harm to Chinese people no doubt much more smoke than PM2.5.&quot

now, people on the PM2.5 (aerodynamic diameter in 2.5 micron particles) hazards have been quite familiar with, so the smaller particles? Research group led by Fudan Cheap Canadiens Jerseys School of public health, Shanghai City Atmospheric Particulate Pollution Control Key Laboratory of Professor Kan Haidong, a study done in the study of particulate air pollution and health hazards found, particle size in the range 0.25-0.50 microns particle number concentration on Ju Minjian Kang, especially the relationship with the risk of cardiovascular disease the most obvious, and the smaller the particle size, the greater harm to health.

"the smaller particle size, the greater the harm"

reporter yesterday learned from the Fudan University, research papers recently published in the field of public health journals "environmental health perspectives". The first author Meng Xia introduced, in recent years, our country many serious haze, the primary pollutants which are concerned with PM2.5. But how to health hazards of smaller size particles? In this regard, the research group in a city in China, measured 0.25-10 micron (PM0.25-PM10) the number of 23 groups of different diameter particles concentration range, the analysis and comparison of their relationship with the Cheap Jets Jerseys residents' health risk ", the smaller particle size, the greater the harm the health".

Meng Xia speculated, the particle Cheap Panthers Jerseys is small, the number concentration and total surface area corresponding to the larger, more likely adsorbed more harmful substances enter the body, possibly with different size of particles in the settlement of the lower respiratory tract, particle size less than 0.50 micron particles mainly by diffusion method deposition, and greater than 0.50 micron particles mainly impact deposition.

cannot only focus on PM2.5

A particulate

Kan Haidong show to human intrusion diagram shows, more than 7 micron particles may enter into the nasal cavity, 4.7-7 micron particles can reach the pharynx, 3.3-4.7 micron particles can reach the main trachea, 2.1-3.3 micron particles can reach the bronchial, 1.1-2.1 micron particles can reach trachea end, 0.65-1.1 micron particles can reach the alveolar.

The results of this study suggest that

, particles in the health hazards of small Cheap Wild Jerseys grain size (e.g. less than 0.5 microns), the number of parts, rather than size, heavy weight part. This provides a new direction for prevention and control of pollution of atmospheric particulates in China, maybe we should focus on more small particle size, not just PM2.5.

in addition, Professor Yang Xinceng Department of environmental science and engineering Fudan University made mainstream smoke particulate smoke particle size analysis, "the mainstream smoke filter out all the intermediate particles, diameter is less than 0.5 micron". Therefore, harm to Chinese people no doubt much more smoke than PM2.5." Kan Haidong stressed. Cheap Canucks Jerseys

Kan Haidong also gave some individual health protection method for atmospheric pollution. For example out into >