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https://www.readbyqxmd.com/read/27913957/chemical-characterization-of-rainwater-at-a-high-altitude-site-nainital-in-the-central-himalayas-india
#1
Deewan Singh Bisht, A K Srivastava, H Joshi, K Ram, N Singh, M Naja, M K Srivastava, S Tiwari
The present study investigates the chemical composition of rainwater (RW) from a high-altitude site "Nainital" (1958 m above msl) in the central Himalaya region, to understand the influence of local, regional, and long-range transport of pollutants. A total of 55 (2 in pre-monsoon and 53 in monsoon) RW samples were collected during the study period (June-September 2012) and were analyzed for major anions and cations using an ion chromatograph. The pH of precipitation events ranged from 4.95 to 6.50 (average 5...
December 2, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27913032/intervention-studies-of-inhaled-corticosteroids-combined-with-long-acting-theophylline-or-long-acting-%C3%AE-2-agonists-in-patients-with-moderate-to-severe-asthma-a-randomized-controlled-study
#2
Yan Wang, Ping Chen, Anna Dai, Shengyun Shang, Lingfei Kong
PURPOSE: To evaluate and contrast the therapeutic effect and safety of fluticasone aerosol combined with theophylline tablets in patients with moderate to severe asthma, compared with salmeterol/fluticasone propionate aerosol. METHODS: After a screening period, patients meeting the inclusion criteria were randomly assigned to the experiment group (fluticasone aerosol combined with theophylline tablets) or the control group (salmeterol/fluticasone aerosol combined with placebo tablets) for 12 weeks of treatment...
November 29, 2016: Clinical Therapeutics
https://www.readbyqxmd.com/read/27913014/characterizations-of-atmospheric-particulate-bound-mercury-in-the-kathmandu-valley-of-nepal-south-asia
#3
Junming Guo, Shichang Kang, Jie Huang, Qianggong Zhang, Maheswar Rupakheti, Shiwei Sun, Lekhendra Tripathee, Dipesh Rupakheti, Arnico K Panday, Mika Sillanpää, Rukumesh Paudyal
The Kathmandu Valley, located in the Himalayan foothills in Nepal, is heavily polluted. In order to investigate ambient particulate-bound mercury (Hg) in the Kathmandu Valley, a total 64 total suspended particulates (TSP) samples were collected from a sub-urban site in the Kathmandu Valley, the capital region of Nepal during a sampling period of an entire year (April 2013-April 2014). They were analyzed for ambient particulate-bound Hg (PBM) using thermal desorption combined with cold vapor atomic spectroscopy...
November 30, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27911802/aerosol-indirect-effect-from-turbulence-induced-broadening-of-cloud-droplet-size-distributions
#4
Kamal Kant Chandrakar, Will Cantrell, Kelken Chang, David Ciochetto, Dennis Niedermeier, Mikhail Ovchinnikov, Raymond A Shaw, Fan Yang
The influence of aerosol concentration on the cloud-droplet size distribution is investigated in a laboratory chamber that enables turbulent cloud formation through moist convection. The experiments allow steady-state microphysics to be achieved, with aerosol input balanced by cloud-droplet growth and fallout. As aerosol concentration is increased, the cloud-droplet mean diameter decreases, as expected, but the width of the size distribution also decreases sharply. The aerosol input allows for cloud generation in the limiting regimes of fast microphysics ([Formula: see text]) for high aerosol concentration, and slow microphysics ([Formula: see text]) for low aerosol concentration; here, [Formula: see text] is the phase-relaxation time and [Formula: see text] is the turbulence-correlation time...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27910849/hydroxyl-radical-induced-formation-of-highly-oxidized-organic-compounds
#5
Torsten Berndt, Stefanie Richters, Tuija Jokinen, Noora Hyttinen, Theo Kurtén, Rasmus V Otkjær, Henrik G Kjaergaard, Frank Stratmann, Hartmut Herrmann, Mikko Sipilä, Markku Kulmala, Mikael Ehn
Explaining the formation of secondary organic aerosol is an intriguing question in atmospheric sciences because of its importance for Earth's radiation budget and the associated effects on health and ecosystems. A breakthrough was recently achieved in the understanding of secondary organic aerosol formation from ozone reactions of biogenic emissions by the rapid formation of highly oxidized multifunctional organic compounds via autoxidation. However, the important daytime hydroxyl radical reactions have been considered to be less important in this process...
December 2, 2016: Nature Communications
https://www.readbyqxmd.com/read/27908385/the-mutagenic-assessment-of-an-electronic-cigarette-and-reference-cigarette-smoke-using-the-ames-assay-in-strains-ta98-and-ta100
#6
D Thorne, I Crooks, M Hollings, A Seymour, C Meredith, M Gaca
Salmonella typhimurium strains TA98 and TA100 were used to assess the mutagenic potential of the aerosol from a commercially available, rechargeable, closed system electronic-cigarette. Results obtained were compared to those for the mainstream smoke from a Kentucky reference (3R4F) cigarette. Two different test matrices were assessed. Aerosol generated from the e-cigarette was trapped on a Cambridge filter pad, eluted in DMSO and compared to cigarette smoke total particulate matter (TPM), which was generated in the same manner for mutagenicity assessment in the Salmonella assay...
December 2016: Mutation Research
https://www.readbyqxmd.com/read/27905700/use-of-ozone-depleting-substances-direct-final-rule
#7
(no author information available yet)
The Food and Drug Administration (FDA, the Agency, or we) is amending its regulation on uses of ozone-depleting substances (ODSs), including chlorofluorocarbons (CFCs), to remove the designation for certain products as "essential uses" under the Clean Air Act. Essential-use products are exempt from the ban by FDA on the use of CFCs and other ODS propellants in FDA-regulated products and from the ban by the Environmental Protection Agency (EPA) on the use of ODSs in pressurized dispensers. The products that will no longer constitute an essential use are: Sterile aerosol talc administered intrapleurally by thoracoscopy for human use and metered-dose atropine sulfate aerosol human drugs administered by oral inhalation...
October 26, 2016: Federal Register
https://www.readbyqxmd.com/read/27905296/a-pathogenic-role-for-the-integrin-cd103-in-experimental-allergic-airways-disease
#8
Vanessa S Fear, Siew Ping Lai, Graeme R Zosky, Kara L Perks, Shelley Gorman, Fabian Blank, Christophe von Garnier, Philip A Stumbles, Deborah H Strickland
The integrin CD103 is the αE chain of integrin αEβ7 that is important in the maintenance of intraepithelial lymphocytes and recruitment of T cells and dendritic cells (DC) to mucosal surfaces. The role of CD103 in intestinal immune homeostasis has been well described, however, its role in allergic airway inflammation is less well understood. In this study, we used an ovalbumin (OVA)-induced, CD103-knockout (KO) BALB/c mouse model of experimental allergic airways disease (EAAD) to investigate the role of CD103 in disease expression, CD4(+) T-cell activation and DC activation and function in airways and lymph nodes...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27902779/differential-cytokine-gene-expression-in-granulomas-from-lungs-and-lymph-nodes-of-cattle-experimentally-infected-with-aerosolized-mycobacterium-bovis
#9
Mitchell V Palmer, Tyler C Thacker, W Ray Waters
The hallmark lesion of tuberculosis in humans and animals is the granuloma. The granuloma represents a distinct host cellular immune response composed of epithelioid macrophages, lymphocytes, and multinucleated giant cells, often surrounding a caseous necrotic core. Within the granuloma, host-pathogen interactions determine disease outcome. Factors within the granulomas such as cytokines and chemokines drive cell recruitment, activity, function and ultimately the success or failure of the host's ability to control infection...
2016: PloS One
https://www.readbyqxmd.com/read/27901646/the-time-dependent-health-and-biochemical-effects-in-rats-exposed-to-stainless-steel-welding-dust-and-its-soluble-form
#10
Tadeusz Halatek, Magdalena Stanislawska, Irena Kaminska, Malgorzata Cieslak, Radoslaw Swiercz, Wojciech Wasowicz
Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. The principal objective of this study was to determine the dynamics of toxic effects of inhalation exposure to morphologically rated welding dust from stainless steel welding and its soluble form in TSE System with a dynamic airflow. We assessed the pulmonary toxicity of welding dust in Wistar rats exposed to 60...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27900624/the-sources-of-trace-element-pollution-of-dry-depositions-nearby-a-drinking-water-source
#11
Xinyue Guo, Hongbing Ji, Cai Li, Yang Gao, Huaijian Ding, Lei Tang, Jinguo Feng
Miyun Reservoir is one of the most important drinking water sources for Beijing. Thirteen atmospheric PM sampling sites were established around this reservoir to analyze the mineral composition, morphological characteristics, element concentration, and sources of atmospheric PM pollution, using transmission electron microscope, X-ray diffraction, and inductively coupled plasma mass spectrometry analyses. The average monthly dry deposition flux of aerosols was 15.18 g/m(2), with a range of 5.78-47.56 g/m(2)...
November 29, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27898235/postexposure-prophylaxis-after-possible-anthrax-exposure-adherence-and-adverse-events
#12
Leisha D Nolen, Rita M Traxler, Grishma A Kharod, Pallavi A Kache, Stefan Katharios-Lanwermeyer, Katherine A Hendricks, Sean V Shadomy, William A Bower, Dana Meaney-Delman, Henry T Walke
Anthrax postexposure prophylaxis (PEP) was recommended to 42 people after a laboratory incident that involved potential aerosolization of Bacillus anthracis spores in 2 laboratories at the Centers for Disease Control and Prevention in 2014. At least 31 (74%) individuals who initiated PEP did not complete either the recommended 60 days of antimicrobial therapy or the 3-dose vaccine regimen. Among the 29 that discontinued the antimicrobial component of PEP, most (38%) individuals discontinued PEP because of their low perceived risk of infection; 9 (31%) individuals discontinued prophylaxis due to PEP-related minor adverse events, and 10% cited both low risk and adverse events as their reason for discontinuation...
November 29, 2016: Health Security
https://www.readbyqxmd.com/read/27896697/metal-cationization-extractive-electrospray-ionization-mass-spectrometry-of-compounds-containing-multiple-oxygens
#13
Kenneth D Swanson, Sandra E Spencer, Gary L Glish
Extractive electrospray ionization is an ambient ionization technique that allows real-time sampling of liquid samples, including organic aerosols. Similar to electrospray ionization, the composition of the electrospray solvent used in extractive electrospray ionization can easily be altered to form metal cationized molecules during ionization simply by adding a metal salt to the electrospray solvent. An increase in sensitivity is observed for some molecules that are lithium, sodium, or silver cationized compared with the protonated molecule formed in extractive electrospray ionization with an acid additive...
November 28, 2016: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/27890714/a-randomized-trial-of-the-amikacin-fosfomycin-inhalation-system-for-the-adjunctive-therapy-of-gram-negative-ventilator-associated-pneumonia-iasis-trial
#14
Marin H Kollef, Jean-Damien Ricard, Damien Roux, Bruno Francois, Eleni Ischaki, Zsolt Rozgonyi, Thierry Boulain, Zsolt Ivanyi, Gál János, Denis Garot, Firas Koura, Epaminondas Zakynthinos, George Dimopoulos, Antonio Torres, Wayne Danker, A Bruce Montgomery
BACKGROUND: Clinical failures in ventilator-associated pneumonia (VAP) caused by Gram-negative bacteria are common and associated with substantial morbidity, mortality, and resource utilization. METHODS: We assessed the safety and efficacy of the amikacin fosfomycin inhalation system (AFIS) for the treatment of Gram-negative bacterial VAP in a randomized double-blind, placebo-controlled, parallel group, phase 2 study between May 2013 and March 2016. We compared standard of care in each arm plus 300 mg amikacin/120 mg fosfomycin or placebo (saline), delivered by aerosol twice daily for 10 days (or to extubation if <10 days) via the investigational eFlow Inline System (PARI GmbH, Germany)...
November 24, 2016: Chest
https://www.readbyqxmd.com/read/27890411/effect-of-hydrolysis-of-n2o5-on-nitrate-and-ammonium-formation-in-beijing-china-wrf-chem-model-simulation
#15
Xing Su, Xuexi Tie, Guohui Li, Junji Cao, Rujin Huang, Tian Feng, Xin Long, Ruiguang Xu
Beijing, the capital of China, is a mega city with a population of >20 million. In recent years, the city has experienced heavy air pollution, with particulate matter (PM) being one of its top pollutants. In the last decade, extensive efforts have been made to characterize the sources, properties, and processes of PM in Beijing. Despite progress made by previous studies, there are still some important questions to be answered and addressed. The focus of this research is to study the impact of the heterogeneous hydrolysis of N2O5 on the formation of nitrate (NO3(-)) and ammonium (NH4(+)) in Beijing...
November 24, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27889085/impact-of-diurnal-variability-and-meteorological-factors-on-the-pm2-5-aod-relationship-implications-for-pm2-5-remote-sensing
#16
Jianping Guo, Feng Xia, Yong Zhang, Huan Liu, Jing Li, Mengyun Lou, Jing He, Yan Yan, Fu Wang, Min Min, Panmao Zhai
PM2.5 retrieval from space is still challenging due to the elusive relationship between PM2.5 and aerosol optical depth (AOD), which is further complicated by meteorological factors. In this work, we investigated the diurnal cycle of PM2.5 in China, using ground-based PM measurements obtained at 226 sites of China Atmosphere Watch Network during the period of January 2013 to December 2015. Results showed that nearly half of the sites witnessed a PM2.5 maximum in the morning, in contrast to the least frequent occurrence (5%) in the afternoon when strong solar radiation received at the surface results in rapid vertical diffusion of aerosols and thus lower mass concentration...
November 23, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27888373/combined-toxic-effect-of-airborne-heavy-metals-on-human-lung-cell-line-a549
#17
Yeowool Choi, Kihong Park, Injeong Kim, Sang D Kim
Many studies have demonstrated that heavy metals existing as a mixture in the atmospheric environment cause adverse effects on human health and are important key factors of cytotoxicity; however, little investigation has been conducted on a toxicological study of a metal mixture from atmospheric fine particulate matter. The objective of this study was to predict the combined effects of heavy metals in aerosol by using in vitro human cells and obtain a suitable mixture toxicity model. Arsenic, nickel, and lead were selected for mixtures exposed to A549 human lung cancer cells...
November 25, 2016: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/27888326/secondary-sulfur-and-nitrogen-species-in-pm10-from-the-rijeka-bay-area-croatia
#18
Ana Alebic-Juretic, Boris Mifka
Samples of PM10 were collected over a 12 month period at two sites approximately 5 km apart. Site 1 was an urban site in the center of the city of Rijeka, Croatia, and Site 2 was an industrial site in the proximity of a shipyard, located in the southeastwards direction from the city. No significant differences in airborne concentrations of PM10 or secondary inorganic ions were found between the two sites. Therefore, the sampling continued only at Site 1. The dominant airborne compound was ammonium sulfate, being approximately six times more abundant in the summer (S) months than ammonium nitrate...
November 25, 2016: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27888144/calcifediol-loaded-liposomes-for-local-treatment-of-pulmonary-bacterial-infections
#19
Arianna Castoldi, Christian Herr, Julia Niederstraßer, Hagar Ibrahim Labouta, Ana Melero, Sarah Gordon, Nicole Schneider-Daum, Robert Bals, Claus-Michael Lehr
The influence of vitamin D3 and its metabolites calcifediol (25(OH)D) and calcitriol on immune regulation and inflammation is well described, and raises the question of potential benefit against bacterial infections. In the current study, 25(OH)D was encapsulated in liposomes to enable aerosolisation, and tested for the ability to prevent pulmonary infection by Pseudomonas aeruginosa. Prepared 25(OH)D-loaded liposomes were nanosized and monodisperse, with a negative surface charge and a 25(OH)D entrapment efficiency of approximately 23%...
November 22, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27886408/role-of-rock2-in-cd4-cells-in-allergic-airways-responses-in-mice
#20
David I Kasahara, Joel A Mathews, Fernanda M C Ninin, Allison P Wurmbrand, James K Liao, Stephanie A Shore
BACKGROUND: Rho kinases (ROCKs) contribute to allergic airways disease. ROCKs also play a role in lymphocyte proliferation and migration. OBJECTIVE: To determine the role of ROCK2 acting within CD4(+) cells in allergic airways responses. METHODS: ROCK2 haploinsufficient (ROCK2(+/-) ) and wildtype mice were sensitized with ovalbumin (OVA). ROCK2(+/-) mice then received either CD4(+) cells from ROCK2 sufficient OVA TCR transgenic (OT-II) mice or saline i...
November 25, 2016: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
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