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Artykuły w czasopismach na temat "Electron-ion interaction potential"

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Thapa, S. R. B. "Many Body Interactions and Lattice Dynamics of Gold." Himalayan Physics 1 (July 28, 2011): 44–47. http://dx.doi.org/10.3126/hj.v1i0.5176.

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Lattice dynamics of gold is studied theoretically using phenomenological model. This model considers (i ion-ion and (ii) ionelectron interactions to evaluate the potential energy. Contribution to ion-ion interaction is the sum of two body central interactions between ions and many body interactions among ions. Contribution to potential energy due to ion-electron interactions is evaluated using screened coulomb potential. Using this model phonon frequencies of gold are computed at 48 non-equivalent points of Brillouin zones of crystal and compared with experimental points. Lattice specific heat
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Eliasson, B., and P. K. Shukla. "The dynamics of electron and ion holes in a collisionless plasma." Nonlinear Processes in Geophysics 12, no. 2 (2005): 269–89. http://dx.doi.org/10.5194/npg-12-269-2005.

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Abstract. We present a review of recent analytical and numerical studies of the dynamics of electron and ion holes in a collisionless plasma. The new results are based on the class of analytic solutions which were found by Schamel more than three decades ago, and which here work as initial conditions to numerical simulations of the dynamics of ion and electron holes and their interaction with radiation and the background plasma. Our analytic and numerical studies reveal that ion holes in an electron-ion plasma can trap Langmuir waves, due the local electron density depletion associated with th
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Gross, W. J., D. Vasileska, and D. K. Ferry. "3D Simulations of Ultra-small MOSFETs with Real-space Treatment of the Electron – Electron and Electron-ion Interactions." VLSI Design 10, no. 4 (2000): 437–52. http://dx.doi.org/10.1155/2000/48474.

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We present a 3D Ensemble Monte Carlo particle-based simulator with a novel realspace treatment of the short-range electron – electron and electron-ion interactions. By using a corrected Coulomb force in conjunction with a proper cutoff range, the shortrange portion of the force is properly accounted for, and the ‘double counting’ of the long-range interaction is eliminated. The proposed method naturally incorporates the multi-ion contributions, local distortions in the scattering potential due to the movement of the free charges, and carrier-density fluctuations. The doping dependence of the l
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Markovych, B. "Investigation of effective potential of electron-ion interaction in semibounded metal." Mathematical Modeling and Computing 5, no. 2 (2018): 184–92. http://dx.doi.org/10.23939/mmc2018.02.184.

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Zhang, Zeqi, Ravindra T. Desai, Yohei Miyake, Hideyuki Usui, and Oleg Shebanits. "Particle-in-cell simulations of the Cassini spacecraft’s interaction with Saturn’s ionosphere during the Grand Finale." Monthly Notices of the Royal Astronomical Society 504, no. 1 (2021): 964–73. http://dx.doi.org/10.1093/mnras/stab750.

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ABSTRACT A surprising and unexpected phenomenon observed during Cassini’s Grand Finale was the spacecraft charging to positive potentials in Saturn’s ionosphere. Here, the ionospheric plasma was depleted of free electrons with negatively charged ions and dust accumulating up to over 95 per cent of the negative charge density. To further understand the spacecraft–plasma interaction, we perform a three-dimensional Particle-In-Cell study of a model Cassini spacecraft immersed in plasma representative of Saturn’s ionosphere. The simulations reveal complex interaction features such as electron wing
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Rymzhanov, R. A. "ELECTRON KINETICS OF YTTRIUM IRON GARNET AFTER SWIFT HEAVY ION IMPACT." Eurasian Physical Technical Journal 19, no. 3 (41) (2022): 23–28. http://dx.doi.org/10.31489/2022no3/23-28.

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The TREKIS Monte-Carlo model was applied to study the temporal electronic kinetics of yttrium iron garnet after a swift heavy ion impact. Cross sections of incident particles interaction with the target were determined within complex dielectric function-dynamic structure factor formalism. We found two modes of the spatial propagation of electronic excitation: fast delta-electrons form a front of the excitation while electrons produced due to decay of plasmons generated in a track form the second front slowly following behind the first one.Analysis of mechanisms of target lattice heating pointe
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Burguera, Sergi, Rosa M. Gomila, Antonio Bauzá, and Antonio Frontera. "Square Planar Pt(II) Ion as Electron Donor in Pnictogen Bonding Interactions." Inorganics 11, no. 2 (2023): 80. http://dx.doi.org/10.3390/inorganics11020080.

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It has been proposed that late transition metals with low coordination numbers (square planar or linear) can act as nucleophiles and participate in σ-hole interactions as electron donors. This is due to the existence, in this type of metal complexes, of a pair of electrons located at high energy d-orbitals (dz2 or dx2-y2), which are adequate for interacting with antibonding σ-orbitals [σ*(X–Y)] where Y is usually an electron withdrawing element and X an element of the p-block. This type of d[M]→σ*(X–Y) interaction has been reported for metals of groups 9–11 in oxidation states +1 and +2 (d8 an
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Prönnecke, S., A. Caro, M. Victoria, T. Diaz de la Rubia, and M. W. Guinan. "The effect of electronic energy loss on the dynamics of thermal spikes in Cu." Journal of Materials Research 6, no. 3 (1991): 483–91. http://dx.doi.org/10.1557/jmr.1991.0483.

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We present results of a molecular dynamics simulation study of the effect of electron-ion interactions on the dynamics of the thermal spike in Cu. Interatomic forces are described with a modified embedded atom method potential. We show that the electron-ion interaction acts to reduce the lifetime of the thermal spike and therefore the amount of atomic rearrangement that takes place in energetic displacement cascades in Cu. The results point toward the important effect that inelastic energy losses might have on the dynamics of displacement cascades in the subcascade energy regime where the life
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Clark, William, Chris H. Greene, and Gregory Miecznik. "Anisotropic interaction potential between a Rydberg electron and an open-shell ion." Physical Review A 53, no. 4 (1996): 2248–61. http://dx.doi.org/10.1103/physreva.53.2248.

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ROY, SUBRATA, and B. P. PANDEY. "Plasma–wall interaction inside a Hall thruster." Journal of Plasma Physics 68, no. 4 (2002): 305–19. http://dx.doi.org/10.1017/s0022377802002027.

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The dynamics of a Hall thruster is investigated numerically in the presence of a plasma–wall interaction. The plasma–wall interaction is a function of the wall potential, which in turn is determined by the secondary electron emission and sputtering yield. In the present work, the effect of secondary electron emission and sputter yield have been considered simultaneously. Owing to disparate temporal scales, ions and neutrals have been described by a set of time-dependent equations while electrons are considered in a steady state. Based on the experimental observations, a third-order polynomial
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Rozprawy doktorskie na temat "Electron-ion interaction potential"

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Pokapanich, Wandared. "Solvent–Solute Interaction : Studied by Synchrotron Radiation Based Photo and Auger Electron Spectroscopies." Doctoral thesis, Uppsala universitet, Yt- och gränsskiktsvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-138749.

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Aqueous solutions were studied using photoelectron and Auger spectroscopy, based on synchrotron radiation and a liquid micro-jet setup. By varying the photon energy in photoelectron spectra, we depth profiled an aqueous tetrabutylammonium iodide (TBAI) solution. Assuming uniform angular emission from the core levels, we found that the TBA+ ions were oriented at the surface with the hydrophobic butyl arms sticking into the liquid. We investigated the association between ions and their neighbors in aqueous solutions by studying the electronic decay after core ionization. The (2p)−1 decay of solv
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Książki na temat "Electron-ion interaction potential"

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Horing, Norman J. Morgenstern. Interacting Electron–Hole–Phonon System. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198791942.003.0011.

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Chapter 11 employs variational differential techniques and the Schwinger Action Principle to derive coupled-field Green’s function equations for a multi-component system, modeled as an interacting electron-hole-phonon system. The coupled Fermion Green’s function equations involve five interactions (electron-electron, hole-hole, electron-hole, electron-phonon, and hole-phonon). Starting with quantum Hamilton equations of motion for the various electron/hole creation/annihilation operators and their nonequilibrium average/expectation values, variational differentiation with respect to particle s
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Części książek na temat "Electron-ion interaction potential"

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Takabe, Hideaki. "Theoretical Model of Dense Plasmas." In Springer Series in Plasma Science and Technology. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-45473-8_8.

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AbstractIn the dawn of quantum mechanics, scientists had challenged to formulate the equation of many-electron system, such as atom and solid matter, just after the success of Schrodinger equation to explain a hydrogen atom. It is found, however, that a system of multi-electron requires the self-consistent treatment of exchange interaction stemming from Pauli exclusive principle.In 1930s, Hartree and Fock has derived the equation with use of Slater determinant. It is called Hartree-Fock (HF) equation. This is the equation for many-electron system and if we can solve it, almost exact solution i
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Takabe, Hideaki. "Atomic Process in Plasmas." In Springer Series in Plasma Science and Technology. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-45473-8_5.

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AbstractWhen a high-intensity laser is irradiated onto a solid gold (Z = 79), half of the electrons is partially ionized. The multi-electron structure of such ions is not obvious. Quantum mechanics of multi-electron systems and calculations of ionization statistics are required. In this chapter, the electrons in the ion are approximated to be bound in a spherically symmetric mean field, and the isolated atom is studied.The Hartree-Hock (HF) equation, which accurately describes atoms in many-electron systems, can be solved, but it is a daunting task. For this purpose, simple but error-prone app
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Ali, Shahid, and Yas Al-Hadeethi. "Plasma Diagnostic Methods: Test Charge Response in Lorentzian Dusty Plasmas." In Selected Topics in Plasma Physics. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.92460.

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Different plasma diagnostic methods are briefly discussed, and the framework of a test charge technique is effectively used as diagnostic tool for investigating interaction potentials in Lorentzian plasma, whose constituents are the superthermal electrons and ions with negatively charged dust grains. Applying the space-time Fourier transformations to the linearized coupled Vlasov-Poisson equations, a test charge potential is derived with a modified response function due to energetic ions and electrons. For a test charge moving much slower than the dust-thermal speed, there appears a short-rang
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Katayama, lchiro. "Atomic physics with cyclotron beams." In Nucleon—Hadron Many-Body Systems. Oxford University PressOxford, 1999. http://dx.doi.org/10.1093/oso/9780198519003.003.0009.

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Abstract Why atomic physics at a cyclotron laboratory? ‘The interaction is very clear, so what is left for study?’ —this is often what I was asked when we started atomic collision studies at RCNP. I hope this report provides some answers to the question. Firstly, I would like to remark on the so-called ‘Massey criterion’, which states that between a projectile and an electron, in a certain orbit in a target atom, the strongest interaction is expected when the velocities match each other. As the velocity of a K-shell electron in Pb atom equals that of a 160 MeV proton, this implies that, in ord
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Bransden, B. H., and M. R. C. McDowell. "Inelastic Ion-Atom Collisions - Coupled Channel Models." In Charge Exchange and the Theory of Ion-Atom Collisions. Oxford University PressOxford, 1992. http://dx.doi.org/10.1093/oso/9780198520207.003.0003.

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Abstract In this chapter we shall begin to develop the quantum theory of inelastic ion atom collisions. In order to discuss the basic concepts without inessential complication, the theory will be developed for a simple system composed of a single electron and two inert singly charged ions A+ and B +. This will allow us to discuss charge exchange reactions like H+ + H( 1s) -+ H(n/m) + H + and H + + Li0 -+ H(n/m) + Li+ where, in the second example, Li+ is treated as an inert core interacting with the electron through an effective potential. The restriction to singly charged cores and one-electro
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Hernández-Esquivel, Rosa-Alejandra, Gabriela Navarro-Tovar, Elvia Zárate-Hernández, and Patricia Aguirre-Bañuelos. "Solid Lipid Nanoparticles (SLN)." In Nanocomposite Materials for Biomedical and Energy Storage Applications. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102536.

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Solid lipid nanoparticles (SLN) are nanocarriers in the 10–1000 nm range of a solid core, containing both hydrophilic and hydrophobic active pharmaceutical ingredients. SLNs are composed of well-tolerated and biodegradable solid lipids such as mono-, di-, and triglycerides, fatty acids, waxes, and steroids, as well as lipophilic and hydrophilic emulsifying agents. This composition of biocompatible molecules makes SLNs one of the most successful options for the administration of drugs with different routes of administration. To determine its size, morphology, and surface charge, laser diffracti
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B, Guru Prasad. "MECHANISM AND ANN MODELING OF SULFATE-INDUCED HEAVE IN NON-SWELLING SOIL IN AN ACIDIC ENVIRONMENT." In Futuristic Trends in Construction Materials & Civil Engineering Volume 3 Book 5. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bjce5p2ch1.

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Red earth (aluminosilicate) is mainly comprised of kaolinite mineral, which is of non-swelling in nature. The iron oxides present in the soil impart red colour to the earth, hence it is named red earth. In the case of natural 1:1 minerals, no significant volume changes are observed due to strong hydrogen bonding between their interlayers. Sulfate in an acidic environment can cause abnormal volume changes in natural red earth, owing to mineralogical alterations. Sulfuric acid solutions of varying concentrations are used to induce sulfate content in an acidic environment, which is a very common
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Tirado-Miranda, M., J. Ramos, O. Sanz, et al. "Experimental Techniques Used for the Characterization of Soft Nanoparticles." In Soft Nanoparticles for Biomedical Applications, 2nd ed. Royal Society of Chemistry, 2025. https://doi.org/10.1039/9781837675203-00022.

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This chapter is devoted to current techniques for the characterization of soft nanoparticles. Taking into account the interest of potential readers, i.e., people mainly working in Biomedical Sciences, only those techniques were selected that assess the most fundamental properties of single nanoparticles such as their size, shape, surface charge density or internal structure. All these parameters are relevant for interparticle forces, interactions with other particles or living cells, their capability to encapsulate drugs or the possibility of crossing cellular membranes, among others. For size
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Kumar Jha, Ashok, Shankar Kumar, and Tinku Kumar. "ELASTIC SCATTERING AND ELECTRON CAPTURE PROCESSES IN COLLISIONS OF 3HE2+ ION WITH CO MOLECULE BELOW 5 KEV." In Futuristic Trends in Chemical Material Sciences & Nano Technology Volume 3 Book 8. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3becs8p4ch4.

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Theoretical investigations have been executed on the process of single electron capture occurring in collisions between 3He2+ ions and CO molecules. Semiclassical collision methods were employed in this study, where adiabatic potentials and nonadiabatic couplings were derived using the multireference single- and double-excitation configuration-interaction (MRDCI) approach. Cross sections for single electron capture, both partial and total, were computed over a range of energies from 0.6 to 6 keV. The calculated results demonstrate a notable sensitivity to molecular configuration, emphasizing a
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UZİLDAY, Barış. "Türkiye Ekstremofitlerinde Çevresel Streslere Uyum Mekanizmaları: Schrenkiella parvula Örneği." In Ege Bölgesinde Sucul ve Karasal Ekosistemlerde Flora-Fauna Biyoçeşitliliği. TÜRKİYE BİLİMLER AKADEMİSİ, 2025. https://doi.org/10.53478/tuba.978-625-6110-33-5.ch11.

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"Turkey, with its geographical location and diverse climate zones, hosts a rich variety of plant species. A notable example of this diversity is Schrenkiella parvula, an extremophile plant (extremophyte) from the Brassicaceae family that thrives in the saline soils around Lake Tuz and is highly resistant to extreme conditions. In recent years, this species has been used as a model organism in genetic studies aimed at understanding stress tolerance mechanisms. The sequencing of S. parvula’s genome and its comparison with those of stress-sensitive species have revealed various adaptive mechanism
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Streszczenia konferencji na temat "Electron-ion interaction potential"

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Shibahara, Masahiko, Shin-Ichi Satake, and Jun Taniguchi. "Quantum Molecular Dynamics Study on Energy Transfer to the Secondary Electron in Surface Collision Process of an Ion." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32144.

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It is well known that an emission of secondary electrons is observed in an ion collision process to a surface, such as the focused ion beam (FIB) process. However, the physical effect of secondary electron emission to energy and mass transfer is seldom considered and there are few examples of analysis of the secondary electron emission. It is one of interesting problems as an extreme small scale energy transfer problem how energy is transferred to the electron emitted from the surface by ionic collisions. In the present study the quantum molecular dynamics method was applied to an energy trans
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Becker, W., R. R. Schlicher, and M. O. Scully. "Final State Effects in Above-Threshold Ionization." In Multiple Excitations of Atoms. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/mea.1986.tuc4.

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With the goal in mind to separate final state effects due to the interaction of the ejected electron with the laser field from dynamical effects associated with the process of ionization, we investigate the following simple model: We assume an effective interaction that just lifts the electron into the continuum via absorption of the minimum number N of photons which is necessary to overcome the ionization potential (defined in the absence of the field). The effective interaction is left unspecified except its matrix element is assumed to be proportional to IN/2 with I the intensity of the las
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Al-Za’Al, Mohammad, Harold C. Miller, and John W. Farley. "High resolution spectroscopic studies of the negative molecular ion NH− using a color-center laser." In OSA Annual Meeting. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.tul4.

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We have performed high-resolution spectroscopic measurements on the negative molecular ion NH−. The infrared beam of a Burleigh FCL-20 color-center laser overlaps a parallel mass-selected 3-keV ion beam and induces vibrational–rotational transitions. The laser-excited ionic state autodetaches, yielding a fast (keV) collinear neutral NH, which is detected by secondary electron emission. Resonances are observed by scanning the ion velocity with fixed laser frequency. Our results more than quadruple the number of high-precision measurements in this system. Our results include the important Q and
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Al-Za’Al, Mohammad, Harold C. Miller, and John W. Farley. "High resolution spectroscopic studies of the negative molecular ion NH− using a color-center laser." In International Laser Science Conference. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/ils.1986.tul4.

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We have performed high-resolution spectroscopic measurements on the negative molecular ion NH−. The infrared beam of a Burleigh FCL-20 color-center laser overlaps a parallel mass-selected 3-keV ion beam and induces vibrational-rotational transitions. The laser-excited ionic state autodetaches, yielding a fast (keV) collinear neutral NH, which is detected by secondary electron emission. Resonances are observed by scanning the ion velocity with fixed laser frequency. Our results more than quadruple the number of high-precision measurements in this system. Our results include the important Q and
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Drljača, Tamara, Kristina Stevanović, Draginja Radošević, Jelena Milićević, Nevena Veljković та Sanja Glišić. "In silico screening of Solanum lycopersicum carotenoids from Carotenoids Database for candidates PPARα agonists". У 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.605d.

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Peroxisome proliferator-activated receptor alpha (PPARα) is crucial in regulating lipid metabolism. Clinically, PPARα is significant as a possible therapeutic target for a variety of human disorders, including cardiovascular, neurological, and metabolic syndromes. The wide range of natural compounds provides great opportunities for new approaches in targeting PPARα. Carotenoids, a large class of natural compounds, have been recognized as PPARα agonists. Tomatoes (Solanum lycopersicum) are one of the most widely grown crops in the world and contain compounds that improve lipid metabolism. Since
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Promyoo, Rapeepan, Hazim El-Mounayri, Varun Kumar Karingula, and Kody Varahramyan. "Tip-Based Nanomanufacturing (TBN) of Nanofluidics Using AFM." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8584.

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Recent developments in science and engineering have advanced the atomic manufacturing of nanoscale structures, allowing for improved high-performance technologies. The challenge now is to expand nanomanufacturing capabilities in order to fabricate a broader range of structures with higher complexity, greater precision and accuracy, and with substantially improved performance. Also, reducing the cost by avoiding the use of expensive equipment/processes is highly desirable. While current nanomanufacturing capabilities limit the commercialization of such nanoscale structures, AFM-based nanomachin
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Sperka, Jirí, Lenka Zajícková, Ondrej Jasek, et al. "Growth of Carbon Materials on Gold Substrate by Plasma Enhanced CVD." In 13th International Conference on Plasma Surface Engineering September 10 - 14, 2012, in Garmisch-Partenkirchen, Germany. Linköping University Electronic Press, 2013. http://dx.doi.org/10.3384/wcc2.395-398.

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Carbon is a versatile building element of many interesting materials that have already find practical applications in the form of thin films (diamond, DLC) or potential applications in the form of nanostructures (fullerenes, carbon nanotubes, graphene). For electronics or sensors, it is important to provide a very good contact to the functional structures. Gold is the best choice taking into account its inertness, i. e. oxidation resistance. From this point of view the investigation of the growth of carbon materials on gold is important. The carbon-gold interaction plays an important role in d
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Seeber, W., D. Ehrt, T. Danger, E. Heumann, E. Mix, and G. Huber. "Improved Yb-doped fluoride phosphate laser glasses with optimized local structure." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cml2.

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The favorable laser properties of Yb-doped earth alkaline fluorapalite crystals (FAP) have been demonstrated [1]. Fluoride phosphate (FP) glasses are a kind of amorphous analogon to these both fluoride and phosphate anions containing crystals. It could be shown that Yb-doped FP-glasses have the potential for cheap diode pumped cw-lasers acting at wavelength around 1.04 μm at room temperature (2). In first experiments using laser diodes emitting at 968 nm (longitudinal pumping geometry, hemispheric resonator with an output mirror of r = −5 cm radius of curvature, T = 2 %) and not optimized FP-g
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Salaudeen, Ibraheem, Muhammad Rehan Hashmet, and Peyman Pourafshary. "Synergistic Effects of Engineered Water-Nanoparticle on Oil/Brine/Rock Interactions in Carbonates." In SPE Europec featured at 82nd EAGE Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205150-ms.

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Abstract Nano particle-assisted engineered water is one of the newest hybrid methods of Enhanced Oil Recovery (EOR) that is gaining attention in the oil and gas industry. This is attributed to the low cost of the technique and environmental friendliness of the materials involved. Low salinity and ions adjustment of the injection brine has been reported to be very useful for improving oil production in carbonates, and application of nanoparticles (NPs) to improve oil recovery via different mechanisms such as wettability alteration, interfacial tension reduction, disjoining pressure and viscosit
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Siefert, John A., Jonathan D. Parker, Ryan MacLachlan, Sabrina Yan, and Rachel Thomson. "Assessment and Quantification of Damage in the Grade 91 Steel Partially Transformed Zone." In AM-EPRI 2019, edited by J. Shingledecker and M. Takeyama. ASM International, 2019. http://dx.doi.org/10.31399/asm.cp.am-epri-2019p0022.

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Abstract Damage in the grade 91 steel partially transformed zone of weld heat affected zones has historically been associated with many different types of microstructural features. Features described as being responsible for the nucleation of creep damage include particles such as laves phase, coarse M23C6, inclusions, nitrides, or interactions between creep strong and creep week grains, grain boundaries and potentially other sources. Few studies have attempted to link the observations of damage on scales of increasing detail from macro, to micro, to nano. Similarly, assessments are not made o
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