곰솔(Pinus thunbergii )에서 소나무재선충병 예방을 위한 나무주사용 약제선발

이상명(Sang Myeong Lee),김동수(Dong Soo Kim),이상길(Sang Gil Lee1),박남창(Nam Chang Park),이동운(Dong Woon Lee) 한국농약과학회 2009 농약과학회지 Vol.13 No.4

大田大學 캠퍼스 마스타플랜

李吉永,李達勳,金尙謙,孫世郁 大田大學校 1987 論文集 Vol.6 No.2

레반다이어트 식품섭취가 비만여성의 신체구성성분, 혈중 렙틴 및 지질수준에 미치는 영향

이규성,유병렬,정락희,김문희,송봉준,이길자 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.2

This study was to varify the effects of levan diet administration on body composition, blood leptin level and lipids components (TC, TG, LDL-C, HDL-C) in obese women during 8 weeks. The subjects of study were divided into 20-29year group (n=15) and 30-39year group (n=15) randomly selected. Administration of Levan Diet in this study was 2 times (breakfast, lunch or dinner) per day, 11tablets per 1times. Statistical method for data processing produced mean and SD of total variable. To analyze difference between groups and periods had executed 2? ANOVA. This study was given conclusion as follows: First, systolic blood pressure showed decrease after administration of levan diet in 30-39years, but it was not statistically significant. Second, body weight and %fat gradually decreased according to the application period of levan diet administration in 20-29years and 30-39years, and it was statistically significant (p<.05). Third, blood leptin level and blood lipid levels (TC, TG, LDL-C) showed decrease after administration of levan diet in 20-29years and 30-39years, but it was not statistically significant. In conclusion, this study shows that the administration of levan diet play a positive role as assistant diet. Therfore, levan diet administration should be recommended as ergogenic aids for these who do obese adults.

구조용강의 유한요소해석 및 온도변화에 따른 피로수명 평가에 관한 연구

이동길,이상열,정재강 朝鮮大學校 機械技術硏究所 1999 機械技術硏究 Vol.2 No.2

본 연구에서는 국산 승용차의 전륜구동축 재료인 S43C와 S5OC를 대상으로 유한요소해석과 회전굽힘피로실험을 통해 고주파열처리와 온도조건에 따른 피로크랙의 발생, 전파거동을 고찰하였다. 유한요소해석 결과 하중이 가해지는 방향에 따라 반복적으로발생되는 인장응격 및 압축응력은 미소원공결함 부분에서 가장 크게 나타났다. 이러한원인은 미소원공결함이 응력의 국부적인 집중원으로 작용했기 때문으로 생각되며, 이러한 응력의 반복으로 인하여 미소원공결함을 기점으로 크랙이 발생∙성장하였음을 알 수있다. 회전굽힘피로실험 결과 두가지 재료 모두 저온(-3O℃) 피로수명은 비열처리재의 경우 상온(25℃)보다 약 110% 증가하였고, 열처리재는 약 120% 증가함으로서 온도의 저하가 피로수명을 크게 증가시킨 반면 고온(80℃) 피로수명은 상온 피로수명과 비교시 비열처리재가 약 35%. 열처리재가 약 5%의 피로수명 감소를 나타냈다. In this study, the rotary bending fatigue test was carried out with two kind of material, S43C and S5OC, using in the front engine and front wheel drive shaft of vehicle. The specimens were heat-treated by high frequency induction method and tested at room(+25℃), high(+80) and low temperature(-3O℃) in order to look over the fatigue crack initiation and propagation behavior by the heat treatment and the temperatures. Based on the FEM result, the tensile and compressive stress repeatedly generated by load direction were largest on the small circular defect due to the stress concentration. So the small crack was initiated and grew from the defect Fatigue lifts of the specimens tested at low temperature showed about 110% for as-received. 120% for heat-treated higher than at room temperature, It was found that low temperature increased so much the fatigue life. At room and high temperature, the fatigue life of as-received specimens were decreased about 35%, but that of heat-treated specimens were decreased about only 5% at high temperature more than at room temperature, Therefore, fatigue life under high temperature will be considered at design of front engine and front wheel drive shaft materials of vehicle.

교각형상에 따른 국부세굴에 관한 실험적 연구

이성대,이현국,신현길,이승훈 한라대학교 2007 論文集 Vol.10 No.-

For geotechnical and economical reasons, various bridge piers have become more and more popular in bridge design. This type of pier can significantly reduce construction costs, compared to spread footer structures when sediment scour is a consideration. However, the scour mechanisms for piles are much more complex, and design of local scour depths more difficult to predict. In this Experiments of local scour around the downward tapering oblong pier with the geometrically nonlinear structurea and a series circular piers are carried out under steady clear water scour conditions. The paper presents the following research results: The scour at a series circular piers is different from that around a single pile, depending on the pile spacing. The interference effect diminishes for pile spacing L_(d)/D=3.5, depending on the pile group arrangement.

사설경호업체 종사자의 직무스트레스와 직무만족과의 관계

이상철,함주일,안길영 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3

The purpose of this study was to identify the relationship between job stress and job satisfaction of employees in private body-guard company. In order to achieve this purpose, the instrument for data collection was a questionnaire in which consisted of questions regarding job stress and job satisfaction. The questionnaire's validity was evaluated by a panel of experts, and its reliability was evaluated by computing the Cronbach alpha values. Since the values ranged from .664 to .816, the questionnaire was deemed to be highly reliable. 220 subjects was selected from several private body-guard companies in Seoul, 2003. Among these selected subjects, 200(90%) responded, and data analyses consisted of employing descriptive statistics, one-way ANOVA, standard multiple regression using SPSS/PC version 10.0. The following results were obtained: First, job stress factors differ statistically and partially according to socio-demographic variables of employees in private body-guard company. Second, job satisfaction factors differ statistically and partially according to socio-demographic variables of employees in private body-guard company. Third, job stress statistically and significantly influenced job satisfaction.

일차배양된 설치류 호흡기 상피세포로부터의 점액소 분비에 대한 수종 약물의 영향

이충재,석정호,이재흔,허강민,박지선,배소현,노삼길,박상철 충남대학교 의학연구소 2003 충남의대잡지 Vol.30 No.2

1. PKC activator인 PMA는 일차배양 HTSE세포로부터의 뮤신분비를 0.1μM 농도에서 30%, 1μM 농도에서 80% 가량 증가시켰다. 2. 식물 유래 성분으로, flavonoid의 일종인 TFR은 일치배양 HTSE 세포로부터의 뮤신분비를 10μM 농도에서 50%, 100μM 농도에서 80% 가량 증가시켰다. 3. 양이온성 폴리펩티드인 PLL 및 PLA는 일차 배양 HTSE 세포로부터의 뮤신분비를 0.01 - 10μM 농도에서 용량의존적으로 감소시켰다. 4. 결론적으로, 본 연구에서 얻어진 결과들은 새로운 거담제 및 점액용해제나 단백분해 효소제가 아닌 호흡기 류신의 생성/분비를 조절해 줄 수 있는 신개념의 약물을 개발함에 있어 극히 일부분이나마 단서를 제공하고 있다고 하루 수 있을 것이다. In the present study, we tried to investigate whether phorbol myristate acetate(PMA), trihydroxymethoxy-flavanone rutinoside(TFR) and cationic polypeptides significantly affect mucin release(secretion) from cultured hamster tracheal surface epithelial cells. Confluent primary hamster tracheal surface epithelial (HTSE) cells were metabolically radiolabeled with 3H-glucosamine for 24 hr and chased for 30 min in the presence of each agent to assess the effect on 3H-mucin release. The results were as follows : (1) Both PMA and TFR significantly increased mucin release from cultured HTSE cells ; (2) Cationic polypeptides including po1y-L-lysine(PLL, mw 7,500) and poly-L-arginine(PLA, mw 10,800) significantly inhibited mucin release from cultured HTSE cells, in a dose-dependent manner. This finding suggests us that PMA and TFR be further studied for the possible use as mild expectorants and cationic polypeptides might function as a regulator for hyper-secretion of mucus, both by direct acting on airway mucin-secreting cells, during the treatment of chronic airway diseases.

發癌物質과 非發癌物質의 DNA-Modifying Activity에 대한 量子生物學的 解釋

李佶俊,林周相,宋寧大,徐榮培,朴柄珏 嶺南大學校 基礎科學硏究所 1990 基礎科學硏究 Vol.10 No.-

LCAOMO calculation has been carried out for thirty chemical carcinogens and nine metabolites of them. The LUMO electron density which is a measure of ability electron to be accepted and observed DNA-Modifying activity which is a measure of mutation relationship was considered. It was found that the sum of LUMO electron density of 1, 2, 4-positions of a relevant trans-butadiene type (F??) in the compound was correlative to DNA-Modifying activity. This means that carcinogenesis closely relate to mutagensis, since the LUMO electron density is a measure of carcinogenic activity of carcinogens as shown earlier. It was also found that LUMO electron density of 1, 2, 4-positions in compounds increase with their metabolic activation. This is in agreement with the experimental result that carcinogen is more electrophilic as metabolic activation. In conclusion, it may be possible to give a theoretical interpretation on the mutation of chemical carcinogens and explain theoretically the fact that the compound have a strong elestrophilicity on metabolic activation.

대청호 대전취수탑 수역에 있어서의 수질특성에 관한 연구

이길영,노장성,허재영 大田大學校 産業技術硏究所 1995 산업기술연구소 論文集 Vol.1995 No.9

In order to survey the cause of the eutrophication in Taechong reservoir, the water body around Taejon intake tower were divided into 5 groups, and the samples were taken to analyse the quality of water, deposits and algae. The relationship between the water quality and the meteorological factors in the study area was investigated and the contamination mechanism in the reservoir was explained. Finally, the relation between T-N concentration and inflow volume was established.

STR3과 STR35 이종마찰용접재의 피로수명 예측에 관한 연구

이상열,김동길,정재강 朝鮮大學校 機械技術硏究所 2001 機械技術硏究 Vol.4 No.1

본 연구에서는 Ni과 Cr이 많이 첨가되어 있는 오오스테나이트계 스테인레스강 STR35와 Si가 많이 첨가되어 있는 마르텐사이트계 스테인레스강 STR3을 마찰용접하여 모재, 열영향부 및 접합선(bond line)에 인공결함을 가공하여 피로크랙 전파거동을 고찰하였다. 평활재의 피로한도시험 결과 STR3의 피로한도는 429.0MPa이며, STR35는 409.4MPa로서 STR3의 피로한도가 약 20MPa이 높게 나타났다. 실험으로부터 얻어진 재료상수를 이용하여 Nisitani의 피로크랙전파속도 예측식에 적용하여 피로수명을 예측한 결과 마찰용접 및 미소원공결함의 위치에 관계없이 약 5%내외의 낮은 오차를 보이며 잘 일치함을 알았다. The fatigue lifes were investigated and predicted for two kind of heat-resisting steels, STR3 and STR35, to look over the fatigue life of dissimilar friction welding zone by rotary bending fatigue test. The mechanical factor. C(2a)^p. proposed by Nisitani, was employed in the present study to compare the results of fatigue life obtained from experiment and prediction. The fatigue lifes were predicted with an equation of the fatigue crack propagation proposed by Nisitani, d(da/dN)=C(2a)^P, the results were found to be within 5.0% error by comparison with experimented results.