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Electrocatalytic evolution of oxygen on NiCu particles modifying conductive alumina/nano-carbon network composite electrode

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Science China(Technological Sciences) 2012年第12期55卷 3388-3394页

作者： FUJI Masayoshi shirai takashi WATANABE Hideo TAKAHASHI Minoru Ceramics Research Laboratory Nagoya Institute of Technology

In this paper, a novel electrically conductive alumina/nano-carbon network (NCN) composite material was used as an electro- catalyst carrier. A NiCu/Al2O3 /NCN composite electrode was prepared by electrodepositing NiCu particles onto the surface of the conductive alumina/NCN composite. Morphology, composition, crystalline structure and electrochemical properties of the NiCu/Al2O3 /NCN composite electrode were investigated. The results showed that NiCu particles can be deposited onto the surface of the alumina/NCN composite by a coelectrodeposition method. NiCu particles in the form of solid solution with face-centered cubic (fcc) structure were relatively uniformly distributed over the carbon layer of the conductive ceramic between alumina grains. As-resulted NiCu/Al2O3 /NCN composite electrode had a remarkably enhanced electrochemical activity and high stabilization for oxygen evolution reaction, which indicated its potential application with enhanced performance to oxygen evolution reaction (OER). Moreover, based on the electrochemical measurement, the mechanism of the OER on the NiCu/Al2O3 /NCN composite electrode was discussed.

关键词： conductive aluminafNCN electrodeposition NiCu oxygen evolution electrocatalytic activity

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Enhanced electrical property of graphite/Al_(2)O_(3) composite fabricated by reductive sintering of gel-casted body using cross-linked epoxy polymer

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Journal of Advanced Ceramics 2022年第4期11卷 523-531页

作者： Yoshiaki FUNAHASHI Yunzi XIN Kunihiko KATO Huu Hien NGUYEN takashi shirai Department of Life Science and Applied Chemistry Graduate School of EngineeringNagoya Institute of TechnologyGokiso-choShowa-kuNagoyaAichi 466-8555Japan Advanced Ceramics Research Center Nagoya Institute of TechnologyGokiso-choShowa-kuNagoyaAichi 466-8555Japan

In the present study,graphite/alumina composites are fabricated via reductive sintering of gel-casted green bodies with structurally controlled cross-linked epoxy polymers for the first *** cross-linking degrees of polymers are tuned by the amount ratio of epoxy monomer/polyvinyl alcohol cross-linker utilized in gel-casting *** electrical properties with respect to 5-fold enhanced electrical conductivity and 2-fold higher carrier mobility are successfully achieved in graphite/alumina composite fabricated from cross-linked epoxy polymer,whose phenomenon is attributed to the excellent conductive path in ceramic matrix established by highly uniform network with improved graphitization degree.

关键词： ceramic composite gel-casting reductive sintering cross-linking electrical property graphitization

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Postoperative complications of umbilical loop colostomy for anorectal malformations in neonates compared with the conventional abdominal stoma: a non-randomized study

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World Journal of Pediatric Surgery 2019年第1期2卷 21-23页

作者： Tatsuma Sakaguchi Yoshinori Hamada Takeshi shirai Hiroshi Hamada Yusuke Shigeta Yusuke Nakamura takashi Doi Department of Surgery Kansai Medical UniversityOsakaJapan

background We previously reported a pilot study of temporary umbilical loop colostomy for neonates with intermediate-type anorectal malformations(ARM)and recommended this technique because of its cosmetic *** herein report the postoperative complications of umbilical stomas(US)compared with traditional abdominal stomas(AS).Methods From our institutional prospective database,we analyzed the patients with ARMs who underwent stoma creation at Kansai Medical University Hospital from January 1995 to November *** surgical technique used to create the US had been performed since *** US and AS were made for 12 and 27 patients with ARMs,*** postoperative complication rates in patients who underwent US and AS had no significant difference(17%and 11%,p=0.6).The complications comprised a wound infection(one case of US),ileus(one case each of US and AS),mucosal prolapse(one case of AS),and depression(one case of AS).No emergency surgery was required for these *** For patients with ARMs,the umbilicus appears to be a safe alternative site for temporary loop colostomy.

关键词： complications abdominal wound

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Maintenance time of sedative effects after an intravenous infusion of diazepam: A guide for endoscopy using diazepam

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World Journal of Gastroenterology 2008年第33期14卷 5197-5203页

作者： Mitsushige Sugimoto Takahisa Furuta Akiko Nakamura Naohito shirai Mutsuhiro Ikuma Shingen Misaka Shinya Uchida Hiroshi Watanabe Kyoichi Ohashi takashi Ishizaki Akira Hishida First Department of Medicine Hamamatsu University School of Medicine1-20-1 Handayama Higashi-ku Hamamatsu 431-3192 Japan Center for Clinical Research Hamamatsu University School of Medicine1-20-1 Handayama Higashi-ku Hamamatsu 431-3192 Japan Department of Gastroenterology Enshu General Hospital1-1-1 Tyuou Naka-ku Hamamatsu 430-0929 Japan Department of Pharmacoki-netics and Pharmacodynamics School of Pharmaceutics Sciences University of Shizuoka52-1 Yada Suruga-ku Shizuoka 422-8526 Japan Department of Clinical Pharmacology and Therapeutics Hamamatsu University School of Medicine1-20-1 Handayama Higashi-ku Hamamatsu 431-3192 Japan Department of Clinical Pharmacology and Therapeutics Oita University1-1 Idaigaoka Hazama Yufu 879-5593 Japan

AIM: To examine whether the sedative effects assessed by psychomotor tests would depend on the cytochrome P450 (CYP ) 2C19 genotypes after an infusion regimen of diazepam commonly used forgastrointestinal endoscopy in Japan. METHODS: Fifteen healthy Japanese volunteers consisting of three different CYP2C19 genotype groups underwent a critical ? icker fusion test, an eye movement analysis and a postural sway test as a test for physical sedative effects, and a visual analog scale (VAS) symptom assessment method as a test for mental sedative effects during the 336 h period after the intravenous infusion of diazepam (5 mg). RESULTS: The physical sedative effects assessed by the critical flicker test continued for 1 h (t values of 5 min, 30 min and 60 min later: 4.35, 5.00 and 3.19, respectively) and those by the moving radial area of a postural sway test continued for 3 h (t values of 5 h, 30 h, 60 min and 3 h later: -4.05, -3.42, -2.17 and -2.58, respectively), which changed significantly compared with the baseline level before infusion (P < 0.05). On the other hand, the mental sedative effects by the VAS method improved within 1 h. The CYP2C19 genotype-dependent differences in the postinfusion sedative effects were not observed in any of the four psychomotor function tests. CONCLUSION: With the psychomotor tests, the objective sedative effects of diazepam continued for 1 h to 3 h irrespective of CYP2C19 genotype status and the subjective sedative symptoms improved within 1 h. Up to 3 h of clinical care appears to be required after the infusion of diazepam, although patients feel subjectively improved.

关键词： Diazepam Sedation cytochrome P450(CYP) 2C19 Endoscopy Complication Critical flicker fusion test Eye movement analysis Postural sway test Visual analog scale

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Pharmacogenomics-based tailored strategy for Helicobacter pylori infection

Pharmacogenomics-based tailored strategy for Helicobacter py...

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第三届中日双边药理学和临床药理学学术会议

作者： FURUTA Takahisa SUGIMOTO Mitsushige shirai Naohito KODAIRA Chise NISHINO Masafumi YAMADE Mihoko IKUMA Mutsuhiro WATANABE Hiroshi UMEMURA Kazuo OHASHI Kyoichi ISHIZAKI takashi HISHIDA Akira Center for Clinical Research First Department of Medicine Department of Laboratory Medicine First Department of Medicine First Department of Medicine First Department of Medicine First Department of Medicine Department of Clinical Pharmacology and Therapeutics Department of Pharmacology Hamamatsu University School of MedicineHamamatsuJapan Department of Clinical Pharmacology and Therapeutics Clinical Pharmacology CenterFaculty of MedicineOita UniversityOitaJapan Department of Clinical Pharmacology and Therapeutics First Department of Medicine

＜正＞AIM Helicobacter pylori eradication rates by triple therapy with a proton pump inhibitor,amoxicillin and clarithromycin at standard doses depend on bacterial susceptibility to clarithromycin and patient CYP2C19 gen- *** examined the usefulness of a personalized therapy for *** infection based on these factors as determined by genetic *** First,opti- mal lansoprazole dosing schedules that would achieve suffi- cient acid inhibition to allow *** eradication therapy in each of different CYP2C19 genotype groups were deter- mined by a 24-h intragastric pH ***,300 H. pylori-positive patients were randomly assigned to the standard regimen group （lansoprazole 30 mg bid,clar- ithromycin 400 mg bid,and amoxicillin 750 mg bid for one week）or the tailored regimen group based on CYP2C19 status and bacterial susceptibility to clarithromy- cin assessed by genetic *** with failure of e- radication underwent the second-line *** In the first-line therapy,the intention-to-treat eradication rate in the tailored regimen group was 96.0%,significant- ly higher than that in the standard regimen group （70.0%）.CONCLUSION The phannacogenomics- based tailored treatment for *** infection allowed a higher eradication rate by the initial treatment.

关键词： CYP2C19 Helicobacter pylori lansoprazole clarithromycin pharmacogenomics

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