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氮离子注入TiNi形状记忆合金表面改性

中国有色金属学报 2006年第3期16卷 412-416页

作者：冷崇燕浅岡照夫周荣昆明理工大学材料与冶金工程学院昆明650093 东京电机大学知能机械工学科昆明理工大学机电工程学院昆明650093

采用1×1016ions/cm2的注入剂量对TiNi形状记忆合金进行氮离子注入,注入加速电压为50 keV。采用X射线衍射和X射线光电子能谱对氮离子注入前后TiNi形状记忆合金表面的物相以及化学成分进行了分析。结果表明,氮离子注入前后TiNi合金表面... 详细信息

采用1×1016ions/cm2的注入剂量对TiNi形状记忆合金进行氮离子注入,注入加速电压为50 keV。采用X射线衍射和X射线光电子能谱对氮离子注入前后TiNi形状记忆合金表面的物相以及化学成分进行了分析。结果表明,氮离子注入前后TiNi合金表面都被氧化。氮离子注入前TiNi形状记忆合金表面存在少量TiO2、Ti3O5和Ti2O3。氮离子注入后的TiNi形状记忆合金表面有TiN新相生成,且在氮离子注入后的TiNi形状记忆合金表面还存在少量TiO2、Ti3O5。

关键词： TiNi形状记忆合金表面分析氮离子注入

Effects of dissolved organic matter on the growth and pigments synthesis of Spirulina platensis (Arthrospira)

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Progress in Natural Science:Materials International 2006年第1期16卷 50-54页

作者： WATANABE teruo China Hainan DIC Microalgae Co. Ltd. Haikou International Commercial Centre 38 Haikou 570102

Excessive accumulation of dissolved organic matter (DOM) in the culture ponds of Spirulina platensis is usually considered to be one of the potential factors affecting the production of S. platensis, however, we are not quite aware of effects of DOM on the growth and pigments synthesis of S. platensis. In the present study, S. platensis was grown in batch or semi-continuous cultures using the filtrate in the culture ponds that had not been renewed for years. It was found that disssolved organic carbon up to 60 mg/L did not bring about an inhibitory effect on the growth of S. platensis, but increased the contents of chlorophyll a and phycocyanin instead. However, further accumulation of dissolved organic matter could decrease the content of chlorophyll a .

关键词： Chl a dissolved organic matter PC specific growth rate Spirulina platensis (Arthrospira).

Effects of solar ultraviolet radiation on the photochemical efficiency, photosynthetic pigments and biomass production of Spirulina platensis

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Progress in Natural Science:Materials International 2005年第5期15卷 477-480页

作者： teruo WATANABE China Haikou 570102 Haikou International Commercial Centre 38 Hainan DIC Microalgae Co. Ltd.

Effects of solar ultraviolet radiation (UVR) on Spirulina platensis were studied by investigating its photochemical efficiency, photosynthetic pigments and biomass production while exposed to full spectrum solar radiation or depleted of UVR for understanding how and to what extent UVR influences its photosynthetic physiology and production. It was found that UVR brought about an extra inhibition of photochemical efficiency by 26%—30%. The greatest inhibition of photochemical efficiency in S. platensis was observed at noontime, and then recovered to some extent in late afternoon no matter which treatment they were exposed to. The contents of chlorophyll a, phycocyanin and carotenoids increased during initial stage of the exposure, but decreased with elongated exposure. UVR decreased the biomass yield by about 6%. It indicated that filtering out UVR of solar radiation would raise the productivity of S. platensis, which is an important factor that should be considered in the production.

关键词： ultraviolet radiation Spirulina platensis photochemical efficiency biomass production pigments.

Synthesis of organic-inorganic 3D-nanocontainers for smart corrosion protection of friction stir welded AZ31B magnesium alloy-titanium dissimilar joints

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Journal of Magnesium and Alloys 2024年第9期12卷 3589-3601页

作者： Sepideh Aliasghari teruo Hashimoto Peter Kelly Allan Matthews Henry Royce Institute Department of MaterialsThe University of ManchesterManchesterM139PLUK Department of Materials The University of ManchesterManchesterM139PLUK Surface Engineering Group Department of EngineeringManchester Metropolitan UniversityManchesterM15GDUK

The joining of different light metals through friction stir welding(FSW)is gaining interest as a method to decrease weight and improve fuel ***,to ensure durability,these welded metals may require surface treatments to protect against corrosion or *** study presents a novel approach for the simultaneous delivery of two distinct corrosion inhibitors to Ti-Mg dissimilar PEO treated joints on *** research focuses on the synthesis,characterization,and application of cerium@polystyrene(Ce@PS)nanocontainers,which are loaded with 8-hydroxyquinoline(8-HQ)to enhance corrosion *** synthesis involves several key steps,including the formation of a cerium-based outer layer around polystyrene nanospheres,the selective removal of the polystyrene core to create a porous structure,and the subsequent loading of the 8-HQ *** and compositional analyses,conducted using scanning transmission electron microscopy(STEM)and energy-dispersive X-ray spectroscopy(EDS),confirmed the successful incorporation of 8-HQ within the ***,Fourier-transform infrared spectroscopy(FTIR)provided detailed information about the chemical composition of the organic materials throughout the synthesis *** decomposition analysis verified the successful fabrication and stability of the dual-shell *** tests on Ti-Mg joints treated with plasma electrolytic oxidation(PEO)coatings and loaded nanocontainers demonstrated sig-nificantly improved corrosion resistance compared to untreated *** research highlights the potential of dual-shell nanocontainers,containing both organic and inorganic inhibitors,to offer prolonged corrosion protection,particularly against galvanic corrosion in dissimilar *** findings suggest that these synthesized nanocontainers hold promise for various industrial applications,particularly in the context of friction stir welded(FSW)Ti-Mg dissimilar joints,providing valuable

关键词： AZ31B Magnesium Dissimilar joint Two-shell inhibitors Smart corrosion protection

Numerical study on 3D effect and practical design in shield tunneling

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Underground Space 2019年第3期4卷 201-209页

作者： Hossain Md.Shahin teruo Nakai Tetsuo Okuno Islamic University of Technology GazipurBangladesh Geo-Research Institute Japan Nagoya Institute of Technology NagoyaJapan Shimizu Corporation TokyoJapan

In practice,different design methods are used in solving geotechnical problems depending on the type of issue such as the tunneling,braced excavation,or bearing capacity of a foundation,that is,the basic mechanism of the design method differs depending on the problems even for the same ground.A numerical analysis using the finite element method has recently become familiar owing to an improved computing performance;however,it is not widely used in the design of geotechnical problems including tunnel excavation owing to the reliability of the constitutive model of the ground *** a constitutive model of soils can properly express the properties of the ground material,a numerical analysis will play a vital role in solving the geotechnical *** this paper,the current state of a numerical analysis and its applicability in tunnel design are ***,the simulation of the ground behavior during tunnel excavation is carried out using sandy and clay ground parameters for shallow and deep tunnel *** paper is mainly focused on the effects of tunnel excavation under three-dimensional(3D)conditions,as well as the current design ***-linear 2D and 3D finite element analyses have been conducted,in which the elastoplastic sub-loading tij model has been used as a constitutive model of the *** performance and acceptability of the constitutive model have already been proven to reproduce the results of various model tests on different geotechnical problems such as the tunneling,braced excavation,and bearing capacity of a foundation,as well as the measured field *** was found that a 2D finite element analysis where the rate of stress release is considered,can be used for the prediction of the ground deformation and surface settlement;however,it does not provide rational information in the prediction of tunnel lining forces such as the stress,bending moment,and axial force,which emphasize the necessity of a 3D analysis with a proper cons

关键词： Shield tunneling Finite element analysis 3D effect

Recent development of temperature-responsive surfaces and their application for cell sheet engineering

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Regenerative Biomaterials 2014年第1期1卷 91-102页

作者： Zhonglan Tang teruo Okano Institute of Advanced Biomedical Engineering and Science TWInsTokyo Women’s Medical University8-1 Kawada-choShinjuku-kuTokyo 162-8666Japan

Cell sheet engineering,which fabricates sheet-like tissues without biodegradable scaffolds,has been proposed as a novel approach for tissue *** have been cultured and proliferate to confluence on a temperature-responsive cell culture surface at 37℃.By decreasing temperature to 20℃,an intact cell sheet can be harvested from the culture surface without enzymatic *** new approach enables cells to keep their cell–cell junction,cell surface proteins and extracellular ***,recovered cell sheet can be easily not only transplanted to host tissue,but also constructed a three-dimensional(3D)tissue by layering cell ***,cell sheet manipulation technology and bioreactor have been combined with the cell sheet technology to fabricate a complex and functional 3D tissue in *** far,cell sheet technology has been applied in regenerative medicine for several tissues,and a number of clinical studies have been *** this review,recent advances in the preparation of temperature-responsive cell culture surface,the fabrication of organ-like tissue and the clinical application of cell sheet engineering are summarized and discussed.

关键词： poly(N-isoproplyacrylamide) temperature-responsive cell culture surface cell sheet cell sheet engineering

Regenerative medicine of cornea by cell sheet engineering using temperature-responsive culture surfaces

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Chinese Science Bulletin 2013年第35期58卷 4349-4356页

作者： UMEMOTO Terumasa YAMATO Masayuki NISHIDA Kohji OKANO teruo Institute of Advanced Biomedical Engineering and Science Tokyo Women’s Medical University Tokyo 162-8666 Japan Department of Ophthalmology Osaka University Medical School Osaka 565-0871 Japan

Recently,regenerative medicine has been focused on as next-generation definitive therapies for several diseases or injuries for which there are currently no effective *** therapies have been rapidly developed through the effective fusion between different fields such as stem cell biology and *** far,we have proposed"cell sheet engineering"through our core technology that simply applies alterations of the temperature which allows regulation of the attachment or detachment of living cells on the culture surfaces grafted with the temperature-responsive polymer"poly(N-isoproplyacrylamide)".This technology enables us to construct bioengineered sheet-like tissues,termed"cell sheets",without the need of using biodegradable scaffolds and protease treatments that are traditionally ***,our carrier-free cell sheets not only are independent of the issues observed in conventional methods,but also showed further advantages in the reconstruction of the corneal epithelium or endothelium(*** of optical transparency and cell-cell interactions to host stroma in reconstructed tissues).Moreover,our approach does not have issues such as immune rejection or limited number of donors,due to the use of cell sheets derived from autologous limbal(in patients with unilateral disease)or oral mucosal epithelial cells(in patients with bilateral disorders).Indeed,we have successfully performed the clinical application for the reconstruction of ocular surfaces through the transplantation of our carrier-free corneal epithelial cell sheets,as evidenced by improved visual acuity as well as long-term maintenance of postoperative health conditions on ocular surfaces in all *** have also proposed a novel approach for the reconstruction of the corneal endothelium using corneal endothelial cell sheets by demonstrating its successful ***,our cell sheet engineering technique provides a breakthrough in the field of regenerative medicine appli

关键词：干细胞生物学角膜上皮表面重建再生医学调节温度工程化反应性角膜内皮细胞

Influence of synovia constituents on tribological behaviors of articular cartilage

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Friction 2013年第2期1卷 150-162页

作者： teruo MURAKAMI Seido YARIMITSU Kazuhiro NAKASHIMA Yoshinori SAWAE Nobuo SAKAI Research Center for Advanced Biomechanics Kyushu University744 MotookaNishi-kuFukuoka819-0395Japan Department of Mechanical Engineering Faculty of EngineeringKyushu University744 MotookaNishi-kuFukuoka819-0395Japan Department of Applied Science for Integrated System Engineering Graduate School of EngineeringKyushu Institute of Technology1-1SensuichoTobata-kuKitakyushu804-8550Japan

The extremely low friction and minimal wear in natural synovial joints appear to be established by effective lubrication mechanisms based on appropriate combination of articular cartilage and synovial *** complex structure of cartilage composed of collagen and proteoglycan with high water content contributes to high load-carrying capacity as biphasic materials and the various constituents of synovial fluid play important roles in various lubrication ***,the detailed differences in functions of the intact and damaged cartilage tissues,and the interaction or synergistic action of synovia constituents with articular cartilage have not yet been *** this study,to examine the roles of synovia constituents and the importance of cartilage surface conditions,the changes in friction were observed in the reciprocating tests of intact and damaged articular cartilage specimens against glass plate lubricated with lubricants containing phospholipid,protein and/or hyaluronic acid as main constituents in synovial *** effectiveness of lubricant constituents and the influence of cartilage surface conditions on friction are *** addition,the protectiveness by synovia constituents for intact articular cartilage surfaces is evaluated.

关键词： articular cartilage synovial fluid synovial joint lubrication biotribology

Biomimetic artificial cartilage:fibre-reinforcement of PVA hydrogel to promote biphasic lubrication mechanism

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Biosurface and Biotribology 2019年第1期5卷 13-19页

作者： Nobuo Sakai Seido Yarimitsu Yoshinori Sawae Mochimitsu Komori teruo Murakami Integrated Systems Engineering Kyushu Institute of TechnologyKitakyushuJapan Intelligent Mechanical Systems System DesignTokyo Metropolitan UniversityTokyoJapan Mechanical Engineering Kyushu UniversityFukuokaJapan Research Center for Advanced Biomechanics Kyushu UniversityFukuokaJapan Medical Technology Teikyo UniversityOmutaJapan

The fibre-reinforced structure in synovial articular cartilage plays an important role in enhancing the fluid load support in the biphasic lubrication ***(vinyl alcohol)(PVA)hydrogel is a potential biomimetic articular cartilage *** this study,PVA hydrogel was reinforced with PVA fibres to improve its frictional *** computational analysis,the position of the PVA fibre layer was examined with a migrating contact condition to reduce the friction *** improve the fibre reinforcement,a method for fibre placement was developed to retain the initial strain of the fibre in the hydrogel *** experimental results showed that the fibre-reinforced PVA hydrogel with a surface fibre layer had a low friction coefficient of 0.031 in pure *** fibre-reinforced PVA hydrogel successfully reduced friction coefficient.

关键词： mechanism. material. fibre