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신생아에 심한 심부전증을 일으킨 선천성 뇌동정맥 기형: 풍선 색전 요법을 시도한 1례
박인숙,김영휘,홍창의,조영국,서대철,박영일 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.2
Cerebral arteriovenous malformation is a rare cause of congestive heart failure in neonates and is known to carry a very poor prognosis even wish prompt recognition and aggressive treatment. We recently encountered a 2-day-old male neonate with huge cerebral arteriovenous malformation who presented with intractable heart failure. Despite aggressive medical treatment and partial embolization with detachable balloon, baby died of severe hearts failure. Since there is no report of percutaneous balloon embolization in a neonate with this lesion in Korean literature, we wish to present our experience in one such neonate. Also we believe this is the first report of color Doppler findings in cerebral arteriovenous malformation in Korean literature.
신경섭,주대일,김영숙 충북대학교 의과대학 충북대학교 의학연구소 2003 忠北醫大學術誌 Vol.13 No.2
연구목적: 저자들은 본원에 응급화학검사기기로 새로 도입된 Hitachi 7180 (Hitachi, Tokyo, Japan)의 분석 능을 보기 위하여, 정밀도, 직선성, 정확성을 평가하였으며 기존의 화학검사기기인 Hitachi 747 (Hitachi, Tokyo, Japan)과의 상관성도 평가하였다. 대상 및 방법: 포도당, 크레아티닌, blood urea nitrogen (이하 BUN), 총단백, 알부민, aspartic transaminase (이하 AST), 나트륨, 칼륨, 클로라이드 등 총 9종목에 대하여 정밀도를 측정하였으며, 포도당, 크레아티닌, BUN, AST에 대하여 직선성 및 회수율을 구하였다. 포도당, 크레아티닌, AST 및 총 빌리루빈에 대하여 Hitachi 747과 상관관계를 평가하였다 결과: 일내 정밀도는 저농도 및 고농도 정도관리 물질에서 3.05% 및 2.02% 이하의 변이계수를 보였으며, 총 정밀도는 각각 4.4%와 2.42% 이하의 변이계수를 보였다. 직선성을 평가한 모든 항목의 결정계수(r²)는 0.999 이상이었다. 회수율은 평가한 4종목에서 100.0에서 103.08% 사이이었다. Hitachi 747과 상관검사에서 측정한 4종목의 상관계수(r)는 모두 0.9986 이상이었다. 결론: Hitachi 7180은 정밀도, 직선성 및 회수율이 우수하였으며, 기존의 기기와 좋은 상관성을 보여 임상검사실에서의 적용에 유용할 것으로 사료된다. Purpose: The authors evaluated a recently introduced chemical analyzer, Hitachi 7180 (Hitachi, Tokyo, Japan) for precision, linearity, accuracy and comparability with Hitachi 747 (Hitachi, Tokyo, Japan) to see if it was suitable for the stat analyzer. Material and Methods: The precision, linearity, accuracy and comparison study were performed. For twenty day, the precision was performed for glucose, creatinine, BUN, protein, albumin, AST, sodium, potassium and chloride. The linearity and recovery rates were performed for glucose, creatinine, AST, BUN. The comparison study was performed with Hitachi 747 for glucose, creatinine, AST and total bilirubin. Results: The within-run coefficients of variations (CVs) at low and high concentrations were less than 3.05% and 2.02%, respectively. The total CVs for each groups were less than 4.4% and 2.42%, respectively. The linearity was well maintained in range of medically significant levels(r²≥0.999). The recovery rates were good for all tested items (100-103.8%). In comparison study, coefficients of correlation exceeded 0.9986 for all tests. Conclusion: The precision, linearity and accuracy of Hitachi 7180 were good. The correlation with Hitachi 747 was good. We concluded that its analyzer can be useful for clinical laboratory.
Kim, Se-Yun,Son, Dae-Ho,Kim, Young-Ill,Kim, Seung-Hyun,Kim, Sammi,Ahn, Kwangseok,Sung, Shi-Joon,Hwang, Dae-Kue,Yang, Kee-Jeong,Kang, Jin-Kyu,Kim, Dae-Hwan Elsevier 2019 Nano energy Vol.59 No.-
<P><B>Abstract</B></P> <P>In recent years, Cu<SUB>2</SUB>ZnSn(S<SUB>1-x</SUB>Se<SUB>x</SUB>)<SUB>4</SUB> (CZTSSe) prepared by a two-step process using metal precursors has been reported to exhibit a relatively high power conversion efficiency, and a high efficiency of 12.5% by two-step process contained via sputtering method was recently confirmed by our group. In this study, we proposed formation mechanisms for the CZTSSe double layer, voids and ZnSSe layer, which were observed in the CZTSSe using metal precursor. Due to the persistent dezincification from the metal precursors and preferential reaction between the Zn and chalcogens such as S and Se, almost all Zn is consumed to form the ZnSSe layer; as a result, large voids are produced first under the ZnSSe layer. Cu<SUB>2</SUB>Se and SnSe are grown on the ZnSSe layer via migration of the Cu and Sn through the grain boundaries of the ZnSSe layer. Thus, additional small voids are expected to form due to the mass transfer of Cu and Sn. Because of the preferentially formed ZnSSe layer and the chalcogenation of Cu and Sn after the mass transfer, a CZTSSe double layer can be formed, and ZnSSe can exist between these CZTSSe layers. Finally, we propose a method based on the formation mechanism to control the voids and secondary phases, which affect the fill factor and output current.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The new formation mechanisms of the voids, ZnSSe layer and CZTSSe double layer that were observed in the sister sample of 12.5% of CZTSSe cell. </LI> <LI> Large voids are produced under the ZnSSe layer due to the persistent dezincification and preferential reaction between the Zn and chalcogens. </LI> <LI> Additional small voids are expected to form due to the migration of Cu and Sn from under the ZnSSe layer to above ZnSSe layer. </LI> <LI> Due to the preferentially formed ZnSSe layer and Cu and Sn migration, ZnSSe secondary phase exists between the CZTSSe double layers. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>The new formation mechanisms of the voids, ZnSSe layer and CZTSSe double layer that were observed in the sister sample of 12.5% of CZTSSe cell.</P> <P>[DISPLAY OMISSION]</P>
Kim Jahyung,Min Kyung-Dae,Lee Byung-Ill,Kim Jun-Bum,Kwon Sai-Won,Chun Dong-Il,Kim Yong-Beom,Seo Gi-Won,Lee Jeong Seok,Park Suyeon,Choi Hyung-Suk 대한슬관절학회 2020 대한슬관절학회지 Vol.32 No.-
Our purpose in the current meta-analysis was to compare the functional outcomes in patients who have received single-radius (SR) or multi-radius (MR) femoral components in randomized controlled trials (RCTs) for primary total knee arthroplasty (TKA). The hypothesis was that there would be no statistically significant difference between two groups in terms of functional outcomes.We searched the international electronic databases PubMed, Embase, and the Cochrane Central Register of Controlled Trials up to February 2020 for RCTs that compared functional outcomes of SR and MR femoral component designs after primary TKA. We performed a meta-analysis of nine RCTs using the Knee Society Score for the knee (KSS-knee), KSS-function, Knee Injury and Osteoarthritis Outcome Score (KOOS), Oxford Knee Score (OKS), degree of knee flexion, extension, and complications, including postoperative infection and revision surgery.The meta-analysis revealed no statistically significant differences in all the analyzed variables, including KSS-knee, KSS-function, KOOS, OKS, knee flexion, and knee extension. For postoperative complications, no statistically significant differences were detected for femoral component designs in postoperative infection or incidence of revision surgery between the two groups.The current meta-analysis of RCTs did not show any statistically significant differences between SR and MR femoral component designs in terms of postoperative functional outcomes. Evaluated outcomes included functional outcome scores, degree of knee flexion, extension, and complications. However, because of the limited clinical evidence of this study owing to the heterogeneity between the included RCTs, a careful approach should be made in order not to arrive at definite conclusions.
Production and Rheological Properties of Bioflocculant Produced by Bacillus sp. DP-152
( DAE OOK KANG ),( HEE MOCK OH ),( Hyun Hyo Suh ),( Byung Dae Yoon ),( HEE SIK KIM ),( SEONG HOON MOON ),( Hyoung Kab Kim ),( Gee Ill Jun ),( Hyun Seoun Park ) 한국미생물생명공학회 1998 Journal of microbiology and biotechnology Vol.8 No.6
Kim, Tae Hyun,Cho, Kwan Ho,Pyo, Hong Ryull,Lee, Jin Soo,Zo, Jae Ill,Lee, Dae Ho,Lee, Jong Mog,Kim, Hyae Young,Hwangbo, Bin,Park, Sung Yong,Kim, Joo Young,Shin, Kyung Hwan,Kim, Dae Yong Radiological Society of North America 2005 Radiology Vol.235 No.1
<P>PURPOSE: To retrospectively evaluate dose-volumetric parameters for association with risk of severe (grade >/=3) radiation pneumonitis (RP) in patients after three-dimensional (3D) conformal radiation therapy for lung cancer. MATERIALS AND METHODS: The study was approved by the institutional review board, which did not require informed consent. Data from 76 patients (66 men, 10 women; median age, 60 years; range, 35-79 years) with histologically proved lung cancer treated curatively with 3D conformal radiation therapy between August 2001 and October 2002 were retrospectively analyzed. Twenty patients underwent surgery before radiation therapy; 57 patients received chemotherapy. Median total radiation dose of 60 Gy (range, 54-66 Gy) was delivered in 30 (range, 27-33) fractions over 6 weeks. RP was scored by using Radiation Therapy Oncology Group criteria. Clinical parameters were analyzed. Dose-volumetric parameters analyzed were percentage of lung volume that received a dose of 20 Gy or more (V20), 30 Gy or more (V30), 40 Gy or more (V40), or 50 Gy or more (V50); mean lung dose (MLD); normal tissue complication probability (NTCP); and total dose. Fisher exact test was performed to compare clinical parameters between patients who developed severe RP and those who did not. Univariate and multivariate logistic regression analyses were performed to evaluate data for association between dose-volumetric parameters and severe RP. Pearson chi(2) test was used to assess data for correlations among dose-volumetric parameters. P < or = .05 was considered to indicate statistically significant difference. RESULTS: Of 76 patients, 30 (39%) did not develop RP; 23 (30%) developed RP of grade 1; 11 (14%), grade 2; 11 (14%), grade 3; and 1 (1%), grade 4. None had grade 5 RP. Age (< 60 vs > or =60), sex, Karnofsky performance status (< 70 vs > or =70), forced expiratory volume in 1 second, presence of weight loss, preexisting lung disease, history of thoracic surgery, and history of chemotherapy did not significantly differ between patients who developed severe RP and those who did not. In univariate analyses, MLD, V20, V30, V40, V50, and NTCP were associated with severe RP (P < .05). In multivariate analysis, MLD was the only variable associated with severe RP. CONCLUSION: MLD is a useful indicator of risk for development of severe RP after 3D conformal radiation therapy in patients with lung cancer.</P>
Secondary Phase and Defects in Cu₂ZnSnSe₄ Solar Cells with Decreasing Absorber Layer Thickness
Young-Ill Kim,Dae-Ho Son,Jaebaek Lee,Shi-Joon Sung,Jin-Kyu Kang,Dae-Hwan Kim,Kee-Jeong Yang 한국태양광발전학회 2021 Current Photovoltaic Research Vol.9 No.3
The power conversion efficiency of Cu₂ZnSnSe₄ (CZTSe) solar cells depends on the absorber layer thickness; however, changes in the characteristics of the cells with varying absorber layer thickness are unclear. In this study, we investigated the changes in the characteristics of CZTSe solar cells for varying absorber layer thickness. Five absorber thicknesses were employed: CZTSe1 2.78 μm, CZTSe2 1.01 μm, CZTSe3 0.55 μm, CZTSe4 0.29 μm, and CZTSe5 0.15-0.23 μm. The efficiency of the CZTSe solar cells decreased as the absorber thickness decreased, resulting in power conversion efficiencies of 10.45% (CZTSe1), 8.67% (CZTSe2), 7.14% (CZTSe3), 3.44% (CZTSe4), and 1.54% (CZTSe5). As the thickness of the CZTSe absorber layer decreased, the electron-hole recombination at the grain boundaries and the absorber-back-contact interface increased. This caused an increase in the current loss, owing to light loss in the long-wavelength region. In addition, as the thickness of the CZTSe absorber layer decreased, more ZnSe was produced, and the resulting defects and defect clusters led to an open-circuit voltage loss.