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| 1 | Effects of oriented substrates on cell morphology,the cell cycle,and the cytoskeleton in Ros 17/2.8 cells显示文摘Absence of gravity or microgravity influences the cellular functions of bone forming osteoblasts.The underlying mechanism,however,of cellular sensing and responding to the gravity vector is poorly understood.This work quantified the impact of vector-directional gravity on the biological responses of Ros 17/2.8 cells grown on upward-,downward-or edge-on-oriented substrates.Cell morphology and nuclear translocation,cell proliferation and the cell cycle,and cytoskeletal reorganization were found to vary significantly in the three orientations.All of the responses were duration-dependent.These results provide a new insight into understanding how osteoblasts respond to static vector-directional gravity. | LI Hong,CHEN Juan,ZHANG Yan,SUN ShuJin,TAO ZuLai & LONG Mian* Key Laboratory of Microgravity,Institute of Mechanics,Chinese Academy of Sciences,and National Microgravity Laboratory and Center for Biomechanics and Bioengineering,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China | 2010 | Science China(Life Sciences)2010，53，9： | 5 |
| 2 | Effect of Ni Addition on Microstructure of Matrix in Casting Tungsten Carbide Particle Reinforced Composite显示文摘Microstructure of the matrix directly influences the performance and the application of metal matrix composites. By using vacuum casting-infiltration method to manufacture casting tungsten carbide particle reinforced composite,the addition of Ni can alter the microstructure of the matrix of composite.High carbon chromium steel was chosen as the substrate.The casting process was achieved at 1580℃with vacuum degree of 0.072—0.078 MPa.Padding of the molten steel in each part of the preform was different,and the solidification of each part of the composite was different,too.Microstructure of the matrix was various in different parts of the composite.The Ni addition had enlarged the austenite zone in matrix,which would improve the corrosion resistance of the composite.The phase identification of the composite was performed by X-ray diffraction technique.The result showed that Fe3W3C was the primary precipitated carbide and its composition had a direct link with the decomposition of the casting tungsten carbide particles.The hardness of the matrix mainly depended on the reinforced carbide,i.e.Fe3W3C. | Quan Shan Zulai Li Yehua Jiang Rong Zhou Yudong Sui | 2013 | Journal of Materials Science & Technology2013，29，8： | 3 |
| 3 | Preparation and Corrosion Resistance of Silicate Passivation Film Formed on Galvanized Zn Coatings显示文摘In this paper,one kind of silicate passivation technics was reported and by which method silicate passivation film on galvanized Zn coatings with satisfactory property was got.Zn coatings were prepared by conventional plating technics.The solution composition and operating conditions of passivation are:sodium silicate 10-30 g/L,H2SO4 5 mL/L,HNO3 5 mL/L,H2O2 5-20 mL/L,pH 1.5-2.5,passivation time 5-30 s,temperature 25℃.The corrosion resistance of galvanized Zn coatings with different passivated technics were investigated by NSS corrosion test and compared with Zn coatings treated by Cr(VI)and Cr(III).The silicate passivation film can keep no rust for 72 h and obviously shows the best property.Surface morphologies of galvanized Zn coatings with different passivated method were got by metallurgical microscopy,and the silicate passivation film shows the most uniform surface,and has the least micro-hole.All the results show that silicate passivation technics can provide galvanized Zn coatings superior anti-corrosion performance and simultaneously avoid the pollution of chromium,so this technology has a wide application in future. | Fan Yunying Jiang Yehua Li Zulai | 2012 | 稀有金属材料与工程2012，41，S1： | 2 |
| 4 | Effect of Cr addi- tion on the microstrueture and abrasive wear resistance of WC- reinforced iron matrix surface composites显示文摘 | LI Zulai JIANG Yehna ZHOU Rong | 2014 | Journal of Materi- als Research2014，29，6： | 1 |
| 5 | Dry three-body abrasivewear behavior of WC reinforced iron matrix surface compositesproduced by V-EPC infiltration casting process 显示文摘 | Zulai Li Yehua Jiang Rong Zhou etal | 2007 | Wear2007，262，： | 1 |
| 6 | Dry three-body abrasive wear behavior of WC reinforced iron matrix surface composites produced by V-EPC infiltration casting process显示文摘 | Zulai Li Yehua Jiang Rong Zhou Dehong Lu Rongfeng Zhou | 2006 | Wear2006，，5： | 1 |
| 7 | Dry three-body abrasive wear behavior of WC reinforced iron matrix surface composites producedbyV-EPCinfiltrationcastingprocess显示文摘 | Li Zulai Jiang Yehua Zhou Rong | 2007 | Wear2007，262，： | 1 |
| 8 | Dry three-body abrasive wear behavior of WC reinforced iron matrix surface composites produced by V-EPC infiltration casting process 显示文摘 | Li Zulai Jiang Yehua Zhou Rong | 2007 | Wear2007，262，56： | 1 |
| 9 | A Semiotic Approach to Social Discourses on Colombian Political Events of the Late Twentieth Century显示文摘The paper that we present below addresses a methodological approach to Marc Angenot’s statements,in his Social Discourse(2012)of integrating certain views and opinions,taken from the written press,literature,and television,on events happened in Colombia,prior to 1990 presidential elections.When we study the discursivities1 that are the product and/or the representatives of some political crimes that took place in Colombia between August 1989 and April 1990,we speak mainly on discourses that took place some decades ago.Some of these stories have allowed us to give meaning to the world and,at the same time,integrate us in it. | Erika Zulay Moreno Bueno | 2019 | Journal of Philosophy Study2019，9，10： | 0 |
| 10 | Influence of cerium and yttrium addition on strength and electrical conductivity of pure aluminum alloys显示文摘To develop pure aluminum alloys with high conductivity and strength, Al-0.2Ce and Al-0.2Ce-0.1Y alloys were prepared by rolling and annealing processes in this study. The effects of trace rare earth elements on the strength and electrical conductivity of the pure aluminum alloys were investigated. It is revealed that the addition of Ce and Y to pure aluminum can effectively enhance the strength and electrical conductivity of the alloys. In Al-0.2Ce, the addition of Ce can effectively refine the grain size of a-Al, with an average grain size of 90.68 μm in the as-cast state. The grain size of the alloy is further reduced to 87.55 μm by the simultaneous addition of Y. The synergistic addition of Ce and Y changes the properties of the alloy. The addition of Ce and Y also produces the Al_(11)Ce_(3) and Al_(3)Y second phases, which have coherent relationship with a-Al. The two-dimensional mismatch degree was calculated to be only 4.43%and 0.85%, respectively, which can provide a certain amount of nucleation substrate for a-Al in the incubation stage. The interfacial match between the L1_(2)structure of Al_(3)Y and a-Al was calculated using first-principles simulations. The results indicate that Al_(3)Y has a strong bonding effect with a-Al. Nanoscale second phases at grain boundaries can be effective in reducing resistivity due to dislocation motion.Nanoscale second phases with better matching interfaces to the substrate have no positive effect on the scattering motion of electrons. | Guojian Lin Lu Li Zhengwei Guo Xianjun Jia Xiao Wang Zhentao Yuan Guoxing Zhang Yun Zhan Quan Shan Zulai Li | 2024 | Journal of Rare Earths2024，42，3： | 0 |
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