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Three Cases of Cervical Schwannoma Arising from Vagus Nerve

Takao Ogawa, Masakazu Hanamitsu, Fumio Ogawa, Masayuki Shibayama, Satoshi Sonoda, Mikio Suzuki, Takeshi Shimizu
2007 Practica Oto-Rhino-Laryngologica  
Cervical schwannoma arising from the vagus nerve is relatively uncommon. During the last six years, we treated three cases of cervical schwannnoma arising from the vagus nerve, that were effectively diagnosed by MR imaging. We performed complete resection of the tumor in one case and intracapsular resection in the other two cases, however, postoperative nerve palsy occurred in every case, causing misswallowing and hoarseness. Mis-swallowing improved within one month without treatment, but
more » ... ness persisted longer. Finally, medialization of the vocal cords was a successive treatment to improve hoarseness.
doi:10.5631/jibirin.100.467 fatcat:o7zi7mcogrb5hm7kxqs2behz2i

Occurrence of the Renin-Angiotensin System in the Vertebrates

Mizuho OGAWA, Mikio OGURI
1978 Japanese Heart Journal  
I Organization of Juxtaglomerular Apparatus (JGA) in Vertebrate Kidneysa a Modified after Sokabe and Ogawa .1) b Transitional form .  ...  no activity. 25) Macula densa in non-mammalian kidney: Concerning the presence of MD in non-mammalian nephron, several investigators have recently reported its presence in amphibian kidney.20)-29) Ogawa  ... 
doi:10.1536/ihj.19.791 fatcat:ewmwlg5i7reojjwumeg7l2nc5e

Devolutive dentitions of the sea snake, Emydocephalus ijimae

Mikio Ishiyama, Tatsuyuki Ogawa
1981 Japanese Journal of Oral Biology  
The sea snake, E. ijimae , has no functional teeth other than maxillary fangs and pterygoid teeth in the jaws as has been observed in the present species by Voris (1966) . Histological examination by light microscopy reveals that the dentary and palatine dental laminae exist close to th e dentary and palatine bones respectively and the maxillary dental laminae is separated backward of the maxilla in the adult specimen. On the other hand , the fetus, nearly ready for birth, has tooth germs which
more » ... are situated in superficial portion of the oral mucosa and also near the dentary bones . Because of these histological structures, the dentition of both specimens are apparently vestigial , and by taking the comparative anatomy and/or dietary habit into consideration , the present species of degenerated dentition may have originated from ancestral toothed species .
doi:10.2330/joralbiosci1965.23.691 fatcat:fkvzspddx5fj5id4gkzg7a4ucm


1989 Chemotherapy  
doi:10.11250/chemotherapy1953.37.supplement1_1084 fatcat:w2yooqtavzei5ghrj6artwh7m4

Juxtaglomerular Cells in Aglomerular Teleosts

Mikio OGURI, Mizuho OGAWA, Hirofumi SOKABE
1972 Nippon Suisan Gakkaishi  
Juxtaglomerular cells were detected in the kidneys of the following five species of aglomerular teleosts; Histrio histrio, Lophius litulon , Opsanus tau, Phrynelox nox and P. tridens. The results of histological observations on these cells were reported. These results suggest some important systemic function(s) of renin-angiotensin system in teleosts .
doi:10.2331/suisan.38.195 fatcat:6sdfszictbaozmvvy5fjhozf7q

Inhibition of influenza virus hemagglutination by animal sera

Mikio Nakayama, Yasue Takeuchi, Yoshio Ogawa, Yukio Yamazi
1986 Journal of Nippon Medical School  
doi:10.1272/jnms1923.53.537 pmid:3782442 fatcat:lckce2kdjfgm7jioencj66cumy


1988 Chemotherapy  
南 江 堂, 1973 FUMIHIKO KOBAYASHI, MIKIO OGAWA, MINORU MATSUURA and TOSHIO YOSHIZAKI Kanzakigawa Laboratory, Shionogi Research Laboratories, Shionogi & Co., Ltd., Toyonaka, Japan Table 6 6 -2.  ... 
doi:10.11250/chemotherapy1953.36.supplement2-base_449 fatcat:qq6dhglf2bbq3abpv7iuddi43q

Solvent Extraction of Copper(II) with 1-Adamantanecarboxylic Acid in Benzene

Yoshio MORIYA, Mikio SUGAI, Yozo OHSHIMA, Nobuaki OGAWA
1996 Analytical Sciences  
doi:10.2116/analsci.12.511 fatcat:jiq65vbhzbg7dn57whqczqgvsm

Tobramycinの聴器毒性について (第一報)

1975 Chemotherapy  
doi:10.11250/chemotherapy1953.23.1522 fatcat:rfezpba5djfnbku7ljganpuo34

Stability of α′′-Fe16N2 in hydrogenous atmospheres

Shinpei Yamamoto, Ruwan Gallage, Seiji Isoda, Yasunobu Ogata, Yoshihiro Kusano, Naoya Kobayashi, Tomoyuki Ogawa, Naoaki Hayashi, Migaku Takahashi, Mikio Takano
2014 Chemical Communications  
We revealed inherent instability of α"-Fe16N2 in hydrogenous atmospheres due to denitrification toward α-Fe by forming NH3 at the particle surface. Coating the particle surface with SiO2 to suppress formation of NH3 has proven to be a simple yet powerful method to enhance stability in hydrogenous 10 atmospheres. Utilization of hydrogen energy, which can be produced from various renewable energy sources and emits no greenhouse gases in use, has potential to contribute to the formation of
more » ... ble society. Replacement of fossil fuels by hydrogen gas thus has 15 been studied for all levels of social systems covering from infrastructures to consumer devices. As we prepare to start the hydrogen society, development of materials stable in hydrogenous atmospheres is highly needed. 1 Here we examine the stability of a new powerful magnetic material, α"-Fe16N2, 20 which may potentially be applied to, e.g., motors to be used for supply and transportation of hydrogen gas. 2 As α"-Fe16N2 has to be prepared and processed under reducing conditions, it is also important to understand behaviors in hydrogen gas. α"-Fe16N2 is a meta-stable compound with body-centered 25 tetragonal (bct) structure, which is essentially α-Fe containing the nitrogen atoms ordered on interstitial sites. This material has attracted much interest since the first report of a 'giant' magnetic moment. 3 Although the formation of this phase was already reported in 1951, 4 it was difficult to obtain monophasic samples, 30 and this made the reported saturation magnetization (Ms) widely scattered. 5 We recently have succeeded in preparing high-purity powdered samples in a large size of 10 g/batch and reported that the Ms and the uniaxial magnetocrystalline anisotropy, Ku, were as high as 234 emu/g and 1 × 10 7 erg/cm 3 at 5 K, respectively. 6 35 Potential use of this material for magnetic recording and microwave absorption has attracted much attention. 7 Recently, another possible application as a permanent magnet has emerged. 8,9 The maximum energy product (BHmax), the figure of merit that measures the performance of a permanent magnet, 40 calculated using the experimentally determined Ms and Ku values reaches more than 100 MGOe, ‡ which is about 1.6 times larger than that of the currently strongest Nd-Fe-B magnet (∼ 64 MGOe). For practical applications quantitative understanding of 45 stability-related matters is highly needed for this meta-stable material. We recently reported detailed studies about the stability in inert atmospheres, nitrogen and argon, where decomposition proceeds by intra-solid atomic rearrangements to form a 4 : 1 molar mixture of α-Fe and γ'-Fe4N, without releasing nitrogen. 10 50 Decomposition in reactive atmospheres like hydrogen gas could be very different because of possible dominance of solid-gas reactions. Here, we report a quantitative study on stability of α"-Fe16N2 in hydrogenous atmospheres using in-situ powder X-ray diffraction (XRD). Based on the understanding about the 55 decomposition process gained, we have succeeded in developing a simple yet powerful method for enhancing the stability. The current results will open ways to wide applications of α"-Fe16N2 in hydrogenous atmospheres. The α"-Fe16N2 samples used in this study were prepared in 60 two steps, oxide-to-metal reduction in a H2 stream and subsequent metal-to-nitride conversion using an NH3 stream, within a reactor chamber attached to the X-ray diffractometer used (see Electric Supplementary Information (ESI) ). 6 In the starting samples, only α"-Fe16N2 and ~ 7 wt% of α-Fe were 65 detected by XRD (see Run#0 in Figures and Tables S1 ~ S7 in ESI). The average crystallite size of the nitride estimated by using the Scherrer formula was ca. 28 ~ 36 nm (see Table S8 in ESI). For the in-situ XRD measurements, each sample was kept at a constant temperature of T = 393, 398, 403, 413 or 423 K for a 70 certain period of time (t) in a hydrogenous atmosphere (see ESI for details). Figures S1 ~ S5 in ESI show those collected in pure hydrogen atmosphere (Experiments A ~ E). With increasing heating time, α"-Fe16N2 decreased while α-Fe increased. No other crystalline phases were detected, revealing that the 75 decomposition proceeded via loss of the interstitial nitrogen atoms. As evidenced by the mass spectroscopic analyses done in the same atmosphere, the interstitial nitrogen atoms were removed in the form of NH3 although simultaneous evolution of a Fig. 1 Schematic representation of decomposition of α"-Fe16N2 in hydrogenous atmospheres. Formation of NH3 (kReac) and diffusion of the interstitial nitrogen atoms (kDiff) determine the overall reaction rate in the early and the latter stage of the decomposition, respectively.
doi:10.1039/c4cc01839g pmid:24849002 fatcat:n2r6dmbaknag5jhcilpnexky2i

Characterization of self-assembled silver nanoparticle ink based on nanoemulsion method

Donghao Hu, Kazuyoshi Ogawa, Mikio Kajiyama, Toshiharu Enomae
2020 Royal Society Open Science  
A well-dispersed self-assembled silver nanoparticles (AgNPs) ink with high purity was synthesized via AgNO 3 emulsion prepared by blending an AgNO 3 aqueous solution and a liquid paraffin solution of both polyoxyethylene (20) sorbitan monooleate (Tween 80) and sorbitan monooleate (Span 80). The ink remained as an emulsion at low temperatures; however, it produced AgNPs after sintering at about 60°C and showed a high stability at nanoscale sizes (with diameters ranging 8.6–13.4 nm) and a high
more » ... ductivity. During the whole procedure, Tween 80 acted as a surfactant, reductant and stabilizer. Presumably, Tween 80 underwent an autoxidation process, where a free radical of an α-carbon of ether oxygen was formed by hydrogen abstraction. The mean diameter of emulsion droplets could be reduced by decreasing water content and increasing the ratio of surfactant and concentration of AgNO 3 aqueous solution. Consequently, the thermogravimetric analysis and X-ray diffraction result clarified the purity of the produced Ag 0 . Dynamic light scattering and ultraviolet-visible spectroscopy clarified that an increased concentration of AgNO 3 decreased the particle size.
doi:10.1098/rsos.200296 pmid:32537225 pmcid:PMC7277254 fatcat:btspzkmuy5ch5frlgfsvgyv7oe

Fabrication of Field Emission Cathode with Sputtering Deposition

Nobuya SEKO, Mikio MOURI, Osamu ISHIKURA, Akio OKAMOTO, Yoshihiko SUZUKI, Souichi OGAWA
1994 Shinku  
doi:10.3131/jvsj.37.270 fatcat:gcvh6dyqqbgzrnovn7cu4v7kh4

Quantitative understanding of thermal stability of α′′-Fe16N2

Shinpei Yamamoto, Ruwan Gallage, Yasunobu Ogata, Yoshihiro Kusano, Naoya Kobayashi, Tomoyuki Ogawa, Naoaki Hayashi, Kaori Kohara, Migaku Takahashi, Mikio Takano
2013 Chemical Communications  
doi:10.1039/c3cc43590c pmid:23877656 fatcat:2ll44upttbbctmvfnoylfo2wyy

Float zone growth and anisotropic spectral properties of Nd:LaVO4 single crystals

Shohei Yomogida, Mikio Higuchi, Takayo Ogawa, Satoshi Wada, Junichi Takahashi
2012 Journal of Crystal Growth  
Nd:LaVO 4 single crystals were successfully grown by the floating zone method and their optical properties along each optic elasticity axis were investigated. The crystals grown at 10mm/h in air did not contain any macroscopic defects for Nd-concentrations up to 5 at%. The optic elasticity axes were determined by the conoscopic figures with a polarizing microscope. The absorption cross-section along the Z-axis was 2.6×10 -20 cm 2 near 800 nm and the FWHM was 20 nm. The absorption cross-sections
more » ... along other directions were much the same as that along the Z-axis. The fluorescence lifetime of the 5 at%-doped crystal was approximately 80 μs. All the polarized fluorescence spectra of the Nd:LaVO 4 single crystal had a broadened band around 1060 nm with FWHMs of 7-10 nm, which are wide enough to generate femtosecond order pulses. Key word A2. Floating zone technique B1. Vanadates B3. Solid state lasers
doi:10.1016/j.jcrysgro.2012.08.021 fatcat:gcod4ftggbbpfm3tzky3uu7mde

Fine Structure of Duvernoy's Gland of the Japanese Colubrid Snake, Rhabdophis tigrinus

Sumio YOSHIE, Mikio ISHIYAMA, Tatsuyuki OGAWA
1982 Archives of histology and cytology  
As we have already reported (OGAWA, YosHIE and I5HIYAMA, 1981) , both ducts are composed only of mucus secreting cells in high columnar shape (Fig. 1, 9,10) .  ...  We have already reported that the secretory cells of the secretory unit, consisting of secretory tubules, are filled with secretory granules which were stained with both PAS and aldehyde-fuchsin (OGAWA  ... 
doi:10.1679/aohc.45.375 fatcat:csyuhj67xjakpofbv4bl4ghtwy
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