Zohreh Fazli - Academia.edu (original) (raw)
Papers by Zohreh Fazli
Journal of Education and Community Health, 2020
Epidemiological and clinical characteristics of 99 cases of 2019 novel ... [8] Identification of ... more Epidemiological and clinical characteristics of 99 cases of 2019 novel ... [8] Identification of a novel coronavirus in patients ... [9] A report on the latest situation of the Coronavirus ... [10] Psychological responses, behavioral changes and public perceptions during the early phase ... [11] Factors associated with preventive behaviours of COVID-19 among hospital staff in ... [12] The role of perceived mental stress in the ... [13] MERS transmission and risk ... [14] Timely mental health care for the 2019 novel ... [15] Prediction of preventive behaviors of the needlestick injuries during surgery among ...
Introduction: Stress is a factor which can reduce the quality and quantity of life. Librarians, D... more Introduction: Stress is a factor which can reduce the quality and quantity of life. Librarians, Due to the nature of their job, may be unable to respond to the needs of the causes of occupational stress. The aim of this study was to examine the relationship between job stress and quality of life of Librarians in Shahid Sadoughi University of medical sciences in Yazd. Methods: This descriptive analytic study carried on 38 librarians. All Librarians enrolled in the study. The data collection tools to measure the quality of life and job stress were SF_36 and HSE questionnaires, respectively. Results: Out of total of 38 subjects who entered the study, 25 (8/65%) were female and 13 (2/34%) were male. The findings showed that the mean quality of life is 54/17 ± 95/69 and the mean job stress is 2.74±0.41. Pearson correlation test showed a significant and inverse relationship between job stress and quality of life in employees (r=-0.374, P = 0.011). Conclusion: Our results showed that stres...
Air Pollution and Health, Mar 29, 2018
Introduction: Sleep restores the human's body. Some factors such as stress, noise and vibration c... more Introduction: Sleep restores the human's body. Some factors such as stress, noise and vibration can lead to sleep disorder and hormone imbalance. The purpose of this paper is to study the effect of exposure simultaneously to noise and vibration on sleep disorders of workers in Kerman Motor manufacturing industry. Materials and methods: Analytical descriptive research was done on 200 workers by simple random sampling. The control group has been demographically matched up with the sample group. The standards for samples of this research were workers who are nonsmokers; nonusers of caffeine, soporific or tranquilizer; and do not have special diseases. Sampling was done by sound level meter, oscillator, demographical and sleep disorder information questionnaire. Results: The exposure to noise and vibration is more than permitted amount. The control group and sample group, are all healthy people with no records of disease or tranquilizer medicine consumption. Conclusions: The results have shown that the exposure to noise and vibration, affects the quality of workers' sleep. Therefore, solutions to decrease noise and vibration in factory should be considered.
Irtiqā-yi īminī va pīshgīrī az maṣdūmiyat/ha (i.e.,Safety Promotion and Injury Prevention), 2016
Background and Objectives: Millions of workers in the production or using of different chemicals ... more Background and Objectives: Millions of workers in the production or using of different chemicals such as melamine formaldehyde resin are exposed by formaldehyde. In spite of Widespread formaldehyde usage, there are too concerns about its toxicity effects. This study aimed to assess the workers occupational exposure to formaldehyde in some melamine production workshops and blood factors change in the exposed workers. Materials and Methods: This cross-sectional study was performed on 66 workers in Tehran. 40 melamine manufactures workers as exposed group and 26 food industry workers as unexposed group was selected. Occupationally exposure to formaldehyde was assessed by NIOSH 3500 method. Hematological parameters including White Blood Cell, Red Blood Cell, Platelet Count, Lymphocytes Percent and Volume of Red Blood Cells was evaluated. Ethical considerations in this study were adhered based on the Helsinki guidelines. Results: occupationally median exposure to formaldehyde in melamine manufactures was evaluated 0.0896 ppm (0.03-0.2ppm), which is lower than the permitted ceiling limit (TLVc =0.3ppm) in Iran and more than the NIOSH threshold exposure limit (TWA= 0.016 ppm).The results show, in exposed group, workers with unmoral count of white and red blood cells are significantly higher than unexposed people. Conclusion: Occupationally exposure to formaldehyde cause adverse effects on the hematopoietic system. Exposures to formaldehyde in the concentration lower than approved standard limit in Iran probably induce toxicity effect on the blood cells. Because of the few number of people surveyed in this study, broader studies suggested. In addition assessing blood cells, more specific tests are necessary to evaluate the toxicity effect of formaldehyde on the blood.
Journal of Health, Oct 10, 2017
Background & objectives: Job satisfaction is an individuals attitude to his/her job. On the other... more Background & objectives: Job satisfaction is an individuals attitude to his/her job. On the other hand psychological distress and burnout can negativly affect job satisfaction and productivity. This study was designed to determine association between burnout, productivity and job satisfaction among personels of a hospital. Methods: In this descriptive-analytical study, 100 employees of hospitals were selected using stratified randome sampling method. Data collection tools included productivity questionnaire, Maslach burnout and job satisfaction questionnairs. Data analysis was done by descriptive methods, regression, and correlation using SPSS20 statistical software. Results: The mean score of job satisfaction was 55.7±7.52, which reflects high level of job satisfaction in this society. Correlation test results of Job satisfaction and productivity showed significant correlation between job satisfaction and subscales of ability, understanding, credibility and total score of efficiency (p<0.05). Job satisfaction significantly correlated to individual performance and inversely associated with emotional exhaustion and depersonalization subscales of burnout variable (intensity) (p<0.05). Conclusion: Considering the high level of job satisfaction, we recommend to focus on the factors that increase productivity and reduce burnout in hospital staffs.
Journal of Occupational Hygiene Engineering, Jun 10, 2015
Background & Objectives: Job burnout can reduce job performance and productivity. It is more comm... more Background & Objectives: Job burnout can reduce job performance and productivity. It is more common in workers who deal directly with people. This study was conducted to investigate the relationships between demographic variables, productivity, and job burnout in the personnel of a hospital. Methods: In this descriptive-analytical study, all 100 employees of a hospital in Ilam (Iran) were evaluated using a demographic questionnaire, the Maslach Burnout Inventory (MBI), and a productivity questionnaire were studied. Data analysis was performed using descriptive and inferential statistical tests. Results: Correlation analysis showed productivity to be significantly correlated with the frequency of emotional exhaustion and professional efficacy (two scales of the MBI). The highest scores in the emotional exhaustion and decreased professional efficacy scales of the MBI were observed in 41-50-and 20-30-year-old individuals, respectively. Education level had significant relations with depersonalization (a scale of the MBI) and productivity, i.e. while subjects with a Bachelor's degree had the highest depersonalization scores, the highest productivity scores belonged to individuals with postgraduate degrees. Furthermore, respondents who worked less than eight hours a day had significantly higher productivity. In addition, nurses and anesthesia personnel had the highest scores of depersonalization and productivity, respectively. Conclusion: Our findings indicated different levels of job burnout among the participants. Considering the adverse effects of job burnout on the health and productivity of the personnel and the quality of patient care, further research is required to identify the factors, especially organizational factors, leading to this phenomenon. Appropriate moderating and preventive measures can then be taken to minimize the incidence of job burnout.
RSC Advances, 2021
Gold nanoparticles (AuNPs) have diverse applications in the diagnosis and treatment of ailments. ... more Gold nanoparticles (AuNPs) have diverse applications in the diagnosis and treatment of ailments. This study describes an extremely simplified synthesis of AuNPs using antioxidant-rich pollen extract as a local natural source. Ultraviolet-visible (UV-vis) spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM) were used to characterize the synthesized AuNPs; strong UV-vis absorption at 534 nm confirmed their formation, the XRD pattern showed the presence of a crystalline structure, and TEM images showed them to be spherical nanoparticles with an average size of 9.3 AE 2.9 nm. As synthesized AuNPs remained stable for up to two months under laboratory conditions without any sedimentation or change in the absorption value, presumably due to the protection afforded by the capping agents from pollen. AuNPs revealed low toxicity effects on MCF-7 and HUVECs cell lines (with an IC 50 value of $400 mg mL À1 for both the cell lines). The proposed method did not use any hazardous materials or high-energy consuming devices; thus this efficient protocol may be adapted for large-scale production using local resources.
Electroanalysis, Feb 14, 2023
The current work aimed to fabricate a new cocaine sensor of octahedral palladium‐doped cobaltite ... more The current work aimed to fabricate a new cocaine sensor of octahedral palladium‐doped cobaltite composite (Oh‐Pd2+ : Co3O4‐C) using a simple hydrothermal protocol. As‐fabricated cocaine sensing approach was validated by various methods. Energy dispersive X‐ray analysis, X‐ray diffraction and scanning electron microscopy were recruited to characterize our charged modified composite. The electrode could sensitively detect cocaine, with a lengthy linear range (0.01 μM–900.0 μM) and a limit of detection (1.3 nM). The quantitative cocaine determination was achieved in the biological specimens using our modified electrode, the results of which displayed admirable outcomes.
Mathematical Problems in Engineering, Oct 12, 2021
Establishing an adequate level of reliability in the overhead crane operations is an important an... more Establishing an adequate level of reliability in the overhead crane operations is an important and vital principle to avoid undesirable consequences. To do this, it is appropriate to have a comprehensive approach for risk and reliability assessment of the most probable failure scenarios during overhead crane operations. In this study, fault tree analysis (FTA) in combination with fuzzy set theory, Bayesian network (BN), and Markov chain was used to evaluate the probability of top event and reliability of overhead cranes. A total of 47 basic events were identified for ladle fall in overhead cranes. e results showed that the probability of the ladle fall in the FT approach is equal to 0.0523035 and in the BN approach in the prior event is equal to 0.0273394 which is less than the FT method. Based on the values predicted by Markov chain, the reliability of the system decreases over time by 67.9% after 60 months. is study showed that the plan for ladle fall prevention should consider all influencing parameters identified by proper risk assessment methodologies.
Environmental Monitoring and Assessment, Oct 31, 2016
Over the years, neurotoxicity and cognitive dysfunction have separately been associated with endo... more Over the years, neurotoxicity and cognitive dysfunction have separately been associated with endogenous formaldehyde and reduction of acetylcholine signals. However, a limited number of studies have shown a relationship between cholinergic neurotransmitter and formaldehyde exposure. Therefore, the aim of this study was to assess the neurological effect on workers from melamine-dish preparation workshop, who were exposed to formaldehyde. A total of 35 formaldehyde-exposed workers were compared with 32 control employees from the food industry. Occupational exposure to formaldehyde was conducted using the National Institute of Occupational Safety and Health 3500 methods. Using the Ellman method, acetylcholinesterase (AChE) as a biomarker for neurotoxicity was analyzed in blood erythrocyte. The effects of alcohol dehydrogenase III (ADH3) and Mn-superoxide dismutase (Mn-SOD) polymorphism were used to survey the level of AChE activity. In this study, it was found that exposure to airborne formaldehyde increased from 0.024 to 0.74 ppm and the median personnel exposure was 0.057. Induction of AChE activity was observed in formaldehyde-exposed workers as compared with the control group (p < 0.01), while AChE activity increased in 64 % of the exposed subjects. Spearman's correlation (p < 0.02) was used to evaluate the association between AChE activity and occupational exposure to formaldehyde. Exposed subjects containing ADH3 2-2 genotype had higher AChE than others. The findings of this study suggest that the neurotoxic effect of formaldehyde depends on the AChE activity, which is affected by metabolism. It can be concluded that cholinergic signal reduction in cases of cognitive dysfunction could be associated with endogenous formaldehyde.
Work
BACKGROUND: Many occupational accidents annually occur worldwide. The construction industry injur... more BACKGROUND: Many occupational accidents annually occur worldwide. The construction industry injury is greater than the average injury to other industries. The severity of occupational accidents and the resulting injuries in these industries is very high and severe and several factors are involved in their occurrence. OBJECTIVE: Modeling important factors on occupational accident severity factor in the construction industry using a combination of artificial neural network and genetic algorithm. METHODS: In this study, occupational accidents were analyzed and modeled during five years at construction sites of 5 major projects affiliated with a gas turbine manufacturing company based on census sampling. 712 accidents with all the studied variables were selected for the study. The process was implemented in MATLAB software version 2018a using combined artificial neural network and genetic algorithm. Additional information was also collected through checklists and interviews. RESULTS: Me...
Journal of preventive medicine, May 10, 2016
International journal of occupational hygiene, Jul 30, 2020
The purpose of this study was to investigate character variations and its relationship with occup... more The purpose of this study was to investigate character variations and its relationship with occupational fatigue and involvement (labor participation) among employees in a melting unit at Sarcheshmeh Copper Complex. This crosssectional research was carried out on 145 employees of melting unit at Sarcheshmeh Copper Complex. A simple random sampling was used to collect data based on the three standard Hospital Anxiety and Depression Scale (HADS), Swedish Occupational Fatigue Inventory (SOFI), and Labor Participation (Job Involvement). One-way ANOVA, Pearson correlation coefficient and Spearman's correlation coefficient were used to analyze the data. The average age of the respondents was 38 ± 6.94 years and their average working experience was 10.46 ± 6.73 years. Among the personnel, (76%, n=111) had acute anxiety and (64%, n=93) had mild depression. The mean and standard deviation of job involvement for these subjects was 52.41 ± 7.12 (Desirable situation). There was a significant relationship among all aspects of fatigue including lack of energy, physical effort, lack of motivation, drowsiness (P <0.05) whereas the physical discomfort with job involvement did not show a positive relationship. The results indicated that there was acute anxiety, mild depression and high job involvement among the employees of melting unit.
Archives of Occupational Health, 2022
Background: Pool fire is a phenomenon caused by the leakage of flammable materials on the ground ... more Background: Pool fire is a phenomenon caused by the leakage of flammable materials on the ground leading to serious hazards, irrespective of its consequences. The proximity and high volumes of chemicals in warehouses require that the characteristics of various materials in warehouses be taken into account for calculating the chain effects of the pool fire. Methods: One of the effective parameters in expanding the impact of pool fire chain is heat flux value. There are different models for calculating and predicting it. In this study, two approaches of computational fluid dynamic (CFD), fire-driven fluid flow, fire dynamics simulator (FDS), and solid flame model were used to predict heat flux values. Results: In both models, the calculated heat flux was used to evaluate the effects on humans (first-degree burns, second-degree burns, and deaths) and the materials. The CFD results were compared with the results of the solid flame model, which indicated that there was little error in t...
Background and Objectives: Millions of workers in the production or using of different chemicals ... more Background and Objectives: Millions of workers in the production or using of different chemicals such as melamine formaldehyde resin are exposed by formaldehyde. In spite of Widespread formaldehyde usage, there are too concerns about its toxicity effects. This study aimed to assess the workers occupational exposure to formaldehyde in some melamine production workshops and blood factors change in the exposed workers. Materials and Methods: This cross-sectional study was performed on 66 workers in Tehran. 40 melamine manufactures workers as exposed group and 26 food industry workers as unexposed group was selected. Occupationally exposure to formaldehyde was assessed by NIOSH 3500 method. Hematological parameters including White Blood Cell, Red Blood Cell, Platelet Count, Lymphocytes Percent and Volume of Red Blood Cells was evaluated. Ethical considerations in this study were adhered based on the Helsinki guidelines. Results: occupationally median exposure to formaldehyde in melamine...
Air Pollution and Health, 2018
Introduction : Sleep restores the human’s body. Some factors such as stress, noise and vibration ... more Introduction : Sleep restores the human’s body. Some factors such as stress, noise and vibration can lead to sleep disorder and hormone imbalance. The purpose of this paper is to study the effect of exposure simultaneously to noise and vibration on sleep disorders of workers in Kerman Motor manufacturing industry. Materials and methods : Analytical descriptive research was done on 200 workers by simple random sampling. The control group has been demographically matched up with the sample group. The standards for samples of this research were workers who are nonsmokers; nonusers of caffeine, soporific or tranquilizer; and do not have special diseases. Sampling was done by sound level meter, oscillator, demographical and sleep disorder information questionnaire. Results : The exposure to noise and vibration is more than permitted amount. The control group and sample group, are all healthy people with no records of disease or tranquilizer medicine consumption. Conclusions : The results...
Introduction: Nowdays, mental workload is one of the most important issues in the workplaces.Vari... more Introduction: Nowdays, mental workload is one of the most important issues in the workplaces.Various factors affect the cognitive capacities of individuals which may lead to human errors. Due to the nature of the work and the use of tools and equipment in the tuna fish factory, the risk of accidents increases as a result of human error.The purpose of this study was to investigate the type of accidents and the relationship between the accidents and mental workload in the tuna fish factory. Methods: This cross-sectional and descriptive-analytical study was carried out on all of the 48 employees of the Zagros Parsian Factory. Nasa-Tlx questionnaire was used to collect data. Accident statistics were obtained through self-reported and recorded accident documents. Data were analyzed by SPSS software using t-test, linear regression, one-way ANOVA and Pearson correlation. Results: The results showed a significant relationship between sex and the rate of the accidents (P-Value<0.009). The...
Journal of Occupational Hygiene Engineering, 2015
Background & Objectives: Job burnout can reduce job performance and productivity. It is more comm... more Background & Objectives: Job burnout can reduce job performance and productivity. It is more common in workers who deal directly with people. This study was conducted to investigate the relationships between demographic variables, productivity, and job burnout in the personnel of a hospital. Methods: In this descriptive-analytical study, all 100 employees of a hospital in Ilam (Iran) were evaluated using a demographic questionnaire, the Maslach Burnout Inventory (MBI), and a productivity questionnaire were studied. Data analysis was performed using descriptive and inferential statistical tests. Results: Correlation analysis showed productivity to be significantly correlated with the frequency of emotional exhaustion and professional efficacy (two scales of the MBI). The highest scores in the emotional exhaustion and decreased professional efficacy scales of the MBI were observed in 41-50and 20-30-year-old individuals, respectively. Education level had significant relations with depe...
Mathematical Problems in Engineering, 2021
Establishing an adequate level of reliability in the overhead crane operations is an important an... more Establishing an adequate level of reliability in the overhead crane operations is an important and vital principle to avoid undesirable consequences. To do this, it is appropriate to have a comprehensive approach for risk and reliability assessment of the most probable failure scenarios during overhead crane operations. In this study, fault tree analysis (FTA) in combination with fuzzy set theory, Bayesian network (BN), and Markov chain was used to evaluate the probability of top event and reliability of overhead cranes. A total of 47 basic events were identified for ladle fall in overhead cranes. The results showed that the probability of the ladle fall in the FT approach is equal to 0.0523035 and in the BN approach in the prior event is equal to 0.0273394 which is less than the FT method. Based on the values predicted by Markov chain, the reliability of the system decreases over time by 67.9% after 60 months. This study showed that the plan for ladle fall prevention should conside...
RSC Advances, 2021
This method described herein does not need any sophisticated laboratory devices and deploy local ... more This method described herein does not need any sophisticated laboratory devices and deploy local resource.
Journal of Education and Community Health, 2020
Epidemiological and clinical characteristics of 99 cases of 2019 novel ... [8] Identification of ... more Epidemiological and clinical characteristics of 99 cases of 2019 novel ... [8] Identification of a novel coronavirus in patients ... [9] A report on the latest situation of the Coronavirus ... [10] Psychological responses, behavioral changes and public perceptions during the early phase ... [11] Factors associated with preventive behaviours of COVID-19 among hospital staff in ... [12] The role of perceived mental stress in the ... [13] MERS transmission and risk ... [14] Timely mental health care for the 2019 novel ... [15] Prediction of preventive behaviors of the needlestick injuries during surgery among ...
Introduction: Stress is a factor which can reduce the quality and quantity of life. Librarians, D... more Introduction: Stress is a factor which can reduce the quality and quantity of life. Librarians, Due to the nature of their job, may be unable to respond to the needs of the causes of occupational stress. The aim of this study was to examine the relationship between job stress and quality of life of Librarians in Shahid Sadoughi University of medical sciences in Yazd. Methods: This descriptive analytic study carried on 38 librarians. All Librarians enrolled in the study. The data collection tools to measure the quality of life and job stress were SF_36 and HSE questionnaires, respectively. Results: Out of total of 38 subjects who entered the study, 25 (8/65%) were female and 13 (2/34%) were male. The findings showed that the mean quality of life is 54/17 ± 95/69 and the mean job stress is 2.74±0.41. Pearson correlation test showed a significant and inverse relationship between job stress and quality of life in employees (r=-0.374, P = 0.011). Conclusion: Our results showed that stres...
Air Pollution and Health, Mar 29, 2018
Introduction: Sleep restores the human's body. Some factors such as stress, noise and vibration c... more Introduction: Sleep restores the human's body. Some factors such as stress, noise and vibration can lead to sleep disorder and hormone imbalance. The purpose of this paper is to study the effect of exposure simultaneously to noise and vibration on sleep disorders of workers in Kerman Motor manufacturing industry. Materials and methods: Analytical descriptive research was done on 200 workers by simple random sampling. The control group has been demographically matched up with the sample group. The standards for samples of this research were workers who are nonsmokers; nonusers of caffeine, soporific or tranquilizer; and do not have special diseases. Sampling was done by sound level meter, oscillator, demographical and sleep disorder information questionnaire. Results: The exposure to noise and vibration is more than permitted amount. The control group and sample group, are all healthy people with no records of disease or tranquilizer medicine consumption. Conclusions: The results have shown that the exposure to noise and vibration, affects the quality of workers' sleep. Therefore, solutions to decrease noise and vibration in factory should be considered.
Irtiqā-yi īminī va pīshgīrī az maṣdūmiyat/ha (i.e.,Safety Promotion and Injury Prevention), 2016
Background and Objectives: Millions of workers in the production or using of different chemicals ... more Background and Objectives: Millions of workers in the production or using of different chemicals such as melamine formaldehyde resin are exposed by formaldehyde. In spite of Widespread formaldehyde usage, there are too concerns about its toxicity effects. This study aimed to assess the workers occupational exposure to formaldehyde in some melamine production workshops and blood factors change in the exposed workers. Materials and Methods: This cross-sectional study was performed on 66 workers in Tehran. 40 melamine manufactures workers as exposed group and 26 food industry workers as unexposed group was selected. Occupationally exposure to formaldehyde was assessed by NIOSH 3500 method. Hematological parameters including White Blood Cell, Red Blood Cell, Platelet Count, Lymphocytes Percent and Volume of Red Blood Cells was evaluated. Ethical considerations in this study were adhered based on the Helsinki guidelines. Results: occupationally median exposure to formaldehyde in melamine manufactures was evaluated 0.0896 ppm (0.03-0.2ppm), which is lower than the permitted ceiling limit (TLVc =0.3ppm) in Iran and more than the NIOSH threshold exposure limit (TWA= 0.016 ppm).The results show, in exposed group, workers with unmoral count of white and red blood cells are significantly higher than unexposed people. Conclusion: Occupationally exposure to formaldehyde cause adverse effects on the hematopoietic system. Exposures to formaldehyde in the concentration lower than approved standard limit in Iran probably induce toxicity effect on the blood cells. Because of the few number of people surveyed in this study, broader studies suggested. In addition assessing blood cells, more specific tests are necessary to evaluate the toxicity effect of formaldehyde on the blood.
Journal of Health, Oct 10, 2017
Background & objectives: Job satisfaction is an individuals attitude to his/her job. On the other... more Background & objectives: Job satisfaction is an individuals attitude to his/her job. On the other hand psychological distress and burnout can negativly affect job satisfaction and productivity. This study was designed to determine association between burnout, productivity and job satisfaction among personels of a hospital. Methods: In this descriptive-analytical study, 100 employees of hospitals were selected using stratified randome sampling method. Data collection tools included productivity questionnaire, Maslach burnout and job satisfaction questionnairs. Data analysis was done by descriptive methods, regression, and correlation using SPSS20 statistical software. Results: The mean score of job satisfaction was 55.7±7.52, which reflects high level of job satisfaction in this society. Correlation test results of Job satisfaction and productivity showed significant correlation between job satisfaction and subscales of ability, understanding, credibility and total score of efficiency (p<0.05). Job satisfaction significantly correlated to individual performance and inversely associated with emotional exhaustion and depersonalization subscales of burnout variable (intensity) (p<0.05). Conclusion: Considering the high level of job satisfaction, we recommend to focus on the factors that increase productivity and reduce burnout in hospital staffs.
Journal of Occupational Hygiene Engineering, Jun 10, 2015
Background & Objectives: Job burnout can reduce job performance and productivity. It is more comm... more Background & Objectives: Job burnout can reduce job performance and productivity. It is more common in workers who deal directly with people. This study was conducted to investigate the relationships between demographic variables, productivity, and job burnout in the personnel of a hospital. Methods: In this descriptive-analytical study, all 100 employees of a hospital in Ilam (Iran) were evaluated using a demographic questionnaire, the Maslach Burnout Inventory (MBI), and a productivity questionnaire were studied. Data analysis was performed using descriptive and inferential statistical tests. Results: Correlation analysis showed productivity to be significantly correlated with the frequency of emotional exhaustion and professional efficacy (two scales of the MBI). The highest scores in the emotional exhaustion and decreased professional efficacy scales of the MBI were observed in 41-50-and 20-30-year-old individuals, respectively. Education level had significant relations with depersonalization (a scale of the MBI) and productivity, i.e. while subjects with a Bachelor's degree had the highest depersonalization scores, the highest productivity scores belonged to individuals with postgraduate degrees. Furthermore, respondents who worked less than eight hours a day had significantly higher productivity. In addition, nurses and anesthesia personnel had the highest scores of depersonalization and productivity, respectively. Conclusion: Our findings indicated different levels of job burnout among the participants. Considering the adverse effects of job burnout on the health and productivity of the personnel and the quality of patient care, further research is required to identify the factors, especially organizational factors, leading to this phenomenon. Appropriate moderating and preventive measures can then be taken to minimize the incidence of job burnout.
RSC Advances, 2021
Gold nanoparticles (AuNPs) have diverse applications in the diagnosis and treatment of ailments. ... more Gold nanoparticles (AuNPs) have diverse applications in the diagnosis and treatment of ailments. This study describes an extremely simplified synthesis of AuNPs using antioxidant-rich pollen extract as a local natural source. Ultraviolet-visible (UV-vis) spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM) were used to characterize the synthesized AuNPs; strong UV-vis absorption at 534 nm confirmed their formation, the XRD pattern showed the presence of a crystalline structure, and TEM images showed them to be spherical nanoparticles with an average size of 9.3 AE 2.9 nm. As synthesized AuNPs remained stable for up to two months under laboratory conditions without any sedimentation or change in the absorption value, presumably due to the protection afforded by the capping agents from pollen. AuNPs revealed low toxicity effects on MCF-7 and HUVECs cell lines (with an IC 50 value of $400 mg mL À1 for both the cell lines). The proposed method did not use any hazardous materials or high-energy consuming devices; thus this efficient protocol may be adapted for large-scale production using local resources.
Electroanalysis, Feb 14, 2023
The current work aimed to fabricate a new cocaine sensor of octahedral palladium‐doped cobaltite ... more The current work aimed to fabricate a new cocaine sensor of octahedral palladium‐doped cobaltite composite (Oh‐Pd2+ : Co3O4‐C) using a simple hydrothermal protocol. As‐fabricated cocaine sensing approach was validated by various methods. Energy dispersive X‐ray analysis, X‐ray diffraction and scanning electron microscopy were recruited to characterize our charged modified composite. The electrode could sensitively detect cocaine, with a lengthy linear range (0.01 μM–900.0 μM) and a limit of detection (1.3 nM). The quantitative cocaine determination was achieved in the biological specimens using our modified electrode, the results of which displayed admirable outcomes.
Mathematical Problems in Engineering, Oct 12, 2021
Establishing an adequate level of reliability in the overhead crane operations is an important an... more Establishing an adequate level of reliability in the overhead crane operations is an important and vital principle to avoid undesirable consequences. To do this, it is appropriate to have a comprehensive approach for risk and reliability assessment of the most probable failure scenarios during overhead crane operations. In this study, fault tree analysis (FTA) in combination with fuzzy set theory, Bayesian network (BN), and Markov chain was used to evaluate the probability of top event and reliability of overhead cranes. A total of 47 basic events were identified for ladle fall in overhead cranes. e results showed that the probability of the ladle fall in the FT approach is equal to 0.0523035 and in the BN approach in the prior event is equal to 0.0273394 which is less than the FT method. Based on the values predicted by Markov chain, the reliability of the system decreases over time by 67.9% after 60 months. is study showed that the plan for ladle fall prevention should consider all influencing parameters identified by proper risk assessment methodologies.
Environmental Monitoring and Assessment, Oct 31, 2016
Over the years, neurotoxicity and cognitive dysfunction have separately been associated with endo... more Over the years, neurotoxicity and cognitive dysfunction have separately been associated with endogenous formaldehyde and reduction of acetylcholine signals. However, a limited number of studies have shown a relationship between cholinergic neurotransmitter and formaldehyde exposure. Therefore, the aim of this study was to assess the neurological effect on workers from melamine-dish preparation workshop, who were exposed to formaldehyde. A total of 35 formaldehyde-exposed workers were compared with 32 control employees from the food industry. Occupational exposure to formaldehyde was conducted using the National Institute of Occupational Safety and Health 3500 methods. Using the Ellman method, acetylcholinesterase (AChE) as a biomarker for neurotoxicity was analyzed in blood erythrocyte. The effects of alcohol dehydrogenase III (ADH3) and Mn-superoxide dismutase (Mn-SOD) polymorphism were used to survey the level of AChE activity. In this study, it was found that exposure to airborne formaldehyde increased from 0.024 to 0.74 ppm and the median personnel exposure was 0.057. Induction of AChE activity was observed in formaldehyde-exposed workers as compared with the control group (p < 0.01), while AChE activity increased in 64 % of the exposed subjects. Spearman's correlation (p < 0.02) was used to evaluate the association between AChE activity and occupational exposure to formaldehyde. Exposed subjects containing ADH3 2-2 genotype had higher AChE than others. The findings of this study suggest that the neurotoxic effect of formaldehyde depends on the AChE activity, which is affected by metabolism. It can be concluded that cholinergic signal reduction in cases of cognitive dysfunction could be associated with endogenous formaldehyde.
Work
BACKGROUND: Many occupational accidents annually occur worldwide. The construction industry injur... more BACKGROUND: Many occupational accidents annually occur worldwide. The construction industry injury is greater than the average injury to other industries. The severity of occupational accidents and the resulting injuries in these industries is very high and severe and several factors are involved in their occurrence. OBJECTIVE: Modeling important factors on occupational accident severity factor in the construction industry using a combination of artificial neural network and genetic algorithm. METHODS: In this study, occupational accidents were analyzed and modeled during five years at construction sites of 5 major projects affiliated with a gas turbine manufacturing company based on census sampling. 712 accidents with all the studied variables were selected for the study. The process was implemented in MATLAB software version 2018a using combined artificial neural network and genetic algorithm. Additional information was also collected through checklists and interviews. RESULTS: Me...
Journal of preventive medicine, May 10, 2016
International journal of occupational hygiene, Jul 30, 2020
The purpose of this study was to investigate character variations and its relationship with occup... more The purpose of this study was to investigate character variations and its relationship with occupational fatigue and involvement (labor participation) among employees in a melting unit at Sarcheshmeh Copper Complex. This crosssectional research was carried out on 145 employees of melting unit at Sarcheshmeh Copper Complex. A simple random sampling was used to collect data based on the three standard Hospital Anxiety and Depression Scale (HADS), Swedish Occupational Fatigue Inventory (SOFI), and Labor Participation (Job Involvement). One-way ANOVA, Pearson correlation coefficient and Spearman's correlation coefficient were used to analyze the data. The average age of the respondents was 38 ± 6.94 years and their average working experience was 10.46 ± 6.73 years. Among the personnel, (76%, n=111) had acute anxiety and (64%, n=93) had mild depression. The mean and standard deviation of job involvement for these subjects was 52.41 ± 7.12 (Desirable situation). There was a significant relationship among all aspects of fatigue including lack of energy, physical effort, lack of motivation, drowsiness (P <0.05) whereas the physical discomfort with job involvement did not show a positive relationship. The results indicated that there was acute anxiety, mild depression and high job involvement among the employees of melting unit.
Archives of Occupational Health, 2022
Background: Pool fire is a phenomenon caused by the leakage of flammable materials on the ground ... more Background: Pool fire is a phenomenon caused by the leakage of flammable materials on the ground leading to serious hazards, irrespective of its consequences. The proximity and high volumes of chemicals in warehouses require that the characteristics of various materials in warehouses be taken into account for calculating the chain effects of the pool fire. Methods: One of the effective parameters in expanding the impact of pool fire chain is heat flux value. There are different models for calculating and predicting it. In this study, two approaches of computational fluid dynamic (CFD), fire-driven fluid flow, fire dynamics simulator (FDS), and solid flame model were used to predict heat flux values. Results: In both models, the calculated heat flux was used to evaluate the effects on humans (first-degree burns, second-degree burns, and deaths) and the materials. The CFD results were compared with the results of the solid flame model, which indicated that there was little error in t...
Background and Objectives: Millions of workers in the production or using of different chemicals ... more Background and Objectives: Millions of workers in the production or using of different chemicals such as melamine formaldehyde resin are exposed by formaldehyde. In spite of Widespread formaldehyde usage, there are too concerns about its toxicity effects. This study aimed to assess the workers occupational exposure to formaldehyde in some melamine production workshops and blood factors change in the exposed workers. Materials and Methods: This cross-sectional study was performed on 66 workers in Tehran. 40 melamine manufactures workers as exposed group and 26 food industry workers as unexposed group was selected. Occupationally exposure to formaldehyde was assessed by NIOSH 3500 method. Hematological parameters including White Blood Cell, Red Blood Cell, Platelet Count, Lymphocytes Percent and Volume of Red Blood Cells was evaluated. Ethical considerations in this study were adhered based on the Helsinki guidelines. Results: occupationally median exposure to formaldehyde in melamine...
Air Pollution and Health, 2018
Introduction : Sleep restores the human’s body. Some factors such as stress, noise and vibration ... more Introduction : Sleep restores the human’s body. Some factors such as stress, noise and vibration can lead to sleep disorder and hormone imbalance. The purpose of this paper is to study the effect of exposure simultaneously to noise and vibration on sleep disorders of workers in Kerman Motor manufacturing industry. Materials and methods : Analytical descriptive research was done on 200 workers by simple random sampling. The control group has been demographically matched up with the sample group. The standards for samples of this research were workers who are nonsmokers; nonusers of caffeine, soporific or tranquilizer; and do not have special diseases. Sampling was done by sound level meter, oscillator, demographical and sleep disorder information questionnaire. Results : The exposure to noise and vibration is more than permitted amount. The control group and sample group, are all healthy people with no records of disease or tranquilizer medicine consumption. Conclusions : The results...
Introduction: Nowdays, mental workload is one of the most important issues in the workplaces.Vari... more Introduction: Nowdays, mental workload is one of the most important issues in the workplaces.Various factors affect the cognitive capacities of individuals which may lead to human errors. Due to the nature of the work and the use of tools and equipment in the tuna fish factory, the risk of accidents increases as a result of human error.The purpose of this study was to investigate the type of accidents and the relationship between the accidents and mental workload in the tuna fish factory. Methods: This cross-sectional and descriptive-analytical study was carried out on all of the 48 employees of the Zagros Parsian Factory. Nasa-Tlx questionnaire was used to collect data. Accident statistics were obtained through self-reported and recorded accident documents. Data were analyzed by SPSS software using t-test, linear regression, one-way ANOVA and Pearson correlation. Results: The results showed a significant relationship between sex and the rate of the accidents (P-Value<0.009). The...
Journal of Occupational Hygiene Engineering, 2015
Background & Objectives: Job burnout can reduce job performance and productivity. It is more comm... more Background & Objectives: Job burnout can reduce job performance and productivity. It is more common in workers who deal directly with people. This study was conducted to investigate the relationships between demographic variables, productivity, and job burnout in the personnel of a hospital. Methods: In this descriptive-analytical study, all 100 employees of a hospital in Ilam (Iran) were evaluated using a demographic questionnaire, the Maslach Burnout Inventory (MBI), and a productivity questionnaire were studied. Data analysis was performed using descriptive and inferential statistical tests. Results: Correlation analysis showed productivity to be significantly correlated with the frequency of emotional exhaustion and professional efficacy (two scales of the MBI). The highest scores in the emotional exhaustion and decreased professional efficacy scales of the MBI were observed in 41-50and 20-30-year-old individuals, respectively. Education level had significant relations with depe...
Mathematical Problems in Engineering, 2021
Establishing an adequate level of reliability in the overhead crane operations is an important an... more Establishing an adequate level of reliability in the overhead crane operations is an important and vital principle to avoid undesirable consequences. To do this, it is appropriate to have a comprehensive approach for risk and reliability assessment of the most probable failure scenarios during overhead crane operations. In this study, fault tree analysis (FTA) in combination with fuzzy set theory, Bayesian network (BN), and Markov chain was used to evaluate the probability of top event and reliability of overhead cranes. A total of 47 basic events were identified for ladle fall in overhead cranes. The results showed that the probability of the ladle fall in the FT approach is equal to 0.0523035 and in the BN approach in the prior event is equal to 0.0273394 which is less than the FT method. Based on the values predicted by Markov chain, the reliability of the system decreases over time by 67.9% after 60 months. This study showed that the plan for ladle fall prevention should conside...
RSC Advances, 2021
This method described herein does not need any sophisticated laboratory devices and deploy local ... more This method described herein does not need any sophisticated laboratory devices and deploy local resource.