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https://www.readbyqxmd.com/read/28647258/influence-of-haze-pollution-on-water-soluble-chemical-species-in-pm2-5-and-size-resolved-particles-at-an-urban-site-during-fall
#1
Geun-Hye Yu, Yan Zhang, Sung-Yong Cho, Seungshik Park
To investigate the influence of haze on the chemical composition and formation processes of ambient aerosol particles, PM2.5 and size-segregated aerosol particles were collected daily during fall at an urban site of Gwangju, Korea. During the study period, the total concentration of secondary ionic species (SIS) contributed an average of 43.9% to the PM2.5, whereas the contribution of SIS to the PM2.5 during the haze period was 62.3%. The NO3(-) and SO4(2-) concentrations in PM2.5 during the haze period were highly elevated, being 13...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647220/investigation-of-zinc-recovery-by-hydrogen-reduction-assisted-pyrolysis-of-alkaline-and-zinc-carbon-battery-waste
#2
Burçak Ebin, Martina Petranikova, Britt-Marie Steenari, Christian Ekberg
Zinc (Zn) recovery from alkaline and zinc-carbon (Zn-C) battery waste were studied by a laboratory scale pyrolysis process at a reaction temperature of 950°C for 15-60min residence time using 5%H2(g)-N2(g) mixture at 1.0L/min gas flow rate. The effect of different cooling rates on the properties of pyrolysis residue, manganese oxide particles, were also investigated. Morphological and structural characterization of the produced Zn particles were performed. The battery black mass was characterized with respect to the properties and chemical composition of the waste battery particles...
June 21, 2017: Waste Management
https://www.readbyqxmd.com/read/28646231/inter-annual-variability-of-transparent-exopolymer-particles-in-the-arctic-ocean-reveals-high-sensitivity-to-ecosystem-changes
#3
Anja Engel, Judith Piontek, Katja Metfies, Sonja Endres, Pim Sprong, Ilka Peeken, Steffi Gäbler-Schwarz, Eva-Maria Nöthig
Transparent exopolymer particles (TEP) are a class of marine gel particles and important links between surface ocean biology and atmospheric processes. Derived from marine microorganisms, these particles can facilitate the biological pumping of carbon dioxide to the deep sea, or act as cloud condensation and ice nucleation particles in the atmosphere. Yet, environmental controls on TEP abundance in the ocean are poorly known. Here, we investigated some of these controls during the first multiyear time-series on TEP abundance for the Fram Strait, the Atlantic gateway to the Central Arctic Ocean...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28645959/formal-consensus-to-identify-clinically-important-changes-in-management-resulting-from-the-use-of-cardiovascular-magnetic-resonance-cmr-in-patients-who-activate-the-primary-percutaneous-coronary-intervention-ppci-pathway
#4
Maria Pufulete, Rachel C Brierley, Chiara Bucciarelli-Ducci, John P Greenwood, Stephen Dorman, Richard A Anderson, Jessica Harris, Elisa McAlindon, Chris A Rogers, Barnaby C Reeves
OBJECTIVE: To define important changes in management arising from the use of cardiovascular magnetic resonance (CMR) in patients who activate the primary percutaneous coronary intervention (PPCI) pathway. DESIGN: Formal consensus study using literature review and cardiologist expert opinion to formulate consensus statements and setting up a consensus panel to review the statements (by completing a web-based survey, attending a face-to-face meeting to discuss survey results and modify the survey to reflect group discussion and completing the modified survey to determine which statements were in consensus)...
June 22, 2017: BMJ Open
https://www.readbyqxmd.com/read/28645915/cebranopadol-blocks-the-escalation-of-cocaine-intake-and-conditioned-reinstatement-of-cocaine-seeking-in-rats
#5
Giordano de Guglielmo, Alessandra Matzeu, Jenni Kononoff, Julia Mattioni, Remi Martin-Fardon, Olivier George
Cebranopadol is a novel agonist of nociceptin/orphanin FQ peptide (NOP) and opioid receptors with analgesic properties that is being evaluated in clinical Phase 2 and Phase 3 trials for the treatment of chronic and acute pain. Recent evidence indicates that the combination of opioid and NOP receptor agonism may be a new treatment strategy for cocaine addiction. We sought to extend these findings by examining the effects of cebranopadol on cocaine self-administration (0.5 mg/kg/infusion) and cocaine conditioned reinstatement in rats with extended access to cocaine...
June 23, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28645666/color-masking-measurement-for-ceramic-coating-of-titanium-used-for-dental-implants
#6
Khaldoun Ajlouni, Waleed Elshahawy, Raed Ajlouni, Abdelfattah Sadakah
STATEMENT OF PROBLEM: Poor implant placement or thin gingival tissue and progressive bone resorption may lead to the dark metal color showing through the peri-implant soft tissue. Whether the dark color can be adequately masked is unclear. PURPOSE: The purpose of this in vitro study was to test the color masking effect of porcelain applied on titanium used in fabricating the polished collar of tissue level implants. MATERIAL AND METHODS: Type 4 commercially pure titanium disks and 5 porcelain dentin shades (A2, A3, B2, C2, and D3) were used...
June 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28645658/spacer-structure-and-hydrophobicity-influences-transfection-activity-of-novel-polycationic-gemini-amphiphiles
#7
Pavel A Puchkov, Irina A Kartashova, Elena V Shmendel, Anastasya S Luneva, Nina G Morozova, Marina A Zenkova, Mikhail A Maslov
Three novel polycationic gemini amphiphiles with different spacers were developed and evaluated in terms of their physiochemical properties and transfection efficiencies. Cationic liposomes formed by these amphiphiles and the helper lipid DOPE were able to successfully condense DNA, as shown by gel mobility shift and ethidium bromide intercalation assays. Transfection activity of the liposomes was superior to Lipofectamine(®) 2000 and was dependent on spacer structure, hydrophobicity, and nucleic acid type (pDNA or siRNA)...
June 10, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28644669/entanglement-and-nonlocality-in-infinite-1d-systems
#8
Zizhu Wang, Sukhwinder Singh, Miguel Navascués
We consider the problem of detecting entanglement and nonlocality in one-dimensional (1D) infinite, translation-invariant (TI) systems when just near-neighbor information is available. This issue is deeper than one might think a priori, since, as we show, there exist instances of local separable states (classical boxes) which admit only entangled (nonclassical) TI extensions. We provide a simple characterization of the set of local states of multiseparable TI spin chains and construct a family of linear witnesses which can detect entanglement in infinite TI states from the nearest-neighbor reduced density matrix...
June 9, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28644648/crossing-over-from-attractive-to-repulsive-interactions-in-a-tunneling-bosonic-josephson-junction
#9
G Spagnolli, G Semeghini, L Masi, G Ferioli, A Trenkwalder, S Coop, M Landini, L Pezzè, G Modugno, M Inguscio, A Smerzi, M Fattori
We explore the interplay between tunneling and interatomic interactions in the dynamics of a bosonic Josephson junction. We tune the scattering length of an atomic ^{39}K Bose-Einstein condensate confined in a double-well trap to investigate regimes inaccessible to other superconducting or superfluid systems. In the limit of small-amplitude oscillations, we study the transition from Rabi to plasma oscillations by crossing over from attractive to repulsive interatomic interactions. We observe a critical slowing down in the oscillation frequency by increasing the strength of an attractive interaction up to the point of a quantum phase transition...
June 9, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28644646/bottleneck-accumulation-of-hybrid-magnetoelastic-bosons
#10
Dmytro A Bozhko, Peter Clausen, Gennadii A Melkov, Victor S L'vov, Anna Pomyalov, Vitaliy I Vasyuchka, Andrii V Chumak, Burkard Hillebrands, Alexander A Serga
An ensemble of magnons, quanta of spin waves, can be prepared as a Bose gas of weakly interacting quasiparticles. Furthermore, the thermalization of the overpopulated magnon gas through magnon-magnon scattering processes, which conserve the number of particles, can lead to the formation of a Bose-Einstein condensate at the bottom of a spin-wave spectrum. However, magnon-phonon scattering can significantly modify this scenario and new quasiparticles are formed-magnetoelastic bosons. Our observations of a parametrically populated magnon gas in a single-crystal film of yttrium iron garnet by means of wave-vector-resolved Brillouin light scattering spectroscopy evidence a novel condensation phenomenon: A spontaneous accumulation of hybrid magnetoelastic bosonic quasiparticles at the intersection of the lowest magnon mode and a transversal acoustic wave...
June 9, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28644527/an-audit-on-technical-quality-of-root-fillings-performed-by-undergraduate-students
#11
W Fong, O Heidarifar, S Killough, M Lappin, I A El Karim
AIM: To evaluate radiographically the technical quality of root fillings performed by undergraduate dental students and to assess whether students were exposed to an appropriate endodontic case mix during their clinical training. METHODOLOGY: A retrospective audit was undertaken evaluating the clinical records of patients who underwent endodontic procedures during the period from September 2015 to June 2016 in the Dental School at Queen's University Belfast, UK...
June 23, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28644517/quantitative-insights-into-the-fast-pyrolysis-of-extracted-cellulose-hemicelluloses-and-lignin
#12
Marion Carrier, Michael Windt, Bernhard Ziegler, Jörn Appelt, Bodo Saake, Dietrich Meier, Anthony Bridgwater
The transformation of lignocellulosic biomass into bio-based commodity chemicals is technically possible. Among thermochemical processes, fast pyrolysis, a relatively mature technology that has now reached the commercial level, produces a high yield of an organic-rich liquid stream. Despite the recent efforts in elucidating the degradation paths of biomass pyrolysis, the selectivity and recovery rates of bio-compounds remain low. In an attempt to clarify the general degradation scheme of biomass fast pyrolysis and provide a quantitative insight, this study has combined the use of fast pyrolysis micro-reactors, spectrometric techniques and mixtures of unlabelled and Carbon-13 enriched materials...
June 23, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28644503/the-first-re-i-organometallic-complex-with-an-organoimido-polyoxometalate-ligand
#13
Patricio Hermosilla-Ibáñez, Kerry Wrighton-Araneda, Gaspar Prado, Verónica Paredes-García, Nancy Pizarro, Andrés Vega, Diego Venegas-Yazigi
The spectroscopic, electrochemical and photophysical properties of the first Re(I) organometallic organoimido-polyoxometalate complex [n-Bu4N][Mo6O18NC6H4-CH2-N3C2H2-Re-phen(CO)3] compared with all fragments are reported. The UV-Vis spectra are analysed using experimental and theoretical tools. In contrast to the reported studies in the literature, our results show that a new more intense band is present in the spectra of the hybrid ligand obscuring the intra-polyanion charge transfer. The electrochemical results show that the strong acceptor character of the polyoxometalate fragment is quenched by the condensation of the phenyl-triazole molecule...
June 23, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28644468/observation-of-electron-transfer-mediated-decay-in-aqueous-solution
#14
Isaak Unger, Robert Seidel, Stephan Thürmer, Marvin N Pohl, Emad F Aziz, Lorenz S Cederbaum, Eva Muchová, Petr Slavíček, Bernd Winter, Nikolai V Kryzhevoi
Photoionization is at the heart of X-ray photoelectron spectroscopy (XPS), which gives access to important information on a sample's local chemical environment. Local and non-local electronic decay after photoionization-in which the refilling of core holes results in electron emission from either the initially ionized species or a neighbour, respectively-have been well studied. However, electron-transfer-mediated decay (ETMD), which involves the refilling of a core hole by an electron from a neighbouring species, has not yet been observed in condensed phase...
July 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28644059/carbonic-anhydrase-i-ii-iv-and-ix-inhibition-with-a-series-of-7-amino-3-4-dihydroquinolin-2-1h-one-derivatives
#15
Murat Bozdag, Silvia Bua, Sameh M Osman, Zeid AlOthman, Claudiu T Supuran
A series of new derivatives was prepared by derivatisation of the 7-amino moiety present in 7-amino-3,4-dihydroquinolin-2(1H)-one, a compound investigated earlier as CAI. The derivatisation was achieved by: i) reaction with arylsulfonyl isocyanates/aryl isocyanates; (ii) reaction with fluorescein isothiocyanate; (iii) condensation with substituted benzoic acids in the presence of carbodiimides; (iv) reaction with 2,4,6-trimethyl-pyrylium tetrafluoroborate; (v) reaction with methylsulfonyl chloride and (vi) reaction with maleic anhydride...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28644001/an-evaluation-of-multivalent-cation-insertion-in-single-and-double-layered-polymorphs-of-v2o5
#16
Abhishek Parija, David Prendergast, Sarbajit Banerjee
Multivalent intercalation batteries have the potential to circumvent several fundamental limitations of reigning Li-ion technologies. Such batteries will potentially deliver high volumetric energy densities, be safer to operate, and rely on materials that are much more abundant than Li in the earth's crust. The design of intercalation cathodes for such batteries requires consideration of thermodynamic aspects such as structural distortions and energetics as well as kinetic aspects such as barriers to the diffusion of cations...
June 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28643780/voltage-controlled-interfacial-magnetism-through-platinum-orbits
#17
Shinji Miwa, Motohiro Suzuki, Masahito Tsujikawa, Kensho Matsuda, Takayuki Nozaki, Kazuhito Tanaka, Takuya Tsukahara, Kohei Nawaoka, Minori Goto, Yoshinori Kotani, Tadakatsu Ohkubo, Frédéric Bonell, Eiiti Tamura, Kazuhiro Hono, Tetsuya Nakamura, Masafumi Shirai, Shinji Yuasa, Yoshishige Suzuki
Electric fields at interfaces exhibit useful phenomena, such as switching functions in transistors, through electron accumulations and/or electric dipole inductions. We find one potentially unique situation in a metal-dielectric interface in which the electric field is atomically inhomogeneous because of the strong electrostatic screening effect in metals. Such electric fields enable us to access electric quadrupoles of the electron shell. Here we show, by synchrotron X-ray absorption spectroscopy, electric field induction of magnetic dipole moments in a platinum monatomic layer placed on ferromagnetic iron...
June 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28643058/prospective-randomized-comparison-of-the-use-of-floshield-air-system-%C3%A2-versus-the-reference-technique-water%C3%A2-%C3%A2-povidone-iodine-solution-during-gynecologic-endoscopic-surgery-to-evaluate-the-operative-lens-vision-quality
#18
S Bendifallah, E Salakos, I Naoura, P Aristizabal, E Furet, S Zilberman, M Ballester, E Darai
BACKGROUND: The FloShield Air System(®) is a new device for laparoscopic surgery that utilizes a continuous dry CO2 gas flow over the scope to defog the lens and protect it from condensation, debris and smoke. We set out to compare the performance and efficiency of the device in terms of operative lens vision quality (OLVQ) with the reference technique (water + povidone-iodine (PVI) solution) during gynecologic laparoscopic surgery. MATERIALS AND METHODS: We conducted a single-center randomized prospective study between March and June 2016 (Trials Database Registration NCT02702531) including 53 patients undergoing gynecologic laparoscopic surgery with water + PVI solution and 51 patients who underwent surgical procedures with the FloShield Air System...
June 22, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28642850/transcriptional-network-controlling-endochondral-ossification
#19
REVIEW
Kenji Hata, Yoshifumi Takahata, Tomohiko Murakami, Riko Nishimura
Endochondral ossification is the fundamental process of skeletal development in vertebrates. Chondrocytes undergo sequential steps of differentiation, including mesenchymal condensation, proliferation, hypertrophy, and mineralization. These steps, which are required for the morphological and functional changes in differentiating chondrocytes, are strictly regulated by a complex transcriptional network. Biochemical and mice genetic studies identified chondrogenic transcription factors critical for endochondral ossification...
May 2017: Journal of Bone Metabolism
https://www.readbyqxmd.com/read/28642616/modulational-instability-of-coupled-ring-waveguides-with-linear-gain-and-nonlinear-loss
#20
Nguyen Viet Hung, Krzysztof Zegadlo, Aliaksandr Ramaniuk, Vladimir V Konotop, Marek Trippenbach
We consider a nanostructure of two coupled ring waveguides with constant linear gain and nonlinear absorption - the system that can be implemented in various settings including polariton condensates, optical waveguides or atomic Bose-Einstein condensates. It is found that, depending on the parameters, this simple configuration allows for observing several complex nonlinear phenomena, which include spontaneous symmetry breaking, modulational instability leading to generation of stable circular flows with various vorticities, stable inhomogeneous states with interesting structure of currents flowing between rings, as well as dynamical regimes having signatures of chaotic behavior...
June 22, 2017: Scientific Reports
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