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Phase-mediated cobalt phosphide with unique core-shell architecture serving as efficient and bifunctional electrocatalyst for hydrogen evolution and oxygen reduction reaction

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Chinese Chemical Letters 2022年第8期33卷 3752-3756页

作者： Junsheng Chen Jianfeng Huang Hai Wang Weihang Feng Tianmi Luo Yuzhu Hu Chengke Yuan Liyun Cao Yanni Jie koji Kajiyoshi Yongqiang Feng School of Material Science and Engineering International S&T Cooperation Foundation of Shaanxi ProvinceXi'an Key Laboratory of Green Manufacture of Ceramic MaterialsShaanxi University of Science and TechnologyXi'an 710021China Kochi University Research Laboratory of Hydrothermal ChemistryKochi 780-8520Japan

Hydrogen evolution reaction(HER)and oxygen reduction reaction(ORR)have been considered as two critical processes in the field of electrocatalytic water-splitting for hydrogen production and fuel ***,the sluggish reaction kinetics of HER and ORR required efficient electrocatalyst such as Pt to promote such *** metal phosphides(TMPs)exhibit great potential to replace noble metal electrocatalysts to accelerate HER and ORR due to their high activity and easy ***,a highly-efficient bifunctional CoP electrocatalyst for HER and ORR,featuring a unique core-shell structure decorated on nitrogen-doped carbon matrix was designed and constructed via etching a cobalt-based zeolitic imidazolate framework(ZIF-67)with phytic acid(PA)followed by pyrolysis treatment(PA-ZIF-67-900).Experimental results revealed that the pure-phase single-crystalline Co P exhibited outstanding electrocatalytic performance in HER and ORR,superior to Co(PO_(3))_(2) in PA-ZIF-67-700,hybrid phase of Co(PO_(3))_(2) and CoP in PA-ZIF-67-800 and Co_(2)P-doped CoP in *** reach the current density of 10 mA/cm^(2)the as-synthesized Co P required an overpotential of 120 m V for HER in 1 mol/L KOH and half-wave potential of 0.85 V in O_(2)-saturated 0.1 mol/L *** work present new clue for construction of efficient and bifunctional electrocatalyst in the field of energy conversion and storage.

关键词： Electrocatalyst Hydrogen evolution reaction Oxygen reduction reaction Transitional metal phosphide CoP

Analysis of molten metal spreading and solidification behaviors utilizing moving particle full-implicit method

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Frontiers in Energy 2021年第4期15卷 959-973页

作者： Ryo YOKOYAMA Masahiro KONDO Shunichi SUZUKI koji OKAMOTO Department of Nuclear Engineering and Management The University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-8656Japan Research Center for Computational Design of Advanced Functional materials(CD-FMat) Department of Materials and ChemistryNational Institute of Advanced Industrial Science and Technology(AIST)Central 21-1-1UmezonoTsukubaIbaraki 305-8568Japan Institute of Engineering Innovation School of EngineeringThe University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-8656Japan Nuclear Professional School The University of Tokyo2-22 ShirakataTokai-muraIbaraki 319-1188Japan

To retrieve the fuel debris in Fukushima Daiichi Nuclear Power Plants(1F),it is essential to infer the fuel debris *** particular,the molten metal spreading behavior is one of the vital phenomena in nuclear severe accidents because it determines the initial condition for further accident scenarios such as molten core concrete interaction(MCCI).In this study,the fundamental molten metal spreading experiments were performed with different outlet diameters and sample amounts to investigate the effect of the outlet for spreading-solidification *** the numerical analysis,the moving particle full-implicit method(MPFI),which is one of the particle methods,was applied to simulate the spreading *** the MPFI framework,the melting-solidification model including heat transfer,radiation heat loss,phase change,and solid fraction-dependent viscosity was developed and *** addition,the difference in the spreading and solidification behavior due to the outlet diameters was reproduced in the *** simulation results reveal the detailed solidification procedure during the molten metal *** is found that the viscosity change and the solid fraction change during the spreading are key factors for the free surface condition and solidified ***,it is suggested that the MPFI method has the potential to simulate the actual nuclear melt-down phenomena in the future.

关键词： molten metal spreading solidification particle method severe accident fuel debris decommissioning

Lattice Boltzmann Simulations of Water Transport from the Gas Diffusion Layer to the Gas Channel in PEFC

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Communications in Computational Physics 2011年第5期9卷 1206-1218页

作者： koji Moriyama Takaji Inamuro Fundamental Research Center Honda R&D Co.Ltd.Saitama 351-0193Japan Department of Aeronautics and Astronautics Graduate School of EngineeringKyoto UniversityKyoto 606-8501Japan Advanced Research Institute of Fluid Science and Engineering Graduate School of EngineeringKyoto UniversityKyoto 606-8501Japan

Water management is a key to ensuring high performance and durability of polymer electrolyte fuel cell(PEFC),and it is important to understand the behavior of liquid water in *** this study,the two-phase lattice Boltzmann method is applied to the simulations of water discharge from gas diffusion layers(GDL)to gas *** GDL is porous media composed of carbon fibers with hydrophobic treatment,and the gas channels are hydrophilic micro-scale *** the simulations,arbitrarily generated porous materials are used as the structures of the *** investigate the effects of solid surface wettabilities on water distribution in the gas channels and the ***,the results of X-ray computed tomography images in the operating PEFC are compared with the numerical simulations,and the mechanism of the water transport in PEFC is considered.

关键词： Two-phase lattice Boltzmann method polymer electrolyte fuel cell X-ray CT imaging gas diffusion layer

Tourist preferences for agricultural landscapes:a case study of terraced paddy fields in Noto Peninsula,Japan

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Journal of Mountain Science 2016年第10期13卷 1880-1892页

作者： CHEN Bixia QIU Zhenmian NAKAMURA koji Faculty of Agriculture University of the Ryukyus1 SenbaruNishihara TownOkinawa Prefecture903-0213Japan Fujian Normal University Fuzhou 350108China Kanazawa University Kanazawa CityIshikawa Prefecture920-1192Japan

Many agricultural landscapes have been formed through the interaction and co-evolution of nature and people, and represent the living landscapes shaped over time through intensive and continuous human cultivation. Terraced paddy fields are being re-evaluated to take into account the multiple functions they fill beyond only rice cultivation, particularly their contribution to the national biodiversity strategy of Japan. Since the 1990 s, terraced paddy fields have been considered a representative cultural landscape of Japan and, at the same time, multi-stakeholder conservation activities have been conducted throughout Japan to reverse the increasing abandonment of terraces. Shiroyone Senmaida is an outstanding cultural landscape and a major tourist attraction in Noto Peninsula, Ishikawa Prefecture, which was designated through an initiative by the Food and Agriculture Organization(FAO) as a Globally Important Agricultural Heritage Systems(GIAHS) pilot site in 2011. It is important to clarify tourist preference for terraced paddy field landscapes to contribute to future policy making toward improved agricultural landscape conservation. A key finding of this study is that tourists visiting toenjoy the agricultural landscape are also concerned on the sustainability of the farming methods and preferred to maintain the naturalness of the landscape. Respondents with higher educational levels and greater concern for the biological and traditional farming knowledge aspects of the rice terraces were also more inclined to favor sustainable farming practices. Tourists preferred to maintain the naturalness and rurality of the agricultural landscape, and indicated that construction of excessive tourist facilities would cause the landscape to deteriorate. It was suggested that the local community and surroundings, including rural settlements, hills, and forests, should also be conserved together with the scenic terrace.

关键词： Agricultural landscape Landscape aesthetics Landscape naturalness Terraced land Traditional farming Tourist preference

Model Analysis of Radar Echo Split Observed in an Artificial Cloud Seeding Experiment

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Journal of Meteorological Research 2016年第3期30卷 386-400页

作者： MASAKI Shimada KIKURO Tomine koji Nishiyama Department of Earth and Ocean Sciences National Defense Academy Faculty of Engineering Kyushu University

An artificial cloud seeding experiment was performed over the Japan Sea in winter to show how massive seeding could be effective to mitigate heavy snowfall *** results showed that 20 min after cloud seeding,a portion of the radar echo beneath the seeding track was weakened to divide the radar echo into two *** order to analyze the results,a numerical simulation was conducted by using the Weather Research and Forecasting model verion *** this simulation,the seeding effects were represented as phenomena capable of changing rain particles by accreting cloud ice and snow to form graupel particles and by changing cloud liquid water to snow *** graupel particles fell rapidly,thus temporarily intensifying the rainfall,which subsequently ***,the weakened radar echo in the field experiment is deemed to have been caused by the increase in rapidly falling graupel particles.

关键词： heavy snowfall artificial cloud seeding numerical experiment

Impact of endothelial nitric oxide synthase activation on accelerated liver regeneration in a rat ALPPS model

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World Journal of Gastroenterology 2023年第5期29卷 867-878页

作者： Hitoshi Masuo Akira Shimizu Hiroaki Motoyama koji Kubota Tsuyoshi Notake Takahiro Yoshizawa Kiyotaka Hosoda Koya Yasukawa Akira Kobayashi Yuji Soejima Division of Gastroenterological Hepato-Biliary-PancreaticTransplantation and Pediatric SurgeryDepartment of SurgeryShinshu University School of MedicineMatsumoto 390-8621Japan

BACKGROUND Although the associating liver partition and portal vein ligation for staged hepatectomy(ALPPS)induces more rapid liver regeneration than portal vein embolization,the mechanism remains *** To assess the influence of inflammatory cytokines and endothelial nitric oxide synthase(eNOS)activation on liver regeneration in *** The future liver remnant/body weight(FLR/BW)ratio,hepatocyte proliferation,inflammatory cytokine expression,and activation of the Akt-eNOS pathway were evaluated in rat ALPPS and portal vein ligation(PVL)*** proliferation was assessed based on Ki-67 expression,which was confirmed using *** serum concentrations of inflammatory cytokines were measured using enzyme linked immune-solvent *** Akt-eNOS pathway was assessed using western *** explore the role of inflammatory cytokines and NO,Kupffer cell inhibitor gadolinium chloride(GdCl3),NOS inhibitor N-nitro-arginine methyl ester(L-NAME),and NO enhancer molsidomine were administered *** The ALPPS group showed significant FLR regeneration(FLR/BW:1.60%±0.08%,P<0.05)compared with that observed in the PVL group(1.33%±0.11%)48 h after *** the ALPPS group,serum interleukin-6 expression was suppressed using GdCl3 to the same extent as that in the PVL ***,the FLR/BW ratio and Ki-67 labeling index were significantly higher in the ALPPS group administered GdCl3(1.72%±0.19%,P<0.05;22.25%±1.30%,P<0.05)than in the PVL group(1.33%±0.11%and 12.78%±1.55%,respectively).Phospho-Akt Ser473 and phospho-eNOS Ser1177 levels were enhanced in the ALPPS group compared with those in the PVL *** was no difference between the ALPPS group treated with L-NAME and the PVL group in the FLR/BW ratio and Ki-67 labeling *** the PVL group treated with molsidomine,the FLR/BW ratio and Ki-67 labeling index increased to the same level as in the ALPPS *** Early induction of inflammatory cytokines may n

关键词： Hepatectomy Nitric oxide Liver regeneration Cytokines NG-Nitroarginine methyl ester Molsidomine

Investigation of Inspiratory Circuit Condensation due to Room Temperature in a Heated Humidifier during Mechanical Ventilation

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Open Journal of Emergency Medicine 2022年第4期10卷 176-182页

作者： koji Konishi Satoki Inoue Masahiko Kawaguchi Department of Clinical Engineering Nara Medical University Hospital Nara Japan Department of Anesthesiology Fukushima Medical University Hospital Fukushima Japan Department of Anesthesiology Nara Medical University Hospital Nara Japan

Heating and humidification control during mechanical ventilation is important. Water condensation can occur due to insufficient humidification. Condensation in the breathing circuit can cause various adverse events. In this study, we investigated whether the occurrence of tubing condensation in the breathing circuit could be affected by room temperature using a simulated respiratory circuit with a humidifier. The room temperature was set at 23°C, 25°C, and 27°C, and mechanical ventilation was performed for 8 h. The inspired gas was appropriately heated and humidified according to the manufacturer’s instructions. The weight of the circuit was measured every 2 h at room temperature to estimate the amount of condensation. During the mechanical ventilation, condensation continued to increase at a room temperature of 23°C, but only for the first 2 h at 25°C, and did not occur at 27°C. The room temperature of the indoor environment was one of the factors generating water condensation in the breathing circuit with a humidifier even when a heater wire in the breathing circuit was appropriately operated.

关键词： Room Temperature Heated Humidifier Mechanical Ventilation

Regulation of RIG-I-like receptor-mediated signaling:interaction between host and viral factors

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Cellular & Molecular Immunology 2021年第3期18卷 539-555页

作者： koji Onomoto Kazuhide Onoguchi Mitsutoshi Yoneyama Division of Molecular Immunology Medical Mycology Research CenterChiba University1-8-1InohanaChuo-kuChiba 260-8673Japan

Retinoic acid-inducible gene I(RIG-l)-like receptors(RLRs)are RNA sensor molecules that play essential roles in innate antiviral *** the three RLRs encoded by the human genome,RIG-1 and melanoma differentiation-associated gene 5,which contain N-terminal caspase recruitment domains,are activated upon the detection of viral RNAs in the cytoplasm of virus-infected *** RLRs induce downstream signaling via their interactions with mitochondrial antiviral signaling proteins and activate the production of type Ⅰ and Ⅲ interferons and inflammatory *** studies have shown that RLR-mediated signaling is regulated by interactions with endogenous RNAs and host proteins,such as those involved in stress responses and posttranslational *** RLR-mediated cytokine production is also involved in the regulation of acquired immunity,the deregulation of RLR-mediated signaling is associated with autoimmune and autoinflammatory ***,RLRmediated signaling might be involved in the aberrant cytokine production observed in coronavirus disease *** the discovery of RLRs in 2004,significant progress has been made in understanding the mechanisms underlying the activation and regulation of RLR-mediated signaling ***,we review the recent advances in the understanding of regulated RNA recognition and signal activation by RLRs,focusing on the interactions between various host and viral factors.

关键词： RIG-I-like receptors Viral infection Innate immunity Stress response

Effects of Kampo medicine, Keishi-ka Shakuyaku-to (TJ-60) on alteration of diacylglycerol metabolism in gastrointestinal smooth muscle of diabetic rats

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Acta Pharmacologica Sinica 2002年第12期23卷 120-127页

作者： NOBE koji,MOMOSE Kazutaka,SAKAI Yasushi Showa University 1-5-8 Hatanodai Shinagawa-ku Tokyo 142-8555 Japan Division of Physiology Department of Occupational Therapy Shool of Nursing and Rehabilitation Sciences Showa University 1865 Taka-Ichiba Department of Pharmacology Midori-ku Yokohama Kanagawa 226-8555 Japan School of Pharmaceutical Sciences Showa University 1-5-8 Hatanodai Shinagawa-ku Tokyo 142-8555 Japan Department of Pharmacology School of Pharmaceutical Sciences

AIM: To examine the effects of Kampo medicine, Keishi-ka-Shakuyaku-to (TJ-60) on the signal transduction in diabetic gastrointestinal dysfunction. METHODS: Experimental diabetic models were prepared using streptozotocin (STZ)-treated Wistar rats. Randomly selected STZ rats were treated with insulin (12 U·kg-1·d-1) or TJ-60 (1% of food intake). Diacylglycerol (DG) and DG kinase activities were quantified in isolated aortic smooth muscle tissue. RESULTS: One of the key element of the Pi-turnover, DG kinase activity in resting state in gastric smooth muscle was significantly increased compared to the control value, and carbachol (CCh)-induced response was not detectable, but it was detected in the control rats. On the other hand resting activity in ileum did not differ from the control, but the CCh-induced responses were suppressed. Treatment with TJ-60 indicated resistant effects for the alteration of DG kinase activities in diabetic intestinal tissues. In order to reveal the mechanism of the effects, t

关键词： diabetes mellitus Keshi-ka-Shakuyaku-to gastrointestinal smooth muscle herbal medicine muscle contraction diacylglycerol kinase signal transduction