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https://www.readbyqxmd.com/read/28102779/long-term-dust-aerosol-production-from-natural-sources-in-iceland
#1
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/28102066/erratum-in-vitro-evaluation-of-allergen-potencies-of-commercial-house-dust-mite-sublingual-immunotherapy-reagents
#2
Kyung Hee Park, Mina Son, Soo Young Choi, Hey Jung Park, Jae Hyun Lee, Kyoung Yong Jeong, Joo Shil Lee, Jung Won Park
This corrects the article on p. 124 in vol. 7, PMID: 25729619.
March 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28102060/usefulness-of-house-dust-mite-nasal-provocation-test-in-asthma
#3
Inseon S Choi, Soo Jeong Kim, Joo Min Won, Myeong Soo Park
PURPOSE: We previously reported that the skin prick test was sensitive and the serum specific immunoglobulin E test was specific for predicting positive airway responses to house dust mites (HDMs) in patients with asthma. Because the nose and bronchus are one airway, the nasal provocation test would be more specific for predicting the bronchial responses to HDM than the skin test. METHODS: The allergy skin prick test and nasal and bronchial provocation tests using HDM (Dermatophagoides farinae) were performed in 41 young men (age, 19-28 years) who wanted military certification for asthma...
March 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28100300/molecular-analysis-and-species-diversity-of-nocardia-in-hospital-environment-of-a-developing-country-a-potential-health-hazard
#4
Hossein Ali Rahdar, Davood Azadi, Hasan Shojaei, Abbas Daei Naser
BACKGROUND: Despite hundreds of reports on the isolation of Nocardia from clinical samples, the presence and diversity of Nocardia species capable of survival in a harsh and adverse condition such as hospital environment have not been comprehensively studied. The aim of this study was to assess the Nocardia species diversity in the hospital environment to provide a better insight on their potential threat as a reservoir for the development of nosocomial infections. MATERIALS AND METHODS: A total of 90 hospital water, dust and soil samples collected from 30 hospitals were analyzed for the presence of Nocardia using standard protocols for isolation and characterization of the isolates...
January 17, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28099453/elimination-of-porcine-epidemic-diarrhea-virus-in-an-animal-feed-manufacturing-facility
#5
Anne R Huss, Loni L Schumacher, Roger A Cochrane, Elizabeth Poulsen, Jianfa Bai, Jason C Woodworth, Steve S Dritz, Charles R Stark, Cassandra K Jones
Porcine Epidemic Diarrhea Virus (PEDV) was the first virus of wide scale concern to be linked to possible transmission by livestock feed or ingredients. Measures to exclude pathogens, prevent cross-contamination, and actively reduce the pathogenic load of feed and ingredients are being developed. However, research thus far has focused on the role of chemicals or thermal treatment to reduce the RNA in the actual feedstuffs, and has not addressed potential residual contamination within the manufacturing facility that may lead to continuous contamination of finished feeds...
2017: PloS One
https://www.readbyqxmd.com/read/28098501/prevalence-of-house-dust-mite-allergens-in-low-income-homes-with-evaporative-coolers-in-a-semi-arid-climate
#6
James D Johnston, Taylor Barney, Justin Crandall, Marinn Brown, Tarah Westover, Sterling Paulson, Madeleine Smith, K Scott Weber
House dust mites are typically absent in homes in arid and semi-arid climates due to low humidity. Evaporative "swamp" cooling significantly increases indoor humidity in dry climates, and is suspected of promoting dust mite survival in these regions. We investigated the prevalence and concentration of mite allergens in dust from low-income homes (n = 22) with evaporative coolers in Utah County, Utah. Overall, 15 (68.2%) homes were positive for either Der p 1 or Der f 1 in at least one location. Geometric mean allergen levels in mattresses were 0...
January 18, 2017: Archives of Environmental & Occupational Health
https://www.readbyqxmd.com/read/28095128/safety-and-benefits-of-inhaled-hypertonic-saline-following-airway-challenges-with-endotoxin-and-allergen-in-asthmatics
#7
Neil E Alexis, William D Bennett, David B Peden
OBJECTIVE: To determine whether induced sputum (IS) with hypertonic saline inhalation is safe to use in asthmatics within 24 hours of two commonly used airway challenges, namely endotoxin and dust mite allergen, and to assess whether IS can enhance mucociliary clearance (MCC) rates in asthmatics. METHODS: IS (three 7 minute inhalation periods of 3, 4, 5% hypertonic saline) was employed before (N = 29) and within 24 hours of inhaled challenges with endotoxin (N = 13) and dust mite allergen (N = 12) in a cohort of mild to moderate asthmatics...
January 17, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28094902/characteristics-of-dust-particles-abraded-from-pesticide-treated-seeds-2-density-porosity-and-chemical-content
#8
Dieter Foque, Wouter Devarrewaere, Pieter Verboven, David Nuyttens
BACKGROUND: Apart from particle size, drift of abraded seed particles during sowing is mainly affected by two other physical properties viz. particle shape and envelope density. The impact of these abraded seed particles on the environment is highly dependable on their active ingredient content. In this study, the envelope density and chemical content of dust abraded from seeds was determined as a function of particle size for six seed species. RESULTS: Envelope density and active ingredient content both change as a of function of particle size...
January 17, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28094901/characteristics-of-dust-particles-abraded-from-pesticide-treated-seeds-1-size-distribution-using-different-measuring-techniques
#9
Dieter Foque, Ingrid Zwertvaegher, Wouter Devarrewaere, Pieter Verboven, David Nuyttens
BACKGROUND: Particle size is one of the most important properties affecting the driftability and behavior of dust particles abraded from pesticide dressed seeds during sowing. Three particle sizing techniques were used determine the particle size distribution of dust abraded from seeds from six different species. RESULTS: Important differences in dust particle size distribution between species were observed with the finest dust for rapeseed and the coarsest dust for barley...
January 17, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28094899/identification-of-glyphosate-resistance-in-salsola-tragus-in-northeastern-oregon
#10
Judit Barroso, Jennifer A Gourlie, Larry K Lutcher, Mingyang Liu, Carol A Mallory-Smith
BACKGROUND: Farmers in the low-rainfall region of eastern Oregon rely on repeated applications of non-selective herbicides, predominately glyphosate, to control Salsola tragus in no-till fallow systems. Reports of poor glyphosate effectiveness have increased in recent years. Reduced efficacy is often attributed to dust, water stress, or generally poor growing conditions during application. Inadequate control also may be the result of the evolution of glyphosate resistance. Therefore, studies were undertaken to determine if glyphosate-resistant S...
January 17, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28093718/ribosomal-protein-s3-gene-silencing-protects-against-experimental-allergic-asthma
#11
Jinrui Dong, Wupeng Liao, Hong Yong Peh, Tze Khee Chan, W S Daniel Tan, Li Li, Amy Yong, W S Fred Wong
BACKGROUND AND PURPOSE: Ribosomal protein S3 (RPS3) is a 40S ribosomal protein of the S3P family essential for executing protein translation. RPS3 has recently been found to interact with the p65 subunit of the NF-κB complex, and promote p65 DNA-binding activity. Persistent activation of the NF-κB pathway is evident in allergic asthma. We hypothesized that gene silencing of lung RPS3 can ameliorate allergic airway inflammation. EXPERIMENTAL APPROACH: Gene silencing efficacy of RPS3 siRNA was screened in three different mouse cell lines by real-time PCR and immunoblotting...
January 17, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28092237/-diagnostic-assessment-of-neumonitis-due-to-cement-dust-exposition
#12
José Luis Sandoval-Gutiérrez, Selene Guerrero-Zúñiga
No abstract text is available yet for this article.
January 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28091681/microbial-rrna-sequencing-analysis-of-evaporative-cooler-indoor-environments-located-in-the-great-basin-desert-region-of-the-united-states
#13
Angela R Lemons, Mary Beth Hogan, Ruth A Gault, Kathleen Holland, Edward Sobek, Kimberly A Olsen-Wilson, Yeonmi Park, Ju-Hyeong Park, Ja Kook Gu, Michael L Kashon, Brett J Green
Recent studies conducted in the Great Basin Desert region of the United States have shown that skin test reactivity to fungal and dust mite allergens are increased in children with asthma or allergy living in homes with evaporative coolers (EC). The objective of this study was to determine if the increased humidity previously reported in EC homes leads to varying microbial populations compared to homes with air conditioners (AC). Children with physician-diagnosed allergic rhinitis living in EC or AC environments were recruited into the study...
January 16, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28089885/variable-pulse-duration-from-a-new-ho-yag-laser-the-effect-on-stone-comminution-fiber-tip-degradation-and-retropulsion-in-a-dusting-model
#14
Daniel A Wollin, Anika Ackerman, Chen Yang, Tony Chen, Walter Neal Simmons, Glenn M Preminger, Michael E Lipkin
OBJECTIVE: To more clearly define the efficiency and potential benefits of variable pulse-width laser technology for ureteroscopic lithotripsy, we performed comparative in vitro evaluations assessing stone comminution, laser fiber tip degradation, and stone retropulsion. METHODS: All experiments were conducted using a Swiss LaserClast Ho: YAG laser (Electro Medical Systems, Nyon, Switzerland) with adjustable pulse duration (300 µs - 1500 µs). To assess comminution efficiency and fiber tip degradation, a "dusting" model was employed; the laser fiber tip was moved by a 3-dimensional positioning system in a spiral motion across a flat BegoStone surface submerged in water...
January 13, 2017: Urology
https://www.readbyqxmd.com/read/28089873/patterns-of-immune-development-in-urban-preschoolers-with-recurrent-wheeze-and-or-atopy
#15
James E Gern, Agustin Calatroni, Katy F Jaffee, Henry Lynn, Amy Dresen, William W Cruikshank, Howard M Lederman, Hugh A Sampson, Wayne Shreffler, Leonard B Bacharier, Peter J Gergen, Diane R Gold, Meyer Kattan, George T O'Connor, Megan T Sandel, Robert A Wood, Gordon R Bloomberg
BACKGROUND: Disadvantaged urban children have high rates of allergic diseases and wheezing, which are diseases associated with Type 2-biased immunity. OBJECTIVE: To determine whether environmental exposures in early life influence cytokine responses which affect the development of recurrent wheezing illnesses and allergic sensitization. METHODS: A birth cohort of 560 urban families was recruited from neighborhoods with high rates of poverty, and 467 (83%) children were followed until 3 years of age...
January 13, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28089534/in-situ-measurements-of-light-absorbing-impurities-in-snow-of-glacier-on-mt-yulong-and-implications-for-radiative-forcing-estimates
#16
Hewen Niu, Shichang Kang, Xiaofei Shi, Rukumesh Paudyal, Yuanqing He, Gang Li, Shijin Wang, Tao Pu, Xiaoyi Shi
The Tibetan Plateau (TP) or the third polar cryosphere borders geographical hotspots for discharges of black carbon (BC). BC and dust play important roles in climate system and Earth's energy budget, particularly after they are deposited on snow and glacial surfaces. BC and dust are two kinds of main light-absorbing impurities (LAIs) in snow and glaciers. Estimating concentrations and distribution of LAIs in snow and glacier ice in the TP is of great interest because this region is a global hotspot in geophysical research...
January 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28089210/pm10-and-pm2-5-chemical-source-profiles-with-optical-attenuation-and-health-risk-indicators-of-paved-and-unpaved-road-dust-in-bhopal-india
#17
Shilpi Samiksha, Ramya Sunder Raman, Jayant Nirmalkar, Samresh Kumar, Rohit Sirvaiya
Size classified (PM10 and PM2.5) paved and unpaved road dust chemical source profiles, optical attenuation and potential health risk from exposure to these sources are reported in this study. A total of 45 samples from 9 paved road and 6 unpaved road sites located in and around Bhopal were re-suspended in the laboratory, collected onto filter substrates and subjected to a variety of chemical analyses. In general, road dust was enriched (compared to upper continental crustal abundance) in anthropogenic pollutants including Sb, Cu, Zn, Co, and Pb...
January 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28088626/characterization-and-source-apportionment-of-pm2-5-based-on-error-estimation-from-epa-pmf-5-0-model-at-a-medium-city-in-china
#18
Baoshuang Liu, Jianhui Wu, Jiaying Zhang, Lu Wang, Jiamei Yang, Danni Liang, Qili Dai, Xiaohui Bi, Yinchang Feng, Yufen Zhang, Qinxun Zhang
Heze city, a medium-size city in Shandong province, Eastern China. Ambient PM2.5 samples were collected in urban area of Heze from August 2015 to April 2016, and chemical species and sources of PM2.5 were investigated in this paper. The results indicated that the average concentration of PM2.5 was 100.9 μg/m(3) during the sampling period, and the water-soluble ions, carbonaceous species included elemental carbon (EC) and organic carbon (OC), as well as elements contributed 32.7-51.7%, 16.3% and 12.5%, respectively, to PM2...
January 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28079647/using-public-health-data-for-soil-pb-hazard-management-in-ohio
#19
John F Obrycki, Tyler Serafini, Darryl B Hood, Chris Alexander, Pam Blais, Nicholas T Basta
OBJECTIVES: To evaluate how frequently elevated soil lead (Pb) hazards (≥400 ppm Pb) were identified in existing blood Pb site investigations in Ohio. DESIGN: This study evaluated 3050 site investigations from the Ohio Department of Health for children with blood Pb levels at or above 10 μg dL that contained bare soil Pb data. SETTING: Data were collected from existing databases maintained by the Ohio Department of Health. PARTICIPANTS: All data were de-identified prior to analysis...
January 11, 2017: Journal of Public Health Management and Practice: JPHMP
https://www.readbyqxmd.com/read/28079148/modulation-of-snow-reflectance-and-snowmelt-from-central-asian-glaciers-by-anthropogenic-black-carbon
#20
Julia Schmale, Mark Flanner, Shichang Kang, Michael Sprenger, Qianggong Zhang, Junming Guo, Yang Li, Margit Schwikowski, Daniel Farinotti
Deposited mineral dust and black carbon are known to reduce the albedo of snow and enhance melt. Here we estimate the contribution of anthropogenic black carbon (BC) to snowmelt in glacier accumulation zones of Central Asia based on in-situ measurements and modelling. Source apportionment suggests that more than 94% of the BC is emitted from mostly regional anthropogenic sources while the remaining contribution comes from natural biomass burning. Even though the annual deposition flux of mineral dust can be up to 20 times higher than that of BC, we find that anthropogenic BC causes the majority (60% on average) of snow darkening...
January 12, 2017: Scientific Reports
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