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| 1 | Characterization of surface liquid segregation in SSM-HPDC aluminium alloys 7075,2024,6082 and A201显示文摘The surface liquid segregation(SLS) phenomenon in semi-solid metal-high pressure die casting(SSM-HPDC) plates of 7075,2024,6082 and A201 was investigated by different techniques.Depth profiles were determined by firstly measuring the chemical composition of the surface of the plates using a Thermo Quantris optical emission spectrometer(OES).Material was then removed by a grinding process followed by measurement of the amount of material removed and chemical analysis.Chemical profiles of the main alloying elements were plotted for the cross-section of the plates in the as-cast and T6(after solution treatment) temper conditions.Vickers hardness profiles from the surface to the centre of the plates were determined.Metallographic samples of cross-sections of the castings were prepared and evaluated using a scanning electron microscope.The results show that surface liquid segregation in SSM-HPDC alloys causes significant differences in properties between the surface and the bulk of these castings in both the F and T6 temper conditions. | H.MLLER U.A.CURLE E.P.MASUKU | 2010 | 中国有色金属学会会刊:英文版2010，20，S3： | 6 |
| 2 | 钒和磷在土壤中的竞争吸附与迁移特性研究显示文摘应用批培养法和土柱法分别研究了钒和磷在两种美国耕地土壤(Sharkey重粘土和Cecil壤沙土)中的竞争吸附与迁移特征。结果表明,Sharkey重粘土对V表现出非常强的吸持能力,快速的吸持反应表现出了近似于平衡吸附的特征。加P对Sharkey土壤吸持V的能力没有明显的影响。Cecil壤沙土对V的吸附表现为快速的平衡吸附,不过其吸持能力要明显地小于Sharkey重粘土,而且,在前期被Cecil吸持的V会随培养时间的延长而部分被解吸出来。Sharkey对P的吸持能力略小于对V的吸持能力,且动态吸附特性比较明显。Cecil对P的吸附能力非常弱,V在Cecil沙壤土中的竞争吸附能力大于P。Cecil壤沙土对P和V,尤其是对V的吸持具有动态吸附的特征。 | 王凯荣 H.M Selim 朱端卫 | 2003 | 农业环境科学学报2003，22，5： | 5 |
| 3 | 雷公藤免疫调节的体外研究显示文摘目的证实雷公藤能否选择性地抑制LPS、PHA诱导的TNFα、IFNγ的产生,以及它抑制TNFα的免疫学机理。方法采用健康供血者外周血单个核细胞(PBMC)的体外培养及ELISA,测量雷公藤甲素抑制由LPS、PHA诱导的TNFα、IFNγ的能力;通过对PBMC和单核细胞(monocyte)的预处理试验,以及其后的流式细胞仪分析,研究雷公藤抑制TNFα的免疫学机理。结果雷公藤对TNFα、IFNγ的抑制具有剂量依赖性,对TNFα的IC50为5~10ngml,对IFNγ的IC50为0.1~1.0ngml。PBMC和monocytes试验中,雷公藤的不同预处理后的TNFα浓度,与流式细胞分析产生效应的CD14+TNFα+细胞数一致。结论两种预处理方法提示了不同的临床意义。免疫表现型的分析揭示,雷公藤可能与LPS竞争结合CD14受体。该研究为雷公藤可作为抗炎剂治疗麻风反应提供了基本依据。 | 翁小满 Atkinson S Gorak-Stolinska P Dockrell H.M | 2004 | 中华微生物学和免疫学杂志2004，24，12： | 4 |
| 4 | Wireless and batteryless SAW sensors,a promising solution for harsh environments显示文摘In this paper,general principle of the Surface Acoustic Wave(SAW) sensor in wired and wireless con-figurations will be developed and a review of recent works concerning the field of high temperature applications will be presented.The first part will be devoted to aspects of data transmission and processing.Both configurations of SAW de-vice,delay line and resonator,will be discussed as well as the remote interrogation techniques used to collect and to proc-ess signal.The second part will be devoted to the material aspects.Indeed,knowing that the conventional piezoelectric substrates such as quartz or lithium niobate cannot be used at high temperature,the choice of the material constituting the SAW device(substrate & electrodes) is one of the challenges to face.We will focus our discussion on the Langasite,the current reference for high temperature applications,and on the AlN/Sapphire structure,the very promising alternative for application where the use of high frequency is required. | H.M'Jahed T.Aubert G.Prieur O.Elmazria | 2011 | 电子测量与仪器学报2011，25，7： | 4 |
| 5 | INVESTIGATION OF SURFACE MORPHOLOGY, STRUCTURE AND ELECTROCATALYTIC PROPERTIES FOR O_2 EVOLUTION OF TITANIUM BASED IrO_2+Ta_2O_5 COATINGS显示文摘Titanium based IrO2 +Ta2O5 oxide anodes with different compositions and pyrolysis temperatures were prepared by termodecompoisition method. By using X-ray diffraction (XRD), the structure and texture coefficient of the coatings, TC(hkl), of IrO2 rutile crystal have been tested. It showed that, the crystallization processes of IrO2 and Ta2O5 in xIrO2 +(100-x) Ta2 O5 (x is in mol%) films affected and confined each other.In the mixed system, IrO2 rutile phase existed as a solid solution with Ta, and attained the maximum solubility when x=70mol%, i.e. for the coating of 70% IrO2 +Ta2O5.For the coatings of low iridium content or at low preparing tem pemture, (110) and (101) pwtered orientations were dominant. However, preferred growth of IrO2 weakened with increasing either iridium content or temperature. Three typical surface morphologies were observed by using scanning electron tnicroscopy(SEM). The crystallite size of the mixed oxide coatings were finest for the the film of 70%IrO2 +30%Ta2O5,and decreased with the pyrolysis tempemture. As the results of the finest crystallite segregating on sudece and the maxitnum solid solubility of Ir and Ta component in deposits, the coatings with the composition of 70%IrO2 +Ta2O5 prepared at 450℃ presented the mdrimutn electrocatalgtic activitg for O2 evolution in 0. 5M H2SO4 solution.UP to 550℃, Ti base suffered to oxidation resulting in decreasing anode conductivity,therefore, coatings performed a low activity. | J.M Hu J.X. Wu H.M Meng YR. Zhu D.B. Sun and D.J. Yang(Beijing Corrosion and Protection Center, Open Laboratory of Corrosion, Erosion and Surface Technology,University of Science and Technology Beijing, Beijing 100083, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，3： | 3 |
| 6 | Application of shortened heat treatment cycles on A356 automotive brake calipers with respective globular and dendritic microstructures显示文摘Since the automotive industry has many possible applications for semi-solid metal (SSM)-high-pressure die casting (HPDC) parts, the newly developed heat treatment cycles, as well as the traditional heat treatment cycles, were applied to A356 brake calipers cast using a LK DCC630 HPDC machine.Vickers hardness measurements at a cross section of the brake calipers were performed, indicating that similar values can be obtained when using the significantly shorter heat treatment cycles.Finally, the typical tensile properties that can be obtained for SSM-HPDC A356 brake calipers are compared with those manufactured by gravity die casting.Results indicate that the differences in microstructures (globular or dendritic) do not have a noteworthy effect on the heat treatment response.This implies that the short heat treatment cycles originally developed for globular SSM-HPDC A356 castings can be successfully applied to dendritic liquid A356 castings too. | H.MLLER G.GOVEN DER W.E.STUMPF | 2010 | Transactions of Nonferrous Metals Society of China2010，20，9： | 3 |
| 7 | 应对全球气候变化的干旱农业生态系统研究--第二届EAM国际会议青年学者论坛综述显示文摘全球气候变暖对干旱农业生态系统管理提出了严峻的挑战,解决方案须从个体到全球不同尺度开展系统研究,并协同考虑与社会经济系统的互作机制。综述了2010年7月24日在兰州大学举行的第二届生态系统评估与管理(EAM)国际会议青年学者论坛的18场青年学者报告,包括全球变化生态学、植物水分生态学、植物营养与土壤生态学、草畜耦合生态学和生态系统设计与管理等5个分支,报告内容从个体尺度到全球尺度、从自然层面到社会层面均有涉及。将会议主题放入Reynolds等人提出的旱地系统发展范式(DDP)、Jianguo Liu等人提出的人与自然耦合系统理论(CHANS)和Thorvald Sφrensen提出的生态区概念(ecotope)及脆弱生态系统差别分层管理理论(SFDM)的视角中开展系统地讨论。总结过去20a在干旱农业生态学方面的研究工作,并融合国际前沿进展,提出在年降水量为300-550 mm的地区如何实施'大面积搞生态、小面积搞生产'和以'提高农业生产力和增加植被覆盖率'为核心的生态系统管理模式。该模式映射了未来几十年高效应对全球变化给干旱农业生态系统管理带来的挑战。 | 赵旭喆 李朴芳 Kadambot H.M Siddique Neil C Turner 李凤民 莫非 熊友才 | 2011 | 生态学报2011，31，9： | 3 |
| 8 | On the friction and adhesion hysteresis between polymer brushes attached to curved surfaces: Rate and solvation effects显示文摘Computer simulations of friction between polymer brushes are usually simplified compared to real systems in terms of solvents and geometry.In most simulations,the solvent is only implicit with infinite compressibility and zero inertia.In addition,the model geometries are parallel walls rather than curved or rough as in reality.In this work,we study the effects of these approximations and more generally the relevance of solvation on dissipation in polymer-brush systems by comparing simulations based on different solvation schemes.We find that the rate dependence of the energy loss during the collision of brush-bearing asperities can be different for explicit and implicit solvent.Moreover,the non-Newtonian rate dependences differ noticeably between normal and transverse motion,i.e.,between head-on and off-center asperity collisions.Lastly,when the two opposing brushes are made immiscible,the friction is dramatically reduced compared to an undersaturated miscible polymer-brush system,irrespective of the sliding direction. | Sissi de BEER G.DjuidjéKENMOÉ Martin H.MÜSER | 2015 | Friction2015，3，2： | 2 |
| 9 | Experimental approaches and analytical technique for determining heavy metals in fallen dust at ferrosilicon production factory in Edfu, Aswan,Egypt显示文摘In this study aimed to evaluate the pollution extent of metals and nonmetals inside and outside the ferrosilicon production factory in Edfu, Aswan, Egypt, raw materials (quartz, cokes, iron oxides), ferrosilicon alloy, silica fume, dust and suspended dust (at different sites) samples were collected from the factory, and fallen dust samples were collected from outside the factory, horizontally (at different sites and different distance and directions) and vertically (at different floors in the selected buildings). Gravimetric methods, X-ray fluorescence (XRF), flame photometer, wide range carbon determinator and atomic absorption spectroscopy tools were used for elements determination. The results indicating that the fallen dust and its element contents on southern factory walls being higher than those on eastern factory walls may be due to the nature of the dusts and effects of wind force and wind direction. Fallen dust levels in different regions outside the factory were found to be affected by the distance, direction and floors. The nature of dust samples was affected by gravity and the suspended dust in different factory units depended on the work capacity and method of handling materials by personnel in different production units. Silica fume was a complicated problem, had dangerous effect against the workers' health, and was characterized by high concentrations of SiO2(90.6%~93.6%) and heavy metals (Mn, 420.6×10-6~520.3×10-6; Fe, 2354×10-6~2685×10-6; Co, 80.7×10-6~101.6×10 6 and Ni,5.3× 10-6~6.05× 10-6). The TSP (Total Suspended Particulate) levels in all factory units were higher than the recommended air quality value (70 μg/m3) under Egyptian law. The effect of ferrosilicon factory fallen dust on the surrounding regions decreased with increasing distance between the factory and these regions. The suspended dust samples in the factory units and their components greatly exceeded national and international standards, so health and environmental criteria must be enforced on these units. | SOLTAN M.E RAGEH H.M RAGEH N.M AHMED M.E | 2005 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2005，6，8： | 2 |
| 10 | Influence of elevated Fe,Ni and Cr levels on tensile properties of SSM-HPDC Al-Si-Mg alloy F357显示文摘The microstructures and tensile properties of semi-solid metal high pressure die cast(SSM-HPDC) F357 alloys with low and high levels of Fe,Ni and Cr were compared in different temper conditions.ThermoCalc software was used to predict the different intermetallics that can be expected in the alloys,and scanning electron microscopy(SEM) with energy dispersive spectroscopy(EDS) was used to investigate the actual intermetallics that formed.The influence of these intermetallics on tensile properties was quantified.The results show that lower strength is obtained in the alloy with high Fe,Ni and Cr levels.This is attributed mainly to the formation of more π-Al8FeMg3Si6 phase,which removes strengthening Mg atoms from solid solution.Also,the ductility of the high Fe,Ni and Cr levels alloy is decreased significantly due to microcracking of the higher volume fraction π-Al8FeMg3Si6 and Al9FeNi phases.The combination of lower strength and ductility results in a decrease of the quality index of this alloy compared with the alloy with low levels of Fe,Ni and Cr. | H.MLLER W.E.STUMPF P.C.PISTORIUS | 2010 | 中国有色金属学会会刊:英文版2010，20，S3： | 2 |
| 11 | The Sukari gold mine,eastern Desert-Egypt:structural setting,mineralogy and fluid inclusion study显示文摘 | Helmy H.M Kaindl R Fritz H Loizenbauer J | | 0，，： | 1 |
| 12 | Evaluation and improvement of bedload discharge formulas based on Helley-Smith sampling in an alpine gravel bed river显示文摘 | HABERSACK H.M LARONNE J.B | | 0，，05： | 1 |
| 13 | Effect of sources of maize and maize particle sizes on the utilization of phytate phosphorus in broiler chicks显示文摘 | A.B Kasim H.M Edwards | 2000 | Animal Feed Science and Technology2000，，1： | 1 |
| 14 | Inhibitory action of water soluble fraction of Terminalia chebula on systemic and local anaphylaxis显示文摘 | T.Y Shin H.J Jeong D.K Kim S.H Kim J.K Lee D.K Kim B.S Chae J.H Kim H.W Kang C.M Lee K.C Lee S.T Park E.J Lee J.P Lim H.M Kim Y.M Lee | 2001 | Journal of Ethnopharmacology2001，，2： | 1 |
| 15 | Heme oxygenase-1: role in brain aging and neurodegeneration显示文摘 | H.M Schipper | 2000 | Experimental Gerontology2000，，6： | 1 |
| 16 | Development of simple sequence repeat(SSR)markers from a genome survey of Chinese bayberry(myrica rubra)显示文摘 | Jiao Y Jia H.M Li X.W Chai M.L. Jia H.J. Chen Z. Wang G.Y. Chai C.Y. van de Weg E.W. Gao Z.S | | 0，，01： | 1 |
| 17 | 查看详情显示文摘 | Zhang Y Wang L.L Liu B.K Zhai J.L Fan H.M Wang D..J Lin Y.H Xie T.F | | 0，，： | 1 |
| 18 | Specialization and diversification in a system of cities显示文摘 | Abdel Rahman H.M Fujita M | | 0，，02： | 1 |
| 19 | Optimization of androstenedione production in an organic-aqueous two-liquid phase system显示文摘 | Staebler A Cruz A van der Goot W Pinheiro H.M Cabral J.M.S Fernandes P | | 0，，： | 1 |
| 20 | 查看详情显示文摘 | Xu Y.D Zhang Z.Y Kong J.L Li G.D Xiong H.M | | 0，，7： | 1 |
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