http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이재현,김정태,조용곤 대한진단검사의학회 2008 Annals of Laboratory Medicine Vol.28 No.2
Background : To determine whether nitric oxide (NO) could inhibit activation of platelets stored in a cold or frozen state, we measured platelet P-selectin expression and platelet-bound fibrinogen in platelet-rich plasma (PRP) with S-nitrosoglutathione (GSNO) (Sigma, USA) by flow cytometry. Methods : PRP was prepared by centrifuging venous blood collected in a 3.2% sodium citrate tube from 10 healthy donors. It was aliquotted into 4 groups (no cryoprotectant, GSNO, GSNO/ dimethyl sulfoxide [DMSO] [Sigma], and DMSO), and stored at room, cold and freezing temperatures for 24 hrs. We performed a flow cytometric analysis of all specimens stained with FITC-fibrinogen and PE-CD62P monoclonal antibodies (Becton Dickinson, USA). The results were compared according to the storage temperature and agonist among 4 groups. Results : GSNO inhibited significantly the activation of frozen platelets, but not in the presence of DMSO. GSNO was also shown to preserve the aggregability of frozen platelets because in the presence of GSNO the delta percent change of P-selectin expression and fibrinogen binding of frozen platelets increased significantly irrelevant to DMSO. Conclusions : GSNO inhibited the activation of frozen platelets and preserved the platelet aggregability; therefore, it may be used as a protectant for platelet cryopreservation. (Korean J Lab Med 2008;28:136-43)
변형 최소 편향각 기법을 이용한 실용적 액체 농도 측정 방법
이재현,최형순,남기봉 한국물리학회 2014 새물리 Vol.64 No.10
프림즈을 이용하여 굴절율을 측정하는 기법인 최소 편향각 기법을 변형한, 직각 프리즘 기반의 액체 굴절율 측정 시스템을 구성하고, 이를 이용하여 소금물의 농도를 측정하는 과정을 광설계 분석용 소프트웨어인 OSLO$^{TM}$를 이용하여 검증하였다. 시료 용기는 상용 제품을 사용하였으나 그 물리적 구조적 특성은 검증 되지 않은 상태로 사용하였다. 측정된 결과는 기준 값들과 강한 상관성을 보였다. 이를 이용하면 유사 시료를 반복 측정하는 시스템에서 시료 용기나 재질 등을 정확하게 측정하여 반영하지 않아도 보정을 통하여 이 기법을 활용할 수 있음을 확인하였다. We adopted the modified minimum-deviation method to measure the refractive index of a liquid to study the possibility of exporting this method to routine concentration measurement. Here, the liquid holder, a disposable unit, was a hollow right-angle prism made of acrylic plastic. The analysis of the results indicated the existence of unknown parameters that were associated mostly with the sample holder, yet the method produced a highly-coherent result compared with the standard values for the range of salt concentrations tested. Such a system with uncharacterized variables was also shown to be suitable for measuring liquid concentrations in routine runs with a proper calibration step.