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54th SPSJ Annual Meeting 2005

作者： Oyane, Ayako Yokoyama, Hideaki Uchida, Masaki Ishizone, Takashi Furukawa, Katsuko Ushida, Takashi Tateishi, Tetsuya Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology Central 5 1-1-1 Higashi Tsukuba 305-8565 Japan Institute for Human Science and Biomedical Engineering National Institute of Advanced Industrial Science and Technology Central 6 1-1-1 Higashi Tsukuba 305-8566 Japan Department of Organic and Polymeric Materials Graduate School of Science and Engineering Tokyo Institute of Technology 2-12-1 Ookayama Meguro-ku Tokyo 152-8552 Japan Department of Mechanical Engineering Graduate School of Engineering University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Biomaterials Center National Institute for Materials Science 1-1 Namiki Tsukuba 305-0044 Japan

We have previously shown that a block copolymer (PS-PME3MA) of polystyrene (PS) and 2-[2-(2-methoxyethoxy) ethoxy]ethy1 methacrylate (PME3MA) exhibits good blood compatibility. It was found in the present study that PS-PME3MA blended with PS exhibited good blood compatibility analogous to pure PS-PME3MA even at the low PS-PME3MA concentration. This is because the water soluble PME3MA block is localized at the surface even in a blend of PS-PME3MA and PS, and the resultant hydrophilic surface effectively suppresses protein adsorption, cell and platelet adhesion via Brownian movement of the PME3MA block. In conclusion, PS-PME3MA and its blends with PS have great potential as blood-contacting biomaterials.

关键词： Surfaces

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Developing an atomic-level understanding of the mechanisms that govern CO2 sequestration mineral carbonation reaction processes

Developing an atomic-level understanding of the mechanisms t...

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2005 TMS Annual Meeting

作者： McKelvy, Michael J. Chizmeshya, Andrew V. G. Diefenbacher, Jason Béarat, Hamdallah Carpenter, R.W. Wolf, George Gormley, Deirdre Center for Solid State Science Arizona State University Tempe AZ 85287 United States Science and Engineering of Materials Graduate Program Arizona State University Tempe AZ 85287 United States Department of Chemistry and Biochemistry Arizona State University Tempe AZ 85287 United States

Mineral carbonation is an emerging CO2 sequestration candidate technology, which produces environmentally benign and geologically stable materials. The primary challenge is economically viable process development. Serpentine and olivine minerals are candidate feedstock materials of interest, due to their wide availability, low-cost, and rapid mineral carbonation potential. Cost-effectively enhancing their carbonation reactivity is critical to reducing mineral sequestration process cost. We will discuss our recent research into the mechanisms that govern serpentine and olivine mineral carbonation reaction processes, including in situ observations of the mineral carbonation process and a novel mechanistic approach to enhance carbonation reactivity that avoids the cost of mineral activation. Our goal is to develop the necessary atomic-level understanding to engineer improved carbonation materials and processes to reduce process cost.

关键词： Chemical reactions

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Surface plasmon resonance (SPR) study on the relationship between biorecognition of lactosyl PEGylated gold nanoparticle against RCA120 lectin and the chain length of the PEG strands

Surface plasmon resonance (SPR) study on the relationship be...

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54th SPSJ Symposium on Macromolecules

作者： Jinbo, Takao Takae, Seiji Akiyama, Yoshitsugu Otsuka, Hidenori Yamasaki, Yuichi Kataoka, Kazunori Department of Materials Science and Engineering University of Tokyo 7-3-1 Kongo Bunkyo-ku Tokyo 113-8656 Japan Biomaterials Center National Institute for Material Science 1-1 Namiki Tsukubasi Ibaraki 305-0044 Japan Division of Clinical Biotechnology Graduate School of Medicine University of Tokyo 7-3-1 Kongo Bunkyo-ku Tokyo 113-0093 Japan

To achieve in vivo active targeting of colloidal carriers, the introduction of ligand on the surface of the carrier was quite promising. In this study, as a model of ligand-installed colloidal carriers, lactosyl-PEGylated gold nanoparticles were employed. For the preparation of the nanoparticles, lactose-functionalized PEG disulfide dimer, (lactose-PEG-S)2, was newly synthesized through reductive amination. Then, lactosyl-PEGylated gold nanoparticles were prepared by the addition of gold nanoparticles to the mixture of the (lactose-PEG-S)2 and non-lactosyl-polymer, (PEG-S) 2, possessing various chain length. The binding amount of the nanoparticles against lectin-immobilized sensorchip was evaluated with SPR.

关键词： Polyethylene glycols

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Transistor characteristics of thermal chemical vapor deposition carbon nanotubes field emission triode

Journal of Vacuum Science & Technology B: Microelectronics a...

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Journal of Vacuum science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena 2005年第2期23卷 868-873页

作者： Y. M. Wong W. P. Kang J. L. Davidson W. Hofmeister S. Wei J. H. Huang Department of Electrical Engineering and Computer Science Vanderbilt University Nashville Tennessee 37235 Interdisciplinary Graduate Program in Material Science Vanderbilt University Nashville Tennessee 37235 Department of Materials Science and Engineering National Tsing Hua University Hsinchu 300 Taiwan Republic of China

A study of thermal chemical vapor deposition (CVD) grown carbon nanotubes (CNTs) field emitters in a triode amplifier configuration is reported. The CNT transistor characteristics were examined by integrating gate and anode with CNT cathode in two structural forms, utilizing a TEM grid (transmission electron microscope specimen holder) as the gate electrode and a micropatterned CNT with self-aligned gate. The TEM-grid CNT triode displayed clearly gate-controlled current modulation behavior with distinct cutoff, linear, and saturation regions, and a reasonable gate turn-on field of ∼5.4V∕μm despite a large cathode-gate spacing of ∼120μm . The field emission result established the basic transistor characteristics of CNTs in a triode configuration. A CNT triode construct with a self-aligned gated fabrication technique was also developed to realize a monolithic triode structure with shorter gate-cathode spacing, lowering gate voltage, and enhancing emission current. The triode exhibited a significantly lower gate turn-on voltage of ∼40V , and gate-controlled modulation of the emission current. An anode current density of ∼30mA∕cm2 was achieved at a gate voltage of ∼80V and an anode voltage of ∼200V . The dc characteristics for both of the CNT triodes were investigated, including Ia versus Va for different Vg . Moreover, dc parameters such as transconductance, amplification factors, and anode resistance of the triode amplifier were determined. The CNT triodes exhibited useful amplification factor and high output impedance.

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Biodegradation of multilayer silk fibroin and Hydroxyapatite composite material

Biodegradation of multilayer silk fibroin and Hydroxyapatite...

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54th SPSJ Symposium on Macromolecules

作者： Kino, Rikako Ikoma, Toshiyuki Yunoki, Shunji Monkawa, Akira Matsuda, Atsushi Kagata, Go Asakura, Tetsuo Munekata, Masanobu Tanaka, Junzo Hokkaido University Kita 21 Nishi 10 Kita-ku Sapporo 001-0021 Japan Biomaterials Center National Institute for Materials Science Namiki 1-1 Tsukuba Ibaraki 305-0044 Japan Department of Biotechnology Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan Facultay and Graduate School of Engineering Hokkaido University Kita 13 Nishi 9 Kita-ku Sapporo 060-8628 Japan

Silk fibroin films containing 5wt% of CaCl2 (SFF-5) were prepared by a cast-film method from the degummed SF and then immersed into the simulated body fluid (SBF) to deposit hydroxyapatite (HAp) crystals. The multilayer films of HAp and SFF (Slayers) or pure SFF (4 layers) were prepared by a thermo-compression method under 130°C for 4min and at 3MPa. The ratio of -sheet structure in both samples showed almost same value of 56 and 55%. The swelling ratio and in vitro biodegradation were examined by incubating in phosphate-buffered saline (PBS) with and without Protease XIV for 1 to 14 days. The changes of sample weight and its tensile strength were investigated. The biodegradation rate, calculated from its weight changes, indicated that the rate of pure multilayered SFF was higher than that of multilayered SFF containing HAp. It could be attributed to the adsorption of protease onto the HAp crystals and/or the inhibition of penetration of protease.

关键词： Silk

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Tissue engineered bone formation with polymer/ ceramic composites by press-and-baking method

Tissue engineered bone formation with polymer/ ceramic compo...

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作者： Jung, Youngmee Kim, Soo Hyun Kim, Sang-Soo You, Hee Jin Kim, Byoung-Soo Kim, Sukyoung Kim, Sang-Heon Kim, Young Ha Biomaterials Research Center Korea Institute of Science and Technology P.O.Box 131 Cheongryang Seoul 130-650 Korea Republic of Department of Chemical Engineering Hanyang University 17 Haengdang-dong Seongdonggu Seoul 133-791 Korea Republic of Interdisciplinary Program for Biochemical Engineering and Biotechnology Seoul National University San 56-1 Shilim-dong Kwanak-gu Seoul 151-742 Korea Republic of School of Materials Engineering Yeungnam University 214-1 Dae-dong Gyeongsangbuk-do 712-749 Korea Republic of

A novel process was developed to fabricate polymer/ceramic composites for bone tissue engineering. The mixture of polylactic acid (PLA), calcium metaphosphate (CMP), and NaCl were compressed and subsequently heated. After dissolving the NaCl salts, porous biodegradable polymer/ceramic composite scaffolds were formed. The characteristics of the scaffolds were compared to those of scaffolds fabricated using a conventional solvent casting method, in terms of pore structure, pore size distribution, and mechanical properties. The scaffolds were seeded by osteoblasts and cultured in vitro or implanted into nude mice subcutaneously for up to 5 weeks. Cells were better grown to form tissue-like structures on CMP/PLA composites fabricated by the Press-and-Baking method. In addition, the alkaline phosphatase activity of and calcium deposition in the scaffolds explanted from mice were enhanced significantly for the scaffolds by Press-and-Baking compared to them by solvent casting. Taken together, these results suggest that CMP promote cell differentiation and proliferation via direct interaction with cells in the CMP/PLA composites. This novel PLA/CMP composite will be applicable for bone tissue engineering to support and cell differentiation and growth.

关键词： Polymer matrix composites

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Reconffgurable protein matrices for prolonged neuroblasts patterning and retraction

Reconffgurable protein matrices for prolonged neuroblasts pa...

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2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology

作者： Zhu, Xiaoyue Mills, Kristen L. Peters, Portia R. Naruse, Keiji Csete, Marie E. Thouless, M.D. Takayama, Shuichi Department of Biomedical Engineering University of Michigan Ann Arbor MI 48109 United States Department of Mechanical Engineering University of Michigan Ann Arbor MI 48109 United States Department of Physiology Nagoya University Graduate School of Medicine Nagoya 466-8550 Japan Department of Anesthesiology Emory University School of Medicine Atlanta GA 30322 United States Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48109 United States Macromolecular Science and Engineering Program University of Michigan Ann Arbor MI 48109 United States

ISBN: (纸本)0780387112

Here we present long-term patterning and response studies of neuro blasts on arrays of extracellular matrix (ECM) protein lines fabricated by cracking a polymer-supported thin film and selectively depositing proteins inside the cracks. Neuroblasts cultured for five days on the protein matrix switched between spreading and retraction upon changing the protein line width. This technique provides a novel tool to pursue further understanding of the basic mechanisms of neuroblast pathfinding on adhesion and morphology. Biomedical device design will also benefit from materials engineered with the reconfigurable protein patterns. © 2005 IEEE.

关键词： Proteins

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Nanocrystalline material in toroidal cores for current transformer: Analytical study and computational simulations

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materials Research 2005年第4期8卷 395-400页

作者： Luciano, Benedito Antonio Cavalcante de Albuquerque, João Marcelo Benício de Castro, Walman Moreira Afonso, Conrado Ramos Department of Electrical Engineering CEEI/UFCG P.B. 10105 58109 970 Campina Grande - PB Brazil Department of Mechanical Engineering CCT/UFCG P.B. 10105 58109-970 Campina Grande - PB Brazil Department of Materials Engineering Pos-Graduate Program in Materials Science Engineering UFSCar Via Washington Luís km 235 13565-905 São Carlos - SP Brazil

Based on electrical and magnetic properties, such as saturation magnetization, initial permeability, and coercivity, in this work are presented some considerations about the possibilities of applications of nanocrystalline alloys in toroidal cores for current transformers. It is discussed how the magnetic characteristics of the core material affect the performance of the current transformer. From the magnetic characterization and the computational simulations, using the finite element method (FEM), it has been verified that, at the typical CT operation value of flux density, the nanocrystalline alloys properties reinforce the hypothesis that the use of these materials in measurement CT cores can reduce the ratio and phase errors and can also improve its accuracy class. © 2005.

关键词： Steel

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Abstracts of Presentations at the 2006 Fall Meeting of the Korean Society of Mycology at the Seoul Kyoyuk Munhwa Hoekwan, Seoul, Korea, October 19–20

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Mycobiology 2006年第4期34卷 249-261页

作者： Yong-Bo Lee Young-Hee Na Chae-Kyu Lim In-Hoa Jang Dong-Kyoung Jang Seong-Eun Yun Sin-Ae Park Sung-Hee Lim Hyeon-Na Cho Mi-Kyeong Lee Yue-Qin Xiao Young Jin Koh Jae-Seoun Hur Kwang-Mi Lim Yoshikazu Yamamoto Young-Ah Jeon Hyo-Jin Kim Myoung-Sook Shin Seung-Joo Go Seung-Beom Hong Duck-Hyun Cho Jin Sung Lee Hack Sung Jung Jae-Gu Han Hyeon-Dong Shin Young-Joon Choi Dae-Ho Kim Young-ah Jeon Seung-Ju Go Jong-Kyu Lee Kab-Yeul Jang Sun-Gyu Choi Won-Sik Kong Young-Bok Yoo Gyu-Hyun Kim Jae-Mo Sung Jin Hee Kim Ji Sun Lee Ji Young Seo Hyun-Su Rho Hyun Sook Lee Min Woong Lee U-Youn Lee Tae Soo Lee Min Woo Hyun Wook Ha Park Ji Hye Kim Jin Su Kim Seung Kyu Lee Kyung Hee Kim Seong Hwan Kim Imtiaj Ahmed Jayasinghe Chandana Sang Beom Kim Ji Yeon Oh Sam Nyu Jee Hojoung Lee Mun Il Ryoo Ki Deok Kim Sang Hyeon Park Ahn Heum Eom Narayan Chandra Paul Won Ki Kim Sung Kyoon Woo Yun Woo Jang Myung Soo Park Seung Hun Yu Miyeong Sim Ahn-Heum Eom Eun-Hwa Lee Suk Kim Yoo Mee Lee Eui Nam Kim Gun Woo Lee VU Van Hanh Suk Il Hong Keun Kim Keum Chul Shin Jong Kyu Lee Jong-Gab Jung Moo-Hee Mun Sang-Cheol Jun Kyu-Joong Kim Sang-Woo Kim Young-Jae Kim Eun-Jung Kim Ji-Seon Min Youn-Su Lee Seung-Bin Kim Moo-Young Jung Man-Su Yu Dong-Jun Kim Hak-Ro Youn Sung-Man Han Kye Seung Jang Yeo Hong Yun Hun Dal Yoo Hyo Sun Jang Chung Hwa Lee Je-O Lee Sang-Kuk Han Eun-Jeong Ham Bhushan Shrestha Ho-Kyoung Kim Tae-Woong Kim Won-Ho Lee Su-Young Lee Cheol-Soon Ko Beom-Suk Kim Jinju Kim Hyun-Sook Lee Hyeon-Su Ro Kwang-Joon Chang Kang-Hyeon Ka Hyeon Hur In-Pyo Hong Jae-Ouk Shim Tae-Soo Lee Ji-Yul Lee Min-Woong Lee Ji Hwan Yoon Ji Eun Park Hyun Seok Jo Dong Yeon Suh Seung Beom Hong Seung Ju Ko Heng Luo Mei Rong Ren Kwon-Il Seo Soon-Ok Rim Jin-Hyung Lee In-Joong Lee In-Koo Rhee Jong-Guk Kim Sun Hwa Ryu A Young Lee Hee Kyoung Sohn Myung Kil Kim Ja-Young Yoon Yun-Hee Park Hee-Moon Park Joong-Keun Lee Seung-Moon Park Moon-Sik Yang Tai-Boong Uhm Dae-Hyuk Kim In-Yeup Kim Chang-Sung Jhune Kwang-Ho Kim Young Bok Yoo Won Sik Kong Kab Yeul Jang In Yeup Kim Se Jong Oh Chang Sung Jhune Division of Science Education College of Education Chosun University Gwangju 501–759 Korea. Department of Herbal Medicine Resources Development Naju College Naju 520–713 Korea. Major in Biology Education Graduate School of Education Chosun University Gwangju 501–759 Korea Korean Lichen Research Institute Sunchon National University Sunchon 540–742 Korea. Department of Plant Medicine Sunchon National University Sunchon 540–742 Korea. Department of Environmental Education & Sciences Sunchon National Univerity Sunchon 540–742 Korea. Department of Biological Production Faculty of Bioresources Sciences Akita Prefectural University Japan. Korean Agricultural Culture Collection (KACC) National Institute of Agricultural Biotechnology Suwon 441–707 Korea. School of Biological Sciences Seoul National University Seoul 151–742 Korea Korean Agricultural Culture Collection National Institute of Agricultural Biotechnology RDA Suwon 441–707 Korea Department of Biology Woosuk University Wanju 565–701 Korea Polar Biocenter Korea Polar Research Institute KORDI Incheon 406–130 Korea. Department of Biological Sciences College of Natural Sciences Seoul National University Seoul 151–747 Korea Division of Environmantal Science and Ecological Engineering College of Life Sciences and Biotechnology Korea University Seoul 136–701 Korea Division of Environmental Science and Ecological Engineering College of Life Sciences and Biotechnology Korea University Seoul 136–701 Korea. Tree Pathology and Mycology Laboratory Division of Forest Resources Kangwon National University Chuncheon 200–701 Korea.Korean Agricultural Culture Collection National Institute of Agricultural Biotechnology RDA Suwon 441–707 Korea Tree Pathology and Mycology Laboratory Division of Forest Resources Kangwon National University Chuncheon 200–701 Korea. Applied Microbiology Division National Institute of Agricultural Science and Technology RDA Suwon 441–707 Korea. Forest Mushroom Research Center National

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Surface charge of bioactive polyethylene modified with -SO3H groups and its apatite inducing capability in simulated body fluid

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Key engineering materials 2005年 284-286卷 453-456页

作者： Leonor, I.B. Kim, H.-M. Balas, F. Kawashita, M. Reis, R.L. Kokubo, T. Nakamura, T. 3Bs Research Group-Biomaterials Biodegradables and Biomimetics University of Minho Campus de Gualtar 4710-057 Braga Portugal Department of Polymer Engineering University of Minho Campus de Azurém 4800-058 Guimarães Portugal Department of Material Chemistry Graduate School of Engineering Kyoto University Yoshida Sakyo-ku Kyoto 606-8501 Japan Department of Ceramic Engineering School of Advanced Materials Engineering Yonsei University Seoul 120-749 Korea Republic of Research Institute for Science and Technology Chubu University 1200 Matsumoto-cho Kasugai-shi Aichi 487-8501 Japan Department of Orthopaedic Surgery Faculty of Medicine Kyoto University Sakyo-ku Kyoto 606-8506 Japan

A bioactive polyethylene polymer substrate can be produced by incorporation of sulfonic functional groups (-SO3H) on its surface. Variation of the surface potential of the polyethylene modified with -SO3H groups with soaking in SBF were investigated using a laser electrophoresis zeta-potential analyzer. To complement the study using the. laser electrophoresis, the surface was examined by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy with an attached energy dispersive electron probe X-ray analyser (FE-SEM/EDS). It was found that the surface potential of the polyethylene was highly negative charged after soaking in SBF for 0.5 h, increased for higher soaking times (up to 48 h), and then decreased. The negative charge of the polymer at soaking time of 0.5 h is attributed to the presence of-SO3H groups on the surface. The initial increase in the surface potential was attributed to the incorporation of positively charged calcium ions to form a calcium sulphate, and then the subsequent decrease was assigned to the incorporation of negatively charged phosphate ions to form an amorphous calcium phosphate, which eventually transformed into apatite.

关键词： Polyethylenes

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