scholarly journals Determination of Safe Benzene Concentration at Ciputat Gas Station

2020 ◽  
Keyword(s):  
Benzene Concentration ◽  
Gas Station

scholarly journals Determination of The Permissible Distances in Vicinity of The Gas Station According to The Concentration of Benzene

2021 ◽  
Author(s):  
Maryam Chehrehei ◽  
Seyed Alireza Hajiseyed Mirzahosseini ◽  
Nabiollah Mansouri ◽  
Mohammad Hassan Behzadi ◽  
Yousef Rashidi
Keyword(s):  
Linear Regression ◽  
Storage Capacity ◽  
Petroleum Products ◽  
Regression Equation ◽  
Emission Source ◽  
Storage Tanks ◽  
Linear Regression Equation ◽  
Gas Stations ◽  
Gas Station

Abstract Benzene is considered a toxic and hazardous pollutant in Tehran metropolis. The storage tanks of petroleum products and refueling in gas stations are among the main sources of benzene emissions. Using the software AERMOD and reviewing the benzene dispersion maps at different distances from 412 storage tanks at 148 gas stations, it was found the permissible distance of the emission source is dependent on various variables such as the number of loading times and the storage capacity. When, storage capacity in the range of 60,000 L to 96,000 L and the number of loading is in the range of 676 to 1,328 times a year, the concentration of benzene at a distance of 30 m of the emission source reaches the annual standard of 5 μg/m3. While, storage capacity in the range of 80,000 L to 128,000 L and the number of loading is in the range of 1,329 to 1,834 times a year, the concentration of benzene at a distance of 40 m of the emission source reaches the annual standard of 5 μg/m3. Also, based on the analysis of data and the linear regression equation, the permissible distance of the emission source can be predicted.

scholarly journals Determination of Carcinogenic Toluena Detox Mass In Printing Industrial Workers In Surabaya

2020 ◽  
Author(s):  
Rista Novianti ◽  
abdul rohim tualeka ◽  
Ng Yee Guan
Keyword(s):  
Body Weight ◽  
Threshold Value ◽  
Printing Industry ◽  
Industrial Workers ◽  
Cross Sectional ◽  
Beef Liver ◽  
Toluene Concentration ◽  
Work Duration ◽  
Benzene Concentration

Abstract Background This study aims to calculate the intake of foods rich in CYP2E1 enzymes and glutathione to increase toluene detoxification. Methods The research design used was a cross sectional method. The research location is printing industry in Surabaya, East Java. The number of respondents was 30 workers of the printing industry. The calculated variables included body weight, work duration (years), work frequency per week (days), average workday (hours) of the respondent and benzene concentration. After all variables were obtained, respiration rate and carcinogenic detox benzene food intake per respondent were determined. Results All respondents who were at work showed benzene concentrations below the threshold value (TLV). Foods containing CYP2E1 enzyme included beef liver, salmon and fish oil while food with glutathione included grapes, avocados and asparagus. Conclusion Adequacy levels of CYP2E1 enzymes and glutathione are different and varied. The effective dose required by each respondent depends on body weight, length of work, and toluene concentration at work. In sum, the greater the toluene concentration, the greater the dietary needs which are rich in enzymes and CYP2E1 glutathione. Each respondent can choose benzene detox food depending on their needs and appetite.

scholarly journals Determination of Safe Benzene concentration at Kebon Jeruk Toll Gate Keeper Jakarta indonesia

2019 ◽  
Vol 10 (9) ◽  
pp. 976
Author(s):  
Danang Setia Budi ◽  
Abdul Rohim Tualeka ◽  
Pudji Rahmawati ◽  
Syamsiar S Russeng ◽  
Bambang Wispriyono
Keyword(s):  
Benzene Concentration

Fuel Purchase System and Determination of Nearest Gas Station Locations Using the Haversine Method

2021 ◽  
Author(s):  
ABDURRASYID ABDURRASYID ◽  
MEILIA SUSANTI ◽  
INDRIANTO INDRIANTO
Keyword(s):  
Gas Station

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

Sign in / Sign up

Export Citation Format

Share Document