http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
진용현,황태일 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
고분자는 산업 전반에 활용되고 있는 중요 소재로써 경량성, 강인성, 유연성 등 각각의 고분자 특성들을 잘 나타내어 섬유, 플라스틱, 고무 등 산업 전반에 응용되고 있다. 이러한 고분자의 특성 중 하나는 전기가 흐르지 않는 절연체라는 것이다. 따라서 전기적 분야에 응용 한계를 보여왔다. 1977년에 전기가 통하는 고분자가 나오고 2000년에 노벨화학상을 수상하며 전도성 고분자 시대가 열리게 되었다. 현재 Antistatic용부터 투명전극용까지 활용되어 지고 있으며, 투명전극(터치스크린, 스마트창, e-paper, solar cell 등), 전지( Capacitor, battery 용 등), 섬유용, 전극용 접착제, Bio Sensor 등 전도성 고분자의 개발 및 그 응용분야는 점점 확대되고 있다.
회맹장 및 대장을 침범한 장 결핵에 있어서 바륨을 이용한 방사선 이중조영촬영 소견에 대한 연구
진용현,전혜정,이용근,강철호,조성범,김윤환,박철민,차상훈,김일영,이혜경 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-
To determine the characteristic double contrast barium enema findings of ileo-cecal and colonic tuberculosis and to make differential diagnosis from other bowel inflammatory disease. Sixty-seven patients confirmed as ileo-cecal and/or colonic-tuberculosis in six hospitals were evaluated retrospectively. The diagnosis was proven by endoscopic biopsy, surgery, and clinical follow up. Nine of 67 patients were excluded because radiologic findings were normal though endocopic biopsy examinations resulted in tuberculosis. Histopathological diagnosis were madein 58 cases as follows: endoscopic biopsy(n=29), operation(n=12), follow up examination(n=14), tissue culture(n=1), laparoscopic biopsy(n=2). There were 30 men and 28 females. The mean age were 36 yrs(range:16-67), 34 patients were in the second and third decade. The distribution of lesions, morphological characteristics, mucosal changes, ulcer shape and depth, associated with other tuberculous lesion, multiplicity were retrospectively analyzed in the findngs of double contrast barim enema. The commonest clinical symptoms were abdominal pain(n=35, 60%) and diarrhea(n=18, 31%). The chest radiography revealed association of pulmonary tuberculosis in 39 cases. Tuberculous lesions of other organs except chest were present in five cases. Double contrast barium enema findings showed a thickening and irregularity of intestinal mucosal fold(n=29, 50%), bowel contraction and/or shortening(n=26, 45%). There were small, nodular, superficial ulcers in the case of ulcer depth less than 2 mm in the depth. As many as 39 cases(67%) in this series had two or more lesions in the intestinal tuberculosis. The involved segment revealed symmetrical feature(n=21, 36%). Inflammatory pseudopolypoid lesions were noted in 30 cases(52%). The ileo-cecal region was involved in 38 cases(66%). The ascending colon(n=25, 43%) was the second commonest site with or without contiguous cecal involvement. Lesions in terminal ileum, ileo-cecal valve, transverse colon, descending colon and appendix were seen in 19, 18, 18, 12 and seven cases, respectively. Among 18 cases of ileo-cecal valve lesions, there were incompetency in nine cases(16%) and wide gapping in four cases(7%). In 14 cases, tuberculous enterocolitis was diagnosed by clinical follow-up and double contrast barium enema study. 12 out of 14 cases, the findings of double contrast barium enema of tuberculous enterocolitis were normalized after anti-tuberculous medication. However, two cases showed more aggravated state than before due to inappropriate treatment. Double contrast barium enema plays an important role in the diagnosis of tuberculous enterocolitis, determines the type, site and extent of the involvement and helps in treatment guide by using sequential studies.
Synthesis and Characterization of w-Sulfonated Polystyrene-stabilized Cadmium Sulfide Nanoclusters
진용현,임승순,Jungahn Kim 한국고분자학회 2004 Macromolecular Research Vol.12 No.6
We report an important and useful method for preparing -sulfonated polystyrene-stabilized cadmium sulfide (CdS) nanoclusters. The -sulfonated polystyrene (Mn = 5000 g/mol) was prepared successfully through chain-end sulfonation of poly(styryl)lithium using 1,3-propanesultone; the resulting polymer was used successfully as a polymeric stabilizing agent for the preparation of semiconductor CdS nanoclusters by reduction of cadmium acetate in a mixture of toluene and methanol (9:1, v/v). The nanoclusters that formed were characterized by a combination of transmission electron microscopy, X-ray diffraction, and UV/Vis spectroscopic analysis. The -sulfonated polystyrene-stabilized CdS nanoclusters synthesized in this study exhibited the cubic phase (zinc-blende phase) structure in the range of 2~8 nm.
진용현(Yong Hyun Chin),김경태(Kyung Tae Kim),김석현(Suk Hyun Kim),양동범(Dong Beom Yang),홍기훈(Gi Hoon Hong),이광우(Kwang Woo Lee) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.4
To study the distribution and the behavior of trace metals in Kwangyang Bay, surface water samples were collected four times from August 1997 to May 1998 and were analyzed for trace metals (Cd, Co, Cu, Fe, Ni, Pb, Zn) by Atomic Absorption Spectrometer and Inductively Coupled Plasma Mass Spectrometer. Dissolved Co and Fe concentrations were comparatively high near the Seomjin River mouth. Particulate trace metal contents were relatively high near the Sueochun River mouth and near the Yeochun industrial complex. Distribution coefficients (K_d; Lkg¹) between dissolved and particulate phases of Fe, Pb, Co, Zn, Ni, Cu and Cd were 1.67×10^8, 1.37×10^6, 7.25×10^5, 4.43×10^5, 1.39×10^5, 9.1×10⁴ and 1.8×10⁴, respectively. In Kwangyang Bay, particulate trace-metal concentrations were as high as dissolved ones and showed seasonal and geographic variations.