keyword
MENU ▼
Read by QxMD icon Read
search

O3

keyword
https://www.readbyqxmd.com/read/29150881/genotoxicity-of-11-heavy-metals-detected-as-food-contaminants-in-two-human-cell-lines
#1
B Kopp, D Zalko, M Audebert
Heavy metals, such as arsenic (As), antimony (Sb), barium (Ba), cadmium (Cd), cobalt (Co), germanium (Ge), lead (Pb), nickel (Ni), tellurium (Te), and vanadium (V) are widely distributed in the environment and in the food chain. Human exposure to heavy metals through water and food has been reported by different international agencies. Although some of these heavy metals are essential elements for human growth and development, they may also be toxic at low concentrations due to indirect mechanisms. In this study, the genotoxic and cytotoxic properties of 15 different oxidation statuses of 11 different heavy metals were investigated using high-throughput screening (γH2AX assay) in two human cell lines (HepG2 and LS-174T) representative of target organs (liver and colon) for food contaminants...
November 18, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/29149802/associations-of-short-term-exposure-to-ambient-air-pollutants-with-emergency-ambulance-calls-for-the-exacerbation-of-essential-arterial-hypertension
#2
Jone Vencloviene, Agne Braziene, Audrius Dedele, Kristina Lopatiene, Paulius Dobozinskas
We investigated the association between daily emergency ambulance calls (EAC) for elevated blood pressure that occurred during the time intervals of 8:00-13:59, 14:00-21:59, and 22:00-7:59, and exposure to CO, PM10, and ozone. We used Poisson regression to explore the association between the risk of EAC and short-term variation of pollutants, adjusting for seasonality and weather variables. Before noon, the risk was associated with an interquartile range (IQR) (7.9 μg/m(3)) increase in PM10 at lag 2-4 days below the median (RR = 1...
November 17, 2017: International Journal of Environmental Health Research
https://www.readbyqxmd.com/read/29148928/spatiotemporal-variations-and-relationship-of-pm-and-gaseous-pollutants-based-on-gray-correlation-analysis
#3
Yong Y Zhang, Ying Jia, Ming Li, Li A Hou
The present work characterizes the spatiotemporal variations of air pollution at four sites in Xi'an city. The investigations lasted for 1 year: January 1 through December 31, 2015. The concentrations of CO, NO2, O3, PM and SO2 were systematically monitored. The gray correlation analysis was used to correlate PM2.5 and gaseous pollutants. The formation mechanisms of sulfate and nitrate aerosols were discussed. Results clearly revealed severe air pollution by PM2.5, PM10 and NO2 at all four sites. Significant monthly variations were observed for PM2...
November 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29147121/ambient-air-pollution-and-daily-hospital-admissions-for-cardiovascular-diseases-in-arak-iran
#4
Mostafa Vahedian, Narges Khanjani, Moghaddameh Mirzaee, Ali Koolivand
BACKGROUND: Outdoor air pollution has been considered as one of the most serious health concerns over the last decade. This study aimed to investigate the association between ambient air pollution and cardiovascular hospital admissions. METHODS: This investigation was carried out from January 1, 2010 to December 31, 2015, in the urban population of Arak, Iran. Daily records of concentrations of air pollutants including particulate matter less than 10 µm (PM10), nitrogen dioxide (NO2), particulate matter less than 2...
May 2017: ARYA Atherosclerosis
https://www.readbyqxmd.com/read/29146362/ozone-treatment-for-pesticide-removal-from-carrots-optimization-by-response-surface-methodology
#5
Lauana Pellanda de Souza, Lêda Rita D'Antonino Faroni, Fernanda Fernandes Heleno, Frederico Garcia Pinto, Maria Eliana Lopes Ribeiro de Queiroz, Lucas Henrique Figueiredo Prates
The present study aimed to optimize ozone (O3) treatments, as gas and dissolved in water, to remove difenoconazole and linuron in carrots. We employed a central composite design to study three variables governing the efficacy of treatments: O3 concentration, temperature and treatment time. The temperature did not influence the efficacy of treatments. The removal percentage of pesticides increases with increases in ozone concentration and the time of treatment. O3 application promoted the removal of more than 80% of pesticides when the roots were exposed for approximately 120min at 5 and 10mgL(-1), respectively, in treatments with O3 as gas and dissolved in water...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29145131/removal-of-the-precursors-of-n-nitrosodiethylamine-ndea-an-emerging-disinfection-byproduct-in-drinking-water-treatment-process-and-its-toxicity-to-adult-zebrafish-danio-rerio
#6
Jian Zheng, Tao Lin, Wei Chen
N-nitrosodiethylamine (NDEA) is one of the emerging nitrogenous disinfection byproducts with probable cytotoxicity, genotoxicity, and carcinogenesis. Its potential toxicological effects have received extensive attention but remain to be poorly understood. In this study, changes in NDEA precursors in drinking water treatment process were studied using the trial of its formation potential (FP), and the toxicity induced by NDEA to adult zebrafish was investigated. NDEA FP in the raw water of Taihu Lake ranged from 46...
October 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145006/a-cross-disciplinary-evaluation-of-evidence-for-multipollutant-effects-on-cardiovascular-disease
#7
REVIEW
Thomas J Luben, Barbara J Buckley, Molini M Patel, Tina Stevens, Evan Coffman, Kristen M Rappazzo, Elizabeth O Owens, Erin P Hines, Danielle Moore, Kyle Painter, Ryan Jones, Laura Datko-Williams, Adrien A Wilkie, Meagan Madden, Jennifer Richmond-Bryant
BACKGROUND: The current single-pollutant approach to regulating ambient air pollutants is effective at protecting public health, but efficiencies may be gained by addressing issues in a multipollutant context since multiple pollutants often have common sources and individuals are exposed to more than one pollutant at a time. OBJECTIVE: We performed a cross-disciplinary review of the effects of multipollutant exposures on cardiovascular effects. METHODS: A broad literature search for references including at least two criteria air pollutants (particulate matter [PM], ozone [O3], oxides of nitrogen, sulfur oxides, carbon monoxide) was conducted...
November 13, 2017: Environmental Research
https://www.readbyqxmd.com/read/29142612/trends-and-patterns-of-air-quality-in-santa-cruz-de-tenerife-canary-islands-in-the-period-2011-2015
#8
Jose M Baldasano, Jordi Massagué
Air quality trends and patterns in the coastal city of Santa Cruz de Tenerife (Canary Islands, Spain) for the period 2011-2015 were analyzed. The orographic and meteorological characteristics, the proximity to the African continent, and the influence of the Azores anticyclone in combination with the anthropogenic (oil refinery, road/maritime traffic) and natural emissions create specific dispersion conditions. SO2, NO2, PM10, PM2.5, and O3 pollutants were assessed. The refinery was the primary source of SO2; EU hourly and daily average limit values were exceeded during 2011 and alert thresholds were reached in 2011 and 2012...
2017: Air Quality, Atmosphere, & Health
https://www.readbyqxmd.com/read/29142039/risk-factors-associated-with-juvenile-idiopathic-arthritis-exposure-to-cigarette-smoke-and-air-pollution-from-pregnancy-to-disease-diagnosis
#9
Camila Maria Paiva França, Adriana Maluf Elias Sallum, Alfésio Luis Ferreira Braga, Fernando Louzada Strufaldi, Clovis Artur Almeida Silva, Sylvia Costa Lima Farhat
OBJECTIVE: To evaluate exposure to environmental factors inhaled during pregnancy and after birth until juvenile idiopathic arthritis (JIA) diagnosis among residents of a large city. METHODS: This is an exploratory case-control study that consists of 66 patients with JIA and 124 healthy controls matched by age and sex, living in the São Paulo, Brazil, metropolitan area until JIA diagnosis, and whose mothers had resided in this region during pregnancy. A structured and reliable questionnaire (κ index for test-retest was 0...
November 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/29141605/an-intronic-single-nucleotide-polymorphism-rs13217795-in-foxo3-is-associated-with-asthma-and-allergic-rhinitis-a-case-case-control-study
#10
Justin Z Amarin, Randa G Naffa, Haya H Suradi, Yousof M Alsaket, Nathir M Obeidat, Tareq M Mahafza, Malek A Zihlif
BACKGROUND: Asthma and allergic rhinitis are respiratory diseases with a significant global burden. Forkhead box O3 (FOXO3) is a gene involved in the etiology of a number of respiratory diseases. The objective of this study is to assess the association of rs13217795, an intronic FOXO3 single-nucleotide polymorphism, with asthma and allergic rhinitis. METHODS: In this case-case-control genetic association study, genotyping was conducted using the PCR-RFLP method...
November 15, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/29140598/disinfection-of-chicken-fillets-in-packages-with-atmospheric-cold-plasma-effects-of-treatment-voltage-and-time
#11
Jiamei Wang, Hong Zhuang, Kurt Lawrence, Jianhao Zhang
AIMS: To study effects of treatment voltage and time of in-package atmospheric cold plasmas (ACP) on quality of raw chicken meat. METHODS AND RESULTS: Meat was packed in trays in air, treated with ACP, and stored at 4°C for 24 h or 3 d. Increasing voltage from 55 to 80 kV caused increasing O3 inside packages, but had no effects on microbes, color, and pH after 24-h storage at 4°C. There were no differences in O3 , microbes, color lightness, and pH between treatment times 3, 6 and 9 min at 80 kV after 3-d storage...
November 15, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29138094/foxo1-3-potential-suppressors-of-fibrosis
#12
REVIEW
Zhenlong Xin, Zhiqiang Ma, Wei Hu, Shuai Jiang, Zhi Yang, Tian Li, Fulin Chen, Guozhan Jia, Yang Yang
Fibrosis is a universally age-related disease that involves nearly all organs. It is typically initiated by organic injury and eventually results in organ failure. There are still few effective therapeutic strategy targets for fibrogenesis. Forkhead box proteins O1 and O3 (FOXO1/3) have been shown to have favorable inhibitory effects on fibroblast activation and subsequent extracellular matrix production and can ameliorate fibrosis levels in numerous organs, including the heart, liver, lung, and kidney; they are therefore promising targets for anti-fibrosis therapy...
November 11, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/29136337/production-of-jet-fuel-range-hydrocarbons-from-hydrodeoxygenation-of-lignin-over-super-lewis-acid-combined-with-metal-catalysts
#13
Hongliang Wang, Huamin Wang, Eric Kuhn, Melvin P Tucker, Bin Yang
Super Lewis acids containing the triflate anion [e.g., Hf(OTf)4 , Ln(OTf)3 , In(OTf)3 , Al(OTf)3 ] and noble metal catalysts (e.g., Ru/C, Ru/Al2 O3 ) formed efficient catalytic systems to generate saturated hydrocarbons from lignin in high yields. In such catalytic systems, the metal triflates mediated rapid ether bond cleavage through selective bonding to etheric oxygens while the noble metal catalyzed subsequent hydrodeoxygenation (HDO) reactions. Near theoretical yields of hydrocarbons were produced from lignin model compounds by the combined catalysis of Hf(OTf)4 and ruthenium-based catalysts...
November 14, 2017: ChemSusChem
https://www.readbyqxmd.com/read/29134527/the-removal-of-cod-and-nh3-n-from-atrazine-production-wastewater-treatment-using-uv-o3-experimental-investigation-and-kinetic-modeling
#14
Liang Jing, Bing Chen, Diya Wen, Jisi Zheng, Baiyu Zhang
In this study, a UV/O3 hybrid advanced oxidation system was used to remove chemical oxygen demand (COD), ammonia nitrogen (NH3-N), and atrazine (ATZ) from ATZ production wastewater. The removal of COD and NH3-N, under different UV and O3 conditions, was found to follow pseudo-first-order kinetics with rate constants ranging from 0.0001-0.0048 and 0.0015-0.0056 min(-1), respectively. The removal efficiency of ATZ was over 95% after 180 min treatment, regardless the level of UV power. A kinetic model was further proposed to simulate the removal processes and to quantify the individual roles and contributions of photolysis, direct O3 oxidation, and hydroxyl radical (OH·) induced oxidation...
November 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29131447/effect-of-various-treatment-modalities-on-surface-characteristics-and-shear-bond-strengths-of-polyetheretherketone-based-core-materials
#15
Ahmet Kürşat Çulhaoğlu, Serhat Emre Özkır, Volkan Şahin, Burak Yılmaz, Mehmet Ali Kılıçarslan
PURPOSE: To investigate the effect of different surface treatments on the surface roughness (Ra), wettability, and shear bond strength of polyetheretherketone (PEEK) to composite resin. MATERIALS AND METHODS: One hundred ninety eight PEEK specimens were divided into six groups (n = 33). Specimen surfaces were treated with the following surface treatment modalities: silicoating (CoJet), acetone treatment, acid etching (H2 SO4 ), airborne particle abrasion (Al2 O3 ), laser irradiation (Yb:PL laser), and the nontreated surface serving as the control...
November 13, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29129430/relationship-of-particulate-matter-and-ozone-with-3-nitrotyrosine-in-the-atmosphere
#16
Tatsuo Ito, Keiki Ogino, Kenjiro Nagaoka, Kei Takemoto
The prevalence of allergic diseases has increased in the past few decades. Bio-aerosol proteins and their chemical modifications, such as 3-nitrotyrosine (3-NT), in the atmosphere have been attracting attention due to their promotive effects on allergies. 3-NT is generated from the amino acid, tyrosine, through a reaction with ozone (O3) and nitrogen dioxide (NO2). However, the underlying mechanisms have not yet been elucidated in detail. Therefore, we measured 3-NT and evaluated the relationships among 3-NT and various pollutants such as sulfur dioxide (SO2), NOx (NO + NO2), ozone (O3), PM7, total suspended particulate matter (TSP) containing proteins, humidity, and temperature...
November 9, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29128249/nationwide-ground-level-ozone-measurements-in-china-suggest-serious-risks-to-forests
#17
Pin Li, Alessandra De Marco, Zhaozhong Feng, Alessandro Anav, Daojing Zhou, Elena Paoletti
We processed hourly ozone (O3) concentrations collected in 2015 and in 2016 by a network of 1497 stations across China, with the main aim of assessing the risk that present ambient O3 exposure is posing to Chinese forests. Our results indicate that the values of the metrics AOT40 (the accumulated hourly O3 concentrations above 40 ppb during daylight hours) recommended as European Union standard, and W126 (the sum of weighted hourly concentrations from 8:00 to 20:00) recommended as USA standard for forest protection, exceeded the critical levels (5 ppm h across 6 months for AOT40 and 7-21 ppm h over 3 months for W126) on average by 5...
November 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29127924/application-of-peroxymonosulfate-ozone-advanced-oxidation-process-for-simultaneous-waste-activated-sludge-stabilization-and-dewatering-purposes-a-comparative-study
#18
Gagik Badalians Gholikandi, Nazanin Zakizadeh, Hamidreza Masihi
In this study, the efficiency of the Peroxymonosulfate-ozone (PMS+O3) advanced oxidation process in lab scale by the aim of stabilization and dewatering the biological excess sludge was investigated and the results were compared with persulfate-ozone (PS+O3), hydrogen peroxide-ozone (H2O2+O3) and ozonation (O3) processes. The results show that the PMS+O3 is more effective than other mentioned procedures. Therefore, under optimized conditions (pH = 11, PMS/O3 = 0.06 and Dose O3 = 12.5 mmol), VS (Volatile solids) and fecal coliforms reduced respectively 42% and 89% after 60 min and the stabilized sludge in term of pathogen reduction requirements was class B...
November 8, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29121933/biochemical-analysis-and-the-preliminary-crystallographic-characterization-of-d-tagatose-3-epimerase-from-rhodobacter-sphaeroides
#19
Zhengliang Qi, Zhangliang Zhu, Jian-Wen Wang, Songtao Li, Qianqian Guo, Panpan Xu, Fuping Lu, Hui-Min Qin
BACKGROUND: D-Tagatose 3-epimerase epimerizes D-fructose to yield D-psicose, which is a rare sugar that exists in small quantities in nature and is difficult to synthesize chemically. We aim to explore potential industrial biocatalysts for commercial-scale manufacture of this rare sugar. A D-tagatose 3-epimerase from Rhodobacter sphaeroides (RsDTE) has recently been identified as a D-tagatose 3-epimerase that can epimerize D-fructose to yield D-psicose with a high conversion rate. RESULTS: The purified RsDTE by Ni-affinity chromatography, ionic exchange chromatography and gel filtration forms a tetramer in solution...
November 9, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/29121601/nox-promotion-of-so2-conversion-to-sulfate-an-important-mechanism-for-the-occurrence-of-heavy-haze-during-winter-in-beijing
#20
Jinzhu Ma, Biwu Chu, Jun Liu, Yongchun Liu, Hongxing Zhang, Hong He
In this study, concentrations of NOx, SO2, O3 and fine particles (PM2.5) were measured at three monitoring stations in Beijing during 2015. For extreme haze episodes during 25 Nov. - 3 Dec. 2015, observation data confirmed that high concentrations of NOx promoted the conversion of SO2 to sulfate. Annual data confirmed that this is an important mechanism for the occurrence of heavy haze during winter in Beijing. Furthermore, in situ perturbation experiments in a potential aerosol mass (PAM) reactor were carried out at Shengtaizhongxin (STZX) station during both clean and polluted days...
November 6, 2017: Environmental Pollution
keyword
keyword
108436
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"