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The f.rmation and catalytic activity of.silver nanoparticles in aqueous polyacrylate solutions

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f.ontiers of.chemical Science and Engineering 2016年第3期10卷 432-439页

作者： Jie wang Jianjia liu Xuhong Guo liang Yan Stephen f. lincoln State Key laboratory of.chemical Engineering East China University of Science and Technology Shanghai 200237 China Department of.chemistry University of Adelaide Adelaide SA 5005 Australia

Silver nanoparticles （AgNPs） have been synthesized in the presence of.polyacrylate through the reduction of.silver nitrate by sodium borohydride in aqueous solution. The AgNO3 and polyacrylate carbox- ylate group concentrations were kept constant at 2.0× 10^-4 and 1.0 × 10^-2 mol·l^-1, respectively, while the ratio of.[NaBH4]/[AgNO3] was varied f.om 1 to 100. The ultra- violet-visible plasmon resonance spectra of.these solutions were f.und to vary with time prior to stabilizing af.er 27 d, consistent with changes of.AgNP size and distribution within the polyacrylate ensemble occurring. These obser- vations, together with transmission el.c.ron microscopic results, show this rearrangement to be greatest among the samples at the lower ratios of.[NaBH4]/[AgNO3] used in the preparation, whereas those at the higher ratios showed a more even distribution of.smaller AgNP. All ten of.the AgNP samples, upon a one thousand-f.ld dilution, catalyze the reduction of.4-nitrophenol to 4-aminophenol in the temperature range 283.2-303.2 K with a substantial induction time being observed at the lower temperatures.

关键词： silver nanoparticles polyacrylates catalysis,mechanism sodium borohydride

Estrogen enhances the f.nctions of.cD4^(+)cD25^(+)f.xp3^(+) regulatory T cells that suppress osteoclast dif.erentiation and bone resorption in vitro

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cellular & Mol.c.lar Immunology 2011年第1期8卷 50-58页

作者： cY luo l wang c Sun DJ li laboratory f.r Reproductive Immunology Hospital and Institute of Obstetrics and GynecologyFudan University Shanghai Medical CollegeShanghaiChina Jiangsu Province Hospital the First Affiliated Hospital with Nanjing Medical UniversityNanjingChina Department of.Obstetrics and Gynecology Affiliated HospitalHainan Medical CollegeHaikouChina

cross-talk has been shown to occur between the immune system and bone metabolism *** the present study,we investigated the impact of.cD4^(+)cD25^(+)f.xp3^(+) regulatory T(Treg)cells on osteoclastogenesis and bone *** cells that were isolated and purif.ed f.om peripheral blood mononuclear cells(PBMcs)of.healthy adults inhibited both the dif.erentiation of.osteoclasts(Ocs)f.om human embryo bone marrow cells(BMcs)and the pit f.rmation in a dose-dependent *** cell.c.cultures,the production levels of.both interleukin-10(Il-10)and transf.rming growth f.ctor-beta 1(TGf.β1)were proportionally upregulated as the ratio of.Treg cells to BMcs was increased,and the inhibition of.Oc dif.erentiation and bone resorption by Treg cells was completely reversed by anti-Il-10 and anti-TGf.β1 *** of.BMc and Treg cell.c.cultures with 17β-estradiol(E2)at concentrations between 10^(-7) and 10^(-9) mol/l suppressed Oc dif.erentiation and bone resorption more ef.iciently than it did in cultures of.BMcs alone;this enhanced suppression occurred via the stimulation of.Treg cell Il-10 and TGf.b1 *** data suggest that Treg cells suppress Oc dif.erentiation and bone resorption by secreting Il-10 and TGf.β1.E2 enhances the suppressive ef.ects of.Treg cells on Oc dif.erentiation and bone resorption by stimulating Il-10 and TGf.β1 secretion f.om these ***,Treg cell-derived Il-10 and TGf.b1 are likely involved in the regulation of.E2 on bone metabolism and represent potential therapeutic targets f.r the treatment of.postmenopausal osteoporosis(PMO).

关键词： bone resorption osteoclast PMO regulatory T cells

Real-Time characterization of.f.brinogen Interaction with Modif.ed Titanium Dioxide f.lm by Quartz crystal Microbalance with Dissipation

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chinese Journal of.chemical Physics 2014年第3期27卷 355-360页

作者： An-sha Zhao Zhao wang Xiao-hua Zhu Manf.ed f. Maitz Nan Huang Key laboratory of.Advanced Materials Technology of.Ministry of.Education Department of Materials Science and Engineering Southwest Jiaotong University Chengdu 510031 China leibniz Institute of.Polymer Research Dresden Max Bergmann Center of Biomaterials Dresden Dresden Germany

The adsorption of.f.brinogen can be used as a quick indicator of.surf.ce haemocompatibility because of.its prominent role in coagulation and platelet adhesion. In this work the mol.c.lar interaction between f.brinogen and a modif.ed titanium oxide surf.ce/platelet has been studied by quartz crystal microbalanee with dissipation （QcM-D） in situ. In order to f.rther characterize the conf.rmation of.adsorbed f.brinogen, αc and γ-chain antibody were used to check the orientation and denaturation of.f.brinogen on solid surf.ce. QcM-D investiga- tions revealed the f.brinogen have the trend to adsorb on hydropllil.c.surf.ce in a side-on orientation by positively charged αc domains, which would reduce the exposure of.platelet bonding site on γ chain and enable less platelet adhesion and be activated. These obser- vations suggest that certain conf.rmations of.adsorbed f.brinogen are less platelet adhesive than others, which opens a possibility f.r creating a non-platelet adhesive substrates.

关键词： Quartz crystal microbalance with dissipation f.brinogen adsorption conf.r- mation change Blood platelet

complete Maps f.r the Internal Oxidation of.Ideal Ternary Alloys f.rming Insoluble Oxides under High Oxidant Pressures

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中国腐蚀与防护学报 2009年第4期29卷 253-261页

作者： f. GESMUNDO S. wang Y. NIU State Key laboratory f.r corrosion and Protection Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 DIcHEP Universita di Genova Fiera del Mare Pad. D 16129 Genova Italy

This paper presents an analysis of.the conditions of.stability of.the dif.erent f.rms of.internal oxidation of.ideal ternary A-B-c alloys,where A is the most noble and c the most reactive component, f.rming insoluble oxide and exposed to high pressures of.a single *** treatment,based on an extension to ternary alloys of.Wagner' s criterion f.r the transition f.om internal to external oxidation in binary alloys,allows to predict the existence of.three dif.erent f.rms of.internal *** f.ct,in addition to the most common kinds of.internal attack,involving the coupled internal oxidation of.B+c beneath external AO scales and the internal oxidation of.c beneath external BO scales,a third mode, involving the internal oxidation of.c beneath external scales composed of.mixtures of.AO+BO,becomes also possible under special.c.nditions.A combination of.the boundary conditions f.r the existence of.these dif.erent types of.internal oxidation allows to predict three dif.erent kinds of.complete maps f.r the internal oxidation in these systems,one of.which involves only two modes,while the other two involve all the three possible modes of.internal oxidation.

关键词：镁合金氧化腐蚀金属

Snap-through of.an elastica under bilateral displ.c.ment control at a material point

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Acta Mechanica Sinica 2020年第3期36卷 727-734页

作者： Q.wang H.l.Zou Z.c.Deng Department of.Engineering Mechanics Northwestern Polytechnical UniversityXi'an 710072China

Snap-through phenomenon widely occurs f.r elastic systems,where the systems lose stability at critical *** snapthrough of.an elastica under bilateral displ.c.ment control at a material point is studied,by regarding the whole elastica as two components,i.e.,pinned-clamped ***,stif.ness-curvature curves of.two pinned-clamped elasticas are f.rstly ef.iciently l.c.ted based on the second-order mode,which are used to determine the shapes of.two *** transf.rmations are used to assemble two components together to f.rm the whole elastica,which reveals f.ur kinds of.*** advantage of.this way compared with other methods such as the shooting method is that multiple coexisting solutions can be l.c.ted accurately.O n the load-def.0}ion curves,f.ur branches correspond to f.ur kinds of.shapes and f.rst two branches are symmetrical to the last two branches relative to the original *** the bilateral displ.c.ment control,the critical points can only appear at saddle-node bif.rcations,which is dif.erent to that f.r the unilateral displ.c.ment ***,one critical point is f.und on the f.rst branch and two critical points are f.und on the secondary *** addition,the snap-through among dif.erent branches can be well explained with these critical points.

关键词： Elastica Snap-through critical points Buckling Displ.c.ment control

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嫁接对瓠瓜抗病抗逆性及果实品质的影响

核农学报 2025年第1期39卷 191-200页

作者：王海燕汪颖王尖邢乃林李国景徐沛吴晓花中国计量大学生命科学学院浙江杭州310018 浙江省农业科学院蔬菜研究所浙江杭州310021 宁波市特色园艺作物品质调控和抗性育种重点实验室浙江宁波315040

为探究嫁接对瓠瓜抗病抗逆性和果实品质的影响,以瓠瓜自根苗为对照,比较4种南瓜型砧木(全能铁甲、思壮12、砧西316、黑武士)嫁接浙蒲9号瓠瓜的成活率、枯萎病抗性、低温弱光性及耐盐性、果实品质等差异,并通过主成分分析及隶属函数法对... 详细信息

为探究嫁接对瓠瓜抗病抗逆性和果实品质的影响,以瓠瓜自根苗为对照,比较4种南瓜型砧木(全能铁甲、思壮12、砧西316、黑武士)嫁接浙蒲9号瓠瓜的成活率、枯萎病抗性、低温弱光性及耐盐性、果实品质等差异,并通过主成分分析及隶属函数法对不同嫁接组合进行综合评价。结果表明,浙蒲9号/思壮12嫁接组合的成活率最高(94.87%),不同砧穗组合枯萎病抗性均较对照增强。浙蒲9号/思壮12在低温弱光下的最大光化学效率(f./f.)最高,在200 mmol·l^(-1)Nacl胁迫下生长较好。与自根苗相比,嫁接植株长势均变旺,果实的维生素c含量降低,其他指标均有不同程度的提升。浙蒲9号/全能铁甲的果实可溶性固形物含量最高,浙蒲9号/砧西316的果实钙含量最高,浙蒲9号/黑武士的果实蛋白质和镁含量最高。浙蒲9号/思壮12的产量、果实游离谷氨酸和钾含量最高,硬度和可滴定酸含量最小,瓠瓜品质有所提升。同时,主成分分析和隶属函数值综合评价结果表明,浙蒲9号/思壮12的D值为0.914,排名第一。综上,嫁接可以增强瓠瓜枯萎病抗性,不同程度提高瓠瓜的低温、盐胁迫耐受性,合理选择砧木可提高瓠瓜果实品质,以思壮12为砧木嫁接浙蒲9号瓠瓜综合表现最佳。本研究结果为适宜瓠瓜嫁接砧木的选择提供了技术支持。

关键词：瓠瓜嫁接抗病抗逆性果实品质综合评价

Seasonal dependency of.controlling f.ctors on the phytoplankton production in Taihu lake, china

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Journal of.Environmental Sciences 2019年第2期31卷 278-288页

作者： Qiaohua Zhao Jing wang Jianjian wang Julian X.l.wang college of.Hydrometeorology Nanjing University of Information Science and Technology Air Resources laboratory National Oceanic and Atmospheric AdministrationCollege Park

In this study, 44 prof.les of.gross primary productivity(GPP) and sunlight, along with water temperature, chlorophyll-a(chla) and nutrients, were observed in Meiliang Bay of.Taihu lake, china, in the spring, summer, and f.ll seasons. Ef.ects of.water temperature, light,and nutrient concentration were examined in relation to the GPP-unit-chla(GPP of.algae per chla). The results showed that the optimum temperature f.r the GPP of.phytoplankton was 27.9°c, the optimal PNA-unit-chla(photon number absorbed by phytoplankton per chla) was 0.25(mol), and the HScN-unit-chla and HScP-unit-chla(half.saturation constants of.nitrogen and phosphorus of.algae per chla) were 0.005(mg/l) and 0.0004(mg/l), respectively. The seasonal dependency of.the ef.ect of.dif.erent f.ctors on the GPP was analyzed. compared with temperature and nutrients, light was f.und to be the most important f.ctor af.ecting the GPP during the three seasons. The ef.ect of.temperature and nutrients on the GPP of.phytoplankton has obvious seasonal.c.ange. In spring, temperature was the secondary f.ctor af.ecting the GPP of.phytoplankton, and the ef.ect of.nutrients may be negligible in the eutrophic lake on account of.temperature limit, which showed that the GPP of.algae was only af.ected by the physical process. In summer and f.ll, temperature didn't af.ect the GPP of.algae, and the presence of.nutrients was the secondary f.ctor af.ecting the GPP of.phytoplankton. f.om summer to f.ll, ef.ect of.phosphorus was weakened and ef.ect of.nitrogen was enhanced.

关键词： Temperature limited ef.ect Gross primary productivity Eutrophication light limit Optimum temperature Half.saturation constants

Structure and Magnetic Properties of.Magnetostrictive f.Ga f.lm on Single-crystal(100) GaAs and(001) Si Substrate f.bricated by Pulsed laser Deposition

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Acta Metallurgica Sinica(English letters) 2018年第6期31卷 623-628页

作者： Y.Zhang M.Turghun c.J.Huang T.wang f.f.wang W.Z.Shi Key laboratory of.Optoel.c.ronic Material and Device Shanghai Normal University Mathematics and Science college Shanghai Normal University

f.Ga thin f.lm has been deposited on（100）-oriented GaAs and（001）-oriented Si substrates with dif.erent f.lm thicknesses and laser energy densities at room temperature by pulsed laser deposition *** structure and static magnetic of.f.Ga f.lm have great changes depending on the substrate and energy density of.pulsed laser.X-ray dif.raction reveals the presence of.f.rst-order order–disorder structure of.rain phase and disordered bcc A2 structure on GaAs *** coercivity and remanence of.f.Ga f.lm on GaAs substrate ratio show a regular dependence on the thickness and energy ***,f.lm on Si substrate did not exhibit structure change,which can be attributed to a large lattice mismatch between f.Ga and Si.

关键词： Magnetostrictive f.lm Sof. magnetic f.lm Texture Galf.nol

Advances in additively manuf.ctured titanium alloys by powder bed f.sion and directed energy deposition:Microstructure,def.cts,and mechanical behavior

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Journal of.Materials Science & Technology 2024年第16期183卷 32-62页

作者： H.Y.Ma J.c.wang P.Qin Y.J.liu l.Y.chen l.Q.wang l.c.Zhang centre f.r Advanced Materials and Manuf.cturing School of EngineeringEdith Cowan University270 Joondalup DriveJoondalupPerthWA 6027SA School of.Engineering M050The University of Western Australia35 Stirling HighwayCrawleyPerthWA 6009SA Institute of.Metals College of Material Science and EngineeringChangsha University of Science&TechnologyChangsha 410004China School of.Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China State Key laboratory of.Metal Matrix composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Ti and its alloys have been broadly adopted across various industries owing to their outstanding proper-ties,such as high strength-to-weight ratio,excellent f.tigue perf.rmance,exceptional.c.rrosion resistance and so *** manuf.cturing(AM)is a complement to,rather than a repl.c.ment f.r,traditional manuf.cturing *** enhances f.exibility in f.bricating complex components and resolves machin-ing challenges,resulting in reduced lead times f.r custom ***,owing to distinctions among various AM technologies,Ti alloys f.bricated by dif.erent AM methods usually present dif.erences in mi-crostructure and def.cts,which can signif.cantly inf.uence the mechanical perf.rmance of.built ***,having an in-depth knowledge of.the scientif.c aspects of.f.brication and material properties is crucial to achieving high-perf.rmance Ti alloys through dif.erent AM *** article reviews the mechanical properties of.Ti alloys f.bricated by two mainstream powder-type AM techniques:powder bed f.sion(PBf.and directed energy deposition(DED).The review examines several key aspects,en-compassing phase f.rmation,grain size and morphology,and def.cts,and provides an in-depth analysis of.their inf.uence on the mechanical behaviors of.Ti *** review can aid researchers and engi-neers in sel.c.ing appropriate PBf.or DED methods and optimizing their process parameters to f.bricate high-perf.rmance Ti alloys f.r a wide range of.industrial appl.c.tions.

关键词： Powder bed f.sion Directed energy deposition Titanium alloys Phase transf.rmation Def.cts Mechanical property