http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전도선 Poly(vinyl Chloride)/Poly(aniline) 복합체의 제조 및 전기적 성질
이민구,한명희,김병일,박연홈 한국섬유공학회 1992 한국섬유공학회지 Vol.29 No.12
Electrically conducting poly(vinyl chloride)Ipoly(aniline) (PVC/PANi) composite films were prepared by exposing PVC films containing ferric chloride to aniline vapor under various polymerization conditions. Their electrical and physical properties and morphologies were stu-died. Hydrochloric acid was used for the preparation of protonated PVC/PANi composite films. The electrical conductivity of PVC/PANi composite films lie in the range of 1O- 7~1O- $^2$ S/cm, depending on the preparation conditions such as the concentration of ferric chloride and hydro-chloric acid, and polymerization temperature. The formation of PANi in PVC matrix was confirmed by FT-IR spectroscopy and scanning electron microscopy.
이민구,원중연,김형종 대한이비인후과학회 2014 대한이비인후과학회지 두경부외과학 Vol.57 No.7
Background and Objectives There is no consensus on the prognostic factors regarding pos-toperative recurrence after myringoplasty. In this study, we investigated the preoperative clinical findings and postoperative results after primary myringoplasty and compared them with those of revision myringoplasty. Subjects and Method Computerized database of 861 clinical records of last 20 years were analyzed retrospectively for the subjects who underwent myringoplasty at the Department of Otolaryngology, University of Korea. All the surgeries were done under general or local anesthesia by senior surgeons. Primary and revision cases of myringoplasty or type 1 tympanoplasty followed up at least for longer than 3 months were only included in the study. Those other cases of tympanoplasty types, concomitant ossiculoplasty and/or mastoidectomy, or those with the presence of cholesteatoma and those that required repair during exploratory tympanotomy were excluded. Results 535 primary and 101 revision cases have met our inclusion criteria. Overall, in this study, the failure rates of primary and revision myringoplasty were 11.02% and 5.94%, respectively. Significantly different among the prognostic factors were such as sex, age, anesthesia, surgical approach, the presence of otorreha, size of eardrum perforation, external auditory canal narrowing, valsalva test, degree of pneumatization, graft materials, tympanoplasty type, previous mastoidectomy, the presence of bilateral otitis media influencing on myringoplasty revision, and the presence of otorrhea and sclerotic type of mastoid pneumatization. Conclusion Among various prognostic factors of myringoplasty, poor prognostic factors were preoperative otorrhea and poor pneumatization. Korean J Otorhinolaryngol-Head Neck Surg 2014;57(7):454-9