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https://www.readbyqxmd.com/read/27889850/chemical-fractionation-and-health-risk-assessment-of-particulate-matter-bound-metals-in-pune-india
#1
Rohi Jan, Ritwika Roy, Suman Yadav, P Gursumeeran Satsangi
The present study deals with the assessment of sequential extraction of particulate matter (PM)-bound metals and the potential health risks associated with them in a growing metropolitan city (Pune) of India. The average mass concentration of both PM2.5-10 and PM2.5 exceeded the National Ambient Air Quality Standards. Significant seasonal variation in mass concentration was found for both size fractions of PM with higher values in winter season and lower in monsoon. Chemical species of the studied trace metals in PM exhibited significant differences, due to difference in sources of pollution...
November 26, 2016: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/27886976/airway-and-serum-adipokines-after-allergen-and-diesel-exposure-in-a-controlled-human-crossover-study-of-atopic-adults
#2
Marabeth M Kramer, Jeremy A Hirota, Akshay Sood, Kay Teschke, Christopher Carlsten
Adipokines are mediators released from adipose tissue. These proteins are regarded as active elements of systemic and pulmonary inflammation, whose dysregulation can alter an individual's risk of developing allergic lung diseases. Despite this knowledge, adipokine responses to inhaled stimuli are poorly understood. We sought to measure serum and lung adiponectin, leptin, and resistin in an atopic adult study population following exposure to allergen and diesel exhaust (DE). Two types of lung samples including bronchoalveolar lavage (BAL) and bronchial wash (BW), and a time course of serum samples, were collected from the 18 subjects who participated in the randomized, double-blinded controlled human study...
November 9, 2016: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/27886143/neonatal-diesel-exhaust-particulate-exposure-does-not-predispose-mice-to-adult-cardiac-hypertrophy-or-heart-failure
#3
Yonggang Liu, Chad S Weldy, Michael T Chin
Background: We have previously reported that in utero and early life exposure to diesel exhaust particulates predisposes mice to adult heart failure, and that in utero exposure alone is sufficient to confer this predisposition. This follow up study addresses whether neonatal exposure alone can also confer this predisposition. Methods: Newborn male C57BL/6 mice were exposed to diesel exhaust (DE) particulates immediately after birth until weaning at 21 days of age, whereupon they were transferred to filtered air (FA) conditions...
November 24, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27882015/are-serum-eosinophilic-cationic-protein-levels-of-toll-collectors-affected-by-diesel-exhaust-exposure
#4
Cahit Bilgin, Peri Arbak, Ozlem Yavuz, Ege Gulec Balbay, Oner Balbay, Ali Nihat Annakkaya
OBJECTIVE: There are few studies on the diesel exhaust particulates (DEP) / eosinophilic cationic protein (ECP) level relationship. This study aimed to detect ECP levels in a highly DE exposed group, named as toll collectors. METHODS: In a cross-sectional study, levels of serum ECP, rates of respiratory symptoms, mean levels of respiratory functions, smoking status, and variations in peak expiratory flow (PEF) during weekends and working days were compared for 68 toll collectors (TC) (range of age, 24-48 years) and 28 controls (range of age, 25-61 years)...
September 2016: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/27876872/experimental-investigation-into-the-oxidation-reactivity-and-nanostructure-of-particulate-matter-from-diesel-engine-fuelled-with-diesel-polyoxymethylene-dimethyl-ethers-blends
#5
Hao Yang, Xinghu Li, Yan Wang, Mingfei Mu, Xuehao Li, Guiyue Kou
This paper focuses on oxidation reactivity and nanostructural characteristics of particulate matter (PM) emitted from diesel engine fuelled with different volume proportions of diesel/polyoxymethylene dimethyl ethers (PODEn) blends (P0, P10 and P20). PM was collected using a metal filter from the exhaust manifold. The collected PM samples were characterized using thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy. The TGA results indicated that the PM produced by P20 had the highest moisture and volatility contents and the fastest oxidation rate of solid carbon followed by P10 and P0 derived PM...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27865893/sex-and-genetic-differences-in-the-effects-of-acute-diesel-exhaust-exposure-on-inflammation-and-oxidative-stress-in-mouse-brain
#6
Toby B Cole, Jacki Coburn, Khoi Dao, Pam Roqué, Yu-Chi Chang, Vrinda Kalia, Tomas R Guilarte, Jennifer Dziedzic, Lucio G Costa
In addition to increased morbidity and mortality caused by respiratory and cardiovascular diseases, air pollution may also contribute to central nervous system (CNS) diseases. Traffic-related air pollution is a major contributor to global air pollution, and diesel exhaust (DE) is its most important component. DE contains more than 40 toxic air pollutants and is a major constituent of ambient particulate matter (PM), particularly of ultrafine-PM. Limited information suggests that exposure to DE may cause oxidative stress and neuroinflammation in the CNS...
November 16, 2016: Toxicology
https://www.readbyqxmd.com/read/27833058/basophil-mediated-pro-allergic-inflammation-in-vehicle-emitted-particles-exposure
#7
Alexander M Zakharenko, Ayse Basak Engin, Valery V Chernyshev, Vladimir V Chaika, Sergey M Ugay, Ramin Rezaee, Gholamreza Karimi, Vladimir A Drozd, Anna V Nikitina, Sergey F Solomennik, Olga R Kudryavkina, Liu Xin, Yuan Wenpeng, Manolis Tzatzarakis, Aristidis M Tsatsakis, Kirill S Golokhvast
Despite of the fact that engine manufacturers develop a new technology to reduce exhaust emissions, insufficient attention given to particulate emissions. However, diesel exhaust particles are a major source of air-borne pollution, contain vast amount of polycyclic aromatic hydrocarbons (PAHs) and may have deleterious effects on the immune system, resulting in the induction and enhancement of pro-allergic processes. In the current study, vehicle emitted particles (VEP) from 2 different types of cars (diesel - D and gasoline - G) and locomotive (L) were collected...
January 2017: Environmental Research
https://www.readbyqxmd.com/read/27832168/identification-of-potential-novel-biomarkers-and-signaling-pathways-related-to-otitis-media-induced-by-diesel-exhaust-particles-using-transcriptomic-analysis-in-an-in-vivo-system
#8
Hyo Jeong Kim, So Young Kim, Jee Young Kwon, Yeo Jin Kim, Seung Hun Kang, Won-Hee Jang, Jun Ho Lee, Myung-Whan Seo, Jae-Jun Song, Young Rok Seo, Moo Kyun Park
INTRODUCTION: Air pollutants are associated with inflammatory diseases such as otitis media (OM). Significantly higher incidence rates of OM are reported in regions with air pollution. Diesel exhaust particles (DEPs) comprise a major class of contaminants among numerous air pollutants, and they are characterized by a carbonic mixture of polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs, and small amounts of sulfate, nitrate, metals and other trace elements. DEP exposure is a risk factor for inflammatory diseases...
2016: PloS One
https://www.readbyqxmd.com/read/27827897/comparative-analysis-of-toxic-responses-of-organic-extracts-from-diesel-and-selected-alternative-fuels-engine-emissions-in-human-lung-beas-2b-cells
#9
Helena Libalova, Pavel Rossner, Kristyna Vrbova, Tana Brzicova, Jitka Sikorova, Michal Vojtisek-Lom, Vit Beranek, Jiri Klema, Miroslav Ciganek, Jiri Neca, Katerina Pencikova, Miroslav Machala, Jan Topinka
This study used toxicogenomics to identify the complex biological response of human lung BEAS-2B cells treated with organic components of particulate matter in the exhaust of a diesel engine. First, we characterized particles from standard diesel (B0), biodiesel (methylesters of rapeseed oil) in its neat form (B100) and 30% by volume blend with diesel fuel (B30), and neat hydrotreated vegetable oil (NEXBTL100). The concentration of polycyclic aromatic hydrocarbons (PAHs) and their derivatives in organic extracts was the lowest for NEXBTL100 and higher for biodiesel...
November 3, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27809487/evaluation-of-exhaust-emissions-from-three-diesel-hybrid-cars-and-simulation-of-after-treatment-systems-for-ultra-low-real-world-nox-emissions
#10
Vicente Franco, Theodora Zacharopoulou, Jan Hammer, Helge Schmidt, Peter Mock, Martin Weiss, Zissis Samaras
Hybridisation offers great potential for decreasing pollutant and carbon dioxide emissions of diesel cars. However, an assessment of the real-world emissions performance of modern diesel hybrids is yet missing. Here, we test three diesel-hybrid cars on the road and benchmark our findings with two cars against tests on the chassis dynamometer and model simulations. The pollutant emissions of the two cars tested on the chassis dynamometer were in compliance with the relevant Euro standards over the NEDC and WLTP...
November 4, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27804056/smoking-status-usual-adult-occupation-and-risk-of-recurrent-urothelial-bladder-carcinoma-data-from-the-cancer-genome-atlas-tcga-project
#11
Amber N Wilcox, Debra T Silverman, Melissa C Friesen, Sarah J Locke, Daniel E Russ, Noorie Hyun, Joanne S Colt, Jonine D Figueroa, Nathaniel Rothman, Lee E Moore, Stella Koutros
PURPOSE: Tobacco smoking and occupational exposures are the leading risk factors for developing urothelial bladder carcinoma (UBC), yet little is known about the contribution of these two factors to risk of UBC recurrence. We evaluated whether smoking status and usual adult occupation are associated with time to UBC recurrence for 406 patients with muscle-invasive bladder cancer submitted to The Cancer Genome Atlas (TCGA) project. METHODS: Kaplan-Meier and Cox proportional hazard methods were used to assess the association between smoking status, employment in a high-risk occupation for bladder cancer, occupational diesel exhaust exposure, and 2010 Standard Occupational Classification group and time to UBC recurrence...
December 2016: Cancer Causes & Control: CCC
https://www.readbyqxmd.com/read/27793419/biochemical-and-physiological-effects-from-exhaust-emissions-a-review-of-the-relevant-literature
#12
REVIEW
Sergio Manzetti, Otto Andersen
Exhaust emissions are to date ranked among the most frequent causes of premature deaths worldwide. The combustion of fuels such as diesel, gasoline, and bio-blends provokes a series of pathophysiological responses in exposed subjects, which are associated with biochemical and immunological triggering. It is critical to understand these mechanisms, which are directly related to the levels of aerosol, liquid and gaseous components in fuel exhaust (e.g. nanoparticles, particulate matter, volatile compounds), so to cast attention on their toxicity and gradually minimize their use...
October 20, 2016: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/27783932/unconventional-oil-and-gas-development-and-risk-of-childhood-leukemia-assessing-the-evidence
#13
Elise G Elliott, Pauline Trinh, Xiaomei Ma, Brian P Leaderer, Mary H Ward, Nicole C Deziel
The widespread distribution of unconventional oil and gas (UO&G) wells and other facilities in the United States potentially exposes millions of people to air and water pollutants, including known or suspected carcinogens. Childhood leukemia is a particular concern because of the disease severity, vulnerable population, and short disease latency. A comprehensive review of carcinogens and leukemogens associated with UO&G development is not available and could inform future exposure monitoring studies and human health assessments...
October 23, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27782363/dna-damage-potential-of-engine-emissions-measured-in-vitro-by-micronucleus-test-in-human-bronchial-epithelial-cells
#14
Tereza Cervena, Andrea Rossnerova, Jitka Sikorova, Vit Beranek, Michal Vojtisek-Lom, Miroslav Ciganek, Jan Topinka, Pavel Rossner
Internal combustion engine emissions belong among the major anthropogenic sources of air pollution in urban areas. According to the International Agency for Research on Cancer (IARC), there is sufficient evidence of the carcinogenicity of diesel exhaust in humans. Although alternative fuels, mainly biodiesel, have recently become popular, little is still known about the genotoxicity of emissions from these fuels. We analysed DNA damage expressed as the frequency of micronuclei (MN) in human bronchial epithelial cells (BEAS-2B), induced by extractable organic matter (EOM; tested concentrations: 1, 10 and 25 μg/ml) obtained from particle emissions from various blends of biodiesel with diesel fuels (including neat diesel fuel (B0), a blend of 70% B0 and 30% biodiesel (B30) and neat biodiesel (B100))...
October 26, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27780101/characteristics-of-on-road-nox-emissions-from-euro-6-light-duty-diesel-vehicles-using-a-portable-emissions-measurement-system
#15
Sangil Kwon, Yonghee Park, Junhong Park, Jeongsoo Kim, Kwang-Ho Choi, Jun-Seok Cha
This paper presents the on-road nitrogen oxides (NOx) emissions measurements from Euro 6 light-duty diesel vehicles using a portable emissions measurement system on the predesigned test routes in the metropolitan area of Seoul, Korea. Six diesel vehicles were tested and the NOx emissions results were analyzed according to the driving routes, driving conditions, data analysis methods, and ambient temperatures. Total NOx emissions for route 1, which has higher driving severity than route 2, differed by -4-60% from those for route 2...
October 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27777373/occupational-exposures-and-chronic-obstructive-pulmonary-disease-copd-comparison-of-a-copd-specific-job-exposure-matrix-and-expert-evaluated-occupational-exposures
#16
Laura Kurth, Brent Doney, Sheila Weinmann
OBJECTIVES: To compare the occupational exposure levels assigned by our National Institute for Occupational Safety and Health chronic obstructive pulmonary disease-specific job exposure matrix (NIOSH COPD JEM) and by expert evaluation of detailed occupational information for various jobs held by members of an integrated health plan in the Northwest USA. METHODS: We analysed data from a prior study examining COPD and occupational exposures. Jobs were assigned exposure levels using 2 methods: (1) the COPD JEM and (2) expert evaluation...
October 24, 2016: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/27763780/systemic-effects-of-controlled-exposure-to-diesel-exhaust-a-meta-analysis-from-randomized-controlled-trials
#17
Jefferson Luis Vieira, Francisco Yuri Macedo, Alexandre Miguel Benjo, Guilherme V Guimarães, Johanna Paola Contreras, Edimar A Bocchi
INTRODUCTION: Ambient air pollution is associated with adverse cardiovascular events. This meta-analysis aimed to investigate the short-term association between air pollution and cardiovascular effects on healthy volunteers. METHODS: We searched databases to identify randomized trials with controlled human exposures to either of two models for studying ambient particulate matter: diesel-exhaust or concentrated ambient particles. Estimates of size effect were performed using standardized mean difference (SMD)...
October 20, 2016: Annals of Medicine
https://www.readbyqxmd.com/read/27753116/effects-of-domestic-chemical-stressors-on-expression-of-allergen-genes-in-the-european-house-dust-mite
#18
J C Vidal-Quist, F Ortego, B N Lambrecht, P Castañera, P Hernández-Crespo
The expression of allergen genes in house dust mites is influenced by temperature and relative humidity, but little is known of the impacts of other environmental factors that may alter the repertoire of allergens released by mites in home microhabitats. Bioassays were conducted in concave microscope slides in combination with real-time quantitative polymerase chain reaction (RT-qPCR) to analyse gene expression of 17 allergens of Dermatophagoides pteronyssinus (Acariformes: Pyroglyphidae) exposed to three chemical stressors that can be present in domestic environments...
October 18, 2016: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/27734664/heavy-duty-diesel-exhaust-particles-during-engine-motoring-formed-by-lube-oil-consumption
#19
Panu Karjalainen, Leonidas Ntziachristos, Timo Murtonen, Hugo Wihersaari, Pauli Simonen, Fanni Myllari, Nils-Olof Nylund, Jorma Keskinen, Topi Rönkkö
This study reports high numbers of exhaust emissions particles during engine motoring. Such particles were observed in the exhaust of two heavy duty vehicles with no diesel particle filter (DPF), driven on speed ramp tests and transient cycles. A significant fraction of these particles was non-volatile in nature. The number-weighted size distribution peak was below 10 nm when a thermodenuder was used to remove semivolatile material, growing up to 40 nm after semivolatile species condensation. These particles were found to contribute to 9-13% of total particle number emitted over a complete driving cycle...
October 13, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27730504/source-identification-of-combustion-related-air-pollution-during-an-episode-and-afterwards-in-winter-time-in-istanbul
#20
S Levent Kuzu
Conventional air pollutants (PM10, CO, NOx) gradually increased from fall to winter during 2015 in Istanbul. Several air pollution episodes were observed during this period. This study was made in order to determine polycyclic aromatic hydrocarbon (PAH) levels, identify the sources of air pollution, and make toxicity assessment based on Benzo(a)pyrene equivalent concentrations. The sampling took 14 sequential days during winter. High-pressure weather conditions prevailed at the start of the sampling. The conditions were then changed to low-pressure condition towards the end of the sampling...
October 11, 2016: Environmental Science and Pollution Research International
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