injury and cell toxicity to human body, which can cause asbestosis, give priority to with whole lung diffuse fibrosis of systemic disease, mainly for cough, shortness of breath and severe pulmonary dysfunction. Asbestos fibers in the lung deposition can cause lung cancer and malignant mesothelioma, almost all commodities of asbestos are carcinogenic.
Russian academy of medical sciences, the national cancer science center through many years research, not only found that asbestos can cause cancer, and explained the mechanism of cancer. By Russian researchers scavenger protein found in the patient's immune system is analyzed, think that it is these proteins scavenger, leading to the toxicity and carcinogenicity of fiber. In the research on organization of lung and malignant tumor cells found in the experiments, the asbestos itself does not cause cancer, to those who take charge of the fiber is carcinogenic and dust particles on the basis of the synthesis of active oxygen radicals.
In addition, the researchers found that dust particles and fibers of scavenger with active protein, and scavenger protein increased the cellular sensitivity to the groups. When people breathe periodically asbestos dust, active oxygen group constantly add filling the lungs. The oxygen atoms can make normal lung cell death, or mutate, resulting in the occurrence of cancer. Asbestos can produce conflict after inhaled and complex mechanism of the phenomenon.
Although asbestos has been explicitly included in the carcinogen, but it must be in the air content reaches a certain extent will cause harm to human body health. Therefore, those even use the building materials containing asbestos old homes, as long as keep intact state, asbestos fiber did not enter the indoor air, there would be no harm to human body health.
Data show that because of asbestos can be carcinogenic, 36 countries worldwide have banned the use of asbestos: European countries have banned imports of asbestos from 2005, and plans to use different safety synthetic fiber to replace natural asbestos.
The achievements of modern composite materials in the field of, also create conditions for solving the problem of asbestos substitute. Such as resin matrix composite materials (FRP) has light weight, high strength, good corrosion resistance, good insulation temperature tolerance, and good construction technology and its characteristics can be designed, has been widely used in various fields, carbon fiber and its composite materials have high specific strength, high temperature resistant, corrosion resistance, fatigue resistance, small expansion coefficient, and a series of excellent performance. These new material more accord with the requirement of people for health and green living environment.
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