• 분석과학
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• 제10권4호
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• pp.240-245
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• 1997

ICP/MS에 의해 전혈 중의 납을 정확하게 분석하는 방법을 개발하였다. 전혈시료를 납의 오염과 손실 없이 마이크로파 분해장치에서 분해시키고, 96개 혈액시료 중의 $Pb^{208}$을 ICP/MS로 측정하여 분석하였다. 실제 인체 혈액 시료 중의 Pb 함량은 $2.50{\sim}22.8{\mu}g/dL$ 범위였다. NIST SRM 955a series를 분석함으로써 이 분석방법의 정확도를 확인하였다.

• JSTS:Journal of Semiconductor Technology and Science
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• 제5권1호
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• pp.1-10
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• 2005

This paper presents the development of a microsystem for whole blood purification and electrophysiological analysis of the purified cells. Magnetophoresis using continuous diamagnetic capture (DMC) was utilized for whole cell purification and electrical impedance spectroscopy (EIS) was utilized for electrophysiological analysis of the purified cells. The system was developed on silicon and plastic substrates utilizing conventional microfabrication technologies and plastic microfabrication technologies. Using the magnetophoretic microseparator, white blood cells were purified from a sample of whole blood. The experimental results of the DMC microseparator show that 89.7% of the red blood cells (RBCs) and 72.7% of the white blood cells (WBCs) could be continuously separated out from a whole blood using an external magnetic flux of 0.2 T. EIS was used as a downstream whole cell analysis tool to study the electrophysiological characteristics of purified cells. In this work, primary cultured bovine chromaffin cells and human red blood cells were characterized using EIS. Further analysis capabilities of the EIS were demonstrated by successfully obtaining unique impedance signatures for chromaffin cells based on the whole cell ion channel activity.

• 대한수혈학회지
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• 제23권2호
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• pp.162-168
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• 2012

배경: 세포 내 공간에서 가장 흔한 양이온은 칼륨이며 생리적으로 중요한 역할을 한다. 칼륨 불균형 발생시 생명을 위협할 수 있는 문제가 생길 수 있으며 그 문제들은 전신 쇠약부터 심실 세동에 의한 심장마비까지 있다. 따라서 응급의학과 의사가 짧은 시간 내에 그런 문제를 찾아내야 하는 것은 매우 중요하다. 이 연구에서 우리는 전혈과 혈청의 샘플들을 서로 짝을 지어 비교 분석하여 전혈의 결과가 혈청의 결과만큼 유용하게 쓰일 수 있는지 알아보기로 했다. 방법: 227명의 환자에게서 두 종류의 샘플을 채취하여 비교했다. 하나의 샘플은 요골동맥에서 채취한 전혈을 헤파린 처리된 주사기에 담아 검사했으며 다른 하나는 혈청 샘플을 담아 검사실에서 검사했다. 그 후 샘플들을 정상, 저 칼륨, 고 칼륨의 세 그룹으로 나누어 각각의 그룹에서 혈청과 전혈의 샘플들을 비교하였다. 결과: 혈청과 전혈의 칼륨 수치들의 차이는 통계학적으로 큰 의미를 보이지는 않았으며(P<0.05) 세 그룹 내에서의 칼륨 수치들간의 연관성은 통계학적으로 의미 있게 상관관계를 보였다(P<0.05). 세 그룹 중 고 칼륨 그룹에서 전혈과 혈청의 칼륨 수치가 가장 높은 상관관계를 보였으며 저 칼륨 그룹에서 가장 낮은 상관관계를 보였다. 결론: 전혈을 이용한 응급 검사가 칼륨 이상 소견, 특히 고칼륨혈증이 의심되는 환자의 진단에 선별검사로써 유용하게 사용될 수 있을 것으로 사료된다.

• Korea-Australia Rheology Journal
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• 제16권2호
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• pp.85-90
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• 2004

The present study investigated the deformability of red blood cells (RBC) and its effect on whole blood viscosity using a laser-diffraction slit-rheometer (LDSR). The LDSR has been recently developed with significant advances in laser-diffractometry design, operation and data analysis. While shear stress levels in a slit flow are continuously decreasing, both the deformation of red blood cells and the shear stress were simultaneously measured. Additionally, the viscosity of whole blood was measured using the LDSR. The present study found that the whole blood viscosity is strongly dependent on the RBC deformability. The less deformable the RBCs are, the higher the blood viscosity is.

• 분석과학
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• 제8권3호
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• pp.273-279
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• 1995

납과 카드뮴을 포함하는 여러 가지 농도의 동결건조된 혈액이 외부정도관리 시료로서 제조되었다. 이 시료들은 흑연료 원자흡수분광법(GFAAS)을 이용하여 성능이 파악되었다. 매트릭스 개선제로서 0.1% ammonium dihydrogen phosphate와 0.1% Triton X-100을 사용하여 섭씨 600 내지 650도의 회화온도에서 혈액에 있는 납과 카드뮴의 정량 분석을 위한 GFAAS의 최적 분석조건이 얻어졌다. 제조된 혈액의 균질도와 안정도는 최적화된 분석조건에서 연구되었다.

• 약학회지
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• 제48권3호
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• pp.171-176
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• 2004

This study was described for measuring clinically relevant levels of glucose in undiluted plasma and whole blood by near-infrared (NIR) spectroscopy. Result from an initial measurement of major blood components powder was over-lapped the absorption bands of glucose at 1500-1600 nm. However, the NIR data of blood components were clearly separated by principle component analysis (PCA) space. By the use of partial least squares (PLS) regression, glucose concentrations in undiluted plasma and whole blood could be determined with standard errors of prediction (SEP) of 15 mg/dl and 76 mg/dl, respectively. Although these blood components possessed strong absorption bands that overlapped with the absorption bands of glucose, successful calibration models could be carried out.

• Asian-Australasian Journal of Animal Sciences
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• 제27권4호
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• pp.471-478
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• 2014

Investigating gene expression of immune cells of whole blood or peripheral blood mononuclear cells (PBMC) under polyinosinic:polycytidylic acid (poly I:C) stimulation is valuable for understanding the immune response of organism to RNA viruses. Quantitative real-time PCR (qRT-PCR) is a standard method for quantification of gene expression studies. However, the reliability of qRT-PCR data critically depends on proper selection of reference genes. In the study, using two different analysis programs, geNorm and NormFinder, we systematically evaluated the gene expression stability of six candidate reference genes (GAPDH, ACTB, B2M, RPL4, TBP, and PPIA) in samples of whole blood and PBMC with or without poly I:C stimulation. Generally, the six candidate genes performed a similar trend of expression stability in the samples of whole blood and PBMC, but more stably expressed in whole blood than in PBMC. geNorm ranked B2M and PPIA as the best combination for gene expression normalization, while according to NormFinder, TBP was ranked as the most stable reference gene, followed by B2M and PPIA. Comprehensively considering the results from the two programs, we recommended using the geometric mean of the three genes, TBP, PPIA and B2M, to normalize the gene expression of whole blood and PBMC with poly I:C stimulation. Our study is the first detailed survey of the gene expression stability in whole blood and PBMC with or without poly I:C stimulation and should be helpful for investigating the molecular mechanism involved in porcine whole blood and PBMC in response to poly I:C stimulation.

• Environmental Analysis Health and Toxicology
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• 제23권4호
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• pp.285-290
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• 2008

Effects of titanium dioxide nanoparticles on blood coagulation and platelet aggregation were investigated using diluted whole blood and platelet rich plasma (PRP) solution prepared from human and rat blood, respectively. Blood coagulation was monitored by using a whole blood impedance aggregometer and titanium dioxide nanoparticle (10, 20, and 40 ppm) did not show any effect on the coagulation both in human and in rat blood. When platelet aggregation was measured by turbidometric method after addition of titanium dioxide nanoparticles to PRP solution with final concentrations of 1, 5 and 10 ppm. no aggregation was observed.

• 한국환경보건학회지
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• 제47권1호
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• pp.64-77
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• 2021

Objective: Biological monitoring of trace elements in human blood samples has become an important indicator of the health environment. The purpose of this study was to detect and evaluate multiple metal items in blood samples based on ICP-MS, to perform comparative evaluation with the existing analysis method, and to develop and verify a new method. Methods: 100 μL of whole blood from 80 healthy subjects was used to analyze ten metals (Sb, tAs, Cd, Pb, Mn, Hg, Mo, Ni, Se, Tl) using ICP-MS. Verification of the analysis method included calculation of linearity, accuracy, precision and detection limits. In addition, a comparative test with the conventional graphite furnace atomic absorption spectroscopy (GF-AAS) method was performed. In the case of Pb, Cd, and Hg in whole blood, cross-analysis between Pb, Cd, and Hg analysis methods was performed to confirm the difference between the existing method and the new method (ICP-MS). Results: The coefficient of determination (R2) was 0.999 or higher in seven items and 0.995 or higher in three items. The Pb result showed that Pearson's correlation coefficient was very high at 0.983, and the intraclass correlation coefficient was 0.966. The Cd result showed that Pearson's correlation coefficient was 0.917 between the existing method and the new analysis concentration value. Its intraclass correlation coefficient was 0.960, and there was no significant difference between the two groups. Hg had a low correlation at 0.687, and the intraclass correlation coefficient was 0.761, which was lower than that of Pb and Cd. The intra-day and inter-day accuracy of Pd and Cd were satisfactory, but Hg did not meet the criteria for both accuracy and precision when compared with the conventional analysis method. Conclusion: This study can be meaningful in that it proposes a more efficient and feasible analysis method by verifying a blood heavy metal concentration experiment using multiple simultaneous analyses. All samples were processed and analyzed using the new ICP-MS. It was confirmed that the agreement between the two methods was very high, with the agreement between the current and new methods being 0.769 to 0.998. This study proposes an efficient simultaneous methodology capable of analyzing multiple elements with small samples. In the future, studies of various applications and the reliability of ICP-MS analysis methods are required, and research on the verification of accurate, precise, and continuous analysis methods is required.

• 대한화학회지
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• 제57권5호
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• pp.568-573
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• 2013

A selective and sensitive method for simultaneous determination of copper in blood by adsorptive differential pulse cathodic stripping voltammetry is presented. The procedure involves an adsorptive accumulation of Cu(II)-ETSC (4- ethyl-3-thiosemicarbazide) on a hanging mercury drop electrode, followed by a stripping voltammetry measurement of reduction current of adsorbed complex at about -715 mV. The optimum conditions for the analysis of copper (II) ion are : pH 10.3, concentration of 4-ethyl-3-thiosemicarbazide $3.25{\times}10^{-6}$ M and an accumulation potential of -100 mV. The peak current is proportional to the concentration of copper over the range 0.003-125 ng/mL with a detection limit of 0.001 ng/mL and an accumulation time of 60 s. Moreover, with the use of the proposed method, there is a considerable improvement in the detection limit, the linear dynamic range and the deposition time, compared with the methods of adsorptive stripping voltammetry for the determination of copper. The developed method was validated by analysis of whole blood certified reference materials.