检索结果-南通市图书馆

Water purification with sintered porous materials fabricated at 400℃ from sea bottom sediments

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2008年第2期20卷 172-176页

作者： DABWAN Ahmed h A IMAI Daizo KANECO Satoshi SENMATSU Isamu NAKAhAMA Katsuyuki KATSUMATA hideyuki suzuki Tohru OhTA Kiyohisa Mie Industry and Enterprise Support Center ShimaMie 517-0501Japan Mie Industry and Enterprise Support Center ShimaMie 517-0501Japan Department of Chemistry for MaterialsGraduate School of EngineeringMie UniversityMie 514-8507Japan. Department of Chemistry for Materials Graduate School of EngineeringMie UniversityMie 514-8507Japan. Environmental Preservation Center Mie UniversityMie 514-8507Japan Department of Chemistry for Materials Graduate School of EngineeringMie UniversityMie 514-8507Japan. Environmental Preservation CenterMie UniversityMie 514-8507Japan

A sintering technology for preparing porous materials from sea bottom sediments was developed for use in water purification. The purpose of the present study was to develop methods for converting the sea bottom sediments dredged from Ago Bay into value-added recycled products. The sintered products fabricated at 400℃ were found to be very effective adsorbents for the removal of heavy metals.

关键词： sintering preparation technology porous materials sea bottom sediments water purification heavy metals

Potential therapeutic molecular targets for blood-brain barrier disruption after subarachnoid hemorrhage

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2019年第7期14卷 1138-1143页

作者： hideki Kanamaru hidenori suzuki Department of Neurosurgery Mie University Graduate School of Medicine

Aneurysmal subarachnoid hemorrhage remains serious hemorrhagic stroke with high morbidities and *** rupture causes arterial bleeding-induced mechanical brain tissue injuries and elevated intracranial pressure,followed by global cerebral ***-subarachnoid hemorrhage ischemia,tissue injuries as well as extravasated blood components and the breakdown products activate microglia,astrocytes and Toll-like receptor 4,and disrupt blood-brain barrier associated with the induction of many inflammatory and other *** blood-brain barrier is disrupted,brain tissues are directly exposed to harmful blood contents and immune cells,which aggravate brain injuries ***-brain barrier disruption after subarachnoid hemorrhage may be developed by a variety of mechanisms including endothelial cell apoptosis and disruption of tight junction *** molecules and pathways have been reported to disrupt the blood-brain barrier after subarachnoid hemorrhage,but the exact mechanisms remain *** independent and/or interconnected signaling pathways may be involved in blood-brain barrier disruption after subarachnoid *** review provides recent understandings of the mechanisms and the potential therapeutic targets of blood-brain barrier disruption after subarachnoid hemorrhage.

关键词： blood-brain barrier early brain injury endothelial cell subarachnoid hemorrhage tight junction inflammation matricellular protein Toll-like receptor 4 TLR4

Numerical Investigation on Super-cooled Large Droplet Icing of Fan Rotor Blade in Jet Engine

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2014年第5期23卷 432-437页

作者： Keisuke Isobe Masaya suzuki Makoto Yamamoto Graduate School of Mechanical Engineering Tokyo University of Science6-3-1 NiijukuKatsushika-kuTokyo125-8585Japan Aviation Program Group Japan Aerospace Exploration Agency(JAXA)7-44-1 Jindaiji Higashi-machiChofu-shiTokyo182-8522Japan Department of Mechanical Engineering Tokyo University of Science6-3-1 NiijukuKatsushika-kuTokyo125-8585Japan

Icing(or ice accretion) is a phenomenon in which super-cooled water droplets impinge and accrete on a *** is well known that ice accretion on blades and vanes leads to performance degradation and has caused severe *** various anti-icing and deicing systems have been developed,such accidents still ***,it is important to clarify the phenomenon of ice accretion on an aircraft and in a jet ***,flight tests for ice accretion are very expensive,and in the wind tunnel it is difficult to reproduce all climate conditions where ice accretion can ***,it is expected that computational fluid dynamics(CFD),which can estimate ice accretion in various climate conditions,will be a useful way to predict and understand the ice accretion *** the other hand,although the icing caused by super-cooled large droplets(SLD) is very dangerous,the numerical method has not been established *** is why SLD icing is characterized by splash and bounce phenomena of droplets and they are very complex in *** the present study,we develop an ice accretion code considering the splash and bounce phenomena to predict SLD icing,and the code is applied to a fan rotor *** numerical results with and without the SLD icing model are *** this study,the influence of the SLD icing model is numerically clarified.

关键词： Ice Accretion Fan Rotor Blade Super-cooled Large Droplet Multi-physics Simulation

Numerical Simulation of Sand Erosion Phenomena in Rotor/Stator Interaction of Compressor

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2008年第2期17卷 125-133页

作者： Masaya suzuki Kazuaki Inaba Makoto Yamamoto Department of Mechanical Engineering Tokyo University of Science

Sand erosion is a phenomenon where solid particles impinging to a wall cause serious mechanical damages to the wall surface. This phenomenon is a typical gas-particle two-phase turbulent flow and a multi-physics problem where the flow field, particle trajectory and wall deformation interact with each other. On the other hand, aircraft engines operating in a particulate environment are subjected to the performance and lifetime deterioration due to sand erosion. Especially, the compressor of the aircraft engines is severely damaged. The flow fields of the compressor have strongly three dimensional and unsteady natures. In order to estimate the deterioration due to sand erosion, the sand erosion simulation for a compressor is required under the consideration of the rotor-stator interaction. In the present study, we apply our three dimensional sand erosion prediction code to a single stage axial flow compressor. We numerically investigate the change of the flow field, the particle trajectories, and the eroded wall shape in the compressor, to clarify the effects of sand erosion in the compressor.

关键词： sand erosion axial compressor rotor/stator interaction computational fluid dynamics

Effects of uniaxial compressive strain on the electronic- transport properties of zigzag carbon nanotubes

在线全文

学校读者我要写书评

暂无评论

Nano Research 2016年第5期9卷 1267-1275页

作者： Masato Ohnishi Ken suzuki hideo Miura Fracture and Reliability Research Institute Graduate School of Engineering Tohoku University Sendai 980-8579 Japan

Recently, substantial attention has been paid to the strain sensitivity of the carbon nanotubes＇（CNTs＇） electronic properties. In this study, the relationships between the geometric structures and electronic states of zigzag CNTs under uniaxial compressive strain were investigated. We found that different factors dominate the electronic states of zigzag CNTs depending on the strain regions： the initial stage of the strain loading, which lasts until column-buckling deformation begins, and the strain regions corresponding to column- and shell-buckling deformations. Because shell-buckling deformation significantly increases the re-orbital angle, the angle between the π orbital axis vectors of adjacent atoms, strong localization of the density of states （LDOS） occurs in the buckled area. We also analyzed the current able to pass through deformed CNTs using a tight-binding-based Green＇s function approach and determined that the current can be significantly suppressed by applying uniaxial compressive strain. Our method of predicting the electronic state of a deformed CNT based on the π-orbital angle is expected to be useful for predicting the electronic properties of CNT-based electronic devices and sensors.

关键词： carbon nanotube strain buckling deformation Green's function method electronic-transport property

Lessons from tenascin-C knockout mice and potential clinical application to subarachnoid hemorrhage

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2019年第2期14卷 262-264页

作者： Masato Shiba hidenori suzuki Department of Neurosurgery Mie University Graduate School of Medicine

Subarachnoid hemorrhage by a ruptured cerebral aneurysmremains the most devastating cerebrovascular disorderswith high morbidity and mortality (suzuki et al.,2017), which are mainly caused by early brain injury anddelayed cerebral ischemia. Despite many experimentaland clinical research efforts, the mechanisms of earlybrain injury as well as delayed cerebral ischemia remainunclarified. however, recent works have suggested thattenascin-C, which is a special type of secreted extracellularmatrix proteins, is promising as a novel therapeutictarget against post-subarachnoid hemorrhage early braininjury and delayed cerebral ischemia.

关键词： cerebral clinical ischemia hemorrhage

Implications of periostin in the development of subarachnoid hemorrhage-induced brain injuries

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2017年第12期12卷 1982-1984页

作者： hirofumi Nishikawa hidenori suzuki Department of Neurosurgery Mie University Graduate School of Medicine Tsu Japan

Target of research in subarachnoid hemorrhage（SAh）：The outcome of aneurysmal SAh remains poor despite advances in the diagnosis and *** many factors related to patients,aneurysms,and institutions,as well as physiol... 详细信息

关键词： Implications of periostin the development subarachnoid hemorrhage-induced brain injuries

Numerical Investigation on Detonation Wave through U-bend

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2010年第6期19卷 540-544页

作者： Shinobu Otsuka Masaya suzuki Makoto Yamamoto Department of Mechanical Engineering Tokyo University of Science

Pulse detonation engine (PDE) is expected for a next-generation propulsion system. PDE is a promising engine that can generates power and thrust by using intermittent detonation. Promotion of deflagration to detonation transition (below DDT) is a key issue to realize this system. PDE has experimentally been investigated, and it was confirmed that detonation tubes with U-shaped bends are useful for fast DDT. however, the mechanism of DDT promotion due to U-bends has not been well clarified. In the present study, the influence of a U-bend on detona-tion wave propagation is researched with computational fluid dynamics (CFD). The numerical results show that detonation wave disappears once near the U-bend inlet and restarts after passing through it. In addition, it was found that the use of the U-bend with small channel width and curvature radius can induce fast DDT.

关键词： Detonation Deflagration to Detonation Transition (DDT) U-bend Computational Fluid Dynamics

Controllable fabrication of carbon aerogels

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2006年第z1期25卷 284-288页

作者： TANEMURA Sakae TANEMURA Masaki suzuki Kenzi Department of Environmental Technology & Urban Planning Nagoya Institute of Technology Showa-ku Nagoya 466-8555 Japan EcoTopia Science Institute Nagoya University Chikusa-ku Nagoya Japan

Nano-pore carbon aerogels were prepared by the sol-gel polymerization of resorcinol (1,3-dihydroxybenzene)(C6h4(Oh)2) with formaldehyde (hChO) in a slightly basic aqueous solution, followed by super-critical drying under liquid carbon dioxide as super-critical media and carbonization at 700 ℃ under N2 gas atmosphere. The key of the work is to fabricate carbon aerogels with controllable nano-pore structure, which means extremely high surface area and sharp pore size distribution. Aiming to investigate the effects of preparation conditions on the gelation process, the bulk density, and the physical and chemical structure of the resultant carbon aerogels, the molar ratio of R/C (resorcinol to catalyst) and the amount of distilled water were varied, consequently two different sets of samples, with series of R/C ratio and RF/W (Resorcinol-Formaldehyde to water, or the content of reactant) ratio, were prepared. The result of N2 adsorption/desorption experiment at 77 K shows that the pore sizes decreasing from 11.4 down to 2.2 nm with the increasing of the molar ratio of R/C from 100 to 400, and/or, the pore sizes decreasing from 3.8 down to 1.6 nm with the increasing of reactant content from 0.4 to 0.6.

关键词： resorcinol-formaldehyde aerogels carbon aerogels super-critical drying N2 adsorption/desorption