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EFFECT OF SOLUTION EXTRUSION RATE ON MORPHOLOGY AND PERFORMANCE OF POLYVINYLIDENE FLUORIDE HOLLOW FIBER MEMBRANES USING POLYVINYL PYRROLIDONE AS AN ADDITIVE

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Chinese Journal of Polymer Science 2010年第4期28卷 527-535页

作者：陈文清 makoto Onishi Naoki Abe Department of Environment Science and Engineering College of Architecture and EnvironmentSichuan University SCU-HITACHI Environment Applied Technology Research Center Sichuan University Hitachi Plant Technologies LtdTokyo 170-8466Japan

Polyvinylidene fluoride （PVDF） hollow fiber membranes prepared from spinning solutions with different polyvinyl pyrrolidone （PVP） contents （1% and 5%） at different extrusion rates were obtained by wet/dry phase process keeping all other spinning parameters constant. In spinning these PVDF hollow fibers, dimethylacetamide （DMAc） and PVP were used as a solvent and an additive, respectively. Water was used as the inner coagulant. Dimethylformamide （DMF） and water （30/70） were used as the external coagulant. The performances of membranes were characterized in terms of water flux, solute rejection for the wet membranes. The structure and morphology of PVDF hollow fiber were examined by BET adsorption, dry/wet weight method and scanning electron microscopy （SEM）. It is found that the increase in PVP content and extrusion rate of spinning solution can result in the increase of water flux and decrease of solute rejection. The improvements of interconnected porous structure and pore size are induced by shear-thinning behavior of spinning solution at high extrusion rates, which could result in the increase of water flux of hollow fiber membranes. The increase of extrusion rate also leads to the increase of membrane thickness due to the recovery effect of elastic property of polymer chains.

关键词： Polyvinylidene fluoride Polyvinyl pyrrolidone Hollow fiber Extrusion rate

Layered alkali titanates(A_(2)Ti_(n)O_(2n+1)):possible uses for energy/environment issues

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Frontiers in Energy 2021年第3期15卷 631-655页

作者： Taya(Ko)SAOTHAYANUN Thipwipa(Tip)SIRINAKORN makoto OGAWA School of Energy Science and Engineering Vidyasirimedhi Institute of Science and Technology(VISTEC)WangchanRayong 21210Thailand School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology(VISTEC)WangchanRayong 21210Thailand

Uses of layered alkali titanates(A_(2)Ti_(n)O_(2n+1);Na_(2)Ti_(3)O_(7),K_(2)Ti_(4)O_(9),and Cs_(2)Ti_(5)O_(11))for energy and environmental issues are *** alkali titanates of various structural types and compositions are regarded as a class of nanostructured materials based on titanium oxide *** compared with commonly known titanium dioxides(anatase and rutile),materials design based on layered alkali titanates is quite versatile due to the unique structure(nanosheet)and morphological characters(anisotropic particle shape).Recent development of various synthetic methods(solid-state reaction,flux method,and hydrothermal reaction)for controlling the particle shape and size of layered alkali titanates are *** ion exchange ability of layered alkali titanate is used for the collection of metal ions from water as well as a way of their *** possible materials design made layered alkali titanates promising for energy(including catalysis,photocatalysts,and battery)and environmental(metal ion concentration from aqueous environments)applications.

关键词： layered alkali titanates photocatalysis hydrogen evdution metal ions collection

Development of gradient microstructure in the lattice structure of AlSi10Mg alloy fabricated by selective laser melting

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Journal of Materials Science & Technology 2020年第1期36卷 106-117页

作者： Mulin Liu Naoki Takata Asuka Suzuki makoto Kobashi Department of Materials Process Engineering Graduate School of EngineeringNagoya UniversityFuro-choChikusa-kuNagoya464-8603Japan

To identify the microstructural features of the lattice structures of Al alloys built via the selective laser melting(SLM)process,AlSil OMg alloy with a body-centered cubic(BCC)-type lattice structure was *** microstructures comprising melt pools with several columnarα-Al phases withorientations along the elongation direction and surrounded by eutectic Si particles were observed at all portions of the built lattice *** the node portions of the lattice structure,a gradient microstructure(continuous change in microstructure)was *** columnarα-Al phases were observed near the top surface of the node portion,whereas they became coarser and more equiaxed near the bottom surface,resulting in softening localized near the bottom *** the strut portions of the lattice structure,the columnarα-Al phases were elongated along the inclined direction of *** trend was more prevalent near the bottom ***α-Al phases became coarser and more equiaxed near the bottom surface as *** aforementioned results were the basis of a discussion of the development of the gradient microstructure in lattice-structured Al alloys during the SLM process in terms of thermal conductivities at the boundaries between the manufactured(locally melted and rapidly solidified)portions and adjacent(unmelted)alloy powder.

关键词： Additive manufacturing Lattice structure Aluminum alloy Microstructure Thermal conductivity

Early apoptosis and cell death induced by ATX-S10Na(Ⅱ)-mediated photodynamic therapy are Bax- and p53-dependent in human colon cancer cells

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World Journal of Gastroenterology 2007年第5期13卷 692-698页

作者： makoto Mitsunaga Akihito Tsubota Kohichi Nariai Yoshihisa Namiki makoto Sumi Tetsuya Yoshikawa Kiyotaka Fujise Institute of Clinical Medicine and Research Jikei University School of Medicine Kashiwa Chiba Japan Division of Gastro-enterology and Hepatology Department of Internal Medicine Jikei University School of Medicine Tokyo Japan Institute of Clinical Medicine and Research Jikei University School of Medicine Kashiwa Chiba Japan

AIM： To investigate the roles of Bax and p53 proteins in photosensitivity of human colon cancer cells by using lysosome-localizing photosensitizer, ATX-S10Na （Ⅱ）. METHODS： HCT116 human colon cancer cells and Bax-null or p53-null isogenic derivatives were irradiated with a diode laser. Early apoptosis and cell death in response to photodynamic therapy were determined by MTT assays, annexin Ⅴ assays, transmission electron microscopy assays, caspase assays and western blotting. RESULTS： Induction of early apoptosis and cell death was Bax- and p53-dependent. Bax and p53 were required for caspase-dependent apoptosis. The levels of anti-apoptotic Bcl-2 family proteins, Bcl-2 and Bcl-xL, were decreased in Bax- and p53-independent manner. CONCLUSION： Our results indicate that eady apoptosis and cell death of human colon cancer cells induced by photodynamic therapy with lysosome-localizing photosensitizer ATX-S10Na （Ⅱ） are mediated by p53- Bax network and low levels of Bcl-2 and Bcl-xL proteins. Our results might help in formulating new therapeutic approaches in photodynamic therapy.

关键词： Photodynamic therapy ATX-S10Na (Ⅱ) Apoptosis Bax p53

Future perspectives on cell therapy for autism spectrum disorder

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BIOCELL 2022年第4期46卷 873-879页

作者： makoto NABETANI TAKEO MUKAI Department of Pediatrics Yodogawa Christian HospitalOsaka533-0024Japan Department of Cell Processing and Transfusion The Institute of Medical ScienceThe University of TokyoTokyo108-8639Japan

Autism spectrum disorder(ASD)is a complex neurodevelopmental condition characterized by impairments in social communication,abnormal to absent verbal communication,the presence of repetitive stereotypic verbal and nonverbal behaviors and restricted interests,with onset early in *** showed cognitive and behavioral characteristics of ASD by impairment of communication,cognition,perception,motor skills,executive function,theory of mind and emotion ***,pathogenesis of immune pathology in the brains of individuals with ASD has been *** therapeutic approaches in the viewpoints of immune modulation and microglial function are logical for novel treatments for individuals with *** therapies such as umbilical cord blood cells and mesenchymal stromal cells for ASD will be a challenging and encouraging field in the future clinical study with progress of biotechnological science.

关键词： Autism ASD Cell therapy Umbilical cord blood cells MSC Mesenchymal stromal cells

Expression pattern of leptin and leptin receptor (OB-R) in human gastric cancer

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World Journal of Gastroenterology 2006年第34期12卷 5517-5522页

作者： makoto Ishikawa Joji Kitayama Hirokazu Nagawa Department of Surgery Division of Surgical Oncology theUniversity of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8655Japan

AIM: To examine the expression of leptin and its receptor, OB-R, in normal gastric mucosa and neoplasia. METHODS: By immunohistochemical staining using specifi c antibodies, we evaluated the expression of leptin and OB-R in 207 gastric carcinomas (100 early and 107 advanced carcinomas) and analyzed their relationship with clinicopathological features. RESULTS: Both normal gastric epithelium and carci- noma cells expressed a significant level of leptin. In cases with OB-R staining, carcinoma cells showed OB-R- positive expression, but the intensity was weaker than that in normal mucosa. The expression of OB-R showed a signifi cant correlation with the level of leptin expres- sion. The expression levels of both leptin and OB-R tend- ed to increase as the depth of tumor invasion or TMN stage increased (P < 0.01). Lymph node metastasis was detected in 49.5% (47/95) of leptin-strong cases and in 50.5% (48/95) of OB-R-positive cases, and the rate was 33% (37/112) in leptin-weak cases and 17% (19/112) in OB-R-negative cases. Both venous and lymphatic inva- sion also tended to be observed frequently in positive tumors as compared with negative tumors. Interestingly, in the 96 leptin- or OB-R-positive tumors, hematogenous metastasis was detected preoperatively in 3 (3.1%) pa- tients. In contrast, none of the carcinomas that lacked expression of leptin and OB-R showed hematogenous metastasis. CONCLUSION: Overexpression of leptin and expres- sion of OB-R may play a positive role in the process of progression in gastric cancer. Functional upregulation of leptin/OB-R may have a positive role in the development and initial phase of progression in gastric cancer.

关键词： Leptin OB-R Gastric cancer

High entropy state of orientationally-disordered clusters in Zr-based bulk metallic glass

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Progress in Natural Science:Materials International 2010年第1期20卷 87-96页

作者： Akira TAKEUCHI makoto OGATA Akihisa INOUE World Premier International Research Center Tohoku University 2-1-1KatahiraAoba-kuSendai 980-8577Japan Graduate School of Engineering Tohoku University AramakiAoba-kuSendai 980-9482Japan Current affiliation:Materials Research Laboratory Hitachi Ltd. 1-1Omika-cho 7-chomeHitachi-shi319-1292Japan

A phase transformation of a metastable Zr2Ni intermetallic crystalline phase to vitrify was studied with molecular dynamics(MD)simulations based on a plastic crystal model(PCM),which utilizes the orientational disorder of molecules of plastic crystals in a class of soft *** simulation results showed that computational operations in MD-PCM for the random rotations of the clusters in the crystalline phase around their center of gravity and subsequent annealing lead to form a dense random packing structure from the metastable Zr2Ni *** randomly-rotated clusters provide high degrees of freedom in terms of atomic positions,which results in enhancing the glass-forming ability of the *** critical fraction of the number of rotated clusters for forming the glassy phase(fc~R)is evaluated to be ***,the critical fraction of the number of un-rotated clusters(fc~U=1-fc~R) is close to the critical concentration of site percolation for metallic *** mechanism of the metastable Zr2Ni phase to vitrify with increasing f~R was analyzed with a concept of communal entropy in the free volume theory with solid-and liquid-like cells proposed by Cohen and *** MD-PCM for the metastable Zr2Ni phase suggests that Zr-based bulk metallic glass(BMG)can be regarded as an alloy in a high rotation entropy state of clusters and that glass transition takes place by percolation of the nuclei of a liquid-like glassy phase.

关键词： metallic glass molecular dynamics simulation plastic crystal percolation communal entropy

Good Memories of *** Jiang and International Conference on Fine Chemistry and Functional Polymers:Fruitful Discussions Resulted in Excellent Findings

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高分子通报 2014年第12期 5-8页

作者： makoto SHIMIZU Department of Chemistry for Materials Graduate School of EngineeringMie University

About 15years have passed since I first attended the International Conference on Fine Chemistry and Functional Polymers(FCFP).One day,I was asked by *** of Kanazawa University to attend the conference,and after a while *** sent me a kind invitation *** is the beginning of my first trip to *** of Osaka University was also very active

关键词： invitation asked letter passed attended beginning imino esters accomplishment unsaturated

Information for Disaster Preparedness: A Social Network Approach to Rainwater Harvesting Technology Dissemination

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International Journal of Disaster Risk Science 2014年第2期5卷 95-109页

作者： Subhajyoti Samaddar makoto Murase Norio Okada Disaster Prevention Research Institute Kyoto UniversityGokashoUjiKyoto 6110011Japan Institute for Sky Water Harvesting 1201-2 FukasawaGotemba CityShizuoka Prefecture 4120023Japan Institute for the Research of Disaster Area Reconstruction Kwansei Gakuin UniversityHyogo 6628501Japan

Rainwater harvesting technology is considered an innovative and effective mechanism for reducing drinking water risks due to arsenic contamination and water salinity in coastal Bangladesh. However, adoption of such tanks remains elusive. Most studies on disaster risk communication are predominantly based on individuallevel cognitive modeling approaches, which fail to address the role of social groups, human relations, and other collective social factors in the dissemination process of disaster preventive measures. From the viewpoint of social implementation, community adoption of unfamiliar technology for disaster risk mitigation and preparedness requires another approach. Given the challenge to promote rainwater harvesting technology in the study area of coastal Bangladesh, this study examines the role of various social networks including cohesive groups(friends), structural equivalent groups(individuals who have the same position in society), and spatial groups(neighbors) in three information sharing and processing activities—hearing, observation, and discussion. Results show that those individuals who have similar cohesive affiliations tend to become hearing and discussion partners. Cohesive groups share a learning opportunity and are bounded by normative constraints in terms of direct and intimate social *** groups facilitate observation, which provides visual learning. Structurally equivalent groups are not relevant in adoption dissemination;therefore competition or similar social environment did not influence the rainwater tank dissemination activities.

关键词： disaster harvesting tank