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| 1 | A STUDY OF STRUCTURE AND PROPERTY CHANGES OF BIODEGRADABLE POLYGLYCOLIDE AND POLY(GLYCOLIDE-co-LACTIDE)FIBERS DURING PROCESSING AND IN VITRO DEGRADATION显示文摘Structure and properties of bioabsorbable polyglycolide (PGA) and poly(glycolide-co-lactide) (PGA-co-PLA)fibers were investigated during several industrial processing stages and in vitro degradation by means of wide-angle X-ray diffraction (WAXD), dynamic mechanical analysis (DMA) and mechanical property tests. In the orientation stage, the PGA fibers were found to have higher degrees of crystallinity than corresponding PGA-co-PLA samples produced under similar conditions. In the hot-stretching and post-annealing stages, after fibers were braided, PGA samples were found to gain more crystallinity and higher Tg than PGA-co-PLA samples. The higher crystallinity in PGA fibers resulted in a slower rate of degradation. DMA results showed that a great deal of internal stress that was built during orientation and hot-stretching stages was released in the post-annealing stage for all PGA and PGA-co-PLA samples. During earlier stages ofin vitro degradation, both PGA and PGA-co-PLA samples exhibited the typical cleavage-induced crystallization mechanism. The heat shrinkage in the glass transition area was found to disappear after 6-8 days of degradation for all PGA and PGA-co-PLA samples, indicating the amorphous portions of the polymers lost orientation after a short period in the buffer solution, most likely due to relaxation of the cleaved chains. | Bruce X.Fu Benjamin S.Hsiao Gavin Chen Jack Zhou Susan Lin Jenny Yuan Ilya Koyfman Dennis D Jamiolkowski Edward Dormier | 2003 | Chinese Journal of Polymer Science2003，21，2： | 9 |
| 2 | Acute stroke,catheterrelated venous thrombosis,and paradoxical cerebral embolism :report of two cases显示文摘 | Petrea RE Koyfman F Pikula A | 2013 | J Neuroimaging2013，23，1： | 1 |
| 3 | Self-Assembly of DNA Arrays into Multilayer Stacks显示文摘 | Koyfman A Y Magonov S N Reich N O | 2009 | Langmuir2009，25，2： | 1 |
| 4 | Bedside Percutaneous Tracheostomy versus Open Surgical Tracheostomy in Non-ICU Patients显示文摘 | Evgeni Brotfain Leonid Koyfman Amit Frenkel | 2014 | Critical Care Research and Practice2014，，15： | 1 |
| 5 | An experimental investigation of bubble pump performance for diffusion absorption refrigeration system with organtic working fluids 显示文摘 | Koyfman A Jelinek M | 2003 | Applied Thermal Engineering2003，23，： | 1 |
| 6 | The efficacy of external beam radiotherapy and stereotactic body radiotherapy for painful spinal metastases from renal cell carcinoma显示文摘 | Grant K. Hunter Ehsan H. Balagamwala Shlomo A. Koyfman Trevor Bledsoe Lawrence J. Sheplan Chandana A. Reddy Samuel T. Chao Toufik Djemil Lilyana Angelov Gregory M.M. Videtic | 2012 | Practical Radiation Oncology2012，，4： | 1 |
| 7 | Are Antibiotics Effective in the Treatment of Acute Bronchitis 显示文摘 | SINGH M KOYFMAN A | 2014 | Ann Emerg Med2014，65，5： | 1 |
| 8 | Successful percutaneous drainage of large and multiloculated pyogenic liver abscesses in critically ill patients显示文摘 | Brotfain E Koyfman L Frenkel A | 2014 | IJCRI2014，5，1： | 1 |
| 9 | Marginal recurrence requiring salvage radiotherapy after stereotactic body radiotherapy for spinal metastases显示文摘 | Koyfman SA Djemil T Burdick MJ | | 0，，01： | 1 |
| 10 | Traumatic atlanto-occipital dislocation with survival:a case report and review of the literature显示文摘 | Harmanli O Koyfman Y | | 0，，04： | 1 |
| 11 | Stereotactic radiosurgery for single brainstem metastases: the cleveland clinic experience显示文摘 | Koyfman SA Tendulkar RD Chao ST | 2010 | Int J Radiat Oncol Biol Phys2010，78，： | 1 |
| 12 | Marginal Recurrence Requiring Salvage Radiotherapy After Stereotactic Body Radiotherapy for Spinal Metastases显示文摘 | Shlomo A. Koyfman Toufik Djemil Michael J. Burdick Neil Woody Ehsan H. Balagamwala Chandana A. Reddy Lilyana Angelov John H. Suh Samuel T. Chao | 2012 | International Journal of Radiation Oncology, Biology, Physics2012，，1： | 1 |
| 13 | Does uhrasonographic guidance reduce failure rates and adverse events for subclavian vein catheteriza- tion compared with the landmark technique? 显示文摘 | Kim JL Koyfman A | 2015 | Ann Emerg Med2015，66，6： | 1 |
| 14 | Thrombotic thrombocytopenic purpura 显示文摘 | Koyfman A Br6m E Chiang VW | 2011 | Pediatr Emerg Care2011，27，11： | 1 |
| 15 | Biosimilarity and Interchangeability in the Biolog- ics Price Competition and Innovation Act of 2009 and FDA's 2012 Draft Guidance for Industry 显示文摘 | KOYFMAN H | 2013 | Biotechnol Law Rep2013，32，4： | 1 |
| 16 | Biosimilarity and Interchangeability in the Biolog- ics Price Competition and Innovation Act of 2009 and FDA's 2012 Draft Guidance for Industry显示文摘 | KOYFMAN H | 2013 | Biotechnol Law Rep2013，32，4： | 1 |
| 17 | An experimental investigation of bubble pump performance for diffusion absorption refrigeration system with organic working fluids显示文摘 | A Koyfman M Jelinek A Levy I Borde | 2003 | Applied Thermal Engineering2003，，15： | 1 |
| 18 | An experimental in- vestigation of bubble pump performance for diffusion ab- sorption refrigeration system with organic working fluids 显示文摘 | Koyfman A Jelinek M Levy A | 2003 | Applied Thermal Engineering2003，23，15： | 1 |
| 19 | Can Heimlich valves along with intercostal catheters be used to safely manage pneumothoraees for outpatients显示文摘 | Tupchong K Foran M Koyfman A | 2014 | Ann Emerg Med2014，64，6： | 1 |
| 20 | Conventional MRI does not reliably distinguish radiation necrosis from tumor recurrence after stereotactic radiosurgery显示文摘 | Stockham AL Tievsky AL Koyfman SA | | 0，，： | 1 |
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