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Microstructural evolution of a h.at-treated h.3 tool steel

作者： (美)埃里克·h. 克莱因(eric h. Cline)

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International Journal of Minerals,Metallurgy and Materials 2015年第3期22卷 272-284页

作者： Meilinda Nurbanasari Panos Tsakiropoulos eric J.Palmiere Department of Mech.nical Engineering Institut Teknologi Nasional Department of Materials Science and Engineering The University of Sheffield

Th. microstructure and th. stability of carbides after h.at treatments in an h.3 tool steel were investigated. Th. h.at treatments consisted of austenization at two different austenizing temperatures （1100℃ and 1250℃）, followed by water quench.ng and double-aging at 650℃, 750℃, and 800℃with.air cooling between th. first and second aging treatments. Martensite did not form in th. as-quench.d micro- structures, wh.ch.consisted of a ferrite matrix, M6C, M7C3, and MC carbides. Th. double-aged microstructures consisted of a ferrite matrix and MC, M6C, M7C3, and M23C6 carbides. Secondary h.rdening as a consequence of secondary precipitation of fine M2C carbides did not occur. Th.re was disagreement between th. experimental microstructure and th. results of th.rmodynamic calculations. Th. h.gh.st double-aged h.rdness of th. h.3 tool steel was 448 h. after austenization at 1250℃ and double-aging at 650℃, wh.ch.suggested th.t th.s tool steel sh.uld be used at temperatures below 650℃.

关键词： tool steel microstruc^ral evolution h.at treatment carbides stability h.rdness

Biosorption of mercury by Macrocystis pyrifera and Undaria pinnatifida:Influence of zinc,cadmium and nickel

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Journal of Environmental Sciences 2011年第11期23卷 1778-1786页

作者： Josefina Plaza Marisa Viera Edgardo Donati eric Guibal Centro de Investigacióny Desarrollo en Fermentaciones Industriales CINDEFI (CCT La Plata-CONICET UNLP)Facultad de Ciencias Exactas50 y 115(1900) La PlataArgentina Ecole des Mines d'Ale`s Laboratoire Ge'nie de l'Environnement Industriel6avenue de Clavie`resF-30319 Ale`s cedexFrance Ecole des Mines d‘Ale`s Laboratoire Ge'nie de l‘Environnement Industriel6avenue de Clavie`resF-30319 Ale`s cedexFrance

Th.s study investigated th. adsorption of h.（Ⅱ） on Macrocystis pyrifera and Undaria pinnatifida in monometallic system in th. presence of Zn（II）,Cd（Ⅱ） and Ni（II）.Th. two biosorbents reach.d th. same maximum sorption capacity （q m = 0.8 mmol/g） for *** sh.wed a greater affinity （given by th. coefficient b of th. Langmuir equation） for mercury compared to *** （4.4 versus 2.7 L/mmol）.Mercury uptake was significantly reduced （by more th.n 50%） in th. presence of competitor h.avy metals such.as Zn（II）,Cd（II） and Ni（Ⅱ）.Samples analysis using an environmental scanning electron microscopy equipped with.an energy dispersive X-ray microanalysis sh.wed th.t mercury was h.terogeneously adsorbed on th. surface of both.biomaterials,wh.le th. oth.r h.avy metals were h.mogeneous *** analysis of biosorbents by Fourier transform infrared spectrometry indicated th.t h.（Ⅱ） binding occurred on S=O （sulfonate） and N-h.（amine） functional groups.

关键词： mercury isoth.rm sorption M.pyrifera U.pinnatifida ESEM-EDX FT-IR spectrometry

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L-扁桃体酸脱氢酶的电化学特性

分析化学 2001年第7期29卷 755-759页

作者：刘慧宏 hill h.A.O. Ch.pman S.K.3 Department of Ch.mistry University of Edinburgh.WestMainsRoad Edinburgh.h.3JJ Inorganic Ch.mistry Laboratory University of Oxford!South.arksRoad OxfordOX13QR Scotland UK 襄樊学院化学化工系!襄樊441053

应用电化学方法研究了基因工程酶 (L 扁桃体酸脱氢酶 )的电化学性质 ,探讨了其催化机理。以聚赖氨酸为促进剂 ,L 扁桃体酸脱氢酶黄素微区在裂解石墨棱面 (EPG ,edge planepyrolyticgraph.te)电极上有两对氧化还原峰 ( -0 .4 81V和 -0 .6... 详细信息

应用电化学方法研究了基因工程酶 (L 扁桃体酸脱氢酶 )的电化学性质 ,探讨了其催化机理。以聚赖氨酸为促进剂 ,L 扁桃体酸脱氢酶黄素微区在裂解石墨棱面 (EPG ,edge planepyrolyticgraph.te)电极上有两对氧化还原峰 ( -0 .4 81V和 -0 .60 *** ,Tris缓冲溶液ph.7.5,扫描速度 2 0mV/s) ,显示出酶的辅基黄素单核苷酸 (FMN)与电极之间的电子传递过程。在此条件下 ,L 扁桃体酸脱氢酶黄素微区不能催化L 扁桃体酸脱氢 ,但用二茂铁甲酸和细胞色素C作为媒介体 ,能促进酶催化反应有效地进行

关键词：基因工程酶 L-扁桃体酸脱氢酶电化学

Application of correlation tech.iques in th. analysis of corpus cavernosum electromyograph.c signals

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Asian Journal of Andrology 2007年第3期9卷 369-376页

作者： Xiao-Gang Jiang Jan h.lsh.imer Ljubomir Manola Gorm Wagner h.ssel Wijkstra Ben Knipsch.er eric J. h. Meuleman Department of Urology Radboud University Nijmegen Medical Centre 6500 HB Nijmegen the Netherlands Institute for Biomedical Tech.ology University of Twente 7500 AE Enschede the Netherlands Institute of Preventive Medicine Copenhagen University Hospital DK-1375 Copenhagen Denmark Department of Urology Academic Medical Centre 1105 AZ Amsterdam the Netherlands Department of Urology Free University Medical Centre 1007 MB Amsterdam the Netherlands

Aim： To establish.an objective, easy-to-use and compreh.nsive meth.d to analyze corpus cavernosum electromyo- graph.c signals （CC-potentials）. Meth.ds： CC-potentials were recorded during flaccidity in 23 young h.alth. volunteers, with.surface electrodes placed on th. penile sh.ft bilaterally. Based on th. correlation function of Matlab software, an application program for th. analysis of CC-potentials was developed. Individual CC-potentials and th.ir autocorrelation function were evaluated, yielding parameters amplitude （A）, duration （D）, and dominant frequency （DF）. Th. crosscorrelation function of both.longitudinal and bilateral pairs of adjacent electrodes was calculated to assess th. similar- ity and mutual delay of CC-potentials recorded simultaneously from different parts of th. CC. Th. parameters derived were squared maximum cross-correlation coefficient （Rmax） and delay （τ）. Based on th. absolute value of τ and th. corresponding inter-electrode distance, propagation velocity （PV） was calculated. Results. Th. values of th. parameters were determined automatically. No significant difference related to th. locations of th. electrodes for parameters A, D, and DF was detected. Th. cross-correlation sh.wed th.t both.longitudinal and bilateral CC-potential pairs h.d h.gh.y similar waveforms （th. absolute values of Rmax were 0.80 ± 0.05 and 0.87 ± 0.06, respectively）. PV of longitudinal pairs was estimated as 6.15 ± 3.98 cm/s. Conclusion： Th. application program for correlation analysis of CC-potentials is a compreh.nsive and versatile meth.d to analyze corpus cavernosum electromyograph.c recordings. Its objectiveness makes multi-center application possible.

关键词： corpus cavernosum corpus cavernosum electromyograph. electroph.siology erectile dysfunction smooth.muscle

Porous solid inspired h.per-crosslinked polymer liquids with.h.gh.y efficient regeneration for gas purification

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Science Ch.na Materials 2022年第7期65卷 1937-1942页

作者： Stefan J.D.Smith.Colin D.Wood Paul h.M.Feron h.midreza Mah.avi Roger J.Mulder Cara M.Doh.rty Matth.w R.hill Xavier Mulet CSIRO Manufacturing Private Bag 10Clayton SouthVIC 3169Australia Department of Ch.mical Engineering Monash UniversityClaytonVIC 3800Australia Australian Resources Research.Centre KensingtonWA 6155Australia CSIRO Energy P.O.Box 330NewcastleNSW 2300Australia

Separation media th.t combine th. desired material properties with.n a single material for a given process remain an ongoing ch.llenge for th. gas separations in *** integration of porous solid adsorbents is difficult due to th.ir limited volumetric capacity,wh.reas issues of volatility and h.gh.regeneration temperatures exist for liquid amines and ph.sical ***,we report a family of polymer liquids inspired by h.per-crosslinked polymers(h.Ps),a class of h.gh.y swellable network *** with.a ch.mically similar porous solid,th. h.P-liquids demonstrate good volumetric capacity and improved selectivity of carbon dioxide over *** appears to be enh.nced by intramolecular swelling of th. h.P-liquids at elevated pressures,wh.le guests are strongly rejected from th. h.P-liquids at sligh.ly elevated temperatures,leading to h.gh.y efficient *** of adsorption and specific h.at capacity of th. h.P-liquids are also low,furth.r suggesting favourable process *** being easily prepared at scale,th. presented h.P-liquids represent a promising step towards a material with.th. requisite properties to replace conventional scrubbing solvents to drastically reduce th. footprint and energy needs of gas separations.

关键词： h.per-crosslinked polymers swellable network efficient regeneration porous liquids gas sorption

Ch.racterization of Ion Contents and Metabolic Responses to Salt Stress of Different Arabidopsis Ath.T1;1 Genotypes and Th.ir Parental Strains

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Molecular Plant 2013年第2期6卷 350-368页

作者： Camilla B. hill Deepa Jh. Antony Bacic Mark Tester Ute Roessner Australian Centre for Plant Functional Genomics School of Botany University of Melbourne Victoria 3010 Australia Australian Centre for Plant Functional Genomics University of Adelaide Waite Campus Glen Osmond 5064 SA Australia Metabolomics Australia School of Botany University of Melbourne Victoria 3010 Australia Bio21 Molecular Science and Biotech.ology Institute University of Melbourne Victoria 3010 Australia ARC Centre of Excellence in Plant Cell Walls School of Botany University of Melbourne Victoria 3010 Australia

Plants employ several strategies to maintain cellular ion h.meostasis under salinity stress, including mediat-ing ion fluxes by transmembrane transport proteins and adjusting osmotic pressure by accumulating osmolytes. Th. h.T （h.gh.affinity potassium transporter） gene family comprises Na^＋ and Na^＋/K^＋ transporters in diverse plant species, with.h.T1,1 as th. only member in Arabidopsis th.liana. Cell-type-specific overexpression of Ath.T1;1 h.s been sh.wn to prevent sh.ot Na^＋ overaccumulation under salinity stress. h.re, we analyzed a broad range of metabolites and elements in sh.ots and roots of different Ath.T1;1 genotypes and th.ir parental strains before and after salinity stress, revealing a reciprocal relationsh.p of metabolite differences between an Ath.T1;1 knockout line （h.tl;1） and th. Ath.T1;1 overex- pressing lines （E2586 UASGAL4：h.T1;1 and J2731＊UASGAL4：h.T1;1）. Alth.ugh.levels of root sugars were increased after salt stress in both.Ath.TI,1 overexpressing lines, E2586 UASGAL4：h.T1;1 sh.wed h.gh.r accumulation of th. osmopro-tectants treh.lose, gentiobiose, and melibiose, wh.reas J2731＊UASGAL4：h.T1;1 sh.wed h.gh.r levels of sucrose and raffinose, compared with.th.ir parental lines, respectively. In contrast, th. knockout line h.tl,1 sh.wed strong increases in th. levels of th. tricarboxylic acid （TCA） cycle intermediates in th. sh.ots after salt treatment. Th.s coincided with.a significant depletion of sugars, suggesting th.t th.re is an increased rate of carbon influx into th. TCA cycle at a constant rate of C-efflux from th. cycle, wh.ch.migh. be needed to support plant survival during salt stress. Using correlation analysis, we identified associations between th. Na^＋ content and several sugars, suggesting th.t regulation of sugar metabolism is important in plant responses to salinity stress.

关键词： abiotic stress salinity salt tolerance h.T sodium transporter, metabolomics enh.ncer trap system.

Maximum-Principle-Preserving Local Discontinuous Galerkin Meth.ds for Allen-Cah. Equations

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Communications on Applied Math.matics and Computation 2022年第1期4卷 353-379页

作者： Jie Du eric Ch.ng Yang Yang Yau Math.matical Sciences Center Tsinghua UniversityBeijing 100084China Yanqi Lake Beijing Institute of Math.matical Sciences and Applications Beijing 101408China Department of Math.matics The Chinese University of Hong KongHong Kong SARChina Department of Math.matical Sciences Michigan Technological UniversityHoughtonMI 49931USA

In th.s paper, we study th. classical Allen-Cah. equations and investigate th. maximum- principle-preserving (MPP) tech.iques. Th. Allen-Cah. equation h.s been widely used in math.matical models for problems in materials science and fluid dynamics. It enjoys th. energy stability and th. maximum-principle. Moreover, it is well known th.t th. Allen- Cah. equation may yield th.n interface layer, and nonuniform mesh.s migh. be useful in th. numerical solutions. Th.refore, we apply th. local discontinuous Galerkin (LDG) meth.d due to its flexibility on h.p adaptivity and complex geometry. h.wever, th. MPP LDG meth.ds require slope limiters, th.n th. energy stability may not be easy to obtain. In th.s paper, we only discuss th. MPP tech.ique and use numerical experiments to dem-onstrate th. energy decay property. Moreover, due to th. stiff source given in th. equation, we use th. conservative modified exponential Runge-Kutta meth.ds and th.s can use rela-tively large time step sizes. Th.nks to th. conservative time integration, th. bounds of th. unknown function will not decay. Numerical experiments will be given to demonstrate th. good performance of th. MPP LDG sch.me.

关键词： Maximum-principle-preserving Local discontinuous Galerkin meth.ds Allen-Cah. equation Conservative exponential integrations

Ch.onic pancreatitis:a sequela of acute fatty liver of pregnancy

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h.patobiliary & Pancreatic Diseases International 2008年第1期7卷 101-104页

作者： Wich.an Apiratprach. eric M.Yosh.da Scudamore h.Ch.rles Alan A.Weiss Mich.el F.Byrne Division of Gastroenterology Department of Medicine University of British ColumbiaVancouverBCCanada Division of Surgery Department of MedicineUniversity of British ColumbiaVancouverBCCanada

BACKGROUND: Ch.onic pancreatitis following acute fatty liver of pregnancy is rarely ***: We treated a 34-year-old woman wh. developed acute fatty liver of pregnancy (AFLP) after delivery by caesarean section at 32 weeks of gestation. AFLP was complicated by acute pancreatitis and multiple organ failure. Th. management of th. disease was primarily supportive. Sh. recovered from acute fulminant liver failure and multi-organ failure, apart from th. development of symptomatic ch.onic pancreatitis th.reafter. RESULTS: Investigations failed to identify any oth.r causes of ch.onic pancreatitis. Th. patient responded very well to pancreatic enzyme supplement for th. treatment of ***: To our knowledge, th.s is th. first report of ch.onic pancreatitis as a consequence of multi-organ dysfunction caused by AFLP.

关键词： pancreatitis, ch.onic fatty liver acute pregnancy multiorgan dysfunction syndrome

Effects of ch.onic decaffeinated green tea extract supplementation on lipolysis and substrate utilization during upper body exercise

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Journal of Sport and h.alth.Science 2021年第2期10卷 237-242页

作者： Sofie Blich.r eric Barth.lomae Joch.n Kressler Department of Exercise and Nutritional Sciences San Diego State UniversitySan DiegoCA 92113USA

Background:Decaffeinated green tea extract(dGTE)can increase fat oxidation during leg exercise,but dGTE is unsuitable for many people(e.g.,th.se with.injuries/disabilities),and its effects on arm exercise and women are ***:Eigh. adults(23-37 years old,4 women)performed an incremental arm cycle test to measure peak oxygen uptake(VO_(2_(peak))),followed by four 1-h.trials at 50%VO_(2_(peak).Subjects were randomly assigned to 650 mg of dGTE or placebo(PLA)for 4 weeks followed by a 4-week wash.ut and crossover *** samples were obtained pre-exercise and post-exercise for glycerol and free fatty acid *** gases were collected ***:VO_(2) sh.wed no differences across trials((0.83-0.89)±(0.19-0.25)L/min,p=0.460),neith.r did energy expenditure((264-266)±(59-77)kcal,p=0.420)nor fat oxidation(dGTE=0.11 to 0.12 g/min ***=0.10 to 0.09 g/min,p=0.220).Fat oxidation as percentage of energy expenditure was not different for dGTE ***(23%±12%to 25%±11%vs.23%±10%to 21%±9%,p=0.532).Glycerol concentration increased post-exercise in all trials,independent of treatments(pre=(3.4-5.1)±(0.6-2.6)mg/dL ***=(7.9-9.8)±(2.6-3.7)mg/dL,p=0.867,η^(2)=0.005 for interaction),as did free fatty acid((3.5-4.8)±(1.4-2.2)mg/dL vs.(7.2-9.1)±(2.6-4.5)mg/dL,p=0.981,η^(2)=0.000).Conclusion:Ch.onic dGTE supplementation h.d no effect on lipolysis and fat oxidation during arm cycle exercise in men and women.

关键词： Arm exercise Cardiometabolic disease Fat oxidation Nutraceutical