Particulate Matter (PM2.5, PM10-2.5, and PM10) and Children’s Hospital Admissions for Asthma and Respiratory Diseases: A Bidirectional Case-Crossover Study

Epidemiological studies reported adverse effects of air pollution on the prevalence of respiratory diseases in children. The purpose of this study was to examine the association between air pollution and admissions for asthma and other respiratory diseases among children who were younger than 15 yr of age. The study used data on respiratory hospital admissions and air pollutant concentrations, including thoracic particulate matter (PM10), fine (PM2.5), and coarse (PM10-2.5) particulate matter in Zonguldak, Turkey. A bidirectional case-crossover design was used to calculate odds ratios for the admissions adjusted for daily meteorological parameters. Significant increases were observed for hospital admissions in children for asthma, allergic rhinitis (AR), and upper (UPRD) and lower (LWRD) respiratory diseases. All fraction of PM in children showed significant positive associations with asthma admissions. The …

Alıntılanma sayısı: 315
balikesir.edu.tr alanından [PDF] https://dspace.balikesir.edu.tr/xmlui/bitstream/handle/20.500.12462/8271/lokman-hakan-tecer1.pdf?sequence=1

Yayın tarihi 2008/3/12

Dergi: Journal of Toxicology and Environmental Health, Part A

Effect of meteorological parameters on fine and coarse particulate matter mass concentration in a coal-mining area in Zonguldak, Turkey

Yazarlar: Lokman Hakan Tecer, Pinar Süren, Omar Alagha, Ferhat Karaca, Gürdal Tuncel

Yayın tarihi / 2008/4/1

In this work, the effect of meteorological parameters and local topography on mass concentrations of fine (PM2.5) and coarse (PM2.5–10) particles and their seasonal behavior was investigated. A total of 236 pairs of samplers were collected using an Anderson Dichotomous sampler between December 2004 and October 2005. The average mass concentrations of PM2.5, PM2.5–10, and particulate matter less than 10 μm in aerodynamic diameter (PM10) were found to be 29.38, 23.85, and 53.23 μ/m3, respectively. The concentrations of PM2.5 and PM10 were found to be higher in heating seasons (December to May) than in summer The increase of relative humidity, cloudiness, and lower temperature was found to be highly related to the increase of particulate matter (PM) episodic events. During non-rainy days, the episodic events for PM2.5 and PM10 were increased by 30 and 10.7%, respectively. This is a …

tandfonline.com alanından [PDF]

Alıntılanma sayısı: 163

https://scholar.google.com/citations?view_op=view_citation&hl=tr&user=GE3dzjIAAAAJ&citation_for_view=GE3dzjIAAAAJ:L8Ckcad2t8MC

Prediction of SO2 and PM concentrations in a coastal mining area (Zonguldak, Turkey) using an artificial neural network

In this study, artificial neural networks are proposed to predict the concentrations of SO, and PM at two different stations in Zonguldak city, a major coastal mining area in Turkey. The established artificial neural network models involve meteorological parameters and historical data on observed SO2, PM as input variables. The models are based on a three-layer neural network trained by a back-propagation algorithm. The models accurately measure the trend of SO2, and PM concentrations. The results obtained through the proposed models show that artificial neural networks can efficiently be used in the analysis and prediction of air quality.

Alıntılanma sayısı: 37

Impact of urbanization on local air quality: differences in urban and rural areas of Balikesir, Turkey

Ozone (O3) is a secondary pollutant which is produced photo‐chemically by reactions involving NOx and benzene, toluene, ethylbenzene, and m‐, p‐xylenes (BTEX) in the presence of sunlight. The present study determined outdoor air quality in both the urban area of Balikesir City and rural area (around Ikizcetepeler Dam) in the same region in the western part of Turkey. The main objectives of this study were to analyze the temporal evolution and qualify the spatial distribution by using geostatistical techniques; to determine the spatial variability of air pollutants using the spatial auto‐correlation statistic; and to identify the local spatial patterns of the pollutants in order to highlight the areas of potential risk of O3, NO2, and BTEX pollution and its possible causes. For this purpose firstly, the data were compiled by using passive sampling in winter and in summer. Concentrations of O3 ranged from 14.03 to 42.43 μ g …

Alıntılanma sayısı: 24

https://scholar.google.com/citations?view_op=view_citation&hl=tr&user=GE3dzjIAAAAJ&citation_for_view=GE3dzjIAAAAJ:YsMSGLbcyi4C

A factor analysis study: Air pollution, meteorology, and hospital admissions for respiratory diseases

It is well known that air pollution exerts adverse effects on health and environment. Balıkesir located in the Marmara region (Turkey) has serious air pollution problems produced by heating in the months of winter. In this study, the effect of exposure to air pollution on hospital admission for respiratory illnesses among children and adults was examined. Epidemiological data from records of hospitals, air pollutants and meteorological data were used. During July 2005–July 2007 period, there was a total of 280,426 hospital admissions for respiratory diseases. In a population-based analysis, 9 children were admitted for asthma, 17 children for acute bronchitis, and 20 children for lower respiratory diseases out of 100 children. There was a significant increase in the hospital admissions for respiratory diseases and air pollutants from October to March. It was concluded that children living in the city suffer from respiratory …

Alıntılanma sayısı: 22

https://scholar.google.com/citations?view_op=view_citation&hl=tr&user=GE3dzjIAAAAJ&citation_for_view=GE3dzjIAAAAJ:W7OEmFMy1HYC

Fine and coarse particulate matter, trace element content, and associated health risks considering respiratory deposition for Ergene Basin, Thrace

Ergene Basin is located in Thrace, Turkey, where industries are densely populated. This study aimed to determine exposure of people living in Ergene Basin (Çorlu and Çerkezköy) to fine and coarse PM, and its potentially toxic element (PTE) content by considering variation in respiratory airway deposition rates with daily activities and PM particle size by employing deposition models of International Commission on Radiological Protection and Multiple Path Particle Dosimetry. Fine and coarse PM samples were collected daily for a year at points in Çorlu and Çerkezköy representing urban and industrial settings, respectively. A questionnaire survey was conducted in the study area to obtain time-activity budgets, and associated variation was included in the health risk assessment by considering time-activity-dependent inhalation rates. The studied PTEs were Al, As, Ba, Cd, Cr, Co, Mn, Ni, Pb, and Se. The mean fine …

Alıntılanma sayısı: 20

https://scholar.google.com/citations?view_op=view_citation&hl=tr&user=GE3dzjIAAAAJ&citation_for_view=GE3dzjIAAAAJ:u-x6o8ySG0sC

The evaluation of the effect of air pollution on the health status of children in Zonguldak City, Turkey

Air pollution affects human health, particularly sensitive groups such as children, pregnant women, elderly people and patients with chronic respiratory diseases in many ways, including reduced lung function, increased morbidity and infant mortality. Many epidemiological studies have shown positive association between respiratory health and ambient air pollution. This study tries to assess the associations between Occurrence of Respiratory Symptoms and Diseases (ORSD) and those parameters: Particulate Matter (PM), sulphur dioxide (SO2), pollen and meteorological variables in the mining city of Zonguldak, Turkey. The finding of the study shows significant association between ORSD, and ambient level of PM, SO2 and pollen.

Alıntılanma sayısı: 16

https://scholar.google.com/citations?view_op=view_citation&hl=tr&user=GE3dzjIAAAAJ&citation_for_view=GE3dzjIAAAAJ:IjCSPb-OGe4C

The effects of air pollution and local meteorology on children’s respiratory health: a case-crossover study in Balikesir

In this study, It is estimated the effect of short-term exposure to air pollution on hospital admission for respiratory illnesses among young children. The study used existing data from records of three hospitals. Air quality and meteorological data were used to estimate daily exposure for children. The impact of air pollution on the respiratory health of children is assessed using case-crossover methodology. During study period (June 2007-May 2008), the average particulate matter (PMlO) concentration is 93.77 µg/m^ sup 3^ with 78.93 µg/m^ sup 3^ standard deviation. A significant associations have been found between PMlO level and hospital admissions for all respiratory diseases in all age groups of children. The different odds ratios up to 5% for exposure to PMlO with an increment of 10 µg/m^ sup 3^ were found for respiratory diseases including asthma, pneumonia, acute bronchite.

Alıntılanma sayısı: 1

FİZİKA 2005 CİLD XI № 1-2

The internal friction and the shear modulus have been investigated in PbTe crystals, undopped and dopped by chromium till the temperature 650 C. It has been established at the first time, that the shear modulus increases at the room temperature in the dopped PbTe almost in 2, 5 times, and the elastic limit increases in 5-6 times.

The lead telluride, belonging to the narrow-band semiconductor materials, is widely used in the modern semiconductor technique for the production of lasers and photodetectors in the infrared-ray spectrum region, and also for the production of the high-effective thermoelectric transducers. The investigation of the types of the structural defects and their thermal stability, their influence on the structural-sensitive mechanical properties will cause the expansion of the possibilities of their use in many respects. Such kind of the investigation can be carried out successfully with the use of the acoustic spectroscopy methods, allowing us to define the absolute values of elastic constants, to estimate activation parameters of the different defects and their contribution in the formation of the mechanical properties. physics.gov.az alanından [PDF]

Development of a regression model to forecast ozone concentration in Istanbul City, Turkey

In this study, an air quality model including pollutants (NOx, non methane hydrocyarbons (NMHC)) and meteorological parameters (wind speed, solar radiation, rain, relative humidity and temperature) has been developed for the formation of ozone in Istanbul City. This model has been used to predict the daily ozone concentrations at different time periods and to examine various control strategies.

The ozone prediction model sufficiently explained the change of diurnal and seasonal ozone formation. The diurnal pattern of ozone increases from 12 at noon to 4 am Moreover, the seasonal change of ozone has increased from April to July and reached its maximum level in August. In July and August, the mean ozone concentrations were 11.4 and 10.3 ppb, respectively. In the period of the study, the measurement of the ozone showed that the exposition level to photochemical smog was relatively lower than in other Metropolitan Areas of the world.

Alıntılanma sayısı: 18

https://scholar.google.com/citations?view_op=view_citation&hl=tr&user=GE3dzjIAAAAJ&citation_for_view=GE3dzjIAAAAJ:5nxA0vEk-isC