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| 1 | Induction of corneal epithelial progenitors from bone-marrow mesenchymal stem cells of rhesus monkeys in vitro显示文摘Bioengineered corneas are substitutes for human donor tissue that are designed to treat severe dis-ease affecting ocular surfaces. However,a shortage of candidate seed cells for bioengineering corneas is still a problem. Bone-marrow mesenchymal stem cells (MSCs) are capable of multilineage differen-tiation. Therefore,we determined whether MSCs differentiate into corneal epithelial cells (ECs). We applied three exoteric-microenvironmental systems to induce MSCs to become ECs. Induced MSC were identified by means of morphologic examination,immunocytochemical analysis,and flow cytometry. MSCs grown in one microenvironment had characteristics similar to those of corneal epithelial pro-genitors. Induced MSCs expressed markers for EC,including integrin β1,Cx43,Pax6,and P63. MSCs were successfully induced to become corneal epithelial progenitors. Therefore,the use of MSCs may hold substantial promise for reconstructing the ocular surface after corneal injury. | YUAN Jing YU JianXiong HUANG Bing LIU BingQian LIU JingBo JIANG RuZhang GE Jian | 2007 | Chinese Science Bulletin2007，52，16： | 6 |
| 2 | EMBRITTLEMENT OF Fe-Cr-Al ALLOYS AND EFFECT OF Y ADDITION显示文摘A high temperature embrittlement occures in Fe-15Cr-4AI and Fe-20Cr-4Al alloys treatedover 1000 C.It is caused mainly by 475℃ brittleness during cooling.When a secondarytreatment at 500℃ was conducted,the 475℃ brittleness developed very rapidly.After only15 rain of the treating,little plasticity was remained for all samples pretreuted at the temper-atures over 1000℃ and cooled in water.However,no 475℃ brittleness was generated whenpretreating temperature was below 1000℃,Addition of Yttrium can inhibit not only graingrowth,but also 475℃ brittleness.For the alloys with 0.2—0.4 wt-%Y,after treating at800—1300℃,the plasticity did not decrease and the properties of furnace cooled sampleswere not lower than those of water cooled samples. | LI Bei WU Shuangxia LI Dianchen Baotou Research Institute of Rare Earth Ministry of Metallurgical Industry,Baotou,ChinaMA Ruzhang University Science and Technology Beijing,Beijing,China Baotou Research Institute of Rare Earth,Ministry of Metallurgical Industry,Baotou 014010,China | 1993 | Acta Metallurgica Sinica(English Letters)1993，6，2： | 4 |
| 3 | Gene expression in Barrett's esophagus and reflux esophagitis induced by gastroduodenoesophageal reflux in rats显示文摘AIM: To investigate the difference of gene expression profiles between Barrett's esophagus and reflux esophagitis induced by gastroduodenoesophageal reflux in rats.METHODS: Eight-week-old Sprague-Dawley rats were treated esophagoduodenostomy to produce gastroduodenoesophageal reflux, and another group received sham operation as control. Esophageal epithelial tissues were dissected and frozen in liquid nitrogen immediately for pathology 40 wk after surgery. The expression profiles of 4 096 genes in reflux esophagitis and Barrett's esophagus tissues were compared with normal esophageal epithelium by cDNA microarray.RESULTS: Four hundred and forty-eight genes in Barrett'sesophagus were more than three times different from those in normal esophageal epithelium, including 312 up regulated and 136 down-regulated genes. Two hundred and thirty-twogenes in RE were more than three times different from those in normal esophageal epithelium, 90up-regulated and 142 down-regulated genes. Compared to reflux esophagitis, there were 214 up-regulated and 142 down-regulated genes in Barrett's esophagus. CONCLUSION: Esophageal epithelium exposed excessively to harmful ingredients of duodenal and gastric reflux can develop esophagitis and Barrett's esophagus gradually.The gene expression level is different between reflux esophagitis and Barrett's esophagus and the differentially expressed genes might be related to the occurrence and development of Barrett's esophagus and the promotion or progression in adenocarcinoma. | PengCheng JunGong TaoWang ChenJie GuiShengLiu RuZhang | 2005 | World Journal of Gastroenterology2005，11，21： | 1 |
| 4 | Small moving infrared space target tracking algorithm based on probabilistic data association filter显示文摘 | Zhengzhou Li Jing Chen Yuanshan Gu Lan Tang Zhen Dai Hongxia Fu Ruzhang Li Changju Liu Gang Jin | 2014 | Infrared Physics and Technology2014，，： | 1 |
| 5 | THERMAL NUCLEATION AND GROWTH OF He BUBBLES IN He IMPLANTED STAINLESS STEELS显示文摘Nucleation and growth of He bubbles at different annealing temperatures T≤1023 K in stain-less steels HR-2 and SS321,implanted with He+(40-70 keV.1×1016-6×1017 He+/cm2),were ohserved under TEM.T=0.45Tm seems to be a transitiontemperature.The He bubbles continue mainly their nucleation at 0.3Tm< T<0.45Tm,andgrow predominantly at T≥0.45Tm,due probably to migration and coalescence by surfacediffusion of metal atoms around the bubbles.The apparent activation energies for the growthare found to he 0.41 and 0.31 eV for HR-2 and SS321 respectively.The bubble density inHR-2 is greater than that in SS321 within whole measuring temperature range,and the onsettemperature of rapid swelling is also higher.It is believed that the resistance of HR-2 to He issuperior to that fo SS321. | ZHANG Lei WANG Peixuan TAO Rong MA Ruzhang ZHANG Guoguang University of Science and Technology Beijing,Beijing,China professor,Department of Materials Physics.University of Science and Technology Beijing.Beijing 100083,China | 1993 | Acta Metallurgica Sinica(English Letters)1993，6，3： | 1 |
| 6 | A study on the amorphous alloy Fe78 Si10 B12 in the annealing process by transmission geometry of Mossbauer effect 显示文摘 | Xu Zuxiong Feng Yongrong Ma Ruzhang | 1984 | Research in Metallic Material1984，10，6： | 1 |
| 7 | MSSBAUER INVESTIGATION ON QUENCHED STRUCTURES OF 40CrNiMo STEEL显示文摘The martensite microstructure,amount of retained austenite and its carbon concentration inthe 40CrNiMo steel quenched at various conditions have been investigated by using trans-mission Mossbauer spectroscopy at room temperature.It was shown that high-temperaturequenching and thermomechanical quenching has little influence on amount of retainedaustenite,thus the toughening effect of quenching was attributed to bulk lath martensite andits refining. | XU Zuxiong MA Ruzhang ZHU Yongquan ZHAO Zhongtao FENG Yongrong | 1989 | Acta Metallurgica Sinica(English Letters)1989，2，8： | 0 |
| 8 | Further Investigation on the Correlation between Ionization Potential and Superconductivity of Oxides显示文摘The relations of oxygen content, critical temperature TC and mean ionization potential < U0> of superconducting oxides are reported. We found that in oxides oxygen is the major element which governs their < U0> te values and thus oxygen content plays an jmportant role in their superconducting properties. As for Y(123)- and T1-systems oxygenation may improve their TC values, but for Biand Hg-systems oxygenation process is not so important. In Y(123), as the oxygen content increase results in the increase of TC upon < U0>to, while the substitution of Ba2+ by Sr2+ causes the decrease of TC upon < U0 >. These results may provide some clues about the superconductivity of oxides and support further that < Uo > is really a good criterion for oxide superconductivity. Two kinds of possible superconducting oxides are predicted in this paper according to the mean ionization potential criterion. | Wei CHEM and Ruzhang MA(Dept. of Materials Physics, University of Science and Technology Bejing, Bejing, 100083, China) | 1994 | Journal of Materials Science & Technology1994，10，6： | 0 |
| 9 | Magnetocrystalline Anisotropies of RFe_(10)V_2 (R=Y, Tb, Dy, Ho, and Er) and Their Hydrides显示文摘The magnetocrystalline anisotropies of RFe10V2 (R=Y, Tb, Dy, Ho and Er) and their hydrides were studied by X-ray diffraction, magnetization and a.c. susceptibility measurements. The uniaxial anisotropy of Fe-sublattice and R-sublattice with positive second order Stevens αJ in RFe10V2 compounds is weakened by hydrogenation, while that of R-sublattice with negative αJ (Er) enhanced. Such a change of anisotropy causes planar-easy magnetic structures in RFe10V2 (R=Tb and Dy) at room temperature and induces spin reorientation in HoFe10V2 after hydrogenation. The change of anisotropy of R-sublattice after hydrogenation may be owed to a decrease of the second order crystalline coefficient. | Weiren ZHAO Jueyun PING and Ruzhang MA (Material Physics Dept., University of Science and Technology Beijing, Beijing 100083, China)(Present address: Central Iron & Steel Research Institute,Beijing 100081, China) | 1998 | Journal of Materials Science & Technology1998，14，5： | 0 |
| 10 | (Nd_(0.9)Dy_(0.1))_(16)Co_(5)Fe_(70)Nb_(2)B_(7) PERMANENT MAGNETIC ALLOY AND BEHAVIOUR OF Nb显示文摘The magnetic properties of (Nd_(0.9)Dy_(0.1))_(16)Co_(5)Fe_(70)Nb_(2)B_(7) permanent magnetic alloy prepared by powder metallurgy are:Br=1.08T,_(1)H_(C)=1620kA/m,(BH)_(max)=208kJ/m^(3).The behaviour of Nb in this alloy was studied by joint methods of dynamic observation by high voltage electron microscope(HVEM)and Mossbauer effects.With Nb and Co substituting parts of Fe and adding a little Dy,practical magnetic alloy with excellent properties can be obtained.The thermal stability of it is 80 ℃ higher than that of ternary Nd-Fe-13 magnet.The study shows that adding Nb into Nd-Fe-B can make the intrinsic coercivity appear peak value at about Nb=2%(in mole fraction).Nb mainly enters into Nd-rich and B-rich phases,a little into Nd_(2)Fe_(14)B phase. | Pan Shuming Pan Feng Ma Ruzhang | 1996 | Transactions of Nonferrous Metals Society of China1996，6，1： | 0 |
| 11 | Manufacture of Raney Ni catalyst with metastable Ni_2Al_3 by high energy milling显示文摘The Ni Al alloy containing Cr, Fe additives were prepared as Raney Ni catalyst by high energy milling. The size and surface state of Ni Al alloy powder were studied by particle size analyzer and sanning electron microscopy, the structure was analyzed by XRD and Mssbauer methods. The results showed that after a high energy milling (HEM), the Ni Al alloy transforms to a nano scale NiAl structure with rich Al. By annealing the alloy, a metastable Ni 2Al 3 phase can be obtained. | Teng Ronghou(滕荣厚) 1, Sun Shijie(孙世杰) 1, Liu Silin(刘思林) 1, Liu Xuequan(柳学全) 1, Ma Ruzhang(马如璋) 2,Liu Tao(刘 涛) 3 1. Functional Materials Institute, Central Iron & Steel Research Institute, Beijing 100081, P.R.China 2. Depar | 1999 | 中国有色金属学会会刊:英文版1999，9，3： | 0 |
| 12 | THERMAL STABILITY AND PERPENDICULAR ANISOTROPY OF AMORPHOUS TbFeCo FILMS显示文摘The perpendicular anisotopy,coercivity and Kerr rotation angle of the amorphousTb32Fe54Co14 films were studied.The X-ray,electron diffraction,XPS and AES profile con-firmed that no obvious change in their amorphous structure and oxygen concentration is ob-served after annealing at 100℃,while their properties alter evidently under bending stress.Itseems to be believed that the perpendicular anisotropy in the Tb32Fe54Co14 films mainly arisesfrom the induced stress during preparation and the magnetostriction coupling stress,as wellas,the thermal instability of the film relates closely to the stress relaxation during annealing. | Lü Jian WANG Yinjun MA Ruzhang LU Jian | 1990 | Acta Metallurgica Sinica(English Letters)1990，3，9： | 0 |
| 13 | MOSSBAUER STUDY ON MAGNETIC ANISOTROPY OF AMORPHOUS ALLOY Fe_(71)Ni_(10)B_(13)Si_4C_2显示文摘Magnetic anisotropies of the amorphous alloy Fe71Ni10B13Si14C2 annealed in magnetic fieldhave been studied using Mossbauer spectroscopy and X-ray diffraction.It is shown that thedistribution of moments in the annealed sample are determined by both stress-produced andthermomagnetic treatment-induced magnetic anisotropies. | XU Zuxiong MA Ruzhang University of Science and Technology Beijing,Beijing,ChinaHAN Yongzhu Beijing Institute of Metallurgy,Beijing,China | 1989 | Acta Metallurgica Sinica(English Letters)1989，2，12： | 0 |
| 14 | INCOMMENSURATE AND COMMENSURATE PHASE TRANSITIONS IN Ti-Ni-Fe ALLOY显示文摘Measurements by using the ultrasonic technique together for electric resistance verified thatthe first sound velocity valley on cooling is mainly due to the soft-mode of driving the com-mensurate phase transition,and the second one due to the soft-mode of driving the martensitictransformation.The starting point,R_s,and finishing point,R_f,of the commensurate phasetransition of the alloy have been determined. | RAO Jianxi Naval Academy of Engineering,Wuhan,China MA Ruzhang University of Science and Technology Beijing,Beijing,China HE Yusheng Tsinghua University,Beijing,China MA Ruzhang Professor,Department of Metal Physics,University of Science and Technology Beijing 100083,Beijing,China | 1990 | Acta Metallurgica Sinica(English Letters)1990，3，2： | 0 |
| 15 | EFFECT OF HYDROGEN ABSORPTION ON MAGNETIC PROPERTIES OF AMORPHOUS Fe_(90-x) V_x Zr_(10) ALLOYS显示文摘The amorphous Fe90-xVxZr10 alloy after electolytic hydrogenation procedure was studied bymeans of Mossbauer effect,magnetic measurement.X-ray diffaction and secondary ionmass spectroscopy(SIMS)techniques.The experimental results show that the magneticproperties of amorphous Fe90-xVxZr10 alloy are highly sensitive to the presence of hydrogen.The isomer shift(IS)has a small positive change and the magnetic properties transfer fromparamagnetic to ferromagnetic State by hydrogenation,and the effect of hydrogen absorptionis to raise Fe magnetic moment(from the increase of saturation maguetization)and Curietemperature Tc from 257 to 384 K.Finally.the considerable increase of magnetic properttesof amorphous Fe90-xVxZr10 alloy by hydrogenation is attributable to the change ofhybridization effect between outer electrons of Zr atoms and 3d electrons of Fe atoms.Fromthe results of SIMS experiment,it is concluded that the hydrogen atoms is localized aroundZr atoms wheh hydrogen atoms enter into the allor. | DUO Liang XU Zuxiong MA Ruzhang Beijing University of Science and Technology,Beijing.China Institute of High Energy Physics,Academia Sinica,P.O.Box 2732,Beijing,China | 1989 | Acta Metallurgica Sinica(English Letters)1989，2，7： | 0 |
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