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중성자회절을 이용한 Nd₃Ba_(5)Co₄O_(15)상의 Rietveld 정산
송수호,이재열 영남대학교 재료기술연구소 2000 재료기술연구 Vol.1 No.1
The refined crystal structure of Nd₃Ba_(5)Co₄O_(15) by Rietveld analysis with X- ray diffraction data had been reported by us . But some parameters, such as oxygen thermal unisotropy had not refined due to accuracy of the electron scattering. In this study the crystal structure and magnetic properties of Nd₃Ba_(5)Co₄O_(15) have been investigated using Neutron diffraction powder data by means of Rietveld method. The starting model was based on the Nd₃Ba_(5)Co₄O_(15) structure. The crystal system was hexagonal, space group P6₃mc, a=11.6407(12), c= 6.8524(3). Final R values are : R_(wp)=0.171, R_(p) =0.153. This compound showed paramagnetic behavior in their magnetic susceptibility vs. temperature plots.
The Effects of Globalization on Korea
송수호,김도희 한국학술연구원 2022 Korea Observer Vol.53 No.1
There are a plethora of studies on globalization, yet few studies have examined the overall effects of globalization on Korea. Thus, in this study, we investigated the overall effects of globalization on Korea's economy, society, language, and culture. The Korean economy enjoyed further growth as globalization facilitated trade expansion. Yet, income inequality and wealth gap deteriorated. Globalization is expanding generational gap as the younger generation introduces changes in language usage. Social culture is altering from Confucianism and collectivism to individualism and materialism particularly among young people. International marriages raise many social issues as well. Children born in international or interethnic couple experience serious identity confusion, requiring the government's and society's support. Gender equality and low childbirth are serious problems for future economic growth. In summary, globalization helped Korea's economic growth, yet introduced many other issues.
ELISA법으로 측정한 소아 혈중 LEPTIN 치에 관한 연구
송수호,정용헌,Song, Soo-Ho,Chung, Young-Hun 대한소아소화기영양학회 2000 Pediatric gastroenterology, hepatology & nutrition Vol.3 No.2
목 적: Leptin은 지방세포에서 분비되어 hypothalamus에 작용함으로써 식욕과 에너지소모를 조절한다고 알려졌다. 그러나 비만아에서는 Leptin 수용체의 저항성 증가에 의해 비만이 지속된다고 보고된다. 최근들어 국내에서도 비만아에서의 Leptin 농도에 대해 많은 연구가 이루어지고 있으나 그 결과가 일치하지 않고 대부분의 연구는 Leptin RIA kit를 이용하여 이루어진 바 저자들은 human leptin ELISA kit를 이용하여 혈중 leptin 농도를 측정하여 ELISA법의 유용성을 규명하고 비만아와 정상아 및 연령과 성별에 따른 차이를 비교해 보고자 본 연구를 실시하였다. 방 법: 1999년 2월 1일부터 1999년 6월 30일까지 충남대학교병원에 내원한 아동을 대상으로 총 67명(남아 41명, 여아 26명)의 소아를 무작위로 추출 하였다. 1999년도 대한소아과학회의 신장별 표준체중치를 이용하여 각 연령별, 성별 신장대비 표준체중의 120% 이상 되는 환아를 비만으로 정의하여 비만아동 19명(남아 12명, 여아 7명)과 정상아동 48명(남아 29명, 여아 19명)으로 분류하였다. 67명의 대상아동에 대해 신장, 체중, 비만도, 체질량지수를 조사하고 ELISA법을 이용하여 Leptin 농도를 측정하였다. 이것을 비만군과 정상군, 체질량지수별, 성별, 연령별로 나누어 비교분석 하였다. 결 과: 1) 정상아의 평균 Leptin 치는 $7.69{\pm}8.83\;ng/ml$이었다. 2) 비만아에서 평균 Leptin 치는 $36.34{\pm}18.57\;ng/ml$이었다. 3) 체질량 지수가 20 이상인 군에서 20 미만인 군보다 혈중 leptin 치가 유의하게 높았다(p<0.01). 4) 10세 이상인 군에서 10세 미만인 군보다 유의하게 높았다(p<0.01). 5) 남녀간의 혈중 leptin 치는 유의한 차이가 없었다(p>0.05). 결 론: ELISA법을 이용한 혈중 leptin 치는 RIA법을 이용한 혈중 leptin 치와 같이 비만한 군에서 높게 나타났으며, 이에 관련된 인자로는 비만도, 체질량 지수 및 연령 등이 있었다. 특수 시설이 필요한 RIA법보다 일반 검사실에서 용이하게 측정할 수 있는 ELISA법이 널리 활용될 수 있을 것으로 사료된다. Purpose: Leptin is an adipocyte-derived blood-borne satiety factor that acts on its cognate leptin receptor in the hypothalamus, thereby regulating food intake and energy expenditure. We measured the leptin concentrations in serum of normal and obese children with human leptin ELISA kit, unlike previous study with leptin RIA kit and investigated the relationship between leptin concentrations and body mass index, gender, and age. Methods: We measured serum concentrations of leptin in 67 children who were visited to the Department of Pediatrics, Chungnam National University Hospital during the period of 5 months from February, 1999 to June, 1999. Height, weight, obesity index, and body mass index were measured in 67 subjects. Leptin values in serum were measured by sandwich ELISA method. Data analysis was done according to the obesity, body mass index, gender and age. Results: The mean concentration of leptin was $7.69{\pm}8.83\;ng/ml$ in normal children group and $36.34{\pm}18.57\;ng/ml$ in obese group. Serum leptin concentrations were significant correlation with the body mass index (p<0.01). Serum leptin concentration was significant higher in the group of over 10 years of age (p<0.01). Leptin levels showed no significant difference by gender. Conclusion: Serum leptin levels were significantly higher in obesity group than in control one, and they were correlated with body mass index and age. Measurements of leptin value by sandwich ELISA method are very useful and easily applicable to determine obesity.
MOD법에 의해 제조된 $NO_x$ 가스용 반도체 박막센서의 특성
송수호,송민석,이재열 한국전기전자재료학회 1998 전기전자재료학회논문지 Vol.11 No.11
$WO_3$ based semiconduction sensor have been reported to have excellent sension properties to $NO_x$ gases by many researchers. In this study appropriate $WO_3$ precursor have been chosen and thin film sensors were fabricated by metallo organic deposition process. Their sensing characteristics were investigated as a function of NO concentration, heat treatment, and measuring temperature. Tungsten dichloro triethoxide was found to be a good precursor for $WO_3$ thin film in this method. Samples heat treated at $600^{\circ}C$ showed sensitivity (S) 200 to 50 ppm NO gas when measuring temperature was $150^{\circ}C$.