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Primary Extraskeletal Osteosarcoma in the Anterior Mediastinum: A Case Report and Review
주서희,송재원,나권중,박샘이나,박인규,김영태,강창현 대한흉부외과학회 2019 Journal of Chest Surgery (J Chest Surg) Vol.52 No.4
Extraskeletal osteosarcoma (ESOS) is a malignant soft tissue neoplasm producing osteoid, without any continuity with the bone or periosteum. Primary ESOS presenting in the mediastinum is an extremely rare, yet aggressive malignant tumor associated with a poor prognosis. We report a case of primary ESOS arising from the thymus in a 63-year-old male patient.
분무열분해 공정에 의해 합성된 LiNiO2 분말의 특성
주서희,강윤찬 한국전기화학회 2008 한국전기화학회지 Vol.11 No.4
구연산과 에틸렌 글리콜이 함유된 분무용액으로부터 분무열분해 공정에 의해 미세한 LiNiO2 분 말들을 합성하였다. 마이크론 크기를 가지는 구형 형상 및 다공성의 전구체 분말들은 800oC에서 의 후열처리 후에 마이크론 크기 및 균일한 형태를 가지는 LiNiO2 분말로 전환되었다. 분무용 액에 첨가된 구연산 및 에틸렌 글리콜의 농도가 0에서 1 M 까지 증가할 때 LiNiO2 분말들의 초기 방전 용량은 199 mAh/g 에서 171 mAh/g 까지 감소하였다. 구연산과 에틸렌 글리콜을 함 유한 분무용액으로부터 합성된 LiNiO2 분말은 리튬의 첨가량이 양론비보다 6 mol% 과량일 때 198 mAh/g의 최대 초기 방전 용량을 가졌다. 미세한 LiNiO2 분말은 0.1 C 의 전류 밀도하에 서 30회 충방전 후에 방전 용량이 198 mAh/g 에서 163 mAh/g 으로 감소하였다
분무열분해 공정에 의해 합성된 LiNiO<sub>2</sub> 분말의 특성
주서희,강윤찬,Ju, Seo-Hee,Kang, Yun-Chan 한국전기화학회 2008 한국전기화학회지 Vol.11 No.4
구연산과 에틸렌 글리콜이 함유된 분무용액으로부터 분무열분해 공정에 의해 미세한 $LiNiO_2$ 분말들을 합성하였다. 마이크론 크기를 가지는 구형 형상 및 다공성의 전구체 분말들은 $800^{\circ}C$에서의 후열처리 후에 마이크론 크기 및 균일한 형태를 가지는 $LiNiO_2$ 분말로 전환되었다. 분무용액에 첨가된 구연산 및 에틸렌 글리콜의 농도가 0에서 1 M 까지 증가할 때 $LiNiO_2$ 분말들의 초기 방전 용량은 199 mAh/g 에서 171 mAh/g 까지 감소하였다. 구연산과 에틸렌 글리콜을 함 유한 분무용액으로부터 합성된 $LiNiO_2$ 분말은 리튬의 첨가량이 양론비보다 6 mol% 과량일 때 198 mAh/g의 최대 초기 방전 용량을 가졌다. 미세한 $LiNiO_2$ 분말은 0.1 C 의 전류 밀도하에서 30회 충방전 후에 방전 용량이 198 mAh/g 에서 163 mAh/g 으로 감소하였다. $LiNiO_2$ cathode powders with fine size have been synthesized by spray pyrolysis from the spray solution with citric acid and ethylene glycol. The as-prepared powders with spherical shape, porous structure and micron size turned into $LiNiO_2$ powders with micron size and regular morphology after post-treatment at $800^{\circ}C$. The initial discharge capacities of the $LiNiO_2$ powders changed from 199 to 171mAh/g when the concentrations of the citric acid and ethylene glycol added to the spray solutions were changed from 0 to 1 M. The maximum initial discharge capacity of the $LiNiO_2$ powders obtained from the spray solution with citric acid and ethylene glycol was 198 mAh/g when the lithium component added to the spray solution was 6 mol% excess of the stoichiometric amount. The discharge capacities of the fine-sized $LiNiO_2$ powders dropped from 198 to 163 mAh/g by the 30 th cycle at a current density of 0.1 C.
저압 분무열분해법에 의해 합성된 나노 크기의 코발트 산화물 입자의 특성
주서희,김도엽,강윤찬,Ju, Seo-Hee,Kim, Do-Youp,Kang, Yun-Chan 한국재료학회 2006 한국재료학회지 Vol.16 No.9
Nano-sized cobalt oxide powders were prepared by low pressure spray pyrolysis process. The precursor powders obtained by low pressure spray pyrolysis process from the spray solution with ethylene glycol had several microns size and hollow structure. The precursor powders obtained from the spray solution with optimum concentration of ethylene glycol formed the nano-sized cobalt oxide powders with regular morphology after post-treatment without milling process. On the other hand, the cobalt oxide powders obtained from the spray solution without ethylene glycol had submicron size and spherical shape before and after posttreatment. The mean size of the cobalt oxide powders formed from the spray solution with concentration of ethylene glycol of 0.7M was 180 nm after post-treatment at temperature of $800^{\circ}C$. The mean size of the powders could be controlled from several tens nanometer to micron sizes by changing the post-treatment temperatures in the preparation of cobalt oxide powders by low pressure spray pyrolysis process.
실리카 함유 콜로이달 분무용액으로부터 합성된 BAM:Mn 형광체
주서희,구혜영,홍승권,김도엽,강윤찬,Ju, Seo-Hee,Koo, Hye-Young,Hong, Seung-Kwon,Kim, Do-Youp,Kang, Yun-Chan 한국재료학회 2006 한국재료학회지 Vol.16 No.2
[ $BaMgAl_{10}O_{19}:Mn^{2+}$ ](BAM:Mn) phosphor particles with spherical shape were prepared by spray pyrolysis from colloidal solution with silica. The phosphor particles prepared by spray pyrolysis from aqueous solution had irregular morphology after high temperature post-treatment. On the other hand, the phosphor particles prepared from spray solution with colloidal silica had spherical shape after post-treatment. Colloidal silica used as additive improved the spherical shape and filled morphology of the precursor particles prepared by spray pyrolysis. The precursor particles with filled structure produced the BAM:Mn phosphor particles with spherical shape and non-aggregation characteristics after post-treatment at $1400^{\circ}C$ under reducing atmosphere. The phosphor particles prepared from colloidal solutions formed the crystal structure of BAM:Mn phosphor irrespective of the silica contents. The BAM:Mn phosphor particles prepared from aqueous and colloidal solutions had similar photoluminescence intensities under vacuum ultraviolet.
고온 분무열분해 공정에 의한 녹색 발광의 BAM:Mn 형광체 합성
주서희,구혜영,김도엽,강윤찬,Ju Seo Hee,Koo Hye Young,Kim Do Youp,Kang Yun Chan 한국재료학회 2005 한국재료학회지 Vol.15 No.8
Green-light emitting $BaMgAl_{10}O_{19}:Mn^{2+}$ (BAM:Mn) phosphor particles were prepared by spray Pyrolysis. The effect of reactor temperature and flow rate of carrier gas in the spray Pyrolysis on the morphology, crystallinity and photoluminescence characteristics under vacuum ultraviolet were investigated. The morphology of the as-Prepared Particles obtained by spray Pyrolysis had spherical shape and non-aggregation characteristics regardless of the reactor temperature. The spherical shape of the as-prepared Particles obtained by spray pyrolysis at low temperature disappeared after Post-treatment. On the other hand the as-Prepared Particles obtained by spray Pyrolysis at $1600^{\circ}C$ maintained spherical shape and non-aggregation characteristics after post-treatment at $1400^{\circ}C$ for 3 h under reducing atmosphere. The BAM:Mn Phosphor Particles Prepared by spray Pyrolysis at different reactor temperatures had pure crystal structure and high photoluminescence intensities under vacuum ultraviolet after post-treatment. BAM:Mn phosphor particles prepared by spray Pyrolysis at low How rate of carrier gas had complete spherical shape and filed morphology and high photoluminescence intensity after post-treatment under reducing atmosphere.
Postcardiotomy Extracorporeal Membrane Oxygenation Support in Patients with Congenital Heart Disease
주서희,조성규,이재홍,민준철,권혜원,곽재건,김웅한 대한흉부외과학회 2022 Journal of Chest Surgery (J Chest Surg) Vol.55 No.2
Background: This study investigated mortality and morbidity in patients requiring postcardiotomy extracorporeal membrane oxygenation (ECMO) support after operations for congenital heart disease (CHD). Methods: CHD patients requiring postoperative ECMO support between May 2011 and May 2021 were retrospectively reviewed. Patients were divided into non-survivors and survivors to hospital discharge. Survival outcomes and associations of various factors with in-hospital death were analyzed. Results: Fifty patients required postoperative ECMO support. Patients’ median age and weight at the time of ECMO insertion were 1.85 months (interquartile range [IQR], 0.23– 14.5 months) and 3.84 kg (IQR, 3.08–7.88 kg), respectively. Twenty-nine patients (58%) were male. The median duration of ECMO support was 6 days (IQR, 3–12 days). Twenty-nine patients (58%) died on ECMO support or after ECMO weaning, and 21 (42%) survived to hospital discharge. Postoperative complications included renal failure (n=33, 66%), bleeding (n=11, 22%), and sepsis (n=15, 30%). Prolonged ECMO support (p=0.017), renal failure (p=0.005), continuous renal replacement therapy (CRRT) application (p=0.001), sepsis (p=0.012), bleeding (p=0.032), and high serum lactate (p=0.002) and total bilirubin (p=0.017) levels during ECMO support were associated with higher mortality risk in a univariate analysis. A multivariable analysis identified CRRT application (p=0.013) and a high serum total bilirubin level (p=0.001) as independent risk factors for death. Conclusion: Postcardiotomy ECMO should be considered as an important therapeutic modality for patients unresponsive to conventional management. ECMO implementation strategies and management in appropriate patients without severe complications, particularly renal failure and/or liver failure, are crucial for achieving positive outcomes.