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| 1 | Synthesis and Characterization of Mesoporous Alumina via a Reverse Precipitation Method显示文摘Mesoporous alumina γ-Al_2O_3 with high specific surface area and large pore volume is prepared by using a facile reverse precipitation method from sodium aluminate and nitric acid.The effects of terminal pH value,aging time and thermal stability on the characterization of γ-Al_2O_3 are studied by means of X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),Brunauer-Emmett-Teller(BET) method and scanning electron microscopy(SEM).The results show that γ-Al_2O_3 with better properties can be obtained by changing the preparation parameters.High BET surface area of 340(m^2)/g can be obtained by calcining at 500 ℃ for 4 h with large pore volume of 0.90(cm)~3/g and average pore size of 7.6 nm.After calcining at 1000°,the surface area is still 86 m2/g and the pore volume is 0.37(cm)~3/g. | Y.S.Wu J.Ma F.Hu M.C.Li | 2012 | Journal of Materials Science & Technology2012，28，6： | 3 |
| 2 | 聚合酶链式反应扩增DNA直接测序技术基因诊断β—地中海贫血显示文摘用测序酶及寡核苷酸引物以Sanger的二脱氧末端终止法,对经聚合酶链式反应体外酶促扩增的DNA进行直接双链DNA测序。共分析了8例临床诊断为β—地中海贫血病人的16条染色体上的β—珠蚕白基因。方法简便、快速、准确可靠,可用于地贫及其他单基因遗传病的基因分析及癌基因奕变分析。 | 谢慎思 谭荣安 林关绵仙 胡玉娟 Anita M.C.Li | 1990 | 湖南医科大学学报1990，15，4： | 1 |
| 3 | Hardening and toughening effects of intermediate nanosized structures in a confined amorphous alloy film显示文摘The plastic deformation of amorphous alloys is well known to be localized into shear bands(SBs),which are believed to stem from the atomic-scale flow defects,i.e.,shear transformation zones(STZs).Yet,the bridge between the mesoscopic SBs and the atomic-scale STZs remains poorly understood.In this work,through thermally activating pronouncedβrelaxations in the well-designed crystalline-layer confined amorphous(CLCA)Ni W alloy films,we experimentally captured and observed an intermediate nanosized structure termed as“nano shear bands”(NSBs)with a typical size of 1–2 nm in thickness and5–10 nm in length.The influences of such NSB structures on the macroscale deformation behavior were systematically investigated.It was found that NSBs lead to both hardening and toughening effects for the CLCA films,as they promote multiple and controlled shear banding deformation,which results in enhanced crystallization.The intermediate NSB structure could connect the microstructural characteristics and macroscopic plasticity in amorphous alloys and may provide new insights for understanding the microscopic deformation mechanism of amorphous alloys as well as tuning/designing their properties. | Z.Q.Chen M.C.Li X.Tong Y.Zhao J.Y.Xie S.W.Guo P.Huang F.Wang H.B.Ke B.A.Sun W.H.Wang | 2022 | Journal of Materials Science & Technology2022，，23： | 0 |
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