Showing 5 results for Rezvani
N Jaafarzadeh Haghighi Fard, S Salamat, Z Rezvani, M.a Behrooz,
Volume 2, Issue 3 (25 2009)
Abstract
Backgrounds and Objectives: As industries are developed, human uses of the energy in the huge scale and release the loss energy in the form of electromagnetic radiation such as infrared into the environment, that it could affect on the man health. According to the available standards, if the IR-A could be controlled and consequently health of workers could be provided, it would reduce the total industrial expenses.
Materials and Methods: To control this radiation, it is necessary to measure it and compare the results with the available standards. Hence, in this study, we try to measure this radiation in a unit of industy. For this porpuse the unit of steel company that settled in southeast of ahvaz is selected.
Results: The determinations were done every month during one year in all selected units. These results are compared with the available standards, and finally the differences are statistically evaluated by some suitable statistical methods. For measuring the dispersal of ray in the diffrent height. bat hard data compared with ACGIH standard and SPSS software is used for changing Radiation.
Conclusion: The average amount of IR-A at this industrial unit is 1.18 mW/cm2 which is more than the standard value in such industries ,and based on our fouding the natural solar source of this radiation increases such effects in out-door work places.
M Rezvani, S Tabibian, A Veisi,
Volume 12, Issue 4 (2-2020)
Abstract
Background and Objective: This study was designed to assess the safety and health risk in Ilam gas refinery and evaluation of TOPSIS method performance in risk assessment.
Materials and Methods: After identifying 955 hazards case, the risks were ranked separately in the health and safety sectors using criteria such as exposure level, severity and probability of the occurrence and use TOPSIS multi-criteria evaluation method. Due to the impossibility of determining the level of risk using TOPSIS method, the FEMA method was used for this purpose, and the risk number (RPN) options was calculated.
Results: In the field of safety assessment, personal injury, financial, burns and death from fire due to storage flammable materials in the warehouse, with a similarity to the ideal solution (Cli) of 0.56 was identified as the highest risk. In assessing the health risk, poisoning and impact on the health of employees caused by microbial agents due to the use of expired food in cooking in the restaurant unit as well as respiratory injuries of drivers due to inhalation and gas leakage in the process area and traffic of drivers in the site Cli = 0.66 was identified as the highest risk.
Conclusion: TOPSIS, as a new approach, is capable of being used in the industry's risk ranking and assessment. All the risks were placed at a moderate to low level. Despite the necessity of determining the measures to control the risks, these risks were not an emergency.
Mohammad Rezvani Ghalhari, Faezeh Asgari Tarazooj, Mohammad Bagher Miranzadeh, Gholamreza Mostafai, Safa Kalteh,
Volume 13, Issue 3 (11-2020)
Abstract
Background and Objective: Vegetables are an essential part of our diet and a major dietary exposure route to heavy metals. Therefore, this study aimed to investigate the concentration and potential health hazards of heavy metals in the vegetables sold in Kashan markets.
Materials and Methods: 4 types of widelyraw-consumed vegetables, including parsley, coriander, basil, and fresh chives, were investigated in this study. Questionnaires were randomly given to individuals to determine vegetable consumption rate. Heavy metal were quantified using inductively coupled plasma- optical emission spectroscopy. Monte-Carlo Simulation was utilized to identify the associated health risks.
Results: Among tested heavy metals, Pb showed the highest concentration in parsley (4.8 ± 0.98 µg/g), coriander (3.8 ± 1.3 µg/g) and basil (3 ± 0.94 µg/g). Cr levels in fresh chives (2.8 ± 1.6 µg/g) was higher than other heavy metals. Also, the highest total hazard quotient values among examined heavy metals (Taking into account 95% confidence interval) were found for Pb (0.7), Cr (0.39), and Pb (1.034) in coriander, basil, and fresh chives, respectively.
Conclusion: Cr and Pb concentrations were generally beyond WHO/FAO guidelines in the samples. The THQ value for Pb in parsley was greater than 1, suggesting elevated adverse health effects due to parsley consumption.
Mohammad Rezvani Ghalhari, Benyamin Ajami, Esfandiar Ghordouei Milan, Moein Khalooei, Amir Hossein Mahvi,
Volume 14, Issue 4 (3-2022)
Abstract
Background and Objective: Groundwater is the primary water source for drinking and agricultural activities in arid and semi-arid regions. Rainfall, land use, geological structure, aquifer mineralogy, and duration of water contact with the environment in the basement are the main factors affecting the chemical quality of groundwater. This study aimed to determine the physicochemical properties of groundwater by considering the water quality index (WQI) and its quality assessment for drinking water.
Materials and Methods: In this study, 71 wells of Kashan were sampled in summer 2020 with three samplings from each well, and physical and chemical parameters were studied, water quality index was determined using mathematical methods, and Pearson correlation coefficient was determined. Correlation analysis was used. Finally, the collected data were analyzed using SPSS-16 software, Excel 2013, and statistical tests.
Results: The calculated WQI of 71 wells in Kashan shows that 67% of the wells were of excellent quality, and 33% were of good quality in terms of water quality parameters. In total, out of 71 samples, the numerical index of water quality was 44.94, and the water was of excellent quality.
Conclusion: The results show that ions such as sodium, sulfate, and chlorine are directly related to the counting in an area and increase the concentrations of EC and TDS, and can impair the balance of anionic and cationic aqueous solution. It was also found that more than half of the wells have excellent quality due to using water wells for drinking.
Ahmad Mehri, Mohammad Rezvani Ghalhari, Ashraf Mazaheri-Tehrani, Parnia Bashardoust, Majid Mohammadi, Rouhullah Dehghani,
Volume 16, Issue 3 (12-2023)
Abstract
Background and Objective: Smoking is one of the biggest public health problems in the world, which can increase the overall burden of disease in the world. Since understanding the factors related to smoking among medical students is considered an important and necessary factor for formulating and explaining educational intervention programs, therefore, this study was conducted determine the prevalence of smoking among students of Kashan University of Medical Sciences and the factors related to it.
Materials and Methods: This cross-sectional study was conducted on 681 students of Kashan University of Medical Sciences in the first semester of 2018 by simple random sampling. Smoking in individuals, family, close friends, and other demographic characteristics was measured using a questionnaire with good reliability and multiple logistic regression was used for statistical analysis.
Results: The average age of the participants in this study (313 male and 368 female students) was 25 ±4.2 years old. The prevalence of smoking among students was 9.4% (16.7% in boys and 3.35% in girls). Also, smoking had a significant relationship with the desire to smoke, living in a dormitory, having close friends who smoke, and family members with a history of smoking (p<0.05).
Conclusion: The academic drop of students who smoke is significantly higher than other students. Since this study has shown the factors related to smoking in students, the use of these findings can be a basis for the prevention of smoking and the development of preventive interventions.
