Yuji Konno

ORCID: 0000-0002-5056-0183
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • X-ray Diffraction in Crystallography
  • Crystallization and Solubility Studies
  • Helicobacter pylori-related gastroenterology studies
  • Iron-based superconductors research
  • Rare-earth and actinide compounds
  • Esophageal and GI Pathology
  • Microstructure and Mechanical Properties of Steels
  • Metal Alloys Wear and Properties
  • Metal-Organic Frameworks: Synthesis and Applications
  • Solid State Laser Technologies
  • Laser Design and Applications
  • Metallurgy and Material Forming
  • Musculoskeletal pain and rehabilitation
  • Laser-induced spectroscopy and plasma
  • Optical and Acousto-Optic Technologies
  • Inorganic Chemistry and Materials
  • Conducting polymers and applications
  • Crystallography and molecular interactions
  • Digestive system and related health
  • Lanthanide and Transition Metal Complexes
  • Carbon Nanotubes in Composites
  • Advanced Sensor Technologies Research
  • Heart Rate Variability and Autonomic Control
  • Intestinal and Peritoneal Adhesions
  • Spectroscopy and Laser Applications

Tohoku University
1982-2022

Nippon Steel (Japan)
2020-2021

Yamagata City Hospital Saiseikan
2015-2016

Nara Institute of Science and Technology
2015

National Institute of Technology, Asahikawa College
2012-2013

Tokyo University of Science
2005

Muroran Institute of Technology
1998-2000

Nagoya University
1994

Nihon Dempa Kogyo (Japan)
1977

A chameleon luminophore: temperature-sensing material is reported that has a high thermostability (see picture). The composed of color-changing luminescent coordination polymers containing EuIII and TbIII ions. polymer exhibits emission quantum yield Φ 40 % at room temperature ability over wide range 200–500 K.

10.1002/anie.201301448 article EN Angewandte Chemie International Edition 2013-05-03

The significance of heart-rate turbulence (HRT) in patients with chronic heart failure (CHF) was evaluated to examine whether it is sensitive the risk ventricular tachycardia (VT). HRT reported predict prognosis after myocardial infarction (MI), but its prognostic value CHF remains unknown. measured 50 (left ejection fraction <50% and/or left end-diastolic diameter >55 mm, 34 cardiomyopathy, 16 post-MI) and 21 without obvious diseases (control). slope onset were by original definitions using...

10.1253/circj.66.902 article EN Circulation Journal 2002-01-01

Ein Chamäleon-Luminophor: Wärmefühler mit einer hohen Wärmestabilität wurde hergestellt (siehe Bild). Das Material besteht aus farbverändernden lumineszierenden Koordinationspolymeren, die EuIII- und TbIII-Ionen enthalten. Koordinationspolymer zeigt bei Raumtemperatur eine Emissionsquantenausbeute Φ von 40 % dient im Bereich 200–500 K als Wärmefühler.

10.1002/ange.201301448 article DE Angewandte Chemie 2013-05-02

The current reperfusion strategy in Japan for acute myocardial infarction (AMI) is that the majority of early arrival patients are treated with primary percutaneous coronary intervention (PCI). However, efficacy PCI, intravenous thrombolysis (IV-T), intracoronary (IC-T) and rescue PCI has not been compared clinical situation. In present study, 3,258 cases AMI 1992-2000 from data base Miyagi Study Group were analyzed. These hospitalized within 6 h onset symptoms. IV-T IC-T initially performed...

10.1253/circj.67.209 article EN Circulation Journal 2003-01-01

The study was designed to characterize patients with chronic heart failure (CHF) in Japan terms of the etiologies and prognosis. CHF defined by ejection fraction (EF ≥50%), left ventricular diastolic dimension (LVDD ≥55 mm) or a past history congestive failure. Among 721 recruited patients, most frequent etiology for dilated cardiomyopathy (DCM) aged less than 59 years, valvular disease (VHD) those 70 years more. 1-year crude mortality 8% overall 12% myocardial infarction (MI). Sudden death...

10.1253/circj.67.431 article EN Circulation Journal 2003-01-01

Abstract Using a wedge-type cubic-anvil high-pressure apparatus, equiatomic Ru compounds HfRuP and ZrRuX (X = P, As, Si or Ge) with layered structures have been prepared at high temperatures pressures. The super-conducting transition teinperatures T c of these were 12 K for HfRuP, 13 ZrRuP, 11.5K ZrRuAs, 12.2 ZrRuSi 10.5 ZrRuGe. electrical resistivities ternary measured as functions applied magnetic field low temperatures. upper critical fields H c2 ZrRuGe are 14, 16, 14.1, 14.5 8.3...

10.1080/13642819908205748 article EN Philosophical Magazine B 1999-05-01

Mid-infrared radiation in the 5-18-mum range has been obtained by difference frequency generation a AgGaSe(2) crystal pumping with output of type I LiNbO(3) optical parametric oscillator (OPO). Here we suggest use LiTaO(3) retarder to achieve an orthogonal state polarization between OPO outputs that are necessary for efficient crystal. Several tens kilowatts peak power near 8 mum and continuously tunable operation above have obtained.

10.1364/ao.37.001642 article EN Applied Optics 1998-03-20

High-speed steel cast-iron rolls were developed around 1990 and have been widely used for the earlier stand of hot strip mills. However, later mills, use high-speed has limited due to insufficient crack resistance. Therefore, in order improve wear resistance stand, enhanced indefinite chilled which MC-type carbides high hardness are crystallized a conventional roll developed. since is significantly inferior that roll, development new cast iron with superior applicable mills was studied. The...

10.2355/isijinternational.isijint-2021-127 article EN cc-by-nc-nd ISIJ International 2021-08-13

High-speed steel type cast iron rolls (HSS-rolls) used in the hot rolling process of are composite manufactured by CPC method or centrifugal casting (CCM). Comparing two, HSS-roll is advantageous terms production cost, and since shaft material ductile iron, thermal crown during small, plate threading property excellent. For this reason, Centrifugal HSS-rolls often as standard HSS-rolls, some them also later stands strip mills. On other hand, forged for CPC-HSS-rolls, strength superior to...

10.2320/matertrans.f-m2020841 article EN MATERIALS TRANSACTIONS 2020-08-20

Effect of sidewall carboxylation on protein adsorption behavior multi-walled carbon nanotubes (MWCNTs) was studied. Two water-soluble proteins, bovine serum albumin (BSA) and egg white lysozyme (LYS), were employed in this work. Carboxylation MWCNTs suppressed BSA, whereas LYS enhanced by the carboxylation. These behaviors are explained difference dominance hydrophobic interaction ionic between proteins.

10.1166/jnn.2014.8590 article EN Journal of Nanoscience and Nanotechnology 2014-02-08

We investigated the relationship between 'the thermodynamic stability and Li content in crystal structure of orthorhombic LiMn1-xMxO2(M = Mn, Al, Cu). The enthalpy change for mol atoms reaction, ΔHR, were calculated from heat dissolution. ΔHR increased with decreasing except two-phase region significantly each sample. For same content, LixMnO2 sample obtained by reflux heating was more thermodynamically stable than other samples. Furthermore, LixMn0.95Al0.05O2 unstable, LixMn0.95Cu0.05O2...

10.5796/electrochemistry.73.823 article EN Electrochemistry 2005-09-05

Ground-state O atoms in oxygen plasma have been detected by means of two-photon laser-induced fluorescence at 226 nm. A calibration method for obtaining the absolute atom density was established, using produced photodissociation molecular with nm photons. The helicon wave discharge determined, and a typical value 1.3×10 19 m -3 gas pressure 50 mTorr electron 5.2×10 16 . Spatial temporal variations successfully measured.

10.1143/jjap.33.4308 article EN Japanese Journal of Applied Physics 1994-07-01

Equiatomic compounds HfRuP, ZrRuP, ZrRuAs, ZrRuSi, ZrRuGe, ZrRhSi and NbPS having the valence electrons per formula unit of 16 or 17 were prepared at high temperatures pressures. Electrical magnetic properties have been studied low temperatures. These show superconducting transition above 10 K. The upper critical fields(H c2 's) ZrRuX(X = P, As, Si Ge) are 14, 16, 14.1, 14.5, 8.3 tesla(T) 0 K, respectively. H is highest among equiatomic compounds.

10.7567/jjaps.39s1.525 article EN Japanese Journal of Applied Physics 2000-01-01

High-speed steel type cast iron rolls were developed around 1990 and have been widely used in the former stands of hot strip mills. However, latter mills, use high-speed has limited due to insufficient crack resistance. Therefore, order improve wear resistance stands, enhanced high-nickel grain which MC carbides high hardness are crystallized a conventional roll developed. since is significantly inferior that roll. The development new with superior applicable mills was studied. present...

10.2355/tetsutohagane.tetsu-2020-003 article EN cc-by-nc-nd Tetsu-to-Hagane 2020-01-01

症例は70歳の女性で,2週間前から続く気分不良と嘔吐を主訴に当院救急外来を受診した.腹部造影CTにて小腸内に石灰化を伴う異物と,口側の小腸の拡張像を認め閉塞性イレウスと診断された.保存的治療で改善せず,手術目的に当科転科となった.腹部造影CTで胆囊底部にガス像を認め,胆囊頸部の結石,胆囊と十二指腸の近接も認めたことから胆囊十二指腸瘻に伴う胆石イレウスと診断した.初回は単孔式腹腔鏡下に腹腔内を検索し,胆囊周囲の著明な癒着と,結石の嵌頓した腸管を同定した.創部から体外に腸管を導出して結石の摘出のみ行った.33日後,腹腔鏡下に胆囊摘出術と胆囊十二指腸瘻閉鎖を行う二期的手術を施行した.胆摘後,十二指腸側の瘻孔部には大網を被覆した.術後経過は良好であった.近年,胆石イレウスに対する腹腔鏡下手術の有用性が報告されている.腹腔鏡下二期的手術を行い良好に経過した1例を経験したため報告する.

10.5833/jjgs.2014.0262 article EN The Japanese Journal of Gastroenterological Surgery 2015-01-01

Carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) were attached to amino-functionalized glass by evaporation of water from an aqueous MWCNT-COOH dispersion. After attachment, MWCNTs-COOH did not detach the despite physical treatments such as sonication and scrubbing with paper. Other combinations without carboxyl and/or amino groups result in a firm attachment; attachment surface was achieved solely through ionic interaction (-COO- ... +H3N-). Transmittance electrical resistance...

10.7209/tanso.2015.7 article EN TANSO 2015-01-01

症例は49歳の男性で,約1年半前に,突然の腹痛を主訴に当院へ紹介された.腹部造影CTにて上腸間膜動脈解離を指摘され,同時に腸回転異常症に伴う中腸軸捻転の所見を認め,入院となった.保存的治療にて速やかに改善したため,外来にて経過観察されていた.今回,前日からの腹痛と嘔吐を主訴に当院を受診した.腹部造影CTにて中腸軸捻転の所見を認め,捻転部での通過障害が疑われた.腸管血流障害の所見を認めなかったため,保存的治療を行ったが改善せず,腹腔鏡下に中腸軸捻転の解除術と虫垂切除術を施行した.Treitz靭帯は無形成で,上腸間膜動脈の腹側に十二指腸,背側に横行結腸を認めるreversed rotationの腸回転異常症であった.術後経過は良好であった.成人腸回転異常症に伴う中腸軸捻転に対する腹腔鏡下手術は,腸管血流障害の危険がなく,十分な術前精査が可能である症例に対しては有用であると考えられる.

10.5833/jjgs.2015.0168 article JA The Japanese Journal of Gastroenterological Surgery 2016-01-01
Coming Soon ...