Toshinari Oh-hara
Nagoya University
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Publication
Featured researches published by Toshinari Oh-hara.
Journal of Pharmaceutical Sciences | 2011
Zenzaburo Tozuka; Shinsuke Aoyama; Kohei Nozawa; Shoji Akita; Toshinari Oh-hara; Yasuhisa Adachi; Shin-ichi Ninomiya
Liquid chromatography-radioisotope-mass spectrometry (LC-RI-MS) analysis was used to determine the structures of 12 (four previously unknown) (14) C-tolbutamide (TB) metabolites in rat biological samples (plasma, urine, bile, feces, and microsomes). The four novel metabolites are ω-carboxy TB, hydroxyl TB (HTB)-O-glucuronide, TB-ortho or meta-glutathion, and tolylsulphoaminocarbo-glutathion. In rat plasma, after oral administration of (14) C-TB at therapeutic dose (1 mg/kg) and microdose (1.67 µg/kg), the total RI and six metabolites [HTB, carboxy TB (CTB), M1: desbutyl TB, M2: ω-hydroxyl TB, M3: α-hydroxyl TB, and M4: ω-1-hydroxyl TB] were quantified by LC-RI-MS. The plasma concentrations were calculated using their response factors (MS-RI intensity ratio) without standard samples, and the area under the curve (AUC) of plasma concentration per time for evaluation of Safety Testing of Drug Metabolites (MIST) was calculated using the ratio of TB metabolites AUC/total RI AUC. The ratios were as follows: TB 94.5% and HTB 2.5% for the microdose (1.67 µg/kg) and TB 95.6%, HTB 0.96%, CTB 0.065%, M1 0.62%, M2 0.0035%, M3 0.077%, and M4 0.015% for the therapeutic dose (1 mg/kg). These values were less than 10% of the MIST criteria.
Applied Physics Express | 2017
Lei Jin; Masahito Yamanaka; Volker Sonnenschein; Hideki Tomita; Tetsuo Iguchi; Atsushi Sato; Toshinari Oh-hara; Norihiko Nishizawa
We report a tunable mid-infrared frequency comb working at 184 MHz, which is based on difference frequency generation in a periodically poled Mg-doped stoichiometric lithium tantalate (PPMgSLT) crystal pumped by high-power supercontinuum pulses. Supercontinuum pulses from two fibers with different dispersion properties were examined. With a photonic crystal fiber (PCF) having normal dispersion properties, a tunable wavelength range of 2.9–4.7 µm was achieved. With another PCF having zero dispersion at 1040 nm, a maximum power of 1.34 mW was observed at 3.9 µm. The high coherence of the pulses generated with this scheme was verified experimentally, and a fringe visibility of 0.90 was observed.
Hyperfine Interactions | 2017
Ryohei Terabayashi; Volker Sonnenschein; Hideki Tomita; Noriyoshi Hayashi; Shusuke Kato; Lei Jin; Masahito Yamanaka; Norihiko Nishizawa; Atsushi Sato; Kohei Nozawa; Kenta Hashizume; Toshinari Oh-hara; Tetsuo Iguchi
conference on lasers and electro optics | 2017
Lei Jin; Masahito Yamanaka; Volker Sonnenschein; Hideki Tomita; Tetsuo Iguchi; Atsushi Sato; Akira Ideno; Toshinari Oh-hara; Norihiko Nishizawa
The Japan Society of Applied Physics | 2017
Volker Sonnenschein; Ryohei Terabayashi; Hideki Tomita; Noriyoshi Hyashi; Shusuke Kato; Lei Jin; Masahito Yamanaka; Norihiko Nishizawa; Atsushi Sato; Kohei Nozawa; Kenta Hashizume; Toshinari Oh-hara; Tetsuo Iguchi
The Japan Society of Applied Physics | 2017
Volker Sonnenschein; Ryohei Terabayashi; Hideki Tomita; Noriyoshi Hayashi; Shusuke Kato; Lei Jin; Masahito Yamanaka; Norihiko Nishizawa; Atsushi Sato; Kohei Nozawa; Kenta Hashizume; Toshinari Oh-hara; Tetsuo Iguchi
Advanced Solid State Lasers | 2017
Lei Jin; Volker Sonnenschein; Masahito Yamanaka; Hideki Tomita; Tetsuo Iguchi; Atsushi Sato; Akira Ideno; Toshinari Oh-hara; Norihiko Nishizawa
The Japan Society of Applied Physics | 2016
Lei Jin; Masahito Yamanaka; Volker Sonnenschein; Hideki Tomita; Tetsuo Iguchi; Atsushi Sato; Akane Omori; Akira Ideno; Toshinari Oh-hara; Norihiko Nishizawa
The Japan Society of Applied Physics | 2016
Tetsuo Iguchi; Toshinari Oh-hara; Norihiko Nishizawa; Hideki Tomita; Masahito Yamanaka; Volker Sonnenschein; Lei Jin; Atsushi Sato; Akane Omori; Akira Ideno
The Japan Society of Applied Physics | 2016
Hideki Tomita; Volker Sonnenschein; Ryohei Terabayashi; Satoshi Yuruzume; Takahiro Hirotsu; Atsushi Sato; Lei Jin; Masahito Yamanaka; Norihiko Nishizawa; Akane Omori; Akira Ideno; Toshinari Oh-hara; Tetsuo Iguchi