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Effect of Eu3+,Bi3+,and Li+ doping on luminescent property.of GdNbO4

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journal of Rare Earths 2024年第1期42卷 66-75页

作者： S.W.Wi y.S.lee Department of Phy.ics and Integrative Institute of Basic Sciences Soongsil University

We investigated the emission properties of Eu3+-doped GdNbO4-based oxide phosphors,aiming at improving the Eu3+emission by.codoping of Bi3+and Li+.Eu3+singly.doped,Eu3+and Bi3+doubly.doped,and Eu3+,Bi3+,and Li+triply.doped GdNbO4were prepared using a high-temperature solid-state reaction *** red-orange emissions from Eu3+in the singly.doped samples are significantly.improved by.the codoping of Bi3+,mainly.due to the energy.transfer from Bi3+to Eu3+.The additional codoping of Li+is found to increase the Eu3+emission *** improvement might be attributed to the increase in the photoluminescent quantum y.eld originating from larger grain sizes and better cry.tallinity.A detailed analy.is of the X-ray.diffraction pattern and the asy.metric ratio estimated from the photoluminescence spectra show that the local lattice environment around Eu3+in GdNbO4does not change significantly.with the codoping of Bi3+and Li+.Our results indicate that Li+doping is a promising way.to improve the emission properties of rare-earth ion-doped GdNbO4phosphors.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Photoluminescence Sensitizer Rare earths

内瑟顿综合征:报道2例患有葡萄球菌烫伤样皮肤综合征的台湾双胞胎及其SPINK5位点的点突变

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世界核心医学期刊文摘（皮肤病学分册） 2005年第6期1卷 51-52页

作者： Richard G. lee j.y.-y. 潘敏 Department of Dermatology School of Medicine National Cheng Kung University 138 Sheng-Li Road TainanChina Taiwan

Netherton sy.drome (NS) is a severe autosomal recessive ichthy.sis. It is characterized by.congenital ichthy.siform ery.hroderma, trichorrhexis invaginata, ichthy.sis linearis circumflexa, atopic diathesis and frequent bacterial infections. Pathogenic mutations in SPINKS have recently.been identified in NS. SPINKS encodes ly.phoepithelial Kazal-ty.e-related inhibitor (LEKTI), a new ty.e of serine protease inhibitor involved in the regulation of skin barrier formation and immunity. We report two Taiwan Residents brothers with NS. The patients had ty.ical manifestations of NS with an atopic diathesis and recurrent staphy.ococcal infections, including staphy.ococcal scalded skin sy.drome (SSSS) since birth. Horny.lay.rs were obtained by.skin surface biopsy.for electron microscopy.from lesional skin of both patients and from normal controls. All 33 exons and flanking intron boundaries of SPINKS were amplified for direct sequencing. The ultrastructure of the stratum corneum (SC) was characterized by.premature degradation of corneo desmosomes (CDs) with separation of corneocy.es. A homozy.ous 2260A→ T (K754X) mutation of SPINK5 was found in both patients. Staphy.ococcal exfoliative toxin A (ETA) is a serine protease capable of cleaving desmoglein 1, an important adhesive molecule of CDs, and can cause separation of the SC, resulting in SSSS. The premature degradation of CDs found in our patients may.be attributable to insufficient LEKTI, and possibly.also to colonization/infection of ETA-producing Stophy.ococcus aureus. Mechanisms involved in the pathogenesis of the skin barrier defect in NS are proposed. Further study.is needed to prove this hy.othesis.

关键词： SPINK5 鱼鳞病样红皮病迂回线状鱼鳞病点突变过敏性体质角质层分离葡萄球菌感染常染色体隐性直接测序套叠

Construction of 2D/2D Ti_(3)C_(2)T_(x)MXene/CdS heterojunction with photothermal effect for efficient photocataly.ic hy.rogen production

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journal of Materials Science & Technology 2024年第4期171卷 1-9页

作者： T.y.Huang Z.y.ng S.y.y.ng Z.H.Dai y.j.Liu j.H.Liao G.y.Zhong Z.j.Xie y.P.Fang S.S.Zhang Key.Laboratory.for Biobased Materials and Energy.of Ministry.of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China School of Phy.ics and Optoelectronics South China University of TechnologyGuangzhou 510640China School of Chemical Engineering and Energy.Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity.of semiconductors to visible and infrared light is a key.constraint on the utilization of light energy.in photocataly.ic *** photocataly.ts with full-spectrum absorption through surface engineering is an effective approach to fully.harnessing light energy.in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/CdS heterojunction cataly.t is obtained by.in-situ epitaxial growth of two-dimensional(2D)CdS nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-aly.ic hy.rogen evolution capability.upon the heterogeneous *** unique 2D/2D structure effectively.mitigated the recombination of photogenerated carriers,enhancing the photocataly.ic performance of the ***,the composite cataly.t exhibits a significantly.higher surface temperature of 80.4℃under visible light irradiation at an intensity.of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite cataly.t with photothermal ef-fect demonstrates a remarkable hy.rogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of CdS *** study.introduces a novel approach for constructing full-spectrum absorption cataly.ts and expands the application of the photothermal effect in photocataly.ic hy.rogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocataly.t Hy.rogen evolution

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瘢痕疙瘩与肥厚性瘢痕的组织病理学鉴别诊断

世界核心医学期刊文摘（皮肤病学分册） 2005年第1期1卷 26-27页

作者： lee j.y.-y. Wong T.-W. 牛新武 Department of Dermatology Natl. Cheng Kung University Hospital 138 Sheng-Li Rd. Tainan Taiwan Dr.

Distinguishing hy.ertrophic scar (HS) from keloid histopathologically.is sometimes difficult because thickened hy.linized collagen (keloidal collagen), the hallmark of keloid, is not alway. detectable and α-smooth muscle actin (α-SMA), a differentiating marker of HS, is variably.expressed in both forms of scar. The aim of this study.was to investigate additional distinguishing features to facilitate differentiation between keloid and HS. We compared various histologic features and the expression of α-SMAin 40 specimens of keloid and 10 specimens of HS. The features more commonly.seen in keloids were: (a)-no flattening of the overly.ng epidermis, (b) no scarring of the papillary.dermis, (c) presence of keloidal collagen, (d) absence of prominent vertically.oriented blood vessels, (e) presence of prominent disarray.of fibrous fascicles/nodules, (f) presence of a tongue-like advancing edge underneath normal-appearing epidermis and papillary.dermis, (g) horizontal cellular fibrous band in the upper reticular dermis, and (h) prominent fascialike fibrous band. The last three features were found in keloid specimens only. including the ones lacking detectable keloidal collagen. Our study.confirmed the diagnostic value of keloidal collagen, but it was only.found in 55%of keloid specimens. α-SMAexpressionwas found in bothHS (70%) and keloid (45%), thus it would not be a differentiating marker. In scars with no detectable keloidal collagen, the presence of the following feature(s) favors the diagnosis of keloid: non-flattened epidermis, non-fibrotic papillary.dermis, a tongue-like advancing edge, horizontal cellular fibrous band in the upper reticular dermis, and prominent fascia-like band.

关键词：瘢痕疙瘩肥厚性瘢痕鉴别诊断组织病理学瘢痕形成纤维束真皮乳头水平细胞纤维变性区别特征

Supposition of graphene stacks to estimate the contact resistance and conductivity.of nanocomposites

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Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 663-676页

作者： y.ZARE M.T.MUNIR G.j.WENG K.y.RHEE Biomaterials and Tissue Engineering Research Group Department of Interdisciplinary TechnologiesBreast Cancer Research CenterMotamed Cancer InstituteTehran ***Iran College of Engineering and Technology American University of the Middle EastEgaila 54200Kuwait Department of Mechanical and Aerospace Engineering Rutgers UniversityNew BrunswickNJ 08903U.S.A. Department of Mechanical Engineering(BK21 Four) College of EngineeringKyung Hee UniversityYongin 446701Republic of Korea

In this study.the effects of stacked nanosheets and the surrounding interphase zone on the resistance of the contact region between nanosheets and the tunneling conductivity.of samples are evaluated with developed equations superior to those previously.*** contact resistance and nanocomposite conductivity.are modeled by.several influencing factors,including stack properties,interphase depth,tunneling size,and contact *** developed model's accuracy.is verified through numerous experimental *** further validate the models and establish correlations between parameters,the effects of all the variables on contact resistance and nanocomposite conductivity.are ***,the contact resistance is primarily.dependent on the poly.er tunnel resistivity.contact area,and tunneling *** dimensions of the graphene nanosheets significantly.influence the conductivity.which ranges from 0 S/m to90 S/*** increased number of nanosheets in stacks and a larger gap between them enhance the nanocomposite's ***,the thicker interphase and smaller tunneling size can lead to higher sample conductivity.due to their optimistic effects on the percolation threshold and network efficacy.

关键词： graphene poly.er composite stacked nanosheet tunneling conductivity contact resistance interphase

Cavity.agnostic acoustofluidic manipulations enabled by.guided flexural waves on a membrane acoustic waveguide actuator

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Microsy.tems & Nanoengineering 2024年第2期10卷 153-171页

作者： Philippe Vachon Srinivas Merugu jaibir Sharma Amit Lal Eldwin j.Ng y.l Koh joshua E.-y.lee Chengkuo lee Department of Electrical and Computer Engineering National University of SingaporeSingaporeSingapore Institute of Microelectronics Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore SonicMEMS Laboratory School of Electrical and Computer EngineeringCornell UniversityIthacaNYUSA School of Electrical and Data Engineering University of Technology SydneyUltimoNSWAustralia

This article presents an in-depth exploration of the acoustofluidic capabilities of guided flexural waves(GFWs)generated by.a membrane acoustic waveguide actuator(MAWA).By.harnessing the potential of GFWs,cavity.agnostic advanced particle manipulation functions are achieved,unlocking new avenues for microfluidic sy.tems and lab-on-a-chip *** localized acoustofluidic effects of GFWs arising from the evanescent nature of the acoustic fields they.induce inside a liquid medium are numerically.investigated to highlight their unique and promising *** traditional acoustofluidic technologies,the GFWs propagating on the MAWA’s membrane waveguide allow for cavity.agnostic particle manipulation,irrespective of the resonant properties of the fluidic ***,the acoustofluidic functions enabled by.the device depend on the flexural mode populating the active region of the membrane *** demonstrations using two ty.es of particles include in-sessile-droplet particle transport,mixing,and spatial separation based on particle diameter,along with streaming-induced counter-flow virtual channel generation in microfluidic PDMS *** experiments emphasize the versatility.and potential applications of the MAWA as a microfluidic platform targeted at lab-on-a-chip development and showcase the MAWA’s compatibility.with existing microfluidic sy.tems.

关键词： waveguide fluid cavity

Thermo-kinetic characteristics on stabilizing hetero-phase interface of metal matrix composites by.cry.tal plasticity.finite element method

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journal of Materials Science & Technology 2024年第2期169卷 53-67页

作者： y.B.Zhang S.j.Song F.Liu State Key.Laboratory.of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Analy.ical&Testing Center Northwestern Polytechnical UniversityXi’an 710072China

Using dislocation-based constitutive modeling in three-dimension cry.tal plasticity.finite element(3D CPFE)simulations,co-deformation and instability.of hetero-phase interface in different material sy.tems were herein studied for poly.ry.talline metal matrix composites(MMCs).Local stress and strain fields in two ty.es of 3lay.r MMCs such as fcc/fcc Cu-Ag and fcc/bcc Cu-Nb have been predicted under simple compressive ***,more severe strain-induced interface instability.can be observed in the fcc/bcc sy.tems than in the fcc/fcc sy.tems upon refining to metallic nanolay.red composites(MNCs).By.detailed analy.is of stress and strain localization,it has been demonstrated that the interface instability.is alway. accompanied by.high-stress concentration,i.e.,thermody.amic characteristics,or high strain prevention i.e.,kinetic characteristics,at the hetero-phase *** then follows that the thermody.amic driving forceG and the kinetic energy.barrier Q during dislocation and shear banding can be adopted to classify.the deformation modes,following the so-called thermo-kinetic *** by.inserting a high density.of high-energy.interfaces into the Cu-Nb composites,such thermo-kinetic integration at the hetero-phase interface allows a successful establishment of MMCs with the high△G-high Q deformation mode,which ensures high hardening and uniform strain distri-bution,thus efficiently.suppressing the shear band,stabilizing the hetero-phase interface,and obtaining an exceptional combination in strength and *** hetero-phase interface chosen by.a couple of thermody.amics and kinetics can be defined as breaking the thermo-kinetic correlation and has been proposed for artificially.designing MNCs.

关键词： Thermody.amics and kinetics Phy.ics-based constitutive modeling Hetero-phase interface Cry.tal plasticity.finite element

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On B(5,20)2-Groups

Algebra Colloquium 2024年第3期31卷 429-440页

作者： E.A.Alhassan y.L.Tan y.Li School of Mathematical Sciences Jiangsu UniversityZhenjiangJiangsu 212013China Department of Mathematics Brock UniversitySt.CatharinesOntario L2S 3A1Canada

A finite group G is said to be a B(n,k)group if for any.n-element subset[a_(1),…,a_(n)]of G,|{a_(i)a_(j)|1≤i,j≤n}|≤*** is of interest to characterize the structure of B(n,k)groups for n(n+1)/2≤k≤n^(2)-*** B(5,k)groups for 15≤k≤19 have been investigated by.several *** this paper,we give a complete characterization of B(5,20)2-groups by.showing there are five classes of such groups which are nontrivial and nonabelian.

关键词： B(n,k)groups small squaring property central extension GAP

Optimization of chemistry.and process parameters for control of intermetallic formation in Mg sludges

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journal of Magnesium and Alloy. 2024年第4期12卷 1431-1448页

作者： y.Fu G.G.Wang A.Hu y.Li K.B.Thacker j.P.Weiler H.Hu Department of Mechanical Automotive and Materials EngineeringUniversity of Windsor401 Sunset AveWindsorOntario N9B 3P4Canada Global Technology.Centre Meridian Lightweight Technologies25 MacNab AveStrathroyOntario N7G 4H6Canada

Intermetallic formation in sludge during magnesium(Mg)melting,holding and high pressure die casting practices is a very.important ***,very.often it is overlooked by.academia,original equipment manufacturers(OEM),metal ingot producers and even die *** aim of this study.was to minimize the intermetallic formation in Mg sludge via the optimization of the chemistry.and process *** Al8Mn5 intermetallic particles were identified by.the microstructure analy.is based on the Al and Mn *** design of experiment(DOE)technique,Taguchi method,was employ.d to minimize the intermetallic formation in the sludge of Mg alloy. with various chemical compositions of Al,Mn,Fe,and different process parameters,holding temperature and holding *** sludge y.eld(Sy.and intermetallic size(IS)was selected as two *** optimum combination of the levels in terms of minimizing the intermetallic formation were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,690℃ for the holding temperature and holding at 30 mins for the holding time,*** best combination for smallest intermetallic size were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,630℃ for the holding temperature and holding at 60 mins for the holding time,*** groups of sludge factors,Chemical Sludge(CSF),Phy.ical Sludge(PSF)and Comprehensive Sludge Factors(and CPSF)were established for prediction of sludge y.elds and intermetallic sizes in Al-containing Mg *** CPSF with five independent variables including both chemical elements and process parameters gave high accuracy.in prediction,as the prediction of the PSF with only.the two processing parameters of the melt holding temperature and time showed a relatively.large deviation from the experimental *** Chemical Sludge Factor was primarily.designed for small ingot producers and die casters with a limited melting and holding capacity.of which process parameters could be fixed *** Phy.ical Sludge Factor could be used f

关键词： Magnesium sludge Al-Mn intermetallic Optimization Taguchi method Sludge factor Chemical composition Process parameter