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( Hyunil Jang ),( Young-joo Jin ),( Cheol-woo Kim ),( Lucia Kim ),( Jin-woo Lee ) 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1
Aims: Bullous pemphigoid is a type of acute or chronic autoimmune disease that involves subepidermal skin lesions with bulla formation. Although viral infections, such as, human herpes virus (HHV), human immunodeficiency virus, cytomegalovirus, Epstein-Barr virus, HHV-6, hepatitis B virus (HBV), and hepatitis C virus (HCV) are known factors of bullous pemphigoid, HCV infection has only been rarely associated factor, especially in HBV endemic area. Methods: A case report Results: A 78-year-old man was admitted to our hospital due to erythematous bulla of onset 3 months prior to presentation affecting his entire body. Pathologic findings, that is, subepidermal bullae containing eosinophils and neutrophils with superficial perivascular lymphocytic and eosinophilic infiltration, were consistent with bullous pemphigoid. Anti-HCV was positive and HCV quantitative real-time PCR was 1.25x105 IU/Ml. HCV genotype was 2a. After a diagnosis of bullous pemphigoid associated with chronic HCV infection was reached, he was treated with oral methylprednisolone for bullous pemphigoid, and his skin lesions improved. Oral direct acting antiviral agents (sofosbuvir plus ribavirin) were prescribed for chronic hepatitis C, and sustained viral response was achieved. Conclusions: In conclusion, the authors report a rare case of bullous pemphigoid associated with chronic HCV infection in a HBV endemic area, and advise that HCV should be considered in the differential diagnosis of factors precipitating bullous pemphigoid, even in HBV endemic areas.
Analgesic Effect of Grape Seed Proanthocyanidin Extract in Fibromyalgia Animal Model
Hyunil Mun(문현일),Seong-Ho Kim(김성호),Tae Jung Jang(장태정),Il Soo Moon(문일수) 한국생명과학회 2010 생명과학회지 Vol.20 No.4
산성 식염수 쥐모델은 사람의 섬유근통에 근접한 모델로 제시되고 있다. 포도씨에서 얻은 oligomeric proanthocyanidin complexes (OPC)는 항산화제로 알려져 있다. 저자들은 산성 식염수 모델에서 통증 역치에 대한 OPC의 효과를 연구했다. 좌측 장딴지 근육에 pH 4.0의 산성 식염수 100 μl를 0일과 5일에 주사했다. 대조군은 pH 7.2의 생리 식염수를 같은 스케줄로 주사했다. 산성 식염수 그룹 10마리를 다시 두 그룹으로 나누어 한 그룹은 멸균 식염수, 다른 한 그룹은 OPC 300 ㎎/㎏를 복강 내 주사했다. 복강 내 주사 한시간 후 다시 통각에 대한 역치를 조사했다. 0일에 비해 7일에서 산성 식염수 모델은 기계적 과통각을 나타냈다(p<0.05). OPC 300 ㎎/㎏ 를 복강내 주사한 그룹에서 강력한 항통각 효과를 나타냈다(주사측 발바닥, p=0.001; 반대측 발바닥, p=0.002). 면역조직화학 염색상 복강내 식염수를 처치한 대조군에 비해 OPC 처치군에서 대뇌의 M1 및 M2 영역에서 산-감지 이온 통로3의 발현이 감소되었다(p<0.05). 사람의 섬유근통에서 OPC 치료의 효과를 보기 위한 연구가 향후 필요할 것으로 생각된다. The acidic saline animal model of pain has been suggested to mimic fibromyalgia (PM). Oligomeric proanthocyanidin complexes (OPC) from grape seeds are known to act as an antioxidant. We studied the effects of OPC on the pain threshold in the acidic saline animal model of pain. The left gastrocnemius muscle was injected with 100 μl of saline at pH 4.0 under brief isoflurane anesthesia on days o and 5. Control rats (n=5) received identical injections of physiological saline (pH 7.2) on the same schedule. Rats (n=10) with acidic saline injection were separated into two study subgroups. After measurement of pre-drug pain thresholds, rats were injected intraperitoneally with either saline or OPC 300 ㎎/㎏. Paw withdrawal thresholds to pressure were again measured 60 min after intra-peritoneal injection. Nociceptive thresholds were measured with a Dynamic Plantar Aesthesiometer by applying an increasing pressure to right or left hind paw until the rat withdrew the paw. Compared to baseline (day 0), acid injections produced mechanical hyper-responsiveness on day 7 (pre-drug) in these rats [p<0.05]. A potent antihyperalgesic effect was observed when rats were injected intra-peritoneally with OPC 300 ㎎/㎏ [injected paw, p=0.001; contralateral paw, p=0.002]. OPC treatment decreased the expression of acid sensing ion channel 3 in the brain motor cortex area on immunohistochemical staining when OPC 300 ㎎/㎏ was administered intraperitoneally in the animal model of FM pain [p<0.05]. Further research is required to determine the efficacy of OPC treatments in FM pain in humans.
다이나믹 프로그램밍을 이용한 HEV 의 최적 연비 비교
김현일(Hyunil Kim),공진형(Jin-hyung Kong),임원식(wonsic Lim),이장무(Jang-moo Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Dynamic Programming is one of the global optimization techniques used to develop optimal control strategies for HEVs. In this paper, we applied dynamic programming in deriving the maximum possible fuel economies of three types of vehicles, a diesel HEV. Honda Insight and Toyota Prius. The results from the optimizations were validated with the histories of control variables and the operating points of the power sources. We compared fuel economies from the optimizations with those from other researches.<br/>
다구찌 방법을 이용한 하이브리드 차량의 SOC 유지전략 최적화
김현일(Hyunil Kim),전순일(Soonil Jeon),박영일(Yeong-il Park),이장무(Jang-moo Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
We present new structure of SOC sustaining strategy for a charge sustaining hybrid electric vehicle (HEY), which can reflect the strategies for a mild HEV(Honda Insight) and a normal HEV(Toyota Prius). The proposed SOC sustaining strategy is composed of two steps to prevent over-charging or depleting of electric energy storage device such as NiMH. For this purpose, six SOC limits characterizing the SOC sustaining strategy are optimized through analysis of means (ANOM) in Taguchi's method. Besides, their relative effects on fuel economy are evaluated based on analysis of variance (ANOVA)
장명욱(Myungwook Jang),한상근(Sangkeun Han),윤재호(Jaeho Yun),손현일(Hyunil Shon) 한국추진공학회 2019 한국추진공학회 학술대회논문집 Vol.2019 No.5
혼합형 고체 추진제의 점도와 기계적 특성은 고체 산화제인 AP의 구형도에 크게 영향을 받는다. 190 ~ 200 ㎛의 크기의 AP와 5 ~ 7 ㎛의 크기의 AP를 사용한 HTPB/AP 추진제에서 190 ~ 200 ㎛의 크기의 AP의 입형이 구형에 가까울수록 추진제 점도 및 경시적 변화가 낮은 것으로 확인하였으며, 이는 AP가 구형에 가까울수록 추진제 내부에서의 베어링 효과로 작용되기 때문이다. AP의 구형도가 클수록 추진제의 연소 속도가 증가하는 경향이 나타났다. 추진제의 낮은 점도와 안정된 연소속도를 동시에 고려할 때, 2.0(비표면적 측정 기준) 이하의 구형도를 가진 AP를 사용하는 것이 가장 효과적인 것으로 분석되었다. The viscosity and mechanical property of composite solid propellant are profoundly affected by sphericity of AP. In HTPB/AP propellant fomulated by two mode of AP size such as 190 ~ 200 ㎛ and 5 ~ 7 ㎛, the propellant was found to be much less viscose at end of mix when be nearly sphere of AP is effected of bearing in propellant. It was shown that the strand burner test for HTPB/AP propellant with the increased in sphericity of AP. Considering both lower viscosity and stable rate of burning, the optimum sphericity of AP was estimated to be 2.0(measured to specific surface area)
Kim, Minha,Jang, Yong-Jun,Jung, Ho-Sung,Song, Woochang,Kang, Hyunil,Kim, Eung Kwon,Kim, Donguk,Yi, Junsin,Lee, Jaehyeong American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.5
<P>Aluminum-doped zinc oxide (AZO) thin films were deposited on glass and polyimide substrates using radio frequency magnetron sputtering. We investigated the effects of the oxygen gas ratio on the properties of the AZO films for Cu(In, Ga)Se-2 thin-film solar cell applications. The structural and optical properties of the AZO thin films were measured using X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and UV-Visible-NIR spectrophotometry. The oxygen gas ratio played a crucial role in controlling the optical as well as electrical properties of the films. When oxygen gas was added into the film, the surface AZO thin films became smoother and the grains were enlarged while the preferred orientation changed from (0 0 2) to (1 0 0) plane direction of the hexagonal phase. An improvement in the transmittance of the AZO thin films was achieved with the addition of 2.5-% oxygen gas. The electrical resistivity was highly increased even for a small amount of the oxygen gas addition.</P>