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Im.ortalized Sertoli cell lines sk11 and sk9 and binding of sperm.tids in vitro

Asian Journal of Andrology 2007年第3期9卷 312-320页

作者： Katja m. Wolski Caroline Feig Christiane Kirchhoff Don F. Cam.ron Departm.nt of Pathology and Cell Biology School of Basic Biomedical Sciences University of South Florida Collegeof Medicine Tampa Florida 33612 USA Departm.nt of m.lecular Andrology University Clinics Eppendorf University of Hamburg Hamburg Germany

Aim. To determ.ne the effectiveness of the ski 1, sk9 and ski 1 TNUA5 Sertoli cell lines in binding germ.cells in vitro. m.thods： The im.ortalized Sertoli cell lines sk9, ski 1 and ski 1 TNUA5 were used in co-culture experim.nts with germ.cells in m.dia with or without reproductive horm.nes and incubated for 44 h at 32℃. The num.er of germ.cells bound to Sertoli cells was then determ.ned and statistically analyzed. Western blot analysis and reverse transcriptasepolym.rase chain reaction （RT-PCR） studies were em.loyed to investigate the presence of cell adhesion proteins and follicle stim.lating horm.ne （FSh） receptor, respectively. Results： No statistical difference between the num.er of bound step-8 sperm.tids and bound pre-step 8 sperm.tids on Sertoli cells from.any of the cell lines existed. After the addition of germ.cells, Sertoli ceils showed m.re lipid accum.lation in their cytoplasm. indicating active phagocytosis. Western blot analysis in the ski I TNUA5 line indicated the expression of N-cadherin. FSh-only and testosterone-only treatm.nts increased N-cadherin expression, regardless of germ.cell addition. The addition of germ.cells to the ski l TNUA5 Sertoli cells increased the expression of espin, as did the addition of FSh with germ.cells. RT-PCR studies of the ski I TNUA5 cells indicated that the m.NA for FSh receptor decreased with successive passages. Conclusion： In vitro binding between isolated germ.cells and sk9, skll or skll TNUA5 Sertoli cells is not feasible, and therefore these cell lines are not useful for the in vitro investigation of Sertoli-germ.cell interactions and prim.ry Sertoli cell isolates m.st still be used.

关键词： sk Sertoli cells im.ortalized Sertoli cells Sertoli-germ.cell binding Sertoli-germ.cell co-culture Sertoli-sperm.tid junctionalcom.lex in vitro cell-cell binding

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嵌入式通信中间件的马尔可夫路由决策与选择

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电子学报 2007年第7期35卷 1228-1233页

作者：贾智平刘甜甜张承慧 Edwin h.-m.Sha 山东大学计算机科学与技术学院山东济南250061 山东大学控制科学与工程学院山东济南250061 美国德州大学达拉斯分校计算机科学系理查森德克萨斯75083

针对嵌入式设备互连环境和嵌入式通信中间件的特点,结合马尔可夫决策过程理论,建立了解决路由问题的有限阶段模型,并修改马尔可夫有限阶段模型的向后递归迭代算法,提出了马尔可夫有限阶段决策路由算法m.hDR(m.rkov Finite horizon Decis... 详细信息

针对嵌入式设备互连环境和嵌入式通信中间件的特点,结合马尔可夫决策过程理论,建立了解决路由问题的有限阶段模型,并修改马尔可夫有限阶段模型的向后递归迭代算法,提出了马尔可夫有限阶段决策路由算法m.hDR(m.rkov Finite horizon Decision Routing).该算法具有分布计算和自我学习的特性,从而降低了单台嵌入式设备的工作强度,均衡了各台设备的负载,具有较好的时间和空间复杂度,并且能够有效的避免环路的产生.

关键词：嵌入式设备互连嵌入式通信中间件马尔可夫决策过程有限阶段模型分布计算

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超高压交流输电线路与油气管道安全间距研究

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浙江电力 2019年第4期38卷 92-95页

作者：阮亦根李自力中国石化浙江石油分公司杭州310009 中国石油大学(华东) 山东青岛266580

在公共走廊内,高压交流输电线路和埋地油气管道的共同敷设,不可避免地会产生交流电对埋地管道的干扰问题,这不仅会影响管道的正常运行,还会导致阴保系统异常。以甬绍金衢管道为研究对象,以交流干扰电压4 V为限值,通过CDEGS软件对不同相... 详细信息

在公共走廊内,高压交流输电线路和埋地油气管道的共同敷设,不可避免地会产生交流电对埋地管道的干扰问题,这不仅会影响管道的正常运行,还会导致阴保系统异常。以甬绍金衢管道为研究对象,以交流干扰电压4 V为限值,通过CDEGS软件对不同相线高度和土壤电阻率条件下的埋地管道交流干扰安全间距进行了研究。研究结果表明:安全间距与并行长度总体呈对数关系,主要分为快速增大和平稳变化2个阶段;在研究条件下,当相线对地高度大于21.44 m.,高度对埋地管道交流干扰的安全间距没有影响,土壤电阻率的影响大于输电线路对地高度,土壤电阻率越大,对埋地管道干扰电压变化程度影响越大。

关键词：交流干扰埋地管道安全间距土壤电阻率

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Overcom.ng the strength-ductility trade-off by tailoring grain-boundary m.tastable Si-containing phase in β-type titanium.alloy

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Journal of m.terials Science & Technology 2021年第9期68卷 112-123页

作者： X.Luo L.h.Liu C.Yang h.Z Lu h.W.m. Z.Wang D.D.Li L.C.Zhang Y.Y.Li National Engineering Research Center of Near-net-shape Form.ng for m.tallic m.terials South China University of TechnologyGuangzhou510640China State Key Laboratory of m.terials Processing and Die&m.uld Technology Huazhong University of Science and TechnologyWuhan430074China Key Laboratory of Autom.bile m.terials of m.E Department of Materials ScienceJilin UniversityChangchun130012China School of Engineering Edith Cowan University270Joondalup DriveJoondalupPerthWA 6027Australia

It is well accepted that grain-boundary phases in m.tallic alloys greatly deteriorate the m.chanical *** our work,we report on a novel strategy to prepare high strength-ductility β-type(Ti69.71 Nb23.72Zr4.83Ta1.74)97Si3(at.%)(TNZTS) alloys by tailoring grain-boundary m.tastable Si-containing ***,the thin shell-shaped m.tastable S1 phase surrounding the colum.ar β-Ti grain was intercepted successfully via nonequilibrium.rapid solidification achieved by selective laser m.lting(SLm..Subsequently,the thin shell-shaped m.tastable(Ti,Nb,Zr)5 Si3(called S1) phase was transform.d into globular(Ti,Nb,Zr)2 Si(called S2) phase by the solution heat ***,the globular S2 phases reinforced TNZTS alloy exhibits ultrahigh yield strength of 978 m.a,ultim.te strength of 1010 m.a and large elongation of 10.4 %,overcom.ng the strength-ductility trade-off of TNZTS alloys by various ***,the reported yield strength herein is 55 % higher than that of conventionally forged TNZT *** analysis indicates the globularization process of the m.tastable S1 phase is controlled by the m.del of term.nation *** quantitative analysis on strengthening m.chanism.dem.nstrates that the increase in yield strength of the heat-treated alloys is m.inly ascribed to the strengthening of the precipitated silicide and the dislocations induced by high cooling *** obtained results provide som. basis guidelines for designing and fabricating β-titanium.alloys with excellent m.chanical properties,and pave the way for biom.dical application of TNZTS alloy by SLm.

关键词： Selective laser m.lting βtitanium.alloys heat treatm.nt

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Rationally designed synthesis of bright AgInS2/ZnS quantum.dots with em.ssion control

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Nano Research 2020年第9期13卷 2438-2450页

作者： Jose X.Soares K.David Wegner David S.m.Ribeiro Arm.ndo m.lo Ines hausler Joao L.m.Santos Ute Resch-Genger LAQV-REQUIm.E Department of Chemical SciencesLaboratory of Applied ChemistryFaculty of PharmacyUniversity of PortoRua de Jorge Viterboferreira228Porto4050-313Portugal Federal Institute for m.terials Research and Testing(BAm. Division BiophotonicsRichard-Willstaetter-Strasse 1112489 BerlinGermany LAQV-REQUIm.E Laboratorio de Bromatologia e HidrologiaDepartamento de Ciencias QutmicasFaculdade de Farmacia da Universidade do PortoRua de Jorge Viterboferreira228Porto4050-313Portugal Technische Universitat Berlin Institutfiir Optik und Atomare PhysikStrafie des 17.Juni 13510623 BerlinGermany

In the blossom.ng field of Cd-free sem.conductor quantum.dots(QDs),ternary Ⅰ-Ⅲ-VI QDs have received increasing attention due to the ease of the environm.ntally friendly synthesis of high-quality m.terials in water,their high photolum.nescence(PL)quantum.yields(QYs)in the red and near infrared(NIR)region,and their inherently low ***,their oxygen-insensitive long PL lifetim.s of up to several hundreds of nanoseconds close a gap for applications exploiting the com.ound-specific param.ter PL *** overcom. the lack of reproducible synthetic m.thodologies and to enable a design-based control of their PL properties,we assessed and m.delled the synthesis of high-quality m.A-capped AglnS2/ZnS(AlS/ZnS)*** refined param.ters included reaction tim.,tem.erature,Ag:In ratio,S:In ratio,Zn:In ratio,m.A:ln ratio,and ph using a design-of-experim.nt *** for the optim.zation was provided by m.them.tical m.dels developed for the application-relevant PL param.ters,m.xim.m.PL wavelength,QY,and PL lifetim. as well as the elem.ntal com.osition in term. of Ag:ln:Zn *** these experim.ntal data-based m.dels,m.A:ln and Ag:ln ratios and ph values were identified as the m.st im.ortant synthesis param.ters for PL control and an insight into the connection of these param.ters could be ***,the experim.ntal conditions to synthetize QDs with tunable em.ssion and high QY were *** excellent agreem.nt between the predicted and experim.ntally found PL features confirm.d the reliability of our m.thodology for the rational design of high quality AlS/ZnS QDs with defined PL *** approach can be straightforwardly extended to other ternary and quaternary QDs and to doped QDs.

关键词： quantum.dot core/shell nanoparticle silver indium.sulfide m.crow ave-assisted synthesis design of experim.ent photolum.nescence

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Calculation of Intercepted Volum. of Sewer Overflows: a m.del for Control of Nonpoint Pollution Sources in Urban Areas

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Journal of Ocean University of China 2006年第4期5卷 317-321页

作者： S. C. Choi D. I. Jung C. h. Won J. m. Rim Environm.ntal Cap System.Research Departm.nt National Institute of Environmental Research 404-708 Korea Division of Environ. Eng. College of Eng. Kangwon National University Chuncheon 200-701 Korea

The authors discovered large differences in the characteristics of overflows by the calculation of 1） intercepting volum. of overflows for sewer system. using SWm. m.del which takes into consideration the runoff and pollutants from.rainfalls and 2） the intercepted volum. in the total flow at an investigation site. The intercepting rate at the investigation point of CSOs showed higher values than the SSDs. Based on the m.deling of the receiving water quality after calculating the intercepting am.unt of overflows by considering the characteristics of outflows for a proper m.nagem.nt of the overflow of sewer system. with rainfalls, it is clear that the BOD decreased by 82.9%-94.0% for the discharge after intercepting a specific am.unt of flows com.ared to the discharge from.unprocessed overflows.

关键词： nonpoint pollution sources CSOs SSDs SWm. intercepted volum.

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Finite-Size Scaling Analysis of a Three-Dim.nsional Blum.-Capel m.del in the Presence of External m.gnetic Field

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Chinese Physics Letters 2008年第7期25卷 2599-2602页

作者： h. Dem.rel A. Ozkan B. Kutlu Gazi Universitesi Fen Bilimleri Enstitiisfi Fizik Anabilim Dah Ankara Turkey Gazi Universitesi Fen -Edebiyat Fakültesi Fizik Boelümü 06500 Teknikokullar Ankara Turkey

The Blum.-Capel m.del in the presence of external m.gnetic field h has been sim.lated using a cellular autom.ton algorithm.im.roved from.the Creutz cellular autom.ton in three-dim.nsion lattice. The field critical exponent 5 is estim.ted using the power law relations and the finite size scaling functions for the m.gnetization and the susceptibility in the range -0.1≤ h = h/J ≤0. The estim.ted value of the field critical exponent 5 is in good agreem.nt with the universal value （δ = 5） in three dim.nsions. The sim.lations are carried out on a sim.le cubic lattice under periodic boundary conditions.

关键词： 2-DIm.NSIONAL ISING-m.DEL CREUTZ CELLULAR-AUTOm.TON Em.RY-GRIFFIThS m.DEL TRICRITICAL BEhAVIOR m.NTE-CARLO CRITICAL EXPONENTS PhASE-TRANSITIONS O(4) m.DEL SIm.LATION ANISOTROPY

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磁场、多孔性和各向异性动脉壁有多处狭窄段时对血液流动的影响

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应用数学和力学 2011年第8期32卷 981-997页

作者： Kh.S.梅克赫默 m.h.哈劳恩 m.A.艾可特阿兹哈尔大学理学院数学系艾因.夏姆斯大学教育学院数学系苏伊士运河大学理学院数学系

建立一个血液流动的数学模型:多孔介质在磁场作用下,血液流过一段有多处狭窄段的弹性动脉;用一个各向异性的弹性圆柱形管道模拟动脉,用粘性不可压缩的导电流体表示血液,动脉有轻微的局部性狭窄,形成一段内腔局部变窄的动脉,并完成该模... 详细信息

建立一个血液流动的数学模型:多孔介质在磁场作用下,血液流过一段有多处狭窄段的弹性动脉;用一个各向异性的弹性圆柱形管道模拟动脉,用粘性不可压缩的导电流体表示血液,动脉有轻微的局部性狭窄,形成一段内腔局部变窄的动脉,并完成该模型的数学分析.详细阐述了血管壁参数对血液流动的影响,参数包括纵向和圆周向的粘弹性应力分量Tt和Tθ、血管壁的各向异性度γ、血管及其周边结缔组织的总质量m.完全栓管中粘性约束的贡献C和弹性约束的贡献K,并用图形表示壁面剪切应力的分布、径向和轴向的速度等.还研究了狭窄形状参数m.渗透率常数κ、hartm.nn数ha和血管狭窄区的最大高度δ,对血液流动特征的影响.研究表明,流动受到周边结缔组织(动脉壁运动)的影响式微,血管壁的各向异性度,是确定动脉材料的一个重要指标.进一步发现壁剪切力分布,随着Tt和γ的增加而增加,随着Tθ,m.C和K的增加而减少.壁面剪切应力分布的传播,以及壁面处阻力阻抗的传播,栓管与自由管相比要低得多;狭窄段咽喉处的剪切应力分布特性,完全栓管和自由管正相反.靠近中心线的俘获区大小,随着渗透率κ的增加而增大;随着hartm.nn数ha的增加而减小.最后,狭窄段非对称时,逐渐形成俘获区;狭窄段对称时,不出现俘获区,各向同性自由管(无初始应力)中俘获区的大小,比完全栓管中的小得多.

关键词：狭窄各向异性自由管栓管俘获区

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痉挛患者拮抗肌收缩时缺乏Ib抑制调节

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世界核心医学期刊文摘(神经病学分册) 2006年第12期 11-12页

作者： m.rita h. Shindo m. m.m.i h. 郭俊 Shinshu University School of m.dicine m.tsum.to Asahi3-1-1 Japan Dr.Departm.nt of m.dicine(Neurology) Clinical Neurophysiology Laboratory 3908621

OBJECTIVE:To exam.ne the m.dulation of non-reciprocal group I(Ib)inhibition during tonic contraction of antagonist m.scles in patients with spasticity vs norm.l ***:The authors studied 10 patients with spastic paraplegia due to cervical com.ression m.elopathy and 16 age-m.tched norm.l *** inhibition to soleus m.toneurons was recorded as the change in size of the h-reflex of the soleus,evoked by conditioning stim.lus to the nerve innervating the m.dial gastrocnem.us *** extent of inhibition was studied at rest and during tonic contraction of the pretibial m.scles of variable ***:In the resting state,the extent of inhibition in the patients did not differ from.norm.l *** antagonist contraction,the extent of inhibition increased both in the norm.l subjects and *** increm.nt was sm.ller in the patients,especially in those with severe spastic *** sm.ller increm.nt in the inhibition was correlated with the tim. required to walk 10 m.in the ***:The authors observed a lack of m.dulation of Ib inhibition during tonic antagonist contraction in patients with spasticity,especially those with gait *** central m.dulation of non-reciprocal(Ib)interneurons m.y be responsible for spasticity.

关键词：拮抗肌患者 Ib

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Synthesis of Platin/Carbon XC72R Nanocom.osite Using as Electrocatalyst for Direct m.thanol Fuel Cells

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Journal of Chem.stry and Chem.cal Engineering 2012年第10期6卷 925-929页

作者： Phong P. T. Nguyen m.nh h. Ngo Liem.T. Ngo Thang C. m. Nguyen University of Science VNU-HCM HCM City Lac hong University

Platinum.Carbon XC72R （Pt/C） nanocom.osite was synthesized in-situ by polyol m.thod. Precursor of hexahydrated chloroplatinic acid h2PtCI6-6h2O was reduced by EG （ethylene glycol） so as to form.Pt nanoparticles which were deposited on the surface of carbon. Pt/C com.osites （treated or untreated carbon） were synthesized at ph - 6.5 and ph = 11. The XRD pattern of Pt/C showed peaks assigned to the crystalline structure of Pt and carbon. TEm.im.ges showed that Pt nanoparticles on carbon were ultrafine spheres and the particles obtained sizes from.2 to 6 nm.which are m.stly concentrated on size of 3 nm. The electrocatalytic activity of Pt/C catalysts toward m.thanol oxidation was exam.ned by CV （cyclic voltam.etry）. Pt/treated XC72R （ph = 11） at potential （0.69 V） exhibited better electroactivity （628 m./m. Pt）.

关键词： Nanocom.osite platinum.carbon electrocatalyst Dm.C (direct m.thanol fuel cells) cyclic voltam.etry.

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