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315. Silica-coated ▫$Bi2_Se_3$▫ topological insulator nanoparticles: preserving their optical properties and make them biocompatible : preserving their optical properties and make them biocompatibleBlaž Belec, Nina Kostevšek, Giulia Della Pelle, Sebastjan Nemec, Slavko Kralj, Martina Bergant Marušič, Sandra Gardonio, Mattia Fanetti, Matjaž Valant, 2023, published scientific conference contribution abstract Keywords: topological insulator, bismuth selenide, photo-thermal material, biocompatibility, nanoparticles
Published in RUNG: 19.10.2023; Views: 752; Downloads: 3
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316. Ferrite-based magnets by high pressure consolidationCesár De Julián Fernández, Blaž Belec, Aleksander Učakar, Petra Jenuš, 2023, published scientific conference contribution abstract Abstract: M-type hexaferrite magnets constitute together the rare-earth magnets the most employed magnets in the
world. Even if ferrite magnets have smaller energy product and lower magnetization saturation than rare-earth
permanent magnets (PMs), currently ferrite magnets represent the most widely used PMs, covering 80% of the
PM market production [1,2]. Recently, a strong effort is being performed to improve the magnetic properties
of ferrites with the scope of substituting partially rare-earth magnets. Most of the strategies involve the
nanostructuration of the ferrites and/or the development of hybrid compounds [3]. A bottleneck for the
production of these magnets is that standard sintering process requires high temperatures and oxidizing
atmosphere that produces the destruction of the nanostructure and several chemical changes. Different novel
strategies as out-of-equilibrium or cold sintering processes are mainly considered[2,4].
In our presentation we will show the production of dense ferrite-based magnets by high pressure multi-Anvil
press at low temperatures. This press applies quasi-isotropic pressures in the range up to 20 GPa and
temperatures up to 1200°C. We demonstrate that the consolidation of micrometric hexaferrite (SrFe12O19)
powders is possible at temperatures below 1000°C, below the standard sintering temperatures. In addition,
dense hybrid magnets were obtained composed of micrometric hexaferrites and soft high magnetization metal
Fe or FeCo NPs applying pressures up to 6 GPa and low temperatures (250°C). A deep study, including
structural, morphological and magnetic characterizations, has been performed to determine the influence of the
temperature and pressure consolidation conditions in the properties of these novel magnets. Magnetic
characterizations show that hybrid magnets exhibit larger magnetization than ferrites and single step hysteresis
loops. Single Point Detection characterizations indicate that the anisotropy field of the hybrid magnets is similar
to that of the ferrite magnets. These results suggest that the two moieties componing the high pressure
consolidated magnets have similar properties than the original micro and nano powders, but they are magnetic
coupled during the reversal process. High pressure consolidation appears as a promising technique to obtain
nano-based metal-oxide hybrid magnets with promising hard properties.
Keywords: ferrite magnets, high pressure consolidation, low temperatures
Published in RUNG: 19.10.2023; Views: 755; Downloads: 5
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317. Modelling water for calorimetry of proteinsKnarik Yeritsyan, Artem Badasyan, 2023, published scientific conference contribution abstract Abstract: Differential Scanning Calorimetry (DSC) is a powerful technique used to study the thermal stability and unfolding of proteins. DSC provides the excess heat capacity profile and is used to study the thermodynamics of a given protein. By fitting DSC data to the model, researchers can obtain valuable information about the thermodynamics of protein folding and unfolding, which can help them better understand protein structure, stability, and function.
Based on Hamiltonian representation of ZB model and using the solvent effects we derived an expression for heat capacity in proteins and successfuly fit it to experimental data. As we show, our model provides a better fit to experimental data, as compared to the 2-state model. The model we propose takes into account also water effects and we show that it fits better to experimental data giving inter- and intra-molecular H-bonding energies instead of reporting only one total enthalpy.
Keywords: Zimm-Bragg model, water model, helix-coil transition, protein folding, differential scanning calorimetry
Published in RUNG: 18.10.2023; Views: 704; Downloads: 0
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318. AugerPrime surface detector electronicsA. Abdul Halim, Andrej Filipčič, Jon Paul Lundquist, Shima Ujjani Shivashankara, Samo Stanič, Serguei Vorobiov, Danilo Zavrtanik, Marko Zavrtanik, 2023, original scientific article Abstract: Operating since 2004, the Pierre Auger Observatory has led to major advances in our
understanding of the ultra-high-energy cosmic rays. The latest findings have revealed new insights that led to the upgrade of the Observatory, with the primary goal of obtaining information on the primary mass of the most energetic cosmic rays on a shower-by-shower basis. In the framework of the upgrade, called AugerPrime, the 1660 water-Cherenkov detectors of the surface array are equipped with plastic scintillators and radio antennas, allowing us to enhance the composition sensitivity. To accommodate new detectors and to increase experimental capabilities, the electronics
is also upgraded. This includes better timing with up-to-date GPS receivers, higher sampling
frequency, increased dynamic range, and more powerful local processing of the data. In this paper, the design characteristics of the new electronics and the enhanced dynamic range will be described. The manufacturing and test processes will be outlined and the test results will be discussed. The calibration of the SD detector and various performance parameters obtained from the analysis of the first commissioning data will also be presented.
Keywords: ultra-high-energy cosmic rays, Pierre Auger Observatory, AugerPrime detector upgrade, surface detector array, surface detector electronics
Published in RUNG: 18.10.2023; Views: 708; Downloads: 5
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319. Biological applications of synthetic binders isolated from a conceptually new adhiron libraryClaudia D'Ercole, Matteo De March, Gianluca Veggiani, Sandra Oloketuyi, Rossella Svigelj, Ario De Marco, 2023, original scientific article Keywords: synthetic library, adhirons, affimers, C-reactive protein, SpyCatcher
Published in RUNG: 17.10.2023; Views: 701; Downloads: 3
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320. CircumfixationFranc MarušičAbstract: Circumfixation is a morphological operation as a result of which an affix appears to surround or circumscribe the stem. There are three possible arrangements of the affixal element and the stem in which the stem is circumscribed by the affix: a single affix can appear simultaneously on both sides of the stem, which is what I call a monomorphic circumfix, two independent affixes can be placed each on a different side of the stem, or else an affix could be alternating between a suffix and a prefix, by which it would in a sense also circumscribe the stem, it just would not do so simultaneously. The last‐mentioned option results in mobile affixes, which are covered in more detail in ‘Metathesis’ in this volume. This entry goes over various possible attestations of these three patterns and argues the only possible type of circumfixes are bimorphic circumfixes. It further claims that even the bimorphic circumfixes are (most likely) bimorphemic. Theoretical and processing reasons are presented that favour this restriction.
Keywords: circumfixation, discontinuous affixation, morphology
Published in RUNG: 17.10.2023; Views: 583; Downloads: 0
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