구형 Helicobacter pylori의 중성구 매개 산화활성

홍원선,김혜원,이학성,명승재,정훈용,양석균,김진호,민영일,정명희 대한암예방학회 2000 Journal of cancer prevention Vol.5 No.3

알루미늄合金(A5052-0) 熔接部의 疲勞破壤擧動에 關한 實驗的 硏究

李龍福,元光浩 弘益大學校 1985 弘大論叢 Vol.17 No.2

This research deals with Aluminum-Alloy (A5052-0) weldments. In this research the following conclusions are obtained. 1. when the fatique crack in heat affected zone propagates to base metal zone, total life is long in the following order, base metal, unrestrained weld metal, restrained weld metal, and fatigue crack growth rate is low in the same stress intensity factor range in the following order, base metal, unrestrained weld metal, restrained weld metal. 2. when the fatigue crack in base metal zone propagates to heat affected zone, total fatigue life is long in the following order, restrained weld metal, unrestrained weld metal, base metal, and at first time crack growth rate on base metal is higher than in weld metal but lower at the middle of specimen. 3. In E.C.T. specimen and C.C.T. specimen residual stresses in weldments largely act on fatigue behavior and in E.C.T. specimen mechanical properties of bead zone extend total fatigue life.

사람 위선암에서 cathepsin L의 발현증가

홍원선,홍석일,박인철,손영숙,정훈용,양석균,김해련,민영일 울산대학교 의과대학 1996 울산의대학술지 Vol.5 No.1

cathepsin L은 lysosomal cysteine 단백분해효소로서 기저막(basement membrane)과 세포외기질(extracellular matrix)을 파괴하여 암세포의 침윤과 전이에 중요한 역할을 하는 물질로 알려져 있다. 이러한 cathepsin L에 대한 mRNA 발현도를 5개의 사람 위선암(gastric adenocarcinoma) 세포주와 5명의 위선암 환자에서 채취한 조직에서 방사능으로 표지된 cathepsin L특이 cDNA를 사용한 Northern blot법으로 측정하였다. 위암의 전이병소에서 수립한 세포주인 SNU-5, SNU-16, MKN-45와 Kato Ⅲ에서는 cathepsin L mRNA가 발현되었으나 원발병소에서 수립한 AGS 세포주에서는 mRNA의 발현이 관찰되지 않았다. 5명의 위암 환자에서는 원발병소, 전이가 확인된 임파절 및 암 근처 정상 위점막에서 각각 조직을 채취하여 cathepsin L mRNA의 발현을 측정하였다. 원발병소와 전이병소에서는 모두 cathepsin L mRNA가 발현되었으나 정상 위점막조직에서는 전예에서 mRNA 발현이 관찰되지 않았다. 한편 mRNA의 발현도는 1예에서는 전이병소가 원발병소에 비해 높았으나, 2예에서는 전이병소에서 발현도가 낮았으며, 나머지 2예에서는 원발병소와 전이병소 사이에 차이가 없어, 원발병소와 전이병소 사이에 mRNA의 발현도의 일관성 있는 경향은 관찰되지 않았다. 이상의 결과는 cathepsin L은 위암의 발생과 진행에 있어 암세포의 침윤과 전이를 촉진하는 것 이외에 또 다른 역할을 할 가능성을 시사하고 있다고 사료된다. Cathepsin L, a lysosomal cysteine protease, is known to play an important role in cancer invasion and metastasis by degrading the components of basement membrane and extracellular matrix. The mRNA expression of cathepsin L was determined by Northern blot analysis using a radiolabeled cDNA specific for cathepsin L in five human gastric adenocarcinoma cell lines and five surgical specimens of primary gastric adenocarcinomas, their metastatic lymph nodes and matched adjacent normal mucosae. The mRNA of cathepsin L was expressed in all of the four cell lines established from the metastatic sites, SNU-5, SNU-16, MKN-45 and Kato Ⅲ, while not detected in one cell line established from the primary site, AGS. The mRNA was expressed in all of the five primary and five metastatic cancer specimens tested, while it was not detected in all matched normal mucosae. The intensities of the mRNA expressions, however, did not show the consistent pattern between primary sites and metastatic lymph nodes. These results suggest that cathepsin L may have the other function in addition to facilitation of the invasion and metastasis during the development and progression of stomach cancer.

러시아 법인세의 건전성과 효율성에 관한 연구

성원용, 이백희 연세대학교 동서문제연구원 2000 유라시아연구 Vol.1 No.1

이 글은 체제전환기 러시아 법인세의 구조, 성격, 특징과 한계 등을 살펴보고, 이와 함께 법인세가 러시아 조세체계에서 차지하는 위치와 의미에 대해 재검토하는 것을 그 목적으로 한다. 체제전환 10년이 지났지만 러시아의 조세제도는 아직도 자기완결적인 체계를 갖지 못한 채 '형성' 단계에 머물러있고, 또 그 안에는 수없이 많은 결점들과 자기모순적인 성격이 내재하고 있다. 구체적으로 법인세의 경우 기업의 실제이윤에 대한 과세가 아니라 기업의 이윤을 비정상적으로 과도하게 징수하는 착취형 과세구조를 고 있다. '조세포탈 방지'라는 취지아래 만들어 놓은 법인세 선불지불규정, 정상적인 손금처리를 엄격하게 제한하는 갖가지 제한규정, 고정자산의 실제 내용연수를 무시한 강제적인 감가상각 규정 등이 그 예라 할 것이다. 기업 재무구조의 건전성과 효율성을 제고하고 기업의 현실을 반영하기 위해서는 보다 과감한 법인세 구조의 개혁이 요구된다. 무엇보다도 기업회계 방식을 수용하여 기업회계와 세무회계간의 차를 줄이고 이를 통해 기업의 납부비용과 세무당국의 행정비용을 축소해야 할 것이다. 법인세 자유화의 중요한 본질은 결코 세율 인하에 있는 것이 아니라 새로운 법인세 산정 방식에 있고, 따라서 제품의 생산 및 판매에 지출된 비용 인식, 감가상각 계산, 적자기업에 대한 관계 등에 새로운 접근이 절실하다.

慶北大學校 敎科課程의 改善에 關한 硏究 : The Case of Kyungpook national University

金容圭,李宇一,朴斗元,李慶燮,韓宗烈 慶北大學校 師範大學 1976 敎育硏究誌 Vol.18 No.-

This is the research paper on the curriculum improvement of Kyungpook National University. The curriculum of a college or university is the organized contents of all courses in order to accomplish the educational goals of the higher institution in an effective way. Needless to say, when curriculum is developed, the needs of the society and of the nation where the university is located, should be sufficiently reflected on its development. As an effort toward improving educatioal programs of higher institutions, the Ministry of Education has been encouraging each college or university to engage in the "Pilot Schol Project", a national experimental academic refrom project which was started in 1973 under the sponsorship of the Ministry of Education. In compliance with this policy, Kyungpook National Uuiversity has been not only making its every effort in improving the curriculum by each college within the campus since 1973, but also, continuing its research on the curriculum development in various areas. The research team has been attempted to systematize the direction of the curriculum improvement to meet the needs of the present and of the modern soceity by indicating the particelar characteristics of each college curriculum. This research paper has been focused on testing the validity of the contents of the revised curriculum which covers such areas as the minimum credit hours required for graduation, division making, and sequence of each division, etc.. As a research tool for the purpose of this study, comparative method has been utilized in order to verify the validity of the revised curriculum by means of comparing the above listed items with the current our university curriculum and those of the advanced countries.

高脂肪性食餌로 因한 高脂血症 白鼠에 首烏延壽丹이 미치는 影響

金庸柱,최달영,김준기,박원환 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

This study was done in order to investigate the effect of Suoyensudan on hyperlipidemia. Results: 1. The level of serum total cholesterol was decreased with the significance in the sample groups as compared with the control groups. 2. The level of serum HDL-cholesterol was increased with significance in sample groups as compared with the control groups. 3. The level of serum phospholipid was increased with significance in Sample 1 group as compared with Control 1 group, but Sample 2 group did not show significance as compared with Control 2 group. 4. The level of serum β-lipoprotein was decreased with the significance in Control 1 group, but control 2 group did not show significance. 5. Rate of total cholesterol vs. HDL-cholesterol and total cholesterol vs phospholipid were increased in the sample groups as compared with the control groups. Conclusion; It is considered that Suoyensudan respectively had recovering effect on the Hyperlipidemia induced by cholesterol in male rats. So it can be use to prvent and treat hyperlipidemia and related deseases.

針葉樹材의 1次組織과 2次組織의 微細構造

李元用,金南勳 江原大學校 林科大學 森林科學硏究所 1989 Journal of Forest Science Vol.6 No.-

X線回折法을 이용해 소나무 (Pinus densiflora)의 1次組織과 2次組織의 微細構造의 差를 檢討했다. 그 結果는 다음과 같다. 1. 1次組織과 2次組織에서 (200)面과 (004)面의 面間隔은 差異가 없었다. 2. 1次組織과 2次組織의 相對結晶化度는 各各 23%와 35%로 多少 差異가 있었다. 3. 微結晶의 幅은 1次組織과 2次組織과의 差異가 없었다. 4. 1次組織의 微結晶의 配向은 無配向을 나타냈지만 2次組織의 微結晶은 纖維軸에 20∼25。의 配向度를 나타냈다. The fine structures of the Primary and the secondary tissues in Pinus densiflora were examined by X-ray diffraction method. The results obtained are summarized as follows; 1. D-spacings of (200) and (004) planes had little difference in both tissues. 2. The crystallinity index of the primary tissue as observed was 23%, while that of the secondary tissue was 35%. 3. The lateral crystallite size of both tissues had almost equal values. 4. The crystalline substances of the primary and the secondary tissues showed different patterns of orientation. The former had a random orientation, whereas the latter showed an orientation of 20 to 25.

짧은 균열의 피로성장거동에 대한 연구

최용식,한지원 成均館大學校 科學技術硏究所 1990 論文集 Vol.41 No.2

The short fatigue crack growth behavior of notched specimens was studied with various stress ranges. Crack closure and crack growth experiments were performed on Al alloy 5052-H38. Computer --aided unloading elastic compliance method was employed to measure the closure of short fatigue cracks. The growth rate of short fatigue cracks decelerated with increasing crack length at first, and then accelerated or became non-propagating depending on the applied stress range. Similar deceleration was observed when the growth rate was correlated with the stress intensity factor range △K. But the growth rate of short fatigue cracks could be well represented in terms of the effective stress intensity factor range △Keff. The relation between the crack growth rate and the effective stress intensity factor range for short cracks was identical to that obtained for long cracks.

러시아 농촌의 사회경제적 상황과 농공복합체의 구조 변화

성원용 연세대학교 동서문제연구원 러시아연구소 2002 유라시아연구 Vol.2 No.1

현대 러시아의 농업개혁은 그 동안 축적된 모순들을 해결하고 농업경제의 효율성을 향상시키기보다는 오히려 사회주의 시기 형성된 농업경제의 생산잠재력마저 파괴하는 사태를 초래하고 말았다. 1990년대부터 매년 모든 농업생산량의 절대치가 끊임없이 감소하는 상황이 연출되고 있을 뿐만 아니라 토양이 침식되고, 비옥한 흑토가 유린되는 것부터 시작하여 농업생산의 주체인 농민들의 경작능력이 퇴화되는 현상에 이르기까지 러시아 농업생산력의 전면적인 파괴 과정이 일어나고 있다. 농업부문의 시장개혁에서 우선적 과제는 국가소유의 독점구조를 해체하고, 다양한 소유형태를 창출하는 것이지만 이러한 과제는 단순히 국가소유형태를 폐기하는 것으로 대체되어 버렸고, 결국 모든 경제주체를 사적소유자로 단일화하는 모험주의에 의해 진정한 사적소유자를 창출하기보다는 자영농 발전의 맹아마저 해체시키는 결과를 초래하고 말았다.

유전특성에 미치는 선형 저밀도 폴리에틸렌과 에틸렌 비닐 아세테이트 혼합비 영향

김원종,정의남,임윤희,심낙순,박하용 三陟大學校 2002 論文集 Vol.35 No.-

The physical and electrical properties of electrical insulating materials due to the mixing ratio of linear low density polyethylene(LLDPE) and ethylene vinyl acetate(EVA) are studied. Specimens are selected as LLDPE and EVA of mixing ratio of 50 : 50, 60 40, 70 : 30, 80 20 and virgin. To analyze the physical properties of specimens, Fourier transform infra-red spectrum, X-ray diffraction and differential scanning calorimetry are used. To investigate the influence on dielectric characteristic due to Physical structural change of specimens, we investigated the frequency and temperature dependency of tan f for virgin specimen and mixture specimens in the temperature range of 25[t]~120['c], frequency range of 30[Hz] ~l.5×10s[Hz]. For the value of tan 3, dielectric loss, at each temperature of 35, 75, 100, 120[℃], it is confirmed that as applied voltage increase, α and β peak moved to low frequency area at high temperature area, and also moved to high frequency at low temperature areas, the width of peak widen. it is considered to be caused by the molecular vibration, reduction of side-branch density, reduction of crystalline with increasing temperature.