김치유래 젖산균의 균체지방산 분석을 이용한 분류학적 연구

이정숙,정민철,김우식,이근철,김홍중,박찬선,이헌주,주윤정,이근종,안종석,박완,박용하,민태익 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.2

표준균주를 포함한 230여개의 김치유래 젖산균에 대한 균체지방산(FAMEs)을 분석하였다. FAMEs profiles는 Euclidian Distance 17.5에 의해 7개의 Major Cluster와 1개의 Single Cluster로 나뉘어졌다. 이중 A, B, C 및 Cluster는 Leuconostoc속으로 분석되어졌고, F는 Lactobacillus속으로 분석되어졌다. 그리고 E와 G cluster는 두개의 Genus가 혼재되어 나타났으며 보충적인 연구가 필요하다. 앞으로 김치유래 젖산균의 균체지방산 분석결과를 기반으로 한 데이타베이스에 95가지 탄소원을 이용하는 수치분류학적 접근방법 및 Pyrolysis Mass Spectrometry 등의 화학적 분석 방법과 분자친화적 연구를 통한 종합적 분류정보 체계가 갖추어지면 젖산균의 신속, 정확한 동정 및 연구에 활발히 이용되어질 것이다. Two hundreds and thirty lactic acid bacteria, mostly isolated from Kimchi, including type strains were sued for analysis of cellular fatty acids. The 230 test strains were recoverd in 7 major and 1 single clusters defined a Euclidian distance of 17.5. These aggregate taxa were equivalent to the genus Leuconostoc (aggregate group A, B, C and D), and the genera Leuconostoc and Lactobacillus (aggregate group G). It is concluded as evident that FAMEs (Fatty Acid Methyl Esters) profile of cell can be used as a criterion in classification of lactic acid bacterial from kimchi. Additional comparative taxonomic studies need to be carried out on well chosen representative strains to determine the most appropriate methods of value.

폴리머 침투콘크리트 휨부재의 거동

이상민,유동우,이용진,변근주 연세대학교 산업기술연구소 1992 논문집 Vol.24 No.1

Polymer-Impregnated Concrete(PIC) is a new polymer-concrete composite material which consists of basic cement concrete and polymer. The mechanical properties and behavior of PIC depend on the type of polymers and the impregnation techniques. In general, the polymer impregnation can improve the strength, durability and ductility of normal concrete. The objective of this study is to develop the analytical procedure for analyzing the structural responses of polymer-impregnated concrete flexural members with different polymer loading by using finite element method on the basis of experimental results.

지문과 정신분열증

우숙희,정국동,최송표,조근자,양은진,김수일,박경란,이영호,김원식 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

Fingerprint patterns of 333 schizophreniacs who met with the diagnostic criterias of International Pilot Study of Schizophrenia except items associated with chronicity in exclusion criteria were studied, and the following results were obtained. 1. The frequency distribution of the fingerprint patterns in the 333 schizophreniacs was ulnar loop, whorl, twinned loop, arch, radial loop in order in both control and schizophrenia groups. 2. Finger ridge counts of both sexes were decreased significantly in schizophrenia group. 3. Dissociation of fingerprint pattern in the schizophrenia group was 51.1%, which was far greater than 6.25% of control group. Number of dissociation was greatest in the thumb, followed by index, middle, ring, and little finger in order. According to the above results, it is considered that both the number of finger ridges and degree of dissociation of fingerprint patterns were closely related with schizophrenia. Analysis of fingerprints and palmprints with the aid of chromosomal analysis would contribute the early diagnosis and prevention of schizophrenia.

Honeycomb 觸媒에 의한 窒素酸化物과 2-CP의 同時除去에 관한 硏究

李宇根 江原大學校 附設 環境硏究所 1993 環境硏究 Vol.10 No.-

도시폐기물 소각로에서 배출되는 질소산화물과 Dioxin類를 동시에 제거하기 위해서 honeycomb型 觸媒를 이용하여 반응온도 200-400℃의 범위에서 질소산화물과 Dioxin類의 前?物質인 2-CP의 同時除去 실험을 수행하였다. 실험결과에 따르면 space velocity 6000 hr^(-1)과 NH₃/NO_(x)比 0.5에서 90%이상의 NO_(x)제거율이 얻어졌으며 space velocity 1200 hr^(-1)에 2-CP가 거의 완전히 분해됨을 알 수 있었다. 동시제거 실험에서는 공존물질에 의한 제거율의 저하는 없었고 2-CP의 경우 단독 제거보다 동시제거 실험에서의 제거율이 더 높음을 알 수 있었다. The removal of NO_(x) and 2-CP was investigated over the temperature range of 200-400℃ by using a honeycomb catalyst, for the purpose of finding the condition to decompose simultaneously NO_(x) and dioxin. The removal efficiency of NO_(x) was 90% at the space velocity of 6,000 hr^(-1) and NH₃/NO_(x) ratio of 0.5. And the removal efficiency of 2-DP was 99% at the space velocity of 1200 hr^(-1). There was no effect in the removal efficiency of NO_(x) and 2-CP by co-existing materials(NO_(x), NH₃, 2-CP etc.) at the simultaneous decomposition. The removal efficiency of 2-CP in the simultaneous decomposition was higher than in the only decomposition of 2-CP.

시간 경과에 따른 부가중합형 실리콘 인상재의 수소 발생

이근우,김경남,고영무 大韓齒科器材學會 1995 대한치과재료학회지 Vol.22 No.1

Clinical reports have indicated that there occurs many bubbles on the surface of the gypsum model because of the hydrogen release from the addition silicone impression materials. Recently the products containing hydrogen absorber have been being developed but not perfect yet. In this study, 4 type Ⅲ dental stones(New fujirock ; G.C., New Plastone ; G.C., MG dental stone ; Maruishi, Suprastone ; Kerr) was poured into the impression of detail-reproducing test block taken using addition-type silicones (Correct VPS ; J/P, Exafine ; G.C., Express ; 3M, Extrude ; Kerr, Provil ; Bayer, Reprosil ; Dentsply) with the intervals of 0, 15, 30, 45, 60, 90 and 120 minutes. Gypsum model was removed from the impressions and the number of bubbles on the surface of casts was counted after 30 min. Ordinal numbers were given to the ranges of the number of bubbles like this, Score 0 ; 0, 1 ; 1∼10, 2 ; 11∼30, 3 ; 31∼60, 4 ; 61∼100, 5 ; 101∼200, 6 ; 201∼400, 7 ; 401 or more. There was no bubble in Correct VPS impression poured immediately in MG dental stone and Extrude impression poured immediately in New Fujirock, New Plastone, and MG dental stone. Significant bubbles were appeared in Provil until 15 minutes(Score 1∼3), Reprosil until 30 minutes(Score 1∼2), and Express until 45 minutes(Score 1∼2) in all gypsum models(p<0.05). Express impression poured in Suprastone(Score 2) and New Plastone(Score 4) had bubbles until 120 minutes(p<0.05). On the basis of this study it can be concluded that not only hydrogen release but also compatibility with gypsum should be considered when using addition silicones.

의사결정지원시스템에서 직관적이고 사용자 친숙한 모델 해결을 위한 모델과 솔버의 유연한 통합에 대한 연구

이근우,허순영 한국경영과학회 2005 한국경영과학회지 Vol.30 No.1

Research in the decision sciences has continued to develop a variety of mathematical models as well as software tools supporting corporate decision-making. Yet, in spite of their potential usefulness, the models are little used in real-world decision making since the model solution processes are too complex for ordinary users to get accustomed. This paper proposes an intelligent and flexible model-solver integration framework that enables the suer to solve decision problems using multiple models and solvers without having precise knowledge of the model-solution processes. Specifically, for intuitive model-solution, the framework enables a decision support system to suggest the compatible solvers of a model autonomously without direct user intervention and to solve the model by matching the model and solver parameters intelligently without any serious conflicts. Thus, the framework would improve the productivity of institutional model solving tasks by relieving the user from the burden of learning model and solver semantics requiring considerable time and efforts.

체육교사의 정신지체학생 지도유형에 대한 하위구조의 신뢰성과 타당성 검증

이현수,이근모,손승우 釜山大學校 附設 體育科學硏究所 2005 體育科學硏究所 論文集 Vol.21 No.2

The purpose of this study was to reliability and validity of the substructure about physical education teachers teaching types to Students with Mental Retradation. The study used to 241 middle school students(male:118, female:123) as subjects for actual analysis with the purposive sampling, except insincere 11 samples......

Earth Anchor의 인발저항력에 관한 연구

이유근,김우중,윤용철 진주산업대학교 1994 論文集 Vol.33 No.-

This paper describes the results of an experimental consideration on the uplift capacity of the earth anchor. The earth anchor used in pull-out test is the cylindrical steel with plate and eight earth pressure cells(No.1~No.8). The plate diameter is 120㎜ and embedment ratios(L/B; L=length of embedment, B=diameter) are 1, 2 or 3, Also, we investigated surface displacement of the test ground using two gap sensors. Pull-out test were conducted for dry sand of soil placed at a density of loose. From the results, the following conclusions were drawn ; Uplift capacity of anchor becomes larger due to the increase in the L/B. The earth pressure act upon the upside of the anchor plate is different in according to place of earth pressure cell and L/B. That is to say, the earth pressure of No.1 or No.2 (earth pressure cell) increases as time goes by until the anchor pull-out completely, but the earth pressure of No.3(L/B≤2) becomes smaller No.1 and No.2 after the rate of increase of the earth pressure decreased by boundary a point of time. The intersecting point of the ground(sand) surface and the end of shear bed is about 15㎝(L/B=1), 21㎝(L/B=2) or 27㎝(L/B=3) by distance from anchor center.

연안부근 복잡지형의 대기유동장 수치실험 1 : 선형이론을 이용한 국지순환모형의 타당성 검토 A Verification of Propriety of Local Circulation Model Using the Linear Theory

이화운,김유근,정우식 한국환경과학회 1999 한국환경과학회지 Vol.8 No.5

A sea/land breeze circulation system and a regional scale circulation system are formed at a region which has complex terrain around coastal area and affect to the dispersion and advection of air pollutants. Therefore, it is important that atmospheric circulation model should be well designed for the simulation of regional dispersion of air pollutants. For this, Local Circulation Model, LCM which has an ability of high resolution is used. To verify the propriety of a LCM, we compared the simulation result of LCM with an exact solution of a linear theory over a simple topography. Since they presented almost the same value and pattern of a vertical velocity at the level of 1 ㎞, we had a reliance of a LCM. For the prediction of dispersion and advection of air pollutants, the wind field should be calculated with high accuracy. A numerical simulation using LCM will provide more accurate results over a complex terrain around coastal area.

Ehrlich 복수암 세포의 지질대사에 관한 연구

이희성,하창우,이근배 중앙대학교 의과대학 의과학연구소 1977 中央醫大誌 Vol.2 No.1

We have studied on lipids of Ehrlich ascites tumor cells (EATC). Lipids were extracted by Kennedy and Kanfer(1964) method and lipoproteins were separated by paper electrophoresis. For the identification and assay of lipid extracts, thin-layer chromatography was employed. The incorporation of ^32P-orthophosphate into phospholipids of EATC was also observed. The results obtained were summarized as follows; 1. The total lipid content of EATC was 47.15 ㎎ per g wet weight; of this 32.2㎎ per g was neutral lipid and 14.95 ㎎ per g was phospholipid. 2. The amounts of neutral lipid fractions of EATC, i.e., free cholesterol, esterified cholesterol, mono-, di-, triglyceride and free fatty acid were 2.06㎎, 1.75㎎, 4.71㎎, 7.15㎎, 10.74㎎ and 2.21㎎, respectively. The amount of triglyceride of EATC was similar to those of normal mouse liver. 3. Phospholipid composition of EATC was phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, phosphatidylserine and unidentified phospholipid, and contents of the individual phospholipids showed that the over-all composition were very similar to normal mouse liver. 4. Lipoprotein fractions of EATC were chylomicron, β-lipoprotein, α-lipoprotein, and prealbumin. Chylomicron fraction contained a larger amount of lipid and α-lipoprotein fraction contained a smaller amount of lipid. 5. The incorporation of ^32P into phospholipids reached a maximum 5 minutes after incubation.