著者

Ken Kozuma Taishiro Chikamori Jun Hashimoto Junko Honye Takanori Ikeda Sugao Ishiwata Mamoru Kato Hiroshi Kondo Kosuke Matsubara Kazuma Matsumoto Naoya Matsumoto Sadako Motoyama Kotaro Obunai Hajime Sakamoto Kyoko Soejima Shigeru Suzuki Koichiro Abe Hideo Amano Hirofumi Hioki Takashi Iimori Hideki Kawai Hisanori Kosuge Tatsuya Nakama Yasuyuki Suzuki Kazuya Takeda Akiko Ueda Takashi Yamashita Kenzo Hirao Takeshi Kimura Ryozo Nagai Masato Nakamura Wataru Shimizu Nagara Tamaki on behalf of the Japanese Circulation Society Joint Working Group

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-21-0379, (Released:2022-04-22)

参考文献数

230

被引用文献数

7

著者

Keisuke Nagasaki Akie Nakamura Takeru Yamauchi Hotaka Kamasaki Yosuke Hara Junko Kanno Satomi Koyama Yoshiaki Ohtsu Ikuko Takahashi Shigeru Suzuki Kenichi Kashimada Toshihiro Tajima

出版者

The Japanese Society for Pediatric Endocrinology

雑誌

Clinical Pediatric Endocrinology (ISSN:09185739)

巻号頁・発行日

vol.30, no.2, pp.79-84, 2021 (Released:2021-04-03)

参考文献数

16

被引用文献数

2

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Atrophic autoimmune thyroiditis (AAT) is a type of autoimmune hypothyroidism without goiter. TSH receptor-blocking antibodies (TSBAb) are involved in its etiology in adults. Reportedly, this disease is extremely rare in children. In this study, we aimed to investigate the prevalence of TSBAb during AAT onset in children using a commercially available cell-based bioassay TSAb kit. We conducted a multicenter retrospective observational study. We collected data of patients with AAT who were < 15 yr old, enrolled in a collaborative research group, and diagnosed since July 2003. AAT was defined as acquired autoimmune hypothyroidism without thyroid enlargement. Eighteen patients (including 15 females) whose TSH receptor antibody (TRAb) or TSBAb levels were measured within a year from the initial visit were included. The median age at diagnosis was 9.3 years, and the estimated time between onset and diagnosis was 2.6 yr. The positive rate for either TSBAb or TRAb was 38.8% (95% confidence interval: 18.3–59.5%). There were no significant differences in age, the estimated time between onset and diagnosis, and FT4 levels at diagnosis between the TSBAb-positive and -negative groups. Unlike previous reports, we showed that the prevalence of TSBAb-positivity in childhood-onset AATs is not rare, as in adults.

著者

Kiyoshi Urakawa Motohiro Kasuya Kiyoshi Kanie Hiroyuki Shibata Takenobu Sato Takashi Ebata Shigeru Suzuki

出版者

The Japan Society of Vacuum and Surface Science

雑誌

e-Journal of Surface Science and Nanotechnology (ISSN:13480391)

巻号頁・発行日

pp.2022-026, (Released:2022-06-11)

参考文献数

16

被引用文献数

2

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The aluminum oxide thin films formed on the surfaces of FeCo-V alloys doped with a small amount of aluminum were characterized by ellipsometry and electrical resistivity measurements. Aluminum oxide films on alloy surfaces were selectively formed by annealing under a low partial pressure of oxygen. The thickness of the oxide films increased with increasing aluminum content and temperature. However, the electrical resistivity of the oxide thin films did not correlate with the thickness of the oxide films. To clarify the anomaly of the resistivity, micro-beam X-ray photoelectron spectroscopy (XPS) was used to characterize the two-dimensional distribution of elements on the alloy surface. The XPS results show that the oxide films were partially exfoliated in the alloys with a high aluminum content. In particular, the oxide films were likely to be exfoliated or separated in relatively thick oxide films because of their dissimilar properties at vicinities close to the interface between the substrate and aluminum oxide thin films. Therefore, the thickness of the oxide film, and the amount of aluminum, are crucial for controlling the formation of aluminum oxide thin films with high resistivity in FeCo-V alloys.

著者

鈴木 茂 Shigeru Suzuki 松山大学経済学部 Matsuyama University Faculty of Economics

出版者

松山大学総合研究所

雑誌

松山大学論集 = Matsuyama University review (ISSN:09163298)

巻号頁・発行日

vol.25, no.1, pp.1-29, 2013-04-01

著者

Shigeru Suzuki Koji Hotta Eui Pyo Kwon Shun Fujieda Kozo Shinoda Masayoshi Kumagai Kentaro Kajiwara Masugu Sato Shigeo Sato

出版者

一般社団法人 日本鉄鋼協会

雑誌

ISIJ International (ISSN:09151559)

巻号頁・発行日

vol.55, no.10, pp.2158-2165, 2015-10-15 (Released:2015-10-28)

参考文献数

48

被引用文献数

7

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Electron backscatter diffraction was used to observe the microstructure of an austenitic high-manganese twinning-induced plasticity steel and investigate the crystal orientation of grains in this steel. The results showed that mechanical twins are formed in a grain with a high Schmid factor during the tensile test. The orientation data obtained were used to estimate the anisotropic elasticity of the grains in the steel. The microscopic stress and strain evolved in the microstructure of the steel unloaded after plastic deformation were estimated using finite element method simulation in which the elastic anisotropy of the steel was taken into account. The simulation indicated that the evolution of microscopic stress and strain in the microstructure is considerably influenced by the crystal orientation of the grains. Furthermore, white X-ray diffraction with microbeam synchrotron radiation was used to characterize the evolution of microscopic stress and strain in the grains of the steel. The stress analysis during white X-ray diffraction indicated the formation of residual microscopic stress after tensile deformation, which was found to be distributed heterogeneously in the steel. It was also shown that the direction of the maximum principal stresses at different points in the microstructure under loading were mostly oriented along the tensile direction. These results are fairly consistent with the results obtained by the simulation, although absolute values of the real principal stresses may be influenced by the heterogeneously evolved strain and the several assumptions used in the simulation.

著者

Masayoshi Kumagai Shigeo Sato Shigeru Suzuki Muneyuki Imafuku Hitoshi Tashiro Shin-ichi Ohya

出版者

一般社団法人 日本鉄鋼協会

雑誌

ISIJ International (ISSN:09151559)

巻号頁・発行日

vol.55, no.7, pp.1489-1495, 2015-07-15 (Released:2015-07-30)

参考文献数

19

被引用文献数

1 3

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Measurement of the residual stresses in cold-drawn pearlitic steel wire was conducted using an energy dispersive X-ray diffraction technique. The residual stresses of the ferrite and cementite phases were determined for different crystal orientations and large residual stresses were found to exist in the cold-drawn pearlitic steel wire. The residual stresses in the ferrite phase were compressive in the axial direction but nearly zero in the hoop and radial directions. In addition, the residual stresses of the reflection indices for the ferrite phase were similar to one another. For the cementite phase, while tensile residual stress existed in the axial direction, compressive residual stress existed in the hoop and radial directions. These stresses in the ferrite phase in the axial direction and cementite phase in all directions decreased along the radial positions. A residual stress state model was proposed on the basis of the aligned lamellar structure along the drawing direction; the model explains the effect of the lamellar direction on residual stress. Reanalysis of the wire sample using the proposed model provided residual strains and stresses in the lamellar direction that were different from the average values estimated using the simple stress analysis method.

著者

Yoshihiro Miyake Keiko Tanaka Tetsuo Nishikawa Mitsuhide Naruse Ryoichi Takayanagi Hironobu Sasano Yoshiyu Takeda Hirotaka Shibata Masakatsu Sone Fumitoshi Satoh Masanobu Yamada Hajime Ueshiba Takuyuki Katabami Yasumasa Iwasaki Hirotoshi Tanaka Yusuke Tanahashi Shigeru Suzuki Tomonobu Hasegawa Noriyuki Katsumata Toshihiro Tajima Toshihiko Yanase

出版者

(社)日本内分泌学会

雑誌

Endocrine Journal (ISSN:09188959)

巻号頁・発行日

pp.EJ13-0353, (Released:2013-09-28)

被引用文献数

7 36

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The Research Committee of Disorders of Adrenal Hormones, Japan, undertook a nationwide epidemiological study of primary aldosteronism (PA). The present study was undertaken as a part of this study to reveal the relationship between type of treatment and the prognosis of PA. In the primary survey, 4161 patients with PA during the period January 1, 2003-December 31, 2007 were reported from 3252 departments of internal medicine, pediatrics and urology. In the secondary survey, a questionnaire that requested detailed clinical information on individual patients was sent to those departments reporting patients in the primary survey. In total, data on 1706 patients with PA were available in the present study. Among patients with bilateral or unilateral aldosterone-producing adenoma, after adjustment for age at which prognosis was examined, sex, surgical treatment and medical treatment, surgical treatment was significantly associated with amelioration of hypertension (adjusted odds ratio [OR]: 0.47 [95% confidence interval (CI): 0.29–0.77]) and hypokalemia (adjusted OR: 0.17 [95% CI: 0.11–0.29]). No significant relationship was observed between medical treatment and such prognosis in this group of patients. Among patients with bilateral or unilateral adrenal hyperplasia, surgical, but not medical, treatment was significantly associated with amelioration of hypokalemia (adjusted OR: 0.23 [95% CI: 0.06–0.74]), while there was no relationship between surgical or medical treatment and the prognosis of hypertension. In conclusion, surgery offered a better prognosis of PA than medication with regards to hypertension and hypokalemia, with the limitation that a new anti-aldosterone drug, eplerenone, was not available during the study period.