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PT, aPTT의 측정에서 항응고제와 혈액의 비율에 따른 검사결과 비교분석
김수견 ( S. K. Kim ),문금희 ( K. H. Moon ),백승옥 ( S. O. Paik ),유선우 ( S. W. You ),이광근 ( K. K. Lee ),박효순 ( H. S. Park ),금동극 ( D. G. Keum ) 대한임상병리사협회 1999 임상혈액검사학회 발표자료집 Vol.5 No.1
The Prothrombin Time (PT) test and activated Partial Thromboplastin Time (aPTT) test are commonly used for screening coagulation disorders and monitoring of anticoagulant therapy. And the proper quality assurance of all the factors relevant to whole process of testing from sampling to reporting. Authors investigated the dilution effects in PT and aPTT testing wheather they were clinically significant factors by assessing the effect of ratio between anticoagulant and whole blood. Fifty healthy and fifty with coagulation abnormality were subjected to this study. Samples were diluted to the ratio of 1:5, 1:7, 1:9, 1:11, and 1:13 by collecting 1.0mL, 1.4mL, 1.8mL, 2.2mL, and 2.6mL into vacuum tube with 0.2mL of 3.8% sodium citrate. Tests were done immediately after sampling. In normal control group, the results of PT and aPTT with dilution ratio of 1:9 were statistically different from those of 1:5, 1:7, 1:9, 1:11, and 1:13 (P<0.01). In the group with coagulation abnormality, those of PT with 1:9 were statistically different from those of 1:5 (P<0.01) and 1:7 (P<0.05) and those of aPTT with 1:9 were statistically different from those of 1:5, 1:7, and 1:13 (P<0.05). In conclusion, the dilution ratio was an important factor for PT and aPTT tests. Especially in abnormal samples, over-citration showed more prominent effects.
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전해도금 공정온도가 Co-Pt 합금 박막의 미세구조 및 자기적 특성에 미치는 영향
이창형,정근희,박정갑,이광근,서수정,Lee, C.H.,Jeong, G.H.,Park, J.K.,Lee, K.K.,Suh, S.J. 한국결정성장학회 2008 한국결정성장학회지 Vol.18 No.2
Co-Pt 합금 박막은 amino-citrate 기반의 전해액에서 Ru(30 nm)/Ta(5 nm)/Si(100)구조의 작업 전극을 사용하여 정전류 전해도금 방법으로 증착 하였다. (0002) 우선 성장된 Ru의 buffer layers를 사용하여 Co-Pt 합금 박막의 결정구조와 우선 성장을 조절하였다. 본 실험에서는 도금액 온도를 변화시킴에 따른 Co-Pt 합금 박막의 자기적 성질과 미세구조에 미치는 영향을 고찰하였다. Co-Pt 합금 박막의 형상과 조성은 FESEM 과 EDS로 확인하였고, XRD로 결정구조를 분석하였다. 자기적 성질은 진동 시료 자력계와 토오크 자력계로 분석하였다. Co-Pt 합금 박막은 박막표면과 수직한 방향에서 열처리 없이 각각 6527 Oe의 높은 보자력과 0.93의 높은 각형비를 나타내었다. Co-Pt alloy thin films were galvanostatically electrodeposited on Ru (30 nm)/Ta (5 nm)/Si (100) substrates from a amino-citrate based electrolyte. We used Ru(0002)-oriented buffer layers to control the crystallinity and orientation of the Co-Pt alloy thin films. The effect of solution temperature on the microstructure and magnetic properties of the Co-Pt alloy thin film was investigated. The samples were characterized by EDS, FESEM, XRD diffractometer using Cu $K{\alpha}$ radiation. The magnetic properties of these films were analyzed by a VSM and torque magnetometer. The Co-Pt alloy thin films were exhibited very high out-of-plane coercivity and squareness of the multilayer were 6527 Oe and 0.93, respectively, without heat treatment.
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