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https://www.readbyqxmd.com/read/28724249/occurrence-and-source-apportionment-of-atmospheric-halogenated-flame-retardants-in-lhasa-city-in-the-tibetan-plateau-china
#1
Wan-Li Ma, Wen-Long Li, Zi-Feng Zhang, Li-Yan Liu, Wei-Wei Song, Chun-Yan Huo, Yi-Xing Yuan, Yi-Fan Li
Active air samples were collected in Lhasa, one of the highest cities in the world (3650m above sea level) located in the Tibetan Plateau, and were analyzed for 38 halogenated flame retardants (HFRs), including polybrominated diphenyl ethers (PBDEs), non-PBDE brominated flame retardants (NBFRs) and dechlorane plus (DPs). The median concentrations of PBDEs, NBFRs and DPs were 40, 23 and 0.21pg/m(3), respectively. Correlation analysis indicated the common source and/or similar environmental behavior for several HFRs...
July 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28720786/a-few-enlarged-chloroplasts-are-less-efficient-in-photosynthesis-than-a-large-population-of-small-chloroplasts-in-arabidopsis-thaliana
#2
Dongliang Xiong, Jianliang Huang, Shaobing Peng, Yong Li
The photosynthetic, biochemical, and anatomical traits of accumulation and replication of chloroplasts (arc) mutants of Arabidopsis thaliana were investigated to study the effects of chloroplast size and number on photosynthesis. Chloroplasts were found to be significantly larger, and the chloroplast surface area exposed to intercellular air spaces (S c) significantly lower in the mutants than in their wild-types. The decreased S c and increase cytoplasm thickness in the mutants resulted in a lower mesophyll conductance (g m) and a consequently lower chloroplast CO2 concentration (C c)...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719822/heavy-truck-restrictions-and-air-quality-implications-in-s%C3%A3-o-paulo-brazil
#3
Pedro José Pérez-Martínez, María de Fátima Andrade, Regina Maura de Miranda
This study quantified the effects of traffic restrictions on diesel fuel heavy vehicles (HVs) on the air quality of the Bandeirantes corridor using hourly data obtained by continuous monitoring of traffic and air quality at sites located on this avenue. The study addressed the air quality of a city impacted by vehicular emissions and that PM10 and NOX concentrations are mainly due to diesel burning. Data collection was split into two time periods, a period of no traffic constraint on HVs (Nov 2008 and 2009) and a period of constraint (Nov 2010, 2011 and 2012)...
July 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28719431/bispectral-index-measurements-are-not-degraded-during-aeromedical-evacuations
#4
Nicolas Donat, Audrey Cirodde, Clément Hoffmann, Jean-Vivien Schaal, Yannick Masson, Antoine Nau, Paul Vincent Martin, Samuel Madec, Thomas Leclerc
For a decade, depth of anesthesia monitoring has become a reality in the operating room. It provides valuable help for managing anesthesia, especially for unstable patients. This might be particularly relevant during aeromedical evacuation. In this study, we aimed to assess the validity of the bispectral index (BIS) during long-range patient transportation aboard fixed-wing aircraft. BIS was recorded in 30 patients, 25 under anesthesia and 5 awake, during aeromedical evacuations performed by the French Air Force...
July 14, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28719193/relationships-between-atmospheric-transport-regimes-and-pcb-concentrations-in-air-at-zeppelin-spitsbergen
#5
Sandy Ubl, Martin Scheringer, Konrad Hungerbühler
Polychlorinated biphenyls (PCBs) are persistent hazardous chemicals that are still detected in the atmosphere and other environmental media although their production has been banned for several decades. At the long-term monitoring site, Zeppelin at Spitsbergen, different PCB congeners have been continuously measured for more than a decade. However, it is not clear what factors determine the seasonal and inter-annual variability of different (lighter vs. heavier) PCB congeners. To investigate the influence of atmospheric transport patterns on PCB-28 and PCB-101 concentrations at Zeppelin, we applied the Lagrangian Particle Dispersion Model FLEXPART and calculated "footprints'' that indicate the potential source regions of air arriving at Zeppelin...
July 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28717169/how-transfer-flights-shape-the-structure-of-the-airline-network
#6
Tomasz Ryczkowski, Agata Fronczak, Piotr Fronczak
In this paper, we analyse the gravity model in the global passenger air-transport network. We show that in the standard form, the model is inadequate for correctly describing the relationship between passenger flows and typical geo-economic variables that characterize connected countries. We propose a model for transfer flights that allows exploitation of these discrepancies in order to discover hidden subflows in the network. We illustrate its usefulness by retrieving the distance coefficient in the gravity model, which is one of the determinants of the globalization process...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28715774/model-elucidating-the-sources-and-formation-mechanisms-of-severe-haze-pollution-over-northeast-mega-city-cluster-in-china
#7
Ting Yang, Alex Gbaguidi, Pingzhong Yan, Wending Zhang, Lili Zhu, Xuefeng Yao, Zifa Wang, Hui Chen
Recent studies on regional haze pollution over China come up in general with strong variability of main causes of heavy polluted episodes, in linkage with local specificities, sources and pollution characteristics. This paper therefore aims at elucidating the main specific sources and formation mechanisms of observed strong haze pollution episodes over 1-15 November 2015 in Northeast region considered as one of biggest megacity clusters in China. The Northeast China mega-city cluster, including Heilong Jiang, Jilin and Liaoning provinces, is adjacent to Russia in the north, Mongolian at the west, North Korea at east, and representing key geographical location in the regional and transnational air pollution issues in China due to the presence of heavy industries and intense economic activities...
July 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715632/all-graphene-oxide-flexible-solid-state-supercapacitors-with-enhanced-electrochemical-performance
#8
Chikako Ogata, Ruriko Kurogi, Keisuke Awaya, Kazuto Hatakeyama, Takaaki Taniguchi, Michio Koinuma, Yasumichi Matsumoto
The rapid development of flexible and wearable electronics has led to an increase in the demand for flexible supercapacitors with enhanced electrochemical performance. Graphene oxide (GO) and reduced GO (rGO) exhibit several key properties required for supercapacitor components. Although solid-state rGO/GO/rGO supercapacitors with unique structures are promising, their moderate capacitance is inadequate for practical applications. Herein, we report a flexible solid-state rGO/GO/rGO supercapacitor comprising H2SO4-intercalated GO electrolyte/separator and pseudo-capacitive rGO electrodes, which demonstrate excellent electrochemical performance...
July 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28715091/strongly-enhanced-photovoltaic-performance-and-defect-physics-of-air-stable-bismuth-oxyiodide-bioi
#9
Robert L Z Hoye, Lana C Lee, Rachel C Kurchin, Tahmida N Huq, Kelvin H L Zhang, Melany Sponseller, Lea Nienhaus, Riley E Brandt, Joel Jean, James Alexander Polizzotti, Ahmed Kursumović, Moungi G Bawendi, Vladimir Bulović, Vladan Stevanović, Tonio Buonassisi, Judith L MacManus-Driscoll
Bismuth-based compounds have recently gained increasing attention as potentially nontoxic and defect-tolerant solar absorbers. However, many of the new materials recently investigated show limited photovoltaic performance. Herein, one such compound is explored in detail through theory and experiment: bismuth oxyiodide (BiOI). BiOI thin films are grown by chemical vapor transport and found to maintain the same tetragonal phase in ambient air for at least 197 d. The computations suggest BiOI to be tolerant to antisite and vacancy defects...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28711845/the-impact-of-synoptic-circulation-on-air-quality-and-pollution-related-human-health-in-the-yangtze-river-delta-region
#10
Zhiheng Liao, Meng Gao, Jiaren Sun, Shaojia Fan
PM2.5 and O3 pollution are of concern for the Yangtze River Delta (YRD) region due to their adverse impact on human health. In conjunction with a complex distribution of emission sources, the synoptic circulation conditions control the temporal and spatial variability of air pollution levels and hence the pollution-related health burdens. In this study, a long-term synoptic circulation catalogue is developed by applying the automated Lamb weather type method to the ECMWF mean sea level pressure reanalysis for the YRD region during 2013-2016...
July 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28710612/-diagnostic-quality-of-triage-algorithms-for-mass-casualty-incidents
#11
A R Heller, N Salvador, M Frank, J Schiffner, R Kipke, C Kleber
BACKGROUND: Regarding survival and quality of life, recent mass casualty incidents have once more emphasized the importance of early identification of the correct degree of injury or illness, to enable prioritizing treatment of patients and transportation to an appropriate hospital. The present study investigated international triage algorithms in terms of sensitivity (SE) and specificity (SP) as well as the process duration in a relevant emergency patient cohort. METHODS: A total of 500 consecutive air rescue missions were evaluated by means of standardized patient records...
July 14, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28709041/long-term-monitoring-of-atmospheric-pcdd-fs-at-mount-lulin-during-spring-season-pcdd-f-source-apportionment-through-a-simultaneous-measurement-in-southeast-asia
#12
Ngo Tuan Hung, Chueh Ting Li, Sheng Hsiang Wang, Chang-Feng Ou-Yang, Chuan-Yao Lin, Chung-Te Lee, Neng-Huei Lin, Kai Hsien Chi
A long term assessment of atmospheric polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) at Mt. Lulin, located in center of Taiwan was carried out from 2008 to 2013 (n = 81) assuming Mt. Lulin to be background area. During monitoring processes, PCDD/F samples collected in the field occasionally reached high concentration. To investigate this situation, simultaneous sample collection was carried out in Southeast Asia countries (i.e., Vietnam and Thailand) and Taiwan in 2013. The average concentration of atmospheric PCDD/Fs in biomass-burning source regions, namely Son La and Doi Ang Khang were 19...
June 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28702911/kinetics-of-210-po-accumulation-in-moss-body-profiles
#13
Magdalena Długosz-Lisiecka
Radionuclide concentration analysis of total moss bodies often gave relatively different results than a separate analysis of each different morphological part of the same sample. The dynamics of the transfer of metals by dust uplifted from the soil and another approach, based on the diffusion of the two radionuclides to the moss, have been analyzed. In the proposed model, short- and long-term approaches have been applied. Each part of a moss's profile can show different radionuclides accumulation ability, including both (210)Pb and (210)Po isotopes...
July 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28702086/transcriptome-and-key-genes-expression-related-to-carbon-fixation-pathways-in-chlorella-py-zu1-cells-and-their-growth-under-high-concentrations-of-co2
#14
Yun Huang, Jun Cheng, Hongxiang Lu, Yong He, Junhu Zhou, Kefa Cen
BACKGROUND: The biomass yield of Chlorella PY-ZU1 drastically increased when cultivated under high CO2 condition compared with that cultivated under air condition. However, less attention has been given to the microalgae photosynthetic mechanisms response to different CO2 concentrations. The genetic reasons for the higher growth rate, CO2 fixation rate, and photosynthetic efficiency of microalgal cells under higher CO2 concentration have not been clearly defined yet. RESULTS: In this study, the Illumina sequencing and de novo transcriptome assembly of Chlorella PY-ZU1 cells cultivated under 15% CO2 were performed and compared with those of cells grown under air...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28697387/influence-of-continental-organic-aerosols-to-the-marine-atmosphere-over-the-east-china-sea-insights-from-lipids-pahs-and-phthalates
#15
Mingjie Kang, Fan Yang, Hong Ren, Wanyu Zhao, Ye Zhao, Linjie Li, Yu Yan, Yingjie Zhang, Senchao Lai, Yingyi Zhang, Yang Yang, Zifa Wang, Yele Sun, Pingqing Fu
Total suspended particle (TSP) samples were collected during a marine cruise in the East China Sea from May 18 to June 12, 2014. They were analyzed for solvent extractable organic compounds (lipid compounds, PAHs and phthalates) using gas chromatography/mass spectrometry (GC/MS) to better understand the sources and source apportionment of aerosol pollution in the western North Pacific. Higher concentrations were observed in the terrestrially influenced aerosol samples on the basis of five-day backward air mass trajectories, especially for aerosols collected near coastal areas...
July 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28694528/balancing-hole-and-electron-conduction-in-ambipolar-split-gate-thin-film-transistors
#16
Hocheon Yoo, Matteo Ghittorelli, Dong-Kyu Lee, Edsger C P Smits, Gerwin H Gelinck, Hyungju Ahn, Han-Koo Lee, Fabrizio Torricelli, Jae-Joon Kim
Complementary organic electronics is a key enabling technology for the development of new applications including smart ubiquitous sensors, wearable electronics, and healthcare devices. High-performance, high-functionality and reliable complementary circuits require n- and p-type thin-film transistors with balanced characteristics. Recent advancements in ambipolar organic transistors in terms of semiconductor and device engineering demonstrate the great potential of this route but, unfortunately, the actual development of ambipolar organic complementary electronics is currently hampered by the uneven electron (n-type) and hole (p-type) conduction in ambipolar organic transistors...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694449/future-changes-in-the-climatology-of-the-great-plains-low-level-jet-derived-from-fine-resolution-multi-model-simulations
#17
Ying Tang, Julie Winkler, Shiyuan Zhong, Xindi Bian, Dana Doubler, Lejiang Yu, Claudia Walters
The southerly Great Plains low-level jet (GPLLJ) is one of the most significant circulation features of the central U.S. linking large-scale atmospheric circulation with the regional climate. GPLLJs transport heat and moisture, contribute to thunderstorm and severe weather formation, provide a corridor for the springtime migration of birds and insects, enhance wind energy availability, and disperse air pollution. We assess future changes in GPLLJ frequency using an eight member ensemble of dynamically-downscaled climate simulations for the mid-21st century...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28692913/particle-and-bioaerosol-characteristics-in-a-paediatric-intensive-care-unit
#18
Congrong He, Ian M Mackay, Kay Ramsay, Zhen Liang, Timothy Kidd, Luke D Knibbs, Graham Johnson, Donna McNeale, Rebecca Stockwell, Mark G Coulthard, Debbie A Long, Tara J Williams, Caroline Duchaine, Natalie Smith, Claire Wainwright, Lidia Morawska
The paediatric intensive care unit (PICU) provides care to critically ill neonates, infants and children. These patients are vulnerable and susceptible to the environment surrounding them, yet there is little information available on indoor air quality and factors affecting it within a PICU. To address this gap in knowledge we conducted continuous indoor and outdoor airborne particle concentration measurements over a two-week period at the Royal Children's Hospital PICU in Brisbane, Australia, and we also collected 82 bioaerosol samples to test for the presence of bacterial and viral pathogens...
July 7, 2017: Environment International
https://www.readbyqxmd.com/read/28692746/noncovalent-se%C3%A2-%C3%A2-%C3%A2-o-conformational-locks-for-constructing-high-performing-optoelectronic-conjugated-polymers
#19
Tao Dong, Lei Lv, Linlin Feng, Yu Xia, Wei Deng, Pan Ye, Bei Yang, Shang Ding, Antonio Facchetti, Huanli Dong, Hui Huang
Noncovalent conformational locks are broadly employed to construct highly planar π-conjugated semiconductors exhibiting substantial charge transport characteristics. However, current chalcogen-based conformational lock strategies for organic semiconductors are limited to S···X (X = O, N, halide) weak interactions. An easily accessible (minimal synthetic steps) and structurally planar selenophene-based building block, 1,2-diethoxy-1,2-bisselenylvinylene (DESVS), with novel Se···O noncovalent conformational locks is designed and synthesized...
July 10, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28688292/impact-of-air-masses-on-the-distribution-of-210-pb-in-the-southeast-of-iberian-peninsula-air
#20
E Chham, F Piñero-García, P González-Rodelas, M A Ferro-García
The current research has been developed in the southern of the Iberian Peninsula in order to better understand the atmospheric processes and also the influence of the air masses origin and pathways in the transport of (210)Pb-aerosols in the atmosphere. Simultaneous measurements of the radionuclides (7)Be and (210)Pb on airborne have been routinely carried out at Granada (Spain 37.177N, 3.598 W, 687 m a.s.l.) from 2010 to 2014. The long term monitoring evolution on (210)Pb is discussed in this study and also the useful ratio (7)Be/(210)Pb...
July 5, 2017: Journal of Environmental Radioactivity
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