Showing 5 results for Kakooei
H Kakooei , M Sameti ,
Volume 1, Issue 4 (8 2003)
Abstract
This study has been done in a raajor brake-shoe factor.'. Air samples were taken and dustlevels determined according to OSHA code, revealing a dust load in weighting and shootingsaloons ranging from 2 to 16.88 mg/nr Measurement and counting of asbestos fibers weredone using OSHA ID 160/ code and permissible exposure levels.
Asbestos fiber counts in sampled areas were higher than the time weighted average level(TWA) and even higher than action level.Particle size distribution was also determined. It turned out that of the 3000 counted particles,%90 of non-fibers and %10 are fiber-shaped. Also size of %60.4 of counted fibers is lowerthan 10 x that %80 of them are fibers.The results of this study showed significantly thai the maximum pollution loads occur in theweighting section, especially in the mixers. Heavy pollutant load. low air flow (face velocity)and use of canopies with the lowest enclosure may be regarded as potential mechanisms.
H Kakooei , A.h Poornajaf ,
Volume 4, Issue 2 (3 2006)
Abstract
Background and Aim: Lack of quantitative and qualitative data on the current status and the possible adverse effect of poor illumination necessitate the evaluation of the illumination system in the industrial section.
To perform quantitative and qualitative assessments of illumination conditions in factories located in the west of Tehran and to look at the adverse consequences of insufficient illumination.
Materials and Methods: Data were collected through objective measurements and interviews with 616 factory workers. We used a structured questionnaire for data collection.
Results: Out of the total number of work sites inspected, 19.8% sufficient illumination, 46.1% had moderate illumination, and 29.7% work sites had illumination levels considered to be inadequate for precise tasks. Among those who worked in places with moderate illumination, 56.7% belonged to the 16-20 years age group 86.7% of individuals within this age group had to perform very precise tasks. Besides, 46.4% of the female workers and 45.7% of the males worked in places with moderate illumination .Work site observations and interviews revealed that those working under moderate and insufficient light commonly inhaled hazardous fumes and suffered from headaches and glare.
Conclusion: Factory work entails a variety of visual tasks. Besides creating a pleasant working environment, illumination of the workplace should provide sufficient amounts of light, visibility, luminance and contrast.
Z Zamanian Ardakani, H Kakooei, M Ayattollahi, Sm Karimian, G Nasle Seraji,
Volume 5, Issue 4 (5 2008)
Abstract
Background and Aim: There are no occupational health data concerning the prevalence of mental disorders in Iranian hospital nurses. Such information may be a prerequisite for efficient occupational mental health interventions. The aim of this study was to determine mental health status among shift work hospital nurses.
Materials and Methods: This paper reports the findings of a cross-sectional survey that was part of a larger quasi-experimental study. We selected and evaluated 1195 nurses in 12 general hospitals in Shiraz (capital of Fars Province), using the 28-item version of the General Health Questionnaire (GHQ). We used structured observations in accordance with an occupational health checklist to assess working environment during the work period.
Results: Results indicated that 28.7% of nurses were in poor mental health. Mental disease was more common among females than males (p<0.05). Prevalence rates for anxiety and somatic symptoms were 42.2% and 35.5% respectively. The prevalence of depression was 11.9% and social dysfunction, 79.5%. There was a significant relationship between shift work and anxiety as well as sleep disorders (p< 0.05). Associations were also found between marital status and depression and between gender and social dysfunction (p< 0.001).
Conclusion: Prevalence figures for mental disorders are similar to those from nationwide surveys but it seems that social dysfunction and anxiety disorders are more common in nurses compared to the general population aged 15 and over. More attention must be paid to the health of shift work nurses (especially female staff). This can take the form of shift work health education programs, occupational health counseling, and periodic examinations.
Yousef Mohammadian, Seyed Jamaledin Shahtaheri, Ali Akbar Sabour Yaraghi, Hossein Kakooei, Mohammad Hajaghazadeh,
Volume 10, Issue 4 (18 2013)
Abstract
Background and aim: In this study the cytotoxicity to human epithelial lung cells of single-walled carbon nanotubes, multi-walled carbon nanotubes and chrysotile was compared based on the following cytotoxicity indices: no observable adverse effect concentration (NOAEC), inhibitory concentration 50 (IC50), and Total Lethal Concentration (TLC).
Materials and Methods: Human epithelial lung cells were exposed to different concentrations (1 to 1500 µg/ml) of carbon nanotubes and chrysotile for 6 and 24 hours. Cytotoxicity was assessed using the MTT assay. NOAEC, IC50, and TLC idices were determined by probit analysis.
Results: The results showed statistically significant correlations (p<0.001) between cytoxicity and exposure concentration in the case of all the three compounds. The NOAEC and IC50 indices were lowest for the multi-walled carbon nanotubes, while the single-walled carbon nanotubes showed the lowest TLC index.
Conclusion: Cytotoxicity of multi-walled carbon nanotubes at low concentrations was higher than that of single-walled carbon nanotubes and chrysotile. This would mean that exposure to this compound occurs at low concentrations. Thus, cytotoxicity of multi-walled carbon nanotubes is a cause for concern. It can be concluded, then, that, like chrysotile fibers, crabon nanotubes are also considerably toxic to human epithelial lung cells.
Mohammad Javad Golhosseini, Hossein Kakooei, Jamaleddin Shahtaheri, Kamal Azam,
Volume 13, Issue 1 (6-2015)
Abstract
Background and Aim: Motor vehicles are an absolute necessity used extensively in all countries of the world. They are a major cause of air pollution with highly undesirable consequences. Thus, exposure to traffic pollution is a growing public health concern. Several studies indicate that people in the cabin of a vehicle inhale air with high concentrations of pollutants such as nitrogen oxides(NOx), particulate matter (PM), volatile compounds (VOCs) and carbon monoxide (CO).
Materials and Methods: Eexposure of drivers inside motor vehicles to CO was assessed during one year in Tehran, Iran. For this purpose, the concentration of CO was measured in the breathing zone of 72 male taxi drivers using a portable real-time instrument equipped with electrochemical sensors. In addition, records of fixed air pollution monitoring stations in Tehran were examined and the CO concentration in those records were compared with those measured in the taxis.
Results: The mean in-vehicle CO concentration was 19.91 ± 4.37ppm, while records of fixed air pollution monitoring stations showed the concentration of this pollutant in the air to be 3.69 ± 1.03ppm.
Conclusion: It can be concluded that factors such as traffic density, weather conditions and vehicles lifespan affect the extent of exposure of taxi drivers to carbon monoxide.
