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nano aerosol

X S Lv, Y Qiu, Z Y Wang, G M Jiang, Y T Chen, X H Xu, R H Hurt
Iron-based nanoparticles form the basis for a host of sustainable alternative technologies based on this earth-abundant, low-toxicity element that can adopt a variety of oxidation states, crystal phases, and functions. Control of size, shape, and phase stability is a challenge for many nano-iron-based technologies, especially those involving Fe(0) that is susceptible to oxidation under ambient conditions. This article presents a continuous method for hybridizing Fe-based nanoparticles with carbon in the form of graphene-encapsulated Fe-based particles with core-shell symmetry that allows flexible control of iron particle size, shape, and phase stability...
October 1, 2016: Environmental Science. Nano
Еvgeny Kolesnikov, Gopalu Karunakaran, Anna Godymchuk, Levina Vera, Andrey Grigorjevich Yudin, Alexander Gusev, Denis Kuznetsov
Nowadays, the demands for the nanoparticles are increasing due to their tremendous applications in various fields. As a consequence, the discharge of nanoparticles into the atmosphere and environment is also increasing, posing a health threat and environmental damage in terms of pollution. Thus, an extensive research is essential to evaluate the discharge of these nanoparticles into the environment. Keeping this in mind, the present investigation aimed to analyze the discharge of aerosol nanoparticles that are synthesized in the laboratory via chemical precipitation and spray pyrolysis methods...
January 23, 2017: Ecotoxicology and Environmental Safety
László Bencs, Benjamin Horemans, Anna Jolanta Buczyńska, René Van Grieken
The distribution of mass, water-soluble inorganic salts and mineral elements of size-segregated aerosols (PM1, PM2.5-1 and PM10-2.5), precursor gaseous pollutants, black carbon, and nanoparticles (10-300 nm size range) at the Southern Bight of the North Sea has been studied. The concentrations of air pollutants peaked over shipping lanes, open-water anchorage areas and frequently navigated waters, due to the presence of mobile emission sources. A considerable decrease in air pollutant levels was seen when diverting from these marine areas towards remote or coastal banks...
March 2017: Environmental Pollution
Quincy A Hathaway, Cody E Nichols, Danielle L Shepherd, Phoebe A Stapleton, Sarah L Mclaughlin, Janelle C Stricker, Stephanie L Rellick, Mark V Pinti, Alaeddin B Abukabda, Caroll R McBride, Jinghai Yi, Seth M Stine, Timothy R Nurkiewicz, John M Hollander
Nanomaterial production is expanding as new industrial and consumer applications are introduced. Nevertheless, the impacts of exposure to these compounds are not fully realized. The current study was designed to determine whether gestational nano-TiO2 exposure impacts cardiac and metabolic function of developing progeny. Pregnant Sprague Dawley rats were exposed to nano-TiO2 aerosols (~10 mg/m(3), 130 - 150 nm count median aerodynamic diameter) for 7-8 non-consecutive days beginning at gestational day 5-6. Physiological and bioenergetic effects on heart function and cardiomyocytes across three time points: fetal (gestational day 20), neonatal (4-10 days), and young adult (6-12 weeks) were evaluated...
December 23, 2016: American Journal of Physiology. Heart and Circulatory Physiology
Sandra L Blair, Amanda C MacMillan, Greg T Drozd, Allen H Goldstein, Rosalie K Chu, Ljiljana Paša-Tolić, Jared B Shaw, Nikola Tolić, Peng Lin, Julia Laskin, Alexander Laskin, Sergey A Nizkorodov
Secondary organic aerosol (SOA), formed in the photooxidation of diesel fuel, biodiesel fuel, and 20% biodiesel fuel/80% diesel fuel mixture, are prepared under high-NOx conditions in the presence and absence of sulfur dioxide (SO2), ammonia (NH3), and relative humidity (RH). The composition of condensed-phase organic compounds in SOA is measured using several complementary techniques including aerosol mass spectrometry (AMS), high-resolution nanospray desorption electrospray ionization mass spectrometry (nano-DESI/HRMS), and ultrahigh resolution and mass accuracy 21T Fourier transform ion cyclotron resonance mass spectrometry (21T FT-ICR MS)...
January 3, 2017: Environmental Science & Technology
Rohit Mehra, Rajan Jakhu, Pargin Bangotra, Harish Mohan Mittal
Radon ((222)Rn) and its decay products are the major sources of natural radiation exposure to general population. The activity concentrations of unattached and attached short-lived (222)Rn and thoron ((220)Rn) progeny in indoor environment of some dwellings of the Jalandhar and Kapurthala districts of Punjab had been calculated using the deposition-based progeny sensors (DRPS/DTPS) and wire-mesh-capped (DRPS/DTPS) progeny sensors. The observed concentration of attached (222)Rn and (220)Rn progeny showed the variation from 5 to 21 Bq·m(-3) and 0...
October 2016: Dose-response: a Publication of International Hormesis Society
Thomas Loret, Emmanuel Peyret, Marielle Dubreuil, Olivier Aguerre-Chariol, Christophe Bressot, Olivier le Bihan, Tanguy Amodeo, Bénédicte Trouiller, Anne Braun, Christophe Egles, Ghislaine Lacroix
BACKGROUND: Recently, much progress has been made to develop more physiologic in vitro models of the respiratory system and improve in vitro simulation of particle exposure through inhalation. Nevertheless, the field of nanotoxicology still suffers from a lack of relevant in vitro models and exposure methods to predict accurately the effects observed in vivo, especially after respiratory exposure. In this context, the aim of our study was to evaluate if exposing pulmonary cells at the air-liquid interface to aerosols of inhalable and poorly soluble nanomaterials generates different toxicity patterns and/or biological activation levels compared to classic submerged exposures to suspensions...
3, 2016: Particle and Fibre Toxicology
Darius Ceburnis, Agne Masalaite, Jurgita Ovadnevaite, Andrius Garbaras, Vidmantas Remeikis, Willy Maenhaut, Magda Claeys, Jean Sciare, Dominique Baisnée, Colin D O'Dowd
Stable carbon isotope ratios in marine aerosol collected over the Southern Indian Ocean revealed δ(13)C values ranging from -20.0‰ to -28.2‰. The isotope ratios exhibited a strong correlation with the fractional organic matter (OM) enrichment in sea spray aerosol. The base-level isotope ratio of -20.0‰ is characteristic of an aged Dissolved Organic Matter (DOM) pool contributing a relatively homogeneous background level of DOM to oceanic waters. The range of isotope ratios, extending down to -28.2‰, is characteristic of more variable, stronger, and fresher Particulate Organic Matter (POM) pool driven by trophic level interactions...
November 7, 2016: Scientific Reports
Daniela Pelclova, Vladimir Zdimal, Petr Kacer, Martin Komarc, Zdenka Fenclova, Stepanka Vlckova, Nadezda Zikova, Jaroslav Schwarz, Otakar Makes, Tomas Navratil, Sergey Zakharov, Dhimiter Bello
Nanoscale titanium dioxide (nanoTiO2) is a commercially important nanomaterial used in numerous applications. Experimental studies with nanotitania have documented lung injury and inflammation, oxidative stress, and genotoxicity. Production workers in TiO2 manufacturing with a high proportion of nanoparticles and a mixture of other air pollutants, such as gases and organic aerosols, had increased markers of oxidative stress, including DNA and protein damage, as well as lipid peroxidation in their exhaled breath condensate (EBC) compared to unexposed controls...
October 18, 2016: Reviews on Environmental Health
Cindy Bekker, Eef Voogd, Wouter Fransman, Roel Vermeulen
BACKGROUND: Control banding can be used as a first-tier assessment to control worker exposure to nano-objects and their aggregates and agglomerates (NOAA). In a second tier, more advanced modelling approaches are needed to produce quantitative exposure estimates. As currently no general quantitative nano-specific exposure models are available, this study evaluated the validity and applicability of using a generic exposure assessment model (the Advanced REACH Tool-ART) for occupational exposure to NOAA...
November 2016: Annals of Occupational Hygiene
Fabian H L Starsich, Georgios A Sotiriou, Moritz C Wurnig, Christian Eberhardt, Ann M Hirt, Andreas Boss, Sotiris E Pratsinis
Large-scale and reproducible synthesis of nanomaterials is highly sought out for successful translation into clinics. Flame aerosol technology with its proven capacity to manufacture high purity materials (e.g., light guides) up to kg h(-1) is explored here for the preparation of highly magnetic, nonstoichiometric Zn-ferrite (Zn0.4 Fe2.6 O4 ) nanoparticles coated in situ with a nanothin SiO2 layer. The focus is on their suitability as magnetic multifunctional theranostic agents analyzing their T2 contrast enhancing capability for magnetic resonance imaging (MRI) and their magnetic hyperthermia performance...
September 5, 2016: Advanced Healthcare Materials
Jyotilima Saikia, Bardwi Narzary, Sonali Roy, Manobjyoti Bordoloi, Prasenjit Saikia, Binoy K Saikia
Studies on coal-derived nanoparticles as well as nano-minerals are important in the context of the human health and the environment. The coal combustion-generated aerosols also affect human health and environmental quality aspects in any coal-fired station. In this study, the feed coals and their combustion-generated aerosols from coal-fired boilers of two tea industry facilities were investigated for the presence of nanoparticles/nano minerals, fullerene aggregates, and potentially hazardous elements (PHEs)...
December 2016: Chemosphere
Mariko Ago, Siqi Huan, Maryam Borghei, Janne Raula, Esko I Kauppinen, Orlando J Rojas
An aerosol flow reactor was used for the first time for high-throughput, high yield synthesis of spherical lignin particles with given inherent hydrophilicity, depending on the precursor biomolecule. In situ fractionation via Berner type impactor afforded populations with characteristic sizes ranging from ∼30 nm to 2 μm. The as-produced, dry lignin particles displayed excellent mechanical integrity, even after redispersion under high shear in either mineral oil or water. They were effective in the stabilization of oil-in-water (O/W) Pickering emulsions with tunable droplet size, depending on the dimension of the lignin particles used for emulsification...
September 7, 2016: ACS Applied Materials & Interfaces
Lilian Calderón-Garcidueñas
Smoking has serious health effects. Cigarettes, including tobacco, marijuana, and electronic nicotine delivery systems are very effective ways to inhale harmful amounts of fine and ultrafine particulate matter. Does size matter? Yes, indeed! The smaller the particle you inhale, the higher the ability to produce reactive oxygen species and to readily access the brain. In this issue of the Journal of Alzheimer's Disease, Durazzo provides evidence of an association between active cigarette tobacco smoking in cognitively-normal elders and increased cerebral oxidative stress, while in actively smoking Alzheimer's disease (AD) patients, the association was also seen with smaller left and total hippocampal volumes...
July 22, 2016: Journal of Alzheimer's Disease: JAD
Daniela Pelclova, Vladimir Zdimal, Petr Kacer, Zdenka Fenclova, Stepanka Vlckova, Martin Komarc, Tomas Navratil, Jaroslav Schwarz, Nadezda Zikova, Otakar Makes, Kamila Syslova, Jaroslav Belacek, Sergey Zakharov
Human health data regarding exposure to nanoparticles are extremely scarce and biomonitoring of exposure is lacking in spite of rodent pathological experimental data. Potential markers of the health-effects of engineered nanoparticles were examined in 30 workers exposed to TiO2 aerosol, 22 office employees of the same plant, and 45 unexposed controls. Leukotrienes (LT) B4, C4, E4, and D4 were analysed in the exhaled breath condensate (EBC) and urine via liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS)...
June 30, 2016: Journal of Breath Research
Christophe Bressot, Nicolas Manier, Cécile Pagnoux, Olivier Aguerre-Chariol, Martin Morgeneyer
The study presented here focuses on commercial antibacterial tiles whose emissivity of (nano) particles due to abrasion has yet barely been investigated. The tiles have been characterized regarding their surface properties and composition throughout their chain-of-use, i.e. from their state of commercialization until the experimental end-of-service life. In contrast to plane standard tiles, their surfaces form hilly surfaces. In the depressions, titanium dioxide is found at the surface, thus theoretically protected by the hilly areas against abrasion on the tile's surface...
May 27, 2016: Journal of Hazardous Materials
L A Lutsenko, V N Rakitskiy, A V Il'nitskaya, A M Egorova, L L Gvozdeva
The article presents results of studies concerning influence of high-dispersed aerosol formed in traditional plasma processes on operators' health. Consideration also includes new technologies to obtain metall-containing nanoproducts; the authors recommend protection measures for workers, methods and devices to control nano aerosols in air.
2016: Meditsina Truda i Promyshlennaia Ekologiia
Wouter Fransman, Cindy Bekker, Peter Tromp, Willem B Duis
Increasing production and applications of manufactured nano objects (MNOs) have become a source for human exposure and therefore raise concerns and questions about the possible health effects. In this study, the potential release of nano objects, their agglomerates, and aggregates (NOAA) as a result of sanding of hardwood treated with MNOs-containing coating was examined. Two types of MNO-containing coating were compared with untreated hardwood that allowed the evaluation of the influence of the chemical composition on the release of particles...
August 2016: Annals of Occupational Hygiene
Jasmin Tröstl, Wayne K Chuang, Hamish Gordon, Martin Heinritzi, Chao Yan, Ugo Molteni, Lars Ahlm, Carla Frege, Federico Bianchi, Robert Wagner, Mario Simon, Katrianne Lehtipalo, Christina Williamson, Jill S Craven, Jonathan Duplissy, Alexey Adamov, Joao Almeida, Anne-Kathrin Bernhammer, Martin Breitenlechner, Sophia Brilke, Antònio Dias, Sebastian Ehrhart, Richard C Flagan, Alessandro Franchin, Claudia Fuchs, Roberto Guida, Martin Gysel, Armin Hansel, Christopher R Hoyle, Tuija Jokinen, Heikki Junninen, Juha Kangasluoma, Helmi Keskinen, Jaeseok Kim, Manuel Krapf, Andreas Kürten, Ari Laaksonen, Michael Lawler, Markus Leiminger, Serge Mathot, Ottmar Möhler, Tuomo Nieminen, Antti Onnela, Tuukka Petäjä, Felix M Piel, Pasi Miettinen, Matti P Rissanen, Linda Rondo, Nina Sarnela, Siegfried Schobesberger, Kamalika Sengupta, Mikko Sipilä, James N Smith, Gerhard Steiner, Antònio Tomè, Annele Virtanen, Andrea C Wagner, Ernest Weingartner, Daniela Wimmer, Paul M Winkler, Penglin Ye, Kenneth S Carslaw, Joachim Curtius, Josef Dommen, Jasper Kirkby, Markku Kulmala, Ilona Riipinen, Douglas R Worsnop, Neil M Donahue, Urs Baltensperger
About half of present-day cloud condensation nuclei originate from atmospheric nucleation, frequently appearing as a burst of new particles near midday. Atmospheric observations show that the growth rate of new particles often accelerates when the diameter of the particles is between one and ten nanometres. In this critical size range, new particles are most likely to be lost by coagulation with pre-existing particles, thereby failing to form new cloud condensation nuclei that are typically 50 to 100 nanometres across...
26, 2016: Nature
Katrianne Lehtipalo, Linda Rondo, Jenni Kontkanen, Siegfried Schobesberger, Tuija Jokinen, Nina Sarnela, Andreas Kürten, Sebastian Ehrhart, Alessandro Franchin, Tuomo Nieminen, Francesco Riccobono, Mikko Sipilä, Taina Yli-Juuti, Jonathan Duplissy, Alexey Adamov, Lars Ahlm, João Almeida, Antonio Amorim, Federico Bianchi, Martin Breitenlechner, Josef Dommen, Andrew J Downard, Eimear M Dunne, Richard C Flagan, Roberto Guida, Jani Hakala, Armin Hansel, Werner Jud, Juha Kangasluoma, Veli-Matti Kerminen, Helmi Keskinen, Jaeseok Kim, Jasper Kirkby, Agnieszka Kupc, Oona Kupiainen-Määttä, Ari Laaksonen, Michael J Lawler, Markus Leiminger, Serge Mathot, Tinja Olenius, Ismael K Ortega, Antti Onnela, Tuukka Petäjä, Arnaud Praplan, Matti P Rissanen, Taina Ruuskanen, Filipe D Santos, Simon Schallhart, Ralf Schnitzhofer, Mario Simon, James N Smith, Jasmin Tröstl, Georgios Tsagkogeorgas, António Tomé, Petri Vaattovaara, Hanna Vehkamäki, Aron E Vrtala, Paul E Wagner, Christina Williamson, Daniela Wimmer, Paul M Winkler, Annele Virtanen, Neil M Donahue, Kenneth S Carslaw, Urs Baltensperger, Ilona Riipinen, Joachim Curtius, Douglas R Worsnop, Markku Kulmala
The growth of freshly formed aerosol particles can be the bottleneck in their survival to cloud condensation nuclei. It is therefore crucial to understand how particles grow in the atmosphere. Insufficient experimental data has impeded a profound understanding of nano-particle growth under atmospheric conditions. Here we study nano-particle growth in the CLOUD (Cosmics Leaving OUtdoors Droplets) chamber, starting from the formation of molecular clusters. We present measured growth rates at sub-3 nm sizes with different atmospherically relevant concentrations of sulphuric acid, water, ammonia and dimethylamine...
May 20, 2016: Nature Communications
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