• The Korean Journal of Ceramics
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• v.1 no.4
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• pp.191-196
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• 1995

Using sol-gel processing method, thin films of lathanum modified lead titanate(PLT) on Corning 7059 glass were prepared. A differential thermal analysis (DTA/TG) curve of gel powder and infrared spectra (FT-IR) of the films were measured to estimate residual organices in them. The heat-treated films were characterized by X-ray diffraction(XRD). Microstructures of the films were observed by a scanning electron microscope (SEM). Optical properties of the films were determined by a UV-VIS spectrophotometer. The waveguiding properties and optical attenuation were measured with the end coupling method and the cut back method. Effects of the drying conditions on the transmittance and the propagation loss of the films were investigated. Experimemtal results showed that the content of residual organics in the film decreased as the drying temperature of the film increased. As the La content of the film increased, the grain size decreased and the transmittance increased. The transmittances of the films increased with the increasing of the drying temperature. The propagation losses in the film decreased as the drying temperature increased.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.48 no.5
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• pp.303-308
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• 1999

Dielectric thin films of PLT(28) ($(Pb_{0.72}La_{0.28})Ti_{0.93}O_3$) have been deposited on $Pt/Ti/SiO_2/Si$ substrates in situ by a laser ablation. We have systematically changed the laser fluence from 0.4 J/$cm^2$ to 3 J/$cm^2$, and deposition temperature from $450^{\circ}C\; to\; 700^{\circ}C$. The surface morphology was changed from planar grain structure to columnar structure as the nucleation energy was increased. The PLT thin film with columnar structure showed good dielectric properties. The deposition temperature influenced on nucleation energy much stronger than the laser energy density did.

• Journal of Microbiology and Biotechnology
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• v.28 no.12
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• pp.2141-2144
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• 2018

Based on previous studies reporting the anti-prion activity of poly-${\text\tiny{L}}$-lysine and poly-${\text\tiny{L}}$-arginine, we investigated cationic poly-${\text\tiny{L}}$-ornithine (PLO), poly-${\text\tiny{L}}$-histidine (PLH), anionic poly-${\text\tiny{L}}$-glutamic acid (PLE) and uncharged poly-${\text\tiny{L}}$-threonine (PLT) in cultured cells chronically infected by prions to determine their anti-prion efficacy. While PLE and PLT did not alter the level of $PrP^{Sc}$, PLO and PLH exhibited potent $PrP^{Sc}$ inhibition in ScN2a cells. These results suggest that the anti-prion activity of poly-basic amino acids is correlated with the cationicity of their functional groups. Comparison of anti-prion activity of PLO and PLH proposes that the anti-prion activity of poly-basic amino acids is associated with their acidic cellular compartments.

• Childhood Kidney Diseases
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• v.20 no.2
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• pp.69-73
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• 2016

Purpose: The aim of this study was to compare the clinical and laboratory features of infants with roseola infantum due to human herpesvirus 6 (HHV6) infection and those with urinary tract infection (UTI). Methods: We retrospectively reviewed the medical records of children who were hospitalized at Cheil General Hospital and Women's Health Care Center, College of Medicine, Dankook University, and diagnosed as having HHV6 infection or UTI. Results: Among the infants admitted between September 2014 and May 2016, 92 (male, 45 and female, 47) were included in the study and divided into a HHV6 infection group (n=50) and a UTI group (n=42). The relative risk of UTI compared with that of HHV6 infection increased with pyuria (P<0.001), increased with leukocytosis (mean white blood cell [WBC] count, $15,048{\pm}5,756/mm^3$ vs $87,916{\pm}54,056/mm^3$; P<0.001), increased with C-reactive protein (CRP) level ($4.89{\pm}4.85 mg/dL$ vs $1.04{\pm}1.76mg/dL$; P<0.001), and younger age ($6.3{\pm}3.2months$ vs $18.3{\pm}12.6months$; P<0.001). The relative risk of HHV6 infection compared with that of UTI increased with fever duration ($4.3{\pm}1.7days$ vs $2.8{\pm}1.7days$; P<0.001) and decreased with platelet (PLT) count ($373{\pm}94{\times}10^3/mm^3$ vs $229{\pm}90{\times}10^3/mm^3$; P<0.001). No significant differences were found between the HHV6 groups according to the presence or absence of pyuria. Conclusion: Pyuria, age, fever duration, WBC count, CRP level, and PLT count were the differentiating factors of HHV6 infection from UTI. However, sterile pyuria can occur in children with HHV6 infection. In the presence of pyuria, CRP level and PLT count were the strong predictors of UTI compared with HHV6.

• Proceedings of the Korean Geotechical Society Conference
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• 2008.03a
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• pp.636-643
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• 2008

The objective of this paper is to assess the potential use of the geogauge and the light falling weight deflectometer (LFWD) and the soil impact hammer as quality control/quality assurance $Q_C/Q_A$ devices for compacted soil layers. A comprehensive field experimental program considering variation of number of compaction, water contents and thickness of compaction layer was conducted on compacted layers of gravel sand. The geogauge, LFWD, the soil impact hammer and static load test (PLT) as a reference test were performed for the compacted layers. The geogauge elastic modulus, $E_G$, the LFWD dynamic modulus, ELFWD, empirical soil stiffness, $K_{30}$, obtained from soil impact hammer and soil stiffness directly obtained from PLT, $K_{30}$, were correlated with increasing number of compaction. The results of this study show that the geogauge, LFWD and the soil impact hammer, which are very simple to test, can be used as substituting devices for static PLT which is a conventional quality control/quality assurance $Q_C/Q_A$ devices for compacted soil layers.

• Journal of the Korean Institute of Telematics and Electronics D
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• v.35D no.7
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• pp.48-55
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• 1998

We propose a new static current source model and parameter extraction method for AlGaAs/GaAs HBT. The proposed model has 9 parameters describing internal currents and are experessed with the physically meaningful parameters.The proposed parameter extraction method uses the measured dC IV curves and does not need the gummel plt data and any optimization process. the constructed model based on the proposed method predicts the measured data well.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.1840-1847
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• 2008

PLT where from site is used mainly with compaction maintenance of quality, CPLT and LFWD, in order to be a Young's modulus of using a direct arrival wave executed a site experiment. According to the roller compaction number of times measured the degree which changes and a promise management aptitude evaluation executed.

• Journal of Acupuncture Research
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• v.18 no.3
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• pp.94-104
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• 2001

Objective : The objective of tihs study is to study the effects of anti-cancer, anti-metastasis and effects of immune-response of aqua-acupuncture with Cuscutae Semen infusion solution. Methods : We observed, in-vitro, the cytotoxicity and the effect on the expression of MMP-9 gene, and in-vivo, change of body weight, surviving number, MST, ILS, changes in amount of WBC, RBC, PLT, GOT, GPT, creatinine, glucose and LDH, number of Pulmonary colony. Results : 1. The effect on expression of MMP-9 gene was decreased in all the sample groups in B16-F10 cell line, and was decreased in Lane 1, 2, 3 in HT1080 cell, compared with control group. 2. BALB/c mice which was transpianted S-180 cancer cell line were inhibited significantly in weight increase, in all the sample groups, compared with control group. 3. The sample groups injected in vein with B16-F10 cancer cell line in C57BL/6 mice did'nt show significant change in the number of WBC, RBC, PLT. 4. In immune experiment, all the sample groups showed having more relevancy to the effect on splenic cell proliferation than normal groups. 5. $IFN-{\gamma}$ and $TNF-{\alpha}$ in cytokine-gene were increased in all the sample groups than control group. 6. In flow cytometry of spienic cell, the numbers of CD4+ cell, CD8+ cell and CD19+ cell in sample groups were increased than in control group. Conclusion : Above the results showed that aqua-acupuncture of Cuscutae Semen infusion solution has effects of anti-cancer, anti-metastasis and immune response improvement.

• Biomedical Science Letters
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• v.1 no.1
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• pp.81-88
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• 1995

RDW and MCV are thought to be the highly sensitive blood cell parameters in the differentiation of iron deficiency anemias. Through the medical records of 227 anemic patients and the physical checking results of 143 healthy persons in a General Hospital during the recent five years, the authors evaluated various blood cell parameters including RDW and MCV. Iron deficiency anemia, aplastic anemia and other anemias associated with chronic disease were shown as the three major causes of anemias in Korea. In the patients of iron deficiency anemia MCV was very low(62.9$\pm$13.7fl), while RDW was very high(19.3$\pm$4.8) showing much lower MCV and much higher RDW in severe IDA compared with in mild IDA. To differentiate iron deficiency anemias form other anemias, a discriminant function was developed from some blood cell parameters like MCV, MCH, MCHC, RDW and platelets(D.F.=0.26-0.012MCV -0.130MCH +0.073MCHC +0.052RDW+0.003PLT).

• Proceedings of the KSAR Conference
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• 2001.03a
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• pp.36-36
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• 2001

임신기의 자성 생쥐에 저 농도의 BPA의 투여가 태아의 체중, 태아수 및 성비에 미치는 영향을 검토하고, 태어난 자손의 번식기관무게, 정액성상, 조직검사 및 혈액의 혈구 성분분석등 번식효율과 생리기능에 미치는 영향을 검토하고자 실시하였다. 자성 생쥐에 corn oil(대조구), 0.05, 0.5 및 5.0mg BPA/kg b.w의 용량으로 1회 투여하고 투여 당일 날 웅성 생쥐와 교배 시켰으며, 3일 간격으로 5회 투여하였다. 임신기에 BPA의 투여가 웅성 자손의 체중에 미치는 결과는 각각 30.72, 30.80, 29.80 및 26.80g으로 5.0mg 투여구가 여타구에 비해 통계적으로 유의하게 낮은 체중을 나타냈으며(P<0.05), 정소의 무게는 BPA 투여구가 다소 높은 무게를 나타냈다. 정소상체, 정낭선 및 응고선의 무게는 투여구간에 커다란 차이가 없었다(P>0.05). BPA의 투여후 태어난 웅성 산자의 총정자수, 생존율, 유효정자수 및 기형율에 미치는 영향을 조사한 결과, 각 투여구간에 커다란 차이는 없었다. 또한 웅성 산자의 혈구화학치에 미치는 영향을 조사한 결과, RBC는 BPA 투여구가 각각 10.60, 10.96 및 10.35$\times$$10^{6}$㎣로서 대조구의 9.78$\times$$10^{6}$㎣보다 통계적으로 유의하게 높은 수치를 나타냈지만(P<0.05), WBC, Hb, HT, MCV, MCH, MCHC 및 PLT는 각 투여구간에 커다란 차이는 없었다. 임신기에 BPA의 투여가 자성 산자의 체중에 미치는 결과는 각각 25.56, 25.38, 25.83 및 23.86g으로 5.0mg 투여구가 다소 낮은 체중을 나타냈다. 자궁의 무게는 BPA 투여구가 각각 0.0915, 0.0904 및 0.1016g으로 대조구의 0.0801g에 비해 다소 높은 무게를 나타냈으며, 난소의 무게도 투여구간에 커다란 차이가 없었다. BPA의 투여가 자성 산자의 혈구화학치에 미치는 영향을 조사한 결과, WBC는 5.0mg 투여구가 여타구보다 다소 낮은 수치를 나타냈으며, PLT는 BPA 투여구가 대조구보다 다소 높은 수치를 나타냈지만 커다란 차이는 없었다 RBC, Hb, HT, MCV, MCH 및 MCHC는 각 투여구간에 차이가 없었다. 임신기에 BPA의 투여가 자손의 정소, 난소 및 자궁의 조직, 병리학에 미치는 영향을 조사한 결과, 정소와 난소의 조직에는 각 투여구간에 차이가 없었으며, 자궁에서는 0.5mg 투여구와 5.0mg 투여구에서 자궁내막층이 현저하게 증식된 것으로 나타났다.