http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
다공구조 내에 고분자 충진된 유연한 투명나무 복합제 패널 제조 연구
윤제문,김영훈,정찬영 한국고분자학회 2023 폴리머 Vol.47 No.2
In this study, wood, which is indestructible and has flexible, and transparent properties, was developed. A flexible and transparent wooden panel was fabricated by removing lignin (delignification) that absorbs light in the visible light region and filling the lignin-removed space with a mixture of polyvinyl alcohol (PVA), which provides transparency, and a low molecular weight compound, which provides flexibility. The delignification process, the infiltration of the polymer mixture, the internal structures, the optical transmittance, and the flexibility of the wood samples were measured and investigated. The analyzed results showed high optical transmittance of 65.8% at 550 nm wavelength when impregnated only with PVA, while the transmittance decreased to around 10% as the mixed amount of low-molecular compounds increased, but the flexibility was greatly improved. Based on these results, it is considered that higher flexible and transparent wood will be a useful material to replace fragile glass material in the future.
윤제문,장미애,기창석,김상진 대한진단검사의학회 2016 Annals of Laboratory Medicine Vol.36 No.2
Stickler syndrome is a genetically heterogeneous disorder that affects the ocular, auditory, and musculoskeletal systems. Ocular-only variant of Stickler syndrome type 1 (OSTL1) is characterized by high risk of retinal detachment without systemic involvement and is caused by alternatively spliced exon 2 mutation of COL2A1. We report the cases of two Korean families with OSTL1 carrying likely pathogenic variants of COL2A1. All patients presented with membranous vitreous anomaly, peripheral retinal degeneration, and/or rhegmatogenous retinal detachment, but no systemic manifestations. By genetic analysis, two likely pathogenic non-exon 2 variants, c.2678dupC (p.Ala895Serfs*49) and c.3327+ 1G>C, were identified in COL2A1. Our results demonstrate that COL2A1 defects in OSTL1 are not confined to mutations in exon 2. Together with molecular data, ophthalmologists should consider genetic diagnosis of Stickler syndrome in patients with vitreous anomaly to prevent blindness from retinal detachment. To our knowledge, this is the first report of genetically confirmed OSTL1 in Korea.
수정체초음파유화술 후에 생긴 인공수정체 탈구의 선행 요인의 빈도와 치료 결과
윤제문(Je Moon Yoon),현주(Joo Hyun),임동희(Dong Hui Lim),정의상(Eui Sang Chung),정태영(Tae Young Chung) 대한안과학회 2016 대한안과학회지 Vol.57 No.1
Purpose: To report the predisposing factors and surgical outcomes of intraocular lens dislocation (IOL) after phacoemulsification. Methods: We performed a retrospective study of 131 eyes in 120 patients who were diagnosed with IOL dislocation after phacoemulsification between January 2008 and December 2013. The main outcomes are possible predisposing factors, characteristics of IOL dislocation, and outcomes of rectification surgery, including visual acuity (VA), and refractive status before and at 3 months after surgery. Results: The main conditions associated with IOL dislocation were as follows: status after vitrectomy (27.5%), long axial length(9.2%), neodymium-doped yttrium aluminium garnet (Nd:YAG) posterior capsulotomy (8.4%), uveitis (6.1%), trauma (5.3%), mature cataract (3.8%), and pseudoexfoliation (2.3%). Mean uncorrected VA improved significantly after rectification surgery (p= 0.00), and best-corrected VA also improved significantly (p = 0.01). Mean value of spherical equivalent tended to decrease, although the decrease was not significant (p = 0.07). Whereas astigmatism showed a significant increase (p = 0.01). 6 eyes (4.6%)were associated with recurrence of IOL dislocation. Conclusions: Possible major predisposing factors for IOL dislocation are status after vitrectomy, long axial length, Nd:YAG posterior capsulotomy, uveitis, and trauma. The surgical outcome and improvement of postoperative visual acuity were satisfactory.