EHPRG

Welcome to the official website of the European High Pressure Research Group (EHPRG).

EHPRG is non-profitable academic association established in 1963 which is devoted to science and technology of matter under high pressure. It organizes an annual meeting which brings together hundreds of scientists of various fields, mainly physics, chemistry, Earth and planetary sciences, bio- and food science and technology.

The reasonable size of the group, low conference fees, and a friendly relationship between the attendants have made EHPRG meetings a major event in the European high-pressure community for more than half a century.

Selection of high-pressure related titles from top scientific journals.

Fickian and thermal diffusion coefficients of binary mixtures of isobutylbenzene and n-alkanes at different concentrations from the optical beam deflection technique
by Filipe Arantes Furtado
The Journal of Chemical Physics, Volume 151, Issue 2, July 2019.
We report the Fickian diffusion (D12), thermal diffusion (DT), and Soret (ST) coefficients of 4 binary mixtures of isobutylbenzene (IBB) and n-alkanes (n-hexane, n-octane, n-decane, and n-dodecane) at 298.15 K and atmospheric pressure. The concentration is varied in the whole range. The Optical Beam Deflection technique is used in the measurements. We first verify our measurements with published data. The concepts of molecular similarity and mobility are invoked to investigate D12 and DT dependency on molecular weight and concentration. Our analysis reveals a combined effect of molecular mobility and similarity dependency of DT on concentration and molecular weight of the n-alkanes. The mobility of individual molecules describes the D12 dependency on concentration and molecular weight of alkanes. The dependency of D12 on concentration weakens as the n-alkane molecular weight increases. DT increases with IBB concentration for nC6 and nC8 and decreases with IBB concentration for nC10 and nC12. In this work, we demonstrate that the temperature contrast factors can be accurately estimated without the use of an interferometer.
11 Jul 2019 at 5:03am
Homogeneous nucleation of ferroelectric ice crystal driven by spontaneous dipolar ordering in supercooled TIP5P water
by Rui Shi
The Journal of Chemical Physics, Volume 151, Issue 2, July 2019.
Recently, it has been revealed that a supercooled liquid below the melting point has intrinsic structural heterogeneity due to local structural ordering as a manifestation of many-body correlations. The impact of such preordering on crystal nucleation has recently attracted considerable attention. In this work, by extensive molecular dynamics simulations of TIP5P water, we find a two-step homogeneous nucleation of a ferroelectric ice crystal: the first step is spontaneous dipolar ordering, i.e., paraelectric-to-ferroelectric transition, in a supercooled liquid state and the second step is the nucleation of the ferroelectric ice crystal selectively in the preordered regions. We reveal that in this system the dipole-dipole correlation grows rapidly with an increase in pressure, eventually leading to spontaneous dipolar ordering at a certain condition (e.g., at 2000 bars and 227 K). This result is obtained by simulations of TIP5P water with a simple cutoff of Coulomb interactions. By comparing this result with those of the particle-mesh Ewald and reaction field treatments of the Coulomb interactions, we find that the potential cutoff significantly enhances the dipole-dipole correlation, resulting in the fast ice nucleation to the ferroelectric cubic form. Despite the unrealistic enhancement of dipolar correlation in this model, this work provides an intriguing physical scenario of two-step crystal nucleation in polar molecules assisted by dipolar orientational ordering, which may be relevant to crystallizations, e.g., under an external electric field, on a charged surface, or under extreme conditions.
9 Jul 2019 at 5:27am
Low-temperature hydrogen-graphite system revisited: Experimental study and Monte Carlo simulation
by Eugene Ustinov
The Journal of Chemical Physics, Volume 151, Issue 2, July 2019.
Hydrogen adsorption by microporous carbon materials attracts much attention for the past few decades, which has been stimulated by growing interest in hydrogen storage. Numerous studies of this topic based on molecular simulation technique have been reported. However, in many cases, the reliability of the results obtained with numerical methods is insufficient, which is a consequence of poor reference data used for fitting parameters of the fluid-fluid and fluid-solid potentials. This study is devoted to a detailed experimental investigation of the hydrogen-graphite system and its modeling with a kinetic Monte Carlo method at temperatures from 20 to 77 K and the bulk pressure from 0.1 Pa to 100 kPa. We found that the best fit of the bulk hydrogen equation of state corresponds to the 10-6 Lennard-Jones potential with the temperature dependent parameters to account for the quantum effects. The experimental hydrogen adsorption isotherms on the graphite surface were fitted with a high accuracy, which constitutes a firm basis of subsequent simulation of hydrogen adsorption in various nanoporous carbons and their pore size distribution analysis using a kernel generated with the developed approach.
11 Jul 2019 at 5:03am
Persistence of Ion Temperature Gradient Turbulent Transport at Finite Normalized Pressure
by A. Ishizawa, D. Urano, Y. Nakamura, S. Maeyama, and T.-H. Watanabe
Author(s): A. Ishizawa, D. Urano, Y. Nakamura, S. Maeyama, and T.-H. Watanabe


Plasma $β$ dependence of electromagnetic turbulent transport is investigated by means of gyrokinetic simulations with self-consistent change of the equilibrium magnetic field. It is found that energy transport due to ion-temperature-gradient (ITG) driven turbulence does not decrease with increasing ...


[Phys. Rev. Lett. 123, 025003] Published Wed Jul 10, 2019
10 Jul 2019 at 12:00pm
Pressure-Induced Hydrogen-Hydrogen Interaction in Metallic FeH Revealed by NMR
by Thomas Meier, Florian Trybel, Saiana Khandarkhaeva, Gerd Steinle-Neumann, Stella Chariton, Timofey Fedotenko, Sylvain Petitgirard, Michael Hanfland, Konstantin Glazyrin, Natalia Dubrovinskaia, and Leonid Dubrovinsky
Author(s): Thomas Meier, Florian Trybel, Saiana Khandarkhaeva, Gerd Steinle-Neumann, Stella Chariton, Timofey Fedotenko, Sylvain Petitgirard, Michael Hanfland, Konstantin Glazyrin, Natalia Dubrovinskaia, and Leonid Dubrovinsky


Nuclear magnetic resonance experiments reveal how the electronic properties of hydrogen in iron hydride change under extreme pressure, a step toward understanding the onset of high-temperature superconductivity in metal hydrides.


[Phys. Rev. X 9, 031008] Published Wed Jul 17, 2019
17 Jul 2019 at 12:00pm
Solids, liquids, and gases under high pressure
by Ho-Kwang Mao, Xiao-Jia Chen, Yang Ding, Bing Li, and Lin Wang
Author(s): Ho-Kwang Mao, Xiao-Jia Chen, Yang Ding, Bing Li, and Lin Wang


The effect of adding high pressure as a control parameter in solids, liquids, and gases expands opportunities to observe unexpected novel phenomena and understand matter in extreme environments. This review on high pressure science highlights subjects ranging from quantum criticality to Earth science. State-of-the-art experimental methods at megabar pressures are also discussed. The proliferation of pressure-induced phases illustrate promising new directions for this field of research.


[Rev. Mod. Phys. 90, 015007] Published Tue Mar 20, 2018
20 Mar 2018 at 11:00am
Colloquium: High pressure and road to room temperature superconductivity
by Lev P. Gor’kov and Vladimir Z. Kresin
Author(s): Lev P. Gor’kov and Vladimir Z. Kresin


Even after three decades of development, high-temperature superconductivity remains one of the most challenging theoretical and experimental areas in condensed matter physics. In this Colloquium some new discoveries in this area are reviewed and possible routes toward much higher transition temperatures are analyzed.


[Rev. Mod. Phys. 90, 011001] Published Tue Jan 09, 2018
9 Jan 2018 at 11:00am
Time-reversal symmetry breaking in topological superconductor ${\mathrm{Sr}}_{0.1}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$
by P. Neha, P. K. Biswas, Tanmoy Das, and S. Patnaik
Author(s): P. Neha, P. K. Biswas, Tanmoy Das, and S. Patnaik


The single helical Fermi surface on the surface state of three-dimensional topological insulator ${\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ is constrained by the time-reversal invariant bulk topology to possess a spin-singlet superconducting pairing symmetry. In fact, the Cu-doped and pressure-tuned super...


[Phys. Rev. Materials 3, 074201] Published Tue Jul 16, 2019
16 Jul 2019 at 12:00pm
High-pressure phase of $\mathrm{CrS}{\mathrm{b}}_{2}$: A new quasi-one-dimensional itinerant magnet with competing interactions
by Y. Y. Jiao, Z. Y. Liu, M. A. McGuire, S. Calder, J.-Q. Yan, B. C. Sales, J. P. Sun, Q. Cui, N. N. Wang, Y. Sui, Y. Uwatoko, B. S. Wang, X. L. Dong, and J.-G. Cheng
Author(s): Y. Y. Jiao, Z. Y. Liu, M. A. McGuire, S. Calder, J.-Q. Yan, B. C. Sales, J. P. Sun, Q. Cui, N. N. Wang, Y. Sui, Y. Uwatoko, B. S. Wang, X. L. Dong, and J.-G. Cheng


We have synthesized the high-pressure form of $\mathrm{CrS}{\mathrm{b}}_{2}$ with $\mathrm{CuA}{\mathrm{l}}_{2}$-type structure under 7 GPa and 700 °C, and characterized its structural, transport, and magnetic properties by a suite of measurement techniques over a broad range of temperature, magneti...


[Phys. Rev. Materials 3, 074404] Published Thu Jul 11, 2019
11 Jul 2019 at 12:00pm
High-pressure synthesis of the $\mathrm{BiV}{\mathrm{O}}_{3}$ perovskite
by R. A. Klein, A. B. Altman, R. J. Saballos, J. P. S. Walsh, A. D. Tamerius, Y. Meng, D. Puggioni, S. D. Jacobsen, J. M. Rondinelli, and D. E. Freedman
Author(s): R. A. Klein, A. B. Altman, R. J. Saballos, J. P. S. Walsh, A. D. Tamerius, Y. Meng, D. Puggioni, S. D. Jacobsen, J. M. Rondinelli, and D. E. Freedman


We report the high-pressure, high-temperature synthesis of $\mathrm{BiV}{\mathrm{O}}_{3}$, a cubic perovskite that thus far has remained inaccessible under ambient pressure conditions. We created this material at $∼25$ GPa and 1500 K in a laser-heated diamond-anvil cell and recovered it to ambient p...


[Phys. Rev. Materials 3, 064411] Published Thu Jun 20, 2019
20 Jun 2019 at 12:00pm
Electronic and vibrational properties of the two-dimensional Mott insulator ${\mathrm{V}}_{0.9}{\mathrm{PS}}_{3}$ under pressure
by Matthew John Coak, Yong-Hyun Kim, Yoo Soo Yi, Suhan Son, Sung Keun Lee, and Je-Geun Park
Author(s): Matthew John Coak, Yong-Hyun Kim, Yoo Soo Yi, Suhan Son, Sung Keun Lee, and Je-Geun Park


We present a Raman spectroscopic study of the layered antiferromagnetic Mott insulator ${\mathrm{V}}_{0.9}{\mathrm{PS}}_{3}$ and demonstrate the evolution of the spectra with applied quasihydrostatic pressure. Clear features in the spectra are seen at the pressures identified as corresponding to a s...


[Phys. Rev. B 100, 035120] Published Fri Jul 19, 2019
19 Jul 2019 at 12:00pm
Effect of agglomeration of magnetic nanoparticles on the Casimir pressure through a ferrofluid
by G. L. Klimchitskaya, V. M. Mostepanenko, and E. N. Velichko
Author(s): G. L. Klimchitskaya, V. M. Mostepanenko, and E. N. Velichko


The impact of agglomeration of magnetic nanoparticles on the Casimir pressure is investigated in the configuration of two material plates and a layer of ferrofluid confined between them. Both cases of similar and dissimilar plates are considered in the framework of the Lifshitz theory of dispersion ...


[Phys. Rev. B 100, 035422] Published Tue Jul 16, 2019
16 Jul 2019 at 12:00pm
Evidence for superconductivity in Rb metal above 55 GPa pressure
by Yuhang Deng and James S. Schilling
Author(s): Yuhang Deng and James S. Schilling


The only alkali metal known to be superconducting at ambient pressure is Li at 0.4 mK. Under 30 GPa pressure ${T}_{\text{c}}$ for Li rises to 14 K. In addition, nearly 50 years ago the heavy alkali metal Cs was reported to become superconducting near 1.3 K at 12 GPa. In the present experiment the su...


[Phys. Rev. B 100, 041109(R)] Published Mon Jul 15, 2019
15 Jul 2019 at 12:00pm
Spin-triplet superconductivity in the paramagnetic UCoGe under pressure studied by $^{59}\mathrm{Co}$ NMR
by Masahiro Manago, Shunsaku Kitagawa, Kenji Ishida, Kazuhiko Deguchi, Noriaki K. Sato, and Tomoo Yamamura
Author(s): Masahiro Manago, Shunsaku Kitagawa, Kenji Ishida, Kazuhiko Deguchi, Noriaki K. Sato, and Tomoo Yamamura


A $^{59}\mathrm{Co}$ nuclear magnetic resonance (NMR) measurement was performed on the single-crystalline ferromagnetic (FM) superconductor UCoGe under a pressure of 1.09 GPa, where the FM state is suppressed and superconductivity occurs in the paramagnetic (PM) state, to study the superconducting (...


[Phys. Rev. B 100, 035203] Published Fri Jul 12, 2019
12 Jul 2019 at 12:00pm
10th International Conference on High Pressure Bioscience and Biotechnology (HPBB2018)
by Fumiyoshi Abe
Volume 39, Issue 2, June 2019, Page 191-192
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22 May 2019 at 4:17am
High pressure studies on the misfolding and aggregation of p53 in cancer and of α-synuclein in Parkinson’s disease
by Guilherme A. P. de Oliveira
Volume 39, Issue 2, June 2019, Page 193-201
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11 Feb 2019 at 6:04am
Pressure-induced structural changes of alanine oligopeptides in aqueous solutions
by Takahiro Takekiyo
Volume 39, Issue 2, June 2019, Page 202-209
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1 Mar 2019 at 6:42am
Molecular chaperone-like properties of sodium caseinate to suppress the pressure-induced aggregation of β-lactoglobulin
by Jin-Song He
Volume 39, Issue 2, June 2019, Page 210-217
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11 Feb 2019 at 6:02am
Quantitative analysis of dissociation of LDH by high pressure native PAGE
by Tomoya Miwa
Volume 39, Issue 2, June 2019, Page 218-224
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11 Jan 2019 at 8:11am
Adaptations for pressure and temperature effects on loop motion in Escherichia coli and Moritella profunda dihydrofolate reductase
by Qi Huang
Volume 39, Issue 2, June 2019, Page 225-237
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5 Mar 2019 at 9:48am
Salt effect on bilayer phase transitions of dipalmitoylphosphatidylglycerol in saline water under high pressure
by Masaki Goto
Volume 39, Issue 2, June 2019, Page 238-247
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4 Apr 2019 at 11:11am
Poly 3-hydroxybutyrate-co-3-hydroxyhexanoate films can be degraded by the deep-sea microbes at high pressure and low temperature conditions
by Chiaki Kato
Volume 39, Issue 2, June 2019, Page 248-257
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1 Mar 2019 at 5:24am
Identification of a regulatory element for yeast tryptophan permease Tat2 ubiquitination using high hydrostatic pressure
by Ryoga Ishii
Volume 39, Issue 2, June 2019, Page 258-266
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1 Feb 2019 at 6:21am
Critical events leading to cellular mortality of yeast cells following hydrostatic pressure treatment
by Kazuhiro Hamada
Volume 39, Issue 2, June 2019, Page 267-272
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9 Dec 2018 at 12:44pm
Critical damage to the cellular organelles of Saccharomyces cerevisiae under sublethal conditions upon high pressure carbon dioxide treatment
by Ukyo Takahashi
Volume 39, Issue 2, June 2019, Page 273-279
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2 May 2019 at 6:40am
High-throughput screening of food additives with synergistic effects on high hydrostatic pressure inactivation of budding yeast
by Akinori Iguchi
Volume 39, Issue 2, June 2019, Page 280-292
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30 Mar 2019 at 10:22am
Pressure tolerance of Artemia cysts compressed in water medium
by Rachael Hazael
Volume 39, Issue 2, June 2019, Page 293-300
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4 Feb 2019 at 10:41am
High hydrostatic pressure pasteurization of a draft sake brewed using a Niigata-sake yeast
by Kazuki Nomura
Volume 39, Issue 2, June 2019, Page 301-312
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30 Mar 2019 at 10:24am
Effect of high hydrostatic pressure on enzyme activity in unpasteurized draft sake
by Toru Shigematsu
Volume 39, Issue 2, June 2019, Page 313-323
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25 Apr 2019 at 3:58am
Listeria monocytogenes cells injured by high hydrostatic pressure and their recovery in nutrient-rich or -free medium during cold storage
by Yoshiko Nakaura
Volume 39, Issue 2, June 2019, Page 324-333
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1 Mar 2019 at 3:10am
Effect of plating and incubation conditions on the detection of lactic acid bacteria after high hydrostatic pressure treatment
by Masato Nakane
Volume 39, Issue 2, June 2019, Page 334-343
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7 Feb 2019 at 5:17am
Evaluation of the effect of high pressure carbon dioxide-pasteurized food on animal health
by Ayane Hibi
Volume 39, Issue 2, June 2019, Page 357-366
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11 Feb 2019 at 6:08am
Conversion of waste meat to resources by enzymatic reaction under high pressure carbon dioxide conditions
by Tonghuan Yu
Volume 39, Issue 2, June 2019, Page 367-373
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19 Mar 2019 at 7:25am
Whey proteins-epicatechin interactions in a model specialized food product treated by high pressure
by Valentin Clion
Volume 39, Issue 2, June 2019, Page 374-384
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2 May 2019 at 4:23am
Effect of high hydrostatic pressure and reducing sodium chloride and phosphate on physicochemical properties of beef gels
by Anastasiia Maksimenko
Volume 39, Issue 2, June 2019, Page 385-397
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4 Mar 2019 at 2:39am
Enrichment of free amino acid content and reduction of astringent taste compounds in soybean by high hydrostatic pressure
by Shigeaki Ueno
Volume 39, Issue 2, June 2019, Page 398-407
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6 Apr 2019 at 12:02pm
The effect of high hydrostatic pressure on taste substance distribution in fresh green tea leaves
by Hsiuming Liu
Volume 39, Issue 2, June 2019, Page 408-416
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25 Apr 2019 at 2:56pm
In-situ X-ray diffraction study on β-CrOOH at high pressure and high-temperature
by Chikara Shito
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17 Jul 2019 at 2:46pm
Ultrahigh pressure equation of state of tantalum to 310 GPa
by Kaleb C. Burrage
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11 Jul 2019 at 8:28am
The usage of high hydrostatic pressure (HHP) to control food-borne pathogens in hummus
by Barbara Sokołowska
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24 Jun 2019 at 12:09pm
Modified Bridgman anvils for high pressure synthesis and neutron scattering
by Bianca Haberl
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17 Jun 2019 at 8:18am
Development of a technique for high pressure neutron diffraction at 40 GPa with a Paris-Edinburgh press
by T. Hattori
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4 Jun 2019 at 6:21am
Effects of high hydrostatic pressure on β-glucan content, swelling power, starch damage, and pasting properties of high-β-glucan barley flour
by Shigeaki Ueno
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29 Mar 2019 at 1:58pm