Research of Gamma Radiation Impact on Motor Fuels from Azerbaijan Oil
Issue:
Volume 6, Issue 1, March 2020
Pages:
1-6
Received:
3 September 2019
Accepted:
28 January 2020
Published:
8 April 2020
Abstract: In connection with the opportunity to develop new technological processes with the use of radioactive energy, it is necessary to study the effect of various types of radiation on hydrocarbons and oil products. The process of radiolysis is complex and diverse. The conversion mechanism of fuel hydrocarbons is still studied by not enough. These changes can vary widely - from the changes in individual working properties of fuel to its complete destruction. At the same time, practice requires testing materials for radiation resistance in order to determine the limits of their applicability and the possibility to use radiation as a technological factor for improving the properties of materials. As the object of study used samples of gasolines fuels AI-92, AI-95 and diesel fuel. Laboratory researches were conducted on gamma source Со60 at the power of dose of P=0.18 Gy/s, at the room temperature and at various absorbed doses D=15-150 KGy. Investigated impact of radiation on operational characteristics of fuels is in static conditions before and after irradiation. Results of such researches allow estimating radiation stability of fuels, to find out influence of radiation on the general composition of fuels and possible changes of fuels qualities.
Abstract: In connection with the opportunity to develop new technological processes with the use of radioactive energy, it is necessary to study the effect of various types of radiation on hydrocarbons and oil products. The process of radiolysis is complex and diverse. The conversion mechanism of fuel hydrocarbons is still studied by not enough. These change...
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Concentration of Radon in Indoor Air in Lalibela, Ethiopia
Issue:
Volume 6, Issue 1, March 2020
Pages:
7-11
Received:
28 November 2019
Accepted:
25 December 2019
Published:
14 April 2020
Abstract: The second largest cause of lung cancer is related to radon (222Rn) and its progenies in our environment. Building materials, such as concrete, contribute to the production of radon gas through the natural decay of 238U from its constituents. This Radon has been recognized as one of the major contributor to the natural radiation and health hazards in the human dwellings. Even lung cancer is expected if it is present in enhanced levels beyond maximum permissible (acceptable) limit. This thesis reports the measurements of indoor radon concentration in the Lalibela dwellings of the Amhara region in Northern Ethiopia using the cellulose nitrate (LR-115 type-II) plastic track detectors. Eleven cellulose nitrate films (LR-115 SSNTD) were distributed over the study area dwellings according to the fraction of the population. The exposure time was started from February 21/2013 and lasted for 90 days. It is found that the values of radon concentration vary from 52.45 to 353.95 Bqm-3 with the average value of 140.64 Bqm-3. The effective dose rates have been calculated and found to vary from 1.38 to 9.34 mSvy-1 with over all mean value of 3.71 mSvy-1. It is also found that mud houses (houses use unbaked bricks) have relatively lower indoor radon as compared to the houses which are made of the baked bricks and cement.
Abstract: The second largest cause of lung cancer is related to radon (222Rn) and its progenies in our environment. Building materials, such as concrete, contribute to the production of radon gas through the natural decay of 238U from its constituents. This Radon has been recognized as one of the major contributor to the natural radiation and health hazards ...
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