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https://www.readbyqxmd.com/read/28231551/acute-effect-of-ozone-exposure-on-daily-mortality-in-seven-cities-of-jiangsu-province-china-no-clear-evidence-for-threshold
#1
Kai Chen, Lian Zhou, Xiaodong Chen, Jun Bi, Patrick L Kinney
BACKGROUND: Few multicity studies have addressed the health effects of ozone in China due to the scarcity of ozone monitoring data. A critical scientific and policy-relevant question is whether a threshold exists in the ozone-mortality relationship. METHODS: Using a generalized additive model and a univariate random-effects meta-analysis, this research evaluated the relationship between short-term ozone exposure and daily total mortality in seven cities of Jiangsu Province, China during 2013-2014...
February 20, 2017: Environmental Research
https://www.readbyqxmd.com/read/28231259/impact-of-seasonality-and-air-pollutants-on-carotid-femoral-pulse-wave-velocity-and-wave-reflection-in-hypertensive-patients
#2
Marina Di Pilla, Rosa Maria Bruno, Francesco Stea, Luciano Massetti, Stefano Taddei, Lorenzo Ghiadoni, Pietro Amedeo Modesti
OBJECTIVE: The effects of seasonality on blood pressure (BP) and cardiovascular (CV) events are well established, while the influence of seasonality and other environmental factors on arterial stiffness and wave reflection has never been analyzed. This study evaluated whether seasonality (daily number of hours of light) and acute variations in outdoor temperature and air pollutants may affect carotid-femoral pulse wave velocity (PWV) and pressure augmentation. DESIGN AND METHOD: 731 hypertensive patients (30-88 years, 417 treated) were enrolled in a cross-sectional study during a 5-year period...
2017: PloS One
https://www.readbyqxmd.com/read/28231065/exposure-of-children-to-phthalates-and-the-impact-of-consumer-practices-in-slovakia
#3
Miroslava Šidlovská, Ida Petrovičová, Branislav Kolena, Tomáš Pilka, Eva Šovčíková, Tomáš Trnovec
Phthalates are environmental pollutants that can enter the human body by ingestion, inhalation and dermal absorption. Food constitutes the most important source of human exposure to these chemicals. The aim of our study was the biological monitoring of exposure to eight phthalate metabolites in children (n=107), 10-12 years of age, living in eastern Slovakia. Additionally, we analysed some associations between anthropometric measures, questionnaire data (i.e. eating and drinking habits, practice of personal care products) and concentrations of phthalate metabolites...
February 23, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28230812/urban-pollutant-transport-and-infiltration-into-buildings-using-perfluorocarbon-tracers
#4
James C Matthews, Asan Bacak, M Anwar H Khan, Matthew D Wright, Michael Priestley, Damien Martin, Carl J Percival, Dudley E Shallcross
People spend the majority of their time indoors and therefore the quality of indoor air is worthy of investigation; indoor air quality is affected by indoor sources of pollutants and from pollutants entering buildings from outdoors. In this study, unique perfluorocarbon tracers were released in five experiments at a 100 m and ~2 km distance from a large university building in Manchester, UK and tracer was also released inside the building to measure the amount of outdoor material penetrating into buildings and the flow of material within the building itself...
February 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28230752/impact-of-particulate-matter-exposure-and-surrounding-greenness-on-chronic-absenteeism-in-massachusetts-public-schools
#5
Piers MacNaughton, Erika Eitland, Itai Kloog, Joel Schwartz, Joseph Allen
Chronic absenteeism is associated with poorer academic performance and higher attrition in kindergarten to 12th grade (K-12) schools. In prior research, students who were chronically absent generally had fewer employment opportunities and worse health after graduation. We examined the impact that environmental factors surrounding schools have on chronic absenteeism. We estimated the greenness (Normalized Difference Vegetation Index (NDVI)) and fine particulate matter air pollution (PM2.5) within 250 m and 1000 m respectively of each public school in Massachusetts during the 2012-2013 academic year using satellite-based data...
20, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28228079/lipid-based-nanoparticles-as-carriers-for-dermal-delivery-of-antioxidants
#6
Lucia Montenegro
The skin, being the outermost layer of our body, is constantly exposed to oxidative stress induced by UV-radiation, pollutants, smoke and xenobiotics. To counteract the deleterious effects of such exposure, the skin is equipped with a complex anti-oxidation system, involving both exogenous and endogenous antioxidants. As low molecular weight antioxidants undergo depletion in counteracting oxidative stress occurring in the skin, topical supplementation with these agents is regarded as a suitable strategy to restore skin oxidative balance...
February 22, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28226256/endocrine-and-cellular-stress-effects-of-zinc-oxide-nanoparticles-and-nifedipine-in-marsh-frogs-pelophylax-ridibundus
#7
Halina Falfushynska, Lesya Gnatyshyna, Oksana Horyn, Inna Sokolova, Oksana Stoliar
Freshwater organisms including amphibians experience increasing exposures to emerging pollutants such as nanoparticles and pharmaceuticals, which can affect their fitness and performance. We studied the effects of two common pollutants extensively used in industry, pharmaceutical and personal care products, nano-zinc oxide (nZnO) and a Ca-channel blocker nifedipine (Nfd), on endocrine status and cellular stress markers of the marsh frog Pelophylax ridibundus. Males were exposed for 14days to nZnO (3.1μM), Zn(2+) (3...
February 8, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28226212/h2s-modified-fe-ti-spinel-a-recyclable-magnetic-sorbent-for-recovering-gaseous-elemental-mercury-from-the-flue-gas-as-a-co-benefit-of-the-wet-electrostatic-precipitators
#8
Sijie Zou, Yong Liao, Shangchao Xiong, Nan Huang, Yang Geng, Shijian Yang
The non-recyclability of the sorbents used to capture Hg0 from the flue gas causes a high operation cost and the potential risk of exposure to Hg. The installment of wet electrostatic precipitators (WESPs) in coal-fired plants makes the recovery of spent sorbents for recycling and the centralized control of Hg pollution possible. In this work, H2S-modified Fe-Ti spinel was developed as a recyclable magnetic sorbent to recover Hg0 from the flue gas as a co-benefit of the WESP. Although Fe-Ti spinel exhibited poor Hg0 capture activity in the temperature range of the flue gas downstream of the flue gas desulfurization (FGD), H2S-modified Fe-Ti spinel exhibited excellent Hg0 capture performance with an average adsorption rate of 1...
February 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28225911/clean-air-matters-an-overview-of-traffic-related-air-pollution-and-pregnancy
#9
Anne Dorothée Slovic, Carmen Simone Diniz, Helena Ribeiro
The right to a healthy pregnancy and to giving birth in a safe environment is source of comprehensive research. Decent birth facilities, respect, and no discrimination are already recognized as fundamental rights, but an accurate look at the outdoor environment is required. Air pollution is a dangerous factor to pregnant women and newborns, many of whom highly exposed to traffic-related atmospheric pollutants in urban areas. Such exposure can lead to low birth weight and long-lasting effects, such as respiratory diseases and premature death...
February 16, 2017: Revista de Saúde Pública
https://www.readbyqxmd.com/read/28224658/predictive-meta-regressions-relating-mercury-tissue-concentrations-of-freshwater-piscivorous-mammals
#10
Kristin M Eccles, Philippe J Thomas, Hing Man Chan
Mercury (Hg) is a pollutant of global concern. Sentinel species, such as river otter (Lontra canadensis) and mink (Neovison vison), are often used to monitor environmental concentrations in freshwater ecosystems. Tissue total Hg (THg) concentrations are frequently used as biomarkers of exposure. However, there is no comprehensive model relating Hg tissue concentrations in different tissues, making inter-study comparisons challenging. Our objective was to establish conversion factors relating fur, brain, liver, kidney, and muscle THg concentrations using mean concentrations and standard errors reported in the literature...
February 22, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28223923/embryonic-and-postnatal-expression-of-aryl-hydrocarbon-receptor-mrna-in-mouse-brain
#11
Eiki Kimura, Chiharu Tohyama
Aryl hydrocarbon receptor (AhR), a member of the basic helix-loop-helix-Per-Arnt-Sim transcription factor family, plays a critical role in the developing nervous system of invertebrates and vertebrates. Dioxin, a ubiquitous environmental pollutant, avidly binds to this receptor, and maternal exposure to dioxin has been shown to impair higher brain functions and dendritic morphogenesis, possibly via an AhR-dependent mechanism. However, there is little information on AhR expression in the developing mammalian brain...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28223692/human-peripheral-blood-mononuclear-cells-pbmcs-from-smokers-release-higher-levels-of-il-1-like-cytokines-after-exposure-to-combustion-generated-ultrafine-particles
#12
Gianluigi De Falco, Michela Terlizzi, Mariano Sirignano, Mario Commodo, Andrea D'Anna, Rita P Aquino, Aldo Pinto, Rosalinda Sorrentino
Ultrafine particles (UFP) generated by combustion processes are often associated with adverse health effects. However, little is known about the inflammatory processes generated by UFP that may underlie their toxicological activity. Murine macrophages (J774.1 cells) and human peripheral blood mononuclear cells (PBMCs) were used to evaluate the molecular mechanism underlying the pro-inflammatory activity of UFP. The addition of soot particles to J774.1 cells induced a concentration-dependent release of IL-1α, IL-1β and IL-33 This effect was not associated with cell death and, in contrast to literature, was pronounced at very low concentrations (5-100 pg/ml)...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28222982/ecotoxicological-assessment-of-cobalt-using-hydra-model-ros-oxidative-stress-dna-damage-cell-cycle-arrest-and-apoptosis-as-mechanisms-of-toxicity
#13
Mohammed Zeeshan, Anbazhagan Murugadas, Surendra Ghaskadbi, Babu Rajendran Ramaswamy, Mohammad Abdulkader Akbarsha
The mechanisms underlying cobalt toxicity in aquatic species in general and cnidarians in particular remain poorly understood. Herein we investigated cobalt toxicity in a Hydra model from morphological, histological, developmental, and molecular biological perspectives. Hydra, exposed to cobalt (0-60 mg/L), were altered in morphology, histology, and regeneration. Exposure to standardized sublethal doses of cobalt impaired feeding by affecting nematocytes, which in turn affected reproduction. At the cellular level, excessive ROS generation, as the principal mechanism of action, primarily occurred in the lysosomes, which was accompanied by the upregulation of expression of the antioxidant genes SOD, GST, GPx, and G6PD...
February 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28222979/from-macro-to-microplastics-analysis-of-eu-regulation-along-the-life-cycle-of-plastic-bags
#14
REVIEW
Ida M Steensgaard, Kristian Syberg, Sinja Rist, Nanna B Hartmann, Alessio Boldrin, Steffen Foss Hansen
Plastic pollution and its environmental effects has received global attention the recent years. However, limited attention has so far been directed towards how plastics are regulated in a life cycle perspective and how regulatory gaps can be addressed in order to limit and prevent environmental exposure and hazards of macro- and microplastics. In this paper, we map European regulation taking outset in the life cycle perspective of plastic carrier bags: from plastic bag production to when it enters the environment...
February 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28222743/estimating-deaths-attributable-to-airborne-particles-sensitivity-of-the-results-to-different-exposure-assessment-approaches
#15
Simone Giannini, Michela Baccini, Giorgia Randi, Giovanni Bonafè, Paolo Lauriola, Andrea Ranzi
BACKGROUND: Epidemiological evidences support the existence of an effect of airborne particulate on population health. However, few studies evaluated the robustness of the results to different exposure assessment approaches. In this paper, we estimated short term effects and impacts of high levels of particulate matter with aerodynamic diameter ≤10 μm (PM10) and ≤2.5 μm (PM2.5) in the Emilia-Romagna region (Northern Italy), one of the most polluted areas in Europe, in the period 2006-2010, and checked if the results changed when different exposure definitions were used...
February 22, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28222232/dietary-total-antioxidant-capacity-in-early-school-age-and-subsequent-allergic-disease
#16
Anna Gref, Susanne Rautiainen, Olena Gruzieva, Niclas Håkansson, Inger Kull, Göran Pershagen, Magnus Wickman, Alicja Wolk, Erik Melén, Anna Bergström
BACKGROUND: Dietary antioxidant intake has been hypothesized to influence the development of allergic diseases, however, few prospective studies have investigated this association. OBJECTIVE: Our aim was to study the association between total antioxidant capacity (TAC) of the diet at age 8 years and the subsequent development of asthma, rhinitis and sensitization to inhalant allergens between 8 and 16 years, and to assess potential effect modification by known risk factors...
February 21, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28220909/effects-of-meso-2-3-dimercaptosuccinic-acid-potassium-iodide-and-chlorophyll-on-lead-accumulation-in-male-mice
#17
Ying Xie, Guifeng Zhou
OBJECTIVES: Lead (Pb) pollution is a serious public health problem all over the world, it especially plays severe damage role in children's health. Apart from reducing lead-induced damages, the decrease of lead accumulation is also critical. This study has been the first attempt to investigate effects of meso-2,3-dimercaptosuccinic acid (DMSA), potassium iodide (KI) and chlorophyll (Chl) on lead accumulation in male mice. MATERIAL AND METHODS: Eighty healthy Kunming male mice were selected and divided randomly into 8 groups...
February 21, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/28219424/health-risk-assessment-of-china-s-main-air-pollutants
#18
Jian Sun, Tiancai Zhou
BACKGROUND: With the rapid development of China's economy, air pollution has attracted public concern because of its harmful effects on health. METHODS: The source apportioning of air pollution, the spatial distribution characteristics, and the relationship between atmospheric contamination, and the risk of exposure were explored. The in situ daily concentrations of the principal air pollutants (PM2.5, PM10, SO2, NO2, CO and O3) were obtained from 188 main cities with many continuous air-monitoring stations across China (2014 and 2015)...
February 20, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28218450/chromium-iv-exposure-via-src-ras-signaling-promotes-cell-transformation
#19
Suthakar Ganapathy, Ping Li, Jean Lafontant, Rui Xiong, Tianqi Yu, Guojun Zhang, Changyan Chen
Hexavalent chromium [Cr(VI)] is a well-known environment carcinogen. The exposure of Cr(VI) through contaminated soil, air particles and drinking water is a strong concern for the public health worldwide. While many studies have been done, it remains unclear which intracellular molecules transduce Cr(VI)-mediated carcinogenic signaling in cells to promote cancer. In this study, we demonstrated that upon Cr(VI) treatment, the intracellular receptor src was activated, which further upregulated Ras activity, leading to the augmentation of ROS and onset of ER stress in human lung epithelial BEAS-2B or keratinocytes...
February 20, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28217711/source-attribution-of-poly-and-perfluoroalkyl-substances-pfass-in-surface-waters-from-rhode-island-and-the-new-york-metropolitan-area
#20
Xianming Zhang, Rainer Lohmann, Clifton Dassuncao, Xindi C Hu, Andrea K Weber, Chad D Vecitis, Elsie M Sunderland
Exposure to poly and perfluoroalkyl substances (PFASs) has been associated with adverse health effects in humans and wildlife. Understanding pollution sources is essential for environmental regulation but source attribution for PFASs has been confounded by limited information on industrial releases and rapid changes in chemical production. Here we use principal component analysis (PCA), hierarchical clustering, and geospatial analysis to understand source contributions to 14 PFASs measured across 37 sites in the Northeastern United States in 2014...
September 13, 2016: Environmental Science & Technology Letters
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