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dental remineralization via poly(amido amine) and restorative materials containing calcium phosphate nanoparticles

International Journal of Oral Science 2019年第3期11卷 180-191页

作者： Kunneng Liang Suping wang Siying tao Shimeng Xiao han zhou ping wang Lei Cheng Xuedong zhou Michael d.weir Thomas w.Oates Jiyao Li hockin h.K.Xu State Key Laboratory of Oral diseases & National Clinical Research Center for Oral diseases & d.p.rtment of Cariology and Endodontics West China Hospital of StomatologySichuan UniversityChengduChina d.p.rtment of Advanced Oral Sciences and Therapeutics University of Maryland School of DentistryBaltimoreMDUSA d.p.rtment of Operative dentistry and Endodontics & Stomatology Center The First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina Center for Stem Cell Biology & Regenerative Medicine University of Maryland School of MedicineBaltimoreMDUSA Marlene and Stewart Greenebaum Cancer Center University of Maryland School of MedicineBaltimoreMDUSA

Tooth decay is prevalent,and secondary caries causes restoration failures,both of which are related to *** is an urgent need to develop new therapeutic materials with remineralization *** article represents the first review on the cutting edge research of poly(amido amine)(pAMAM) in combination with nanoparticles of amorphous calcium phosphate (NACp).pAMAM was excellent nucleation template,and could absorb calcium (Ca) and.p.osphate (p) ions via its functional groups to activate *** composite and adhesive sh.w.d acid-neutralization and Ca and.p.ion release *** +NACp together sh.w.d synergistic effects and.p.oduced triple benefits: excellent nucleation templates,superior acidneutralization,and ions ***,the pAMAM+NACp strategy possessed much greater remineralization capacity than using pAMAM or NACp ***+NACp achieved dentin remineralization even in an acidic solution without any initial Ca and.p.***,the long-term remineralization capability of pAMAM+NACp was *** prolonged fluid challenge,the immersed.p.MAM with the recharged NACp still induced effective dentin mineral ***,the hardness of predemineralized dentin was increased back to that of healthy dentin,indicating a complete ***,the novel pAMAM+NACp approach is promising to provide long-term therapeutic effects including tooth remineralization,hardness increase,and caries-inhibition capabilities.

关键词： an urgent need calcium phosphate dentin

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Study of the CKM angleγsensitivity using flavor untagged B_(s)^(0)→d^(+)^(0)Ф decays

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Chinese physics C 2021年第2期45卷 56-92页

作者： d.Ao d.decamp w.B.Qian S.Ricciardi h.Sazak S.T’Jampens V.Tisserand z.R.wang z.w.yang S.N.zhang X.K.zhou University of Chinese Academy of Sciences Beijing 100049China UnivGrenoble Alpes UnivSavoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance STFC Rutherford Appleton Laboratory DidcotUnited Kingdom UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Center for high Energy physics Tsinghua UniversityBeijing 100084China School of physics State Key Laboratory of Nuclear physics and Technology Peking UniversityBeijing 100871China

A sensitivity study on the measurement of the CKM angle γ from B_(s)^(0)→d^(+)^(0)Ф decays is conducted us-ing the d-meson reconstructed in the quasi flavour-specific modes Kπ,K3π,and Kππ^(0),as well as Cp-eigenstate modes KK and m,where the notation dO corresponds toa d0 or d0 *** LhCb experiment is presented as a use case.A statistical uncertainty of approximately 8°-19°can be achieved with the pp collision data collcted in the LhCb experiment from 2011 to *** sensitivity to r should be of the order 3°-8°after accumulating 23 fb^(-1) of pp collision data by 2025,whereas it is expected to improve further by 300 fb^(-1) by the second half of the 2030 *** accuracy is d.p.ndent on the strong parameters r and og,which together with ydescribe the interfer-ence between the leading ampliudes of the B_(s)^(0)→d^(+)^(0)Ф decays.

关键词： sensitivity study CKM angleyγ B_(s)^(0)→d^(+)^(0)Фdecays

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A Cluster dynamics Model for Accumulation of helium in Tungsten under helium Ions and Neutron Irradiation

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Communications in Computational physics 2012年第5期11卷 1547-1568页

作者： Y.G.Li w.h.zhou R.h.Ning L.F.huang z.zeng X.Ju Key Laboratory for Materials physics Institute of Solid State PhysicsChinese Academy of SciencesHefei230031China d.p.rtment of physics University of Science and Technology BeijingBeijing 100083China

A cluster dynamics model based on rate theory has been developed to describe the accumulation and diffusion processes of helium in tungsten under helium implantation alone or synergistic irradiationwith neutron,by involving different types of objects,ad.p.ing up-to-date parameters and complex reaction processes as well as considering the diffusion process along with *** calculated results under different conditions are in good agreement with experiments much *** model describes the behavior of helium in tungsten within 2d space of defect type/size and d.p.h on different ions incident conditions(energies and fluences)and material conditions(system temperature and existent sinks),by including the synergistic effect of helium-neutron irradiations and the influence of inherent sinks(dislocation lines and grain boundaries).The model,coded as IRadMat,would be universally applicable to the evolution of defects for ions/neutron irradiated on plasma-facing materials.

关键词： Cluster dynamics model rate theory helium and neutron irradiation tungsten accumulation and diffusion

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STUdY ON ThE hOT dEFORMATION BEhAVIORS OF Al-zn-Mg-Cu-Cr ALUMINUM ALLOY

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Acta Metallurgica Sinica(English Letters) 2008年第2期21卷 109-115页

作者： G. Y. Lin z.F. zhang h. zhang d.S. peng J. zhou School of Materials Science and Engineering Central South University Changsha 410083 China

The hot deformation behaviors and microstructures of A1-zn-Mg-Cu-Cr aluminum alloy have been studied using thermal simulation test, optical microscopy and transmission electron microscopy. As a result, the true stress versus true strain curves and the microstructures under various deformation conditions are obtained. The microstructures gradually incline to dynamic-recrystallization with the deformation temperature rising and the recrystallization grains refine with the decrease of deformation temperature or with raising the strain rates. The quantitative relationship between the zener-hollomon parameter （z） and average recrystallization grain size in the subsequent heat treatment is set up.

关键词： A1-zn-Mg-Cu-Cr aluminum alloy hot deformation True stressvs true strain curve Microstructure

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EFFECTS OF zn CONCENTRATION ON wETTABILITY OF Sn-zn ALLOY ON Cu ANd ON ThE INTERFACIAL MICROSTRUCTURE BETwEEN Sn-zn ALLOY ANd Cu

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Acta Metallurgica Sinica(English Letters) 2006年第4期19卷 251-257页

作者： h.z. huang X.Q. wei L. zhou X.d. Liu G.L. Guo School of Materials Science and Engineering Nanchang University Nanchang 330047 China East China Institute of Technology Fuzhou 344000 China

The potential of using a hypoeutectic, instead of eutectic, Sn-zn alloy as a lead-free solder has been discussed. The nonequilibrium melting behaviors of a series of Sn-zn alloys were examined by differential thermal analysis. It was found that at a heating rate of 5℃/min, *** exhibited no melting range. d.p.ing and spreading tests were carried out to characterize the wettability of Sn-zn alloys on Cu. Both tests exhibited that Sn-6.5zn has significantly better wettability on Cu than Sn-9zn. The reaction layers formed during the spreading tests were examined. when the zn concentration fell between 2.5wt%-9wt%, two reaction layers were formed at the interface, a thick and flat Cu5zn8 adjacent to Cu and a thin and irregular Cu-zn-Sn layer adjacent to the alloy. Only a Cu0Sn5 layer was formed when the zn concentration decreased to 0.5wt%. The total thickness of the reaction layer（s） between the alloy and Cu was found to increase linearly with the zn concentration.

关键词： lead-free solder Sn-zn alloy wettability interface intermetallic compound

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A Multifunctional Fluorescence Europium-Organic Framework for Turn-On Sensing of ph and Turn-Off Sensing of 2-Thiazolidinethione-4-carboxylic Acid and Aztreonam

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Chinese Journal of Chemistry 2023年第3期41卷 265-272页

作者： zhenqi Tan Yue Quan Yufen Li tao yang Xinhui zhou Yujian You Key Laboratory for Organic Electronics and Information displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts&TelecommunicationsNanjingJiangsu210023 China

A luminescent lanthanide-organic framework[Eu_(2)(ad.p.(h_(2)ad.p.(dMF)_(2)]·Ch_(3)Oh(1)was synthesized by a solvothermal method using anthracene-based ligand 5,5’-(anthracene-9,10-diyl)diisophthalic acid(h4ad.p..1 possesses a 3d coordination framework,which could be rationalized as a 4,8-connected 2-nodal(4^(16)6^(12))(4^(4)6^(2))topological network.1 sh.w. an excellent linear increase in fluorescence intensity as the ph value rises from 4.8 to ***,the fluorescence enhancement percentage reaches 588%for each increase of ph value,which is the highest value recorded for fluorescence ph sensing materials,promoting the sensitivity of ph detection within the physiological ph *** addition,1 can also specifically recognize carbon disulfide biomarkers 2-thiothiazolidine-4-carboxylic acid(TTCA)and antibiotic aztreonam(ATM)by fluorescence quenching,with the KSV values of 1.02×10^(5)L·mol^(-1)(0-10μmol·L^(-1))and 4.67×10^(5)L·mol^(-1)(0-50μmol·L^(-1)),the limit of detection(LOd)of 86 nmol·L^(-1)and 19 nmol·L^(-1),*** only a few cases reported,the detection sensitivities of 1 for both TTCA and ATM are the *** sensing mechanisms of ph,TTCA,and ATM are also discussed in detail.

关键词： Metal-organic framework Fluorescence Sensors Antibiotic Absorption 3d

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IN SITU TEM OBSERVATION OF INITIATION ANd.p.OpAGATION OF CRACKS IN NiAlFe INTERMETALLICS

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Acta Metallurgica Sinica(English Letters) 1996年第6期9卷 675-679页

作者： Y.X. Lu C.h. tao J.w.zhang M.L.Xue and d.z. yang(Beijing Institute of Aeronautical Materials, Beijing 100095, China harbin Institute of Technology, harbin 150001,China Yanshan University,Qinhuangdao 066004, ) Beijing Inst of Aeronautical Materials Beijing China

Formation of the dislocation hoe zone(dFz),and initiation and.p.opagation of microcracks have been investigated by in situ transmission electron microscope(TEM)tensile test for NiAlFe *** TEM foils are strained,a great number of dislocations are found to emit from a crack tip during microcrack propagation and drive out of the crack tip area,leaving behind a *** maximum normal stress exists in the dFz, thus nanocracks initiate discontinuously ahead of the crack tip in the highly stressed dFz. Connection of the main crack and nanocracks results in steady propagation of *** fracture and bluntness of the crack tip indicate that propagation of the crack is a leaping process. The second.p.ase in the NiAlFe alloy obstructs propagation of the crack, which results in deviation of the crack path.

关键词： NiAlFe alloy crack TEM observation

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hIGh-CURRENT pULSEd ELECTRON BEAM: RApId SURFACE ALLOYING ANd wEAR RESISTANCE IMpROVEMENT

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Acta Metallurgica Sinica(English Letters) 2003年第4期16卷 276-282页

作者： J.Xu h.w.Liu z.R.zhou C.dong A.M.wu S.z.h.o A.M.zhang T.Xu TribologyResearchInstitute SouthwestJiaotongUniversityChengdu610031ChinaManuscriptreceived25November2002 StateKeyLab.forMaterialsModificationbyLaser IonandElectronBeamsDalianUniversityofTech-nologyDalian116024China StateKeyLaboratoryofSolidLubrication LanzhouInstituteofChemicalPhysicsTheChineseAcademyofSciencesLanzhou730000China

The present paper reports the rapid surface alloying induced by the bombardment of high-current pulsed electron beam. Two kinds of substrate materials were examined to sh.w.this effect. The first sample was a pure Al metal pre-coated with fine carbon powders prior to the bombardment, and the second alloy is the d2-Crl2MolVl mould steel pre-coated with Cr, Ti, and TiN powders. The surface elements diffuse about several micrometers into the substrate materials only after several bombardments. Tribological behaviors of these samples were characterized and significant improvement in wear resistance was found. Finally, a TEM analysis reveals the presence of stress waves generated by coupled thermal and stress fields, which.w.s considered as the main cause of the enhanced.p.operties.

关键词： high-current pulsed electron beam surface alloying tribology fretting wear

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Morphology Control and Optical Absorption properties of Ag Nanoparticles by Ion Implantation

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Journal of Materials Science & Technology 2009年第5期25卷 669-672页

作者： G.X. Cai F. Ren X.h. Xiao L.X. Fan X.d. zhou C.z. Jiang Key Laboratory of Acoustic and.p.otonie Materials and devices of Ministry of Education Wuhan University Wuhan 430072 China

Ion implantation is a powerful method for fabricating nanoparticles in dielectric. For the actual application of nanoparticle composites, a careful control of nanoparticles has to be achieved. In this letter, the size, distribution and morphology of Ag nanoparticles are controlled by controlling the ion current density, ion implantation sequence and ion irradiation dose. Single layer Ag nanoparticles are formed by Ag^＋ ion implantation at current density of 2.5 μ^A/cm2. By Ag and Cu ions sequential implantation, the size of single layer Ag nanoparticles increases. while, by Cu and Ag ions sequential implantation, uniform Ag nanoparticles with.w.de distribution are formed. The morphology of Ag nanoparticles changes to hollow and sandwiched nanoparticles by Cu^＋ ion irradiation to doses of 3×10^16 and 5×10^16 ions/cm^2. The optical absorption properties of Ag nanoparticles are also tailored by these ways.

关键词： Nanoparticles Ion implantation Transmission electron microscopy

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Cucurbit[n]uril-calix[n]arene-based supramolecular frameworks assembled using the outer surface interactions of cucurbit[n]urils

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Chinese Chemical Letters 2021年第1期32卷 375-379页

作者： Ming Liu yang zhou Lixia Chen Bing Bian Xin Xiao zhu tao Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou province Guizhou UniversityGuiyang 550025China College of Chemistry Chemical Engineering and Materials Science.Shandong Normal UniversityJi'nan 250014China College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China

Based on the crystal structures of two cucurbit[6]uril/calix[n]arene-based supramolecular frameworks reported by Long and co-workers,we further investigated the interactions of cucurbit[6]uril with 4-sulfocalix[4]arene and 4-sulfocalix[6]arene using ^(1)h NMR spectroscopy and isothermal titration calorimetry(ITC),***,solid fluorescent materials were prepared via the adsorption of fluorescent dyes by these porous supramolecular frameworks,which exhibit a selective response to certain volatile organic compounds.

关键词： Cucurbit[n]urils Calix[n]arene Outer surface interaction of Q[n]s Supramolecular frameworks Functional properties

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