http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
누구접근법으로 안와내벽골절정복술 후 발생한 신경성눈꺼풀처짐
유성광,안민,Seong-Kwang Ryu,Min Ahn 대한안과학회 2011 대한안과학회지 Vol.52 No.5
Purpose: We report a case of neurogenic blepharoptosis after reconstruction of a medial orbital wall fracture using the transcaruncular approach. Case summary: A 13-year-old girl presented with left eyeball pain and binocular diplopia caused by trauma from falling. Orbital computerized tomography showed a blowout fracture of the left medial orbital wall, herniation of the orbital soft tissue into the ethmoid sinus, and a portion of the medial rectus muscle trapped in the fracture. The patient underwent successful reconstruction of the medial orbital wall using the transcaruncular approach. However, moderate blepharoptosis with functional loss of the levator palpebrae superioris muscle developed immediately after awaking from the anesthesia. The blepharoptosis was presumed to have developed due to postoperative edema; therefore, oral corticosteroid was prescribed. However, the blepharoptosis did not improve. No other ocular signs or symptoms were detected. Because neither the margin reflex distance (MRD1) nor the function of the levator palpebrae superioris muscle recovered after eight weeks of conservative treatment, surgical correction of blepharoptosis was performed under local anesthesia. The preaponeurotic fat, soft tissue, tarsal plate, and aponeurosis of the levator palpebrae superioris all appeared normal. The patient underwent maximal resection of the levator palpebrae superioris muscle and the blepharoptosis was alleviated two weeks after the operation. J Korean Ophthalmol Soc 2011;52(5):624-627
안와골절정복술 시 사용된 에피네프린이 동공크기에 미치는 영향에 대한 고찰
유성광,안민,Seong-Kwang Ryu,Min Ahn 대한안과학회 2011 대한안과학회지 Vol.52 No.6
Purpose: To evaluate the effect of epinephrine on pupil size in reconstruction of an orbital wall fracture. Methods: The authors of the present study describe 27 patients (27 eyes) who had reconstruction of an orbital wall fracture from January to July of 2009. Patients were divided into two groups according to the use of epinephrine during surgery. Preoperative and postoperative pupil sizes, operation times, and epinephrine dosages were collected. Results: Preoperative pupil sizes were 1.80 ± 0.37 mm, 1.74 ± 0.36 mm and postoperative pupil sizes were 1.97 ± 0.43 mm (p = 0.042), 2.18 ± 0.52 mm (p = 0.003) in the group with of epinephrine and the group without epinephrine, respectively. Postoperative pupil size significantly increased in all groups. However, no significant difference was found regarding change in pupil size after surgery (p = 0.258). In the group with epinephrine, change in pupil size did not show a significant association with operation time (p = 0.228), nor did change in pupil size and epinephrine dosage (p = 0.922). Conclusions: The use of epinephrine is an effective modality for bleeding control and securing a clear view in orbital wall fracture reconstruction. J Korean Ophthalmol Soc 2011;52(6):653-657
Fabrication and analysis of nanoscale geometric structure on polymer substrate
유성광,고흥조,황영규 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Polymer substrates have been widely used for the development of flexible electronic devices. Recent research has focused on fabricating a geometric structure on the polymer substrate to provide the adhesive ability for wearable electronic devices. However, the behavior of the geometric structure does not seem to be well studied. In this research, we fabricated a nanoscale geometric structure with diverse diameters and lengths on a polymer substrate. We carried out mechanical analysis on the adhesion using the nano-structures together with demonstration of attachable electronic devices to show utility of this method.
HPLC-DAD-MS/MS를 이용한 금은화 생리활성 물질의 동시분석
유성광,전주은,강경원,강삼식,신종헌,Ryu, Sung-Kwang,Jeon, Ju-Eun,Kang, Gyoung-Won,Kang, Sam-Sik,Shin, Jong-Heon 대한약학회 2008 약학회지 Vol.52 No.6
A high-performance liquid chromatography (HPLC) with diode array detector (DAD) and electrospray ionization mass spectrometry (ESI-MS) was established for the simultaneous determination of chlorogenic acid (1), sweroside (2), luteolin-7-O-glucoside (3), (E)-aldosecologanin (4) and 3,5-dicaffeoylquinic acid (5) from Lonicera joponica flower buds. The optimal chromatographic conditions were obtained on an ODS column (5 ${\mu}m$, 4.6${\times}$150 mm) with the column temperature $25^{\circ}C$. The mobile phase was composed of (A) water with 0.1% formic acid and (B) acetonitrile with 0.1% formic acid using a gradient elution, the flow rate was 0.3 ml/min. Detection wavelength was set at 250 nm. All calibration curves showed good linear regression ($r^2$>0.994) within test ranges. The developed method provided satisfactory precision and accuracy with overall intra-day and inter-day variations of 0.05${\sim}$1.95% and 0.15${\sim}$2.26%, respectively, and the overall recoveries of 97.71${\sim}$103.65% for the five compounds analyzed. The verified method was successfully applied to quantitative determination of the three types (phenolic compounds, iridoids and flavonoids) of bioactive compounds in 21 commercial L. japonica flower buds samples from different markets in Korea and China. The analytical results demonstrated that the contents of the five analytes vary significantly with sources.
HPLC-DAD-ion trap-MS를 이용한 인동 생리활성 물질의 동시분석
유성광(Sungkwang Ryu),원태형(Tae Hyung Won),강삼식(Sam Sik Kang),신종헌(Jongheon Shin) 대한약학회 2010 약학회지 Vol.54 No.3
A high-performance liquid chromatography (HPLC) with DAD detector and electrospray ionization mass spectrometry (ESI-MS) was established for the simultaneous determination of coniferin (1), loganic acid (2), demethylsecologanol (3), sweroside (4) and loganin (5) from caulis Lonicera joponica. The optimal chromatographic conditions were obtained on an ODS column (5 μm, 4.6×150 mm) with the column temperature 35oC. The mobile phase was composed of (A) water with 0.1% formic acid and (B) methanol with 0.1% formic acid using a gradient elution, the flow rate was 0.3 ml/min. Detection wavelength was set at 254 nm. All calibration curves showed good linear regression (r2>0.998) within test ranges. The developed method provided satisfactory precision and accuracy with overall intra-day and interday variations of 0.16~3.28% and 0.14~1.99%, respectively, and the overall recoveries of 99.39~105.89% for the five compounds analyzed. The verified method was successfully applied to quantitative determination of the two types (phenolic compounds and iridoids) of bioactive compounds in 24 commercial caulis L. japonica samples from different markets in Korea and China. The analytical results demonstrated that the contents of the five analytes vary significantly with sources.
3D electronic device achieved by thermally-induced shape memory effect of thermoplastic framework
장훈수,유성광,고흥조 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Three dimensional (3D) electronic devices such as curvilinear image sensor, omnidirectional antenna, and robotics gives a lot of possibilities for sensing and acting like biologically evolved systems. In terms of manufacturing technology of 3D electronics, membrane-type electronics and shape-morphing provides possibility of using silicon-based technology. In particular, thermoplastic framework generated by fused deposition method enables automatic transformation by thermallyinduced shrinkage. The related issue is shape control into a desired form with mechanical stability. In this work, we demonstrate 3D electronic device using a thermoplastic framework. The shape control is carried out by adjusting geometric parameters of framework. Moreover, mechanical analysis with computer simulation shows stability of metal electrode during thermal transformation. Finally, we also demonstrate 3D electronics using the transformable framework to show the feasibility of this technology.
마이토마이신씨에 의해 유도된 인간 테논낭 섬유아세포의 자가포식현상
박찬희,박래길,유성광,이동욱,Channy Park,PhD,Raekil Park,MD,PhD,Seong Kwang Ryu,MD,Dong Wook Lee,MD,PhD 대한안과학회 2011 대한안과학회지 Vol.52 No.11
Purpose: The present study investigated whether an autophagic process is involved in the apoptotic death of human tenon’s capsule fibroblasts (HTCFs) caused by mitomycin-C. Methods: An autophagic phenotype was tested using fluorescence microscopy and flow cytometry with specific biological staining dyes including monodansylcadaverine and acridine orange and microtubule-associated protein 1 light chain 3 (LC3). Results: Treatment with mitomycin-C (0.4 mg/ml) increased the acidic vesicular organelles of tenon’s capsule fibroblasts in a time dependent manner. Mitomycin-C induced both LC3-II cleavage and beclin-1 expression. 3-MA, a pharmacological inhibitor of autophagy, inhibited the mitomycin-C induced increase of acidic vesicular organelleS. Conclusions: Autophagy was induced with 0.4 mg/ml mitomycin-C in tenon’s capsule fibroblasts. And, autophagic mechanisms may be involved in the early stage of apoptosis of fibroblasts. J Korean Ophthalmol Soc 2011;52(11):1337-1343