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금속산화물 전극을 사용한 고 에너지밀도 하이브리드 커패시터 특성
윤홍진 ( Hong Jin Yoon ),신윤성 ( Yoon Sung Shin ),이종대 ( Jong Dae Lee ) 한국유화학회 2011 한국응용과학기술학회지 Vol.28 No.3
The electrochemical performances of an asymmetric hybrid capacitor were investigated using LiFePO4 as the positive electrode and active carbon fibers(ACF) as the negative electrode. The electrochemical behaviors of a nonaqueous hybrid capacitor were characterized by constant current charge/discharge test. The specific capacitance using LiFePO4/ACF electrode turned out to be 0.87 F/cm2 and the unit cell showed excellent cycling performance. This hybrid capacitor was able to deliver a specific energy as high as 178 Wh/kg at a specific power of 1,068 W/kg.
윤홍진 ( Hong Jin Yoon ),이창호 ( Chang Ho Lee ),이종대 ( Jong Dae Lee ) 한국유화학회 2011 한국응용과학기술학회지 Vol.28 No.2
The electrochemical characteristics of electric double layer capacitor(EDLC) were investigated using various carbon materials. The physical properties such as specific surface area and mean pore size of activated carbon were analyzed by BET. The results of the activated carbon used for electrode material showed that the specific surface areas varied from 600 to 1500 m2/g and mean pore sizes from 1.74 to 2.88 nm. A maximum specific capacitance of 0.30 F/cm2 was obtained for the activated carbon with the highest specific surface area and ionic conductivity. Also, it was found that the electrochemical results of the cyclic charge-discharge tests were stable.
내시경 유두절제술로 치료한 십이지장 주유두부의 신경내분비종양
윤홍진 ( Hong Jin Yoon ),정영학 ( Young Hak Jung ),최성은 ( Sung Eun Choi ),박정수 ( Jung Soo Park ),김용훈 ( Yong Hoon Kim ),김혜원 ( Hae Won Kim ),장성일 ( Sung Ill Jang ),이동기 ( Dong Ki Lee ) 대한췌장담도학회 2014 대한췌담도학회지 Vol.19 No.4
Ampullary neuroendocrine tumor is rare but requires total resection for treatment. Traditionally, pancreatic duodenal resection has been recommended for treatment of ampullary neuroendocrine tumor. Because of the morbidity and mortality associated with surgical resection, endoscopic papillectomy is increasingly used in selected cases with low grade, no metastasis, and no invasion of the pancreatic or bile duct. We present a case of an ampullary neuroendocrine tumor which was successfully and completely resected via endoscopic papillectomy. Endoscopic papillectomy can be a viable alternative for the resection of neuroendocrine tumor at the major duodenal papilla in cases with high surgical risks. Korean J Pancreatobiliary 2014;19(4):204-209
타이타늄 운동축을 삽입한 하이드록시아파타이트 안와삽입물의 합병증에 관한 임상 연구
홍진표,윤진숙,라상훈,이상렬,Jin Pyo Hong,Jin Sook Yoon,Sang Hoon La,Sang Yeul Lee 대한안과학회 2006 대한안과학회지 Vol.47 No.7
Purpose: To evaluate the complications of titanium motility pegged hydroxyapatite orbital implant. Methods: We retrospectively reviewed the records of 77 patients who underwent drilling with titanium motility peg hydroxyapatite orbital implant from May 2000 to April 2005. Results: Of 77 patients (77eyes), 22 complications in 14 eyes (18.2%) occurred: 8 cases of major discharge (10.4%), 7 cases of granulation tissue overgrowth (9.1%), 3 cases of sleeve head exposure (3.9%), 4 cases of peg extrusion (5.2%) and 2 cases of hydroxyapatite exposure around pegged hole (2.6%). Conclusions: Hydroxyapatite exposure around pegged hole was most infrequent among complications of titanium motility peg system. It is considered that the use of titanium motility pegs will increase, as a bioinert material.
김영한,안석민,서영준,윤종형,배은주,이홍진,Kim, Young Han,Ahn, Seok Min,Seo, Young Jun,Yoon, Jong Hyung,Bae, Eun Ju,Lee, Hong Jin 대한유전성대사질환학회 2016 대한유전성대사질환학회지 Vol.16 No.3
Mitochondrial disease is a group of disorders caused by dysfunctional mitochondria, the organelles that generate energy for the cell. Diagnosis of mitochondrial disease is difficult, subtle, and has many problems. It is more likely to miss the diagnosis of mitochondrial disease, especially in borderline cases where the symptoms of the disease are not severe. In this regard, urine organic acid analysis is noninvasive and can increase the sensitivity and specificity through repeated load test with few changes according to the specimen. And, It is considered to be suitable as a screening test for mitochondrial diseases because it has a great advantage of distinguishing from organic aciduria, urea cycle disorder and fatty acid oxidation disorder which may have similar symptoms. The purpose of this study was to investigate the clinical features and age distribution of mitochondrial diseases diagnosed by organic acid analysis and to establish the policy of diagnosis and treatment based on this study.
증례 : 감염 ; 마제신 환자에서 발생한 Enterococcus hirae 신우신염 1예
김기현 ( Ki Hyun Kim ),윤지현 ( Ji Hyun Yoon ),김태훈 ( Tae Hoon Kim ),윤홍진 ( Hong Jin Yoon ),천재영 ( Jae Young Cheon ),진성준 ( Sung Joon Jin ),송영구 ( Young Goo Song ) 대한내과학회 2014 대한내과학회지 Vol.87 No.3
Enterococcus hirae mainly causes infections in animals. It has been rarely encountered in humans and, in most such cases, it is considered to be a contaminant or resident flora. Since the first case of septicemia by E. hirae was reported in 1998, only two cases of acute pyelonephritis (APN) have been reported in Korea. We describe herein a case of APN caused by E. hirae in an 83-year-old man with a horseshoe kidney. Although E. hirae was isolated only from urine and not from the blood, we were able to diagnose it as the causative organism based on the patient`s clinical findings, imaging study results, and risk factors including old age, benign prostatic hypertrophy, and a horseshoe kidney. (Korean J Med 2014;87:369-372)
증례 : 감염 ; Mycobacterium massiliense 피부연조직 감염에서 완치한 1예
김태훈 ( Tae Hoon Kim ),윤지현 ( Ji Hyun Yoon ),진성준 ( Sung Joon Jin ),김기현 ( Ki Hyun Kim ),천재영 ( Jae Young Cheon ),윤홍진 ( Hong Jin Yoon ),송영구 ( Young Goo Song ) 대한내과학회 2014 대한내과학회지 Vol.87 No.4
Mycobacterium massiliense (M. massiliense) was identified recently as a species that separated from M. abscessus. Unlike M. abscessus, M. massiliense responds well to clarithromycin-based antibiotic treatment. Many cases of M. massiliense infections related to iatrogenic procedures have been reported. We report a case of skin and soft tissue infection by M. massiliense, which was not caused by medical appliances, that was treated successfully using clarithromycin monotherapy for -6 months after initial treatment with empirical antibiotics for 4 weeks. (Korean J Med 2014;87:510-513)