京都市左京区下鴨森本町 15 (財)生産開発科学研究所内
日本高圧力学会事務局
Tel (075)721-0376 Fax (075)723-9629
koatsu@mbox.kyoto-inet.or.jp| 特集-圧力誘起分子解離の最前線 Rev. High Pressure Sci. Technol. 5-3,137-142(1996) |
| シアノ化合物の相転移と固相重合反応 Phase Transition and Chemical Reaction in Cyanide |
| 青木 勝敏、 山脇 浩 Katsutoshi AOKI Hiroshi YAMAWAKI |
| Cyanides tend to form linear chains of molecules
in solid, which are tightly bonded by strong
intermolecular interactions due to highly
polar cyano group; they are hydrogen bonding
and dipole-dipole interactions. Hydrogen
cyanide and acetonitrile are prototypes of
cyanides, showing characteristic structural
phase transitions under pressure with rearrangement
of linearly aligned molecules. Vibrational
spectral study of the phase transition and
chemical reaction in cyanides are reviewed. [cyanide, Raman spectra, infrared spectra, DAC, phase transition, chemical reaction] |
| 〒305-8565 つくば市東1-1 物質工学工業技術研究所 National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305-8565 |
| 特集-圧力誘起分子解離の最前線 Rev. High Pressure Sci. Technol. 5-3,143-149(1996) |
| VI族元素の圧力誘起分子解離：固体酸素のラマン分光 Pressure-induced Molecular Dissociation in VIb Elements, O, S, Se, and Te: Raman Spectroscopy of Solid Oxygen |
| 赤浜 裕一 川村 春樹 Yuichi AKAHAMA Haruki KAWAMURA |
| High-pressure Raman spectroscopy of solid
oxygen has been carried out at room temperature
up to 110 GPa in order to study the recently
observed structural phase transition at 96
GPa. The vibron and lattice phonons of ε-phase
corresponding to the transition became undetectable
although the vibron wavenumber in ε-phase
has shown a line pressure dependence with
a coefficient of 2.33 cm-1/GPa and reached 1753 cm-1 at 94 GPa. This result pyoyided evidence
that the structural transition is accompanied
by a insulator-metal transition. The results
have been discussed with a view to molecular
dissociation comparing with those of the
other VIb elemental materials. [oxygen, sulfur, selenium, tellurium, high pressure, molecular dissociation, phase transition, metallization,] |
| 〒678-1297 兵庫県赤穂郡上郡町光都3-2-1 姫路工業大学理学部物質科学科 Department of Material Science, Faculty of Science, Himeji Institute of Technology, 3-2-1, Kouto, Kamigohri, Hyogo 678-1297 |
| 特集-圧力誘起分子解離の最前線 Rev. High Pressure Sci. Technol. 5-3,150-155(1996) |
| 希ガス固体の金属化実験 Experiments on the Matellization of Rare Gas Solids under High Pressure |
| 竹村謙一 Takemura Kenichi |
| Experimental aspects of pressure-induced
metallization and structural change of rare
gas solids are reviewed. The metallization
process of xenon, which has been extensively
investigated through optical measurements,
is described in more detail as an example. [rare gas solids, DAC, metallization] |
| 〒305-0044 つくば市並木1-1 無機材質研究所 National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305-0044 |
| 特集-圧力誘起分子解離の最前線 Rev. High Pressure Sci. Technol. 5-3,156-162(1996) |
| 固体ハロゲンの分子解離相転移と金属化 Molecular Dissociation and Metallization of Solid Halogens |
| 藤久祐司1 藤井保彦2 竹村謙一3 下村理4 青木勝敏1 Hiroshi FUJIHISA Yasuhiko FUJII Kenichi TAKEMURA Osamu SHIMOMURA Katsutoshi AOKI |
| This article reviews our recent x-ray studies
on solid halogens under high pressure. We
found an empirical scaling rule including
atomic coordinates for iodine and bromine.
By applying the Herzfeld criterion, we also
found a scaling rule for the metallization
process prior to molecular dissociation.
The Maximum Entropy Method was employed to
analyze the powder diffraction data and obtain
the electron density map in solid iodine
at pressures up to 20 GPa. The electron density
between adjacent iodine molecules is shown
to form a two-dimensional network around
16 GPa in association with metallization. [halogen, molecular dissociation, phase transition, metallization, electron density, MEM] |
| 1〒305-8565 つくば市東1-1 物質工学工業技術研究所（極限反応部高圧化学グループ） National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba, Ibaraki 305-8565 2〒319-1106 茨城県那珂郡東海村白方106-1 東京大学物性研究所中性子散乱研究施設 Neutron Scattering Laboratory, ISSP, Univ of Tokyo, Tokai, Nakagun, Ibaraki 319-1106 3〒305-0044 つくば市並木1-1 無機材質研究所 National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305-0044 4〒679-5148 兵庫県佐用郡三日月町光都1-1-1 日本原子力研究所関西研究所放射光利用研究センター 1-1-1、kouto, mikadukicho, sayougun,hyogo 679-5148 |
| 特集-圧力誘起分子解離の最前線 Rev. High Pressure Sci. Technol. 5-3,163-167(1996) |
| 分子性結晶の分子解離と金属化 Pressure-Induced Dissociation and Metallization of Molecular Crystals |
| 浜 重一朗 Juichiro HAMA |
| The pressure-induced dissociation and metallization
of molecular crystals are reviewed from theoretical
point of view with particular references
to ice and solid hydrogen. The problem on
the presence of the symmetric hydrogen-bond
phase of ice (ice X) is discussed and the
reason why the theoretical metallization
pressure of ice is very high in comparison
with other molecular solids is predicated.
The present theoretical aspect on the assumed
molecular metallic phase of hydrogen is also
discussed briefly. [symmetric hydrogen-bond, metallization, local density approximation, band structure] |
| 〒560-8531 豊中市待兼山町1-3 大阪大学大学院基礎工学研究科物性物理 Faculty of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka |
| 論文 Rev. High Pressure Sci. Technol. 5-3,168-178(1996) |
| 高圧処理を施した浸漬米の炊飯後の微細構造と物性 Physical Properties and Fine Structure of Grains of High-Pressure-Treated Rice after Cooking |
| 山崎 彬 杵淵美倭子 山本和弘 山田明文 Akira YAMAZAKI Miwako KINEFUCHI Kzuhiro YAMAMOTO Akifumi YAMADA |
| The rice grains (Oryza sativa L.Japonica, cultivar Koshihikari) harvested in Niigata
prefecture in 1994 was soaked in water, and
subjected to high pressure treatment at 400
MPa for 10 min. The rice thus high-pressure-treated
was then boiled for cooking. The physical
properties of the cooked rice were compared
with those of a control rice with respect
to the hardness, stickiness and conductivity
immediately after cooking, and also with
respect to those with time during the storage.
The high-pressure-treated rice exhibited
higher stickiness than the control rice immediately
after cooking, but it became harder than
the control rice the next day. Furthermore,
the high-pressure-treated rice exhibited
higher conductivity immediately after cooking
than the control rice, and the conductivity
increased with time during the storage. Scanning
electron micrographs (SEM) indicated that
the grains of the high-pressure-treated rice
were swollen by the high pressure treatment,
with water effectively penetrating into the
peripheral portion of each starch granule,
and when such rice was cooked, deep vacant
holes and thick walls of starch gel were
formed in each grain. It has been confirmed
that the rice subjected to such high pressure
treatment, when cooked, is tasty even after
becoming hard with time during storage. [high pressure treatment, cooked rice, tensipresser, conductivity, SEM] |
| 〒940-0056 長岡市呉服町1-4-5 越後製菓（株）総合研究所社長室 Research Institute, Echigo Seika Co.,Ltd., 1-4-5 Gohukucho, Nagaoka 940-0056 |
| 実験ワンポイント Rev. High Pressure Sci. Technol. 5-3,179-183(1996) |
| 水熱化学実験法 Experimental Technique for Hydrothermal Chemistry |
| 山崎仲道 Nakamichi YAMAZAKI |
| Various mini-autoclaves for hydrothermal
reactions are introduced. Accessary processes
such are electrode, gas-pressuring, ball
milling, phase separation and others under
hydrothermal conditions are shown for originarity
for hydrothermal research. [hydrothermal, autoclave, reaction field] |
| 〒769-1103 香川県三豊群詫間町香田80 神島化学工業（株）技術開発本部 Kouda80, Takuma-cho, Sanhougun, Kagawa 769-1103 |
〒606-0805
京都市左京区下鴨森本町 15 (財)生産開発科学研究所内
日本高圧力学会事務局
Tel (075)721-0376 Fax (075)723-9629