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1. Sr-Doped Molecular Hydrogen: Synthesis and Properties of SrH$_{22}$

Author

Semenok, Dmitrii V., Chen, Wuhao, Huang, Xiaoli, Zhou, Di, Kruglov, Ivan A., Mazitov, Arslan B., Galasso, Michele, Tantardini, Christian, Gonze, Xavier, Kvashnin, Alexander G., Oganov, Artem R., and Cui, Tian

Subjects
Condensed Matter - Materials Science
Abstract

Recently, several research groups announced reaching the point of metallization of hydrogen above 400 GPa. Following the mainstream of extensive investigations of compressed polyhydrides, in this work we demonstrate that small (4 atom %) doping of molecular hydrogen by strontium leads to a dramatic reduction in the metallization pressure to about 200 GPa. Studying the high-pressure chemistry of the Sr-H system at 56-180 GPa, we observed the formation of several previously unknown compounds: C2/m-Sr$_3$H$_{13}$, pseudocubic SrH$_6$, SrH$_9$ with cubic F-43m Sr sublattice, and pseudotetragonal P1-SrH$_{22}$, the metal hydride with the highest hydrogen content discovered so far. Unlike Ca and Y, strontium forms molecular semiconducting polyhydrides, whereas calcium and yttrium polyhydrides are high-Tc superconductors with an atomic H sublattice. The latter phase, SrH$_{22}$ or Sr$_{0.04}$H$_{0.96}$, may be considered as a convenient model of the consistent bandgap closure and metallization of hydrogen. Using the impedance measurements in diamond anvil cells at 300-440 K, we estimated the direct bandgap of the Pm-3n-like compound P1-SrH$_6$ to be 0.44-0.51 eV at 150 GPa, and its metallization pressure to be 220 GPa. Together with the machine learning interatomic potentials, the impedance spectroscopy allowed us to estimate the diffusion coefficients of hydrogen D$_H$ = 1.0-2.8 E-10 m$^2$/s in SrH$_6$ and 1.2-2.1 E-9 m$^2$/s in P1-SrH$_{22}$ at 500-600 K., Comment: Supporting information was compressed and reduced by 2 times to 36 figures

Published
2021
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4. Grain boundaries in minerals: atomic structure, phase transitions, and effect on strength of polycrystals

Author

Mazitov, Arslan B. and Oganov, Artem R.

Subjects
Condensed Matter - Materials Science, Physics - Computational Physics
Abstract

Grain boundaries (GBs) and interfaces in polycrystalline materials are significant research subjects in the field of materials science. Despite a more than 50-year history of their study, there are still many open questions. The main challenge in studying interfacial structures is the extreme complexity of their experimental and theoretical observation and description. The presence of phase-like states at grain boundaries called complexions requires even more effort in their study. Here, we demonstrate the effect of grain boundaries on the properties of polycrystalline minerals on the example of the $\Sigma$5[310](001) grain boundary in periclase (MgO). Using the combination of extended evolutionary algorithm USPEX and modern machine-learning interatomic potentials, we explore the configuration space of the specified grain boundary and predict its possible phase-like states. In addition to the widely studied CSL-type structure, we found several stable GB complexions with various atomic densities at the boundary plane. Analysis of grain boundary excess volume of the structures revealed the successive stages of GB failure under the tensile applied in the normal direction of the boundary plane. Our results demonstrate that interfacial chemistry and structural diversity can be surprisingly rich even in seemingly simple and thoroughly investigated materials. The phenomena we observe here are not specific to MgO and should be general.

Published
2021

5. Crystal structure prediction at finite temperatures

Author

Ivan A. Kruglov, Alexey V. Yanilkin, Yana Propad, Arslan B. Mazitov, Pavel Rachitskii, and Artem R. Oganov

Subjects
Materials of engineering and construction. Mechanics of materials, TA401-492, Computer software, QA76.75-76.765
Abstract

Abstract Crystal structure prediction is a central problem of crystallography and materials science, which until mid-2000s was considered intractable. Several methods, based on either energy landscape exploration or, more commonly, global optimization, largely solved this problem and enabled fully non-empirical computational materials discovery. A major shortcoming is that, to avoid expensive calculations of the entropy, crystal structure prediction was done at zero Kelvin, reducing to the search for the global minimum of the enthalpy rather than the free energy. As a consequence, high-temperature phases (especially those which are not quenchable to zero temperature) could be missed. Here we develop an accurate and affordable solution, enabling crystal structure prediction at finite temperatures. Structure relaxation and fully anharmonic free energy calculations are done by molecular dynamics with a forcefield (which can be anything from a parametric forcefield for simpler cases to a trained on-the-fly machine learning interatomic potential), the errors of which are corrected using thermodynamic perturbation theory to yield accurate results with full ab initio accuracy. We illustrate this method by applications to metals (probing the P–T phase diagram of Al and Fe), a refractory covalent solid (WB), an Earth-forming silicate MgSiO3 (at pressures and temperatures of the Earth’s lower mantle), and ceramic oxide HfO2.

Published
2023
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6. Evolutionary algorithm for prediction of the atomic structure of two-dimensional materials on substrates

Author

Mazitov, Arslan B. and Oganov, Artem R.

Subjects
Condensed Matter - Materials Science
Abstract

Today the study of two-dimensional (2D) materials has become one of the key objectives of materials science. Unlike their three-dimensional counterparts, 2D materials can simultaneously demonstrate unique transport and mechanical properties due to their dimensionality and quantum size effect. In their fabrication and application, 2D materials are usually located on top of the substrate or combined into heterostructures, which makes their structures and properties strongly depend on the nature and quality of the environment. Here, we present a novel method for studying the atomic structures of two-dimensional materials and epitaxial thin films on arbitrary substrates. The method can predict successful stages of epitaxial growth and the regions of stability of each atomic configuration with experimental parameters of interest. We demonstrate the performance of our methodology in the prediction of the atomic structure of MoS2 on Al2O3 (0001) substrate. The method is also applied to study the CVD growth of graphene and hexagonal boron nitride on Cu (111) substrates. In both cases, stable monolayer and multilayer structures were found. The stability of all the structures in terms of partial pressures of precursors and temperature of growth is predicted within the ab initio thermodynamics approach.

Published
2021

8. Dragon 1 Protocol Manuscript: Training, Accreditation, Implementation and Safety Evaluation of Portal and Hepatic Vein Embolization (PVE/HVE) to Accelerate Future Liver Remnant (FLR) Hypertrophy

Author

Korenblik, R., Olij, B., Aldrighetti, L. A., Hilal, M. Abu, Ahle, M., Arslan, B., van Baardewijk, L. J., Baclija, I., Bent, C., Bertrand, C. L., Björnsson, B., de Boer, M. T., de Boer, S. W., Bokkers, R. P. H., Rinkes, I. H. M. Borel, Breitenstein, S., Bruijnen, R. C. G., Bruners, P., Büchler, M. W., Camacho, J. C., Cappelli, A., Carling, U., Chan, B. K. Y., Chang, D. H., choi, J., Font, J. Codina, Crawford, M., Croagh, D., Cugat, E., Davis, R., De Boo, D. W., De Cobelli, F., De Wispelaere, J. F., van Delden, O. M., Delle, M., Detry, O., Díaz-Nieto, R., Dili, A., Erdmann, J. I., Fisher, O., Fondevila, C., Fretland, Å., Borobia, F. Garcia, Gelabert, A., Gérard, L., Giuliante, F., Gobardhan, P. D., Gómez, F., Grünberger, T., Grünhagen, D. J., Guitart, J., Hagendoorn, J., Heil, J., Heise, D., Herrero, E., Hess, G. F., Hoffmann, M. H., Iezzi, R., Imani, F., Nguyen, J., Jovine, E., Kalff, J. C., Kazemier, G., Kingham, T. P., Kleeff, J., Kollmar, O., Leclercq, W. K. G., Ben, S. Lopez, Lucidi, V., MacDonald, A., Madoff, D. C., Manekeller, S., Martel, G., Mehrabi, A., Mehrzad, H., Meijerink, M. R., Menon, K., Metrakos, P., Meyer, C., Moelker, A., Modi, S., Montanari, N., Navines, J., Neumann, U. P., Peddu, P., Primrose, J. N., Qu, X., Raptis, D., Ratti, F., Ridouani, F., Rogan, C., Ronellenfitsch, U., Ryan, S., Sallemi, C., Moragues, J. Sampere, Sandström, P., Sarriá, L., Schnitzbauer, A., Serenari, M., Serrablo, A., Smits, M. L. J., Sparrelid, E., Spüntrup, E., Stavrou, G. A., Sutcliffe, R. P., Tancredi, I., Tasse, J. C., Udupa, V., Valenti, D., Fundora, Y., Vogl, T. J., Wang, X., White, S. A., Wohlgemuth, W. A., Yu, D., Zijlstra, I. A. J., Binkert, C. A., Bemelmans, M. H. A., van der Leij, C., Schadde, E., and van Dam, R. M.

Published
2022
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10. Titanium-hydrogen interaction at megabar pressure

Author

Mazitov, Arslan B., Oganov, Artem R., and Yanilkin, Alexey V.

Subjects
Condensed Matter - Materials Science
Abstract

The process of transport of metal particles ($\mathit{ejecta}$) in gases is the subject of recent works in the field of nuclear energetics. We studied the process of dissolution of titanium ejecta in warm dense hydrogen at megabar pressure. Thermodynamic and kinetic properties of the process were investigated using classical and quantum molecular dynamics methods. We estimated the dissolution time of ejecta, the saturation limit of titanium atoms with hydrogen and the heat of dissolution. It was found that particles with a radius of 1 $\mu m$ dissolve in hydrogen in time of $1.5 \cdot 10^{-2} \ \mu s$, while the process of mixing can be described by diffusion law. The presented approach demonstrates the final state of the titanium-hydrogen system as a homogenized fluid with completely dissolved titanium particles. This result can be generalized to all external conditions under which titanium and hydrogen are atomic fluids.

Published
2018
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14. Abstract No. 292 Distribution of Interventional Radiology Expertise with Management of Primary Aldosteronism–Related Hypertension

Author

McLennan, G., primary, Quencer, K., additional, Dolmatch, B., additional, Kennedy, R., additional, McClure, T., additional, Vingan, H., additional, Arslan, B., additional, Werder, G., additional, Krishnasamy, V., additional, Le, T., additional, Meisinger, Q., additional, Muller, R., additional, Field, D., additional, Haddad, M., additional, Kumari, D., additional, Kulkarni, S., additional, Nguyen, Q., additional, Achakzai, B., additional, Sharma, P., additional, Chintalapudi, U., additional, and Penninga Brown, E., additional

Published
2024
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16. Broadband Optical Properties of Bi2Se3

Author

Georgy A. Ermolaev, Ivan S. Vyslanko, Andrey P. Tselin, Marwa A. El-Sayed, Mikhail K. Tatmyshevskiy, Aleksandr S. Slavich, Dmitry I. Yakubovsky, Mikhail S. Mironov, Arslan B. Mazitov, Amir Eghbali, Daria A. Panova, Roman I. Romanov, Andrey M. Markeev, Ivan A. Kruglov, Sergey M. Novikov, Andrey A. Vyshnevyy, Aleksey V. Arsenin, and Valentyn S. Volkov

Subjects
transition metal dichalcogenides, optical constants, refractive index, topological insulators, nanophotonics, spectroscopic ellipsometry, Chemistry, QD1-999
Abstract

Materials with high optical constants are of paramount importance for efficient light manipulation in nanophotonics applications. Recent advances in materials science have revealed that van der Waals (vdW) materials have large optical responses owing to strong in-plane covalent bonding and weak out-of-plane vdW interactions. However, the optical constants of vdW materials depend on numerous factors, e.g., synthesis and transfer method. Here, we demonstrate that in a broad spectral range (290–3300 nm) the refractive index n and the extinction coefficient k of Bi2Se3 are almost independent of synthesis technology, with only a ~10% difference in n and k between synthesis approaches, unlike other vdW materials, such as MoS2, which has a ~60% difference between synthesis approaches. As a practical demonstration, we showed, using the examples of biosensors and therapeutic nanoparticles, that this slight difference in optical constants results in reproducible efficiency in Bi2Se3-based photonic devices.

Published
2023
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18. Broadband optical properties of Ti3C2 MXene revisited

Author

Panova, Daria A., primary, Tselikov, Gleb I., additional, Ermolaev, Georgy A., additional, Syuy, Alexander V., additional, Zimbovskii, Dmitrii S., additional, Kapitanova, Olesya O., additional, Yakubovsky, Dmitry I., additional, Mazitov, Arslan B., additional, Kruglov, Ivan A., additional, Vyshnevyy, Andrey A., additional, Arsenin, Aleksey V., additional, and Volkov, Valentyn S., additional

Published
2023
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20. Broadband Optical Properties of Atomically Thin PtS2 and PtSe2

Author

Georgy A. Ermolaev, Kirill V. Voronin, Mikhail K. Tatmyshevskiy, Arslan B. Mazitov, Aleksandr S. Slavich, Dmitry I. Yakubovsky, Andrey P. Tselin, Mikhail S. Mironov, Roman I. Romanov, Andrey M. Markeev, Ivan A. Kruglov, Sergey M. Novikov, Andrey A. Vyshnevyy, Aleksey V. Arsenin, and Valentyn S. Volkov

Subjects
transition metal dichalcogenides, two-dimensional materials, optical constants, dielectric properties, refractive index, nano-photonics, Chemistry, QD1-999
Abstract

Noble transition metal dichalcogenides (TMDCs) such as PtS2 and PtSe2 show significant potential in a wide range of optoelectronic and photonic applications. Noble TMDCs, unlike standard TMDCs such as MoS2 and WS2, operate in the ultrawide spectral range from ultraviolet to mid-infrared wavelengths; however, their properties remain largely unexplored. Here, we measured the broadband (245–3300 nm) optical constants of ultrathin PtS2 and PtSe2 films to eliminate this gap and provide a foundation for optoelectronic device simulation. We discovered their broadband absorption and high refractive index both theoretically and experimentally. Based on first-principle calculations, we also predicted their giant out-of-plane optical anisotropy for monocrystals. As a practical illustration of the obtained optical properties, we demonstrated surface plasmon resonance biosensors with PtS2 or PtSe2 functional layers, which dramatically improves sensor sensitivity by 60 and 30%, respectively.

Published
2021
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21. Broadband Optical Constants and Nonlinear Properties of SnS2 and SnSe2

Author

Georgy A. Ermolaev, Dmitry I. Yakubovsky, Marwa A. El-Sayed, Mikhail K. Tatmyshevskiy, Arslan B. Mazitov, Anna A. Popkova, Ilya M. Antropov, Vladimir O. Bessonov, Aleksandr S. Slavich, Gleb I. Tselikov, Ivan A. Kruglov, Sergey M. Novikov, Andrey A. Vyshnevyy, Andrey A. Fedyanin, Aleksey V. Arsenin, and Valentyn S. Volkov

Subjects
two-dimensional materials, optical constants, dielectric properties, refractive index, nanophotonics, spectroscopic ellipsometry, Chemistry, QD1-999
Abstract

SnS2 and SnSe2 have recently been shown to have a wide range of applications in photonic and optoelectronic devices. However, because of incomplete knowledge about their optical characteristics, the use of SnS2 and SnSe2 in optical engineering remains challenging. Here, we addressed this problem by establishing SnS2 and SnSe2 linear and nonlinear optical properties in the broad (300–3300 nm) spectral range. Coupled with the first-principle calculations, our experimental study unveiled the full dielectric tensor of SnS2 and SnSe2. Furthermore, we established that SnS2 is a promising material for visible high refractive index nanophotonics. Meanwhile, SnSe2 demonstrates a stronger nonlinear response compared with SnS2. Our results create a solid ground for current and next-generation SnS2- and SnSe2-based devices.

Published
2021
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24. Broadband Optical Properties of Bi2Se3

Author

Ermolaev, Georgy A., primary, Vyslanko, Ivan S., additional, Tselin, Andrey P., additional, El-Sayed, Marwa A., additional, Tatmyshevskiy, Mikhail K., additional, Slavich, Aleksandr S., additional, Yakubovsky, Dmitry I., additional, Mironov, Mikhail S., additional, Mazitov, Arslan B., additional, Eghbali, Amir, additional, Panova, Daria A., additional, Romanov, Roman I., additional, Markeev, Andrey M., additional, Kruglov, Ivan A., additional, Novikov, Sergey M., additional, Vyshnevyy, Andrey A., additional, Arsenin, Aleksey V., additional, and Volkov, Valentyn S., additional

Published
2023
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32. Broadband Optical Constants and Nonlinear Properties of SnS2 and SnSe2

Author

Georgy A. Ermolaev, Dmitry I. Yakubovsky, Marwa A. El-Sayed, Mikhail K. Tatmyshevskiy, Arslan B. Mazitov, Anna A. Popkova, Ilya M. Antropov, Vladimir O. Bessonov, Aleksandr S. Slavich, Gleb I. Tselikov, Ivan A. Kruglov, Sergey M. Novikov, Andrey A. Vyshnevyy, Andrey A. Fedyanin, Aleksey V. Arsenin, and Valentyn S. Volkov

Subjects
Chemistry, two-dimensional materials, optical constants, dielectric properties, refractive index, nanophotonics, spectroscopic ellipsometry, second harmonic generation, General Chemical Engineering, General Materials Science, QD1-999
Abstract

SnS2 and SnSe2 have recently been shown to have a wide range of applications in photonic and optoelectronic devices. However, because of incomplete knowledge about their optical characteristics, the use of SnS2 and SnSe2 in optical engineering remains challenging. Here, we addressed this problem by establishing SnS2 and SnSe2 linear and nonlinear optical properties in the broad (300–3300 nm) spectral range. Coupled with the first-principle calculations, our experimental study unveiled the full dielectric tensor of SnS2 and SnSe2. Furthermore, we established that SnS2 is a promising material for visible high refractive index nanophotonics. Meanwhile, SnSe2 demonstrates a stronger nonlinear response compared with SnS2. Our results create a solid ground for current and next-generation SnS2- and SnSe2-based devices.

Published
2022

33. Nickel Salicylaldoxime-Based Coordination Polymer as a Cathode for Lithium-Ion Batteries

Author

Evgenii V. Beletskii, Daniil A. Lukyanov, Petr S. Vlasov, Andrei N. Yankin, Arslan B. Atangulov, Vladimir V. Sizov, and Oleg V. Levin

Subjects
MOP, NiSalen, lithium-ion, supercapacitor, cathode material, nickel, Technology
Abstract

Conjugated coordination polymers attract attention as materials for electrochemical energy storage, mostly as cathode materials for supercapacitors. Faradaic capacity may be introduced to such materials using redox-active building blocks, metals, or ligands. Using this strategy, a novel hybrid cathode material was developed based on a Ni2+ metal-organic polymer. The proposed material, in addition to double-layer capacitance, shows high pseudocapacitance, which arises from the contributions of both the metal center and ligand. A tailoring strategy in the ligand design allows us to minimize the molecular weight of the ligand, which increases its gravimetric energy. According to computational results, the ligand makes the prevailing contribution to the pseudocapacitance of the material. Different approaches to metal–organic polymer (MOP) synthesis were implemented, and the obtained materials were examined by FTIR, Raman spectroscopy, powder XRD, SEM/EDX (energy-dispersive X-ray spectroscopy), TEM, and thermal analysis. Energy-storage performance was comparatively studied with cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD). As a result, materials with an excellent discharge capacity were obtained, reaching the gravimetric energy density of common inorganic cathode materials.

Published
2020
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34. 'My Robot Friend': Application of Intergroup Contact Theory in Human-Robot Interaction

Author

Akay, Selen, Arslan, B., Bağcı, S. C., Kanero, J., Akay, Selen, Arslan, B., Bağcı, S. C., and Kanero, J.

Subjects
Social robot, Contact theory, Human-robot interaction, Secondary transfer effect, Intergroup relations
Abstract

Conference Name: ACM/IEEE International Conference on Human-Robot Interaction (HRI) Date of Conference: 07-10 March 2022 We present pilot data for one of the first comprehensive investigations of Intergroup Contact Theory [1], [2] in the context of human-robot interaction. Applying an actual intergroup contact procedure known to affect intergroup attitudes among humans (e.g., [3]), we examined whether human-robot interaction as a positive intergroup contact would change participants' evaluation of robots. Our data from 28 student participants ( N=15 in the interaction condition and N=13 in the no-interaction condition) suggest that after the participant and robot self-disclosed to each other (Fast Friendship Task), participants (1) felt more positive emotions towards robots, (2) perceived robots as warmer, and (3) identified robots as more similar to humans. These preliminary findings invite further research on the application of Intergroup Contact Theory in examining social human-robot interaction and its possible contributions to understanding human psychology.

Published
2022

35. Sr‐Doped Superionic Hydrogen Glass: Synthesis and Properties of SrH 22

Author

Semenok, Dmitrii V., primary, Chen, Wuhao, additional, Huang, Xiaoli, additional, Zhou, Di, additional, Kruglov, Ivan A., additional, Mazitov, Arslan B., additional, Galasso, Michele, additional, Tantardini, Christian, additional, Gonze, Xavier, additional, Kvashnin, Alexander G., additional, Oganov, Artem R., additional, and Cui, Tian, additional

Published
2022
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37. Grain Boundaries in Minerals: Atomic Structure, Phase Transitions, and Effect on Strength of Polycrystals

Author

Arslan B. Mazitov and Artem R. Oganov

Subjects
Condensed Matter - Materials Science, Phase transition, Condensed matter physics, Field (physics), Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, Geology, Computational Physics (physics.comp-ph), engineering.material, Geochemistry and Petrology, Ultimate tensile strength, Materials Chemistry, engineering, Economic Geology, Grain boundary, Configuration space, Crystallite, Periclase, Physics - Computational Physics, Normal
Abstract

Grain boundaries (GBs) and interfaces in polycrystalline materials are significant research subjects in the field of materials science. Despite a more than 50-year history of their study, there are still many open questions. The main challenge in studying interfacial structures is the extreme complexity of their experimental and theoretical observation and description. The presence of phase-like states at grain boundaries called complexions requires even more effort in their study. Here, we demonstrate the effect of grain boundaries on the properties of polycrystalline minerals on the example of the $\Sigma$5[310](001) grain boundary in periclase (MgO). Using the combination of extended evolutionary algorithm USPEX and modern machine-learning interatomic potentials, we explore the configuration space of the specified grain boundary and predict its possible phase-like states. In addition to the widely studied CSL-type structure, we found several stable GB complexions with various atomic densities at the boundary plane. Analysis of grain boundary excess volume of the structures revealed the successive stages of GB failure under the tensile applied in the normal direction of the boundary plane. Our results demonstrate that interfacial chemistry and structural diversity can be surprisingly rich even in seemingly simple and thoroughly investigated materials. The phenomena we observe here are not specific to MgO and should be general.

Published
2021

38. Sr-Doped Superionic Hydrogen Glass: Synthesis and Properties of SrH

Author

Dmitrii V, Semenok, Wuhao, Chen, Xiaoli, Huang, Di, Zhou, Ivan A, Kruglov, Arslan B, Mazitov, Michele, Galasso, Christian, Tantardini, Xavier, Gonze, Alexander G, Kvashnin, Artem R, Oganov, and Tian, Cui

Abstract

Recently, several research groups announced reaching the point of metallization of hydrogen above 400 GPa. Despite notable progress, detecting superconductivity in compressed hydrogen remains an unsolved problem. Following the mainstream of extensive investigations of compressed metal polyhydrides, here small doping of molecular hydrogen by strontium is demonstrated to lead to a dramatic reduction in the metallization pressure to ≈200 GPa. Studying the high-pressure chemistry of the Sr-H system, the formation of several new phases is observed: C2/m-Sr

Published
2022

40. Dragon 1 Protocol Manuscript: Training, Accreditation, Implementation and Safety Evaluation of Portal and Hepatic Vein Embolization (PVE/HVE) to Accelerate Future Liver Remnant (FLR) Hypertrophy.

Author

UCL - SSS/IREC/IMAG - Pôle d'imagerie médicale, UCL - SSS/IREC/GAEN - Pôle d'Hépato-gastro-entérologie, UCL - SSS/IREC/MONT - Pôle Mont Godinne, UCL - (MGD) Service de chirurgie, UCL - (MGD) Service de radiologie - résonance magnétique, Korenblik, R, Olij, B, Aldrighetti, L A, Hilal, M Abu, Ahle, M, Arslan, B, van Baardewijk, L J, Baclija, I, Bent, C, Claude, Bertrand, Björnsson, B, de Boer, M T, de Boer, S W, Bokkers, R P H, Rinkes, I H M Borel, Breitenstein, S, Bruijnen, R C G, Bruners, P, Büchler, M W, Camacho, J C, Cappelli, A, Carling, U, Chan, B K Y, Chang, D H, Choi, J, Font, J Codina, Crawford, M, Croagh, D, Cugat, E, Davis, R, De Boo, D W, De Cobelli, F, De Wispelaere, Jean-François, van Delden, O M, Delle, M, Detry, O, Díaz-Nieto, R, Dili, Alexandra, Erdmann, J I, Fisher, O, Fondevila, C, Fretland, Å, Borobia, F Garcia, Gelabert, A, Gérard, L, Giuliante, F, Gobardhan, P D, Gómez, F, Grünberger, T, Grünhagen, D J, Guitart, J, Hagendoorn, J, Heil, J, Heise, D, Herrero, E, Hess, G F, Hoffmann, M H, Iezzi, R, Imani, F, Nguyen, J, Jovine, E, Kalff, J C, Kazemier, G, Kingham, T P, Kleeff, J, Kollmar, O, Leclercq, W K G, Ben, S Lopez, Lucidi, V, MacDonald, A, Madoff, D C, Manekeller, S, Martel, G, Mehrabi, A, Mehrzad, H, Meijerink, M R, Menon, K, Metrakos, P, Meyer, C, Moelker, A, Modi, S, Montanari, N, Navines, J, Neumann, U P, Peddu, P, Primrose, J N, Qu, X, Raptis, D, Ratti, F, Ridouani, F, Rogan, C, Ronellenfitsch, U, Ryan, S, Sallemi, C, Moragues, J Sampere, Sandström, P, Sarriá, L, Schnitzbauer, A, Serenari, M, Serrablo, A, Smits, M L J, Sparrelid, E, Spüntrup, E, Stavrou, G A, Sutcliffe, R P, Tancredi, I, Tasse, J C, Udupa, V, Valenti, D, Fundora, Y, Vogl, T J, Wang, X, White, S A, Wohlgemuth, W A, Yu, D, Zijlstra, I A J, Binkert, C A, Bemelmans, M H A, van der Leij, C, Schadde, E, van Dam, R M, UCL - SSS/IREC/IMAG - Pôle d'imagerie médicale, UCL - SSS/IREC/GAEN - Pôle d'Hépato-gastro-entérologie, UCL - SSS/IREC/MONT - Pôle Mont Godinne, UCL - (MGD) Service de chirurgie, UCL - (MGD) Service de radiologie - résonance magnétique, Korenblik, R, Olij, B, Aldrighetti, L A, Hilal, M Abu, Ahle, M, Arslan, B, van Baardewijk, L J, Baclija, I, Bent, C, Claude, Bertrand, Björnsson, B, de Boer, M T, de Boer, S W, Bokkers, R P H, Rinkes, I H M Borel, Breitenstein, S, Bruijnen, R C G, Bruners, P, Büchler, M W, Camacho, J C, Cappelli, A, Carling, U, Chan, B K Y, Chang, D H, Choi, J, Font, J Codina, Crawford, M, Croagh, D, Cugat, E, Davis, R, De Boo, D W, De Cobelli, F, De Wispelaere, Jean-François, van Delden, O M, Delle, M, Detry, O, Díaz-Nieto, R, Dili, Alexandra, Erdmann, J I, Fisher, O, Fondevila, C, Fretland, Å, Borobia, F Garcia, Gelabert, A, Gérard, L, Giuliante, F, Gobardhan, P D, Gómez, F, Grünberger, T, Grünhagen, D J, Guitart, J, Hagendoorn, J, Heil, J, Heise, D, Herrero, E, Hess, G F, Hoffmann, M H, Iezzi, R, Imani, F, Nguyen, J, Jovine, E, Kalff, J C, Kazemier, G, Kingham, T P, Kleeff, J, Kollmar, O, Leclercq, W K G, Ben, S Lopez, Lucidi, V, MacDonald, A, Madoff, D C, Manekeller, S, Martel, G, Mehrabi, A, Mehrzad, H, Meijerink, M R, Menon, K, Metrakos, P, Meyer, C, Moelker, A, Modi, S, Montanari, N, Navines, J, Neumann, U P, Peddu, P, Primrose, J N, Qu, X, Raptis, D, Ratti, F, Ridouani, F, Rogan, C, Ronellenfitsch, U, Ryan, S, Sallemi, C, Moragues, J Sampere, Sandström, P, Sarriá, L, Schnitzbauer, A, Serenari, M, Serrablo, A, Smits, M L J, Sparrelid, E, Spüntrup, E, Stavrou, G A, Sutcliffe, R P, Tancredi, I, Tasse, J C, Udupa, V, Valenti, D, Fundora, Y, Vogl, T J, Wang, X, White, S A, Wohlgemuth, W A, Yu, D, Zijlstra, I A J, Binkert, C A, Bemelmans, M H A, van der Leij, C, Schadde, E, and van Dam, R M

Abstract

The DRAGON 1 trial aims to assess training, implementation, safety and feasibility of combined portal- and hepatic-vein embolization (PVE/HVE) to accelerate future liver remnant (FLR) hypertrophy in patients with borderline resectable colorectal cancer liver metastases. The DRAGON 1 trial is a worldwide multicenter prospective single arm trial. The primary endpoint is a composite of the safety of PVE/HVE, 90-day mortality, and one year accrual monitoring of each participating center. Secondary endpoints include: feasibility of resection, the used PVE and HVE techniques, FLR-hypertrophy, liver function (subset of centers), overall survival, and disease-free survival. All complications after the PVE/HVE procedure are documented. Liver volumes will be measured at week 1 and if applicable at week 3 and 6 after PVE/HVE and follow-up visits will be held at 1, 3, 6, and 12 months after the resection. Not applicable. DRAGON 1 is a prospective trial to assess the safety and feasibility of PVE/HVE. Participating study centers will be trained, and procedures standardized using Work Instructions (WI) to prepare for the DRAGON 2 randomized controlled trial. Outcomes should reveal the accrual potential of centers, safety profile of combined PVE/HVE and the effect of FLR-hypertrophy induction by PVE/HVE in patients with CRLM and a small FLR. Clinicaltrials.gov: NCT04272931 (February 17, 2020). Toestingonline.nl: NL71535.068.19 (September 20, 2019).

Published
2022

41. Sr‐Doped Superionic Hydrogen Glass: Synthesis and Properties of SrH22

Author

UCL - SST/IMCN/MODL - Modelling, Semenok, Dmitrii V., Chen, Wuhao, Huang, Xiaoli, Zhou, Di, Kruglov, Ivan A., Mazitov, Arslan B., Galasso, Michele, Tantardini, Christian, Gonze, Xavier, Kvashnin, Alexander G., Oganov, Artem R., Cui, Tian, UCL - SST/IMCN/MODL - Modelling, Semenok, Dmitrii V., Chen, Wuhao, Huang, Xiaoli, Zhou, Di, Kruglov, Ivan A., Mazitov, Arslan B., Galasso, Michele, Tantardini, Christian, Gonze, Xavier, Kvashnin, Alexander G., Oganov, Artem R., and Cui, Tian

Abstract

Recently, several research groups announced reaching the point of metallization of hydrogen above 400 GPa. Despite notable progress, detecting superconductivity in compressed hydrogen remains an unsolved problem. Following the mainstream of extensive investigations of compressed metal polyhydrides, here small doping of molecular hydrogen by strontium is demonstrated to lead to a dramatic reduction in the metallization pressure to ≈200 GPa. Studying the high-pressure chemistry of the Sr–H system, the formation of several new phases is observed: C2/m-Sr3H13, pseudocubic SrH6, SrH9 with cubic F43m-Sr sublattice, and pseudo tetragonal superionic P1-SrH22, the metal hydride with the highest hydrogen content (96 at%) discovered so far. High diffusion coefficients of hydrogen in the latter phase DH = 0.2–2.1 × 10−9 m2 s−1 indicate an amorphous state of the H-sublattice, whereas the strontium sublattice remains solid. Unlike Ca and Y, strontium forms molecular semiconducting polyhydrides, whereas calcium and yttrium polyhydrides are high-TC superconductors with an atomic H sublattice. The discovered SrH22, a kind of hydrogen sponge, opens a new class of materials with ultrahigh content of hydrogen.

Published
2022

42. Dragon 1 Protocol Manuscript:Training, Accreditation, Implementation and Safety Evaluation of Portal and Hepatic Vein Embolization (PVE/HVE) to Accelerate Future Liver Remnant (FLR) Hypertrophy

Author

Korenblik, R., Olij, B., Aldrighetti, L. A., Hilal, M. Abu, Ahle, M., Arslan, B., van Baardewijk, L. J., Baclija, I., Bent, C., Bertrand, C. L., Björnsson, B., de Boer, M. T., de Boer, S. W., Bokkers, R. P.H., Rinkes, I. H.M.Borel, Breitenstein, S., Bruijnen, R. C.G., Bruners, P., Büchler, M. W., Camacho, J. C., Cappelli, A., Carling, U., Chan, B. K.Y., Chang, D. H., choi, J., Font, J. Codina, Crawford, M., Croagh, D., Cugat, E., Davis, R., De Boo, D. W., De Cobelli, F., De Wispelaere, J. F., van Delden, O. M., Delle, M., Detry, O., Díaz-Nieto, R., Dili, A., Erdmann, J. I., Fisher, O., Fondevila, C., Fretland, Borobia, F. Garcia, Gelabert, A., Gérard, L., Giuliante, F., Gobardhan, P. D., Gómez, F., Grünberger, T., Grünhagen, D. J., Guitart, J., Hagendoorn, J., Heil, J., Heise, D., Herrero, E., Hess, G. F., Hoffmann, M. H., Iezzi, R., Imani, F., Nguyen, J., Jovine, E., Kalff, J. C., Kazemier, G., Kingham, T. P., Kleeff, J., Kollmar, O., Leclercq, W. K.G., Ben, S. Lopez, Lucidi, V., MacDonald, A., Madoff, D. C., Manekeller, S., Martel, G., Mehrabi, A., Mehrzad, H., Meijerink, M. R., Menon, K., Metrakos, P., Meyer, C., Moelker, A., Modi, S., Montanari, N., Navines, J., Neumann, U. P., Peddu, P., Primrose, J. N., Qu, X., Raptis, D., Ratti, F., Ridouani, F., Rogan, C., Ronellenfitsch, U., Ryan, S., Sallemi, C., Moragues, J. Sampere, Sandström, P., Sarriá, L., Schnitzbauer, A., Serenari, M., Serrablo, A., Smits, M. L.J., Sparrelid, E., Spüntrup, E., Stavrou, G. A., Sutcliffe, R. P., Tancredi, I., Tasse, J. C., Udupa, V., Valenti, D., Fundora, Y., Vogl, T. J., Wang, X., White, S. A., Wohlgemuth, W. A., Yu, D., Zijlstra, I. A.J., Binkert, C. A., Bemelmans, M. H.A., van der Leij, C., Schadde, E., van Dam, R. M., Korenblik, R., Olij, B., Aldrighetti, L. A., Hilal, M. Abu, Ahle, M., Arslan, B., van Baardewijk, L. J., Baclija, I., Bent, C., Bertrand, C. L., Björnsson, B., de Boer, M. T., de Boer, S. W., Bokkers, R. P.H., Rinkes, I. H.M.Borel, Breitenstein, S., Bruijnen, R. C.G., Bruners, P., Büchler, M. W., Camacho, J. C., Cappelli, A., Carling, U., Chan, B. K.Y., Chang, D. H., choi, J., Font, J. Codina, Crawford, M., Croagh, D., Cugat, E., Davis, R., De Boo, D. W., De Cobelli, F., De Wispelaere, J. F., van Delden, O. M., Delle, M., Detry, O., Díaz-Nieto, R., Dili, A., Erdmann, J. I., Fisher, O., Fondevila, C., Fretland, Borobia, F. Garcia, Gelabert, A., Gérard, L., Giuliante, F., Gobardhan, P. D., Gómez, F., Grünberger, T., Grünhagen, D. J., Guitart, J., Hagendoorn, J., Heil, J., Heise, D., Herrero, E., Hess, G. F., Hoffmann, M. H., Iezzi, R., Imani, F., Nguyen, J., Jovine, E., Kalff, J. C., Kazemier, G., Kingham, T. P., Kleeff, J., Kollmar, O., Leclercq, W. K.G., Ben, S. Lopez, Lucidi, V., MacDonald, A., Madoff, D. C., Manekeller, S., Martel, G., Mehrabi, A., Mehrzad, H., Meijerink, M. R., Menon, K., Metrakos, P., Meyer, C., Moelker, A., Modi, S., Montanari, N., Navines, J., Neumann, U. P., Peddu, P., Primrose, J. N., Qu, X., Raptis, D., Ratti, F., Ridouani, F., Rogan, C., Ronellenfitsch, U., Ryan, S., Sallemi, C., Moragues, J. Sampere, Sandström, P., Sarriá, L., Schnitzbauer, A., Serenari, M., Serrablo, A., Smits, M. L.J., Sparrelid, E., Spüntrup, E., Stavrou, G. A., Sutcliffe, R. P., Tancredi, I., Tasse, J. C., Udupa, V., Valenti, D., Fundora, Y., Vogl, T. J., Wang, X., White, S. A., Wohlgemuth, W. A., Yu, D., Zijlstra, I. A.J., Binkert, C. A., Bemelmans, M. H.A., van der Leij, C., Schadde, E., and van Dam, R. M.

Abstract

Study Purpose: The DRAGON 1 trial aims to assess training, implementation, safety and feasibility of combined portal- and hepatic-vein embolization (PVE/HVE) to accelerate future liver remnant (FLR) hypertrophy in patients with borderline resectable colorectal cancer liver metastases. Methods: The DRAGON 1 trial is a worldwide multicenter prospective single arm trial. The primary endpoint is a composite of the safety of PVE/HVE, 90-day mortality, and one year accrual monitoring of each participating center. Secondary endpoints include: feasibility of resection, the used PVE and HVE techniques, FLR-hypertrophy, liver function (subset of centers), overall survival, and disease-free survival. All complications after the PVE/HVE procedure are documented. Liver volumes will be measured at week 1 and if applicable at week 3 and 6 after PVE/HVE and follow-up visits will be held at 1, 3, 6, and 12 months after the resection. Results: Not applicable. Conclusion: DRAGON 1 is a prospective trial to assess the safety and feasibility of PVE/HVE. Participating study centers will be trained, and procedures standardized using Work Instructions (WI) to prepare for the DRAGON 2 randomized controlled trial. Outcomes should reveal the accrual potential of centers, safety profile of combined PVE/HVE and the effect of FLR-hypertrophy induction by PVE/HVE in patients with CRLM and a small FLR. Trial Registration: Clinicaltrials.gov: NCT04272931 (February 17, 2020). Toestingonline.nl: NL71535.068.19 (September 20, 2019).

Published
2022

43. Dragon 1 Protocol Manuscript: Training, Accreditation, Implementation and Safety Evaluation of Portal and Hepatic Vein Embolization (PVE/HVE) to Accelerate Future Liver Remnant (FLR) Hypertrophy

Author

Zorgeenheid Orthopaedie Medisch, MS Radiologie, MS CGO, Regenerative Medicine and Stem Cells, Cancer, Other research (not in main researchprogram), Experimentele Afdeling Longziekten, Korenblik, R, Olij, B, Aldrighetti, L A, Hilal, M Abu, Ahle, M, Arslan, B, van Baardewijk, L J, Baclija, I, Bent, C, Bertrand, C L, Björnsson, B, de Boer, M T, de Boer, S W, Bokkers, R P H, Rinkes, I H M Borel, Breitenstein, S, Bruijnen, R C G, Bruners, P, Büchler, M W, Camacho, J C, Cappelli, A, Carling, U, Chan, B K Y, Chang, D H, Choi, J, Font, J Codina, Crawford, M, Croagh, D, Cugat, E, Davis, R, De Boo, D W, De Cobelli, F, De Wispelaere, J F, van Delden, O M, Delle, M, Detry, O, Díaz-Nieto, R, Dili, A, Erdmann, J I, Fisher, O, Fondevila, C, Fretland, Å, Borobia, F Garcia, Gelabert, A, Gérard, L, Giuliante, F, Gobardhan, P D, Gómez, F, Grünberger, T, Grünhagen, D J, Guitart, J, Hagendoorn, J, Heil, J, Heise, D, Herrero, E, Hess, G F, Hoffmann, M H, Iezzi, R, Imani, F, Nguyen, J, Jovine, E, Kalff, J C, Kazemier, G, Kingham, T P, Kleeff, J, Kollmar, O, Leclercq, W K G, Ben, S Lopez, Lucidi, V, MacDonald, A, Madoff, D C, Manekeller, S, Martel, G, Mehrabi, A, Mehrzad, H, Meijerink, M R, Menon, K, Metrakos, P, Meyer, C, Moelker, A, Modi, S, Montanari, N, Navines, J, Neumann, U P, Peddu, P, Primrose, J N, Qu, X, Raptis, D, Ratti, F, Ridouani, F, Rogan, C, Ronellenfitsch, U, Ryan, S, Sallemi, C, Moragues, J Sampere, Sandström, P, Sarriá, L, Schnitzbauer, A, Serenari, M, Serrablo, A, Smits, M L J, Sparrelid, E, Spüntrup, E, Stavrou, G A, Sutcliffe, R P, Tancredi, I, Tasse, J C, Udupa, V, Valenti, D, Fundora, Y, Vogl, T J, Wang, X, White, S A, Wohlgemuth, W A, Yu, D, Zijlstra, I A J, Binkert, C A, Bemelmans, M H A, van der Leij, C, Schadde, E, van Dam, R M, Zorgeenheid Orthopaedie Medisch, MS Radiologie, MS CGO, Regenerative Medicine and Stem Cells, Cancer, Other research (not in main researchprogram), Experimentele Afdeling Longziekten, Korenblik, R, Olij, B, Aldrighetti, L A, Hilal, M Abu, Ahle, M, Arslan, B, van Baardewijk, L J, Baclija, I, Bent, C, Bertrand, C L, Björnsson, B, de Boer, M T, de Boer, S W, Bokkers, R P H, Rinkes, I H M Borel, Breitenstein, S, Bruijnen, R C G, Bruners, P, Büchler, M W, Camacho, J C, Cappelli, A, Carling, U, Chan, B K Y, Chang, D H, Choi, J, Font, J Codina, Crawford, M, Croagh, D, Cugat, E, Davis, R, De Boo, D W, De Cobelli, F, De Wispelaere, J F, van Delden, O M, Delle, M, Detry, O, Díaz-Nieto, R, Dili, A, Erdmann, J I, Fisher, O, Fondevila, C, Fretland, Å, Borobia, F Garcia, Gelabert, A, Gérard, L, Giuliante, F, Gobardhan, P D, Gómez, F, Grünberger, T, Grünhagen, D J, Guitart, J, Hagendoorn, J, Heil, J, Heise, D, Herrero, E, Hess, G F, Hoffmann, M H, Iezzi, R, Imani, F, Nguyen, J, Jovine, E, Kalff, J C, Kazemier, G, Kingham, T P, Kleeff, J, Kollmar, O, Leclercq, W K G, Ben, S Lopez, Lucidi, V, MacDonald, A, Madoff, D C, Manekeller, S, Martel, G, Mehrabi, A, Mehrzad, H, Meijerink, M R, Menon, K, Metrakos, P, Meyer, C, Moelker, A, Modi, S, Montanari, N, Navines, J, Neumann, U P, Peddu, P, Primrose, J N, Qu, X, Raptis, D, Ratti, F, Ridouani, F, Rogan, C, Ronellenfitsch, U, Ryan, S, Sallemi, C, Moragues, J Sampere, Sandström, P, Sarriá, L, Schnitzbauer, A, Serenari, M, Serrablo, A, Smits, M L J, Sparrelid, E, Spüntrup, E, Stavrou, G A, Sutcliffe, R P, Tancredi, I, Tasse, J C, Udupa, V, Valenti, D, Fundora, Y, Vogl, T J, Wang, X, White, S A, Wohlgemuth, W A, Yu, D, Zijlstra, I A J, Binkert, C A, Bemelmans, M H A, van der Leij, C, Schadde, E, and van Dam, R M

Published
2022

45. Nickel Salicylideniminato 1D MOFs via Electrochemical Polymerization

Author

Daniil A. Lukyanov, Arslan B. Atangulov, A. N. Yankin, Vladimir V. Sizov, E. V. Beletskii, Anatoliy A. Vereshchagin, and Oleg V. Levin

Subjects
Nickel, Materials science, chemistry, Chemical engineering, Electrochemical polymerization, Electrochemistry, chemistry.chemical_element, Catalysis
Published
2022

46. Driver social desirability scale: A Turkish adaptation and examination in the driving context

Author

Yılmaz, Ş, Arslan, B, Öztürk, İ, Özkan, Ö, Özkan, T, and Lajunen, T

Abstract

Self-report data collection methods are widely used techniques to gather information in studies related to road safety. One of the most considerable limitations of self-reports is social desirability bias. One way to overcome the possible detrimental effects of socially desirable responding is to control it by using social desirability scales. With respect to that, the present study aims to adapt the Driver Social Desirability Scale into Turkish, examine its construct validity, and investigate the relationship between social desirability and driving-related measures. A total of 351 drivers between the ages of 19 and 59 completed a questionnaire including a demographic information form, the Driver Behavior Questionnaire (DBQ), the Driver Skill Inventory (DSI), the Two-Dimensional Social Desirability Scale (SDS), and the Driver Social Desirability Scale (DSDS). Factor analysis supported the two-factor structure of the DSDS in the Turkish sample. Social desirability correlated positively with age and driving experience. Female drivers reported higher levels of driver impression management, while male drivers scored higher on self-deception. Driver impression management was associated negatively with violations and perceptual-motor skills and positively with safety skills. Lastly, driver self-deception was positively related to violations, positive driver behaviors, perceptual-motor skills, and safety skills. The study shows that the Turkish version of the DSDS is a reliable and structurally valid instrument with incremental validity compared to the general social desirability measure in predicting driving-related outcomes.

Published
2022

49. Broadband Optical Properties of Atomically Thin PtS2 and PtSe2

Author

Kirill V. Voronin, Andrey M. Markeev, Mikhail K. Tatmyshevskiy, Arslan B. Mazitov, Georgy A. Ermolaev, Valentyn S. Volkov, Aleksey V. Arsenin, Aleksandr S. Slavich, R. I. Romanov, Sergey M. Novikov, Mikhail S. Mironov, Ivan A. Kruglov, Andrey A. Vyshnevyy, Andrey P. Tselin, and Dmitry I. Yakubovsky

Subjects
nano-photonics, Materials science, refractive index, business.industry, High-refractive-index polymer, General Chemical Engineering, transition metal dichalcogenides, Nanophotonics, Dielectric, medicine.disease_cause, two-dimensional materials, optical constants, dielectric properties, spectroscopic ellipsometry, Wavelength, Chemistry, medicine, Optoelectronics, General Materials Science, Surface plasmon resonance, Photonics, business, Refractive index, QD1-999, Ultraviolet
Abstract

Noble transition metal dichalcogenides (TMDCs) such as PtS2 and PtSe2 show significant potential in a wide range of optoelectronic and photonic applications. Noble TMDCs, unlike standard TMDCs such as MoS2 and WS2, operate in the ultrawide spectral range from ultraviolet to mid-infrared wavelengths; however, their properties remain largely unexplored. Here, we measured the broadband (245–3300 nm) optical constants of ultrathin PtS2 and PtSe2 films to eliminate this gap and provide a foundation for optoelectronic device simulation. We discovered their broadband absorption and high refractive index both theoretically and experimentally. Based on first-principle calculations, we also predicted their giant out-of-plane optical anisotropy for monocrystals. As a practical illustration of the obtained optical properties, we demonstrated surface plasmon resonance biosensors with PtS2 or PtSe2 functional layers, which dramatically improves sensor sensitivity by 60 and 30%, respectively.

Published
2021

50. Unexpected difficult airway with hypogonadotropic hypogonadism

Author

Yaman F, Arslan B, Yuvanç E, and Büyükkoçak Ü

Subjects
Medicine (General), R5-920
Abstract

Ferda Yaman,1 Bengi Arslan,2 Ercan Yuvanç,3 Ünase Büyükkoçak1 1Anesthesiology and Reanimation Department, 2Otorhinolaryngology Head and Neck Surgery Department, 3Urology Department, Faculty of Medicine, Kirikkale University, Kirikkale, Turkey Background: A critical aspect of safe general anesthesia is providing adequate ventilation and oxygenation. Failed endotracheal intubation and inadequate ventilation with insufficient oxygenation may lead to serious complications, even death. Anesthesiologists rarely encounter unexpected difficult airway problems in daily routine. Management of an unexpectedly difficult airway consists of laryngeal mask ventilation, gum-elastic bougie and video laryngoscopy-assisted intubation. Gum-elastic bougie is the easiest and cheapest tool used in case of an unexpected difficult intubation occurring in the operating room. Case: A 53-year-old male patient with hypogonadotropic hypogonadism presented as an unexpected difficult intubation after the induction of anesthesia. No pathological finding or predictor of difficult intubation was present. In addition, bag-mask ventilation was poor and inadequate. The patient was finally successfully intubated with a gum-elastic bougie. Conclusion: A difficult airway has been described in patients with a variety of endocrine disorders, including pituitary diseases, but not with hypogonadism. There may be an unrevealed relationship between hypogonadism and difficult airway. Gum-elastic bougie is still the most attainable and effective tool in the operation room in this situation. Keywords: airway management, intubation, hypogonadism

Published
2014

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