著者

大田 ゆかり 秦田 勇二

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.20, no.4, pp.354-361, 2010 (Released:2010-12-11)

参考文献数

14

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Deep-sea microorganisms have a wide variety of useful and undiscovered enzymes for their survival in extreme environment. In this article, recent advances in the fundamental and applied researches on several recalcitrant seaweed polysaccharide degrading enzymes, which are newly obtained from the deep-sea bacteria, were described. The enzymes hydrolyze the backbone of the polysaccharides such as agarose and carrageenans to produce various oligosaccharides with great potentials for our health promotion. Furthermore, owing to the unique and profitable properties of the enzymes, they are used as powerful tools for researches in molecular biology and food analysis.

著者

福岡 宏

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.24, no.3, pp.195-203, 2014 (Released:2014-09-18)

参考文献数

17

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In this article, I introduced some new metallic germanides with electropositive elements. Those compounds have covalent Ge networks such as a three dimensional tunnel structure (LaGe5), one dimensional chains of face-shared elongated Ge6 octahedra (BaGe3), and discrete Ge3 triangle units (LaGe3). The germanides showed some characteristics of Zintl type compounds, but the electrical resistivity measurements revealed that they were metallic. I made a comparison between those metallic compounds and classical Zintl phases. The electronic structures of the metallic germanides were discussed in terms of the orbital interaction between host (germanium) and guest (electropositive elements) atoms.

著者

田村 勝弘

出版者

The Japan Society of High Pressure Science and Technology

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.3, no.2, pp.142-149, 1994-05-20 (Released:2010-02-05)

参考文献数

22

被引用文献数

1 1

---

Recent studies on behaviors of Escherichia coli and yeast at 10- 40 MPa where these microorganisms can survive were summarized. The aspects covered are, 1) abnormal elongation of Escherichia coli cell by application of high pressure, 2) correlation between hydrophobicity of the cell surface of E. coli and drug susceptibility under high pressure, 3) stress response of yeast (induction of various tolerance by heat shock and drug shock in yeast), and 4) pressure reversal of alcohol effects on the growth of yeast and its application to alcoholic fermentation under high pressure.

著者

秋葉 和人 徳永 将史

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.30, no.4, pp.260-273, 2020 (Released:2021-04-23)

参考文献数

38

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In this article, we review our exploration of unconventional electronic states near the metal-insulator boundary in black phosphorus and lead telluride, which have long been known as narrow-gap semiconductors with simple crystal structure. In such low carrier systems with high mobility, the energy band structure and physical property can be drastically affected by application of high magnetic field and high pressure. High pressure is a powerful tool to continuously tune the band structure from semiconductor to semimetal without degradation of the mobility.

著者

伊賀 文俊 松浦 航 加賀山 朋子 水戸 毅

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.30, no.4, pp.298-308, 2020 (Released:2021-04-23)

参考文献数

30

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In this article, recent topics in the high-pressure synthesis and physical properties under high pressure circumstance on Topological Kondo Insulators SmB6 and YbB12 were reviewed. As for high pressure synthesis of substitution by Ca for YbB12, high-pressure equipment using the Walker module is introduced. This equipment is used for material development of novel RB12. Furthermore some physical properties of SmB6 and YbB12 under high pressure condition are also introduced.

著者

黒澤 耕介 小松 吾郎 薮田 ひかる 森脇 涼太 岡本 尚也 佐久間 博 松井 孝典

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.31, no.3, pp.140-148, 2021 (Released:2022-02-10)

参考文献数

29

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In this article we first review the roles of hypervelocity impacts in volatile partitioning on planetary surfaces and thermodynamics of shock vaporization/devolatilization of geologic materials. Impact experiment in an open system is essential to accurately estimate the shock pressure required for incipient vaporization/devolatilization, and we introduce a newly-developed open system experimental technique applied to two-stage light gas guns. This experimental apparatus allows us to measure impact-generated gases with a mass spectrometer at the same geometry of natural impacts with a limited risk of chemical contamination from the gun operation. The threshold pressures of vaporization/devolatilization for halite and gypsum were measured to be 18-31 GPa and <11 GPa, respectively. The new open system method is expected to serve as a powerful tool to explore the nature of shock vaporization/devolatilization of geologic materials.

著者

竹村 謙一

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.2, no.1, pp.84-85, 1993

被引用文献数

2

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Recent development of the diamond-anvil-cell technology has made it possible to generate ultrahigh pressures exceeding 100GPa with the use of the beveled diamond anvils. Since the sample size for such studies decreases to about 50&mu;m, it requires special devices and techniques for the sample preparation like a microdrilling machine.

著者

後藤 元信

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.25, no.3, pp.234-238, 2015 (Released:2015-09-17)

参考文献数

19

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Extraction processes using pressurized fluid of mixture of carbon dioxide and water or organic solvent are reviewed. Gas-expanded liquid has been used for separation and material processing where liquid solvent is expanded by dissolving carbon dioxide at high pressure. Hybrid process using multi-phase fluid of liquid and supercritical fluid is developed and applied to natural material extraction.

著者

榮永 茉利

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.31, no.2, pp.112-121, 2021 (Released:2021-10-27)

参考文献数

42

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The recent collaboration between theory and experiment has led to the discovery of high-Tc superconductive hydrogen dominant compounds under ultra-high pressure over one million atmospheres which can be attained by the recent advances in technology using diamond anvil cell. Although there are still various difficulties in measuring the physical properties of materials under ultra-high pressure, high-pressure is expected as an important parameter for development of novel functional materials and search for physical properties, which cannot be realized at ambient pressure. In this article, I review the recent results on the search for pressure-induced superconductivity in sulfur hydride system.

著者

大谷 栄治

出版者

The Japan Society of High Pressure Science and Technology

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.3, no.1, pp.12-18, 1994-02-20 (Released:2009-08-07)

参考文献数

12

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Interior of the Earth and planets is one of the most important targets for the high pressure research. In this paper, gross pictures on the layered structure, chemical compositions, and the pressure and temperature conditions of the Earth interior are presented. Some topics on the high pressure research relevant to the Earth interior are also reviewed.

著者

井上 徹

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.14, no.3, pp.242-247, 2004 (Released:2004-12-10)

参考文献数

26

被引用文献数

2 2

---

Water is the most abundant volatile component on the Earth's surface, and it is important to clarify the water distribution in the Earth's interior because water influences the physical properties and melting temperature of minerals. Here the author reviews our recent works about the H2O partitioning among high-pressure polymorphs of olivine. Based on the partitioning results combining with the seismological constraint, the author discusses the amount of water distribution in the Earth's interior.

著者

崔 亨波 Alimamy Forkie BANGURA 加藤 礼三

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.25, no.4, pp.292-297, 2015 (Released:2016-01-08)

参考文献数

14

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In this article, a modified technique using diamond anvil cell (DAC) for four-probe resistivity measurement is introduced. The full detail of sample mounting technique in a DAC is described. We performed high-pressure transport measurements for a Mott insulator β′-ET2ICl2 up to 12 GPa. By comparing the result obtained by the cubic anvil cell measurement, we proved that a choice of small culet size, small samples, and encapsulating the sample provides high quality hydrostatic pressure in DAC.

著者

野口 琢史

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.19, no.4, pp.275-280, 2009 (Released:2009-12-02)

参考文献数

9

被引用文献数

1 1

---

Such as high pressure machine, it has image difficult to use and dangerous in generally, dose not gain in popularity. In particular over 100 MPa, that is the filed of super high-pressure, there were still many researches carried out on the super high-pressure, however there were few products that is commodification in the world. In this paper, developing machine is easy to use the super high-pressure and technology is utilized super high-pressure of the versatility, therefore commodification shows several possible of super high-pressure.

著者

前川 明紀

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.29, no.1, pp.16-21, 2019 (Released:2019-04-10)

参考文献数

4

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The study of high-pressure processing (HPP) technology started in Japan in the 1980s as a non-thermal pasteurization method and practical applications have since been developed. However, HPP technology was not popular then. These days it is getting more popular among Japanese food companies, so to meet the demand we developed horizontal cold isostatic pressing (CIP) equipment called ‘FOOD FRESHER’ based on our knowledge of making high pressure equipment for more than 50 years. This paper describes the recent trends in the HPP market and the specifications of FOOD FRESHER both as it is now, and as it will be in the future.

著者

佐野 亜沙美 伊藤 正一 鈴村 明政 上野 雄一郎 八木 晃 井上 徹 川添 貴章

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.30, no.2, pp.85-94, 2020 (Released:2020-10-23)

参考文献数

39

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Minerals and rocks exhibit various isotope compositions depending on their origins and histories. In interpreting their isotopic variations, the equilibrium isotope fractionation factor is a key because it depends on the environment parameters such as temperature. Recent studies have shown that the effect of pressure on the isotope fractionation, which was considered negligible compared to temperature, is significant under the conditions of the Earth's interior. In this article we review recent advances in experimental studies to determine the isotope fractionation of iron and hydrogen at high pressure over several GPa, discussing their issues and future perspectives.

著者

小林 寿夫

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.23, no.3, pp.260-267, 2013 (Released:2013-09-26)

参考文献数

13

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The nuclear resonant scattering and Mössbauer spectroscopy are going to be the experimental technique to investigate the element-specific electronic and vibrational properties in materials under multi-extreme conditions by using synchrotron radiation as an excitation source for a Mössbauer isotope. In this article, I introduced the basic principles of nuclear resonant scattering and Mössbauer spectroscopy and reviewed these current statuses in material science. Finally, I described future prospects of these methods using shorter-pulsed structure and higher-brilliance Xrays from new-generation synchrotron radiation facilities.

著者

清水 克哉

出版者

The Japan Society of High Pressure Science and Technology

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.10, no.3, pp.194-199, 2000-08-20 (Released:2009-08-07)

参考文献数

11

被引用文献数

1 1

---

Oxygen is popular but unique among diatomic molecules in that it behaves magnetically at low temperature. Under high pressure, however, we expect the insulator-metal transition. This expectation has been suggested by measuring its optical reflectivity[1] under high pressures around 95 GPa (1 Mbar). A new structural transition[2] is considered to be accompanied by metallization. Obviously, the most direct method of detecting metallization is to measure the electrical resistance. We measured the resistance of oxygen at pressures of over 100 GPa[3] and identified the metallic state from a change in the slope of dR/dT. In this paper, we present our findings on the superconducting transition of oxygen under high pressures of around 100 GPa and at temperatures of under 0. 6 K. The superconducting transition is indicated by a drop in resistance. We confirmed this by observing the magnetic field dependence of the drop and by detecting the Meissner demagnetization signal.

著者

梅本 幸一郎

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.27, no.3, pp.205-212, 2017 (Released:2017-10-06)

参考文献数

25

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In this article, we review a series of first-principles studies of phase transitions in earth/planet-forming materials under ultrahigh pressure which corresponds to deep interiors of super-Earths and is difficult to be achieved by diamond-anvil-cell experiments. As examples, we discuss dissociations of MgSiO3 post-perovskite and novel crystalline phases of SiO2 and Al2O3 under ultrahigh pressures. The methods shown in this article are general and can be applied to any structural phase transitions.

著者

栗田 伸之

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.17, no.4, pp.347-351, 2007-11-20 (Released:2007-12-23)

参考文献数

13

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In this article, the contents of my doctoral thesis are briefly reviewed. I have developed 10 GPa class micro diamond anvil cell (DAC) in order to investigate high-pressure effect on filled skutterudite compounds. In addition, a way of setting up for high-pressure resistivity measurements using a four-probe method was established. Here, I focus on the heavy fermion superconductor PrOs4Sb12 and present pressure and magnetic field effects on the electrical resistivity by using the newly developed DAC with pressures up to 10 GPa.

著者

三島 修

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.17, no.4, pp.352-356, 2007-11-20 (Released:2007-12-23)

参考文献数

21

被引用文献数

2 1

---

According to the liquid-liquid critical point hypothesis of water, liquid water separates into low- and high-density liquid phases at low temperature and high pressure, and these liquid phases become the known low- and high-density amorphous ices below their glass transition temperatures. An accumulation of experimental and theoretical results seems to support this hypothesis, and this hypothesis may virtually explain "the mysteries of water" including the density maximum at 277 K. Aqueous solutions and the confined water appear to be readily interpreted on the hypothesis.