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강상욱,권오민,최형민,곽영제,Kang, Sang-Wook,Kwon, O-Min,Choi, Hyung-Min,Kwark, Young-Je 한국섬유공학회 2008 한국섬유공학회지 Vol.45 No.6
Nanofibers of phenylsilsesquiazanes (SSQZ), as a precursor of inorganic silicon nitride nanoweb, was prepared using the electrospinning process. The SSQZ was prepared by ammonolysis of phenyl trichlorosilane and condensation of the resulting aminosilanes. The molecular weight of resulting SSQZ increased with initial concentration of phenyl trichlorosilane, reaching plateau above 20wt% of the silane. When the SSQZ was electrospun alone, it did not form fiber even with 20wt% concentration of SSQZ. However, it was possible to prepare fibers by adding poly(ethylene oxide) (PEO) as a viscosity enhancer. The diameter the of electro spun fibers was modified by the total polymer content and the content of PEO. The best result was obtained when the total concentration of the polymer was in the range of 15 to 20 wt% while the SSQZ/PEO ratio was 95/5.
임상연구 : 경막외 통증자가조절 시 0.2% Ropivacaine과 150 μg/ml Alfentanil 혼합된 0.15% Ropivacaine의 효과 비교
황성미 ( Sung Mi Hwang ),권오민 ( O Min Kwon ),이재준 ( Jae Jun Lee ),임소영 ( So Young Lim ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.50 No.5
Background: The lower levels of cardiotoxicity and motor block make ropivacaine well suited as an epidural infusion for postoperative analgesia. This study examined the analgesic efficacy of an epidural infusion of ropivacaine alone and in combination with alfentanil after major abdominal surgery. Methods: Thirty patients undergoing major abdominal surgery under general anesthesia were divided into two groups receiving patient-controlled thoracic epidural analgesia with 0.2% ropivacaine (Group I) and 0.15% ropivacaine +150μg/ml alfentanil (Group II). The motor block, side effects, VAS (visual analog pain scale) score on coughing and resting, additional analgesics use, and patient`s satisfaction were checked for 24 hours after a loading dose injection. Results: The VAS score in group II was significantly lower than in group I, and the patients in group II were more satisfied than those in group I (P < 0.05). However, there were more side effects in group II. Conclusions: Postoperative epidural infusion of 0.15% ropivacaine with 150μg/ml alfentanil is more effective than 0.2% ropivacaine only. (Korean J Anesthesiol 2006; 50: 541~5)