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Moldable setting time evaluation between sodium alginate and bovine gelatine of glutinous rice mixture as dental putty materials

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IOP Conference Series: materials science and engineering 2017年第1期172卷

作者： V Takarini Z Hasratiningsih E Karlina R Febrida L A T W Asri BS Purwasasmita Department of Dental Materials Science and Technology Faculty of Dentistry University of Padjadjaran Sekeloa Selatan 1 Bandung 40132 Indonesia Advanced Material Processing Laboratory Engineering Physics Study Program Institute of Technology Bandung Ganesha 10 Bandung 40132 Indonesia

Putty elastomeric material is a viscous, moldable material that can be used as a dental impression to record and duplicate the tooth structure. Commercially available putty materials are hardly found in the Indonesian market. The aim of this work is to develop an alternative putty dental material from glutinous rice with two different gelling agents; sodium alginate and bovine gelatine. A commercially putty material was used as a control. The length of time required for the putty materials to set (setting time) was evaluated with compression set test. The result showed that sodium alginate and bovine gelatine gelling agents resulted in moldable putty materials that comparable to the commercial product. Glutinous rice mixed with sodium alginate gelling agent demonstrated longer setting time (more than 1 hours) compared to bovine gelatine (6 minutes). These may occur due to heat treatment applied to the bovine gelatine, while sodium alginate mixture has a chemical reaction since CaCl2 crosslink agent had been added to the mixture. Glutinous rice with bovine gelatine mixture is a promising candidate to be used as a dental putty material.

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Ionic Functionalization of Multivariate Covalent Organic Frameworks to Achieve an Exceptionally High Iodine-Capture Capacity

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Angewandte Chemie 2021年第41期133卷

作者： Dr. Yaqiang Xie Dr. Tingting Pan Dr. Qiong Lei Dr. Cailing Chen Dr. Xinglong Dong Dr. Youyou Yuan Dr. Jie Shen Dr. Yichen Cai Dr. Chunhui Zhou Prof. Dr. Ingo Pinnau Prof. Dr. Yu Han Advanced Membranes and Porous Materials (AMPM) Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Imaging and Characterization Core Lab KAUST Thuwal Saudi Arabia Material Science and Engineering Program Physical Sciences and Engineering Division KAUST Thuwal Saudi Arabia KAUST Catalysis Center Physical Sciences and Engineering Division KAUST Thuwal Saudi Arabia

Adsorption-based iodine (I 2 ) capture has great potential for the treatment of radioactive nuclear waste. In this study, we apply a “multivariate” synthetic strategy to construct ionic covalent organic frameworks (iCOFs) with a large surface area, high pore volume, and abundant binding sites for I 2 capture. The optimized material iCOF-AB-50 exhibits a static I 2 uptake capacity of 10.21 g g −1 at 75 °C and a dynamic uptake capacity of 2.79 g g −1 at ≈400 ppm I 2 and 25 °C, far exceeding the performances of previously reported adsorbents under similar conditions. iCOF-AB-50 also exhibits fast adsorption kinetics, good moisture tolerance, and full reusability. The promoting effect of ionic groups on I 2 adsorption has been elucidated by experimentally identifying the iodine species adsorbed at different sites and calculating their binding energies. This work demonstrates the essential role of balancing the textural properties and binding sites of the adsorbent in achieving a high I 2 capture performance.

关键词： adsorption Coulomb interaction covalent organic frameworks iodine capture

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Synthesis, Characterization, and performance test of modified Zeolite-Si/Al nanocomposite from pumice and waste cans using slow pyrolysis process for removal pollutant parameters from hard water

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Environmental Nanotechnology, Monitoring and Management 2023年 20卷

作者： Gusti Wibowo, Yudha Sudibyo Rianjanu, Aditya Taher, Tarmizi Susanti, Noni Karo Karo, Pulung Suprihatin Iman Supriyatna, Yayat Prasetyo, Erik Bahfie, Fathan Amin, Muhammad Syarifuddin, Hutwan Safitri, Hana Khairurrijal, Khairurrijal Department of Mining Engineering Institut Teknologi Sumatera Lampung-35365 Indonesia Research Center for Mining Technology National Research and Innovation Agency Lampung Indonesia Department of Material Engineering Institut Teknologi Sumatera Lampung-35365 Indonesia Department of Environmental Engineering Institut Teknologi Sumatera Lampung-35365 Indonesia Physics Department Universitas Lampung Lampung Indonesia Department of Environmental Science Postgraduate Program Universitas Jambi Jambi 36122 Indonesia Laboratory of Mine Environmental Department of Mining Engineering Institut Teknologi Sumatera Lampung-35365 Indonesia Department of Physics Institut Teknologi Sumatera Lampung-36365 Indonesia Department of Physics Institut Teknologi Bandung Bandung 40132 Indonesia Center for Green and Sustainable Materials Institut Teknologi Sumatera Indonesia

Hard water is one of crucial problems in the world due to its pollutant parameters. Adsorption is a promising method for treating hard water because of its benefits such as low-cost, easy to use, acceptable, and easy to maintenance. In this study, we utilized zeolite functionalized with silicon/aluminum (Ze-Si/Al) as adsorbent materials for hard water treatment. Ten different ratios of Si/Al were added into zeolite by modifying the solid waste source concentration (pumice and cans). The optimum sample was then further tested with different parameters including contact time, dye concentration, and isotherm models. The zeolite-Si/Al adsorbent was characterized by Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), and X-Ray Fluorescence (XRF). Results of this study have showed that the best functionalized zeolite was that with Si/Al ratio 0.67, which has higher sorption ability. In contact time test, the equilibrium was reached after 300 min. This study also informed that the concentration of dyes will give impact on removal of pollutant parameters. Isotherm model of Ze-Si/Al fitted with Langmuir method. This study also discussed the potential development and future research direction. Thus, this study is a crucial report to develop the information about waste utilization as source of Si/Al to increasing quality of zeolite. © 2023 Elsevier B.V.

关键词： Adsorption Hard water Wastewater Wastewater treatment zeolite-Si/Al

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Atomic-Scale Simulation of Grain Boundary Kinetics during Recrystallization

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MRS Online Proceedings Library 2020年第1期819卷 N6.7.1-N6.7.9页

作者： Z. Trautt M. Upmanyu Group for Simulation and Theory of Atomic-scale Material Phenomena (stAMP) USA Department of Physics Colorado School of Mines Golden USA Engineering Division Colorado School of Mines Golden USA Materials Science Program Colorado School of Mines Golden USA

We present two-dimensional molecular dynamics (MD) simulations of symmetric tilt grain boundary kinetics, driven by stored energy of deformation. The latter is introduced by prescribing a well-defined gradient in dislocation density across a flat grain boundary. Bi-crystals simulations reveal that the boundary motion, albeit jerky, increases linearly with simulation time. We also employ a control simulation to extract the driving force for motion, which then yields a unique boundary mobility. Preliminary comparisons with curvature driven boundary migration for misorientations 30° and 22.78° suggest that misorientation dependence of boundary migration is significantly less anisotropic, in turn implying that the mechanism of motion itself is different.

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Evolution of Incommensurate Charge Density Waves Quantified with In Situ TEM

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Microscopy and Microanalysis 2024年第SUPPLEMENT_1期30卷

作者： Shen, Jeremy M Sung, Suk Hyun Agarwal, Nishkarsh Stangel, Alex Hovden, Robert Department of Electrical and Computer Engineering University of Michigan Ann Arbor MI USA Rowland Institute at Harvard Harvard University Cambridge MA USA Department of Material Science and Engineering University of Michigan Ann Arbor MI USA Applied Physics Program University of Michigan Ann Arbor MI USA

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A Superior Low‐Cost Cathode for a Na‐Ion Battery†

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Angewandte Chemie 2013年第7期125卷

作者： Long Wang Yuhao Lu Jue Liu Maowen Xu Jinguang Cheng Dawei Zhang John B. Goodenough Material Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 (USA) Chemistry Department State University of New York at Stony Brook Stony Brook NY 11794 (USA) School of Chemical Engineering Hefei University of Technology Hefei 230009 (P.R. China)

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Growth mechanism of Co:TiO2 thin film deposited by metal organic chemical vapor deposition technique

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IOP Conference Series: materials science and engineering 2016年第1期128卷

作者： A Saripudin P Arifin Study Program of Electrical Engineering Dept. of Electrical Engineering Education Faculty of Technology and Vocational Universitas Pendidikan Indonesia Jl. Dr. Setiabudi 207 Bandung 40154 West Java Indonesia Physics of Electronics Material Lab. Study Program of Physics Faculty of Mathematics and Natural Science Institut Teknologi Bandung Jl. Ganeca 10 Bandung 40132 West Java Indonesia

In this research, we investigated the growth mechanism of cobalt-doped titanium dioxide (Co:TiO2) films. Thi Co:TiO2 thin films were grown on the n-type silicon substrate. The films were grown by metal organic chemical vapor deposition method. The growth temperature was varied of 325°C – 450°C. The films were characterized by SEM. Using Arheniu's equation, it is known that the activation energy value of film growth is positive in the range of temperature of 325°C – 400°C and negative in the range of temperature of 400°C – 450°C. These results show that the decomposition rate in the range of temperature of 325°C – 400°C is due to diffusion phase of precursor gas. On the other hand, the decomposition rate decreased in the range of temperature of 400°C – 450°C because the precursor gas decreased, and the surface chemical reaction was high.

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Selective enrichment and sensitive detection of candidate disease biomarker using a novel surfactant-coated magnetic nanoparticles

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IOP Conference Series: materials science and engineering 2014年第1期64卷

作者： R Y Capangpangan M A C dela Rosa C H Chang W C Wang J Peng S J Shih M H Chiang D L Tzou C C Lin Y J Chen Department of Chemistry National Tsing Hua University Hsinchu Taiwan Molecular Science and Technology Taiwan International Graduate Program Taiwan contributed equally to this work Department of Chemistry National Taiwan University Taipei Taiwan Nanoscience and Technology Program Taiwan International Graduate Program Taiwan En Hou Polymer Chemical Ind. Co. Ltd. Taiwan Department of Material Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan Institute of Chemistry Academia Sinica Taipei Taiwan To whom any correspondence should be addressed

In this study, novel surfactant-coated magnetic nanoparticles were synthesized and evaluated for enrichment performance towards the sensitive detection of disease biomarkers. Surfactants with phosphate ester groups (RD35A and RD66) were used as a coating to reduce aggregation and to enhance the nanoparticle dispersion. Importantly, sensitive enrichment of the target proteins using the antibody-functionalized magnetic nanoparticles (Ab@MNP) was obtained, with a five-fold increase in recovery compared to uncoated magnetic nanoparticles. Similarly, phosphopeptide enrichment using the NTA@MNP in standard samples showed that the nanoparticles could selectively enrich phosphorylated peptides.

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Chemical evolution of some selected complex organic molecules in low-mass star-forming regions

arXiv

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arXiv 2023年

作者： Bhat, Bratati Kar, Rumela Mondal, Suman Kumar Ghosh, Rana Gorai, Prasanta Shimonishi, Takashi Tanaka, Kei E.I. Furuya, Kenji Das, Ankan Institute of Astronomy Space and Earth Science 1 Bidhan Sishu Sarani Kolkata700054 India Department of Metallurgical Engineering and Material Sciences IIT Bombay Powai Maharashtra Mumbai400076 India S. N. Bose National Center for Basic Sciences JD-Block Salt Lake Kolkata700098 India Indian Centre for Space Physics 43 Chalantika Garia Station Road Kolkata700084 India Department of Space Earth & Environment Chalmers University of Technology GothenburgSE-412 96 Sweden Center for Transdisciplinary Research Niigata University Niigata Nishi-ku950-2181 Japan Environmental Science Program Department of Science Faculty of Science Niigata University Niigata Nishi-ku950-2181 Japan Department of Earth and Planetary Sciences Tokyo Institute of Technology Meguro Tokyo152-8551 Japan Center for Computational Sciences University of Tsukuba Tsukuba305-8577 Japan National Astronomical Observatory of Japan Tokyo181-8588 Japan

The destiny of complex organic molecules (COMs) in star-forming regions is interlinked with various evolutionary phases. Therefore, identifying these species in diversified environments of identical star-forming regions would help to comprehend their physical and chemical heritage. We identified multiple COMs utilizing the Large program ‘Astrochemical Surveys At IRAM’ (ASAI) data, dedicated to chemical surveys in Sun-like star-forming regions with the IRAM 30 m telescope. It was an unbiased survey in the millimeter regime, covering the prestellar core, protostar, outflow region, and protoplanetary disk phase. Here, we have reported some transitions of seven COMs, namely, methanol (CH3OH), acetaldehyde (CH3CHO), methyl formate (CH3OCHO), ethanol (C2H5OH), propynal (HCCCHO), dimethyl ether (CH3OCH3), and methyl cyanide (CH3CN) in some sources L1544, B1-b, IRAS4A, and SVS13A. We found a trend among these species from the derived abundances using the rotational diagram method and MCMC fit. We have found that the abundances of all of the COMs, except for HCCCHO, increase from the L1544 (prestellar core) and peaks at IRAS16293-2422 (class 0 phase). It is noticed that the abundance of these molecules correlate with the luminosity of the sources. The obtained trend is also visible from the previous interferometric observations and considering the beam dilution effect. Copyright © 2023, The Authors. All rights reserved.

关键词： Molecules

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2D Nanosilicate for additive manufacturing: Rheological modifier, sacrificial ink and support bath

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Bioprinting 2022年 25卷

作者： Rajput, Satyam Deo, Kaivalya A. Mathur, Tanmay Lokhande, Giriraj Singh, Kanwar Abhay Sun, Yuxiang Alge, Daniel L. Jain, Abhishek Sarkar, Tapasree Roy Gaharwar, Akhilesh K. Department of Biomedical Engineering College of Engineering Texas A&M University College Station 77843 TX United States Nutrition College of Agriculture and Life Sciences Texas A&M University College Station 77843 TX United States Department of Material Science and Engineering College of Engineering Texas A&M University College Station 77843 TX United States Department of Biology Texas A&M University College Station 77843 TX United States Interdisiplinary Program in Genetics Texas A&M University College Station 77843 TX United States Center for Remote Health Technologies and Systems Texas A&M University College Station 77843 TX United States Department of Medical Physiology College of Medicine Texas A&M Health Science Center Bryan 77807 TX United States Department of Cardiovascular Sciences Houston Methodist Institute for Academic Medicine Houston Methodist Research Institute Houston 77030 TX United States

Extrusion-based 3D printing/bioprinting is a promising approach to generate patient-specific tissue engineered grafts. However, a major challenge in extrusion-based 3D printing/bioprinting is that most currently used materials lack the versatility to be used in a wide range of applications. In this study, we introduce colloidal solutions of two-dimensional (2D) nanosilicates as a platform technology to print complex structures via three different approaches. In the first approach, we designed a shear-thinning ink composed of nanosilicates, which can be further reinforced by adding different types of water-soluble polymers. In the second approach, we demonstrated the use of nanosilicates as a sacrificial ink to design microfluidic devices for in vitro disease modelling. In the third approach, we utilized a colloidal nanosilicate gel as a support bath for 3D printing by nullifying the surface tension and gravitational forces. Due to their exceptional versatility, nanosilicate-based biomaterials could be widely adopted in the fields of additive manufacturing, tissue engineering, drug delivery, and medical devices. © 2022 Elsevier B.V.

关键词： 3D printing / bioprinting Additive manufacturing Biomaterials ink Nanoparticles Regenerative medicine

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