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Ambient air pollution

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https://www.readbyqxmd.com/read/29783199/inhalational-exposure-to-particulate-matter-air-pollution-alters-the-composition-of-the-gut-microbiome
#1
Ece A Mutlu, Işın Y Comba, Takugo Cho, Phillip A Engen, Cemal Yazıcı, Saul Soberanes, Robert B Hamanaka, Recep Niğdelioğlu, Angelo Y Meliton, Andrew J Ghio, G R Scott Budinger, Gökhan M Mutlu
Recent studies suggest an association between particulate matter (PM) air pollution and gastrointestinal (GI) disease. In addition to direct deposition, PM can be indirectly deposited in oropharynx via mucociliary clearance and upon swallowing of saliva and mucus. Within the GI tract, PM may alter the GI epithelium and gut microbiome. Our goal was to determine the effect of PM on gut microbiota in a murine model of PM exposure via inhalation. C57BL/6 mice were exposed via inhalation to either concentrated ambient particles or filtered air for 8-h per day, 5-days a week, for a total of 3-weeks...
May 18, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29780271/development-and-evaluation-of-the-r-line-model-algorithms-to-account-for-chemical-transformation-in-the-near-road-environment
#2
Alejandro Valencia, Akula Venkatram, David Heist, David Carruthers, Saravanan Arunachalam
With increased urbanization, there is increased mobility leading to higher amount of traffic-related activity on a global scale. Most NOx from combustion sources (about 90-95%) are emitted as NO, which is then readily converted to NO2 in the ambient air, while the remainder is emitted largely as NO2 . Thus, the bulk of ambient NO2 is formed due to secondary production in the atmosphere, and which R-LINE cannot predict given that it can only model the dispersion of primary air pollutants. NO2 concentrations near major roads are appreciably higher than those measured at monitors in existing networks in urban areas, motivating a need to incorporate a mechanism in R-LINE to account for NO2 formation...
2018: Transportation Research. Part D, Transport and Environment
https://www.readbyqxmd.com/read/29780034/improving-predictive-asthma-algorithms-with-modelled-environment-data-for-scotland-an-observational-cohort-study-protocol
#3
Ireneous N Soyiri, Aziz Sheikh, Stefan Reis, Kimberly Kavanagh, Massimo Vieno, Tom Clemens, Edward J Carnell, Jiafeng Pan, Abby King, Rachel C Beck, Hester J T Ward, Chris Dibben, Chris Robertson, Colin R Simpson
INTRODUCTION: Asthma has a considerable, but potentially, avoidable burden on many populations globally. Scotland has some of the poorest health outcomes from asthma. Although ambient pollution, weather changes and sociodemographic factors have been associated with asthma attacks, it remains unclear whether modelled environment data and geospatial information can improve population-based asthma predictive algorithms. We aim to create the afferent loop of a national learning health system for asthma in Scotland...
May 20, 2018: BMJ Open
https://www.readbyqxmd.com/read/29778967/association-between-long-term-exposure-to-ambient-air-pollution-and-diabetes-mortality-in-the-us
#4
Chris C Lim, Richard B Hayes, Jiyoung Ahn, Yongzhao Shao, Debra T Silverman, Rena R Jones, Cynthia Garcia, George D Thurston
OBJECTIVE: Recent mechanistic and epidemiological evidence implicates air pollution as a potential risk factor for diabetes; however, mortality risks have not been evaluated in a large US cohort assessing exposures to multiple pollutants with detailed consideration of personal risk factors for diabetes. RESEARCH DESIGN AND METHODS: We assessed the effects of long-term ambient air pollution exposures on diabetes mortality in the NIH-AARP Diet and Health Study, a cohort of approximately a half million subjects across the contiguous U...
May 17, 2018: Environmental Research
https://www.readbyqxmd.com/read/29778811/associations-between-daily-outpatient-visits-for-respiratory-diseases-and-ambient-fine-particulate-matter-and-ozone-levels-in-shanghai-china
#5
Yiyi Wang, Yaqun Zu, Lin Huang, Hongliang Zhang, Changhui Wang, Jianlin Hu
Air pollution in China has been very serious during the recent decades. However, few studies have investigated the effects of short-term exposure to PM2.5 and O3 on daily outpatient visits for respiratory diseases. We examined the effects of PM2.5 and O3 on the daily outpatient visits for respiratory diseases, explored the sensitivities of different population subgroups and analyzed the relative risk (RR) of PM2.5 and O3 in different seasons in Shanghai during 2013-2016. The generalized linear model (GLM) was applied to analyze the exposure-response relationship between air pollutants (daily average PM2...
May 17, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29775300/secondary-organic-aerosol-formation-from-ambient-air-at-an-urban-site-in-beijing-effects-of-oh-exposure-and-precursor-concentrations
#6
Jun Liu, Biwu Chu, Tianzeng Chen, Changgeng Liu, Ling Wang, Xiaolei Bao, Hong He
Secondary organic aerosol (SOA) is an important component of atmospheric fine particles (PM2.5 ), while the key factors controlling SOA formation in ambient air remain poorly understood. In this work, the SOA formation in Beijing urban ambient air was investigated using an oxidation flow reactor (OFR) with high concentrations of OH radicals. The SOA formation potential increased significantly with the increase of ambient PM2.5 concentration during the observation. The optimum ambient exposure time, which is the aging time equivalent to atmospheric oxidation (with similar OH exposure) associated with the peak SOA formation, varied between 2 to 4 days in this study...
May 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29775285/reduced-ultrafine-particle-concentration-in-urban-air-changes-in-nucleation-and-anthropogenic-emissions
#7
Provat K Saha, Ellis S Robinson, Rishabh Urvesh Shah, Naomi Zimmerman, Joshua Schulz Apte, Allen L Robinson, Albert A Presto
Nucleation is an important source of ambient ultrafine particles (UFP). We present observational evidence of the changes in the frequency and intensity of nucleation events in urban air by analyzing long-term particle size distribution measurements at an urban background site in Pittsburgh, Pennsylvania during 2001-02 and 2016-17. We find that both frequency and intensity of nucleation events have been reduced by 40-50 % over the past 15 years, resulting in a 70% reduction in UFP concentrations from nucleation...
May 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29767793/inhalation-of-house-dust-and-ozone-alters-systemic-levels-of-endothelial-progenitor-cells-oxidative-stress-and-inflammation-in-elderly-subjects
#8
Kim Jantzen, Annie Jensen, Ali Kermanizadeh, Grethe Elholm, Torben Sigsgaard, Peter Møller, Martin Roursgaard, Steffen Loft
Ambient air pollution including ozone and especially particulate matter represents important causes of cardiovascular disease. However, there is limited knowledge on indoor air dust with respect to this risk and the potential interactions between dust and ozone. Here, we exposed 23 healthy elderly subjects for 5.5 h, to either clean air, house dust at 275 µg/m3 (diameter < 2.5 µm), ozone at 100 ppb or combined house dust and ozone in a double-blinded randomized cross-over study. The combined house dust and ozone exposure was associated with a 48% (95% CI 24%-65%) decrease as compared with the clean air exposure, in CD34+KDR+ late endothelial progenitor cells (EPCs) per leukocyte in the blood shortly after exposure, whereas none of the single exposures resulted in a significant effect...
May 14, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29762532/pregnancy-trimester-specific-exposure-to-ambient-air-pollution-and-child-respiratory-health-outcomes-in-the-first-2-years-of-life-effect-modification-by-maternal-pre-pregnancy-bmi
#9
Shu-E Soh, Anne Goh, Oon Hoe Teoh, Keith M Godfrey, Peter D Gluckman, Lynette Pei-Chi Shek, Yap-Seng Chong
Prenatal exposure to air pollution is associated with childhood respiratory health; however, no previous studies have examined maternal pre-pregnancy body mass index (BMI) as a potential effect modifier. We investigated whether maternal pre-pregnancy BMI modified the association of trimester-specific air pollution divided into quartiles of exposure (Q1⁻4) on respiratory health in the Growing Up in Singapore towards healthy Outcomes (GUSTO) study ( n = 953) in 2-year-old children. For episodes of wheezing, children of overweight/obese mothers and who were exposed to particulate matter less than 2...
May 15, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29761364/-low-emission-zones-in-germany-a-reliable-measure-for-keeping-current-air-quality-standards
#10
REVIEW
Josef Cyrys, H-Erich Wichmann, Regina Rückerl, Annette Peters
Low Emission Zones (LEZs) were implemented as a measure for improving the quality of ambient air. As of February 2018, 58 LEZs were in operation in Germany; however they differ significantly, especially regarding their size.The effectiveness of LEZs has been investigated by dispersion modelling as well as by analysis of PM10 (particles which pass through a size-selective inlet with a 50 % efficiency cut-off at 10 μm aerodynamic diameter) and nitrogen dioxide (NO2 ) measurement values. Recent studies show a clear trend...
May 14, 2018: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/29760154/maternal-exposure-to-ambient-particulate-matter-%C3%A2-2-5-%C3%A2%C2%B5m-during-pregnancy-and-the-risk-for-high-blood-pressure-in-childhood
#11
Mingyu Zhang, Noel T Mueller, Hongjian Wang, Xiumei Hong, Lawrence J Appel, Xiaobin Wang
Exposure to ambient air pollution has been associated with greater risk of elevated blood pressure (BP) in adults and children. Recent evidence suggests that air pollution exposure in pregnancy may also portend increased risk for the next generation; however, few studies have examined this relationship. We conducted a prospective study of 1293 mothers in the Boston Birth Cohort (enrolled 1998-2012) and their children who had follow-up visits between 3 and 9 years of age and complete exposure and outcome data...
May 14, 2018: Hypertension
https://www.readbyqxmd.com/read/29754083/genotoxic-and-cytotoxic-properties-of-pm2-5-collected-over-the-year-in-wroc%C3%A5-aw-poland
#12
M K Bełcik, A Trusz-Zdybek, E Zaczyńska, A Czarny, K Piekarska
In the ambient is >2000 chemical substances, some of them are absorbed on the surface of the particulate matter and may causes many health problems. Air pollution is responsible for >3.2 million premature deaths which classifies it as a second place environmental risk factor. Especially dangerous for health are polycyclic aromatic hydrocarbons and their derivatives which shows mutagenic and carcinogenic properties. Air pollutions were also classified by International Agency for Research on Cancer to group which carcinogenic properties on human were proved by available knowledge...
May 10, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29753251/long-term-exposure-to-ambient-particulate-matter-pm-2-5-is-associated-with-platelet-counts-in-adults
#13
Zilong Zhang, Ta-Chien Chan, Cui Guo, Ly-Yun Chang, Changqing Lin, Yuan Chieh Chuang, Wun Kai Jiang, Kin Fai Ho, Tony Tam, Kam S Woo, Alexis K H Lau, Xiang Qian Lao
BACKGROUND: The prothrombotic effects of particulate matter (PM) may underlie the association of air pollution with increased risks of cardiovascular disease. This study aimed to investigate the association between long-term exposure to PM with an aerodynamic diameter ≤2.5 μm (PM2.5 ) and platelet counts, a marker of coagulation profiles. METHODS: The study participants were from a cohort consisting of 362,396 Taiwanese adults who participated in a standard medical examination program between 2001 and 2014...
May 9, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29751446/use-of-multiple-tools-including-lead-isotopes-to-decipher-sources-of-ozone-and-reactive-mercury-to-urban-and-rural-locations-in-nevada-usa
#14
Ashley M Pierce, Mae Sexauer Gustin, John N Christensen, S Marcela Loría-Salazar
Ambient air particulate matter (<2.5μm in diameter) samples were collected on two different filter types in 2014 and 2015 over 24h periods and analyzed for reactive mercury (gaseous oxidized mercury+particulate bound mercury) concentrations and lead isotopes to determine sources of pollution to three sites in Nevada, USA. Two sites were located on the western edge of Nevada (Reno, urban, 1370m and Peavine Peak, rural, high elevation, 2515m); the third location was ~485km east in rural Great Basin National Park, NV (2061m)...
February 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29751338/use-of-spatiotemporal-characteristics-of-ambient-pm-2-5-in-rural-south-india-to-infer-local-versus-regional-contributions
#15
M Kishore Kumar, V Sreekanth, Maëlle Salmon, Cathryn Tonne, Julian D Marshall
This study uses spatiotemporal patterns in ambient concentrations to infer the contribution of regional versus local sources. We collected 12 months of monitoring data for outdoor fine particulate matter (PM2.5 ) in rural southern India. Rural India includes more than one-tenth of the global population and annually accounts for around half a million air pollution deaths, yet little is known about the relative contribution of local sources to outdoor air pollution. We measured 1-min averaged outdoor PM2.5 concentrations during June 2015-May 2016 in three villages, which varied in population size, socioeconomic status, and type and usage of domestic fuel...
May 8, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29748348/association-of-ambient-particulate-matter-with-heart-failure-incidence-and-all-cause-readmissions-in-tasmania-an-observational-study
#16
Quan L Huynh, Christopher Leigh Blizzard, Thomas H Marwick, Kazuaki Negishi
OBJECTIVES: We sought to investigate the relationship between air quality and heart failure (HF) incidence and rehospitalisation to elucidate whether there is a threshold in this relationship and whether this relationship differs for HF incidence and rehospitalisation. METHODS: This retrospective observational study was performed in an Australian state-wide setting, where air pollution is mainly associated with wood-burning for winter heating. Data included all 1246 patients with a first-ever HF hospitalisation and their 3011 subsequent all-cause readmissions during 2009-2012...
May 10, 2018: BMJ Open
https://www.readbyqxmd.com/read/29737586/ambient-air-pollution-and-human-performance-contemporaneous-and-acclimatization-effects-of-ozone-exposure-on-athletic-performance
#17
Jamie T Mullins
This paper utilizes a unique dataset of competitive outcomes from intercollegiate track and field competition to identify the relationship between recent ambient pollution exposure histories and human performance among a young and fit population in a diverse range of physically demanding "tasks". I find that higher contemporaneous ozone levels are associated with poorer performances in events that heavily tax the respiratory system. This is the case despite the low exposure levels observed in the studied sample, which are similar to those regularly experienced across the developed world...
May 8, 2018: Health Economics
https://www.readbyqxmd.com/read/29734629/air-pollution-exposure-during-pregnancy-and-ultrasound-and-birth-measures-of-fetal-growth-a-prospective-cohort-study-in-korea
#18
Dirga Kumar Lamichhane, Jia Ryu, Jong-Han Leem, Mina Ha, Yun-Chul Hong, Hyesook Park, Yangho Kim, Dal-Young Jung, Ji-Young Lee, Hwan-Cheol Kim, Eun-Hee Ha
Few studies have examined the effects of air pollution on fetal growth based on ultrasound measures during pregnancy. More data is needed to evaluate the windows of special vulnerability. Our aim was to investigate the association of ambient air pollution during pregnancy with fetal and neonatal characteristics in a cohort of Korean women. Maternal exposure to particulate matter with an aerodynamic diameter<10μm (PM10 ) and nitrogen dioxide (NO2 ) was estimated using land-use regression models based on residential address...
April 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29734608/urban-local-air-quality-management-framework-for-non-attainment-areas-in-indian-cities
#19
Sunil Gulia, S M Shiva Nagendra, Jo Barnes, Mukesh Khare
Increasing urban air pollution level in Indian cities is one of the major concerns for policy makers due to its impact on public health. The growth in population and increase in associated motorised road transport demand is one of the major causes of increasing air pollution in most urban areas along with other sources e.g., road dust, construction dust, biomass burning etc. The present study documents the development of an urban local air quality management (ULAQM) framework at urban hotspots (non-attainment area) and a pathway for the flow of information from goal setting to policy making...
April 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29730800/ambient-air-emissions-of-polycyclic-aromatic-hydrocarbons-and-female-breast-cancer-incidence-in-us
#20
William Parker Stults, Yudan Wei
To examine ambient air pollutants, specifically polycyclic aromatic hydrocarbons (PAHs), as a factor in the geographic variation of breast cancer incidence seen in the US, we conducted an ecological study involving counties throughout the US to examine breast cancer incidence in relation to PAH emissions in ambient air. Age-adjusted incidence rates of female breast cancer from the surveillance, epidemiology, and end results (SEER) program of the US National Cancer Institute were collected and analyzed using SEER*Stat 8...
May 5, 2018: Medical Oncology
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