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https://www.readbyqxmd.com/read/29785256/job-titles-classified-into-socioeconomic-and-occupational-groups-identify-subjects-with-increased-risk-for-respiratory-symptoms-independent-of-occupational-exposure-to-vapour-gas-dust-or-fumes
#1
Christian Schyllert, Martin Andersson, Linnea Hedman, Magnus Ekström, Helena Backman, Anne Lindberg, Eva Rönmark
Objectives : To evaluate the ability of three different job title classification systems to identify subjects at risk for respiratory symptoms and asthma by also taking the effect of exposure to vapours, gas, dust, and fumes (VGDF) into account. Background : Respiratory symptoms and asthma may be caused by occupational factors. There are different ways to classify occupational exposure. In this study, self-reported occupational exposure to vapours, gas, dust and fumes was used as well as job titles classifed into occupational and socioeconomic Groups according to three different systems...
2018: European Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29784340/quantitative-study-of-the-mineralogical-composition-of-mineral-dust-aerosols-by-x-ray-diffraction
#2
Sophie Nowak, Sandra Lafon, Sandrine Caquineau, Emilie Journet, Benoit Laurent
Mineral dust aerosols, produced by wind erosion in arid regions and semi-arid surfaces, are important components of the atmosphere that affect the Earth radiative budget, atmospheric chemistry and biogeochemical cycles. Dust aerosol particles are composed of a complex mixture of various minerals, mainly clays, calcite, quartz, feldspars and iron oxides. The nature and the relative abundance of the minerals are key parameters to evaluate mineral dust environmental impacts. Strong limitations remain to quantify the mineralogical composition of dust particles, mainly due to the low mass of in-situ collected dust particle samples...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29784068/play-behaviour-fear-responses-and-activity-levels-in-commercial-broiler-chickens-provided-with-preferred-environmental-enrichments
#3
M Baxter, C L Bailie, N E O'Connell
There is currently a lack of research investigating the effectiveness of commercial broiler enrichments, and in particular the ability of these additions to create opportunities for positive welfare. One aim of this study was to investigate whether offering broiler chickens enrichments that have recently been found to be preferred leads to increased levels of activity. A second aim was to investigate the emotional effects of provision of these enrichments by assessing levels of fearfulness and play-like activity...
May 22, 2018: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29784045/occupational-risk-factors-for-idiopathic-pulmonary-fibrosis-in-southern-europe-a-case-control-study
#4
Giulia Paolocci, Ilenia Folletti, Kjell Torén, Magnus Ekström, Marco Dell'Omo, Giacomo Muzi, Nicola Murgia
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive fibrosing interstitial pneumonia of unknown cause associated with the histopathologic and/or radiologic pattern of usual interstitial pneumonia (UIP). Occupational risk factors have been proposed to be associated with UIP. The aim of this case-control study is to evaluate the relationship between UIP pattern and occupational exposure in Southern Europe. METHODS: Sixty nine cases with a UIP radiological pattern at CT-scan were selected from a clinical database of the University Hospital of Perugia, Umbria, between January 2010 and December 2013...
May 21, 2018: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29783866/effect-of-the-flame-retardant-tris-1-3-dichloro-2-propyl-phosphate-tdcpp-on-na-k-atpase-and-cl-transport-in-hela-cells
#5
Simona Latronico, Maria Elena Giordano, Emanuela Urso, Maria Giulia Lionetto, Trifone Schettino
Tris (1, 3-dichloro-2-propyl) phosphate (TDCPP) is one of the most diffused phosphorus flame retardants in the environment and is highly persistent and abundant in residential dust samples. To date the cellular targets and mechanisms underlying its toxic effects are not completely understood. The aim of this work was to study the effects of TDCPP on ion transport mechanisms fundamental for the cellular ionic homeostasis, such as Na+ -K+ -ATPase and Cl- transport. HeLa cells were used as experimental model. TDCPP showed a dose-dependent effect on cell viability in cells exposed for 24h as assessed by MTT test (IC50 = 52...
May 21, 2018: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/29783109/anti-inflammatory-potential-of-alginic-acid-from-sargassum-horneri-against-urban-aerosol-induced-inflammatory-responses-in-keratinocytes-and-macrophages
#6
I P Shanura Fernando, Thilina U Jayawardena, K K Asanka Sanjeewa, Lei Wang, You-Jin Jeon, Won Woo Lee
The airborne particulate pollutants originating in the deserts of Mongolia and China which becomes contaminated with industrial effluents and traffic emissions while moving with the wind currents towards East Asia has recently become a serious environmental and health issue in the region. They cause asthma, collateral lung tissue damage, oxidative stress, allergic reactions, and inflammation. The current study was undertaken to evaluate the protective effects of alginate extracted from the invasive alga Sargassum horneri (SHA) against fine dust collected from Beijing, China (Chinese fine dust; CFD)...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29780946/bilateral-acute-depigmentation-of-the-iris-in-two-siblings-simultaneously
#7
Rana Amin, Amena Nabih, Noha Khater
Purpose: To report the first simultaneous onset of bilateral acute depigmentation of the iris (BADI) in two siblings. Observations: Two sisters presented with bilateral ocular pain, redness and light sensitivity. Examination revealed bilateral circulating pigment in the anterior chamber with pigment dusting on backs of the corneas, patchy iris depigmentation and heavy pigment deposition in the angle. Both patients had recently suffered from upper respiratory tract infections...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780678/meteoric-metal-chemistry-in-the-martian-atmosphere
#8
J M C Plane, J D Carrillo-Sanchez, T P Mangan, M M J Crismani, N M Schneider, A Määttänen
Recent measurements by the Imaging Ultraviolet Spectrograph (IUVS) instrument on NASA's Mars Atmosphere and Volatile EvolutioN mission show that a persistent layer of Mg+ ions occurs around 90 km in the Martian atmosphere but that neutral Mg atoms are not detectable. These observations can be satisfactorily modeled with a global meteoric ablation rate of 0.06 t sol-1 , out of a cosmic dust input of 2.7 ± 1.6 t sol-1 . The absence of detectable Mg at 90 km requires that at least 50% of the ablating Mg atoms ionize through hyperthermal collisions with CO2 molecules...
March 2018: Journal of Geophysical Research. Planets
https://www.readbyqxmd.com/read/29780181/dust-control-by-air-blocking-shelves-and-dust-collector-to-bailing-airflow-ratios-for-a-surface-mine-drill-shroud
#9
Y Zheng, W R Reed, J D Potts, M Li, J P Rider
The National Institute for Occupational Safety and Health (NIOSH) recently developed a series of validated models utilizing computational fluid dynamics (CFD) to study the effects of air-blocking shelves on airflows and respirable dust distribution associated with medium-sized surface blasthole drill shrouds as part of a dry dust collector system. Using validated CFD models, three different air-blocking shelves were included in the present study: a 15.2-cm (6-in.)-wide shelf; a 7.6-cm (3-in.)-wide shelf; and a 7...
May 2018: Mining Engineering
https://www.readbyqxmd.com/read/29779694/the-effectiveness-of-respiratory-protection-worn-by-communities-to-protect-from-volcanic-ash-inhalation-part-i-filtration-efficiency-tests
#10
William Mueller, Claire J Horwell, Andrew Apsley, Susanne Steinle, Stephanie McPherson, John W Cherrie, Karen S Galea
During volcanic eruptions and their aftermath, communities may be concerned about the impacts of inhaling volcanic ash. Access to effective respiratory protection (RP) is therefore important for many people in volcanic areas all over the world. However, evidence to support the use of effective RP during such crises is currently lacking. The aim of this study was to build the first evidence base on the effectiveness of common materials used to protect communities from ash inhalation in volcanic crises. We obtained 17 forms of RP, covering various types of cloth through to disposable masks (typically used in occupational settings), which communities are known to wear during volcanic crises...
April 22, 2018: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29778940/pcbs-and-organochlorine-pesticides-in-indoor-environments-a-comparison-of-indoor-contamination-in-canada-and-czech-republic
#11
Ondrej Audy, Lisa Melymuk, Marta Venier, Simon Vojta, Jitka Becanova, Kevin Romanak, Martina Vykoukalova, Roman Prokes, Petr Kukucka, Miriam L Diamond, Jana Klanova
Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) are restricted compounds that are ubiquitously detected in the environment, including indoor matrices such as air and residential dust. We report concentrations of PCBs and selected OCPs in indoor air and dust from homes in Canada (23 homes) and Czech Republic (20 homes). Indoor air concentrations of PCBs and OCPs were ∼10 times higher than that outdoors. PCB concentrations of ∼450 ng/m3 were similar in both countries, higher in homes built before the restrictions on PCBs, and had congener profiles consistent with PCB mixtures manufactured or used in each country...
May 3, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778677/growth-impacts-of-saharan-dust-mineral-nutrients-and-co-2-on-a-planktonic-herbivore-in-southern-mediterranean-lakes
#12
Manuel Villar-Argaiz, Marco J Cabrerizo, Juan Manuel González-Olalla, Macarena S Valiñas, Sanja Rajic, Presentación Carrillo
Rising levels of CO2 can boost plant biomass but reduce its quality as a food source for herbivores. However, significant uncertainties remain as to the degree to which the effect is modulated by other environmental factors and the underlying processes causing these responses in nature. To address these questions, we carried out CO2 -manipulation experiments using natural seston from three lakes under nutrient-enriched conditions (mimicking eutrophication and atmospheric dust-input processes) as a food source for the planktonic Daphnia pulicaria...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29778160/food-contamination-as-a-pathway-for-lead-exposure-in-children-during-the-2010-2013-lead-poisoning-epidemic-in-zamfara-nigeria
#13
Simba Tirima, Casey Bartrem, Ian von Lindern, Margrit von Braun, Douglas Lind, Shehu Mohamed Anka, Aishat Abdullahi
In 2010, an estimated 400 to 500 children died of acute lead poisoning associated with artisanal gold mining in Zamfara, Nigeria. Processing of gold ores containing up to 10% lead within residential compounds put residents, especially children, at the highest risk. Principal routes of exposure were incidental ingestion and inhalation of contaminated soil and dusts. Several Nigerian and international health organizations collaborated to reduce lead exposures through environmental remediation and medical treatment...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29778012/reactive-oxygen-species-ros-activity-of-ambient-fine-particles-pm-2-5-measured-in-seoul-korea
#14
Jieun Park, Eun Ha Park, James J Schauer, Seung-Muk Yi, Jongbae Heo
Substantial increase in level of particulate matter has raised concerns in South Korea recently. Ambient particulate matter is classified as Group I carcinogen (IARC, 2013) and multiple epidemiological studies has demonstrated adverse health effects due to exposure of particulate matter. Fine particulate matter (PM2.5 ) which has a diameter <2.5 μm is likely to penetrate deeply into lung and is known to be eliciting adverse health effects. A number of epidemiological studies have been conducted on adverse health effects of PM-related diseases and mortality rate, yet particulate matter (PM)-induced reactive oxygen species (ROS) activity at the cellular level has not been actively studied in Korea...
May 16, 2018: Environment International
https://www.readbyqxmd.com/read/29776141/probing-a-dusty-magnetized-plasma-with-self-excited-dust-density-waves
#15
Benjamin Tadsen, Franko Greiner, Alexander Piel
A cloud of nanodust particles is created in a reactive argon-acetylene plasma. It is then transformed into a dusty magnetized argon plasma. Plasma parameters are obtained with the dust-density wave diagnostic introduced by Tadsen et al. [Phys. Plasmas 22, 113701 (2015)10.1063/1.4934927]. A change from an open to a cylindrically enclosed nanodust cloud, which was observed earlier, can now be explained by a stronger electric confinement if a vertical magnetic field is present. Using two-dimensional extinction measurements and the inverse Abel transform to determine the dust density, a redistribution of the dust with increasing magnetic induction is found...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29775923/determination-of-hydroxy-metabolites-of-cocaine-from-hair-samples-and-comparison-with-street-cocaine-samples
#16
Thomas Franz, Frank Scheufler, Klaus Stein, Michael Uhl, Torsten Dame, Gerlinde Schwarz, Hans Sachs, Gisela Skopp, Frank Musshoff
Drugs which are commonly smoked or sniffed (e.g. cocaine), can contaminate hair through smoke or dust; therefore testing for metabolites, especially hydroxy metabolites, is highly recommended. The presence of hydroxy metabolites in street-cocaine (COC) has been discussed. To check if detection of hydroxy metabolites definitely proves ingestion, the presence of these metabolites in street COC samples has to be checked. It is expected that the more hydrophilic hydroxy metabolites of COC are incorporated into the hair-matrix to a lesser extent...
April 12, 2018: Forensic Science International
https://www.readbyqxmd.com/read/29775830/characterization-of-metals-in-indoor-dusts-from-electronic-workshops-cybercaf%C3%A3-s-and-offices-in-southern-nigeria-implications-for-on-site-human-exposure
#17
Chukwujindu M A Iwegbue, Grace Obi, Onoriode O Emoyan, Eze W Odali, Francis E Egobueze, Godswill O Tesi, Godwin E Nwajei, Bice S Martincigh
The levels of Cd, Pb, Cr, Ni, Cu, Co, Ba, Mn, Zn, Al and Fe were evaluated in indoor dusts from electronic workshops, cybercafés and offices in southern Nigeria. The study was aimed at providing information on the distribution patterns, and the associated risks that may arise from exposure of humans to these metals in indoor dusts from the three work environments. The dust samples were digested with aqua-regia and analyzed for the metal concentrations by inductively coupled plasma-atomic emission spectrometry (ICP-AES)...
May 15, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29775648/towards-a-quantitative-model-to-predict-the-toxicity-pathogenicity-potential-of-mineral-fibers
#18
Alessandro F Gualtieri
A number of mineral fibers represent a health hazard because they are classified as cancer-causing chemical/physical toxicants upon (chronic) dust inhalation. Although in the last decades they have been the subject of intensive multidisciplinary investigations, the mechanisms by which mineral fibers induce toxic and pathogenic adverse effects on human health and environment are not yet fully understood. The major intricacy of the biological approach that prevents the design of a conclusive shared model of behavior of mineral fibers in a biological system stems from their very nature with intrinsic variability in chemical, molecular, structural and morphometric parameters, biodurability and surface reactivity...
May 15, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29775026/-clinical-study-on-serum-25-oh-d-level-in-patients-with-moderate-to-severe-allergic-rhinitis
#19
J Y Tan, T Liu, L X Zhang
Objective: Through the detection of the serum 25 (OH) D level of patients with moderate to severe allergic rhinitis (AR), we preliminarily explored the mechanism of vitamin D on AR and provided evidence for the control of AR. Method: Eighty cases of moderate to severe AR and 65 healthy adults were selected as the subjects. The level of 25 (OH) D was detected by enzyme-linked immunosorbent assay (ELISA), and the serum 25 (OH) D level of eight common serum allergens in patients with moderate to severe AR was analyzed...
February 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29773705/vapour-gas-dust-and-fume-occupational-exposures-in-male-patients-with-rheumatoid-arthritis-resident-in-cornwall-uk-and-their-association-with-rheumatoid-factor-and-anti-cyclic-protein-antibodies-a-retrospective-clinical-study
#20
Dan Murphy, Katy Bellis, David Hutchinson
OBJECTIVES: To quantify exposure to vapour, gas, dust and fumes (VGDF) and smoking in male rheumatoid arthritis (RA) and investigate impact on rheumatoid factor (RF) and anti-citrullinated protein antibody (ACPA) levels. DESIGN: A retrospective observational study. SETTING: The Royal Cornwall Hospital Trust, UK. A single university hospital setting. PARTICIPANTS: 726 men followed up between February 2015 and August 2016, fulfilling RA diagnostic criteria...
May 17, 2018: BMJ Open
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