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2-[(Hydroxymethyl)amino]ethanol in water as a preservative: Study of formaldehyde released by Taguchi's method

IOP Conference Series: Earth and Environmental science 2016年第1期36卷

作者： W Wisessirikul S Loykulnant S Montha T Fhulua P Prapainainar Interdisciplinary Graduate Program in Advanced and Sustainable Environmental Engineering Thailand Advanced Institute of Science and Technology and Tokyo Institute of Technology Kasetsart University Bangkok 10900 Thailand Natural Rubber Focus Unit National Metal and Materials Technology Center NSTDA 111 Paholyothin Rd. Klong 1 Klong Luang Pathumthani 12120 Thailand Environment Research Unit National Metal and Materials Technology Center NSTDA 111 Paholyothin Rd. Klong 1 Klong Luang Pathumthani 12120 Thailand National Center of Excellence for Petroleum Petrochemicals and Advance Materials Department of Chemical Engineering Faculty of Engineering Kasetsart University Thailand Center of Excellence of Nanotechnology Kasetsart University Thailand

This research studied the quantity of free formaldehyde released from 2- [(hydroxymethyl)amino]ethanol (HAE) in DI water and natural rubber latex mixture using high-performance liquid chromatography (HPLC) technique. The quantity of formaldehyde retained in the solution was cross-checked by using titration technique. The investigated factors were the concentration of preservative (HAE), pH, and temperature. Taguchi's method was used to design the experiments. The number of experiments was reduced to 16 experiments from all possible experiments by orthogonal arrays (3 factors and 4 levels in each factor). Minitab program was used as a tool for statistical calculation and for finding the suitable condition for the preservative system. HPLC studies showed that higher temperature and higher concentration of the preservative influence the amount of formaldehyde released. It was found that conditions at which formaldehyde was released in the lowest amount were 1.6%w/v HAE, 4 to 40 °C, and the original pH. Nevertheless, the pH value of NR latex should be more than 10 (the suitable pH value was found to be 13). This preservative can be used to replace current preservative systems and can maintain the quality of latex for long-term storage. Use of the proposed preservative system was also shown to have reduced impact on the toxicity of the environment.

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Optical properties of thin VO2-films at the phase transition: Design aspects for a fiber-optic thermometer

Optical properties of thin VO2-films at the phase transition...

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2014 IEEE International Instrumentation and Measurement Technology Conference: Instrumentation and Measurement for Sustainable Development, I2MTC 2014

作者： Hermano, C.L. Lima, A.M.N. Almeida, L.A.L. Ferreira, C.L. Neff, H. Graduate Program in Electrical Engineering - PpgEE Department of Electrical Engineering Universidade Federal de Campina Grande Brazil Department of Electronic IF-AL Brazil Department of Electrical Engineering UFABC Brazil Department of Materials Science Instituto Militar de Engenharia - IME Brazil

ISBN: (纸本)9781467363853

The pronounced variation of the optical reflectance R of nanometer thin VO2 films with temperature T at the phase transition recently has triggered interest in the development of compact thermo-optical sensors that utilize optical fiber technology. Its immunity against electromagnetic interference effects makes this approach suited for an optical detection of local areas with increased temperature, i.e. so called hot spots, inside of high power transformers. Optical reflectance of thin VO2-films as function of T throughout the hysteretic phase transition is reported in this work. A modified version of the Preisach hysteresis model is utilized, and combined with experimental optical data. Suited VO2 film thickness values and wavelengths range for optimum sensor operation can be extracted. The achievable temperature range, as confirmed by experimental observations, is consistent with requirements that apply for power transformers of the first group, according to NBR 5416 (ABNT). © 2014 IEEE.

关键词： Optical properties

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A Ruthenium(III)–Oxyl Complex Bearing Strong Radical Character

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Angewandte Chemie 2016年第45期128卷

作者： Yoshihiro Shimoyama Tomoya Ishizuka Hiroaki Kotani Yoshihito Shiota Kazunari Yoshizawa Kaoru Mieda Takashi Ogura Toshihiro Okajima Shunsuke Nozawa Takahiko Kojima Department of Chemistry Faculty of Pure and Applied Sciences University of Tsukuba 1-1-1 Tennoudai Tsukuba Ibaraki 305-8571 Japan Institute for Materials Chemistry and Engineering Kyushu University Motooka Nishi-Ku Fukuoka 819-0395 Japan Picobiology Institute Graduate School of Life Science University of Hyogo RSC-UH Leading Program Center 1-1-1 Kouto Sayo-cho Sayo-gun Hyogo 679-5148 Japan Kyushu Synchrotron Light Research Center 8-7 Yayoigaoka Tosu Saga 841-0005 Japan Photon Factory Institute of Materials Structure Science High Energy Accelerator Research Organization (KEK) 1-1 Oho Tsukuba Ibaraki 305-0801 Japan

Proton‐coupled electron‐transfer oxidation of a Ru II −OH 2 complex, having an N‐heterocyclic carbene ligand, gives a Ru III −O . species, which has an electronically equivalent structure of the Ru IV =O species, in an acidic aqueous solution. The Ru III −O . complex was characterized by spectroscopic methods and DFT calculations. The oxidation state of the Ru center was shown to be close to +3; the Ru−O bond showed a lower‐energy Raman scattering at 732 cm −1 and the Ru−O bond length was estimated to be 1.77(1) Å. The Ru III −O . complex exhibits high reactivity in substrate oxidation under catalytic conditions; particularly, benzaldehyde and the derivatives are oxidized to the corresponding benzoic acid through C−H abstraction from the formyl group by the Ru III −O . complex bearing a strong radical character as the active species.

关键词： Katalyse N-heterocyclische Carbene Oxidationen Oxylradikale Ruthenium

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Surface modification of yttria-stabilized tetragonal zirconia with different glass based liners

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Dental materials 2016年 32卷 e95-e96页

作者： D. Silva-Herzog Rivera D. Masuoka-Ito L.O. Sanchez-Vargas J.L. Menchaca-Arredondo A. Aragón-Piña B.I. Cerda-Cristerna Institutional Doctoral Program of Engineering and Materials Science Universidad Autónoma De San Luis Potosí México Mexico Dentistry Department Universidad Autónoma De Aguascalientes México Mexico Faculty of Physics and Mathematics Universidad Autónoma De Nuevo León México Mexico Research Center and Post-Graduate Studies Universidad Autónoma De San Luis Potosí México Mexico Faculty of Dentistry Río Blanco Universidad Veracruzana-Región Córdoba-Orizaba México Mexico

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Bone Remodeling: Theranostic Bioabsorbable Bone Fixation Plate with Drug‐Layered Double Hydroxide Nanohybrids (Adv. Healthcare Mater. 21/2016)

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Advanced Healthcare materials 2016年第21期5卷

作者： Myung Hun Kim Woojune Hur Goeun Choi Hye Sook Min Tae Hyun Choi Young Bin Choy Jin‐Ho Choy Center for Intelligent Nano‐Bio Materials (CINBM) Department of Chemistry and Nano Science Ewha Womans University Seoul 03760 Republic of Korea Interdisciplinary Program in Bioengineering College of Engineering Seoul National University Seoul 08826 Republic of Korea Biomedical Research Institute Seoul National University Hospital Seoul 03080 Republic of Korea Department of Plastic and Reconstructive Surgery Institute of Human‐Environment Interface Biology College of Medicine Seoul National University Seoul 03080 Republic of Korea Department of Preventive Medicine Graduate School of Public Health Seoul National University Seoul 08826 Korea Institute of Medical and Biological Engineering Medical Research Center and Department of Biomedical Engineering College of Medicine Seoul National University Seoul 03080 Republic of Korea

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Plasmofluidics: Plasmofluidics: Merging Light and Fluids at the Micro-/Nanoscale (Small 35/2015)

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Small 2015年第35期11卷

作者： Mingsong Wang Chenglong Zhao Xiaoyu Miao Yanhui Zhao Joseph Rufo Yan Jun Liu Tony Jun Huang Yuebing Zheng Department of Mechanical Engineering Materials Science and Engineering Program Texas Materials Institute The University of Texas at Austin Austin Texas 78712 USA Department of Physics Electro-Optics Graduate Program University of Dayton Dayton Ohio 45469 USA Google Inc. 1600 Amphitheatre Pkwy Mountain View CA 94043 USA Department of Engineering Science and Mechanics Department of Biomedical Engineering Materials Research Institute Huck Institute of Life Sciences The Pennsylvania State University University Park Pennsylvania 16802 USA Institute of Materials Research and Engineering Agency for Science Technology and Research (A*STAR) 3 Research Link Singapore 117602 Singapore

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Characteristic of corrosion resistance under different heat treatment conditions of coated zinc coating steel with Cr-free solution

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International Conference on Advanced engineering Theory and Applications 2013, AETA 2013

作者： Nam, Ki-Woo Kim, Dae-Woong Kim, Nam-Suk Seong, Ki-Yong Department of Materials Science and Engineering Pukyong National University 365 Sinseonro Namgu Busan Korea Republic of UR Interdisciplinary Program of Mechanical Engineering Graduate School Pukyong National University Busan Korea Republic of Samjin Oil Pressure Co. Ltd. Busan Korea Republic of DM Co. Ltd. Kimhae Korea Republic of

ISBN: (纸本)9783642419676

This study performed a salt water spray test using zinc-coated steel sheet specimens, which are coated with S-700 solution and LR-0317. Test specimens were treated in the drying oven at 170∼210 °C for 5 minutes and at 190 °C for 3 to 9 minutes. Corrosion resistance of specimen was evaluated for 72 hours by salt water spray test. The coating layer was evaluated the adhesion by the cross-cut and the stability by the dipping of acid/alkali solution. In cross-cut test of coated specimens by S-700 and LR-0317, it was no peeling, and showed excellent adhesion. EGI and HDGI specimens appeared the lowest rust at the heat treatment of 190 °C for 5 minutes, and had the most good corrosion resistance. The acid resistance is not much affected by ambient temperature. The rusts of 60 °C dipping were more than the R.T dipping regardless of the type of material. The acid resistance of EGI by the S-700 solution improved without elemental difference by the oxide formed during the heat treatment. The Si oxide by LR-0317 solution had improved the corrosion resistance regardless of EGI and HDGI. This is judged that the component of Si oxide had control the corrosion. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Corrosion resistance

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Frontispiece: Quantum Crystallography: Current Developments and Future Perspectives

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Chemistry – A European Journal 2018年第43期24卷

作者： Alessandro Genoni Lukas Bučinský Nicolas Claiser Julia Contreras-García Birger Dittrich Paulina M. Dominiak Enrique Espinosa Carlo Gatti Paolo Giannozzi Jean-Michel Gillet Dylan Jayatilaka Piero Macchi Anders Ø. Madsen Lou Massa Chérif F. Matta Kenneth M. Merz Jr. Philip N. H. Nakashima Holger Ott Ulf Ryde Karlheinz Schwarz Marek Sierka Simon Grabowsky Université de Lorraine CNRS Laboratoire LPCT 1 Boulevard Arago F-57078 Metz France Institute of Physical Chemistry and Chemical Physics Slovak University of Technology FCHPT SUT Radlinského 9 SK-812 37 Bratislava Slovakia Université de Lorraine CNRS Laboratoire CRM2 Boulevard des Aiguillettes BP 70239 F-54506 Vandoeuvre-lès-Nancy France Sorbonne Universités UPMC Université Paris 06 CNRS Laboratoire de Chimie Théorique (LCT) 4 Place Jussieu F-75252 Paris Cedex 05 France Anorganische und Strukturchemie II Heinrich-Heine-Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany Biological and Chemical Research Centre Department of Chemistry University of Warsaw ul. Żwirki i Wigury 101 02-089 Warszawa Poland CNR-ISTM Istituto di Scienze e Tecnologie Molecolari via Golgi 19 Milano I-20133 Italy Istituto Lombardo Accademia di Scienze e Lettere via Brera 28 20121 Milano Italy Department of Mathematics Computer Science and Physics University of Udine Via delle Scienze 208 I-33100 Udine Italy Structure Properties and Modeling of Solids Laboratory CentraleSupelec Paris-Saclay University 3 rue Joliot-Curie 91191 Gif-sur-Yvette France School of Molecular Sciences University of Western Australia 35 Stirling Highway Perth WA 6009 Australia Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland Department of Pharmacy University of Copenhagen Universitetsparken 2 2100 Copenhagen Denmark Hunter College & the Ph.D. Program of the Graduate Center City University of New York New York USA Department of Chemistry and Physics Mount Saint Vincent University Halifax Nova Scotia B3M 2J6 Canada Department of Chemistry Dalhousie University Halifax Nova Scotia B3H 4J3 Canada Department of Chemistry Saint Mary's University Halifax Nova Scotia B3H 3C3 Canada Département de Chimie Université Laval Québec QC G1V 0A6 Canada Department of Chemistry and Department of Biochemistry and Molecular Biology Michigan Stat

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Local structure determination of substitutional elements in Ca 3Co4-xMxO9 (M = Fe, Cr, Ga) using X-ray absorption spectroscopy

Local structure determination of substitutional elements in ...

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作者： Pinitsoontorn, Supree Prasoetsopha, Natkrita Srepusharawoot, Pornjuk Bootchanont, Atipong Kidkhunthod, Pinit Kamwanna, Teerasak Amornkitbamrung, Vittaya Kurosaki, Ken Yamanaka, Shinsuke Department of Physics Faculty of Science Khon Kaen University Khon Kaen 40002 Thailand Integrated Nanotechnology Research Center Khon Kaen University Khon Kaen 40002 Thailand Materials Science and Nanotechnology Program Faculty of Science Khon Kaen University Khon Kaen 40002 Thailand School of Physics Institute of Science Suranaree University of Technology Nakhon Ratchasima Thailand Nakhon Ratchasima Thailand Graduate School of Engineering Osaka University Suita 565-0871 Japan

Ca3Co4O9 is one of the most promising thermoelectric oxide materials at high temperature. Its structure consists of two misfit layers: the CaO-CoO-CaO rocksalt-type (RS) layer and the CdI 2-type CoO2 layer. In this paper, we reported the synthesis of single phase Ca3Co4-xMxO 9 (where M = Fe, Cr, and Ga). Thermoelectric measurements showed the variation of thermoelectric properties depending on the charge state of the substitutional elements. We showed the direct evidence for the location of the substitutional elements in the system using an X-ray absorption spectroscopy technique. The extended X-ray absorption fine structure spectra were fitted with the models. Also, the X-ray absorption near edge structure spectra were compared with the simulated spectra from the first principle calculation. The data analysis show that for Fe and Cr substitution, the Fe and Cr atoms are more likely to be located in the RS layer rather than in the CoO2 as presumed previously. For the Ga case, Ga atoms accommodate both sites;still the majority stays in the RS layer. This is supported by the calculation of the total energy of the system, which showed that the total energy is lower when the substituted elements were located in the RS layer. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Cobalt compounds

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Influence of the Electrodeposited Co-Fe Alloys' Characteristics on their Magnetic Properties

Influence of the Electrodeposited Co-Fe Alloys' Characterist...

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The 2014 International Conference on Advanced materials,Structures and Mechanical engineering(ICAMSME 2014)

作者： Thanakrit Chotibhawaris Tachai Luangvaranunt Pongsakorn Jantaratana Yuttanant Boonyongmaneerat Nanoscience and Technology Interdisciplinary Program Graduate School Chulalongkorn University Metallurgical Engineering Department Faculty of Engineering Chulalongkorn University Department of Physics Faculty of Science Kasetsart University Metallurgy and Materials Science Research Institute (MMRI) Chulalongkorn University

Nanocrystalline CoFe films were fabricated by electrodeposition process for an investigation of the relationship between the alloys' characteristics and their magnetic properties. The study shows that coating thickness promotes softer magnetic properties of the films, and induces changes of film roughness, preferred orientation and domain pattern. The preferred orientation of the μm films（thin films） is（110） plane, whereas that of the μm films（thick films） are（110） and（200） planes. The magnetic domain of the thin films exhibit a stripe-liked pattern, whereas a bubble-liked pattern appears in the thick films. Iron content significantly affects the magnetic properties of the thick films. In this study, the 57.3wt.%Fe thick film has the highest saturation magnetization, and the 80.0wt.%Fe thick film shows the lowest coercivity.

关键词： Electrodeposition plating CoFe film magnetic properties

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