Archives of Hygiene Sciences最新文献

{"title":"Knowledge, Attitude, and Intention of Rural Elderly About Influenza Preventive Behaviors, Fasa, Iran, 2019","authors":"Asghar Keshavarz, M. Nazari, Sanaz Dastmanesh","doi":"10.34172/ahs.12.1.1.374","DOIUrl":"https://doi.org/10.34172/ahs.12.1.1.374","url":null,"abstract":"Background & Aims: Influenza is one of the leading causes of death in the world, especially in the elderly. This study examined the knowledge, attitudes, and intention of rural elderly about influenza prevention behaviors. Materials and Methods: In this cross-sectional study was performed on 140 rural older people who were selected by multi-stage random sampling in Fasa, Iran. A questionnaire was developed to inform about individuals’ knowledge, attitude, and practice on influenza prevention measures. Data were analyzed using frequency descriptive statistics and the Chisquare test by SPSS-21. Results: A total of 61 men (mean age of 69.32±6.81) and 71 women (mean age of 69.04±7.52) responded to the questionnaire. The mean score of knowledge in women (6.8±2.1) was significantly higher than in men (5.8±2.7). The mean score of knowledge in illiterate people (6.45±2.43) compared to literate people (6.08±2.58) showed no significant differences. In addition, the differences between the mean score of attitudes in both men (5.67±5.67) and women (6.05±29.59) were not significant. Likewise, there were no significant differences between the mean scores of attitudes in the literate (28.74±5.74) and illiterate (29.87±5.89) elderly. The mean scores of intention in men and women were 6.18±1.76 and 6.13±1.53, respectively, which was not significantly different. Finally, the mean scores of intention in literate (5.85±2.14) and illiterate (6.25±1.42) participants were not significantly different. Conclusion: The knowledge, attitude, and intention of rural elderly about influenza prevention behaviors are not satisfactory, and large-scale educational interventions are required in this regard, especially in rural areas.","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49621230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Human Health Risk of Some Heavy Metals in the Surface Soil of Arak Plain","authors":"F. Saberinasab, S. Mortazavi, A. Riyahi Bakhtiari","doi":"10.34172/ahs.12.1.5.141","DOIUrl":"https://doi.org/10.34172/ahs.12.1.5.141","url":null,"abstract":"Background & Aims: Soil contamination with heavy metals is becoming a major environmental concern today. Therefore, the present study was conducted to evaluate the health risks of heavy metals in the surface soil of Arak plain. Materials and Methods: Soil samples were collected by random sampling from 30 stations with three replications from a depth of 0-20 cm. After acidic digestion of the samples (HNO3: HclO4: HF=3: 2: 1), the concentrations of lead (Pb), zinc (Zn), copper (Cu), nickel (Ni), and cadmium (Cd) were determined by atomic absorption spectrometry. Finally, the carcinogenic and non-carcinogenic hazards of heavy metals in surface soils for human health were assessed through ingestion, inhalation, and dermal absorption using the method recommended by the EPA for children and adults. Results: The results indicated that the average total concentrations of heavy metals of Pb, Zn, Cu, Ni, and Cd in the study area are 10.01, 13.83, 39.82, 43.41, and 11.9 mg/kg, respectively. The highest and lowest average daily dose (ADD) of elements in both age groups were related to Ni metal from the ingestion route and Cd metal from the inhalation tract, respectively. Further, the non-carcinogenic risk hazard quotient (HQ) of heavy metals in all three paths was less than 1. The results of the non-carcinogenic hazard index (HI) risk assessment of all three pathways separately for each metal and for both groups of children and adults showed metal values as Cu>Cd>Zn>Pb>Ni, respectively. In addition, the results of the carcinogenic risk index (RI) in the surface soil of Arak plain revealed that Ni and Pb have the highest and the lowest carcinogenic risk, respectively. Conclusion: Finally, considering the size of the study area and proving the carcinogenic hazards and risks in the area, it is necessary and important to pay attention to health and environmental principles.","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45212600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Safety Risk Assessment in the Tile Industry with a New Approach","authors":"M. Khandan, Mohammad Jafari, A. Koohpaei, Zeinab Hosseinzadeh, Abbas Sadeghi","doi":"10.34172/ahs.12.1.10.36","DOIUrl":"https://doi.org/10.34172/ahs.12.1.10.36","url":null,"abstract":"Background & Aims: Despite the relative comfort and welfare today’s modern technology has brought to humankind, it has also been the basis for the emergence of risks and threats. These risks and risk factors should be assessed and controlled using systematic risk assessment and management methods. Numerous techniques and methods have been developed to analyze risks, each of which has its own strengths and weaknesses. One of the system risk analysis techniques, which is among qualitative techniques and identifies and analyzes system risks inductively, is the functional hazard analysis (FuHA) technique. The present study aims to identify and control risks that occur due to technical defects or system dysfunctions and can lead to an unpleasant event, as occurred in an industrial unit in 2016. Methods: In this cross-sectional analytical study, the functional risks of an industrial unit were analyzed using the FuHA technique. By implementing the FuHA technique in the investigated industrial unit, 17 functional defects were identified. Results: In general, according to the level of severity of different consequences caused by the identified defects, 60 functional risks were identified, of which 7 cases (11.67%) were assessed as unacceptable, 17 cases (28.33%) as unfavorable, and 36 cases (60%) as acceptable but needing revision. Conclusion: The results of this study showed that the FuHA technique had a favorable ability to identify and analyze system and subsystem functional risks, especially software subsystems.","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47468685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mediating Role of Coping Strategies and Defense Mechanisms in Relationship of Mental Health, Resilience, and Perceived Social Support with Posttraumatic Growth in COVID-19 Survivors","authors":"Elnaz Deldadeh Mehraban, A. Farhangi, S. Abolghasemi","doi":"10.34172/ahs.12.1.1.395","DOIUrl":"https://doi.org/10.34172/ahs.12.1.1.395","url":null,"abstract":"Background & Aims: Posttraumatic growth (PTG) refers to positive changes resulting from trauma. As a traumatic stressor, COVID-19 can affect various aspects of one’s life. The present study aimed to investigate the mediating role of coping strategies and defense mechanisms in the relationship of PTG and mental health, resilience, and perceived social support in COVID-19 survivors. Materials and Methods: This study was conducted using a path analysis method from the correlation matrix. The research population included all COVID-19 recovered patients in Golestan province, Iran. Using the convenience sampling method, 300 patients who recovered from COVID-19 were selected. The participants were given questionnaires online. The research instruments included the Posttraumatic Growth Inventory (PTGI), the General Health Questionnaire (GHQ-28), the Multidimensional Scale of Perceived Social Support (MSPSS), Connor-Davidson Resilience Scale (CD-RISC), the Defense Style Questionnaire (DSQ), and the Ways of Coping Questionnaire (WOC). The data were analyzed through structural equation modeling (SEM) using SPSS and AMOS version 25. Results: The findings of SEM revealed that the model fits the data. The relationship between problem-focused coping strategies and PTG, mental health, and perceived social support, the relationship between PTG and perceived social support, resilience, and mental health, and the relationship between mature defense mechanisms and PTG, mental health, resilience, and perceived social support were positive and significant (P<0.01). The relationship between emotion-focused strategies and PTG, resilience, and perceived social support, the relationship between neurotic defense mechanisms and mental health, resilience, PTG, and perceived social support, and the relationship between immature defense mechanisms and mental health, resilience, and PTG were negative and significant (P<0.01). Furthermore, the direct path analysis revealed that the relationships between mental health and emotion-focused strategies and between perceived social support and immature defense mechanisms were not significant. Conclusion: The study results suggested that mental health, resilience, perceived social support, as well as problem-focused coping strategies played a crucial role in increasing PTG in COVID-19 patients. Therefore, they can be utilized to reduce the mental damage caused by the COVID-19 pandemic.","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45425268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fungal Contamination of Wrestling and Bodybuilding Clubs in Hamedan Province, Western Iran","authors":"Z. Sadeghi Dehkordi, Aso Hajihasani, Shahriar Keihani, Bahareh Kordi, A. Sadeghinasab","doi":"10.34172/ahs.11.4.208.2","DOIUrl":"https://doi.org/10.34172/ahs.11.4.208.2","url":null,"abstract":"Background & Aims: This study first evaluated the fungal contamination of tools and surfaces in wrestling and bodybuilding clubs in Hamedan province, western Iran. Materials and Methods: This cross-sectional study was conducted from September 2018 to May 2019 focusing on nine wrestling and bodybuilding clubs in different areas of Hamedan province. The sterile carpet method (10×10) was used for sampling from mats floor and wall, bath and WC, locker room and parquet surfaces, and environmental air. Common mediums and methods in mycology were employed to culture samples and detect grown fungi. Results: The most frequently isolated fungal genera were Rhizopus (24%), Penicillium (24%), Aspergillus flavus (23%), Aspergillus niger (19%), yeast (7%), Scopulariopsis (6%) Mucor, and Ulocladium (1%). Based on the results, no dermatophyte contamination was detected in any of the samples. The most contaminated surfaces (place of sampling) were wrestling mats (95.7%). The highest and lowest prevalence rates of fungal contamination in this study were found in Razan (87.5%) and Malayer (72.7%), respectively. Conclusion: According to our results, the most contaminated surfaces belonged to wrestling mats. Thus, we would suggest that common-sense hygiene measurements should be continued, including showering after every encounter, washing practice clothes daily, and disinfecting mats daily.","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49539753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Efficiency of Polyaluminum Silicate Chloride Coagulants in Nickel Removal from Aqueous Solutions","authors":"M. Mohammadi, A. Takdastan, Mehdi Zhoolanezhad, A. Neisi","doi":"10.34172/ahs.11.4.380.1","DOIUrl":"https://doi.org/10.34172/ahs.11.4.380.1","url":null,"abstract":"Background & Aims: Nickel is one of the toxic heavy metals naturally released into the environment through industrial activities. Coagulation and flocculation are one of the available heavy metal removal methods, but experience has shown that high pH and the addition of coagulant aid are usually required to remove nickel by coagulation and flocculation process. This study aimed to examine the efficiency of polyaluminum silicate chloride (PASiC) coagulant in nickel removal from aqueous solutions. Materials and Methods: This study was conducted experimentally on a laboratory scale using the standard jar testing method. We investigated the effect of pH parameters (4-11), amount of coagulant (7.5-75 mg/L based on aluminum), initial metal concentration (10-400 mg/L), and settling time (15-90 minutes). Nickel concentration was measured by flame atomic absorption spectroscopy. In this study, t test, between-groups ANOVA, and regression were used for analysis. Results: Results showed that the removal efficiency decreased at higher concentrations of nickel metal. Furthermore, increasing the settling time beyond 30 minutes did not significantly change the removal efficiency. PASiC had a removal efficiency of over 99% at an optimum pH of 8, an optimum PASiC concentration of 15 mg/L, an optimum time of 30 minutes, and a nickel concentration of 10-100 mg/L. Conclusion: According to the results, the use of PASiC as a coagulant is a suitable option for removing nickel from polluted wastewater.","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45983682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effects of Collaboration Culture on Knowledge Creation: A Study in Hospitals Affiliated to Qom University of Medical Sciences","authors":"Shahrokh Rahbar, A. Omidi Oskouei, A. Rahbar","doi":"10.34172/ahs.11.4.373.1","DOIUrl":"https://doi.org/10.34172/ahs.11.4.373.1","url":null,"abstract":"Background & Aims: Organizational culture and knowledge management affect all aspects of an organization. Thus, in this study, we aimed to investigate the impact of the components of Collaboration culture on knowledge creation in hospitals affiliated with Qom University of Medical Sciences in 2017. Materials and Methods: This cross-sectional-analytical research was conducted on 570 employees of the hospitals affiliated with Qom University of Medical Sciences. The research tool was a researcher-made questionnaire with a five-point Likert scale. The validity of the questionnaire was confirmed through content validity and convergent validity, and its reliability was assessed by Cronbach’s alpha method and composite reliability. The data were analyzed using SPSS 20 and Lisrel 8.8 software employing exploratory factor analysis, confirmatory factor analysis, and structural equation modeling. Results: The means and standard deviations of Collaboration culture and knowledge creation were 3.071±1.301 and 3.28±1.11, respectively; their Cronbach’s alpha coefficients were 0.972 and 0.944; their composite reliability indices were obtained as 0.782 and 0.847, and the convergent validities of these domains were as 0.810 and 0.852, respectively. Exploratory factor analysis classified the constructs into the two sections of learning culture and knowledge creation, which were confirmed by fit indices. Conclusion: The results showed that the Collaboration culture component has a positive and meaningful relationship with the knowledge creation component. Therefore, hospital managers should notice the benefits of providing the necessary infrastructure for the implementation of knowledge management and holding workshops for employees to educate them on the fundamentals of cooperation culture and knowledge creation.","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48445229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Yoga on Organizational Happiness of Female Employees of Islamic Azad University, Tehran Medical Sciences Branch","authors":"Yalda Amouzadeh, Faride Ashraf Ganjoui, Sarah Haji Anzhaee","doi":"10.34172/ahs.11.4.369.2","DOIUrl":"https://doi.org/10.34172/ahs.11.4.369.2","url":null,"abstract":"Background & Aims: The present study was carried out to assess the effect of yoga on organizational happiness in female employees of the Tehran Islamic Azad University-Tehran Medical Sciences. Materials and Methods: This randomized study was conducted in Tehran on 40 female employees in 2019. The volunteers were randomly assigned to two control and exercise groups. The exercise group (20 people) performed two sessions of yoga exercises every week for 12 weeks. The control group (20 people) only performed daily activities. After 12 weeks of training, the data was collected in both groups using the Hills and Argyle Standard Happiness Questionnaire (2002), which included 25 questions and 5 components. A group of expert faculty members confirmed the face and content validity of the instrument. Also, reliability was reported as 0.73 through Cronbach›s alpha test. Data were analyzed using independent t-tests and paired-sample t tests. Results: Findings demonstrated that yoga had significant effects on the organizational happiness of female employees of the Tehran Azad University of Medical Sciences (P<0.001). Conclusion: Considering the findings, it can be concluded that yoga can promote the physical health and happiness of female personnel.","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47551922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Chemical Composition of Vaccaria oxyodontha Boiss Plant Essential Oils and Antioxidant and Antibacterial Effects on Gram-Negative and Gram-Positive Bacteria","authors":"Rahele Bahrami, M. Soori, H. Abbaspour, H. Hashemi-moghaddam, Taghi Lashkarbolouki, R. Moradi, A. Yari","doi":"10.34172/ahs.11.4.103.9","DOIUrl":"https://doi.org/10.34172/ahs.11.4.103.9","url":null,"abstract":"Background & Aims: Caryophyllaceae is a large family of about 2200 herbaceous or subshrub species. Vaccaria oxyodontha Boiss is of the family Caryophyllaceae. This plant grows as a weed in agricultural land of sugarcane, wheat, barley, forage, and summer crops such as sugar beet, potato, cotton, and onion. All parts of the V. oxyodontha Boiss plant, especially its root, contain a type of saponin, which shows its medicinal value. According to traditional Iranian medicine, this plant is a blood purifier and has anti-infective, utilized for cough, anti-rheumatism, and anti-inflammatory properties. This study first aimed to investigate the chemical composition of V. oxyodontha Boiss essential oil (EO) and the antioxidant and antibacterial properties of the hydroalcoholic extract of this plant on gram-positive and gram-negative bacteria. Materials and Methods: In this study, EOs were extracted from the aerial parts of V. oxyodontha Boiss using the combination of hydrodistillation and microwave-assisted hydrodistillation methods. Then, the antioxidant properties and antibacterial activity of the extract were evaluated, and the chemical compositions of the EOs of V. oxyodontha Boiss were determined using gas chromatography-mass spectroscopy (GC-MS). The extract’s antioxidant activity was studied by the 2,2-diphenyl-1- picrylhydrazyl-hydrate (DPPH) method. In addition, the plant antimicrobial effects were investigated by the agar disk diffusion method, and minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined as well. Finally, the antibacterial activity of the mentioned plant was compared with the antibiotic discs of gentamicin (10 mg) and vancomycin (30 mg). Results: The major compounds in the EOs were 2-Pentadecanone,6,10,14-trimethyl (10.52%) and 1,2-Benzenedicarboxylic acid (19.27%). Half maximal inhibitory concentration (IC50) of V. oxyodontha Boiss was 0.49 µg/mL, which was higher than that of vitamin C (IC50 value of 0.56 µg/mL). Further, MIC and MBC for the V. oxyodontha Boiss extract against Staphylococcus aureus and Escherichia coli were 62.5 and 125 mg/mL, as well as 31.25 and 62.5 mg/mL, respectively. Conclusion: The results of GC-MS demonstrated that the EO of the V. oxyodontha Boiss plant contains antioxidant and antibacterial compounds. Its antioxidant properties are higher than vitamin C. The highest diameter of the inhibition zone caused by the methanol extract of the V. oxyodontha Boiss plant was against S. aureus and E. coli (23.7±0.29 mm and 15.65±0.33 mm, respectively). Compared with the antibiotics vancomycin, the Vaccaria oxyodontha Boiss represented a stronger inhibitory effect in the inhibition of S. aureus (P<0.05).","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47057123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"\u0000 Relationship Between the Concentration of Airborne Benzene Pollutant and the Amount of Urinary Metabolites of Trans, Trans-muconic Acid, and Hippuric Acid in Employees Working in Different Plants of Bou Ali Sina Petrochemical Company","authors":"S. Sabzalipour, Siavash Cheraghi, Elahe Zallaghi, Mohamad Erbian Gharmsir","doi":"10.34172/ahs.11.4.349.1","DOIUrl":"https://doi.org/10.34172/ahs.11.4.349.1","url":null,"abstract":"Background & Aims: The petrochemical industry as a modern industry, despite the positive outcomes it has brought to mankind, is a source of gaseous and aerosol pollution and industrial effluents on a large scale, which can have direct and indirect destructive effects on the environment and human life. This study investigated the relationship between the amount of airborne benzene with the amount of trans,trans-muconic acid (ttMA) and hippuric acid metabolites in the urine of workers working in petrochemical complexes with different exposure times and methods. Materials and Methods: For this purpose, breathing the air of different petrochemical plants of Bou Ali Sina was sampled by the National Institute for Occupational Safety and Health 1501 method, and the urine of workers (n = 24) was also sampled in these units. In addition, the amount of benzene in the air samples and the amount of urinary metabolites of ttMA and hippuric acid were analyzed in urine samples sent to the laboratory using a high-performance gas chromatography-mass spectrometry device and gas-liquid chromatography. Finally, urinary creatinine was measured by an ultraviolet-visible spectrophotometer. Results: The results showed that the concentration of benzene in the aromatic unit had the highest value, which had a higher level of pollution than both standards. The xylene mixing unit with a concentration of 3.6 µg/m3 , the loading unit with a benzene content of 3.4 µg/m3 , and a tank unit with 2.8 µg/m3 had a lower amount of benzene pollution compared to the Occupational Safety and Health Administration permissible exposure limit-short-term exposure limit (OSHA PEL-STEL) standard but had higher pollution levels in comparison to the OSHA PEL-TWA (time-weighted average) standard. In the sampling unit of the laboratory with a benzene amount of 0.94 µg/m3 and in the technician unit of the laboratory, the amount of pollution was lower than both OSHA PEL-TWA and OSHA PEL-STEL standards. The aromatic unit demonstrated the highest amount of benzene, while the lowest amount was related to the laboratory section. Conclusion: The results of the measurement of urinary benzene metabolites revealed that the concentration of urinary phenol and inhaled benzene in evening shift workers was higher than the corresponding amount in the morning shift workers, which may be due to the high level of pollution evenings compared to the morning. On the other hand, the results represented that the average hippuric acid in the exposed people (n=24) was higher than the control (n=20) so that it was 0.35 in the exposed and 0.26 in the control subjects. In addition, the average muconic acid in the exposed and control subjects decreased to 1.57 and 0.89, respectively. The minimum and maximum amounts of muconic and hippuric acids in the exposed subjects were 0.97 and 2.62, as well as 0.14 and 0.83, respectively. The maximum and minimum concentrations of muconic and hippuric acids were 2.62 and 0.97, as well as 0","PeriodicalId":8299,"journal":{"name":"Archives of Hygiene Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48600204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}