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저차원 나노 소재 기반 다기능 전자파 차폐 및 센싱 응용기술
민복기,이윤식,탐반누엔,슈브라몬달,최춘기,Min, B.K.,Yi, Y.,Nguyen, V.T.,Mondal, S.,Choi, C.G. 한국전자통신연구원 2020 전자통신동향분석 Vol.35 No.4
With the widespread use of high-performance electronics and mobile communications, electromagnetic interference (EMI) shielding has become crucial for protection against malfunctioning of electronic equipment and harmful effects to human health. In addition, smart sensor technologies will be rapidly developed in untact (non-contact) environments and personal healthcare fields. Herein, we introduce our recently developed technologies for flexible multifunctional EMI shielding, and highly sensitive wearable pressure-strain and humidity sensors realized using low-dimensional nanomaterials.
남성형 탈모증 환자에서 시행한 모속이식술 52예에 대한 치료효과 분석
민복기,황성주,김도원,정상립,김정철,나건연 ( Pok Kee Min,Sung Joo Hwang,Do Won Kim,Sang Lip Chung,Jung Chul Kim,Gun Yoen Na ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.5
Background: There have been numerous methods to treat androgenetic alopecia but few methods to treat it effectively and permanently. Objective : The purpose of this study was to evaluate bundle hair grafting as an effective treatment for patients with androgenetic alopecia. Methods : Bundle hair grafiing was performed on 52 patients with androgenetic alopecia who had visited the department of dermatology, Kyungpook National University Hospital and Fatima Hospital. Questionaires regarding cosmetic satisfaction, side effects and general efficacy were recorded by patients themselves one year after hair grafting. Results : The results are as follows : 1. The loss of transplanted hair was most common during the third week(48.1%) after hair grafting. 2. The regrowth of the hair on the recipient site was most common during the 4th month(59.6 %) after the hair graft. 3. Bundle grafting afforded excellent cosmetic satisfaction even after one session in the alopecic area, 4. Facial edema, temporary sensory loss on the donor site, folliculitis and small pitted scarring were seen 19.2%, 5.8%, 1.9% and 3.8% of patients, respectively. 5. The disadvantages were the time necessary to carry out the procedure and the need for an experienced operator and assistants. Conclusion : We concluded that bundle hair grafting was an effective and safe therapeutic method for patients with androgenetic alopecia. (Korean J Dermatol 1997;35(5): 893-901)
카드늄을 처리한 미나리 (Oenanthe javanica)에서 전체 Thiol 잔기 , 글루타치온 , Phytochelatin의 농도 변화
민복기,최순용,이세영 ( Bokkee Min,Soon Yong Choi,Se Yong Lee ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.3
In order to evaluate the usefulness of O. javanica for the phytoremediation, it was grown for 1, 3, 7, 14, 21 days and was exposed to 50 μM of CdCl₂ in hydroponic medium after 3 weeks. Its biomass and contents of chlorophylls were analyzed. The growth of O. javanica showed little difference between cadmium treated and non-treated groups, while its contents of chlorophylls of Cd-treated group decreased up to 50% compared to the case of non-treated group. Its accumulated cadmium concentrations were 2.1, 7.3 and 113 μmoles Cd/g dry weight in the leaf, stem and root, respectively. The total contents of thiol increased 0.5, 1 and 7 times in the leaf, stem and root, respectively, while the contents of glutathione tended to decrease by 43%, 70% and 47% in the leaf, stem and root, respectively. Using HPLC analysis, the reasonable peaks of thiol compounds in shoot and root of Cd-treated sample were compared to those of non-treated sample in O. javanica, and found to be phytochelatins. In case of Nicotiana tabacum cv. Xanthi tested as control plant, the cadmium treatment for 3 weeks resulted in the decrease of both biomass and chlorophyll up to 70% and 75%, respectively. The roots of tobacco became rotten and eventually died. These results suggested that Oenanthe javanica is cadmium-tolerant hyperaccumulator.
민복기,김성준,이윤식,최춘기,Min, B.K.,Kim, S.J.,Yi, Y.,Choi, C.G. 한국전자통신연구원 2018 전자통신동향분석 Vol.33 No.1
Tactile sensors, which are commonly referred to as pressure and strain sensors, have been extensively investigated to meet the demands for attachable and wearable electronics for monitoring the health status or activity of human users. For this purpose, the introduction of two-dimensional (2D) materials such as graphene and transition metal dichalcogenides (TMDs) with high mechanical strength at the atomic scale is very suitable for tactile sensors applicable for use in human-friendly devices. In this paper, we examine a descriptive summary of a tactile sensor and review state-of- the-art research trends of 2D material-based tactile sensors in terms of the material and architecture. Finally, we propose a roadmap for future studies into advanced tactile sensors based on our ongoing research.
Bromoxynil 특이성 Nitrilase 유전자를 이용한 제초제 저항성 형질 전환 식물의 분자육종
민복기(Bok Kee Min),박은성(Eun Sung Park),박연홍(Yearn Hung Park),송재영(Jae Young Song),이세영(Se Yong Lee) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.4
Bromoxynil is an antidicot herbicide widely used on cereal crops and has a short half life in the soil. A bxn gene, encoding a specific nitrilase that converts bromoxynil to its primary metabolite 3,5-dibromo-4-hydroxybenzoic acid, was inserted in plant binary vector pGA482, and then introduced into tobacco and lettuce plants via Agrobacterium mediated leaf-disc transformation method. Transgenic plants with the bxn gene were selected by kanamycin and regenerated to whole plants. The regenerated transgenic, plants were determined level of expression of bxn gene by Northern blot analysis. Leaf-disc analysis and pot-assay confirmed that the transgenic tobacco and lettuce plants were resistant to high doses of bromoxynil.
민복기(Bokki Min),김재구(Jaegu Kim),조성학(Sunghak Cho),최두선(Doosun Choi),황경현(Kyunghyun Whang) 한국레이저가공학회 2008 한국레이저가공학회 학술대회 논문집 Vol.2008 No.-
This paper presents the method to fabricate a roll mold with microstructure using DPSS(diode pumped solid-states) UV laser. DPSS laser ablation makes it possible to micromachine by controlled energy density and pulse repetition rate of laser. But, In case of metal ablation, molten debris is caused by thermal damage. Hence, We suggest the process of the ablation of a photoresist(PR) coated on roll mold. And we design a roll coater for laminating the photoresist onto the curby surface of a copper roll mold. The microstructure on roll mold is fabricated by controlled laser pulse energy, pulse repetition rate, rotation speed and rotation number of roll. We compare and analyze the quality of microstructure by the wet etching process with the quality by the direct write process.