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Yanru Yin,Changna Wen,Ning Ma,Baoyan Wang,Lianying Zhang,Hongliang Li,Peizhi Guo 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.9
Palladium and palladium-silver bimetallic nanocrystals have been synthesized hydrothermally by using environmental-friendly sodium alginate as the stabilizer and reducing agent. The pure palladium nanoparticles were spherical-like possibly due to the principle of the lowest surface energy, however, the formation of bimetallic palladium-silver nanoparticles was much more complicated, which was thinner and more irregular nanostructures than pure palladium nanoparticles. Electrochemical measurements showed that the electrocatalytic activity toward ethanol oxidation was increased first with the increase of silver content in bimetallic nanoparticles, from pure palladium of around 1070 mA/mg, to PdAg-20 of 1160 mA/mg and to PdAg-10 of 1750 mA/mg, and declined greatly at a high content of silver, approximately 279 mA/mg. Electrochemical stability test showed that PdAg-10 and PdAg-5 were the best and worst among four palladium-based samples, respectively. Based on the experimental data, the formation mechanism of pure palladium and palladium-silver bimetallic nanoparticles and the structure-property relationship of these samples have been discussed.
Chenjie Meng,Jiaming Zhao,Yuxiang Yin,Jun Luo,Lianying Zhao,Wenbin Jiang,Jianyong Feng 한국섬유공학회 2020 Fibers and polymers Vol.21 No.4
Three-dimensional (3D) printing technology provides an effective alternative for tissue engineering scaffold. Inthis paper, a composite scaffold composed of polylactic acid (PLA) film and 3D printing scaffold was fabricated which couldprovide structural and mechanical support for tissue application. The effects of PLA film/3D printing composite scaffold onscaffold morphology, average diameter, pore diameter, mechanical properties, themal conductivity, electrical conductivity,and surface hydrophilicity were characterized. PLA film/3D printing composite scaffold had larger thickness, bettermechanical and thermal conductivity properties in comparison with pure PLA film and 3D printed scaffold. These resultssuggested that composite scaffold with relatively good overall performance could be a potential candidate for tissueengineering application.
Chao Ma,Xing Duan,Xiaoqian Guo,Hua Qiao,Lianying Zhang,Xianbiao Mao,Peidong Wu 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.2
The deformation mechanisms of a rolled high-purity α-titanium plate under monotonic loading along the rolling direction(RD), transverse direction (TD), and normal direction (ND) are investigated by the Elastic Visco-Plastic Self-Consistent(EVPSC) model, which incorporates a Twinning and De-Twinning (TDT) scheme to describe twinning behavior duringstraining. In the EVPSC-TDT model, plastic deformation is assumed to be accommodated by prismatic, basal and pyramidal⟨c + a⟩ slip modes as well as the 10̄12 extension and 11̄22 contraction twin modes. Numerical results based on theEVPSC-TDT model are in good agreement with the corresponding experimental data. The tension–compression asymmetry,anisotropic initial yielding and strain hardening behavior are interpreted in terms of the predicted relative activities of variousdeformation modes, twin volume fractions and texture evolutions. It is demonstrated that twinning plays an important rolein tension–compression asymmetry and plastic anisotropy, which is closely related to the loading direction with respect tocrystal orientations in the initial texture. In addition, it can be concluded that the TDT scheme permits better performancein describing twinning-associated deformation behavior for the rolled high-purity α-titanium plate than the PredominantTwin Reorientation (PTR) model even when detwinning is not involved.
Liani, Mohamed,Moulay, Noureddine,Bourada, Fouad,Addou, Farouk Yahia,Bourada, Mohamed,Tounsi, Abdelouahed,Hussain, Muzamal Techno-Press 2022 Advances in materials research Vol.11 No.1
In this paper, the nonlocal integral Timoshenko beam model is employed to study the free vibration characteristics of singled walled carbon nanotubes (SWCNTs) including the thermal effect. Based on the nonlocal continuum theory, the governing equations of motion are formulated by considering thermal effect. The influences of small scale parameter, the chirality of SWCNTs, the vibrational mode number, the aspect ratio of SWCNTs and temperature changes on the thermal vibration properties of single-walled nanotubes are examined and discussed. Results indicate significant dependence of natural frequencies on the nonlocal parameter, the temperature change, the aspect ratio and the chirality of SWCNTs. This work should be useful reference for the application and the design of nanoelectronics and nanoelectromechanical devices that make use of the thermal vibration properties of SWCNTs.
Oh, S. H.,Baek, J.,Liany, H.,Foo, J. N.,Kim, K. M.,Yang, S. C.,Liu, J.,Song, K. ELSEVIER SCIENCE B.V; AMSTERDAM 2016 JOURNAL OF CROHNS AND COLITIS Vol.10 No.11
<P>Interleukin-10 receptor [IL10R] mutations are associated with severe childhood inflammatory bowel disease [IBD]. Two unrelated patients who died of very early-onset severe IBD and sepsis were identified as harbouring the same compound heterozygous mutations in IL10RA [p.R101W; p.T179T]. A third patient was found to be homozygous for p.T179T. The missense change of p.R101W has been reported. The synonymous change of p.T179T, with a minor allele frequency of 0.035% in the population, was novel. The p.T179T mutation was located before the 5' splice donor site, leading to exon skipping and out-of-frame fusion of exons 3 and 5, causing altered STAT3 phosphorylation in IL10-induced peripheral blood mononuclear cells. The patient developed colitis at 6 years of age, the oldest reported age of onset among patients with IL10RA mutations, and did not suffer from perianal disease. We report three paediatric patients with a rare, synonymous p.T179T variant causing a splicing error in IL10RA.</P>