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Structural insights of mechanically induced aluminum-doped hydroxyapatite nanoparticles by Rietveld refinement

Chinese Journal of Chemical engineering 2017年第2期25卷 238-247页

作者： Abbas Fahami Bahman Nasiri-Tabrizi Gary W. Beall Wan Jefrey Basirun Materials Science Engineering and Commercialization Program Texas State University San Marcos 78666 TX USA Advanced Materials Research Center Materials Engineering Department Najafabad Branch Islamic Azad University Najafabad lsfahan lran Department of Chemistry and Biochemistry Texas State University San Marcos 78666 TX USA Physics Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia Department of Chemistry Faculty of Science University of Malaya150603 Kuala Lumpur Malaysia

Aluminum doped hydroxyapatite （HA：AI3 ＋） nanopowders were successfully prepared via a simple and efficient one-pot mechanochemical route. The effects of dopant loading on phase compositions and structural features were assessed by Rietveld analysis. The XRD-Rietveld refinement revealed the stabilization of HA in hexagonal structure for all the samples. The sharpness and intensity of the apatite-derived XRD peaks decreased as the dopant content increased to 10% due to the increase in lattice imperfections and mechanically induced amorphization. The incorpo- ration of A13 ＋ into the HA lattice decreased the unit cell parameters. From the FfiR measurements, the representing bands of apatite were identified in all cases. The mechanosynthesized nanopowders consisted of nanospheroids with an average size of 44 - 20 nm and therefore are promising for bone tissue regeneration.

关键词： SynthesisIon exchangeMechanochemicalRietveld refinement

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Application of nanocatalyst iron oxide (Fe2O3) to reduce exhaust emissions (CO and HC) 1

Application of nanocatalyst iron oxide (Fe2O3) to reduce exh...

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1st materials Research Society-Indonesia Conference and Congress 2017, MRS-INA C and C 2017

作者： Puspitasari, P. Yazirin, C. Bachtiar, L.A. Dika, J.W. Zaharis, S.M.S.N.S. Mechanical Engineering Department Engineering Faculty Malang State University Semarang street 5 East-Java-Malang Indonesia Center of Nano Research and Advanced Materials Malang State University Semarang street 5 East-Java-Malang Indonesia Master Program of Mechanical Engineering Engineering Faculty Malang State University Semarang street 5 East-Java-Malang Indonesia Bachelor Program Mechanical Engineering Department Malang State University Semarang street 5 East-Java-Malang Indonesia Industrial Chemical Technology Programme Faculty of Science and Technology Universiti Sains Islam Malaysia Bandar Baru Nilai Negeri Sembilan Nilai71800 Malaysia

Fe2O3 has been the interest of many studies due to its applications in various scientific and industrial fields including in environment, corrosion, soil science, and exhaust emissions. Fe2O3 is a chemical mixture that can be applied as a catalyst to reduce exhaust emissions because it is capable of binding CO and HC contained in motorcycle exhaust gases The growth of motor vehicles results in air pollution and an increase in exhaust emissions consisting of 70.50% CO and 18.34% HC. One effort to reduce exhaust emission levels is by applying a catalytic converter to the exhaust system. This research was an experimental research aiming to investigate the difference in emission level of CO and HC between a motorcycle with and without a catalytic converter. The types of fuel used were RON 88, RON 90, RON 92, and RON 98. The results showed that the application of Fe2O3 as a catalyst could reduce the level of CO significantly in RON 88, i.e. 91.43% CO, and the level of HC in RON 88 and RON 92, i.e. 53.27% and 91.07% HC respectively. © Published under licence by IOP Publishing Ltd.

关键词： Catalytic converters

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Correction: Unusual design strategy for a stable and soluble high-molecular-weight copper(I) arylacetylide polymer

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Chemical communications (Cambridge, England) 2021年第95期57卷 12856页

作者： Li Jiang Jiangtao Jia Yongchang Zhai Zhiqiang Zhao Yu Chen Fengchao Cui Yuyang Tian Zheng Bian Hongkun Tian Chuanqing Kang Lianxun Gao Mohamed Eddaoudi Guangshan Zhu Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of Chemistry Northeast Normal University 5268 Renmin Street Changchun 130024 China. bianz070@***. State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 China. Division of Physical Sciences and Engineering Advanced Membranes and Porous Materials Center Functional Materials Design Discovery and Development Research Group (FMD3) King Abdullah University of Science and Technology (KAUST) Thuwai 23955-6900 Kingdom of Saudi Arabia.

Correction for 'Unusual design strategy for a stable and soluble high-molecular-weight copper(I) arylacetylide polymer' by Li Jiang , , 2021, , 12004-12007, DOI: 10.1039/D1CC05080J.

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Performance of the prototype shaftless small scale horizontal wind turbine for electricity generating from industrial exhaust air system

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IOP Conference Series: Earth and Environmental science 2020年第1期463卷

作者： Wachira Puttichaem Yuttanant Boonyongmaneerat Pakpachong Vadhanasindhu Sompong Putivisutisak Technopreneurship and Innovation Management Program Graduate School Chulalongkorn University Bangkok 10330 Thailand Metallurgy and Materials Science Research Institute (MMRI) Chulalongkorn University Bangkok 10330 Thailand Faculty of Commerce and Accountancy Chulalongkorn Business School Chulalongkorn University Bangkok 10330 Thailand Advanced Computational Fluid Dynamics Research Unit Department of Mechanical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand

Man-made or unnatural wind from the industrial exhaust air system is an alternative wind resource for countries with natural low-speed or intermittent wind such as Thailand. It has strong and consistent wind speed when compared to the natural wind, with velocity about 5 to 10 m/s at a distance of 5 cm from the exhaust air outlet. However, some negative impacts to the exhaust air system performance was observed when a conventional wind turbine was employed. The objective of this research is to feasibility study the practicality of a prototype shaftless small scale horizontal axis wind turbine (SSHWT) to generate electricity from the exhaust air of the industrial exhaust air system. Aerodynamic, blade and generator designs were addressed in this study to maximize energy output and minimize negative impacts to the performance of the original exhaust air system. The performance of SSHWT was tested with a selected industrial fan that is widely used in industrial sections. The results showed that the SSHWT could generate electricity with less negative effect to exhaust air system performance. However, it still needs further improvements caused by the voltage output is too low. By the concept design, this innovative wind turbine is compact, thus needs only small space for installation. This SSHWT has high market potential for low wind speed countries to take advantage of unnatural wind resources which are better in terms of efficiency and economy for sustainable energy development.

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Effect of [email protected] nanoparticles and Ricinus communis biodiesel-diesel fuel blends on modified CRDI diesel engine characteristics

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Energy 2021年 215卷

作者： Manzoore Elahi M. Soudagar M.A. Mujtaba Mohammad Reza Safaei Asif Afzal Dhana Raju V Waqar Ahmed N.R. Banapurmath Nazia Hossain Shahid Bashir Irfan Anjum Badruddin Marjan Goodarzi Kiran Shahapurkar Syed Noeman Taqui Department of Mechanical Engineering Faculty of Engineering University of Malaya 50603 Kuala Lumpur Malaysia Institute of Research and Development Duy Tan University Da Nang 550000 Vietnam Department of Medical Research China Medical University Hospital China Medical University Taichung Taiwan NAAM Research Group Department of Mathematics Faculty of Science King Abdulaziz University Jeddah P.O. Box 80259 Saudi Arabia Department of Mechanical Engineering P. A. College of Engineering (Affiliated to Visvesvaraya Technological University Belagavi) Mangaluru 574153 India Department of Mechanical Engineering Lakireddy Bali Reddy College of Engineering Mylavaram A.P 521230 India Department of Mechanical Engineering B.V.B. College of Engineering and Technology KLE Technological University Vidyanagar Hubballi 580031 India School of Engineering RMIT University Melbourne VIC 3001 Australia Department of Physics Center of Ionics Faculty of Science University of Malaya Malaysia University of Malaya Kuala Lumpur 50603 Malaysia Research Center for Advanced Materials Science (RCAMS) King Khalid University P.O. Box 9004 Abha 61413 Asir Kingdom Saudi Arabia Mechanical Engineering Department College of Engineering King Khalid University PO Box 394 Abha 61421 Saudi Arabia Sustainable Management of Natural Resources and Environment Research Group Faculty of Environment and Labour Safety Ton Duc Thang University Ho Chi Minh City Vietnam Department of Mechanical Design and Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama 1888 Ethiopia Department of Chemistry University of Malaya Kuala Lumpur 50603 Malaysia

The current study aims to evaluate the performance and emission characteristics of a modified common rail direct injection (CRDI) diesel engine fueled by Ricinus communis biodiesel (RCME20), diesel (80%), and their blends with strontium-zinc oxide ( [email protected] ) nanoparticle additives. The [email protected] nanoparticles were synthesized using aqueous precipitation of zinc acetate dehydrate and strontium nitrate. Several characterization tests were performed to study the morphology and content of synthesized [email protected] nanoparticles. The [email protected] nanoparticles were steadily blended with RCME20-diesel fuel blend in mass fractions of 30, 60 and 90 ppm using a magnetic stirrer and ultrasonication process. For a long term stability of nanoparticles, Cetyl trimethylammonium bromide (CTAB) surfactant was added. The physicochemical properties of the fuel blends were measured using ASTM standards. The CRDI engine was operated at two compression ratios 17.5 and 19.5, 1000 bar injection pressure, 23.5°BTDC injection timing and constant speed. For enhanced swirl and turbulence, and improved spray quality lateral swirl combustion chamber and 6-hole fuel injector were used. The compression ratio of 19.5 and 60 ppm of [email protected] nano-additives showed overall enhancement in engine characteristics compared to RCME20 fuel. The engine characteristics such as BTE, HRR and cylinder pressure increased by 20.83%, 24.35% and 9.55%, and BSFC, ID, CD, smoke, CO, HC and CO 2 reduced by 20.07%, 20.64%, 14.5%, 27.90%, 47.63%, 26.81%, and 34.9%, while slight increase in NOx for all nanofuel blends was observed.

关键词： Ricinus communis biodiesel Strontium–Zinc oxide nanoparticles Combustion chamber geometry Fuel injector holes CRDI engine Performance and emission characteristics

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High-temperature microstructural evolution and room-temperature mechanical properties of friction-stir-processed 5083 aluminum alloy

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Keikinzoku/Journal of Japan Institute of Light Metals 2017年第8期67卷 361-366页

作者： Mizuguchi, Takashi Ito, Tsutomu Kimura, Kota Kurisaka, Tokiko Ohfuji, Hiroaki Kimura, Masaki Graduate School of Science and Engineering Ehime University 3 Bunkyo Matsuyama-shi Ehime790-8577 Japan Department of Mechanical Engineering National Institute of Technology Kagawa Collage Takamatsushi Kagawa Japan High Temperature Materials Design Group Energy Infrastructure Materials Field Research Center for Structural Materials National Institute for Materials Science Tsukubashi Ibaraki Japan Division of Advanced Materials Science Graduate School of Engineering Kagawa University Takamatsu-shi Kagawa Japan Undergraduate Stud. Department of Materials Science and Engineering Faculty of Engineering Ehime University Matsuyama-shi Ehime Japan Geodynamics Research Center Ehime University Matsuyama-shi Ehime Japan

This work investigated the microstructural evolution occurring during high-temperature tensile tests (743 K, strain rate 1×10-3 s-1) of a friction stir processed polycrystalline solid solution 5083 aluminum alloy, along with the effect of the microstructure change on the room-temperature mechanical properties. Grain refinement was effectively achieved in the stir zone, with the mean observed grain size less than 10 μm. The nominal stress-nominal strain curve indicated that the flow stress drastically increased until a maximum stress value at which point fracture occurred. The value of elongation to failure exceeded 300%;this high ductility can be referred to as superplastic-like elongation. The area fraction of cavity increased with increasing strain. Room-temperature tensile tests at a strain rate of 1×10-3 s-1 revealed that the strength and ductility decreased with an increasing area fraction of cavity, and that the extent to which the strength and ductility are affected depends on the cavity. © 2017 The Japan Institute of Light Metals.

关键词： Microstructural evolution

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Correction to: Investigation on the effect of cottonseed oil blended with different percentages of octanol and suspended MWCNT nanoparticles on diesel engine characteristics

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Journal of Thermal Analysis and Calorimetry 2020年第1期147卷 543-543页

作者： Soudagar, Manzoore Elahi M. Afzal, Asif Safaei, Mohammad Reza Manokar, A. Muthu EL‑Seesy, Ahmed I. Mujtaba, M. A. Samuel, Olusegun David Badruddin, Irfan Anjum Ahmed, Waqar Shahapurkar, Kiran Goodarzi, Marjan Department of Mechanical Engineering Faculty of Engineering University of Malaya Kuala Lumpur Malaysia Department of Mechanical Engineering P. A. College of Engineering (Affiliated to Visvesvaraya Technological University Belagavi) Mangaluru India Institute of Research and Development Duy Tan University Da Nang Vietnam Faculty of Electrical-Electronic Engineering Duy Tan University Da Nang Vietnam NAAM Research Group Department of Mathematics Faculty of Science King Abdulaziz University Jeddah Saudi Arabia Department of Mechanical Engineering B. S. Abdur Rahman Crescent Institute of Science and Technology Vandalur India Department of Mechanical Engineering Benha Faculty of Engineering Benha University Benha Egypt Department of Mechanical Engineering Federal University of Petroleum Resources Efurun Nigeria Research Center for Advanced Materials Science (RCAMS) King Khalid University Abha Kingdom of Saudi Arabia Mechanical Engineering Department College of Engineering King Khalid University Abha Kingdom of Saudi Arabia Department of Design and Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia Sustainable Management of Natural Resources and Environment Research Group Faculty of Environment and Labour Safety Ton Duc Thang University Ho Chi Minh City Vietnam

In the original publication of the article, the affiliations of the third, fourth and fifth authors were incorrectly published.

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Effects of carbon fiber on mechanical and electrical properties of fly ash geopolymer composite

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materials Today: Proceedings 2018年第6期5卷 14017-14025页

作者： Panjasil Payakaniti Supree Pinitsoonthorn Prasit Thongbai Vittaya Amornkitbamrung Prinya Chindaprasirt Materials Science and Nanotechnology Program Department of Physics Faculty of Science Khon Kaen University Khon Kaen 40002 Thailand Integrated Nanotechnology Research Center Department of Physics Faculty of Science Khon Kaen University Khon Kaen 40002 Thailand Nanotec-KKU Center of Excellence on Advanced Nanomaterials for Energy Production and Storage Khon Kaen University Khon Kaen 40002 Thailand Sustainable Infrastructure Research and Development Center Department of Civil Engineering Faculty of Engineering Khon Kaen University Khon Kaen 40002 Thailand

High calcium fly ash geopolymer composite was prepared by incorporating short carbon fiber in the geopolymer matrix. The carbon fiber (CF) content was varied from 0 to 1%, the liquid to ash ratio was controlled at 0.5. The workability, mechanical and electrical properties of the geopolymer composites were examined. The result showed that the incorporation of 0.5%CF and above resulted in the ductile failure of specimen. The increasing CF content also resulted in decreasing workability and mechanical strength. The electrical resistivity was also reduced and was more stable to the curing age and temperature. The cyclic voltammetry (CV) curve of 60°C curing provided less peaks than that of 25°C.

关键词： Geopolymer Alkaline activated binder Mechanical Properties Electrical properties

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Preparation of Nanocellulose-Alginate Nanocomposites for Chlorhexidine Digluconate Drug Carrier

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IOP Conference Series: materials science and engineering 2019年第1期547卷

作者： Angela Evelyna Tiara Khumaira Astifanni Imelda Ruth Lia Asri Bambang Sunendar Purwasasmita Faculty of Dentistry Maranatha Christian University Indonesia Materials Science and Engineering Bandung Institute of Technology Indonesia Advanced Materials Processing Group Engineering Physics Study Program Bandung Institute of Technology Indonesia Research Center for Nanosciences and Nanotechnology Bandung Institute of Technology Indonesia.

Root canal treatment failures generally caused by microorganisms that have ability to invade dentinal tubules. Chlorhexidine is widely known to effectively eradicate broad spectrum bacteria that infected dentinal tubules. The delivery of chlorhexidine to the infected site of root canal still becomes an issue. In order to increase the stability and to regulate the release of chlorhexidine, encapsulation of chlorhexidine digluconate was conducted by employing nanocellulose and alginate nanocomposites. Nanocellulose was prepared from palm kernel cake using acid hydrolysis method. Transmission electron microscopy images showed the formation of whisker and fiber nanocellulose with the average diameter of 20 nm. Resulting nanocellulose was combined with alginate in the presence of Ca2+ crosslinker. Scanning electron microscopy images displayed sphere and oval morphologies of microcapsules with diameter of 500 nm. The microcapsules were further loaded with chlorhexidine digluconate 2% (w/v). In vitro drug release properties were evaluated in PBS at pH 7.4 (normal tooth environment) and at pH 5.5 (infected tooth environment). The UV-VIS results showed that chlorhexidine digluconate has higher release rate at pH 5.5 than at pH 7.4, suggesting that the microcapsule is a good candidate for the delivery of chlorhexidine digluconate to the infected root canal tooth environment.

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International Scientific Collaboration Is Needed to Bridge science to Society: USERN2020 Consensus Statement

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SN comprehensive clinical medicine 2021年第8期3卷 1699-1703页

作者： Sara Momtazmanesh Amene Saghazadeh Juan Carlos Aldave Becerra Kiarash Aramesh Francisco J Barba Federico Bella Anna Blakney Massimo Capaccioli Rossella Castagna Umberto Crisanti Tigran Davtyan Tommaso Dorigo Julie Ealy Mehdi Farokhnia Giulia Grancini Manoj Gupta Amine Harbi Wojciech Krysztofiak Arutha Kulasinghe Chi-Ming Lam Alexander Leemans Brian Lighthill Vittorio Limongelli Paola Lopreiato Livio Luongo Christopher Ryan Maboloc Reza Malekzadeh Orlando Costa Gomes Milos Milosevic Jan Nouwen Delfín Ortega-Sánchez John Pawelek Surapati Pramanik Seeram Ramakrishna Ortwin Renn Serena Sanseviero Daniel Sauter Michael Schreiber Frank W Sellke Mohammad-Ali Shahbazi Natalya Shelkovaya Wayne H Slater Didier Snoeck Slawomir Sztajer Lucina Q Uddin Liz Veramendi-Espinoza Ricardo Vinuesa Walter C Willett Dongrui Wu Karolina Żyniewicz Nima Rezaei http://***. School of Medicine Tehran University of Medical Sciences Tehran Iran. Research Center for Immunodeficiencies Children's Medical Center Hospital Tehran University of Medical Sciences Tehran Iran. Division of Allergy and Immunology Hospital Nacional Edgardo Rebagliati Martins Lima Lima Peru. Department of Biology and Health Sciences College of Science and Health Professions Edinboro University of Pennsylvania Edinboro USA. Nutrition and Food Science Area Preventive Medicine and Public Health Food Science Toxicology and Forensic Medicine Department Faculty of Pharmacy Universitat de València Avda. Vicent Andrés Estellés S/n València 46100 Burjassot Spain. Department of Applied Science and Technology - DISAT Politecnico di Torino Corso Duca degli Abruzzi 24 10129 Torino Italy. Department of Infectious Diseases Imperial College London Norfolk Place London W2 1PG UK. Physics Department "Ettore Pancini" University of Naples Federico II Monte Sant'Angelo Campus via Cinthia 21 80121 Naples Italy. Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute for Science and Technology Barcelona 08028 Spain. Latvian Institute of Organic Synthesis (LIOS) Riga LV-1006 Latvia. Psychotherapist in Private Practice Canterbury Kent England. Analytical Laboratory Branch Scientific Centre of Drug and Medical Technology Expertise after Academician E. Gabrielyan CJSC Yerevan 0051 Armenia. INFN Sezione di Padova Padova Italy. Penn State Lehigh Valley 2809 Saucon Valley Road Center Valley PA 18034 USA. National Health Institutes of Health (NIH) Intramural Research Program (IRP) Bethesda USA. Department of Chemistry & INSTM University of Pavia Via Taramelli 14 Pavia I-27100 Italy. Department of Mechanical Engineering National University of Singapore Singapore Singapore. Souk Ahras University Souk Ahras Algeria. The Institute of Philosophy University of Szczecin Ul. Krakowska 71-79 Szczecin 71-004 Poland. Translational Research Institute Woolloongabba

Scientific collaboration has been a critical aspect of the development of all fields of science, particularly clinical medicine. It is well understood that myriads of benefits can be yielded by interdisciplinary and international collaboration. For instance, our rapidly growing knowledge on COVID-19 and vaccine development could not be attained without expanded collaborative activities. However, achieving fruitful results requires mastering specific tactics in collaborative efforts. These activities can enhance our knowledge, which ultimately benefits society. In addition to tackling the issue of the invisible border between different countries, institutes, and disciplines, the border between the scientific community and society needs to be addressed as well. International and transdisciplinary approaches can potentially be the best solution for bridging science and society. The Universal Scientific Education and Research Network (USERN) is a non-governmental, non-profit organization and network to promote professional, scientific research and education worldwide. The fifth annual congress of USERN was held in Tehran, Iran, in a hybrid manner on November 7-10, 2020, with key aims of bridging science to society and facilitating borderless science. Among speakers of the congress, a group of top scientists unanimously agreed on The USERN 2020 consensus, which is drafted with the goal of connecting society with scientific scholars and facilitating international and interdisciplinary scientific activities in all fields, including clinical medicine.

关键词： Collaboration International Policy Research science Society

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