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A Case of Pyogenic Liver Abscess Caused by Staphylococcus epidermidis in a Healthy Child
곽지혜,임연주,최의윤,강진한,Gwak, Ji Hye,Eem, Yeun Joo,Choi, Ui Yoon,Kang, Jin Han The Korean Society of Pediatric Infectious Disease 2013 Pediatric Infection and Vaccine Vol.20 No.1
Staphylococcus epidermidis is a normal inhabitant of skin, throat, mouth, vagina, and urethra. It is not usually pathogenic, particularly in immunocompetent hosts. This report describes a case of a pyogenic liver abscess caused by Staphylococcus epidermidis in a healthy 12-year-old boy. He was admitted to Seoul St. Mary's Hospital with intermittent fever for 6 days. Findings on abdominal computed tomography (CT) showed a mass measuring $7.0{\times}6.5$ cm in the right hepatic lobe. Culture of the abscess resulted in growth of Staphylococcus epidermidis as a causative organism. The patient was successfully treated with intravenous administration of antibiotics and percutaneous drainage of the abscess. 간농양은 선진국과 개발도상국에서 발생빈도에 차이가 있는 질환으로 국내에서는 드물다. 면역결핍, 간, 담도계기형, 천공성 충수염, 외상, 단백질 결핍 등의 선행요인이 있을 때 발생하기 쉬우며 Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus, Enterococcus, Bacteroides와 Entamoeba histolytica 등에 의해 유발된다. 저자들은 발열을 주소로 내원한 건강한 12세 남아에서 컴퓨터 단층촬영을 시행하여 간농양을 발견하였으며 경피배액술 흡인물 배양 검사에서 Staphylococcus epidermidis가 검출되어 항생제를 투여하여 합병증 없이 치료하였기에 보고한다.
정성훈(Jung, Sung-Hun),안세진(Ahn, Se-Jin),윤재호(Yun, Jae-Ho),곽지혜(Gwak, Ji-Hye),조아라(Cho, A-Ra),윤경훈(Yoon, Kyung-Hoon),김동환(Kim, Dong-Hwan) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
Despite the success of Cu(In,Ga)Se₂ (CIGS) based PV technology now emerging in several industrial initiatives, concerns about the cost of In and Ga are often expressed. It is believed that the cost of those elements will eventually limit the cost reduction of this technology. One candidate to replace CIGS is Cu₂ZnSnSe₄ (CZTSe), fabricated by co-evaporation technique. Co-evaporation technique will be one of the best methods to control film composition. This type of absorber derives from the CuInSe² chalcopyrite structure by substituting half of the indium atoms with zinc and other half with tin. Energy bandgap of this material has been reported to range from 0.8eV for selenide to 1.5eV for the sulfide and large coefficient in the order of 10^{14}cm^{-1}, which means large possibility of commercial production of the most suitable absorber by using the CZTSe film. In this work, Effects of substrate temperature of Cu₂ZnSnSe₄ absorber layer on the performance of thin films solar cells were investigated. We reported on some of the absorber properties and device results.
김균환(Kim, Kyun-Hwan),안세진(Ahn, Se-Jin),윤재호(Yun, Jae-Ho),곽지혜(Gwak, Ji-Hye),조아라(Jo, A-Ra),김도진(Kim, Do-Jin),윤경훈(Yoon, Kyung-Hoon) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
Chalcopyrite semiconductor CuInSe₂ nanoparticles were prepared using a low temperature colloidal route by reacting the starting materials (CuI, InI₃ and Na₂Se) in solvents. After synthesised CuInSe₂ nanoparticles precursors were mixed with organic binder for the viscosity of the precursor slurry to be suitable for the doctor blade method. The mixture of CuInSe₂ and binder was deposited onto molybdenum-coated sodalime glass substrates to form thin film. The precursor thin films were preheated on the hot plate to remove remaining solvents and binder material. After subsequent thermal processing of the thin film under a selenium ambient, CuInSe₂ absorber layer with grain size significantly lager than that of the nanoparticles was formed.
동시-스퍼터링 및 셀렌화에 의한 CuInSe<sub>2</sub> 박막 형성 기구 분석
문동권(Mun, Dong-Gwon),안세진(An, Se-Jin),윤재호(Yun, Jae-Ho),곽지혜(Gwak, Ji-Hye),조아라(Jo, A-Ra),이희덕(Lee, Hui-Deok),윤경훈(Yun, Gyeong-Hun) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
CuInSe₂계 태양전지는 동시 증발공정으로 최고 효율 약 20%를 얻었으나, 동시 증발법은 대면적화 및 조성 균일도 조절에 어려움이 있다. 이에 반해 스퍼터링 및 셀렌화 공정은 동시 증발법에 비해 대면적의 조성 조절 및 생산속도가 뻐른 장점이 있다. 이에 따라 스퍼터링 및 셀렌화 공정을 통해 CIS 태양전지를 양산화 하려는 시도가 전세계적으로 활발히 진행중이다. 그러나 연구소 및 학교를 중심으로 연구가 진행되어 박막 증착 공정 및 단계별 박막 특성이 많은 부분 밝혀진 동시 증발공정에 비해, 몇몇 기업을 중심으로 연구가 진행되고 있는 스퍼터링/셀렌화 공정의 경우 공정 조건 및 이에 따른 박막 특성/형성기구에 대한 정보가 거의 없는 상태이다. 따라서 본 연구에서는 CuIn 및 Cu 타겟을 동시 스퍼터링하여 전구체를 만든후 이를 셀렌화하여 CIS 박막을 성장시키고, 특히 열처리 단계별 상분석을 통해 CIS 형성기구를 고찰하고자 하였다.
박명국(Park, Myoung-Guk),안세진(Ahn, Se-Jin),윤재호(Yoon, Jea-Ho),곽지혜(Gwak, Ji-Hye),김동환(Kim, Dong-Hwan),윤경훈(Yoon, Kyung-Hoon) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
A non-vacuum process for fabrication of CuIn_xGa_{1-x}Se₂ (CIGS) absorber layer from the corresponing Cu, In, Ga solution precursors was described. Cu, In, Ga precursor solution was prepared by a room temperature colloidal route by reacting the starting materials Cu(NO₃)₂, InCl₃, Ga(NO₃) and methanol. The Cu, In, Ga precursor solution was mixed with ethylcellulose as organic binder material for the rheology of the mixture to be adjusted for the doctor blade method. After depositing the mixture of Cu, In, Ga solution with binder on Mo/glass substrate, the samples were preheated on the hot plate in air to evaporate remaining solvents and to burn the organic binder material. Subsequently, the resultant CIG/Mo/glass sample was selenized in Se evaporation in order to get a solar cell applicable dense CIGS absorber layer. The CIGS absorber layer selenized at 530?C substrate temperature for 1h with various metal organic ratio.