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Design of Bio-Inspired Morpho Butterfly Structures for Optical Sensor Applications
김현명(Hyeon Myeong Kim),이길주(Gil Ju Lee),김민석(Min Seok Kim),김규정(Kyu Jung Kim),송영민(Young Min Song) Korean Society for Precision Engineering 2016 한국정밀공학회지 Vol.33 No.5
Various species of insects display vivid colors, widely known as ‘structural color’ due to their optical interference. Morpho butterflies are famous for their brilliant iridescent colors, which arise from the photonic-nanostructures of optical interference on their wings. In this paper, we outline the results of a comparative study of the optical properties of bio-inspired Morpho butterfly structures with the widely known Distributed Bragg Reflector (DBR), conducted using a rigorous coupled-wave analysis (RCWA) method for the two structures. Almost analogous tendencies were observed for both Morpho and DBR structures. With variation in the surrounding media, however, Morpho structures showed an obvious peak shift while no significant changes were observed in DBR, which can be applicable.
Production of Biodiesel in Yarrowia lipolytica by Truncation of Wax Ester Synthase
Hyeon-Min PARK,Xiaoyu SHI,Myeong-Eun LEE,Sung Ok HAN 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
Research about the production of biofuels has been carried out world widely because of many environmental issues and economic competitiveness. Among biofuels, biodiesel established one of successful examples, which produce fatty acid methyl/ethyl esters (FAMEs/FAEEs) by wax ester synthase from Marinobacter hydrocarbonoclasticus (MhWS). In this study, we enhanced production of FAEEs in Yarrowia lipolytica by abolishing the DUF 1298 motif of MhWS. This resulted in 152.3 ㎎/L of extracellular FAEEs. To secure enough cell growth, ethanol was inducted in the late exponential phase and the amount of extracellular FAEEs increased to 757.64 ㎎/L. Also, further integration of biotin carboxylase gene improved the production of FAEEs, which produced 849.81 ㎎/L. Furthermore, the addition of LiOAC caused the increase of secretion, which resulted in 940.40 ㎎/L of extracellular FAEEs. Finally, we optimized culture system to get more cell growth and glucose uptake. As a result, total production of FAEEs reached to 2.37 g/L at 120h. This study can show progression to the production of biodiesels, which can offer another strategy to construct culture system.
( Hyeon Myeong Hong ),( Joong Sub Choi ),( Jaeman Bae ),( Won Moo Lee ),( Jeong Min Eom ),( Jihyun Keum ) 대한산부인과학회 2020 대한산부인과학회 학술대회 Vol.106 No.-
Objective: To analyze the efficacy and safety of the WOMEN CARE(SJ global, bucheon). Methods: This study is conducted by randomized controlled trial of 20 patients with Women care(Tap water) and 22 patients with control group(Dressing with Povidone iodine) from September 1, 2019 to Febrary 28, 2020 in Hanyang University Hospital. Each group patients were visited our center four times. At first visit(VISIT 1), patients were examed of STD 12 and cervical culture. About 7 days later(VISIT 2), they were visited and grouped by Women care or povidone iodine dressing by randomized selection. They were dressing by each method. After 2 days later(VISIT 3) from VISIT2, cervical culture was done. After 2 days later(VISIT4) from VISIT3, cervical culture was done finally. Results: There were no significant differences in demographic and clinical characteristics between the two groups. We compared the results of cervical culture gram positive bacteria at VISIT 1 and VISIT3. The quantitative decrease of bacteria was seen the 6 patients of 20 patients in WOMEN CARE group. In the control group, The quantitative decrease of gram positive bacteria was seen the 5 patients of 22 patients. Conclusion: By this study, there was no significant side effect of WOMEN CARE; Vaginal itching sensation, redness and burning sensation. We confirmed the safety and efficacy of the WOMEN CARE.
( Hyeon-myeong Yang ),( Ji-hwan Cha ),( Min-ji Kim ),( Byeong-chang Park ),( Hang-bae Jun ) 한국폐기물자원순환학회 2022 ISSE 초록집 Vol.2022 No.-
Municipal solid waste(MSW) have been continuously increased as urbanization progresses rapidly. The highest proportion of MSW is food waste, and the importance of recycling food wastes is increasing. Recycling methods of food waste are feedstuff, composting and biogasification. Among them, biogasification, a carbon-neutral recycling method, is attracting attention. However, biogasification, that is, anaerobic digestion(AD), needs to improve the low process stability and organic matter decomposition rate, etc., and bioelectrochemical anaerobic digestion(BEAD) can improve the above problems by supplying a small amount of voltage. But, most of the experiments on BEAD were conducted on the lab scale, and the performance verification on a larger scale was not performed. Therefore, this study tried to perform performance verification of BEAD on bench scale. The reactor was composed of AD and BEAD reactors. Working volume of both reactors is 100 L. BEAD reactor was composed of a main reactor and a small reactor including electrodes, and both reactors were connected. The operation was performed under the conditions; organic load rate of 4 kg/㎥/d, HRT of 20 days, and temperature of 35°C. Additional, a voltage of 0.4 V was supplied to the BEAD. The results of the experiment showed that the average amount of organic removal was 5,800 mg-COD/L and the average amount of methane generation was 35 L/d higher than that of AD. In addition, the energy efficiency of BEAD was calculated by comparing BEAD and AD, and the average was 290%. Therefore, in this study, it was confirmed that the rapid organic removal and methane generation were performed even when BEAD was applied at the bench scale, and effective energy recovery was achieved by a small amount of voltage supply.
Laparoscopic primary repair of gastric perforation caused by umbilical trocar insertion
( Hyeon Myeong Hong ),( Joong Sub Choi ),( Jae Man Bae ),( Won Moo Lee ),( Un Suk Jung ),( Jeong Min Eom ) 대한산부인과학회 2019 대한산부인과학회 학술대회 Vol.105 No.-
Objective: Present an unusual case Target: Adanced practicioners Methods: Background and Aims: We present a case of iatrogenic gastric perforation caused by umbilical trocar insertion with subsequent laparoscopic primary repair. Design: Case study. Patients: A 58-year-old Korean woman with no history of abdominal surgery was scheduled to undergo a laparoscopic assisted vaginal hysterectomy for myoma ureti. Interventions: Laparoscopy. Results: A 58-year-old Korean woman had a laparoscopic assisted vaginal hysterectomy on June 26, 2019. During abdominal entry, a 5-mm trocar was then placed by direct trocar insertion method, but introduction of the laparoscope revealed that it had been placed within the lumen of the stomach. We inserted nasogastric tube to remove gas and liquid from the stomach. The stomach perforation, which had been marked by leaving the original trocar in place and appeared to be an 5-mm clean injury with minimal bleeding The perforation site was repaired laparoscopically with 2-0 vicryl sutures, using intracorporeal interrupted full-thickness suture. Her nasogastric tube was removed on postoperative day one. The patient did well postoperatively and recovered without complications. Conclusion: Our experience indicate that laparoscopic primary repair of gastric perforation caused by umbilical trocar insertion is safe and feasible.
( Myeong Hyeon Yang ),( Ji Yun Jang ),( Joon Hee Kim ),( Kang Hoon Lee ),( Hyun Hwangbo ),( Min Soo Jang ),( Kee Suck Suh ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.2
Background: Granulomatous rosacea (GR) is a variant of rosacea. Ultraviolet radiation (UVR) is considered to be etiologically related to GR, but its pathogenesis still remains unclear. Although, recent studies suggested that transient receptor potential vanilloid (TRPV) and mast cells are involved in the pathogenesis of rosacea, their role in each variants of rosacea such as GR has not been reported. Objectives: To investigate immunohistochemical expression of MMP-1, -9, TRPV, and CD117 in the GR compared with the non-granulomatous rosacea (NGR) and to test the hypothesis that immunohistochemical expressions of GR would relate with UVR. Methods: Biopsy samples were obtained from 11 patients of GR and 11 patients of NGR. For the analysis, subjects in two groups were age-matched. The sections were stained using hematoxylin and eosin, and antibodies MMP-1, -9, TRPV, and CD117. And expression of antibodies was evaluated with a semi-quantitative scale. Results: The expression of MMP-1, -9, and TRPV was significantly increased in GR lesions compared with NGR lesions (p < 0.05), especially at the center of granulomas. CD117 expression was increased in GR lesions, although difference between the two groups was not statistically significant. Conclusion: We suggest that, in GR lesions, TRPV is associated significantly with granuloma formation as well as MMP-1, -9 in relation to UVR exposure, and mast cells may play an important role in this process.