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Hydrogen Evolution from Water under Visible-Light Irradiation Using Keggin-Type Platinum(II)-Coordinated Phospho-, Silico-, and Germanotungstates as Co-Catalysts

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Modern Research in Catalysis 2016年第4期5卷 103-129页

作者： Chika Nozaki Kato Shunsaku Suzuki Yuki Ihara Koki Aono rie yamashita Keisuke Kikuchi Tetsuji Okamoto Hidemitsu Uno Department of Chemistry Shizuoka University Shizuoka Japan Green Chemistry Research Division Research Institute of Green Science and Technology Shizuoka University Shizuoka Japan Industrial Research Institute of Shizuoka Prefecture Shizuoka Japan Department of Chemistry and Biology Graduate School of Science and Engineering Ehime University Matsuyama Japan

The tetramethylammonium salts of diplatinum(II) complexes composed of mono-lacunary Keggin-type silico and germanotungstates, [(CH3)4N]4[α-SiW11O39{cis-Pt(NH3)2}2]·13H2O (TMA-Si-Pt) and [(CH3)4N]4[α-GeW11O39{cis-Pt(NH3)2}2]·11H2O (TMA-Ge-Pt), were synthesized and crystallized. Single crystals of a tetramethylammonium salt of Keggin-type diplatinum(II)-coordinated phosphotungstate [(CH3)4N]3[α-PW11O39{cis-Pt(NH3)2}2]×10H2O (TMA-P-Pt) were also obtained. The X-ray structural analyses revealed that the two cis-platinum(II) moieties, [cis-Pt(NH3)2]2+, were each coordinated to two oxygen atoms in a mono-vacant site of [XW11O39](12-n)- (Xn+ = Si4+, Ge4+, P5+). FTIR spectra of TMA-Si-Pt and TMA-Ge-Pt also suggested that the two platinum(II) moieties were coordinated to the vacant site of [SiW11O39]8- and [GeW11O39]8-. The 1H NMR spectra in DMSO-d6 of TMA-Si-Pt and TMA-Ge-Pt showed signals assigned to the two sets of NH3 ligands coordinated to the platinum sites. These three platinum compounds showed hydrogen evolution from aqueous triethanolamine solution under visible light irradiation (λ ≥ 400 nm) in the presence of eosin Y, α-Keggin mono-aluminum-substituted silicotungstate, and titanium dioxide. The catalytic activities were influenced by the central atoms, and TMA-P-Pt showed the highest activities among the three platinum compounds.

关键词： Polyoxometalates Diplatinum(II) Complex Hydrogen Evolution Visible Light X-Ray Crystallography

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Exploring the Possibility of Virtual Reality in Nursing Skills Education: A Preliminary Study Using a First-Person Video

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Open Journal of Nursing 2019年第2期9卷 163-172页

作者： Hiromi Shibuya Chisato Eto Mayumi Suzuki Ryo Imai Akemi yamashita rie Nakano Saori Kawanabe Motomi Yokota Satoshi Shibuya Department of Nursing Faculty of Health Science Technology Bunkyo Gakuin University Tokyo Japan Nippon Medical School Hospital Tokyo Japan Department of Integrative Physiology School of Medicine Kyorin University Tokyo Japan

Background: While demonstration videos from a third-person perspective have traditionally been used as teaching materials for nursing skills, first-person videos allow observers to experience how nursing educators move and what they see. In this pilot study, a first-person demonstration video for tracheostomy suctioning skills was shown to participants via a virtual reality (VR) head-mounted display (HMD), which we referred to as a VR teaching material (VR-TM). In an intervention experiment, we investigated the effects of the VR-TM on participants’ performance on the skill assessment test. Additionally, usability of the VR-TM was evaluated by questionnaire ratings. Methods: Thirty-six participants (nursing students) were assigned to three groups in the experiment: 1) VR group: the participants that viewed the VR-TM, 2) TR group: the participants that viewed a traditional demonstration video from a third-person perspective, and 3) NO group: the participants that received no intervention. Score changes in the skill assessments of participants before the intervention (pre-test) and after the intervention (post-test) were analyzed. After the experiment, all participants completed a faculty-designed questionnaire about the VR-TM usability. Results: The questionnaire ratings indicated that the participants evaluated the VR-TM favorably in terms of skill understanding and motivation to practice the skill. However, one-third of participants reported mild discomfort during the VR-TM. In regards to score changes in the skill assessment test, no significant difference between the VR and TR groups was identified, though the two groups produced greater score changes compared to the NO group. Conclusion: The combination of first-person video and the HMD might be promising as a teaching material for nursing skills, though further improvements are necessary.

关键词： Virtual Reality Nursing Education Tracheostomy Suctioning Demonstration Video

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Clinical and prognostic features in asymptomatic and symptomatic patients with arteriosclerosis obliterans

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World Journal of Cardiovascular Diseases 2012年第1期2卷 1-7页

作者： Hiromichi Ohsaka Kazunori Shimada Kosuke Fukao Eiryu Sai Yoshifumi Fukushima Hiroshi Masuda Kuniaki Hirose Takuma Yoshihara rie Matsumori Makoto Hiki Takashi Kiyanagi Atsumi Kume Haruyo yamashita Tetsuro Miyazaki Hiroyuki Daida 不详

Background: Patients with arteriosclerosis obliterans (ASO) often have co-existing atherosclerotic diseases. The purpose of this study was to examine the clinical features of patients with ASO, including the overlap of atherosclerotic risk factors, characteristics of car-diovascular events, and clinical prognosis. Method: We enrolled 205 consecutive patients who had ankle brachial index (ABI) of ?0.9 between January 2008 and December 2009. Fontaine (F) classification and clinical background were evaluated and clinical events including mortality and major adverse cardiocerebro-vascular events (MACCEs) were determined. Results: There was a high prevalence of each risk factor. Sixty- five percent of subjects had three or more of the four overlapping risk factors, including hypertension, dia- betes, dyslipidemia, and smoking. After a maximum follow-up of 800 days, the incidence of MACCEs and mortality was 46% and 10%, respectively. We divided the patients into two groups according to the presence of ASO symptoms (F1 and F2-4) and compared the incidence of events. The incidence of MACCEs and mortality in the F2-4 group was significantly higher than that in the F1 group (P = 0.048, P = 0.044, respectively). After excluding lower extremity revascularization, coronary artery disease was a common cause of MACCEs, and the mortality rates after MACCEs increased in a stepwise manner according to F classification severity (P = 0.028). Conclusion: Patients with ASO had overlapping coronary risk factors and a high incidence rate of cardiovascular events. The incidence of coronary events was common, especially in symptomatic patients, and the mortality rates after MACCEs were high in accordance with F classification severity.

关键词： Arteriosclerosis Obliterans Fontaine Classification Risk Factor Mortality Cardiocerebrovascular Event

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