keyword
MENU ▼
Read by QxMD icon Read
search

Air quality

keyword
https://www.readbyqxmd.com/read/28812981/the-experimental-study-on-the-emanation-power-of-a-flow-through-thoron-source-made-from-incandescent-gas-mantles
#1
Yunxiang Wang, Lei Zhang, Qiuju Guo
To improve the quality of the calibration of thoron concentration activity measurement, an experimental study on the emanation power of a flow-through thoron source based on incandescent gas mantles was carried out in this paper. The thoron activity concentrations of the outflowed air from the flow-through source were measured using RAD7, and the quantitative relationship between thoron concentrations and flowrates was studied through theoretical analysis, and the thoron emanation powers were obtained from the fitting of the relationship above...
August 16, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28811594/spatio-temporal-variations-of-pm2-5-concentrations-and-the-evaluation-of-emission-reduction-measures-during-two-red-air-pollution-alerts-in-beijing
#2
Nianliang Cheng, Dawei Zhang, Yunting Li, Xiaoming Xie, Ziyue Chen, Fan Meng, Bingbo Gao, Bin He
To effectively improve air quality during pollution episodes, Beijing released two red alerts in 2015. Here we examined spatio-temporal variations of PM2.5 concentrations during two alerts based on multiple data sources. Results suggested that PM2.5 concentrations varied significantly across Beijing. PM2.5 concentrations in southern parts of Beijing were higher than those in northern areas during both alerts. In addition to unfavorable meteorological conditions, coal combustion, especially incomplete coal combustion contributed significantly to the high PM2...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810512/co-digestion-of-rice-straw-and-cow-dung-to-supply-cooking-fuel-and-fertilizers-in-rural-india-impact-on-human-health-resource-flows-and-climate-change
#3
Sophie Sfez, Steven De Meester, Jo Dewulf
Anaerobic digestion of cow dung with new feedstock such as crop residues to increase the biogas potential is an option to help overcoming several issues faced by India. Anaerobic digestion provides biogas that can replace biomass cooking fuels and reduce indoor air pollution. It also provides digestate, a fertilizer that can contribute to compensate nutrient shortage on agricultural land. Moreover, it avoids the burning of rice straw in the fields which contributes to air pollution in India and climate change globally...
August 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28810209/benefits-of-the-fire-mitigation-ecosystem-service-in-the-great-dismal-swamp-national-wildlife-refuge-virginia-usa
#4
Bryan Parthum, Emily Pindilli, Dianna Hogan
The Great Dismal Swamp (GDS) National Wildlife Refuge delivers multiple ecosystem services, including air quality and human health via fire mitigation. Our analysis estimates benefits of this service through its potential to reduce catastrophic wildfire related impacts on the health of nearby human populations. We used a combination of high-frequency satellite data, ground sensors, and air quality indices to determine periods of public exposure to dense emissions from a wildfire within the GDS. We examined emergency department (ED) visitation in seven Virginia counties during these periods, applied measures of cumulative Relative Risk to derive the effects of wildfire smoke exposure on ED visitation rates, and estimated economic losses using regional Cost of Illness values established within the US Environmental Protection Agency BenMAP framework...
August 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28805887/characterizing-ammonia-emissions-from-horses-fed-different-crude-protein-concentrations
#5
J Weir, H Li, L K Warren, E Macon, C Wickens
Evaluating impact of animal agriculture on air quality has been the focus of recent research. Ammonia (NH) volatilization occurs when undigested protein in feces and urea in urine is broken down by bacteria and enzymes. Information regarding NH emission from equine facilities is limited, and effects of CP intake on NH emissions have not been investigated. Nine mature geldings were used in a 3 × 3 replicated Latin square design study to determine effects of dietary CP on potential NH losses from feces and urine...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28805684/miniaturized-monitors-for-assessment-of-exposure-to-air-pollutants-a-review
#6
REVIEW
Francesca Borghi, Andrea Spinazzè, Sabrina Rovelli, Davide Campagnolo, Luca Del Buono, Andrea Cattaneo, Domenico M Cavallo
Air quality has a huge impact on different aspects of life quality, and for this reason, air quality monitoring is required by national and international regulations. Technical and procedural limitations of traditional fixed-site stations for monitoring or sampling of air pollutants are also well-known. Recently, a different type of miniaturized monitors has been developed. These monitors, due to their characteristics (e.g., low cost, small size, high portability) are becoming increasingly important for individual exposure assessment, especially since this kind of instrument can provide measurements at high spatial and temporal resolution, which is a notable advantage when approaching assessment of exposure to environmental contaminants...
August 12, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28803162/-impact-of-air-pollution-in-paediatric-consultations-in-primary-health-care-ecological-study
#7
Raquel Martín Martín, Marciano Sánchez Bayle
OBJECTIVE: To study the correlation between the levels of environmental pollutants and the number of paediatric consultations related to respiratory disease in Primary Health Care. PATIENTS AND METHODS: An ecological study is performed, in which the dependent variable analysed was the number of paediatric consultations in an urban Primary Health Care centre in Madrid over a 3 year period (2013-2015), and specifically the consultations related to bronchiolitis, recurrent bronchospasm, and upper respiratory diseases...
August 9, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28800689/evaluation-of-edar-vehicle-emissions-remote-sensing-technology
#8
Karl Ropkins, Timothy H DeFries, Francis Pope, David C Green, Jim Kemper, Sandeep Kishan, Gary W Fuller, Hu Li, Jim Sidebottom, Leigh R Crilley, Louisa Kramer, William J Bloss, J Stewart Hager
Despite much work in recent years, vehicle emissions remain a significant contributor in many areas where air quality standards are under threat. Policy-makers are actively exploring options for next generation vehicle emission control and local fleet management policies, and new monitoring technologies to aid these activities. Therefore, we report here on findings from two separate but complementary blind evaluation studies of one new-to-market real-world monitoring option, HEAT LLC's Emission Detection And Reporting system or EDAR, an above-road open path instrument that uses Differential Absorption LIDAR to provide a highly sensitive and selective measure of passing vehicle emissions...
August 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28800688/monitoring-of-air-pollution-levels-related-to-charilaos-trikoupis-bridge
#9
D A Sarigiannis, E J Handakas, M Kermenidou, I Zarkadas, A Gotti, P Charisiadis, K Makris, M Manousakas, K Eleftheriadis, S P Karakitsios
Charilaos Trikoupis bridge is the longest cable bridge in Europe that connects Western Greece with the rest of the country. In this study, six air pollution monitoring campaigns (including major regulated air pollutants) were carried out from 2013 to 2015 at both sides of the bridge, located in the urban areas of Rio and Antirrio respectively. Pollution data were statistically analyzed and air quality was characterized using US and European air quality indices. From the overall campaign, it was found that air pollution levels were below the respective regulatory thresholds, but once at the site of Antirrio (26...
August 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28800484/characteristics-of-elemental-and-pb-isotopic-compositions-in-aerosols-pm10-2-5-at-the-ieodo-ocean-research-station-in-the-east-china-sea
#10
Sanghee Lee, Changhee Han, Daechol Shin, Soon Do Hur, Seong Joon Jun, Young-Taeg Kim, Do-Seong Byun, Sungmin Hong
A total of 82 aerosol samples (PM10-2.5) were collected from June 18, 2015 to October 1, 2016 at the remote sea site, the Ieodo Ocean Research Station (IORS), in the East China Sea. Samples were analyzed for 10 elements (Al, Fe, Cu, Zn, As, Mo, Cd, Sb, Tl, and Pb) as well as Pb isotopic composition to characterize temporal variations in elemental concentration levels, and to identify the potential source regions of atmospheric pollutants transported over the remote East China Sea. The results showed that the annual average element concentrations were lowest compared to those at different sites in East Asia, suggesting a very clean background area of IORS, with values ranging from 114 ng m(-3) for Al to 0...
August 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28798972/diagnostic-precision-of-triage-algorithms-for-mass-casualty-incidents-english-version
#11
A R Heller, N Salvador, M Frank, J Schiffner, R Kipke, C Kleber
BACKGROUND: Regarding survival and quality of life recent mass casualty incidents again emphasize the importance of early identification of the correct degree of injury/illness to enable prioritization of treatment amongst patients and their transportation to an appropriate hospital. The present study investigated existing triage algorithms in terms of sensitivity (SE) and specificity (SP) as well as its process duration in a relevant emergency patient cohort. METHODS: In this study 500 consecutive air rescue missions were evaluated by means of standardized patient records...
August 10, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28798214/role-of-atmospheric-pollution-on-the-natural-history-of-idiopathic-pulmonary-fibrosis
#12
Lucile Sesé, Hilario Nunes, Vincent Cottin, Shreosi Sanyal, Morgane Didier, Zohra Carton, Dominique Israel-Biet, Bruno Crestani, Jacques Cadranel, Benoit Wallaert, Abdellatif Tazi, Bernard Maître, Grégoire Prévot, Sylvain Marchand-Adam, Stéphanie Guillot-Dudoret, Annelyse Nardi, Sandra Dury, Violaine Giraud, Anne Gondouin, Karine Juvin, Raphael Borie, Marie Wislez, Dominique Valeyre, Isabella Annesi-Maesano
INTRODUCTION: Idiopathic pulmonary fibrosis (IPF) has an unpredictable course corresponding to various profiles: stability, physiological disease progression and rapid decline. A minority of patients experience acute exacerbations (AEs). A recent study suggested that ozone and nitrogen dioxide might contribute to the occurrence of AE. We hypothesised that outdoor air pollution might influence the natural history of IPF. METHODS: Patients were selected from the French cohort COhorte FIbrose (COFI), a national multicentre longitudinal prospective cohort of IPF (n=192)...
August 10, 2017: Thorax
https://www.readbyqxmd.com/read/28798197/corp-measurement-of-lung-function-in-small-animals
#13
Jason H T Bates
The measurement of lung function in mice and rats is crucial for understanding how well small animal models of pulmonary disease recapitulate human clinical pathology, but brings with it the challenge of making accurate measurements in animals as small as a mouse. Overcoming these challenges can be achieved in a number of ways, each based on a model idealization of how the lung works as a mechanical system. Accordingly, it is important to understand the theoretical basis on which an assessment of lung function rests in order to interpret experimental measurements appropriately...
August 10, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28796545/use-of-mdct-to-assess-the-results-of-bronchial-thermoplasty
#14
Matheus Zanon, Débora L Strieder, Adalberto S Rubin, Guilherme Watte, Edson Marchiori, Paulo F G Cardoso, Bruno Hochhegger
OBJECTIVE: The purpose of this study was to evaluate the use of MDCT to assess response to bronchial thermoplasty treatment for severe persistent asthma. MATERIALS AND METHODS: MDCT data from 26 patients with severe persistent asthma who underwent imaging before and after bronchial thermoplasty were analyzed retrospectively. Changes in the following parameters were assessed: total lung volume, mean lung density, airway wall thickness, CT air trapping index (attenuation < -856 HU), and expiratory-inspiratory ratio of mean lung density (E/I index)...
August 10, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28796509/predicting-thermal-behavior-of-secondary-organic-aerosols
#15
John H Offenberg, Michael Lewandowski, Tadeusz E Kleindienst, Kenneth S Docherty, Mohammed Jaoui, Jonathan Krug, Theran P Riedel, David A Olson
Volume concentrations of secondary organic aerosol (SOA) are measured in 139 steady-state, single precursor hydrocarbon oxidation experiments after passing through a temperature controlled inlet. The response to change in temperature is well predicted through a feedforward Artificial Neural Network. The most parsimonious model, as indicated by Akaike's Information Criterion, Corrected (AIC,C), utilizes 11 input variables, a single hidden layer of 4 tanh activation function nodes, and a single linear output function...
August 10, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28794573/quantitative-assessment-of-pm2-5-sources-and-their-seasonal-variation-in-krakow
#16
Lucyna Samek, Z Stegowski, L Furman, K Styszko, K Szramowiat, J Fiedor
In industry areas of Poland such as Silesia or urban sites like Krakow and some other cities, the levels of pollutants frequently breach air quality standards. Particulate matter (PM) is the most important constituent of atmospheric pollution. Beginning on 1st February 2014 until 31st January 2015, the samples of fine particulate matter PM2.5 (aerodynamic diameter of particles less than or equal to 2.5 μm) were collected at a site in the south-eastern Krakow urban background area. During this period, 194 samples were taken...
2017: Water, Air, and Soil Pollution
https://www.readbyqxmd.com/read/28792949/does-environmental-policy-affect-scaling-laws-between-population-and-pollution-evidence-from-american-metropolitan-areas
#17
Nicholas Z Muller, Akshaya Jha
Modern cities are engines of production, innovation, and growth. However, urbanization also increases both local and global pollution from household consumption and firms' production. Do emissions change proportionately to city size or does pollution tend to outpace or lag urbanization? Do emissions scale differently with population versus economic growth or are emissions, population, and economic growth inextricably linked? How are the scaling relationships between emissions, population, and economic growth affected by environmental regulation? This paper examines the link between urbanization, economic growth and pollution using data from Metropolitan Statistical Areas (MSAs) in the United States between 1999 and 2011...
2017: PloS One
https://www.readbyqxmd.com/read/28783215/sensitization-to-dust-mite-defines-different-phenotypes-of-asthma-a-multicenter-study
#18
Silvia Ruggieri, Gaspare Drago, Valeria Longo, Paolo Colombo, Martin Balzan, David Bilocca, Christopher Zammit, Stephen Montefort, Gianluca Scaccianoce, Giuseppina Cuttitta, Giovanni Viegi, Fabio Cibella
BACKGROUND: Indoor allergens are risk factors for asthma: thus, the characterization of indoor air quality is important for studying environment-health relationships in children. In particular, Dermatophagoides pteronyssinus is the dominant allergen for asthma. We cross-sectionally investigated the relationships among respiratory symptoms and function, airway inflammation, allergen sensitization and indoor allergen concentration. METHODS: One hundred thirty two children aging 10-14 years and living in a Southern Mediterranean area were evaluated by parental questionnaires...
August 7, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28783065/assessing-the-utility-of-low-cost-particulate-matter-sensors-over-a-12-week-period-in-the-cuyama-valley-of-california
#19
Anondo Mukherjee, Levi G Stanton, Ashley R Graham, Paul T Roberts
The use of low-cost air quality sensors has proliferated among non-profits and citizen scientists, due to their portability, affordability, and ease of use. Researchers are examining the sensors for their potential use in a wide range of applications, including the examination of the spatial and temporal variability of particulate matter (PM). However, few studies have quantified the performance (e.g., accuracy, precision, and reliability) of the sensors under real-world conditions. This study examined the performance of two models of PM sensors, the AirBeam and the Alphasense Optical Particle Counter (OPC-N2), over a 12-week period in the Cuyama Valley of California, where PM concentrations are impacted by wind-blown dust events and regional transport...
August 5, 2017: Sensors
https://www.readbyqxmd.com/read/28782941/integrating-aln-with-gdn-thin-films-in-an-in-situ-cvd-process-influence-on-the-oxidation-and-crystallinity-of-gdn
#20
Stefan Cwik, Sebastian M J Beer, Stefanie Hoffmann, Michael Krasnopolski, Detlef Rogalla, Hans-Werner Becker, Daniel Peeters, Andreas Ney, Anjana Devi
The application potential of rare earth nitride (REN) materials has been limited due to their high sensitivity to air and moisture leading to facile oxidation upon exposure to ambient conditions. For the growth of device quality films, physical vapor deposition methods, such as molecular beam epitaxy, have been established in the past. In this regard, aluminum nitride (AlN) has been employed as a capping layer to protect the functional gadolinium nitride (GdN) from interaction with the atmosphere. In addition, an AlN buffer was employed between a silicon substrate and GdN serving as a seeding layer for epitaxial growth...
August 16, 2017: ACS Applied Materials & Interfaces
keyword
keyword
38721
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"