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1st Sriwijaya International Conference on Basic and Applied sciences, SICBAS 2018

作者： Huda, A. Ichwani, R. Handoko, C.T. Bustan, M.D. Yudono, B. Gulo, F. Program Studi Ilmu Lingkungan Program Pascasarjana Universitas Sriwijaya Jalan Padang Selasa No. 524 Sumatera Selatan Palembang30121 Indonesia Department of Material Science and Engineering Worcester Polytechnic Institute WorcesterMA01609 United States Program Studi Teknik Kimia Fakultas Teknik Universitas Sriwijaya Jalan Palembang Prabumulih Km. 32 Indralaya Ogan Ilir Sumatera Selatan30862 Indonesia

Microsphere Sn3O4 flower-like structure has been successfully synthesized using a novel microwave-assisted hydrothermal method and comprehensively characterized by X-ray diffraction (XRD), field emission gun scanning electron microscope (FEG-SEM) and UV Vis spectrophotometer equipped with diffuse reflectance spectroscopy (UV-Vis DRS). In order to examine its photocatalytic performance, two synthetic azo-based dyes, acid yellow 17 (AY17) and direct blue 71 (DB71), have been used as organic pollutant models degraded under visible-light illumination. The results show that the negative charges of Sn3O4 produce higher efficiency photocatalytic activity on DB71 degradation compared to that on AY17 degradation. Further investigation has confirmed that the adsorption capacities played the main role in determining photocatalytic performance and differentiated the quantum yield of dye degradation. Moreover, the different adsorption capacities are generated by the formation of electrostatic interaction and repulsion between surface charge of Sn3O4 and dyes functional groups. © Published under licence by IOP Publishing Ltd.

关键词： Scanning electron microscopy

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Genomic insights of leafminer resistance in spinach through GWAS approach and genomic prediction

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Horticultural Plant Journal 2024年

作者： Ibtisam Alatawi Haizheng Xiong Beiquan Mou Kenani Chiwina Waltram Ravelombola Qun Luo Yiting Xiao Yang Tian Ainong Shi Department of Horticulture University of Arkansas Fayetteville AR 72701 USA Sam Farr U.S. Crop Improvement and Protection Research Center U.S. Dept. of Agriculture Agricultural Research Service (USDA-ARS) Salinas CA 93905 USA Texas A&M AgriLife Research 11708 Highway 70 South Vernon TX 76384 USA Biological Engineering University of Arkansas Fayetteville AR 72701 USA Program of Material Science and Engineering University of Arkansas Fayetteville AR 72701USA

The Leafminers, representing a diverse group of insects from various genera within the Agromyzidae family, pose a significant threat to spinach ( Spinacia oleracea L.) production. This study aimed to identify single nucleotide polymorphism (SNP) markers associated with leafminer resistance through a genome-wide association study (GWAS) and to evaluate the prediction accuracy (PA) for selecting resistant spinach using genomic prediction (GP). Using a dataset of 84 301 SNPs obtained from whole-genome resequencing, seven GWAS models, including BLINK, FarmCPU, MLM, and MLMM in GAPIT 3, as well as MLM, GLM, and SMR in TASSEL 5, were employed to perform GWAS on a panel of 286 USDA spinach germplasm accessions. Three SNP markers, namely 1_115279256_C_T, 3_157082529_C_T, and 4_168510908_T_G on chromosomes 1, 3, and 4, respectively, were identified as associated with leafminer resistance. In the 30 kb flanking regions of these markers, four candidate genes ( SOV1g031330 , SOV1g031340 , SOV4g047270 , and SOV4g047280 ), encoding LOB domain-containing protein, KH domain-containing protein, were discovered. Nodulin-like domain-containing protein, and SAM domain-containing protein, were discovered. The PA for leafminer resistance selection was estimated using ten different SNP sets, including two GWAS-derived marker sets (three and 51 SNPs) and eight random marker sets (ranging from 51 to 10 K SNPs) analyzed by seven GP models. The findings emphasized the superior performance of GWAS-derived SNP sets, reaching a PA of up to 0.79 using the cBLUP model. Notably, this research marks the pioneering application of GP in the context of insect resistance, providing a significant advancement in the understanding and management of leafminer resistance in spinach cultivation.

关键词： spinach germplasm genome-wide association study pest resistance genomic prediction

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Emergent magnetic ordering and topological frustration in quasicrystal artificial spin ices

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Physical Review B 2019年第9期99卷 094424-094424页

作者： F. Barrows V. Brajuskovic A. K. Petford-Long C. Phatak Material Science Division Argonne National Laboratory Argonne Illinois 60439 USA Applied Physics Program Northwestern University Evanston Illinois 60208 USA Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA

Artificial spin ices (ASIs) are nanoscale geometrically engineered arrays of magnetic bars or islands that display magnetic frustration and provide a fertile system for modeling and testing many complex statistical mechanics theories and emergent phenomena. Aperiodic ASIs display spatially varying magnetic frustration as a result of the aperiodicity. We have explored the magnetization reversal of quasicrystalline ASIs (QC-ASIs) patterned on P2 and P3 Penrose tilings, using a statistical graph-theory approach that enables quantitative comparison between the two tilings. Our approach offers insight into the QC-ASIs. We show that the P2 tiling leads to enhanced topological frustration compared to the P3 tiling, and we elucidate the emergence of local antiferromagnetic ordering as well as disordered states in these ferromagnetic aperiodic lattices. Our method enables quantitative exploration of frustration behavior on any periodic or aperiodic lattice, thereby opening pathways to study collective behavior in various topologically frustrated systems.

关键词： Magnetic interactions Magnetic order Magnetism

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Magnetic Control of Soft Chiral Phonons in PbTe

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Physical Review Letters 2022年第7期128卷 075901-075901页

作者： Andrey Baydin Felix G. G. Hernandez Martin Rodriguez-Vega Anderson K. Okazaki Fuyang Tay G. Timothy Noe, II Ikufumi Katayama Jun Takeda Hiroyuki Nojiri Paulo H. O. Rappl Eduardo Abramof Gregory A. Fiete Junichiro Kono Department of Electrical and Computer Engineering Rice University Houston Texas 77005 USA Smalley-Curl Institute Rice University Houston Texas 77005 USA Instituto de Física Universidade de São Paulo São Paulo São Paulo 05508-090 Brazil Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Laboratório Associado de Sensores e Materiais Instituto Nacional de Pesquisas Espaciais São José dos Campos São Paulo 12201-970 Brazil Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston Texas 77005 USA Department of Physics Graduate School of Engineering Science Yokohama National University Yokohama 240-8501 Japan Institute for Materials Research Tohoku University Sendai 980-8577 Japan Department of Physics Northeastern University Boston Massachusetts 02115 USA Department of Physics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Physics and Astronomy Rice University Houston Texas 77005 USA Department of Material Science and NanoEngineering Rice University Houston Texas 77005 USA

PbTe crystals have a soft transverse optical phonon mode in the terahertz frequency range, which is known to efficiently decay into heat-carrying acoustic phonons, resulting in anomalously low thermal conductivity. Here, we studied this phonon via polarization-dependent terahertz spectroscopy. We observed softening of this mode with decreasing temperature, indicative of incipient ferroelectricity, which we explain through a model including strong anharmonicity with a quartic displacement term. In magnetic fields up to 25 T, the phonon mode splits into two modes with opposite handedness, exhibiting circular dichroism. Their frequencies display Zeeman splitting together with an overall diamagnetic shift with increasing magnetic field. Using a group-theoretical approach, we demonstrate that these observations are the result of magnetic field-induced morphic changes in the crystal symmetries through the Lorentz force exerted on the lattice ions. Thus, our Letter reveals a novel process of controlling phonon properties in a soft ionic lattice by a strong magnetic field.

关键词： Chirality Diamagnetism Magneto-dielectric effect Optical phonons Thermal conductivity Zeeman effect Terahertz time-domain spectroscopy

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Publisher's Note: “Sub-100 nm high spatial frequency periodic structures driven by femtosecond laser induced desorption in GaAs” [Appl. Phys Lett. 118, 242106 (2021)]

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Applied Physics Letters 2021年第1期119卷

作者： Alex Sarracino Abdul R. Ansari Ben Torralva Steven Yalisove 1Applied Physics Program University of Michigan Ann Arbor Michigan 48104 USA 2Material Science and Engineering University of Michigan Ann Arbor Michigan 48109 USA

This article was originally published online on 17 June 2021 with errors.

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Quantitative Study on the Effect of Thermal Gradients on the Microstructure of Additively Manufactured Ti-6Al-4V Builds

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Microscopy and Microanalysis 2019年第S2期25卷 2598-2599页

作者： Meiyue Shao Chris Blackwell Sriram Vijayan Sabina Kumar Sudarsanam S. Babu Joerg R. Jinschek Department of Material Science and Engineering The Ohio State University Columbus OH USA. Department of Material Science and Engineering University of Tennessee Knoxville TN USA. Department of Mechanical Aerospace and Biomedical Engineering U Tennessee Knoxville TN USA. Advanced Manufacturing Program Energy and Environmental Sciences Division ORNL Knoxville TN USA.

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Bioenergy knowledge, perception and attitude among students at Jambi state senior high school

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Journal of Physics: Conference Series 2021年第1期1816卷

作者： Nazarudin M P H Hasibuan B Haryadi Nurhayati Ulyarti Hadiyanto Chemical Engineering FST University of Jambi Jambi Indonesia Energy and Nano Material Centre LPPM Universitas Jambi Jambi Indonesia Center of Excellent on Bio-Geo Material and Energy Universitas Jambi Jambi Indonesia Master of Enviromental Study Program University of Jambi Jambi Indonesia Master of Science Education Program University of Jambi Jambi Indonesia

Bioenergy is one of the renewable energies which is predicted to be a main energy in the next few years. It can play the important role to change the current fossil fuel-based energy into a green energy which has a low carbon footprint. A research about how to develop a bioenergy have been done by a lot of reseacher. However, especially in Indonesia, there is just few research to study about bioenergy from societal aspects poin of view such as the understanding and awarness of bioenergy among citizens. In this research, we have investigated senior high school students' knowledge, perceptions, and attitudes interconected to bioenergy with online survery. The survey instrument used in the study was adopted from P. Halder's study. The data was collected from students at senior high school th (SMAN 10) Jambi City. The results showed that the students awareness of bioenergy perceived from school, home, and social media have significant effects on their knowledge, perceptions and attitudes related to bioenergy. Among 211 students as respondent (N), we found 70.62% believe that they understand well the concept about bioenergy, 5.21% believe that they understand it very well, and the rest believe that they do not understand it. This understanding reflects to their willingness to use a bioenergy in their daily life, in which 71.70% respondents agree to use bioenergy, 25.47% respondents can not decide, and only 2.83% do not want to use it. To find the relationship among the variables, a multiple regression was conducted. A statistical analysis showed that the model for knowledge as a function of attitudes and perception does not fit the data therefore this model is rejected. However, both model for attitudes as function of perception and knowledge, and also perception as function of attitudes and knowldeges fit the data hence the models are accepted. In other words, attitudes of students who will use/not use bioenergy, is significantly affected by their perception about bioen

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Tribological properties of hydroxyapatite-coated nanorods on Ti-6Al-4V surfaces

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Scientific Reports 2025年第1期15卷 1-24页

作者： Osafo, Sarah Akua Asumadu, Tabiri Klenam, Desmond Etinosa, Precious Obayemi, John David Agyei-Tuffour, Benjamin Yaya, Abu Dodoo-Arhin, David Eluu, Stanley Chijioke Soboyejo, Wole Department of Materials Science and Engineering School of Engineering Sciences College of Basic and Applied Sciences University of Ghana Accra Legon Ghana Department of Biomaterial Sciences Dental School University of Ghana Korle Bu Campus Accra Ghana Department of Mechanical Engineering Program in Materials Science and Engineering Worcester Polytechnic Institute 100 Institute Road Worcester 01609 MA United States Department of Materials Engineering Sunyani Technical University Sunyani Ghana Global Center of Advanced Materials and Manufacturing Department of Mechanical Engineering College of Engineering State University of New York (SUNY) Polytechnic Institute 100 Seymour Street Utica 13502 NY United States Next Frontiers in Advanced Material Laboratory School of Chemical and Metallurgical Engineering University of the Witwatersrand 1 Jan Smuts Avenue Johannesburg 2050 South Africa Department of Biomedical Engineering Worcester Polytechnic Institute Gateway Park Life Sciences and Bioengineering Centre 60 Prescott Street Worcester 01609 MA United States Department of Biotechnology Ebonyi State University Abakaliki Nigeria Department of Pharmaceutical Microbiology and Biotechnology Faculty of Pharmaceutical Sciences Nnamdi Azikiwe University Anambra State Awka Nigeria

This paper presents the tribological properties and bioactivity of nanostructured hydroxyapatite (HA) from biowaste sources and coated onto Ti-6Al-4V substrates using a novel pack cementation method. The process introduced HA pillars/nanorods on the surfaces of Ti-6Al-4V to enhance their osseointegration for dental implants. The mechanical and tribological properties were studied with nanoindentation, and pin-on-disk techniques, following the microstructural characterization of the coatings with atomic force microscopy, X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and energy dispersive x-ray spectroscopy. The study also examines the surface bioactivity and elucidates the underlying friction and wear mechanisms of the HA-coated and annealed Ti-6Al-4V surface. The study results show a bone bonding capacity of the biowaste-derived HA-coated substrate with improved hardness and tribological properties. The implications of the study are discussed for the development of nano-structured HA-coated Ti-6Al-4V for dental implants with improved osseointegration for dental and biomedical applications. © The Author(s) 2025.

关键词： Bioactivity Dental implants Osseointegration Surface modification Titanium alloys Wear resistance

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Quantitative contributions of solution atoms, precipitates and deformation to microstructures and properties of Al-Sc-Zr alloys

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Transactions of Nonferrous Metals Society of China 2019年第5期29卷 907-918页

作者： Ren-guo GUAN Hong-mei JIN Wensen JIANG Xiang WANG Yu-xiang WANG Zheng LI Jian ZHANG Huinan LIU Center of Advanced Lubrication and Seal Materials State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’an 710072China School of Material Science and Engineering Northeastern UniversityShenyang 110819China Materials Science and Engineering Program University of California at Riverside900 University AvenueRiversideCalifornia 92521USA Department of Bioengineering University of California at Riverside900 University AvenueRiversideCalifornia 92521USA

In order to investigate the effects of solid solution atoms, precipitated particles and cold deformation on the microstructures and properties of Al-Sc-Zr alloys, the Al-Sc-Zr alloys prepared by continuous rheo-extrusion were treated by thermomechanical treatment, analyzed for conductivity and mechanical properties by tensile and microhardness testing, and characterized using optical microscope, TEM and STEM. A mathematical model was established to quantitatively characterize the contribution of solid solution atoms, precipitates and cold deformation to the conductivity of the alloy. The results show that the strength of Al alloy can be significantly improved by solid solution, aging and cold deformation, and the quantitative impacts of solution atoms, precipitates and cold deformation on the conductivity of Al alloy are 10.5%(IACS), 2.3%(IACS) and 0.5%(IACS), respectively. Aging and cold deformation treatments are the keys to obtain high-strength and high-conductivity aluminum alloy wires.

关键词： Al.Sc.Zr alloy thermal treatment cold deformation mechanical properties conductivity

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Corrigendum to “2D Nanosilicate for additive manufacturing: Rheological modifier, sacrificial ink and support bath Bioprinting” [Bioprinting 25 (2022) e00187]

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Bioprinting 2025年 49卷

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

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