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https://www.readbyqxmd.com/read/28646308/photochemical-generation-of-reactive-intermediates-from-urban-waste-bio-organic-substances-under-uv-and-solar-irradiation
#1
Marcela Prado Silva, Arlen Mabel Lastre-Acosta, Simón Mostafa, Garrett McKay, Karl G Linden, Fernando L Rosario-Ortiz, Antonio Carlos Silva Costa Teixeira
Singlet oxygen ((1)O2), hydroxyl radicals ((•)OH), and excited triplet states of organic matter ((3)OM(*)) play a key role in the degradation of pollutants in aquatic environments. The formation rates and quantum yields (Φ) of these reactive intermediates (RI) through photosensitized reactions of dissolved organic matter (DOM) have been reported in the literature for decades. Urban biowaste-derived substances (UW-BOS), a form of organic matter derived from vegetative and urban waste, have recently been shown to be efficient sensitizers in the photo-degradation of different contaminants...
June 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28645879/risk-for-venous-thromboembolism-recurrence-among-rivaroxaban-treated-patients-who-continued-versus-discontinued-therapy-analyses-among-patients-with-vte
#2
Alok A Khorana, Jeffrey S Berger, Philip S Wells, Roger Seheult, Veronica Ashton, François Laliberté, Concetta Crivera, Dominique Lejeune, Jeff Schein, Peter Wildgoose, Patrick Lefebvre, Scott Kaatz
PURPOSE: The EINSTEIN-Extension trial showed that an extended rivaroxaban treatment significantly reduced the risk for venous thromboembolic (VTE) recurrence. The present study assessed the risk for VTE recurrence and major bleeding associated with extended rivaroxaban treatment in a clinical practice setting among patients with VTE. METHODS: A retrospective study was conducted using claims data from February 2011 to April 2015. It included adult patients who initiated rivaroxaban therapy within 7 days after their first VTE and who continuously used rivaroxaban for at least 3 months (index date: end of initial 3-month treatment)...
June 20, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28644661/soft-photon-and-graviton-theorems-in-effective-field-theory
#3
Henriette Elvang, Callum R T Jones, Stephen G Naculich
Extensions of the photon and graviton soft theorems are derived in 4D local effective field theories with massless particles of arbitrary spin. We prove that effective operators can result in new terms in the soft theorems at subleading order for photons and subsubleading order for gravitons. The new soft terms are unique, and we provide a complete classification of all local operators responsible for such modifications. We show that no local operators can modify the subleading soft graviton theorem. The soft limits are taken in a manifestly on-locus manner using a complex double deformation of the external momenta...
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
#4
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
#5
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/28644631/demonstration-of-monogamy-relations-for-einstein-podolsky-rosen-steering-in-gaussian-cluster-states
#6
Xiaowei Deng, Yu Xiang, Caixing Tian, Gerardo Adesso, Qiongyi He, Qihuang Gong, Xiaolong Su, Changde Xie, Kunchi Peng
Understanding how quantum resources can be quantified and distributed over many parties has profound applications in quantum communication. As one of the most intriguing features of quantum mechanics, Einstein-Podolsky-Rosen (EPR) steering is a useful resource for secure quantum networks. By reconstructing the covariance matrix of a continuous variable four-mode square Gaussian cluster state subject to asymmetric loss, we quantify the amount of bipartite steering with a variable number of modes per party, and verify recently introduced monogamy relations for Gaussian steerability, which establish quantitative constraints on the security of information shared among different parties...
June 9, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28642616/modulational-instability-of-coupled-ring-waveguides-with-linear-gain-and-nonlinear-loss
#7
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
https://www.readbyqxmd.com/read/28642125/safety-and-efficacy-of-dual-lead-thalamic-deep-brain-stimulation-for-patients-with-treatment-refractory-multiple-sclerosis-tremor-a-single-centre-randomised-single-blind-pilot-trial
#8
Seth F Oliveria, Ramon L Rodriguez, Dawn Bowers, Daniel Kantor, Justin D Hilliard, Erin H Monari, Bonnie M Scott, Michael S Okun, Kelly D Foote
BACKGROUND: Efficacy in previous studies of surgical treatments of refractory multiple sclerosis tremor using lesioning or deep brain stimulation (DBS) has been variable. The aim of this study was to investigate the safety and efficacy of dual-lead thalamic DBS (one targeting the ventralis intermedius-ventralis oralis posterior nucleus border [the VIM lead] and one targeting the ventralis oralis anterior-ventralis oralis posterior border [the VO lead]) for the treatment of multiple sclerosis tremor...
June 19, 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28641375/trazodone-to-change-the-risk-of-neurodegeneration-bedside-to-bench
#9
Einstein F Camargos, Otávio T Nóbrega
No abstract text is available yet for this article.
June 20, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28641056/the-odd-couple-using-biomedical-and-intersectional-approaches-to-address-health-inequities
#10
Olena Hankivsky, Lesley Doyal, Gillian Einstein, Ursula Kelly, Janet Shim, Lynn Weber, Robin Repta
BACKGROUND: Better understanding and addressing health inequities is a growing global priority. OBJECTIVE: In this paper, we contribute to the literature examining complex relationships between biological and social dimensions in the field of health inequalities. Specifically, we explore the potential of intersectionality to advance current approaches to socio-biological entwinements. DESIGN: We provide a brief overview of current approaches to combining both biological and social factors in a single study, and then investigate the contributions of an intersectional framework to such work...
January 2017: Global Health Action
https://www.readbyqxmd.com/read/28640322/effectiveness-and-safety-of-rivaroxaban-versus-warfarin-for-treatment-and-prevention-of-recurrence-of-venous-thromboembolism
#11
Craig I Coleman, Craig Coleman, Thomas J Bunz, Alexander G G Turpie
The efficacy and safety or rivaroxaban versus enoxaparin/vitamin K antagonist for treatment and prevention recurrence of venous thromboembolism (VTE) was demonstrated in the randomised EINSTEIN trials. We assessed the effectiveness and safety of rivaroxaban versus warfarin in VTE patients managed in routine practice. Using US MarketScan claims from 1/2012-6/2015, we included adults with a primary diagnosis of deep vein thrombosis (DVT) or pulmonary embolism (PE) during a hospitalisation/emergency department visit, newly-initiated on rivaroxaban or warfarin within 30-days after the VTE and with ≥180-days of continuous medical/prescription benefits prior to the VTE (baseline)...
June 22, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28623284/spatio-temporal-steering-for-testing-nonclassical-correlations-in-quantum-networks
#12
Shin-Liang Chen, Neill Lambert, Che-Ming Li, Guang-Yin Chen, Yueh-Nan Chen, Adam Miranowicz, Franco Nori
We introduce the concept of spatio-temporal steering (STS), which reduces, in special cases, to Einstein-Podolsky-Rosen steering and the recently-introduced temporal steering. We describe two measures of this effect referred to as the STS weight and robustness. We suggest that these STS measures enable a new way to assess nonclassical correlations in an open quantum network, such as quantum transport through nano-structures or excitation transfer in a complex biological system. As one of our examples, we apply STS to check nonclassical correlations among sites in a photosynthetic pigment-protein complex in the Fenna-Matthews-Olson model...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28619937/satellite-based-entanglement-distribution-over-1200-kilometers
#13
Juan Yin, Yuan Cao, Yu-Huai Li, Sheng-Kai Liao, Liang Zhang, Ji-Gang Ren, Wen-Qi Cai, Wei-Yue Liu, Bo Li, Hui Dai, Guang-Bing Li, Qi-Ming Lu, Yun-Hong Gong, Yu Xu, Shuang-Lin Li, Feng-Zhi Li, Ya-Yun Yin, Zi-Qing Jiang, Ming Li, Jian-Jun Jia, Ge Ren, Dong He, Yi-Lin Zhou, Xiao-Xiang Zhang, Na Wang, Xiang Chang, Zhen-Cai Zhu, Nai-Le Liu, Yu-Ao Chen, Chao-Yang Lu, Rong Shu, Cheng-Zhi Peng, Jian-Yu Wang, Jian-Wei Pan
Long-distance entanglement distribution is essential for both foundational tests of quantum physics and scalable quantum networks. Owing to channel loss, however, the previously achieved distance was limited to ~100 kilometers. Here we demonstrate satellite-based distribution of entangled photon pairs to two locations separated by 1203 kilometers on Earth, through two satellite-to-ground downlinks with a summed length varying from 1600 to 2400 kilometers. We observed a survival of two-photon entanglement and a violation of Bell inequality by 2...
June 16, 2017: Science
https://www.readbyqxmd.com/read/28618638/localized-dark-solitons-and-vortices-in-defocusing-media-with-spatially-inhomogeneous-nonlinearity
#14
Jianhua Zeng, Boris A Malomed
Recent studies have demonstrated that defocusing cubic nonlinearity with local strength growing from the center to the periphery faster than r^{D}, in space of dimension D with radial coordinate r, supports a vast variety of robust bright solitons. In the framework of the same model, but with a weaker spatial-growth rate ∼r^{α} with α≤D, we test here the possibility to create stable localized continuous waves (LCWs) in one-dimensional (1D) and 2D geometries, localized dark solitons (LDSs) in one dimension, and localized dark vortices (LDVs) in two dimensions, which are all realized as loosely confined states with a divergent norm...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28618549/breakdown-of-the-stokes-einstein-relation-in-pure-lennard-jones-fluids-from-gas-to-liquid-via-supercritical-states
#15
Norikazu Ohtori, Shohei Miyamoto, Yoshiki Ishii
We have examined the conditions under which the breakdown of the Stokes-Einstein (SE) relation occurs in pure Lennard-Jones (LJ) fluids over a wide range of temperatures and packing fractions beyond the critical point. To this end, the temperature and packing-fraction dependence of the self-diffusion coefficient, D, and the shear viscosity, η_{sv}, were evaluated for Xe using molecular dynamics calculations with the Green-Kubo formula. The results showed good agreement with the experimental values. The breakdown was determined in light of the SE equation which we have recently derived for pure LJ liquids: Dη_{sv}=(k_{B}T/2π)(N/V)^{1/3}, where k_{B} is the Boltzmann constant, T is the temperature, and N is the particle number included in the system volume V...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28618538/study-of-dynamic-heterogeneity-of-an-active-particle-system
#16
Huai Ding, Huijun Jiang, Zhonghuai Hou
We have studied spatial and temporal dynamic heterogeneity (DH) in a system of hard-sphere particles, subjected to active forces with constant amplitude and random direction determined by rotational diffusion with correlation time τ. We have used a variety of observables to characterize the DH behavior, including the deviation from standard Stokes-Einstein (SE) relation, a non-Gaussian parameter α_{2}(Δt) for the distribution of particle displacement within a certain time interval Δt, a four-point susceptibility χ_{4}(Δt,ΔL) for the correlation in dynamics between any two points in space separated by distance ΔL within some time window Δt, and a vector spatial-temporal correlation function S_{vec}(R,Δt) for vector displacements within time interval Δt of particle pairs originally separated by R...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28600531/bloch-oscillations-sustained-by-nonlinearity
#17
R Driben, V V Konotop, T Meier, A V Yulin
We demonstrate that nonlinearity may play a constructive role in supporting Bloch oscillations in a model which is discrete, in one dimension and continuous in the orthogonal one. The model can be experimentally realized in several fields of physics such as optics and Bose-Einstein condensates. We demonstrate that designing an optimal relation between the nonlinearity and the linear gradient strength provides extremely long-lived Bloch oscillations with little degradation. Such robust oscillations can be observed for a broad range of parameters and even for moderate nonlinearities and large enough values of linear potential...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28598673/entangled-dynamics-in-macroscopic-quantum-tunneling-of-bose-einstein-condensates
#18
Diego A Alcala, Joseph A Glick, Lincoln D Carr
Tunneling of a quasibound state is a nonsmooth process in the entangled many-body case. Using time-evolving block decimation, we show that repulsive (attractive) interactions speed up (slow down) tunneling. While the escape time scales exponentially with small interactions, the maximization time of the von Neumann entanglement entropy between the remaining quasibound and escaped atoms scales quadratically. Stronger interactions require higher-order corrections. Entanglement entropy is maximized when about half the atoms have escaped...
May 26, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28598671/quasiparticle-energy-in-a-strongly-interacting-homogeneous-bose-einstein-condensate
#19
Raphael Lopes, Christoph Eigen, Adam Barker, Konrad G H Viebahn, Martin Robert-de-Saint-Vincent, Nir Navon, Zoran Hadzibabic, Robert P Smith
Using two-photon Bragg spectroscopy, we study the energy of particlelike excitations in a strongly interacting homogeneous Bose-Einstein condensate, and observe dramatic deviations from Bogoliubov theory. In particular, at large scattering length a the shift of the excitation resonance from the free-particle energy changes sign from positive to negative. For an excitation with wave number q, this sign change occurs at a≈4/(πq), in agreement with the Feynman energy relation and the static structure factor expressed in terms of the two-body contact...
May 26, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28598444/pumping-approximately-integrable-systems
#20
Florian Lange, Zala Lenarčič, Achim Rosch
Weak perturbations can drive an interacting many-particle system far from its initial equilibrium state if one is able to pump into degrees of freedom approximately protected by conservation laws. This concept has for example been used to realize Bose-Einstein condensates of photons, magnons and excitons. Integrable quantum systems, like the one-dimensional Heisenberg model, are characterized by an infinite set of conservation laws. Here, we develop a theory of weakly driven integrable systems and show that pumping can induce large spin or heat currents even in the presence of integrability breaking perturbations, since it activates local and quasi-local approximate conserved quantities...
June 9, 2017: Nature Communications
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