계면활성 (界面活性) 아미노싸이클리톨 유도체(誘導體)의 계면화학적 성질

이창섭,손주환 한국유화학회 1987 한국응용과학기술학회지 Vol.4 No.1

Plasma levels of liporoteins were observed in vegetarians and non-vegetarians in order to compare the values between the two groups with different dietary habits, and among different age groups. All 162 vegetarians and 95 non-vegetarians were selected for this study. In detail, male vegetarians subjects were devided into three groups according to their ages, 20's, 30's and 40's. And three control groups were also selected at matching basis. Two groups each were selected for female subjects in their 20's and 40's. All ten groups were adopted and the lipids levels were compared appropriately. Plasma pre-β-lioprotein levels of non-vegetarians were not significantly in all groups. And plama α-liporotein levels of non-vegetarians were higher than the ones for vegetarians as compared with male of 20's, male 30's female of 40's, and it was not significantly as compared with female of 20's. And plasma β-liporotein levels of vegetarians were significantly lower than the ones for non-vegetarians in all groups. Most of plasma liporotein levels measured were found to be lower in vegetarians and tended to be higher age proups of both vegetarians and non-vegetarians. Ans plasma α-lipoprotein levels which is known to be adversely related to atheroscherosis were higher in non-vegetarians, it can be concluded in this study that the plasma lipoprotein levels of non-vegetarians under Korean dietary patterns are quite acceptable.

백록담에 분포하는 한라산조면암의 풍화특성

이창섭,이상배,조태진 한국암반공학회 2007 한국암반공학회 학술대회 및 세미나 자료집 Vol.- No.-

海洋汚染 規制와 防除

이창섭 대한조선학회 1991 大韓造船學會誌 Vol.28 No.1

청소년의 연령별 체격 발달에 관한 연구

이창섭,김재운,남상우 충남대학교 체육과학연구소 2000 體育科學硏究誌 Vol.18 No.1

The purpose of this study was to analyze the tendency of physical development by age in adolescence. For this study, the health documents including 400 students' records were selected from the 4 highschools in Deajon city. In order to analyze the records in health documents, mean and standard deviation were used on SPSS window version 9.0. The results of the study were as follows; First in the growth of height men's Height was greater than that of women by an average of 6.03㎝ during at the age of 8 and 18, but at the age of 11(4th grade in elementary school) and 13(6th grade), women's height surpassed that of men only once. In the case of men, the quantity of annual maximum development(QAMD) was shown at the age of 12 and 13 by an average of 8.03㎝ and that of women, QAMD was shown at the age of 10 and 11 by 6.85㎝. Second, in the growth of weights the weight of men was more than that of women by an average above 10㎏, but there was no case that women's weight surpassed that of men like result of height. In the case of men, the QAMD was shown at the age of 14 and 15 by an average of 7.05㎏, and at the age of 10 and 11 by an average of 6.85㎏ in women. Third, in the growth of chest girth, the size of men was bigger than of women by an average of 4-8㎝, but when women were 14 years old(1 st gade in middle school), they surpassed men's size of chest girth only once. In the case of men, the QAMD was shown at the age of 17(1st grade in highschool) and 18(2nd grade) by an average of 4.56㎝ and in women, during 13(6th grade in elementary school) and 14(1st grade in middle school) by an average of 4.76cm. These results could be interpreted as follow. When the men enter highschool, they have more activities than in middle school to show off their "masculinity". On the Contrary, women' activities in highschool decrease from the middle school. Because they want to keep their "femininity". And Lastly, in the growth of sitting height, the sitting height of men and women increased annually by an average of 2.31㎝ and 3.23㎝. In the case of men and women, the QAMD was shown at the age of 13 and 14 by an average of 3.76㎝ and 5.92㎝. Women's sitting height surpassed that of men at the age of 12(5th grade in elementary school) and 14(1st grade in middle school).

계면활성 (界面活性) 아미노싸이클리톨 유도체(誘導體)의 합성

이창섭,손주환 한국유화학회 1987 한국응용과학기술학회지 Vol.4 No.1

Surface chemical properties including surface tension, Ross-Miles foaming power, foam stabilities, emulsifying properties, emulsion stabilities, effectiveness of dispersion, dispersion stabilites of the quaternary ammonium salt type deoxyaminoimositol derivatives such as sixteen kinds of dimethylafkyl-deoxyscyllo-inosityl- diemethylalkyl-2-deoxy-2-myo-inosityl, dimethylakyl-2-deoxy-2-epl-inosityl and dimethylalkyl-4-deoxy-4-myo-inosity1 ammonium chlorides are tested. And critical micelle concentration of these compounds are estimated from the curves of surface tension and concentration. The experimental results show that the members of this class of compounds have necessary surface active properties to make them effective surfactants.

화석연료중 산소포함 헤테로고리화합물의 분해제거를 위한 HDO촉매의 특성 및 촉매반응 연구

이창섭,박종보,최정우,이경희 한국자동차공학회 1996 한국자동차공학회 학술강연초록집 Vol.1996 No.10

Mo 단결절 표면에 황을 흡착시켜 형성된 상충구조를 AES와 LEED로써 연구하였다. 황의피복률은 sulfur gun으로부터 생성되는 S₂flux로써 조절하였으며, 여러 가지 흡착된 황의 상층구조를 LEED에 의해 관찰하였다.황하된Mo 표면에서 탈산소반응(HDO)의 모델 분자로서,Futan의 흡착과 반응을 승온반응분광법(TPRS)으로 조사하였다. 낮은 온도에서 Furan분자의 혜테로 원자는 직접 이탈하여 안정한 기체상의 반응 생성물인 일상화탄소를 향성하였으며, 이 반응은 Mo의 (100) 및 (110) 면에서 각각 깨끗한 표면 및 황화된 표면에 관계없이 일어났다. 이를 바탕으로 Mo 표면에서Furan의 분해반응에 대한 메카니즘을 제안하였다. 또한??-Alumina를 담체로한 분망상의 촉매를 제조하여 촉매의 표면특성을 조사하였으며, Furan분자를 흡착시켜 흡착구조 및 온도에 따른 분해반응을 연구하였다.

고속 직기용 복합재료 헤들 프레임의 설계에 관한 연구

이창섭,오제훈,이대길,Lee, Chang-Seop,O, Je-Hun,Lee, Dae-Gil 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.2

The up and down speed of heddle frames that produce woven cloth by insertion of weft yarns between warp yarns has been increased recently much for productivity improvement, which induces higher inertial stresses and vibrations in the heddle frame. the heddle frame is required to reduce its mass because the heddle frame contributes the major portion of the stresses in the heddle frames during accelerating and decelerating. Conventional aluminum heddle frames have fatigue life of around 5 months at 550rpm due to their low fatigue flexural strength as well as low bending stiffness. In this work, since carbon/epoxy composite materials have high specific fatigue strength(S/p), high specific modulus(E/p), high damping capacity and sandwich construction results in lower deflections and higher buckling resistance, the sandwich structure composed of carbon/epoxy composite skins and polyurethane foam were employed for the high-speed heddle frame. The design map for the sandwich beams was accomplished to determine the optimum thickness and the stacking sequences for the heddle frames. Also the effects of the number of ribs on the stress of the heddle frame were investigated by FEM analyses. Finally, the high-speed heddle frames were manufactured with sandwich structures and the static and dynamic properties of the aluminum and the composite heddle frames were tested and compared with each other.

Ferric sulfate를이용한 치수절단술 후 성견 치수의 조직반응에 관한 연구

이창섭,임철승,박주철,이상호 대한소아치과학회 2000 大韓小兒齒科學會誌 Vol.27 No.2

본 연구의 목적은 성견 치아에서 ferric sulfate로 치수절단술을 시행하고 상부 이장재의 영향을 최소화한 후에 잔존 치수 조직 반응을 formocresol을 사용한 군과 조직병리학적으로 비교 평가하는 것이다. 생후 6~7개월, 체중 10~12Kg 정도의 성견 5마리의 전치 40개에 5급 와동을 형성하여 치수절단술을 시행하였다. 치수를 formocresol과 ferric sulfate를 이용하여 복조를 시행하고 IRM으로 밀봉하였다. 실험동물으 3일, 1주, 2주, 4주, 그리고 8주 후에 관류 고정하여 희생되었으며, 표본을 광학현미경으로 관찰하여 다음과 같은 결론을 얻었다. 1.Ferric sulfate군과 formocresol군 모두에서 치수절단술 후에 염증 반응을 보였지만 ferric sulfate군에서 현저히 감소된 염증 양상과 빠른 치수조직 회복소견을 보였다. 2.Ferric sulfate군에서 치수절단술 후 치수 측벽의 상아모세포의 배열 양상은 초기에는 치관부 1/3에 불규칙한 배열양상을 나타내었지만 2주 후부터는 대체로 회복된 양상을 보였다. 그러나 formocresol군에서는 불규칙한 배열양상이 실험기간 동안 지속되었다. 3.치근을 따라 넓고 길게 형성된 수복상아질층이 formocresol군 8주의 1개 치아에서 나타났으며 상아질교의 형성은 ferric sulfate군 8주의 2개 치아에서 관찰할 수 있었다. 주요어 : Ferric sulfate, formocresol, 치수절단술, 치수조직반응

대학생의 정치적 태도에 관한 연구

이창섭,이종호,김헌 충남대학교 체육과학연구소 2000 體育科學硏究誌 Vol.18 No.1

The purpose of this study was to analyze and compare three individual facets of political attitudes by a university student classification and gender, exercise experiences. The subjects were 402 university students randomly chosen from various student classifications 165 students were among physical education department and 237 among general department students. For the purpose of this study, this study used a survey instrument modified by the researcher and based on the various variables identified in an extensive review of related literature. The survey instrument contains three factors; political orientation, political participation and political interest. An independent samples t-test was used to analyze the col1ected data. The results revealed that significant differences were found between the perception of the two types of students on the dimensions political interest : (1) Regarding the comparison of political orientation between university student classification, physical education students showed slightly more progressive than the other university student group ; (2) Pertaining to the comparison of political participation and political interest between university student groups, physical education students showed higher than the other group. According to gender, significant differences were existed in the two factors, political orientation and political participation. No significant differences was existed between athletes and non-athletes in the three facets of political attitudes.

Human Papillomavirus에 감염된 에이즈 환자에게 발생한 항문암 2예

이창섭,박완범,이기덕,장희창,강철인,박소연,김지현,김홍빈,오명돈,최강원 대한감염학회 2005 감염과 화학요법 Vol.37 No.1

We report two cases of anal cancer in patient with acquired immunodeficiency syndrome infected by human papillomavirus (HPV). One patient presented with huge anal abscess of long duration which developed after incomplete resection of anal warts 2 years ago and the other patient presented with anal bleeding. They were diagnosed as having anal squamous cell carcinoma. Highly oncogenic HPV 69 and 16 were detected by HPV-DNA chip on the previous specimen of warts and anal cancer tissue, respectively. The possibility of anal cancer should be considered in patients infected with human immunodeficiency virus who present anal problems such as anal abscess, anal bleeding, or condyloma accuminatum in anus. 항문암은 HIV 감염자에게 발생하는 빈도가 비감염자에 비해 더 높다. HIV 감염자에게 항문암의 발생 빈도가더 높은 까닭은 항문 성교와 이로 인해서 발생하는 human papillomavirus (HPV) 감염이 이들 환자에게 더 흔하기 때문이라고 생각한다. 항문의 농양, 첨규 콘딜로마로 내원한 HIV 감염자에게서 항문암을 진단하였으며, 이환자로부터 2년 전에 수술로 떼어낸 첨규 콘딜로마 조직에서 HPV 유전형 69를 발견하였다. 또한, 항문 출혈로병원을 방문한 HIV 감염자에게서 항문암을 진단하였으며, 조직 생검으로 얻은 종양 조직에서 HPV 유전형 16를발견하였다. HIV 감염자에게 항문의 농양, 첨규 콘딜로마, 항문 출혈 등의 임상 증상이 발생하면 HPV와 관련된항문암을 감별해야 하겠다.