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The Study of 900～1900MHZ Electromagnetic Fields in Urban Environment on the Nervous System and the Hematological System

Author: LiJianChao
Tutor: ChenYu
School: Chongqing Medical University
Course: Occupational and Environmental Health
Keywords: Electromagnetic radiation Urban environment Nervous system Blood system
CLC: R818
Type: Master's thesis
Year: 2011
Downloads: 46
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Abstract

Objective: epidemiological investigation and measurement of electromagnetic field strength and composite power density of 900 ~ 1900MHz band coverage area urban living environment, to understand the level and characteristics of the urban environment of electromagnetic radiation and analyze the possible impact of factors to explore the city 900 ~ 1900MHz band coverage area of ??the environment the level of electromagnetic radiation exposure to the population of the nervous system and blood system of private prosecution symptoms and peripheral blood cells. Methods: (a) of Chongqing certain universities old, two new campuses as the experimental group and the control group. The old campus is located in the downtown region, the new campus is located in the remote suburbs, two campuses the student dormitory indoor and outdoor 900 ~ 1900MHz band electromagnetic radiation, electric field strength and composite power density were measured. (B) as the exposed group in the old campus of 130 randomly selected students, at the same time as the control group, 119 randomly selected students in the new campus, two campuses were selected for the survey of 249. (C) recommended by WHO questionnaire unified design printed, on-site survey conducted face-to-face with each survey. (D) at the same time being investigated object is required to complete the survey recommended by WHO neurobehavioral core test combination (WHO-NCTB), to detection survey neurobehavioral function state. (E) After the completion of the survey questionnaires and neurobehavioral function tests fingertip peripheral blood, collected the subject of the investigation, immediately Hematology routine testing. Results: (a) the highest value of the old campus and the new campus of the electric field strength 1MHz ~ 40GHz frequency band, respectively, 1.23 ± 0.18 V / m and 0.95 ± 0.06V / m; composite power density of the old campus and new campus The highest values ??were 8.57 ± 7.34μW/cm ~ 2 and 3.34 ± 3.13μW/cm ~ 2, were lower than the corresponding the environmental electromagnetic health standards the international ICNIRP guidelines issued by the State Environmental Protection Administration's export limit, but 0.7GHz to 3GHz, 0.1 to 3000MHz, 1MHz ~~ 40GHz the three frequency segment electromagnetic radiation level of the electric field strength and environmental composite power density levels, the new campus of indoor and outdoor measurement values ??were significantly lower than the old campus of the difference was statistically significant (P <0.01). (B) The survey results show that the positive rate of the old campus at the new campus of the signs include drowsiness, fatigue, weakness, insomnia, dreams, and suspect that he was sick five indicators were higher exposure group, the difference was statistically significance (P lt; 0.05). Nasal bleeding, bleeding gums, petechiae, excessive blood system indicators, the survey were not found in the differences between the old and new campuses exist statistical significance (P gt; 0.05). Four indicators of sleep difficulties, irritability, hair loss, and decreased resistance to the old campus of the surveyed object, female-positive rate was significantly higher than men, the difference was statistically significant (P lt; 0.05), the differences of men and women of the new campus not statistically significant. (C) old and new campus standardized score of neurobehavioral function test results of the survey, only a test differences digit span was statistically significant (P <0.05), the new campus of the test standard score is significantly higher than the old campus . (D) a blood test found 18 indicators 7 10 difference between the average of the old campus of indicators above the new campus three indicators, lower than the average of the old campus of the new campus, new and old campus of two groups of test results of the differences were statistically significant (P <0.05). Conclusion: (a) the average of the new campus of 900 to 1900MHz frequency paragraph electromagnetic radiation, outdoor and indoor electric field strength and composite power density than the low level of the old campus, which may be the top of a building with the old campus several small mobile communications base station. (B) of the old and new campus survey results suggest that 900 ~ 1900MHz band electromagnetic radiation may produce a certain degree of the private prosecution symptoms of the nervous system of the exposed population health effects, the women in these areas may be more likely than men to be affected; while nasal bleeding blood system indicators, the survey were not found in the old and new campuses differences, and that they did not have a significant impact for the blood system symptoms. (C) neurobehavioral function test, digit span the new the Old Campus differences prompted score 900 ~ 1900MHz band electromagnetic radiation might be exposed to the crowd hearing a certain impact of retain memory capacity. The difference of 10 indicators (d) blood indicators detect red blood cell count of 900 to 1900 MHz electromagnetic radiation exposure may also produce different levels of exposure to the peripheral blood cells.

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