keyword
MENU ▼
Read by QxMD icon Read
search

air particle

keyword
https://www.readbyqxmd.com/read/28107509/development-of-combining-of-human-bronchial-mucosa-models-with-xposeali%C3%A2-for-exposure-of-air-pollution-nanoparticles
#1
Jie Ji, Anna Hedelin, Maria Malmlöf, Vadim Kessler, Gulaim Seisenbaeva, Per Gerde, Lena Palmberg
BACKGROUND: Exposure to agents via inhalation is of great concerns both in workplace environment and in the daily contact with particles in the ambient air. Reliable human airway exposure systems will most likely replace animal experiment in future toxicity assessment studies of inhaled agents. METHODS: In this study, we successfully established a combination of an exposure system (XposeALI) with 3D models mimicking both healthy and chronic bronchitis-like mucosa by co-culturing human primary bronchial epithelial cells (PBEC) and fibroblast at air-liquid interface (ALI)...
2017: PloS One
https://www.readbyqxmd.com/read/28106813/transcriptome-profiling-of-the-lungs-reveals-molecular-clock-genes-expression-changes-after-chronic-exposure-to-ambient-air-particles
#2
Pengcheng Song, Zhigang Li, Xiaoqian Li, Lixin Yang, Lulu Zhang, Nannan Li, Chen Guo, Shuyu Lu, Yongjie Wei
The symptoms of asthma, breathlessness, insomnia, etc. all have relevance to pulmonary rhythmic disturbances. Epidemiology and toxicology studies have demonstrated that exposure to ambient air particles can result in pulmonary dysfunction. However, there are no data directly supporting a link between air pollution and circadian rhythm disorder. In the present study, we found that breathing highly polluted air resulted in changes of the molecular clock genes expression in lung by transcriptome profiling analyses in a rodent model...
January 18, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28104885/transformation-of-bulk-alloys-to-oxide-nanowires
#3
Danni Lei, Jim Benson, Alexandre Magasinski, Gene Berdichevsky, Gleb Yushin
One dimensional (1D) nanostructures offer prospects for enhancing the electrical, thermal, and mechanical properties of a broad range of functional materials and composites, but their synthesis methods are typically elaborate and expensive. We demonstrate a direct transformation of bulk materials into nanowires under ambient conditions without the use of catalysts or any external stimuli. The nanowires form via minimization of strain energy at the boundary of a chemical reaction front. We show the transformation of multimicrometer-sized particles of aluminum or magnesium alloys into alkoxide nanowires of tunable dimensions, which are converted into oxide nanowires upon heating in air...
January 20, 2017: Science
https://www.readbyqxmd.com/read/28102779/long-term-dust-aerosol-production-from-natural-sources-in-iceland
#4
Pavla Dagsson-Waldhauserova, Olafur Arnalds, Haraldur Olafsson
: Iceland is a volcanic island in the North Atlantic Ocean with maritime climate. In spite of moist climate, large areas are with limited vegetation cover where >40% of Iceland is classified with considerable to very severe erosion and 21% of Iceland is volcanic sandy deserts. Not only do natural emissions from these sources influenced by strong winds affect regional air quality in Iceland ("Reykjavik haze"), but dust particles are transported over the Atlantic ocean and Arctic Ocean >1000 km at times...
February 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28102690/ph-sensitive-adsorption-behavior-of-polymer-particles-at-the-air-water-interface
#5
Syuji Fujii, Emiko Mouri, Ko Akiyama, Saori Nakayama, Kyohei Uda, Yoshinobu Nakamura, Hideki Matsuoka
pH-Sensitive adsorption of polymer particles bearing poly[2-(dimethylamino)ethyl methacrylate] hairs at the air-water interface was investigated using a surface tensiometer, a Langmuir-Blodgett trough and an X-ray reflectometer. We clarified that the particles adsorb at the interface at basic pH; by contrast, at acidic pH, a small number of particles are adsorbed, whereas the majority are dispersed in the water phase. X-ray reflectometry analysis revealed that a particle monolayer was formed at the air-water interface, which packed densely under increasing surface pressure, as determined by the electron density profile change...
January 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28101367/contribution-of-point-and-small-scaled-sources-to-the-pm10-emission-using-positive-matrix-factorization-model
#6
Zohre Farahmandkia, Faramarz Moattar, Farid Zayeri, Mohamad Sadegh Sekhavatjou, Nabiollah Mansouri
BACKGROUND: The positive matrix factorization is a powerful environmental analysis technique which has been successfully utilized to assess air-born particulate matter source contribution. The new version of this model (PMF5) has two additional estimation error methods and some other useful advantages compared to the previous versions. In the present study, the capability of PMF5 for identification and contribution of small size particle source to the ambient particulate matter was evaluated...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/28100417/long-range-and-regional-transported-size-resolved-atmospheric-aerosols-during-summertime-in-urban-shanghai
#7
Xiaoxiao Ding, Lingdong Kong, Chengtian Du, Assiya Zhanzakova, Lin Wang, Hongbo Fu, Jianmin Chen, Xin Yang, Tiantao Cheng
In this study, the concentrations of water soluble ions (WSI), organic carbon (OC), and elemental carbon (EC) of size-resolved (0.056-18μm) atmospheric aerosols were measured in July and August 2015 in Shanghai, China. Backward trajectory model and potential source contribution function (PSCF) model were used to identify the potential source distributions of size-resolved particles and PM1.8-associated atmospheric inorganic and carbonaceous aerosols. The results showed that the average mass concentrations of PM0...
January 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28098262/quantification-of-the-sources-and-composition-of-particulate-matter-by-field-deployable-mass-spectrometry-implications-for-air-quality-and-public-health
#8
Patrick L Hayes
Airborne particulate matter less than 2.5 μm in diameter (PM2.5) negatively impacts air quality in cities throughout the world where it has been linked to increased cardiac and respiratory morbidity and mortality. For this reason PM2.5 standards have been established by many countries and the World Health Organization. However, these guidelines are regularly exceeded in North America, Europe and East Asia. While PM2.5 is often reported as a single atmospheric species, it is actually a mixture of organic and inorganic compounds...
January 18, 2017: Analyst
https://www.readbyqxmd.com/read/28097461/sonoelectrochemical-synthesis-of-nano-zinc-ii-complex-with-2-methyl-8-hydroxyquinoline-ligand-a-precursor-to-produce-pure-phase-nano-sized-zinc-ii-oxide
#9
Vida Jodaian, Akram Shahrjerdi, Pari Mirahmadpour
A new zinc complex, [Zn(mq)2], (mq = 2-methyl-8-hydroxyquinoline) was prepared via an electrochemical route from the oxidation of zinc metal in the presence of 2-methyl-8-hydroxyquinoline in a fast and facile process. The complex was fully characterized by means of NMR and IR spectra and elemental analysis. The nanostructure of the prepared compound was obtained by sonoelectrochemical process and studied by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analysis. Thermal stability of crystalline bulk and nano-size samples of the prepared compound was studied by thermal gravimetric and differential thermal analysis...
January 17, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28095687/patterned-poly-dopamine-films-for-enhanced-cell-adhesion
#10
Xi Chen, Christina Cortez-Jugo, Gwan H Choi, Mattias Björnmalm, Yunlu Dai, Pil J Yoo, Frank Caruso
Engineered materials that promote cell adhesion and cell growth are important in tissue engineering and regenerative medicine. In this work, we produced poly(dopamine) (PDA) films with engineered patterns for improved cell adhesion. The patterned films were synthesized via the polymerization of dopamine at the air-water interface of a floating bed of spherical particles. Subsequent dissolution of the particles yielded free-standing PDA films with tunable geometrical patterns. Our results show that these patterned PDA films significantly enhance the adhesion of both cancer cells and stem cells, thus showing promise as substrates for cell attachment for various biomedical applications...
January 18, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28093299/freeze-concentration-induced-plga-and-polystyrene-nanoparticle-aggregation-imaging-and-rational-design-of-lyoprotection
#11
Lin Niu, Jayanth Panyam
Long-term storage of stable nanoparticulate systems is critical to the utilization of nanotechnology in biomedical applications. Freeze-drying or lyophilization is the most commonly used approach to preparing stable injectable nano formulations. A detailed understanding of the freezing stress on nanoparticles is essential to the successful preservation of original particle attributes and to the development of reliable lyophilization processes. However, visualization of the freezing process and the underlying mechanisms that result in particle aggregation remains challenging...
January 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28092754/public-participation-gis-for-improving-wood-burning-emissions-from-residential-heating-and-urban-environmental-management
#12
Susana López-Aparicio, Matthias Vogt, Philipp Schneider, Maarit Kahila-Tani, Anna Broberg
A crowdsourcing study supported by a public participation GIS tool was designed and carried out in two Norwegian regions. The aim was to improve the knowledge about emissions from wood burning for residential heating in urban areas based on the collection of citizens' localized insights. We focus on three main issues: 1) type of dwelling and residential heating source; 2) wood consumption and type of wood appliances; and 3) citizens' perception of the urban environment. Our study shows the importance of wood burning for residential heating, and of the resulted particle emissions, in Norwegian urban areas...
January 13, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28092630/comparative-monte-carlo-study-on-the-performance-of-integration-and-list-mode-detector-configurations-for-carbon-ion-computed-tomography
#13
Sebastian Meyer, Chiara Gianoli, Lorena Magallanes, Benedikt Kopp, Thomas Tessonnier, Guillaume Landry, George Dedes, Bernd Voss, Katia Parodi
Ion beam therapy offers the possibility of a highly conformal tumor-dose distribution; however, this technique is extremely sensitive to inaccuracies in the treatment procedures. Ambiguities in the conversion of Hounsfield units of the treatment planning x-ray CT to relative stopping power (RSP) can cause uncertainties in the estimated ion range of up to several millimeters. Ion CT (iCT) represents a favorable solution allowing to directly assess the RSP. In this simulation study we investigate the performance of the integration-mode configuration for carbon iCT, in comparison with a single-particle approach under the same set-up...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28090122/effect-of-static-vs-dynamic-imaging-on-particle-transport-in-ct-based-numerical-models-of-human-central-airways
#14
Shinjiro Miyawaki, Eric A Hoffman, Ching-Long Lin
Advances in quantitative computed tomography (CT) has provided methods to assess the detailed structure of the pulmonary airways and parenchyma, providing the means of applying computational fluid dynamics-based modeling to better understand subject-specific differences in structure-to-function relationships. Most of the previous numerical studies, seeking to predict patterns of inhaled particle deposition, have considered airway geometry and regional ventilation derived from static images. Because geometric alterations of the airway and parenchyma associated with regional ventilation may greatly affect particle transport, we have sought to investigate the effect of rigid vs...
October 2016: Journal of Aerosol Science
https://www.readbyqxmd.com/read/28089413/relation-of-st-segment-elevation-myocardial-infarction-to-daily-ambient-temperature-and-air-pollutant-levels-in-a-japanese-nationwide-percutaneous-coronary-intervention-registry
#15
Kyohei Yamaji, Shun Kohsaka, Takeshi Morimoto, Kenshi Fujii, Tetsuya Amano, Shiro Uemura, Takashi Akasaka, Kazushige Kadota, Masato Nakamura, Takeshi Kimura
Effects of daily fluctuation of ambient temperature and concentrations of air pollutants on acute cardiovascular events have not been well studied. From January 2011 to December 2012, a total of 56,863 consecutive ST-segment elevation myocardial infarction (STEMI) patients who underwent primary percutaneous coronary intervention were registered from 929 institutes with median interinstitutional distance of 2.6 km. We constructed generalized linear mixed models in which the presence or absence of patients with STEMI per day per institute was included as a binomial response variable, with daily meteorologic and environmental data obtained from their respective observatories nearest to the institutes (median distance of 9...
December 18, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/28088726/fabrication-of-highly-hydrophilic-filter-using-natural-and-hydrothermally-treated-mica-nanoparticles-for-efficient-waste-oil-water-separation
#16
Udara Bimendra Gunatilake, Jayasundera Bandara
For the effective oil/water separation, a novel superhydrophilic (underwater superoleophobic) filter is fabricated with the naturally and hydrothermally treated mica particles. To fabricate a double layered filter, hydrothermally treated mica particles were initially electrodeposited on a stainless steel mesh and a natural mica particles were sprayed on the first hydrothermally deposited mica layer. The double layered mica coated membrane showed superamphiphilic and superhydrophilic/superoleophobic (contact angle >159°) characteristics in air and underwater respectively...
January 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28088022/valorization-of-aluminum-scrap-via-an-acid-washing-treatment-for-reductive-removal-of-toxic-bromate-from-water
#17
Kun-Yi Andrew Lin, Jia-Yin Lin, Hsing-Lung Lien
Aluminum scrap (AS) is adopted for the first time as a readily available aluminum source to prepare zero-valent aluminum (ZVAl) for removing bromate from water via a reductive reaction. Since aluminum is easily oxidized to aluminum oxide (Al2O3) on exposure to air, an acid-washing pretreatment on AS is developed to remove the layer of Al2O3. HCl is found as the most effective acid to pretreat AS and the HCl-pretreated or acid-washed AS (AWAS) is able to remove bromate from water and convert it to bromide. Factors, such as temperature, pH, co-existing anions, and particle size, which influence the bromate removal using AWAS are also investigated...
January 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28087836/neuropathological-consequences-of-gestational-exposure-to-concentrated-ambient-fine-and-ultrafine-particles-in-the-mouse
#18
Carolyn Klocke, Joshua L Allen, Marissa Sobolewski, Margot Mayer-Pröschel, Jason L Blum, Dana Lauterstein, Judith T Zelikoff, Deborah A Cory-Slechta
Increasing evidence indicates that the central nervous system (CNS) is a target of air pollution. We previously reported that postnatal exposure of mice to concentrated ambient ultrafine particles (UFP; ≤100nm) via the University of Rochester HUCAPS system during a critical developmental window of CNS development, equivalent to human 3(rd) trimester, produced male-predominant neuropathological and behavioral characteristics common to multiple neurodevelopmental disorders, including autism spectrum disorder (ASD), in humans...
January 13, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28075569/inlet-particle-sorting-cyclone-for-the-enhancement-of-pm2-5-separation
#19
Pengbo Fu, Fei Wang, Xue-Jing Yang, Liang Ma, Xin Cui, Hualin Wang
Many cities are suffering from severe air pollution from fine particulate matter. Cyclone is an effective separator for particulate pollutant but has low efficiency for those with an aerodynamic diameter of 2.5 μm or less (PM2.5). In this research, four novel inlet particle-sorting cyclones were first developed to enhance the separation of PM2.5. The energy consumption, overall separation efficiency, particle grade efficiency,outlet particle concentration and size distribution were compared with common cyclone (CM-C)...
January 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28074880/tailoring-mechanically-robust-poly-m-phenylene-isophthalamide-nanofiber-nets-for-ultrathin-high-efficiency-air-filter
#20
Shichao Zhang, Hui Liu, Xia Yin, Zhaoling Li, Jianyong Yu, Bin Ding
Effective promotion of air filtration applications proposed for fibers requires their real nanoscale diameter, optimized pore structure, and high service strength; however, creating such filter medium has proved to be a tremendous challenge. This study first establishes a strategy to design and fabricate novel poly(m-phenylene isophthalamide) nanofiber/nets (PMIA NF/N) air filter via electrospinning/netting. Our strategy results in generation of a bimodal structure including a scaffold of nanofibers and abundant two-dimensional ultrathin (~20 nm) nanonets to synchronously construct PMIA filters by combining solution optimization, humidity regulation, and additive inspiration...
January 11, 2017: Scientific Reports
keyword
keyword
121164
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"