• 한국약용작물학회지
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• 제16권3호
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• pp.195-198
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• 2008

Karyotypic analysis and FISH (fluorescence in situ hybridization) with 45S and 5S rRNA genes were carried out in Persicaria tinctoria H Gross. The somatic metaphase chromosomes were ranged from 2.25 ${\mu}m$ to 1.50 ${\mu}m$ in length. Chromosome number was 2n = 4x = 40 with the basic number of x = 10. The chromosome complement of the species consisted of 16 pairs of metacentrics (chromososomes 1,2,3,4,6,7,8,9, 10, 11, 12, 13, 15, 18, 19 and 20) and 4 pairs of submetacentrics (chromosome 5, 14, 16 and 17). The karyotype formula was K(2n) = 4x = 32 m + 8 sm. In FISH analysis, three pairs of 45S rRNA gene loci on the terminal region of submetacentrics (chromosomes 5, 16 and 17) and two pairs of 5S rRNA gene loci on the centromeric region of metacentrics (chromosomes 9 and 11) were detected, respectively.

• E2M - 전기 전자와 첨단 소재
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• 제8권6호
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• pp.780-786
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• 1995

For the execution of RIETAN program adopting Rietveld Analysis Method, the sample superconductor is made according to the solid state synthesis method at 920.deg. C for 24hrs, and was examined for the optimization of parameters needed to analyze Rietveld method with the input of the measured pattern data after measuring the pattern resulted from the X-ray diffraction. It was proven that the lattice constant of the superconductor which was consisted of Pmmm orthorhombic crystal structure in the analyzed space group correspond to the presented theoretical lattice constant a=3.8887(8).angs., b=3.8238(4).angs., c=11.7079.angs.. Therefore, it was examined and confin-ned that the R factor, which was compensated after analyzing the structure of superconductor resulted from this experimented data with the computer simulation, was refined to $R_{wp}$=8.83[%], $R_{P}$=6.47[%], $R_{I}$=10.08[%], $R_{F}$=7.19[%], $R_{E}$=3.76[%]. On the basis of these experimental data, the significant parameter such as the scale factor(S) and the zero point shift(Z) and FWHM value(U,V,W) were optimized as follows; S=2.0827E-3, Z=0.2146, U=4.2761E-2, V=1.7983E-2, and W=2.6768E-2.2.2.2.2.2.

• Imaging Science in Dentistry
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• 제53권3호
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• pp.217-220
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• 2023

Purpose: This pilot study was conducted to evaluate half-value layer (HVL) measurements obtained using a semiconductor dosimeter for intraoral radiography. Materials and Methods: This study included 8 aluminum plates, 4 of which were low-purity (less than 99.9%) and 4 high-purity (greater than 99.9%). Intraoral radiography was performed using an intraoral X-ray unit in accordance with the dental protocol at the authors' affiliated hospital: tube voltage, 60 kVp and 70 kVp; tube current, 7 mA; and exposure time, 0.10 s. The accuracy of HVL measurements for intraoral radiography was assessed using a semiconductor dosimeter. A simple regression analysis was performed to compare the aluminum plate thickness and HVL in relation to the tube voltage (60 kVp and 70 kVp) and aluminum purity (low and high). Results: For the low-purity aluminum plates, the HVL at 60 kVp (Y) and 70 kVp (Y) was significantly correlated with the thickness of the aluminum plate (X), with Y=1.708+0.415X (r=0.999, P<0.05) and Y=1.980+0.484X (r=0.999, P<0.05), respectively. Similarly, for the high-purity aluminum plates, the HVL at 60 kVp (Y) and 70 kVp (Y) was significantly correlated with the plate thickness(X), with Y=1.696+0.454X (r=0.999, P<0.05) and Y=1.968+0.515X (r=0.998, P<0.05), respectively. Conclusion: This pilot study examined the relationship between aluminum plate thickness and HVL measurements using a semiconductor dosimeter for intraoral radiography. Semiconductor dosimeters may prove useful in HVL measurement for purposes such as quality assurance in dental X-ray imaging.

• Preventive Nutrition and Food Science
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• 제5권1호
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• pp.20-24
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• 2000

A study was carried out to establish the detection method of irradiated corn, potato, and sweet potato starches. The samples were packed in polyethylene bags and irradiated with 1, 3, 5, 7, 10, and 15 kGy using a Co-60 irradiator. The maximum viscosity of irradiated and unirradiated corn, potato, and sweet potato starches reduced by increase of irradiation dose levels and showed significant differences which clearly showed the effect of irradia-tion dose levels (p<0.05). Regression expressions and coefficients (p<0.000) or corn, potato, and sweet potato starches were y=-38.538x+718.23(r2=0.9761), y=669.97e-0.1372x (r2=0.9820) and y=-42.544x+730.26(r2=0.9939), respectively. Nor-malized parameter A,B and C values showed a dose dependent relationship and were a better parameter for detecting the irradiated starches than that of the maximum viscosity itself.

• 한국광물학회지
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• 제16권3호
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• pp.223-232
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• 2003

리튬2차전지용 양극소재 개발을 위해 Li[L $i_{x}$M $n_{1-x-y}$C $r_{y}$ ] $O_2$를 공침법(co-p.ecipitation method)을 적용하여 각각 $650^{\circ}C$(CR650)와 8$50^{\circ}C$(CR850)에서 합성하였다. 리트벨트 구조분석 결과 계산의 정밀도를 나타내는 R 지수값을 보면 $R_{exp}$에 대한 $R_{wp}$값( $R_{wp}$/ $R_{exp}$)은 CR650과 CR850의 각각에 대해 19.2%/10.1%과 15.9%/9.76%를 보여주며, $R_{b}$값은 각각 10.9%와 8.54%, 그리고 S(GofF)값은 각각 1.9와 1.6으로 계산되었다. 합성된 양극소재는 공간군 R3m의 층상구조(LiMn $O_2$)가 존재하였으며, 전이금속 층 내의 Mn이 Li로 치환되면서(Li[L $i_{1}$3/M $n_{2}$3/] $O_2$) 단사구조(C2/c)의 거대격자(Superlattice) 구조현상도 관찰되었다. 계산된 단위포는 공간군 R3m, CR650이 a=2.8520(2)$\AA$, c=14.248(2)$\AA$, V=100.40(1)$\AA^3$이며, CR850은 a=2.8504(1)$\AA$, c=14.2371(7)$\AA$, V=100.179(8)$\AA^3$으로 각각 계산되었다. 또한 최종 결정된 화학식은 CR650은 Li[L $i_{0.35}$M $n_{0.56}$C $r_{0.09}$] $O_2$, CR850은 Li[L $i_{0.27}$M $n_{0.61}$C $r_{0.13}$] $O_2$으로 각각 구해졌다.다...다..구해졌다.다...다..

• 대한간호학회지
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• 제31권6호
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• pp.1119-1128
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• 2001

This study was designed to identify degrees of self-esteem, health status, and life satisfaction in elderly women and investigate the relationship between these factors. The results will contribute to effective nursing intervention for promoting the quality of life for elderly women. Method: The subjects of this study included 129 elderly women. The data was collected through personal interviews using questionnaires from Nov. to Dec. of 2000. The measurement tools were the self-esteem scale developed by Rosenberg and translated by Byong-Je Jong (1974), the health status scale developed by Young Ja Lee(1989), and the life satisfaction scale developed by Jin Youn(1982). The data was analyzed by the SPSS computer program, and it included descriptive statistics, x2-test, t-test and the pearson correlation coefficient. Result: The conclusions of this study are summarized as follows: 1. There was a significant difference in age (x2=12.952, p=.000), religion (x2=6.140, p=.000), spending money (x2=.7.511, p= .000), living expenses load (x2=16.189, p= .000), and the major support provider (x2=6.539, p=.000), according to general characteristics in the existence elderly women. 2. There was a significant difference in self-esteem (t=7.05, P=.000), Health status (t=-10.09, P=.000), and life satisfaction (t=6.62, P=.000) between the two groups. 3. There was a significant positive correlation between self-esteem and health status (r=.406, P=.000), self-esteem and life satisfaction (r=.524, P=.000), and health status and life satisfaction (r=.504, P= .0000) in elderly women.

• 한국식품영양과학회지
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• 제33권4호
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• pp.700-704
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• 2004

십자화과 쌈샐러드 9종류에 관한 일반성 분과 구조탄수화물인 식이섬유소류(DFi, TDF, IDF, SDF, NDF, ADF, ADL, CHO, hemicellulose)를 측정하였다. 건물 기준으로 이들 쌈샐러드는 단백질과 조지방 함량이 2∼3배 높았으며 조회분의 경우 7배 가량 곡류보다 높았다. TDF 함유량에 있어서 비타민이 24.26%로 낮았으나 청경채가 47.33%였다. IDF는 비타민이 17.75%로 낮았으며 뉴그린이 26.81%로 높았으나 SDF는 뉴그린이 3.20%로 낮았고 청경채가 23.45%로 매우 높았다. 이들 십자화과 채소류의 상관관계는 TDF와 SDF간에는 Y=0.93X＋22.62(r=0.89, p＜0.01), TDF와 ADF간에는 Y=0.97X＋11.04(r=0.85, p＜0.01), TDF와 ADL간의 Y=1.00X＋25.47(r=0.72, p＜0.05)로 유의한 상관을 나타내었다. 따라서 십자화과 채소류는 화학적방법에 의한 ADF, ADL분석을 통해 TDF의 추정이 가능함이 확인되었다.

• 약학회지
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• 제32권1호
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• pp.80-85
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• 1988

QSAR of Salicylic acid derivatives, as anti-inflammatory agent, classified into Group I (not-having-5-phenyl ones) and Group II (having-5-phenyl ones) were investigated by quantum chemical calculations. The results are below: not significant statistically for both of Group I and Group II, but significant for each Group. $potency=-8.46X_{5}+1.639\;n=5\;r=0.77\;se=0.31\;for\;Group\;I.$ $({\pm}4.05)\;({\pm}0.5)$ where $X_5$ means charge of carbon atom bonded to hydroxyl radical. $potency=0.16X_{19}+7427.38HO-6629.85X_{15}+4977.40X_{10}+351.51X_5+3378.84$ $({\pm}0.17)\;({\pm}10.18)\;({\pm}11.70)\;({\pm}33.78)\;({\pm}4.41)\;({\pm}13.13)$ n=7 r=0.99 se=0.019 for Group II. where $X_{19}$ and $X_{15}$ stand for charges of the para carbon and the first carbon atoms in phenyl radical, respectively and $X_{10}$, charge of carboxylic carbon atom, HO, HOMO energy. It seems to be possible to qualitatively predict potency of drug by Pearson's HSAB theory. It means that drug should possess low LUMO energy and high HOMO energy.

• 한국안광학회지
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• 제9권2호
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• pp.211-221
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• 2004

이 논문의 목적은 정시안에 있어서 연령별 각막전면곡률반경의 변화와 분포를 파악하는데 있다. 나안시력이 0.6-1.0 이상을 보이고, 굴절이상도가 등가구면 굴절력 ${\pm}0.75$ Diopter 이하면 3-83세 사이 504명의 정시안을 대상으로 Keratometer를 아용하여 연령에 따른 각막전면곡률반경의 분포변화를 분석하였다. 그 결과는 다음과 같다. 먼저, 각 개인별 분포 변화를 분석한 결과, 첫째, 연령에 따라 선형상관관계식 Y = 0.003x + 7.796(r = -0.26)이 얻어졌고, 평균나이 38.3세에 평균 곡률반경은 $7.68{\pm}0.25mm$이었으며, 전체 대상의 분포 범위는 최소 6.98 mm에서 최대 8.54 mm의 결과를 보였다. 둘째, 각막전면곡률반경의 빈도는 7.61 - 7.80 mm가 36%, 7.41 - 8.00 mm가 78%, 7.21 - 8.20 mm가 96%로 나타났다. 셋째, 남 여 성별에 따른 비교에서 남자 (n = 304, 평균 37.6세, $7.72{\pm}0.24mm$, 범위 7.09 - 8.54 mm)는 여자 (n = 200, 평균 39.3세, $7.62{\pm}0.24mm$, 범위: 6.98 - 8.41 mm) 보다 평균 0.1mm 만큼 크게 나타났다. 또한, 그룹별 평균값의 변화 분석 결과를 정리하면, 첫째, 연령에 따른 관계식은 $Y=-0.0066x^2+0.0227x+7.7282$, 선형 상판계수는 r = -0.90로 나타나 개인별 분석에서의 r = -0.26 보다 큰 수치를 보였다. 둘째, 수직곡률반경과 수평곡률반경은 연령에 따라 모두 감소하였으며, 특히, 수직보다는 수평 곡률반경의 감소가 두드러지게 나타났다(p < 0.01). 셋째, 강주경선과 약주경선의 차이는 저연령군 0.18 mm에서 고연령군 0.08 mm로 나타나 연령이 증가할수록 차이가 좁아지는 양상을 보였다. 넷째, 남 여의 비교에서 남자가 여자보다 8개 군 모두에서 크게 나타나 통계적으로 유의한 차이를 보였다 (p < 0.01). 결론적으로 같은 연령내에서도 개인별 차이가 크지만 연령그룹별 평균값의 변화는 연령 증가에 따라 강주경선, 약주경선 및 그 평균값, 수직곡률, 수평곡률 그리고 남자, 여자 모두에게서 각막전면곡률반경이 감소하는 양상을 보였고, 수직곡률보다 수평곡률의 감소 양상이 두드러지게 나타났음을 발견하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집
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• pp.73-76
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• 2001

We deposited epitaxial $Ba_{0.6}$S $r_{0.4}$Ti $O_3$(BST) films having thickness of 400 nm on MgO(001) substrates, where a 10 nm thick $Ba_{1-x}$S $r_{x}$Ti $O_3$(x=0.1-0.7) interlayer was inserted between BST and MgO to manipulate the stress of the BST films. Since the main difference of those epitaxial BST films was the lattice constant of the interlayers, we were very successful in controlling the stress of the BST films. BST films under small tensile stress showed larger dielectric constant than that without stress as well as those under compressive stress. Stress relaxation was investigated using epitaxial BST films with various thicknesses grown on different interlayers. For BST films grown on $Ba_{0.7}$S $r_{0.3}$Ti $O_3$ interlayers, the critical thickness was about 600 nm. On the other hand, the critical thickness of single-layer BST film was less than 100 nm.00 nm.m.m.m.