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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 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.
Primary leiomyoma of the ovaries in a dog
Hyeon-Wook Lee, Kyung-Ku Kang, Chang-Woo Min, Ah-Young Kim, Eun-Mi Lee, Eun-Joo Lee, Myeong-Mi Lee, Sang-Hyeob Kim, Soo-Eun Sung, Kyu-Shik Jeong 충북대학교 동물의학연구소 2014 Journal of Biomedical and Translational Research Vol.15 No.1
We would like to report a case of leiomyoma of the ovaries in a dog. Leiomyoma is commonly seen in the vagina in dogs. However, it is a very rare neoplasm in the ovaries. As there have only been a few reported cases, this report provides valuable information on veterinary medicine and pathology. Masses found in the ovaries need to be differentiated from other ovarian tumors. Therefore, we describe the gross, histopathological, and immunohistochemical features of a case of ovarian leiomyoma in a 10-year-old female Yorkshire Terrier dog. The mass on the right of the uterus was found accidentally by pelvic ultrasonography. Laparatomy revealed a large multi-nodulated ovarian mass. Grossly, cut surfaces of the mass showed multiple firm whitish nodules in the cortex and bloody loose connective tissue in the medulla. Histopathologically, the cortex of the mass was composed of spindle cells forming interlacing fascicles. The cells had elongated, blunt-ended nuclei and eosinophilic cytoplasm as detected by hematoxylin and eosin staining. Immunohistochemical stained sections were immunoreactive for α-smooth muscle actin and desmin but negative for vimentin and S-100. Therefore, differential diagnosis confirmed leiomyoma based on morphology and positive staining for α-smooth muscle actin and desmin.
( 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.
A Case of Idiopathic Aortitis with Left Renal Vein Thrombosis
Hyeon Jeong Yun,Jin Uk Jeong,Jong Ho Shin,Jin Ho Choi,Young Min Na,Jin Cheol Myeong,Ki Tae Bang 순천향대학교 순천향의학연구소 2014 Journal of Soonchunhyang Medical Science Vol.20 No.2
A 38-year-old man was admitted to the hospital because of abrupt left flank pain. He had no fever and physical examination revealed tenderness of the left costovertebral angle. Laboratory data revealed white blood cell 16,060/μL, C-reactive protein 0.93 mg/ dL. Urinalysis showed more than 1/2 red cells per high-power field with severe proteinuria (4+). Enhanced computed tomography (CT) showed the thickened abdominal aorta wall with partial thrombus. The thickened aorta wall compressed the left renal vein and it caused left renal vein thrombosis. Abdominal CT findings suggested aortitis of the abdominal aorta with complication of left renal vein. We could exclude other types of aortitis including autoimmune aortitis, Takayasu’s arteritis, giant cell arteritis, and infectious causes based on a serologic test and the history of the patient. Therefore, the patient was diagnosed with idiopathic aortitis and treated with glucocorticoid. After treatment, his symptoms disappeared and a follow-up CT showed decreased mural thickening of the abdominal aorta. Isolated idiopathic aortitis presented with renal vein thrombosis is extremely rare and has not been reported in Korea yet. We present a rare case report on idiopathic aortitis of the abdominal aorta with complication of left renal vein thrombosis.