1-エチルアダマンタンを気相接触反応によって脱水素し, 1-ビニルアダマンタンの合成反応を試みた。アルキルベンゼン類の脱水素反応に有効なFe2O3-K2CO3-Cr2O3などの触媒は, 1-エチルアダマンタンの脱水素反応には活性が乏しかった。CuO-Cr2O3-BaO触媒は分解生成物を多く生成し, 選択性に乏しかった。Cr2O3-Al2O3触媒は活性•選択性ともに良好だったが, 炭素析出による活性劣化が著しかった。反応系に水蒸気を加え, Cr2O3-Al2O3-K2CO3触媒を用いることによって、活性を持続させ収率を向上することができた。

10.1627/jpi1958.35.487

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Citations (1)

Structure Analysis of ZnS-SiO2 Thin Film and Patterning by Heat-Mode Lithography

Hiroshi Miura Noriyuki Iwata Nobuaki Toyoshima Yoshitaka Hayashi Koji Takeuchi

A tetrahedral network structure like ZnS crystal is found to exist in the amorphous ZnS-SiO ₂ thin film. It is considered that the etching selectivity in as-deposited and annealed ZnS-SiO ₂ thin film becomes large due to the growth of ZnS crystals by annealing. There is optimum mixture rate of ZnS for patterning of Zns-SiO ₂ thin film by the heat-mode lithography, and the ZnS-SiO ₂ dots with clear and smooth edges were formed with increasing in the ZnS mixture rate to 80%

10.1109/ods.2006.1632741

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Citations (2)

A CASE OF CARCINOMA OF THE SIGMOID COLON APPEARING DIFFUSELY INFILTRATING CARCINOMA

Acta gastro-enterologica belgica (1994)

Hiroshi Mieno Hirokazu Goishi Nobuyuki Asada Tsutao Okamoto Kazufumi Sakanoue

Colon carcinoma

Sigmoid function

10.11280/gee1973b.36.412

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Citations (1)

Effects of CD pressure variations on coat-weight nonuniformities

Cyrus K. Aidun Hiroshi Miura

Coat

Source

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Citations (0)

Keyhole bottom separation in two beam Nd–YAG laser welding

Science and Technology of Welding & Joining (1999)

Toru Narikiyo Hiroshi Miura Shigeki Fujinaga Hideaki Takenaka Akio Ohmori

A pair of Nd–YAG laser beams transmitted through optical fibres from two oscillators have been condensed separately and combined at a single point on the workpiece in order to enhance welding ability. Bead on plate tests were carried out with symmetric arrangements of condensing optics in two different welding directions. Transition from penetration with one keyhole bottom to penetration with two bottoms occurred as the laser power increased when the angles of incidence of the laser beams were 30 or 45°. No transition occurred at 15°. Melting efficiency increased dramatically at the transition power, the transition conditions being determined by laser power and heat input.

Keyhole

Penetration (warfare)

10.1179/136217199101537914

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Citations (6)

Two severe cases of acute renal failure induced by mamushi viper venom.

Journal of Japanese Society for Dialysis Therapy (1991)

Hiroshi Miura Keiko Hayano Yoshito Inobe Hiroyoshi Fukui

マムシ咬傷による横紋筋融解症から急性腎不全を来たし, 救命し得たもののDIC, 消化管出血等の合併症を伴って重篤な経過を辿った2症例を報告する. 両症例共に受傷後, 広汎な局所病変を呈し, 入院時検査においてBUN, creatinineの上昇と共にLDH, CPKなどの筋由来酵素群の上昇がみられ, さらに血中, 尿中のmyoglobinの高値も認めたことから, rhabdomyolysisによる急性腎不全を発症したと考えられた. 症例1は蛇毒中の血液凝固因子の作用によりDICを併発したことから, また症例2は大量の消化管出血を伴ったことから, いずれも重篤な経過を辿った. 局所病変の強いマムシ咬傷例は, 重篤な合併症に注意して診療にあたるべきと思われた.

VIPeR

Viper Venoms

Viperidae

10.4009/jsdt1985.24.651

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Citations (2)

Effect of residual Cl− derived from metal precursors on catalytic activity in the hydrogenation of naphthalene over supported Pd catalysts

Catalysis Communications (2002)

Koki Ito Masa–aki Ohshima H. Kurokawa Kazuo Sugiyama Hiroshi Miura

10.1016/s1566-7367(02)00207-8

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Citations (14)

Integration of three high power Nd–YAG lasers to one beam and its application in stainless steel welding

Science and Technology of Welding & Joining (1999)

Shigeki Fujinaga Hiroshi Miura Toru Narikiyo S. Katayama A. Ohmori

An Nd–YAG laser processing system has been developed in which the beams of three Nd–YAG lasers (two 2·0 kW continuous wave oscillators and one 1·5 kW pulsed oscillator) were combined at the input end of a single optical fibre and transmitted through the optical fibre. The power distribution of the integrated beam, even at the defocused point of the processing optics, was not split between the three beams. Complex pulse waveform control was therefore possible. The effect of the waveforms on penetration depth was examined. Penetration depth for the rectangular modulated laser beam superimposed on the pulse laser beam with a delay was deeper than that for the rectangular modulated laser beam and the continuous laser beam, even under the same average power condition. The effective delay was 1–3 ms. Deepest penetration depth for the rectangular modulated laser beam superimposed on the pulse laser beam was 1·7 times that for the continuous laser beam.

Beam parameter product

Continuous wave

M squared

10.1179/136217199101538021

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Selective hydrogenation of aldehyde groups in various α,β-unsaturated aldehydes over alumina-supported cobalt (0) catalyst

Applied Catalysis A General (1999)

Chie Ando H. Kurokawa Hiroshi Miura

Crotonaldehyde

Acrolein

10.1016/s0926-860x(99)00142-8

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Citations (50)