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| 1 | Forming of magnesium alloy microtubes in the fabrication of biodegradable stents显示文摘Magnesium alloys have, in recent years, been recognized as highly promising biodegradable materials, especially for vascular stent applications. Forming of magnesium alloys into high-precision thin-wall tubes has however presented a technological barrier in the fabrication of vascular stents, because of the poor workability of magnesium at room temperature. In the present study, the forming processes, i.e., hot indirect extrusion and multi-pass cold drawing were used to fabricate seamless microtubes of a magnesium alloy. The magnesium alloy ZM21 was selected as a representative biomaterial for biodegradable stent applications. Microtubes with an outside diameter of 2.9 mm and a wall thickness of 0.2 mm were successfully produced at the fourth pass of cold drawing without inter-pass annealing. Dimensional evaluation showed that multipass cold drawing was effective in correcting dimensional non-uniformity arising from hot indirect extrusion. Examinations of the microstructures of microtubes revealed the generation of a large number of twins as a result of accumulated work hardening at the third and fourth passes of cold drawing, corresponding to the significantly raised forming forces. The work demonstrated the viability of the forming process route selected for the fabrication of biodegradable magnesium alloy microtubes. | Lixiao Wang Gang Fang Lingyun Qian Sander Leeflang Jurek Duszczyk Jie Zhou | 2014 | Progress in Natural Science:Materials International2014，24，5： | 2 |
| 2 | Antecedents to strategic flexibility: Management cognition, firm resources and strategic options 显示文摘 | Combe I A Rudd J M Leeflang P S H | 2012 | European Journal of Marketing2012，46，10： | 1 |
| 3 | Opinion leaders' role in innovation diffusion: a simulation study 显示文摘 | Eck P S V Jager W Leeflang P S H | 2011 | Joural of Product Innovation Management2011，28，2： | 1 |
| 4 | Long-tenn biodegrada- tion and associated hydrogen evolution of duplex-structured Mg-Li-A1- (RE) alloys and their mechanical properties 显示文摘 | Leeflang M A Dzwonczyk J S Zhou J | 2011 | Materials Science and Engineering B2011，176，： | 1 |
| 5 | Diversity and seasonal fluctua- tions of the dominant members of the bacterial soil community in a wheat field as determined by cultivation and molecular methods 显示文摘 | Smit E Leeflang P Gommans S | 2001 | Applied and Environmental Microbiology2001，67，： | 1 |
| 6 | Diversity and seasonal fluctuations of the dominant members of the bacterial soil community in a wheat field as determined by cultivation and molecular methods 显示文摘 | Smit E Leeflang P Gommans S | 2001 | Applied and Environmental Microbiology2001，67，5： | 1 |
| 7 | Molecular i- dentification of ectomycorrhizal mycelium in soil horizons 显示文摘 | Landeweert R Leeflang P Kuyper TW | 2003 | Applied and Environmental Microbiology2003，69，1： | 1 |
| 8 | Multipass cold drawing of magnesium alloy minitubes for biodegradable vascular stents显示文摘 | Gang Fang Wei-jiang Ai Sander Leeflang Jurek Duszczyk Jie Zhou | 2013 | Materials Science & Engineering C2013，，6： | 1 |
| 9 | Diagnostic test accuracy may vary withprevalence: implications for evidence-based diagnosis显示文摘 | Leeflang MM Bossuyt PM Irwig L | 2009 | J Clin Epidemiol2009，62，1： | 1 |
| 10 | Molecular identifi- cation of ectomy corrhizal myeelium in soil horizons显示文摘 | Landeweert R Leeflang P Kuyper T W | 2003 | Appl En- viron Mierobiol2003，69，1： | 1 |
| 11 | Galactomannan detection and diagnosis of invasive aspergillosis 显示文摘 | Donnelly JP Leeflang MM | 2010 | Clin Infect Dis2010，50，： | 1 |
| 12 | Systematic reviews of diagnostic test accuracy 显示文摘 | Leeflang M M Deeks J J Gatsonis C | 2008 | Ann Intern Med2008，149，： | 1 |
| 13 | Opinion leaders' role in innovation diffusion: a simulation study 显示文摘 | Eck P S V Jager W Leeflang P S H | 2011 | Joural of Product Innovation Management2011，28，2： | 1 |
| 14 | Galactomnnan detectiong and diagnosis of invasive aspergillosis 显示文摘 | Donnelly JP Leeflang MM | 2010 | Clin Infect Dis2010，50，7： | 1 |
| 15 | Diversity and seasonal fluctuations of the dominant members of the bacterial soil community in a wheat field as determined by cultivation and molecular methods 显示文摘 | Smit E Leeflang P Gommans S | 2001 | Appl Environ Microbiol2001，67，5： | 1 |
| 16 | Molecular ident-ification of ectomycorrhizal mycelium in soil horizons显示文摘 | Landeweert R Leeflang P KuyperT W | 2003 | Appliedand Environmental Microbiology2003，69，1： | 1 |
| 17 | Accuracy of body mass index in predicting pre-eclampsia: bivariate meta-analysis 显示文摘 | Cnossen JS Leeflang MM de Haan EE | 2007 | BJOG2007，114，12： | 1 |
| 18 | Diversity and seasonal fluctuations of the dominant members of the bacterial soil community in a wheat field as determined by cultivation and molecular methods显示文摘 | Smit E Leeflang P Gommans S | 2001 | Applied Environmental Microbiology2001，67，5： | 1 |
| 19 | EASI, (objective) SCO- RAD and POEM for atopic eczema: responsiveness and minimal clini - cally importantdifference 显示文摘 | Schram ME Spuls PI Leeflang MM eta1 | 2012 | Allergy2012，67，99： | 1 |
| 20 | Molecular identification of ectomycorrhizal mycelium in soil horizons显示文摘 | LANDEWEERT R LEEFLANG P KUYPER T W | 2003 | Applied and Environmental Microbiology2003，69，1： | 1 |
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