Search results for "Note"

Progress in HAXPES performance combining full-field k-imaging with time-of-flight recording

2019

Journal of synchrotron radiation 26(6), 1996-2012 (2019). doi:10.1107/S1600577519012773

Unlocking mixed oxides with unprecedented stoichiometries from heterometallic metalorganic frameworks for the catalytic hydrogenation of CO 2

2021

[EN] Their complex surface chemistry and high oxygen lattice mobilities place mixed-metal oxides among the most important families of materials. Modulation of stoichiometry in mixed-metal oxides has been shown to be a very powerful tool for tuning optical and catalytic properties. However, accessing different stoichiometries is not always synthetically possible. Here, we show that the thermal decomposition of the recently reported metal-organic framework MUV-101(Fe, Ti) results in the formation of carbon-supported titanomaghemite nanoparticles with an unprecedented Fe/Ti ratio close to 2, not achievable by soft-chemistry routes. The resulting titanomaghemite phase displays outstanding catal…

Conservazione dei titoli. Trascrizione e restituzione della nota

2010

Calcium mediated polyelectrolyte adsorption on like-charged surfaces.

2011

International audience; Monte Carlo simulations within the primitive model of calcium-mediated adsorption of linear and comb polyelectrolytes onto like-charged surfaces are described, focusing on the effect of calcium and polyion concentrations as well as on the ion pairing between polymers and calcium ions. We use a combination of Monte Carlo simulations and experimental data from titration and calcium binding to quantify the ion pairing. The polymer adsorption is shown to occur as a result of surface overcharging by Ca2+ and ion pairing between charged monomers and Ca2+. In agreement with experimental observations, the simulations predict that the polymer adsorption isotherm goes through …

Voltammetric Detection of Lead(II) Using Amide-Cyclam- Functionalized Silica-Modified Carbon Paste Electrodes

2009

2-(4,8,11-Triscarbamoylmethyl-1,4,8,11-tetraazacyclotetradec-1-yl)acetamide (TETAM) derivatives bearing 1, 2, or 4 silylated arms have been synthesized and grafted to the surface of silica gel and ordered mesoporous silica samples. The resulting organic-inorganic hybrids have been incorporated into carbon paste electrodes and applied to the preconcentration electroanalysis of Pb(II). The attractive recognition properties of these cyclam derivatives functionalized with amide pendent groups toward Pb(II) species and the highly porous structure of the adsorbents can be exploited for the selective and sensitive detection of the target analyte. Various parameters affecting the preconcentration a…

Dirakův kužel a pseudogapped hustota stavů v topologické polovině Heuslerovy sloučeniny YPtBi

2016

Topologické izolátory (Tis) jsou zajímavé materiály, které vykazují nebývalé vlastnosti. . Zde jsme prozkoumali sloučeniny YPtBi jako příklad ze třídy polovu-Heuslerových materiálů. Topological insulators (TIs) are exciting materials, which exhibit unprecedented properties, such as helical spinmomentum locking, which leads to large torques for magnetic switching and highly efficient spin current detection. Here we explore the compound YPtBi, an example from the class of half-Heusler materials, for which the typical band inversion of topological insulators was predicted. We prepared this material as thin films by conventional cosputtering from elementary targets. By in situ time-of-flight mo…

Crystal structure of trans-di­chlorido­(4-nitro­aniline-κN 1)(piperidine-κN)platinum(II)

2015

The packing of the title compound features N—H⋯Cl hydrogen bonds and π–π stacking inter­actions, which form one-dimensional chains of mol­ecules parallel to [001] further linked via N—H⋯O inter­actions.

Tiesiskā nenoteiktība transfertcenu jautājumos

2018

Transfertcenu, kā darījuma cenas starp saistītajiem uzņēmumiem, regulējums kļūst arvien aktuālāks, attīstoties globālai ekonomikai un organizējot darbību, izmantojot starptautiskās uzņēmumu grupas ar atšķirīgu nodokļu regulējumu katrā no jurisdikcijām. Bakalaura darbā ir analizēta transfertcenas noteikšanas starptautiskā un Latvijas nacionālā regulējuma mijiedarbība, kā arī tā pietiekamība jautājuma risināšanai. Bakalaura darba mērķis ir izpētīt piemērojamo starptautisko un Latvijas regulējumu transfertcenas noteikšanā, tā evolūciju pēdējo gadu laikā saistībā ar ESAO un valsts atbalsta lēmumiem, strīdu rašanās pamatus un iespējamos risināšanas veidus, kā arī apkopojot rezultātus, izteikt sv…

Parametric sensitivity of a CFD model concerning the hydrodynamics of trickle-bed reactor (TBR)

2016

Abstract The aim of the present study was to investigate the sensitivity of a multiphase Eulerian CFD model with respect to relations defining drag forces between phases. The mean relative error as well as standard deviation of experimental and computed values of pressure gradient and average liquid holdup were used as validation criteria of the model. Comparative basis for simulations was our own data-base obtained in experiments carried out in a TBR operating at a co-current downward gas and liquid flow. Estimated errors showed that the classical equations of Attou et al. (1999) defining the friction factors Fjk approximate experimental values of hydrodynamic parameters with the best agre…

Maznodrošinātas ģimenes (personas) tiesiskais statuss un ar to saistītie problemātiskie aspekti

2021

Maģistra darbā „Maznodrošinātas ģimenes (personas) tiesiskais statuss un ar to saistītie problemātiskie aspekti” darba autore aplūko un izvērtē ar maznodrošinātas ģimenes (personas) tiesiskā statusa institūtu saistītos teorētiskos un praktiskos jautājumus, fokusējoties uz maznodrošinātas ģimenes (personas) tiesiskā statusa iegūšanas pamatkritēriju un papildkritēriju izšķiršanas un izvērtēšanas jautājumiem, kā arī maģistra darba izpētes tematu saistītiem problēmjautājumiem. Darba I nodaļā autore aplūko un izvērtē maznodrošinātas ģimenes (personas) sociāli - tiesiskajā statusā ietvertos teorētiskos jautājumus, noskaidrojot maznodrošinātas ģimenes (personas) vispārējo tiesisko būtību – vietu, …