keyword
MENU ▼
Read by QxMD icon Read
search

O3

keyword
https://www.readbyqxmd.com/read/28938211/current-surface-ozone-concentrations-significantly-decrease-wheat-growth-yield-and-quality
#1
Håkan Pleijel, Malin C Broberg, Johan Uddling, Gina Mills
Tropospheric ozone is known to adversely affect crops and other vegetation. Most studies have focussed on the effects of elevated ozone levels vs. present ambient. We investigated the effect of present ambient surface ozone (O3) concentrations vs. preindustrial on a range of agronomically important response variables in field-grown wheat, using results from 33 experiments (representing 9 countries, 3 continents, 17 cultivars plus one set of 4 cultivars) having both charcoal filtered (CF) and non-filtered (NF) air treatments...
September 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28937752/inverse-association-between-ambient-sulfur-dioxide-exposure-and-semen-quality-in-wuhan-china
#2
Yuewei Liu, Yun Zhou, Jixuan Ma, Wei Bao, Jingjing Li, Ting Zhou, Xiuqing Cui, Zhe Peng, Hai Zhang, Min Feng, Yuan Yuan, Yuanqi Chen, Xiji Huang, Yonggang Li, Yonggang Duan, Tingming Shi, Lei Jin, Li Wu
Evidence concerning the association between ambient gaseous air pollutant exposures and semen quality is sparse, and findings in previous studies remain largely inconsistent. We enrolled 1759 men with 2184 semen examinations at a large reproductive medical center in Wuhan, China between 2013 and 2015. Inverse distance weighting interpolation was performed to estimate individual exposures to SO2, NO2, CO and O3 during the entire period (lag 0-90 days) and key periods (lag 0-9, 10-14, 70-90 days) of sperm development...
September 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28936270/characterization-of-five-year-observation-data-of-fine-particulate-matter-in-the-metropolitan-area-of-lahore
#3
Fatima Khanum, Muhammad Nawaz Chaudhry, Prashant Kumar
This study aims to assess the long-term trend of fine particles (PM2.5; ≤2.5 μm) at two urban sites of Lahore during 2007-2011. These sites represent two distinct areas: commercial (Townhall) and residential cum industrial (Township). The highest daily mean concentrations of PM2.5 were noted as 389 and 354 μg m(-3) at the Townhall and Township sites, respectively. As expected, the annual seasonal mean of PM2.5 was about 53 and 101% higher during winter compared with the summer and monsoon/post-monsoon seasons, respectively...
2017: Air Quality, Atmosphere, & Health
https://www.readbyqxmd.com/read/28932417/tris-%C3%AE-2-methano-lato-%C3%AE-3-oxido-tris-e-4-chloro-2-2-pyridin-2-yl-eth-yl-imino-meth-yl-pheno-lato-manganese-iii-perchlorate-di-chloro-methane-diethyl-ether-1-1-1-0-9
#4
Rita Egekenze, Yilma Gultneh, Ray J Butcher
In the title compound, [Mn3(C14H12ClN2O)3(CH3O)3O]ClO4·1.1CH2Cl2·0.9C4H10O, the cation consists of a central Mn3O core with μ2-methano-late bridging between adjacent Mn(III) atoms, thus giving each Mn(III) atom a mer-O3 coordination environment. Six-coordination for each Mn(III) atom is provided by the deprotonated Schiff base ligand (E)-4-chloro-2-({[2-(pyridin-2-yl)eth-yl]imino}-meth-yl)phenolate. There are extensive C-H⋯O and C-H⋯Cl inter-actions, which link the cations, anions, and solvent mol-ecules into a three-dimensional array...
July 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28929369/air-quality-study-in-the-coastal-city-of-crotone-southern-italy-hosting-a-small-size-harbor
#5
Paola Romagnoli, Francesca Vichi, Catia Balducci, Andrea Imperiali, Mattia Perilli, Lucia Paciucci, Francesco Petracchini, Angelo Cecinato
Particulate polycyclic aromatic hydrocarbons (PAHs), n-alkanes, and gaseous pollutants were collected from the harbor and the urban area of Crotone (Southern Italy) in October 2015. The atmospheric concentrations of organic substances associated to PM10 were determined daily, while gaseous pollutants (BTEX, O3, SO2, NOx, NO2, and NH3) were monitored on monthly basis by means of diffusive sampling. Total PAHs reached, on the average, 1.56 ± 0.72, 0.33 ± 0.14, and 0.59 ± 0.37 ng/m(3) at the urban monitoring stations (Fiore, Fermi) and at the harbor, respectively...
September 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28923952/correction-for-nicoletti-et-al-anomalous-relaxation-kinetics-and-charge-density-wave-correlations-in-underdoped-bapb1-x-bi-x-o3
#6
(no author information available yet)
No abstract text is available yet for this article.
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28923722/high-doses-of-ethylenediurea-edu-as-soil-drenches-did-not-increase-leaf-n-content-or-cause-phytotoxicity-in-willow-grown-in-fertile-soil
#7
Evgenios Agathokleous, Elena Paoletti, William J Manning, Mitsutoshi Kitao, Costas J Saitanis, Takayoshi Koike
Ground-level ozone (O3) levels are nowadays elevated in wide regions of the Earth, causing significant effects on plants that finally lead to suppressed productivity and yield losses. Ethylenediurea (EDU) is a chemical compound which is widely used in research projects as phytoprotectant against O3 injury. The EDU mode of action remains still unclear, while there are indications that EDU may contribute to plants with nitrogen (N) when the soil is poor in N and the plants have relatively small leaf area. To reveal whether the N content of EDU acts as a fertilizer to plants when the soil is not poor in N and the plants have relatively large total plant leaf area, willow plants (Salix sachalinensis Fr...
September 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28919428/metal-mediated-oxidation-of-fluoroquinolone-antibiotics-in-water-a-review-on-kinetics-transformation-products-and-toxicity-assessment
#8
Mingbao Feng, Zunyao Wang, Dionysios D Dionysiou, Virender K Sharma
Fluoroquinolones (FQs) are among the most potent antimicrobial agents, which have seen their increasing use as human and veterinary medicines to control bacterial infections. FQs have been extensively found in surface water and municipal wastewaters, which has raised great concerns due to their negative impacts to humans and ecological health. It is of utmost importance that FQs are treated before their release into the environment. This paper reviews oxidative removal of FQs using reactive oxygen (O3 and OH), sulfate radicals (SO4(-)), and high-valent transition metal (Mn(VII) and Fe(VI)) species...
August 30, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28917207/exposure-to-ambient-air-pollution-and-the-incidence-of-dementia-a-population-based-cohort-study
#9
Hong Chen, Jeffrey C Kwong, Ray Copes, Perry Hystad, Aaron van Donkelaar, Karen Tu, Jeffrey R Brook, Mark S Goldberg, Randall V Martin, Brian J Murray, Andrew S Wilton, Alexander Kopp, Richard T Burnett
INTRODUCTION: Emerging studies have implicated air pollution in the neurodegenerative processes. Less is known about the influence of air pollution, especially at the relatively low levels, on developing dementia. We conducted a population-based cohort study in Ontario, Canada, where the concentrations of pollutants are among the lowest in the world, to assess whether air pollution exposure is associated with incident dementia. METHODS: The study population comprised all Ontario residents who, on 1 April 2001, were 55-85years old, Canadian-born, and free of physician-diagnosed dementia (~2...
September 13, 2017: Environment International
https://www.readbyqxmd.com/read/28917169/short-term-associations-of-ambient-air-pollution-and-cause-specific-emergency-department-visits-in-guangzhou-china
#10
Pi Guo, Wenru Feng, Murui Zheng, Jiayun Lv, Li Wang, Ju Liu, Yanhong Zhang, Gangfeng Luo, Yanting Zhang, Changyu Deng, Tongxing Shi, Pengda Liu, Lin Zhang
BACKGROUND: Evidence of association of ambient air pollution with cause-specific emergency department visits in China is still limited. This study aimed to investigate short-term associations between exposures to air pollutants and daily cause-specific emergency department visits using a large-scale multicenter database involving a total of 65 sentinel hospitals in Guangzhou, the most densely-populated city in south China, during 2013-2015. MATERIAL AND METHODS: We obtained data on 162,771 emergency department visits from 65 hospitals from the Emergency Medical Command Center in Guangzhou between January 1, 2013 and December 31, 2015...
September 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28915459/relationships-of-co2-assimilation-rates-with-exposure-and-flux-based-o3-metrics-in-three-urban-tree-species
#11
Yansen Xu, Bo Shang, Xiangyang Yuan, Zhaozhong Feng, Vicent Calatayud
The relationships of CO2 assimilation under saturated-light conditions (Asat) with exposure- (AOTX, Accumulated Ozone exposure over a hourly Threshold of X ppb) and flux-based (PODY, Phytotoxic Ozone Dose over a hourly threshold Y nmol·m(-2)·s(-1)) O3 metrics was studied on three common urban trees, Fraxinus chinensis (FC), Platanus orientalis (PO) and Robinia pseudoacacia (RP). Parameterizations for a stomatal multiplicative model were proposed for the three species. RP was the species showing lower species-specific maximum stomatal conductance (gmax) and experiencing lower cumulative O3 uptake along the experiment, but in contrast it was the most sensitive to O3...
September 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28912098/melatonin-mediated-upregulation-of-sirt3-attenuates-sodium-fluoride-induced-hepatotoxicity-by-activating-the-mt1-pi3k-akt-pgc-1%C3%AE-signaling-pathway
#12
Chao Song, Jiamin Zhao, Beibei Fu, Dan Li, Tingchao Mao, Wei Peng, Haibo Wu, Yong Zhang
Mitochondrial reactive oxygen species (ROS) production has been implicated in the pathogenesis of fluoride toxicity in liver. Melatonin, an indolamine synthesized in the pineal gland, was previously shown to protect against sodium fluoride (NaF)-induced hepatotoxicity. This study investigated the protective effects of melatonin pretreatment on NaF-induced hepatotoxicity and elucidates the potential mechanism of melatonin-mediated protection. Reducing mitochondrial ROS by melatonin substantially attenuated NaF-induced NADPH oxidase 4 (Nox4) upregulation and cytotoxicity in L-02 cells...
September 11, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28905195/experimental-evidences-for-mir-30b-as-a-negative-regulator-of-foxo3-upregulated-by-kynurenine
#13
Zhi-Qing Duan, Yan Li, Lu Li
Molecular constituents regulated by the microenvironment components profoundly influence the propensity of cancer metastasis, a key event of estimating therapeutic actions of anticancer drugs. On one hand, kynurenine (Kyn), one of the microenvironment components, plays key roles in the metastasis of cancer cells in vivo; on the other hand, forkhead box O3 (FOXO3) can serve as a therapeutic target of various anticancer drugs. However, the effect of Kyn on FOXO3 is still not clear. The current study demonstrated that the selected dose of Kyn significantly upregulated the FOXO3 protein rather than FOXO3 messenger RNA (mRNA) in the lung cancer 95D cells...
September 13, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28898779/ozone-cathode-microbial-desalination-cell-an-innovative-option-to-bioelectricity-generation-and-water-desalination
#14
Abdolmajid Gholizadeh, Ali Asghar Ebrahimi, Mohammad Hossein Salmani, Mohammad Hassan Ehrampoush
Microbial desalination cell (MDC) is a new approach of water desalination methods, which is based on ionic species removal from water in proportion to the electric current generated by bacteria. However, the low current generation and insufficient deionization in this technology have created challenges to improve the process. Here, the performance of MDC using ozone as a new electron acceptor (O3-MDC) was evaluated versus another operated independently with oxygen (O2-MDC). Results showed the maximum open-circuit voltages of 628 and 1331 mV for 20 g L(-1) NaCl desalination in O2-MDC and O3-MDC, respectively...
September 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28895720/temperature-insensitive-piezoelectric-performance-in-pb-zr0-52ti0-42sn0-02nb0-04-o3-ceramics-prepared-by-spark-plasma-sintering
#15
Bing Han, Chunlin Zhao, Zhi-Xiang Zhu, Xin Chen, Yu Han, Duan Hu, Mao-Hua Zhang, Hao Cheng Thong, Ke Wang
Dense Pb(Zr0.52Ti0.42Sn0.02Nb0.04)O3 high-performance piezoceramics were prepared by spark plasma sintering. Phase structure, domain structure, and temperature-dependent electrical properties were systematically investigated. The spark-plasma-sintered ceramics possess a pure perovskite structure with rhombohedral-tetragonal (R-T) phase boundaries and a high Curie temperature of 347 °C. Reliable performance against temperature was observed. First, high strain behavior with a normalized strain d33* of 640 and 710 pm/V occurred at 25 and 150 °C, respectively, varying less than 11%...
September 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28894910/drought-alleviated-the-negative-effects-of-elevated-o3-on-lonicera-maackii-in-urban-area
#16
Sheng Xu, Wei Fu, Xingyuan He, Wei Chen, Weiwei Zhang, Bo Li, Yanqing Huang
Open top chambers were used to study the changes in photosynthesis, physiology and stomata characteristics in 1-year-old Lonicera maackii seedlings exposed to drought (DT, 30%-35% soil saturated water content) or/and elevated ozone (EO, 80 ppb). The results showed that DT or/and EO significantly decreased net photosynthetic rate (Pn), stomatal conductance (gs), maximum photochemical efficiency (Fv/Fm), but increased the activity of superoxide dismutase (SOD), and malondialdehyde content (p < 0.05). Compared with EO alone, the combination of EO and DT caused higher values in Pn, Fv/Fm, SOD activity (p < 0...
September 11, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28892855/oxidizing-capacity-of-the-rural-atmosphere-in-hong-kong-southern-china
#17
Zeyuan Li, Likun Xue, Xue Yang, Qiaozhi Zha, Yee Jun Tham, Chao Yan, Peter K K Louie, Connie W Y Luk, Tao Wang, Wenxing Wang
Atmospheric oxidizing capacity (AOC), dominated by the hydroxyl radical (OH), is an important index of the self-cleaning capacity of atmosphere and plays a vital role in the tropospheric chemistry. To better understand the key processes governing the chemistry of rural atmosphere of southern China, we analyzed the oxidation capacity and radical chemistry at a regional background site in Hong Kong from 23 August to 22 December 2012, which covered the summer, autumn and winter seasons. A chemical box model built on the latest Master Chemical Mechanism (v3...
September 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28891287/quantifying-nonlinear-multiregional-contributions-to-ozone-and-fine-particles-using-an-updated-response-surface-modeling-technique
#18
Jia Xing, Shuxiao Wang, Bin Zhao, Wenjing Wu, Dian Ding, Carey J Jang, Yun Zhu, Xing Chang, Jiandong Wang, Fenfen Zhang, Jiming Hao
Tropospheric ozone (O3) and fine particles (PM2.5) come from both local and regional emissions sources. Due to the nonlinearity in the response of O3 and PM2.5 to their precursors, contributions from multiregional sources are challenging to quantify. Here we developed an updated extended response surface modeling technique (ERSMv2.0) to address this challenge. Multiregional contributions were estimated as the sum of three components: 1) the impacts of local chemistry on the formation of the pollutant associated with the change in its precursor levels at the receptor region; 2) regional transport of the pollutant from the source region to the receptor region; and 3) interregional effects among multiple regions, representing the impacts on the contribution from one source region by other source regions...
September 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28889208/detection-of-human-antibodies-binding-with-smooth-and-rough-lpss-from-proteus-mirabilis-o3-strains-s1959-r110-r45
#19
J Gleńska-Olender, K Durlik, I Konieczna, P Kowalska, J Gawęda, W Kaca
Bacteria of the genus Proteus of the family Enterobacteriaceae are facultative human pathogens responsible mainly for urinary tract and wound infections, bacteremia and the development of rheumatoid arthritis (RA). We have analyzed and compared by ELISA the titer of antibodies in plasmas of healthy individuals and in sera of rheumatoid arthritis patients recognizing a potential host cross-reactive epitope (lysine-galacturonic acid epitopes) present in Proteus lipopolysaccharide (LPS). In our experiments LPSs isolated from two mutants of smooth Proteus mirabilis 1959 (O3), i...
September 9, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28888242/surface-ozone-scenario-and-air-quality-in-the-north-central-part-of-india
#20
Renuka Saini, Ajay Taneja, Pradyumn Singh
Tropospheric pollutants including surface ozone (O3), nitrogen dioxide (NO2), carbon monoxide (CO) and meteorological parameters were measured at a traffic junction (78°2' E and 27°11' N) in Agra, India from January 2012 to December 2012. Temporal analysis of pollutants suggests that annual average mixing ratios of tropospheric pollutants were: O3 - 22.97±23.36ppbV, NO2 - 19.84±16.71ppbV and CO - 0.91±0.86ppmV, with seasonal variations of O3 having maximum mixing ratio during summer season (32.41±19.31ppbV), whereas lowest was found in post-monsoon season (8...
September 2017: Journal of Environmental Sciences (China)
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"