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Primary intraosseous carcinoma of the mandible
Hwang, Eui-Hwan,Choi, Yong-Suk,Lee, Sang-Rae 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.4
A very uncommon tumor, primary intraosseous carcinoma (PIOC), is a carcinoma arising within the jaw. The definite diagnosis of PIOC is often difficult as the lesion must be distinguished from alveolar carcinoma that may invade the bone from the overlying soft tissues or from the tumors that have metastasized to the jaw from a distant site. A case of PIOC arising in the mandible is presented. The clinical, radiologic, and histologic features are described. This rare lesion should be considered in any differential diagnosis of a jaw radiolucency.
重化學工業機械의 國産化方案에 關한 硏究 : 特히 窯業에 있어서의 燒成爐, 粉碎機, 排風機, 冷却機, 電氣集마器 自動枰量供給器 等의 製作을 目的으로
趙哲衡,朴碩喆,丁太權,宋鐵,桭達福,金基玉,朴煥奎,趙煥從,朴善鐘,金種一,李茂錫 朝鮮大學校 1977 綜合論文集 Vol.1977 No.-
This is to investigate the posibility of home manufacturing of heavy chemical industry machines, such as rotary kiln, crusher, blower, cooler, electrostatic precipitator and weighing feeder of cement plant. It is concluded that even though we can not make all of them (some of them are made now and some others are going to be made in the near future, some of them are made whole and some others are made partially), we can build or export the cement plant by importing the important machines which we can not make now and by substituting them with ours gradually.
열간압연 Monitor AGC에의 H∞ 최적화 기법의 적용
류석환 대구대학교 산업기술연구소 1992 産業技術硏究 Vol.11 No.-
A robust monitor AGC(Automatic Gauge Control) system for a hot strip mill plant of POSCO is designed by minimizing the H∞ norm of a so called mixed sensitivity function. In order to solve the minimization problem, the polynomial approach proposed by kwakernaak[5] is used. The controller performance is tested by a computer simulation under various circumstances.
배영숙,홍영숙,김환권,김이우 中央醫學社 1989 中央醫學 Vol.54 No.10
The effect of intraperitonelly administered nifedipine, an antiphypertensive medication on the mixed-function oxidase system components, such as cytochrome P-450, cytochrome b5, NADPH- and NADH-cytochrome C reductause, p-nitroanisole-O-demethylase, and the formation of lipid peroxide and UDP-glucuronosyltransferase in the spontaneous hypertensive rat hepatic microsomes were investigated. The result is as follows: 1. After 3-7 day of nifedipine injection bidaily, the contents of cytochrome P-450 and b5 were slightly increased and after 4 weeks of nifedipine injection bidaily, the contents of cytochrome P-450 and b5 were increased significantly. 2. After 2 and 4 weeks of nifedipine injection bidaily, the activities of NADPH- and NADH-cytochrome C reductase were increased significantly. 3. After 2 and 4 weeks nifedipine injection bidaily, the activities of monooxygenase, p-nitroanisole-O-demethylase were increased significantly. 4. The formation of lipid peroxide did not change for 4 weeks injection bidaily. 5. After 2 and 4 weeks of nifedipine injection bidnily, the activity of UDP-glucuronosyltransferase was increased markedly.
Capillaria hepatica 感染 마우스에 있어서 間接螢光抗體反應을 이용한 IgG, IgM 및 IgA의 變動에 관한 硏究
李淑環,嚴基善,林漢鍾 고려대학교 의과대학 1987 고려대 의대 잡지 Vol.24 No.3
The immunoglobulin kinetic study was performed to observe the serum IgG,IgM and IgA levels by the method of indirect fluorescent antibody test (IFAT) in Capillaria hepatic infected ICR mice. Antigen used were frozen sectioned eggs in liver tissue and lyophilized embryonated eggs. A total of 98 mice (b.w.15g) was divided into two groups (A,B) and 100 and 1,000 embryonated eggs were infected orally respectively. All mice were bled and killed by retro-orbital puncture prior to infection and at weeks 1,2,3,4,5,6,7,9,11,13,15, and 26 after infection. As negative control sera, 6 mice were used. Fluorescein conjugated anti-mouse immunoglobulins produced in goats (MELOY Laboratories, Inc.) were used as working protein concentration of 500㎍/ml in IgG, IgM and IgA respectively. The antigenic localities were inner membrane of sectioned egg antigen and on the precipitates around the mucoid plugs which were induced by circumoval precipitation reaction. The serum dilution of 16 or over were regarded as positive titer. The results obtained were summarized as follows; 1. IgG titers detected by IFAT using sectioned egg antigen increased at three weeks after infection and kept positive reactions until 13 weeks in light infected group. The titers detected using lyopilized egg antigen showed positive reactions between 3 and 11 weeks after infection. 2. IgM titerd using sectioned egg antigen increased rapidly at two weeks after infection and kept positives until 7 weeks in light infected group and at two weeks until 11 weeks in heavy infected group. The titers detected using lyopilized egg antigen showed positive reactions between 2 and 9 weeks after infection. 3. IgA antibodies were not detected by IFAT in both antigens i.e., sectioned egg antigen and lyophilized egg antigen in all tested sera of ICR mice.
Flowable 및 microfill 복합레진으로 충전된 제 5급와동에서 load cycling 전,후의 미세변연누출 비교
강석호,김오영,오명환,조병훈,엄정문,권혁춘,손호현 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.2
Low-viscosity composite resins may produce better sealed margins than stiffer compositions (KempScholte and Davidson, 1988; Crim, 1989). Flowable composites have been recommended for use in Class V cavities but it is also controversial because of its high rates of shrinkage. On the other hand, in the study comparing elastic moduli and leakage, the microfil had the least leakage (Rundle et al. 1997). Furthermore, in the 1996 survey of the Reality Editorial Team, microfills were the clear choice for abfraction lesions. The purpose of this study was to evaluate the microleakage of 6 composite resins (2 hybrids, 2 microfills, and 2 flowable composites) with and without load cycling. Notch-shaped Class V cavities were prepared on buccal surface of 180 extracted human upper premolars on cementum margin. The teeth were randomly divided into non-load cycling group (group 1) and load cycling group(group 2) of 90 teeth each. The experimental teeth of each group were randomly divided into 6 subgroups of 15 samples. All preparations were etched, and Single bond was applied. Preparations were restored with the following materials (n=15) : hybrid composite resin [Z250(3M Dental Products Inc. St.Paul, USA), Denfil(Vericom, Ahnyang, Korea)], microfil [Heliomolar RO(Vivadent, Schaan, Liechtenstein), Micronew(Bisco Inc. Schaumburg, IL, USA)], and flowable composite[AeliteFlo(Bisco Inc. Schaumburg, IL, USA), Revolution(Kerr Corp. Orange, CA, USA)]. Teeth of group 2 were subjected to occlusal load (100N for 50,000 cycles) using chewing simulator(MTS 858 Mini Bionix Ⅱ system, MTS Systems Corp., Minn, USA). All samples were coated with nail polish 1mm short of the restoration, placed in 2% methylene blue for 24 hours, and sectioned with a diamond wheel. Enamel and dentin/cementum margins were analyzed for microleakage on a sclale of 0 (no leakage) to 3 (3/3 of wall). Results were statistically analyzed by Kruskal-Wallis One way analysis, Mann-Whitney U-test, and Student-Newmann-Keuls method. (p=0.05) Results: 1. There was significantly less microleage in enamel margins than dentinal margins of all groups. (p<0.05) 2. There was no significant difference between six composite resin in enamel margin of group 1. 3. In dentin margin of group 1, flowable composite had more microleakage than others but not of significant differences. 4. There was no significant difference between six composite resin in enamel margin of group 2. 5. In dentin margin of group 2, the microleakage were R>A=H=M>D>Z. But there was no significant differences. 6. In enamel margins, load cycling did not affect the marginal microleakage in significant degree. 7. In dentin margins, load cycling did affect the marginal microleakage only in Revolution. (p<0.05)
치환된 알킬요드화물 또는 크산테이트 화합물과 에틸 아크릴산 또는 메틸 비닐케톤과의 분자간 라디칼 탄소-탄소 결합형성반응
강석구,박영원,박천호,조일환,오원택 성균관대학교 1992 論文集 Vol.42 No.2
생리활성천연물인 lipoxin A, carpenter bee 페로몬, 뇌염모기 페로몬, exobrevicomin 등의 합성의 주요 키탈 중간체들을 치환된 요드화물 또는 크산테이트 화합물과 에틸아크릴산 또는 메틸비닐케톤과의 분자간 라디칼 탄소-탄소 형성 반응에 의해 합성하였다. The chiral building blocks for the synthesis of biologically active natural products such as lipoxin A, carpenter bee pheromone, mosquito ov-iposition pheromone, and exo-brevicomins were synthesized by intermol-ecular radical C-C bond formation of the appropriate substituted iodides or xanthates with ethyl acrylate or methyl vinyl ketone.