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서지흔(Ji-Heun Seo),Malkeshkumar Patel,남상은(SangEun Nam),이기범(Kibum Lee),김준동(Joondong Kim) 대한전기학회 2021 전기학회논문지 Vol.70 No.4
High-performing transparent heater was achieved by using silver nanowires (AgNWs). The AgNWs were networked through spin coating method. In order to protect AgNWs from deformation according to heating operation, a functional metal oxide (ZnO) was coated over the AgNWs. To preserve the optical transparency, FTO-coated glass was adopted as the substrate. The transparent heater has a structure of ZnO/AgNWs/FTO/glass has more than 70% transmittance at the wavelength of 550 nm. The heating temperature of the transparent heater was reached over 300℃. The functional ZnO coated AgNWs transparent heater was stable for the thermal-cyclic operation, meanwhile, the bare AgNWs heater showed unstable and fluctuation in heating temperature. The stable operation of the transparent heater was demonstrated for the excellent water evaporation function, demisting and deicing performances. This high transparent heater has high potential to be applied for windows of transportation vehicles and buildings.
Ji Heun Jeong,Seung Eun Lee,Jeong Hoon Lee,Hyung Don Kim,Kyung-Hae Seo,Dong Hwi Kim,Seung Yun Han 대한해부학회 2020 Anatomy & Cell Biology Vol.53 No.2
Dementia is the common neurodegenerative disorder affecting the elderly, with a progressive cognitive decline and memory loss. Since Alzheimer’s disease (AD) and vascular dementia (VD) share key pathologies including oxidative damage, oral supplement of phytochemical medicines, which are well-known for their antioxidant properties, can be a viable therapy for both types of dementia. In this study, the therapeutic potential of the Aster ageratoides extract (AAE), an oriental drug with multiple medicinal properties, was tested on experimental rat models of AD and VD. After confirming the in vitro attenuation of neuronal excitotoxicity by AAE, rats were orally administered with AAE for 7 days and subsequently tested under 2 different experimental paradigms: efficacy screening against #1 AD and #2 VD. For paradigm #1, the rats received intraperitoneal scopolamine and subsequently underwent 3 different behavior tests i.e., the Y-maze, novel object recognition, and passive avoidance tests. For paradigm #2, the rats were operated with the 2-vessel occlusion and hypovolemia (2VO/H) technique, and at postoperative day 7, their hippocampal neuronal viability and the neuroinflammatory changes were quantified. The results showed that the scopolamine-induced impairment of memory performance was significantly improved by AAE intake. Furthermore, while the 2VO/H operation induced marked hippocampal neuronal death and microglial activation, both these effects were significantly attenuated by AAE supplements. Some of the aforementioned effects of AAE intake were dose-dependent. These results provided evidence that AAE supplements can exert anti-AD and -VD efficacies and suggested that AAE might be used as an edible phytotherapeutic for the 2 major types of dementia.
Treatment of nevus of Ota using Low fluence Q-switched Nd:YAG laser
( Heun Joo Lee ),( Hyun Min Seo ),( Sang Hyeon Hwang ),( Yoon Hwan Kim ),( Joon Hong Min ),( Joon Lee ),( You Jin Yang ),( Seung Jae Lee ),( Ji Hye Park ),( Chong Won Choi ),( Ga Young Lee ),( Soo Hon 대한피부과학회 2012 대한피부과학회 학술발표대회집 Vol.64 No.3
P081 : A clinical study of skin diseases on the anogenital areas
( Heun Joo Lee ),( Jung In Kim ),( Jung Min ),( Hyun Min Seo ),( Sang Hyeon Hwang ),( Yoon Hwan Kim ),( Joon Hong Min ),( Joon Lee ),( Seung Jae Lee ),( Ji Hye Park ),( Ga Young Lee ),( Soo Hong Park 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: Skin diseases on the anogenital areas cause sexual and functional problems, and these problems are important to most patients, so awareness of these disease entities is very important. Objectives: This study was performed to investigate the epidemiological aspects of skin diseases on anogenital areas that were confirmed by biopsies, and we wanted to highlight the clinical features of dermatoses of the anogenital areas. Methods: We retrospectively reviewed the data of 132 patients with anogenital lesions and these lesions were confirmed by biopsy at Kangbuk Samsung Hospital between January 2008 and June 2013. Results: The ratio of males to females was 104:28. The most frequent anogenital skin diseases of men were condyloma acuminatum(26%), epidermal cyst(9%), calcinosis cutis(7%), extramammary paget`s disease(7%), and the most frequent anogenital skin diseases of women were condyloma acuminatum(25%), Behcet`s disease(18%), epidermal cyst(11%). Of the 132 cases, 81 had papules or nodules, 32 had patches or plaques, and 19 had vesicles, erosions or ulcers. Conclusion: We retrospectively studied 132 cases of anogenital skin diseases. This study suggests that various conditions, including sexually transmitted infections, neoplasms, ulcerative disorders, and inflammatory dermatoses, can affect the anogenital areas and show different characteristics according to the diagnosis. These diseasespecific characteristics may be helpful to diagnosis before histopathological confirmations.
( Heun Joo Lee ),( Jung In Kim ),( Jung Min ),( Hyun Min Seo ),( Sang Hyeon Hwang ),( Yoon Hwan Kim ),( Joon Hong Min ),( Joon Lee ),( Seung Jae Lee ),( Ji Hye Park ),( Ga Young Lee ),( Soo Hong Park 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: To reduce the signs of aging, many different laser and other light-based systems have been developed and evaluated for their ability. Objectives: This study was designed to evaluate the effects of the novel grid fractional radiofrequency (GFR) treatment on skin structure and collagen production in vivo. Methods: The GFR device was used to deliver radiofrequency (RF) energy to skin. To compare the effects of different energy level, we used two different parameters, 84W and 200W for 2 seconds. The wound healing response was evaluated histologically and by RT-PCR up to 10 weeks post-RF treatment. Changes of diameter of collagen fiber were assessed by electron microscopy. Results: Dermal thickness, cellularity, and elastin content increased. RT-PCR studies revealed an immediate increase in IL-1b, TNF-a, and MMP-13 while MMP-1, HSP70.2, HSP47, and TGF-b levels increased by 2 days. We also observed a marked induction of tropoelastin, fibrillin, as well as collagen type 1 and 3 by 28 days post-treatment. Conclusion: Our study revealed a vigorous wound healing response is initiated post-treatment with progressive increase in inflammatory cell infiltration from day 2 through 10 weeks. Furthermore, we successfully demonstrated for the evidence of profound neocollagenesis and neoelastogenesis following RF treatment of human skin. The combination of neoelastogenesis and neocollagenesis induced by treatment with the GFR system may provide a reliable treatment option for skin laxity and rhytids.
P359 : Eosinophilic cellulitis in a myasthenia gravis patient
( Heun Joo Lee ),( Ju Yeon Choi ),( Han Saem Kim ),( Jung In Kim ),( Jung Min ),( Hyun Min Seo ),( Sang Hyeon Hwang ),( Yoon Hwan Kim ),( Ho Joo Jung ),( Ji Hye Park ),( Ga Young Lee ),( Won Serk Kim 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.1