scholarly journals Airborne Particulate Matter Density in Traditional Bakeries of Saveh, Central of Iran, in 2020

2020 ◽  
Author(s):  
Edris Hoseinzadeh ◽  
Mehrzad Ghorbani ◽  
Mahdi Safari ◽  
Najmeh Ebrahimi
Keyword(s):  
Particulate Matter ◽  
Particle Concentration ◽  
Gravimetric Method ◽  
Airborne Particulate Matter ◽  
High Concentration ◽  
Cross Sectional ◽  
Flour Dust ◽  
Average Size ◽  
High Level ◽  
Respirable Particulate

Introduction: High concentration of inhalable airborne particles can increase the risk of lung disease in exposed people. This study aimed to determine the respirable particulate matter (PM5) concentration in traditional bakeries of Saveh in 2020. Materials and Methods: This cross-sectional descriptive study was conducted among 25 bakeries where the samples were collected by cyclone and teflon filter equipped by air sampling pump. Later, the respirable particulate matter concentration was measured using gravimetric method. The collected PM5 was scanned using a FTIR (Fourier-transform infrared spectroscopy) with regard to flour dust. In addition, size and shape of the collected PM5 were analyzed using a scanning electron microscope (SEM). Results: Findings showed that the Lavash bakery had the highest PM5 concentration (9.15 mg/m3) in comparison with two other bakeries (Sangak and Barbari). However, an inverse relationship was observed between RH and particle concentration. In addition, the results demonstrated that increasing RH decreased the particle concentration, but the relationship was not significant (P = 0.052, Spearman's rho = -0.393). Furthermore, Lavash bakery had the lowest average size of PM5 (0.63 ± 0.32 μm). However, the FTIR scans confirmed that the flour dust had the predominant amount of PM5. Conclusion: Based on the findings, the density of respirable PM5 has a high level in Saveh bakeries and workers  are exposed to high levels of PM.

scholarly journals Application of X-ray fluorescence method for elemental analysis of PM2.5 fraction

Nukleonika ◽  
2015 ◽  
Vol 60 (3) ◽  
pp. 621-626 ◽  
Author(s):  
Lucyna Samek ◽  
Leszek Furman ◽  
Tomasz Kawik ◽  
Kinga Welnogorska
Keyword(s):  
Air Pollution ◽  
Trace Elements ◽  
Particulate Matter ◽  
Blood Vessel ◽  
Elemental Analysis ◽  
Gravimetric Method ◽  
Fluorescence Method ◽  
Scientific Interest ◽  
High Concentration ◽  
X Ray

Abstract The scientific interest in air pollution comes from its influence on human health, the condition of cultural heritage and climate. The PM2.5 fraction (particles of a diameter of 2.5 mm or below), indirectly, has a significant impact on health which is associated with respiratory tract and blood vessel related diseases. However, not only the size, but also the content of the particles has a significant meaning. To determine the particulate matter contents, elemental analysis can be performed using numerous techniques, the most important of which is X-ray fluorescence. In this study, samples of PM2.5 fraction collected in Krakow, Poland were analyzed. The X-ray fluorescence method was used to perform elemental analysis. The gravimetric method was applied to determine the concentration of the PM2.5 fraction. Low detection limits of individual elements and precision of the X-ray fluorescence method were determined. The concentrations of the following elements: Cl, K, Ca, Cr, Mn, Fe, Cu, Zn, Br, Rb, Sr and Pb in the PM2.5 fraction samples collected in Krakow were evaluated. The homogeneity of the samples was also estimated. The concentrations of PM2.5 fraction collected in the summer of 2013 were in the range of 6-23 ng/m3. The concentrations of PM2.5 fraction collected in the winter of 2013 were in the range of 26-171 ng/m3. The precision of the method was found to be below 1% for elements with high concentration in the sample and 6-8 % for trace elements.

scholarly journals Airborne particulate matter and mitochondrial damage: a cross-sectional study

2010 ◽  
Vol 9 (1) ◽  
Author(s):  
Lifang Hou ◽  
Zhong-Zheng Zhu ◽  
Xiao Zhang ◽  
Francesco Nordio ◽  
Matteo Bonzini ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Airborne Particulate Matter ◽  
Cross Sectional Study ◽  
Mitochondrial Damage ◽  
Sectional Study ◽  
Airborne Particulate ◽  
Cross Sectional

Transcriptional regulation of the HO-1 gene in cultured macrophages exposed to model airborne particulate matter

2003 ◽  
Vol 284 (3) ◽  
pp. L473-L480 ◽  
Author(s):  
Beek Yoke Chin ◽  
Michael A. Trush ◽  
Augustine M. K. Choi ◽  
Terence H. Risby
Keyword(s):  
Gene Expression ◽  
Transcriptional Regulation ◽  
Particulate Matter ◽  
Mutational Analysis ◽  
Regulatory Element ◽  
Airborne Particulate Matter ◽  
Regulatory Elements ◽  
Raw 264.7 Cells ◽  
Dependent Manner ◽  
Respirable Particulate

Respirable particulate matter generated during incomplete combustion of fossil fuels may principally target the cells found in the distal region of the lung. This study characterizes some of the effects that a model particulate matter has on the induction of heme oxygenase (HO)-1 in macrophages. HO-1 is a highly inducible stress response gene that has been demonstrated to modulate chemical, physical, and environmental stimuli. Cultured macrophages (RAW 264.7 cells) exposed continuously to a well-defined model of particulate matter (benzo[ a]pyrene adsorbed onto carbon black) induced HO-1 gene expression in a time-dependent manner. Likewise, the addition of benzo[ a]pyrene-1,6-quinone, a redox cycling metabolite of benzo[ a]pyrene, to RAW cells also induced HO-1. This particle-induced gene expression of HO-1 was found to correlate with a corresponding increase in protein levels. Gene regulation studies were performed to delineate the transcriptional regulation of HO-1 after exposure to model particulate matter. Deletional analysis of the HO-1 gene and mutational analysis of activator protein (AP)-1 regulatory element on both distal enhancers demonstrated the importance of this transcriptional factor in mediating HO-1 gene transcription in response to model particulate matter. These results were supported by gel shift analysis demonstrating increased AP-1 binding activity after exposure to particulate matter. In summary, this study demonstrates that model particulate matter enhanced the expression of HO-1. This inductive process may be mediated by AP-1 activation of the regulatory elements on both the 5′-distal enhancers.

scholarly journals Particle size distribution of airborne particulate matter in Petropavlovsk-Kamchatsky and Yelizovo based on the results of several years of study

2021 ◽  
pp. 66-72
Author(s):  
A. S. Kholodov ◽  
K. Yu. Kirichenko ◽  
K. S. Golokhvast
Keyword(s):  
Particle Size ◽  
Particulate Matter ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Airborne Particulate Matter ◽  
Kamchatka Peninsula ◽  
Airborne Particulate ◽  
High Concentration ◽  
Anthropogenic Aerosols ◽  
Snow Samples

Introduction. Kamchatka Krai is a region with low population density and poorly developed industry. However, in large cities the air quality is degraded due to economic activity. Aim. To study the concentration of airborne particulate matter (in particular, up to 1 µm and up to 10 µm) in Petropavlovsk-Kamchatsky and Yelizovo air and carry out a comparative analysis with the previously obtained results of environmental monitoring of atmospheric suspension.Materials and methods. Airborne particulate matter was studied in snow which was collected during snowfalls to avoid its secondary pollution by anthropogenic aerosols. The melted snow was analyzed on a Fritsch Analysette 22 NanoTech laser particle analyzer (Germany).Results. PM1 particles were found in five snow samples taken in Petropavlovsk-Kamchatsky. The quantity of PM₁₀ is low in all samples, and only in two of six sampled areas it reaches 12%. Compared to the results of previous studies, the concentration of PM1 is at the same level as in previous years, and the content of PM₁₀ has decreased. In samples from Yelizovo, the same trends are observed. Compared to 2018, when a high concentration of PM₁₀ particles was found in almost all samples, reaching 57.2%, there is a trend towards a decrease in the concentration of the potentially hazardous PM fraction.Conclusion. Updated data on the particle size distribution of airborne particulate matter in two cities of the Kamchatka Peninsula were obtained. In the snow samples collected in Petropavlovsk-Kamchatsky and Yelizovo, we found PM₁ and PM₁₀ particles hazardous to human health, although their concentration is generally lower than in previous years of the study. 

scholarly journals On the transport of heavy particles through an upward displacement-ventilated space

2015 ◽  
Vol 772 ◽  
pp. 478-507 ◽  
Author(s):  
Nicola Mingotti ◽  
Andrew W. Woods
Keyword(s):  
Particle Concentration ◽  
Quantitative Model ◽  
Operating Conditions ◽  
Cross Sectional ◽  
Heavy Particles ◽  
Upward Displacement ◽  
Lateral Mixing ◽  
Settling Speed ◽  
High Level ◽  
Ventilation Rates

We explore the transport of heavy particles through an upward displacement-ventilated space. The space incorporates a localised source of buoyancy which generates a turbulent buoyant plume. The plume fluid is contaminated with a small concentration of particles, which are subject to gravitational settling. A constant flow of uncontaminated fluid is supplied at a low level into the space, while an equal amount of fluid is vented from the space at a high level. At steady state, a two-layer density stratification develops associated with the source of buoyancy. New laboratory experiments are conducted to explore how particles are transported by this flow. The experiments identify that the upper layer may either become well-mixed in particles or it may develop a vertical stratification in particle concentration, with the particle concentration decreasing with height. We develop a quantitative model which identifies that such stratification develops for larger particle setting speeds, or smaller ventilation rates. In accord with our experiments, the model predicts that the number of particles extracted from the space through the high-level vent is controlled by the magnitude of the particle stratification in the upper layer, and this in turn depends on the particle settling speed relative to the ventilation speed and also the cross-sectional area and height of the space. We compare the predictions of the model with measurements of the flux of particles vented from the space for a range of operating conditions. We explore the relevance of the model for the removal of airborne contaminants by displacement ventilation in hospital rooms, and we discuss how contamination is propagated in the room as a result of lateral mixing of pathogens in the upper layer.

scholarly journals Personal Exposure of Traffic Policeman to Particulate Matter in Jakarta: Distribution of Size, Chemical Composition, and Work Time

2019 ◽  
Vol 14 (2) ◽  
Author(s):  
Doni Hikmat Ramdhan ◽  
Eka Fitriani Ahmad ◽  
Fitri Kurniasari ◽  
Zuly Prima Rizky ◽  
Hardy Atmajaya ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Black Carbon ◽  
Fine Particles ◽  
Fine Particulate Matter ◽  
Gravimetric Method ◽  
Personal Exposure ◽  
Air Pollutant ◽  
High Concentration ◽  
Traffic Policeman ◽  
Near Highway

Particulate matter (PM) is an air pollutant that has an impact on public health, especially in an urban area. The objective of this study was to analyze the personal concentration of PM2.5 and its composition among police working in the roadside area in Jakarta. PM measurement has done to the policeman that controlled traffic on four near highway locations in Jakarta. Sioutas impactor, Leland Legacy personal pump, and quartz fiber filter were chosen to measure the fine particles. Each PM was measured for 8-hour period. PM concentration was analyzed by the gravimetric method while tracing element and black carbon in PM0.25 by energy dispersive X-ray fluorescence (EDXRF) and EEL Smoke Stain Reflectometer. As a result, near highway PM2.5 concentration in Jakarta during weekdays and weekends measurement are 92.18 ± 10.66 μg/m3, and 78.09 ± 11.61 μg/m3. S, K, Fe, Ca, Zn, and Pb are major elements found in all locations. The black carbon concentration in all location was 17 ± 5.7 μg/m3. A high concentration of fine particles, a traffic-related trace element in PM0.25, and black carbon are showed that traffic-related source is the major contributor to a high level of fine particulate matter at near highway locations in Jakarta. The weekday's concentration of PM2.5 and PM0.25 among Jakarta Policemen was higher than in the weekend concentration. A particle with size of less than 0.25 µm dominated the fine particles concentration. Further researcher is expected to see the difference in the effects of traffic-related particulate matter exposure between traffic policeman and police who work at office.

Hubungan antara Asupan Karbohidrat dan Lemak dengan Kadar Trigliserida pada Pesenam Aerobik Wanita

2017 ◽  
Vol 19 (2) ◽  
pp. 84-89
Author(s):  
Diah Nur Khasanah ◽  
Idi Setiyobroto ◽  
Weni Kurdanti
Keyword(s):  
Coronary Heart Disease ◽  
Triglyceride Level ◽  
Observational Research ◽  
Fat Intake ◽  
Cross Sectional ◽  
Exact Test ◽  
High Carbohydrate ◽  
High Consumption ◽  
High Level ◽  
High Triglyceride

Background: A long-standing association exists between elevated triglyceride levels and coronary heart disease (CHD). High consumption of fat and carbohydrate influences enhancement of triglycerides level. Sport can reduce cholesterol and triglycerides level. Objective: This research aims to analyze relationship between carbohydrates and fat intakes with triglycerides level on female aerobic gymnasts. Method: This is an observational research using cross sectional research design which was held in Miracle Gymnasium on February17- 18th 2017. 30 subjects were selected as subject because fulfill the requirement (older than 20 years and have willingness to be a subjects). Research variable areintakes of carbohydrate, fat, and triglyceride levels. Result: Result shows 53.3% subjects have high level of carbohydrate and fat intakes followed  by 20% subjects with high level       of triglycerides. Subjects with high level of carbohydrate, fat intakes and high triglyceride level are 28%. Subjects withsufficient carbohydrate, fat intakes and high triglyceride level are 12.5%.Fisher’s exact test was done to prove hypothesis with results there is no significant relationship between carbohydrate and fat intake with triglyceride level. Conclusions: Subjects with high carbohydrate and fat intake is 53.3% and 20% subjects have high triglyceride level. Relationship between carbohydrate and fat intake with triglyceride level on female aerobic gymnasts is not significant (p>0.05).   Keywords: Intake, Carbohydrate, Fat, Aerobic Gymnasts, Triglyceride

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