정상인의 입각기에서 발바닥압력측정시 압력중심점의 위치

허재균,박시복,이상건,이강목,김영호,양길태,장윤희 大韓再活醫學會 1998 Annals of Rehabilitation Medicine Vol.22 No.2

Print motor의 特性에 관한 考察

尹良雄,徐在鎬 圓光大學校 1981 論文集 Vol.15 No.1

Print Morer Junior Series is Compact High-quality D. C Motor with uniquue stamped-Conductor disc armatures ideally suited for use in Simple Adjustable speed drives. The armature has insolation placed between armature Conductors stamped from Copper steets, and the ends of the Conductors are to from an armature Circuits. Without iron Core or Commutator Segments, the motor has excellent features of low Commutation reactance good Commutation and no electrical or magnetical unbalance.

誘電體表面의 Corona損에 關한 硏究

徐在鎬,尹良雄 圓光大學校 1981 論文集 Vol.15 No.1

The more the transmission voltage goes up in the high voltage insulation, the more the phenomenon of the surface corona comes out. And in the system of the transmitting electric power, the loss of the space-corona has been considered, and there can be the loss by the surface-corona. We can not ignore the loss, and there was no still the evident examination and study about it. Now, in the space-corona brought by the over head transmitting cable(line), we have used Peeks sguare low(V-Vo)². The purpose of this study is three, one is undertaken in other to search for the relations between the Peeks sguarelaw(V-Vo)² and the loss of the surface-corona, another is to observe the experiment in relation of the dielectric Kinds, a third is in the surface of the dielectrics coated with sillicon oil, or not. By the result of this experiment, I can find that the loss of the surface-corona is like Peek's sguare law(V-Vo)²

산화툴륨의 결함구조와 전기전도성에 대한 연구

최재시,정원양,김진호,이창환 연세대학교 자연과학연구소 1985 學術論文集 Vol.14 No.-

산화툴륨의 전기전도도를 400~1100℃의 온도영역과 10^-6~10^-1atm의 산소분압범위에서 측정하였다. 일정한 산소분압에서 전기전도도의 대수값을 절대온도의 역수에 대하여 도시한결과 직선관계를 얻었으며 inflection point가 나타났다. 활성화에너지는 고온영역에서 34.5kcal/mole, 저온영역에서 19.3kcal/mole이었다. 전기전도도의 산소분압의존성은 직선관계를 나타내었으며 600~1100℃의 온도영역에서 σ∝Po_2^1/5.3, 400~600℃의 온도영역에서σ∝Po_2^1/6.3이었다. 고온영역에서의 주결함은 V_??이며, 저온영역에서는 O_?? 임이 밝혀졌다. 전도도의 온도 및 산소분압의존성을 해석하였으며, 전도메카니즘을 제시하였다. The electrical conductivity of thulium sesquioxide has been measured from 400 to 1100℃ under oxygen partial pressure (Po_2) of 10^-6 to 10^-1 atm. Plots of log conductivity vs. 1/T at constant Po_2 are found to be linear with inflection point and the activation energies obtained from the slopes are 34.5kcal/mole in the higher temperature region and 19.3kcal/mole in the lower temperature region. The Po_2 dependences of the electrical conductivity are found to be linear and closely approximated by σ∝Po_2^1/5.3 in the temperature range of 600-1100℃ and σ∝Po_2^1/6.3 in the range of 400-600℃. The dominant defect is V_?? in the higher temperature region and O_?? in the lower temperature region. The interpretations of conductivity dependences on temperature and Po_2 are presented and conduction mechanisms are suggested to illustrate the data.

다발성 치아우식증 소아에서 타액 단백질의 특성

장희순,최병재,양호정,이승일 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.2

As a part of host factors of dental caries,salliva has been well known for its important role in relation to dental caries.The studies on its physical and chemical charaterisitics on development and progress of dental caries has been condected.Recently,various comparisons between saliva of caries-susceptable individuals and caries-free individuals has been done and the efforts to understand the machanisms of salivary intervention of development and progress of dental caries is actively in progress.In this study,15 children with rampant dental caries and 15 caries free children without any systemic diseases from the ages of 2 to 5 were chosen for the experiment and the whole saliva and parotid saliva from each individuals were collected and protein compared using polyacrylamide gel electophyoresis(PAGE). As results of this study,in parotid saliva,there was no difference in protein compositions between the rampant dental caries and caries free children.While electrophoresis was done with the whole saliva,protein with 120 KDa was found in children with rampant dental caries.However,this protein was not found or unclear,if any for the caries free group.(Exceptionally,clear protein band was present for one person.)Protein compositions of whole saliva rampant dental caries group was compared before and after the caries control and thick and clear protein bands of about 120 KDa were found in both cases.Protein compositions of caries free children and adults were indentical.Quantitative analysis of protein was done for the rampant dental caries group and the control group and no significant difference was found. Taken all together,protein with molecular weight of 120 KDa,found in rampant dental caries group,was still present when the treatment for the dental caries was done so it can be assumed that this protein has no interrelation with the presence of active carious lesions during saliva collecting.It can also be presumed that this specific salivary protein with the molecular weight of 120 KDa found in rampant dental caries group has effect on development and progress of dental caries.Identification on this protein with the molecular-weight of 120 KDa and the role of this protein against dental caries remain to be solved.

다공성 키토산 비드에 의한 중금속(??) 흡착

김태영,문희,양재호 全南大學校 觸媒硏究所 1998 觸媒硏究 論文集 Vol.20 No.-

Chitosan are made by treating chitin with 2N NaOH solution. The chitosan solution was prepared by dissolving chitosan into 2wt% aqueous acetic acid solution and th chitosan beads were made by sol-gel method. The average molecular weight and the degree of deacetylation of the chitosan used here were determined to be ?? and 85%, respectively. Chitosan beads were highly porous which was confirmed by SEM photography and BET. Adsorption equilibrium of ?? porous chitosan beads could be represented by Sips equation. The diffusion of cadmium ions in the chitosan beads could be explained by pore and surface diffusion mechanisms. Adsorption dynamics of ?? in fixed-bed could be simulated by LDFA (linear driving force approximation)

사람주나무잎의 페놀성 성분

안영진,이승호,강신정,황방연,박웅양,안병태,노재섭,이경순 영남대학교 약품개발연구소 1996 영남대학교 약품개발연구소 연구업적집 Vol.6 No.-

A chemical examination of the phenolic compounds in the leaves of Sapium japonicum (Euphorbiaceae) has led to the isolation of eleven phenolic compounds. containing five hydrolysable tannins and six flavonoids. On the basis of chemical and spectroscopic evidences, the structures of these compounds were confirmed to be galic acid(1), 5-O-caffeoyl quinic acid(2), 1-O-galloyl-3, 6-(R)-HHDP-β-n-glucose(coriiagin)(3), 1-O-galloyl-2.4-(R)-DHHDP-βn-glucose (furosin)(4), 1-O-galloyl-2.4-(R)-DHHDP-3.6-(R)-HHDP-β-m-glucose(geraniin)(5), astragalin(6), trifolin(7), afzelin(8), quercetin(9), isoquercitrin(10) and rutin(11). Among them geraniin was the main component.

Electron Microscopic Evaluation of Adhesion of Helicobacter pylori to the Gastric Epithelial Cells in Chronic Gastritis

(Hoon Jai Chun),(Dong Kyu Park),(Chul Hee Park),(Jae Hong Park),(Yoon Tae Jeen),(Soon Ho Um),(Sang Wo Lee),(Jai Hyun Choi),(Chang Duck Kim),(Ho Sang Ryu),(Jin Hai Hyun),(Yang Seok Chae),(Chang Sub Uhm 대한내과학회 2002 The Korean Journal of Internal Medicine Vol.17 No.1

N/A Background : The adhesion of H. pylori to the gastric epithelial cells may be an essential step for the pathophysiology of various H. pylori-induced gastrointestinal diseases. The purpose of this study was to investigate the ultrastructural relation of H. pylori and gastric epithelial cells in their adhesion. Methods : Endoscopic biopsy of gastric antrum and body was performed from 15 patients (9 men, 6 women) with chronic gastritis and H. pylori infection. The specimens were processed for electron microscopy and observed with a transmission electron microscope (Hitachi H-600). Results : On the basis of morphological appearances, the adhesions of H. pylori to the gastric epithelial cells were categorized into three types, filamentous connection, adhesion pedestals and membrane fusion. Coccoid and undetermined forms adhered mainly by the filamentous connection, whereas the bacillary forms adhered primarily by the adhesion pedestals and membrane fusion. Conclusion : Various types of adhesion were associated with H. pylori and gastric epithelium. Further studies are needed to evaluate the influence of different types of adhesion to the pathophysiology of H. pylori.

A New Six-rowed and Covered Barley(Hordeum vulgare L.) Cultivar, "Hyeyang" with BaYMV Resistant, High Yield and Good Malt Quality

Yang Kil Kim,Mi Ja Lee,Seong Bum Baek,Jung Gon Kim,Jong Nae Hyun,Sang Kyun Cho,Jae Seong Choi,Hyoung Ho Park,Jai Hyun Jeung,Hong Jib Choi,Jong Chul Park,Kee Jong Kim,Su Hyun Cho 한국육종학회 2011 한국육종학회 학술발표회 발표요지 Vol.43 No.-

Study on the spectroscopic reconstruction of explosive-contaminated overlapping fingerprints using the laser-induced plasma emissions

Yang, Jun-Ho,Yoh, Jai-Ick The Korean Society of Analytical Science 2020 분석과학 Vol.33 No.2

Reconstruction and separation of explosive-contaminated overlapping fingerprints constitutes an analytical challenge of high significance in forensic sciences. Laser-induced breakdown spectroscopy (LIBS) allows real-time chemical mapping by detecting the light emissions from laser-induced plasma and can offer powerful means of fingerprint classification based on the chemical components of the sample. During recent years LIBS has been studied one of the spectroscopic techniques with larger capability for forensic sciences. However, despite of the great sensitivity, LIBS suffers from a limited detection due to difficulties in reconstruction of overlapping fingerprints. Here, the authors propose a simple, yet effective, method of using chemical mapping to separate and reconstruct the explosive-contaminated, overlapping fingerprints. A Q-switched Nd:YAG laser system (1064 nm), which allows the laser beam diameter and the area of the ablated crater to be controlled, was used to analyze the chemical compositions of eight samples of explosive-contaminated fingerprints (featuring two sample explosive and four individuals) via the LIBS. Then, the chemical validations were further performed by applying the Raman spectroscopy. The results were subjected to principal component and partial least-squares multivariate analyses, and showed the classification of contaminated fingerprints at higher than 91% accuracy. Robustness and sensitivity tests indicate that the novel method used here is effective for separating and reconstructing the overlapping fingerprints with explosive trace.