Search results for "ELE"

Comparative theoretical study of the Ag–MgO (100) and (110) interfaces

1999

We have calculated the atomic and electronic structures of Ag–MgO(100) and (110) interfaces using a periodic (slab) model and an ab initio Hartree–Fock approach with a posteriori electron correlation corrections. The electronic structure information includes interatomic bond populations, effective charges, and multipole moments of ions. This information is analyzed in conjunction with the interface binding energy and the equilibrium distances for both interfaces for various coverages. There are significant differences between partly covered surfaces and surfaces with several layers of metal, and these can be understood in terms of electrostatics and the electron density changes. For complet…

Three-dimensional crystallization of the light-harvesting complex from Mantoniella squamata (Prasinophyceae) requires an adequate purification proced…

1995

Abstract We present a new purification procedure for the light-harvesting complex of Mantoniella squamata whereupon three-dimensional crystallization succeeded. Previous purification methods were based on density centrifugations as the only separating principle. We have extended this preparation procedure by applying anion-exchange and molecular-sieve chromatography techniques. Purity and stability of the complex were proved by denaturing and non-denaturing polyacrylamide-gel electrophoresis, and spectroscopic measurements. With respect to contaminating lipids the purified pigment-protein complex was examined by thin-layer chromatography and the aggregation and/or oligomeric states were inv…

Integrative analysis of the mineralogical and chemical composition of modern microbialites from ten Mexican lakes: What do we learn about their forma…

2021

International audience; Interpreting the environmental conditions under which ancient microbialites formed relies upon comparisons with modern analogues. This is why we need a detailed reference framework relating the chemical and mineralogical compositions of modern microbialites to the physical and chemical parameters prevailing in the environments where they form. Here, we measured the chemical, including major and trace elements, and mineralogical composition of microbialites from ten Mexican lakes as well as the chemical composition of the surrounding waters. Saturation states of lakes with different mineral phases were systematically determined and correlations between solution and so…

CCDC 225461: Experimental Crystal Structure Determination

2004

Related Article: M.G.Basallote, F.Estevan, M.Feliz, M.J.Fernandez-Trujillo, D.A.Hoyos, R.Llusar, S.Uriel, C.Vicent|2004|Dalton Trans.||530|doi:10.1039/b315841a

Evaluating the Utilization of Innovative Electrochemical Methodologies for the Real Wastewater Treatment

2021

Pacientu aprūpe ar skeleta ekstenzijām

2016

Bakalaura darba tēma ir “Pacientu aprūpe ar skeleta ekstenzijām”. Pētījums tika veikts vienā no Rīgas X pilsētas klīnikām, laika posmā no 28.04.2016 līdz 12.05.2016. Pirms tam tika saņemta slimnīcas valdes priekšsēdētāja rakstiska piekrišana veikt pētījumu viņa vadītajā klīnikā. Bakalaura darba pētījuma mērķis ir izvērtēt pacientu, ar skeleta ekstenziju, aprūpi. Pētniecības jautājums – Kāda ir aprūpe pacientiem ar skeleta ekstenzijām? Darba pētnieciskajā daļā izmantota kvalitatīvā pētniecības metode – intervija. Pētījumā piedalījās astoņi respondenti – praktizējošās māsas, kuras strādā traumatoloģijas nodaļā. Pētījuma bāze – Rīgas X klīnikas traumatoloģijas nodaļas. Pamatojoties uz pētījuma…

Remnants of Anderson localization in prethermalization induced by white noise

2017

We study the non-equilibrium evolution of a one-dimensional quantum Ising chain with spatially disordered, time-dependent, transverse fields characterised by white noise correlation dynamics. We establish pre-thermalization in this model, showing that the quench dynamics of the on-site transverse magnetisation first approaches a metastable state unaffected by noise fluctuations, and then relaxes exponentially fast towards an infinite temperature state as a result of the noise. We also consider energy transport in the model, starting from an inhomogeneous state with two domain walls which separate regions characterised by spins with opposite transverse magnetization. We observe at intermedia…

Vacancy-like Dressed States in Topological Waveguide QED

2020

We identify a class of dressed atom-photon states formingat the same energy of the atom at any coupling strength. As a hallmark, their photonic component is an eigenstate of the bare photonic bath with a vacancy in place of the atom. The picture accommodates waveguide-QED phenomena where atoms behave as perfect mirrors, connecting in particular dressed bound states (BS) in the continuum or BIC with geometrically-confined photonic modes. When applied to photonic lattices, the framework provides a general criterion to predict dressed BS in lattices with topological properties by putting them in one-to-one correspondence with photonic BS. New classes of dressed BS are thus predicted in the pho…

Entanglement entropy in a periodically driven quantum Ising chain

2016

We numerically study the dynamics of entanglement entropy, induced by an oscillating time periodic driving of the transverse field, h(t), of a one-dimensional quantum Ising chain. We consider several realizations of h(t), and we find a number of results in analogy with entanglement entropy dynamics induced by a sudden quantum quench. After short-time relaxation, the dynamics of entanglement entropy synchronises with h(t), displaying an oscillatory behaviour at the frequency of the driving. Synchronisation in the dynamics of entanglement entropy, is spoiled by the appearance of quasi-revivals which fade out in the thermodynamic limit, and which we interpret using a quasi-particle picture ada…

Colloquium: Nonequilibrium effects in superconductors with a spin-splitting field

2018

This Colloquium discusses the recent progress in understanding the properties of spin-split superconductors under nonequilibrium conditions. Recent experiments and theories demonstrate a rich variety of transport phenomena occurring in devices based on such materials that suggest direct applications in thermoelectricity, low-dissipative spintronics, radiation detection, and sensing. This text discusses different experimental situations and presents a theoretical framework based on quantum kinetic equations. This framework provides an accurate description of the nonequilibrium distribution of charge, spin, and energy, which are the relevant nonequilibrium modes, in different hybrid structure…