scholarly journals Factors affecting mutational specificity induced by ionizing radiation and oxidizing radicals. Progress report

1992 ◽  
Author(s):  
B. Strauss
Keyword(s):  
Ionizing Radiation ◽  
Progress Report ◽  
Factors Affecting ◽  
Mutational Specificity

Hygienic assessment of learning environment conditions (by the example of higher educational institutions of the city of Ufa)

2020 ◽  
Vol 99 (4) ◽  
pp. 405-411
Author(s):  
Elena Ju. Gorbatkova
Keyword(s):  
Ionizing Radiation ◽  
Educational Institutions ◽  
Higher Educational Institutions ◽  
Factors Affecting ◽  
Republic Of Bashkortostan ◽  
Average Relative Humidity ◽  
Higher Educational ◽  
The Republic ◽  
And Performance ◽  
The City

Introduction. The important factors affecting health and performance of young people are the conditions of education, in particular, a comfortable microclimate in the classrooms of higher educational institutions. Materials and methods. In view of the urgency of this problem, an analysis was made of the microclimate parameters of educational organizations of different profiles (Ufa city, the Republic of Bashkortostan). 294 classrooms were studied in 22 buildings of 4 leading universities in Ufa. A total of 3,822 measurements were taken to determine the parameters of the microclimate. The analysis of ionizing radiation in the aerial environment of classrooms. There was performed determination of radon and its affiliated products content. In order to assess the conditions and lifestyle of students of 4 higher educational institutions of the city of Ufa, we conducted an anonymous survey of 1,820 students of I and IV years of education. Results. The average temperature in the classrooms of all universities studied was 23.9±0.09 C. The average relative humidity in all classrooms was 34.2 ± 0.42%. Analysis of ionizing radiation (radon and its daughter products decay) in the aerial environment of the classrooms and sports halls located in the basement determined that the average annual equivalent equilibrium volumetric activity of the radon daughter products (EROA ± Δ222Rn) ranged from 28 ± 14 to 69 ± 34.5 meter, which meets the requirements established by SanPiN. Conclusion. The hygienic assessment of the microclimate parameters of educational institutions of various profile revealed a number of deviations from the regulated norms. The results indicate the need to control the parameters of the microclimate, both from the administration of universities, and from the professors. According to the results of the study, recommendations were prepared for the management of higher educational institutions in Ufa.

scholarly journals HYGIENIC EVALUATION OF ILLUMINATION INDICES AND NON-IONIZING RADIATION AT EDUCATIONAL SITES OF HIGH SCHOOLS

2020 ◽  
Vol 99 (2) ◽  
pp. 152-157
Author(s):  
Elena Yu. Gorbatkova ◽  
T. R. Zulkarnaev ◽  
Z. A. Khusnutdinova ◽  
U. Z. Ahmadullin ◽  
A. A. Kazak ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Educational Institutions ◽  
Educational Organizations ◽  
Higher Educational Institutions ◽  
Factors Affecting ◽  
Republic Of Bashkortostan ◽  
Higher Educational ◽  
The Republic ◽  
The Government ◽  
Made In

One of the significant factors affecting the condition of the students’ visual apparatus is an illumination level in the premises of educational organizations. Electromagnetic radiation arising from computers also has an essential influence on a state of health. Taking into account the urgency of this problem, an analysis of illumination indices and EM radiation was made in audiences of higher educational institutions of various profiles (Ufa, the Republic of Bashkortostan). The total number of illumination measurements was 3528. The measurement methods met the requirements of the interstate standard. According to the results of the illumination indices estimation in the studied universities, a significant deviation from the regulated norms was revealed: in 71.5% of the measurements the index was below the norm. It should be noted that indices differed significantly depending on the type of educational organization. The best situation is in the “Financial University under the Government of the Russian Federation,” where only 13.3% of the measurements are inconsistent with the normative indices. Pulsation coefficient also was determined. It turned out that 88.8% of the measurements do not correspond to the norm. The analysis of illumination measurements in computer classes was carried out. Only one-fifth of them in the computer table working area in the of the document placement corresponded to SanPin. An anonymous questionnaire was also organized for students from four leading universities in Ufa, the Republic of Bashkortostan. According to respondents’ answers, out of seven students, one was revealed to be suffering from myopia. On the basis of “Center for Hygiene and Epidemiology in the Republic of Bashkortostan”, a study of non-ionizing radiation from video terminals located in computer classes was made. 1145 measurements were made in 20 buildings of four universities studied. It was found out that the intensity of the electrostatic field did not meet the requirements of SanPiN in 5.7% of the measurements. Hygienic assessment of the environment of educational organizations of various profiles revealed a number of significant deviations from the regulated norms. The obtained results testify to the need to monitor the illumination and EMR indices both from the administration of higher education institutions and from teachers. Based on the results of the study, recommendations were prepared for the management of higher educational institutions in Ufa.

Understanding and Mitigating Under-Deposit Corrosion in Large Diameter Crude Oil Pipelines: A Progress Report

2008 ◽  
Author(s):  
T. D. Place ◽  
Michael R. Holm ◽  
Colin Cathrea ◽  
Tom Ignacz
Keyword(s):  
Bacterial Species ◽  
Large Diameter ◽  
Progress Report ◽  
Solid Particles ◽  
Test Method ◽  
Internal Corrosion ◽  
Factors Affecting ◽  
Transmission Pipeline ◽  
Emulsified Water ◽  
Batch Treatment

This paper is an exploration of factors affecting internal corrosion of transmission pipeline systems (<0.5% S&W), as well as a progress report on research aimed at improving chemical mitigation of this threat in heavy oil product streams. Typical pipeline corrodents and corrodent transport mechanisms are explored. Transmission quality hydrocarbon products are shown to carry micro-emulsified water, various solid particles, solid particles with micro-attached water, and bacteria. While micro-emulsified water can be considered benign owing its ability to be transported harmlessly without accumulation; water-wetted solid particles have sufficient density to reach the pipe floor. Patterns of internal corrosion on a transmission pipeline are used to demonstrate the significance of solids accumulation leading to under-deposit corrosion. Analysis of pipeline sludge reveals significant populations of different bacterial species indicating the existence of a robust biomass capable of creating or sustaining a corrosive environment. Corrosivity testing of pipeline sludges was performed using two static autoclave coupon methods. One test method demonstrated that the addition of chemical inhibitor directly to the pipeline sludge could reduce corrosion rates as effectively as batch treatment of a clean coupon. A rotating mechanical contactor was designed and built to facilitate the blending of corrosion inhibitor with pipeline sludge under ‘like-pipe’ flow conditions, but results of sludge corrosivity testing using this device are not yet available.

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