The Effect of Occupational Noise Exposure on Blood and Biochemical Parameters: A Case Study of an Insulator Manufacturer in Iran

Mohammadi, Hamzeh; Alimohammadi, Iraj; S, Roshani; Pakzad, Reza; Abdollahi, M; Dehghan, Somayeh Farhang

doi:10.19082/1740

Cited by 19 publications

(19 citation statements)

References 20 publications

(22 reference statements)

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“…The authors noted that in the Czech Republic, 75% of workers exposed to noise in textile production are observed to be female, followed by 5% in food production. Mohammadi et al [7] observed a significant effect of occupational noise on the blood biochemical parameters of workers in an Iranian insulator manufacturing plant. A relationship between exposure to noise and significantly increased systolic blood pressure of 62 male workers in a sack manufacturing company was found in Nigeria [8].…”

Section: Introductionmentioning

confidence: 99%

Office Distractions and the Productivity of Building Users: The Effect of Workgroup Sizes and Demographic Characteristics

2021

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Knowledge workers are experiencing ever-increasing distractions or unwanted interruptions at workplaces. We explored the effect of unwanted interruptions on an individual’s perceived productivity in various building types, user groups and workgroups. A case study of 68 buildings and their 5149 occupants using the Building Use Studies methodology was employed in this study. The database contains information on the occupants’ perceptions of physical and environmental parameters, including unmined data on the frequency of unwanted interruptions. Pearson’s correlation was used to test the correlation between the variables. In order to determine whether there are any statistically significant differences between the means of two or more independent (unrelated) groups, one-way ANOVA was employed to examine the significance of differences in mean scores between various user groups and workgroups. The evidence of clear correlations between the frequency of unwanted interruptions and perceived productivity is detailed in various user groups and in multiple building types. The Pearson correlation coefficients were −0.361 and −0.348 for sustainable and conventional buildings, respectively, demonstrating a lower sensitivity to unwanted interruptions in sustainable buildings. Females and older participants were more sensitive to unwanted interruptions and their productivity levels were reduced much more by unwanted interruptions. Comparing different sized workgroups, the highest sensitivity to unwanted interruptions for occupants in offices shared with more than 8 people was found. The findings of this study contribute to the understanding of different user needs and preferences in the design of workplaces.

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Section: Introductionmentioning

confidence: 99%

Office Distractions and the Productivity of Building Users: The Effect of Workgroup Sizes and Demographic Characteristics

2021

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“…There are a lot of job environments that are highly exposed to silica, for instance, ironworking, mining and painting, pottery and ceramics factories, foundries, and insulator manufacturers (Greenberg et al, 2007; Mohammadi et al, 2017b; Steenland and Ward, 2014). Isolator is a device with a very high electrical resistance that is used as an electrical insulation between two conductors with different voltages and between a conductor and earth (Mohammadi et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of potential biomarkers of exposure to crystalline silica: A case study in an insulator manufacturer

et al. 2018

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The purpose of this study was to examine the potential determinants of serum neopterin, malondialdehyde (MDA), and erythrocyte glutathione (GSH) as potential markers of oxidative stress, resulting in cellular immune response to inhaled silica particles. This descriptive analytical study was conducted on two groups of exposed workers ( n = 55) and unexposed office workers ( n = 38) of an insulator manufacturing plant. The sampling of airborne silica in the breathing zone of participants was done on the basis of the National Institute for Occupational Safety and Health Method 7601. The blood samples were analyzed by high performance liquid chromatography to determine the level of serum neopterin. A ZellBio GmbH assay kit was used for the quantitative assays of GSH and MDA on the basis of the colorimetric assay. The results of this study show that the measurements of serum neopterin, MDA, and GSH can be considered as potential biological markers of silica exposure for undertaking further comprehensive studies in this area.

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“…The concentration exposure of silica is a determinative factor in the development of silicosis. [ 5 ] The diagnosis of silicosis is possible when it has progressed and person has been involved. Therefore, it is important to propose appropriate biomarkers to identify the high-risk exposures.…”

Section: Discussionmentioning

confidence: 99%

“…During most of its manufacturing processes such as milling, mixing, pressing, assembling, cutting, grinding, and extruding equipment, there is the possibility of emitting silica particles. [ 5 ]…”

Section: Introductionmentioning

confidence: 99%

Evaluation of serum and urinary neopterin levels as a biomarker for occupational exposure to crystalline silica

Mohammadi

Golbabaei

et al. 2016

Ann Med Health Sci Res

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Background:Crystalline silica is a commonly used mineral in various industries and construction activities, and it is so important introducing potential biomarkers to identify early indicators of biological effects in its high-risk occupational exposures.Aim:The present study was aimed to assess the blood and urinary neopterin as an early biomarker of exposure in the workers of an insulator manufacturing plant who are exposed to crystalline silica.Subjects and Methods:This analytical descriptive study was done among two groups of exposed workers (n = 55) and unexposed office workers (n = 38) of an insulator manufacturing plant. Statistical software R was used to determine sample size and select the participants by random sampling among nonsmoker workers. Sampling of airborne silica in breathing zone of participants was done based on the National Institute for Occupational Safety and Health method 7601. The urinary and blood samples were collected and prepared for analysis by high-performance liquid chromatography to determine the level of urinary and serum neopterin. All of the statistical analyses were carried out using SPSS 22.Results:The airborne silica concentration was significantly different between two exposed and unexposed groups (P < 0.001, 0.27 [0.11] vs. 0.0028 [0.0006] mg/m3, respectively). The urinary neopterin in exposed group is significantly higher than the unexposed one (P < 0.001, 97.67 [30.24] vs. 55.52 [2.18] μmol/mol creatinine, respectively). Neopterin level of serum in exposed group is higher than the unexposed group, and there is a significant difference between them (P < 0.001, 6.90 [2.70] vs. 2.20 [1.20] nmol/l, respectively). The positive significant correlations were found between silica exposure concentration with urinary and serum neopterin (P < 0.001, r = 0.36 and 0.59, respectively).Conclusions:Considering the sensitively and easily measurement of neopterin in biological fluid and also the statistically significant positive relationships which were found between the airborne silica concentration and neopterin levels in the present study, the serum and urinary neopterin levels can be considered the potential biomarkers of silica exposure for doing further comprehensive studies in this area.

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The Effect of Occupational Noise Exposure on Blood and Biochemical Parameters: A Case Study of an Insulator Manufacturer in Iran

Cited by 19 publications

References 20 publications

Office Distractions and the Productivity of Building Users: The Effect of Workgroup Sizes and Demographic Characteristics

Office Distractions and the Productivity of Building Users: The Effect of Workgroup Sizes and Demographic Characteristics

Evaluation of potential biomarkers of exposure to crystalline silica: A case study in an insulator manufacturer

Evaluation of serum and urinary neopterin levels as a biomarker for occupational exposure to crystalline silica

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