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최병석,오지훈,한성국 한국컴퓨터교육학회 2003 컴퓨터교육학회 논문지 Vol.6 No.4
대부분의 웹 기반의 교육 시스템은 교육 정보 제공에만 중점을 두고 있다. 웹이 점차 교육 정보를 제공하는 보편적인 기반이 되어 감에 따라서, 웹은 이제 정보 제공의 차원을 넘어 다양한 서비스를 제공하는 플랫폼으로 변모하고 있다. 이에 새롭게 변화된 웹 환경에 맞는 교육 서비스 모델이 시급히 요청되고 있다. 본 논문에서는 기존의 웹 기반 교육의 여러 한계성을 해결하기 위하여 새로운 기능형 중재자 기반의 교육자원 서비스 모델을 제시하고자 한다. 본 논문의 기능형 중재자기반의 교육자원 서비스 시스템은 웹상에 산재되어 있는 교육 자원들을 효율적으로 관리하고 사용자의 요청에 맞는 교육 서비스 정보를 제공하여 줌으로써, 교육 서비스 자원들의 재사용 효율과 생산성을 높일 수 있다 Most of web-based education systems are only to supply education information. As the web becomes the common basis to support the effective education, it is used for not only applying education information but also developing to the dimension to provide various services. The education service models prospering to the newly diverse environment are necessary. In this paper, a education resource service system based on functional broker is implemented to overcome the weakness of the traditional Web-based instruction. This paper shows that the web-based education service system such as functional broker can manage the varied education resources efficiently and so contribute to realize the life-long education.
hCG에 대한 단일클론 항체 생산과 그 이용에 관한 연구
崔尙勳,李丙哲,李承培 건국대학교 1987 論文集 Vol.25 No.1
This study was carried out to produce monoclonal antibody against hCG secreted by the tr-ophoblast of developing embryo. Produced monoclonal antibody to hCG was regarded as IgG class since it had a strong affinity for a protein A. The concentration of monoclonal antibody in cell culture supernatant and in mouse ascitic fluid was 250㎍ and 30mg perml, respectively. The titer of antibody in mouse ascitic fluid was about 1 : 106~107 on ELISA
직접치수복조재에 따른 비글견 치수의 조직반응에 대한 연구
배지현,김영균,윤필영,조병훈,최용훈 大韓齒科保存學會 2010 Restorative Dentistry & Endodontics Vol.35 No.1
본 연구에서는 인위적으로 노출시킨 비글견의 치수조직을 기존의 수산화칼슘제재와 MTA, 접착성 레진, 광중합형 수산화칼슘제재를 사용하여 직접치수복조한 후 각 재료에 따른 치수의 반응을 광학현미경 하에서 조직학적으로 관찰하여 비교분석하였다. 2마리 비글견의 36개 치아를 이용하여, 실험적으로 치수를 노출시키고 노출된 치수에 치수복조재를 적용한 후 와동은 복합레진으로 충전하여 직접치수복조술을 시행하였다: (1) Mineral Trioxide Aggregate (MTA: ProRoot MTA, Dentsply, Tulsa, USA), (2) Clearfil SE Bond (Dentin adhesive system: Kuraray, Osaka, Japan), (3) Ultra-Blend (Photopolymerized Calcium hydroxide: Ultradent, South Jordan, USA), (4) Dycal (Quick setting Calcium hydroxide: LD Caulk Co., Milford, USA). 희생전 90일, 30일, 7일 전에 각 복조재별로 3개씩의 와동을 충전하였고 비글견을 희생시키고 조직시편을 제작하였다. 시편을 H&E 염색 후 광학 현미경으로 치수염증반응과 경조직 형성 정도를 관찰하였다. MTA 군은 초기에는 경조직 형성이 관찰되지 않고 치수조직의 위축과 부분괴사가 관찰되었으나 시간이 지나면서 경조직 형성이 관찰되었다. Clearfil SE Bond군은 초기에 염증세포의 침윤과 치수세포의 괴사를 관찰할 수 있었고 시간이 지날수록 치수 세포의 괴사가 더욱 진행한 양상을 보였다. Ultra-blend 군과 Dycal 군은 MTA 군과 비슷하게 초기에는 경조직 형성을 보이지 않고 중등도의 염증반응이 관찰되었으며 시간이 지나면서 경조직 형성이 관찰되었다. MTA, 수산화칼슘제재와 광중합 수산화칼슘제재는 초기의 치수염증반응 이후 조상아세포층, 상아질교 형성을 보여 직접치수복조재로 적당하였으며, 접착성 레진은 심한 염증반응과 치수 조직의 괴사 양상을 보여 직접치수복조재로 부적당하다는 결론을 얻을 수 있었다. The purpose of this study was to evaluate the pulp tissue reaction to direct pulp capping of mechanically exposed beagle dogs' pulp with several capping materials. A total of 36 teeth of 2 healthy beagle dongs were used. The mechanically exposed pulps were capped with one of the followings: (1) Mineral Trioxide Aggregate (MTA: ProRoot MTA. Dentsply, Tulsa, USA), (2) Clearfil SE Bond (Dentin adhesive system: Kuraray, Osaka, Japan), (3) Ultra-Blend (Photo-polymerized Calcium hydroxide: Ultradent, South Jordan, USA), (4) Dycal (Quick setting Calcium hydroxide: LD Caulk Co., Milford, USA) at 7, 30, and 90 days before sacrificing. The cavities were restored with Z350 flowable composite resin (3M ESPE, St. Paul. MN, USA). After the beagle dogs were sacrificed, the extracted teeth were fixed, decalcified, prepared for histological examination and stained with HE stain. The pulpal tissue responses to direct pulp capping materials were assessed. In MTA calcium hydroxide, and photo-polymerized calcium hydroxide groups, initial mild inflammatory cell infiltration, newly formed odontoblast-like cell layer and hard tissue bridge formation were observed. Compared with dentin adhesive system, these materials were biocompatible and good for pulp tissue regeneration. In dentin adhesive system group, severe inflammatory cell infiltration, pulp tissue degeneration and pulp tissue necrosis were observed. It seemed evident that application of dentin adhesive system in direct pulp capping of beagle dog teeth cannot lead to acceptable repair of the pulp tissue with dentine bridge formation.
Effects of light spectra on body growth in red spotted grouper, Epinephelus akaara
Byeong-Hoon Kim,Song-Hee Choi,Chi-Hoon Lee,Young-Don Lee 한국발생생물학회 2017 한국발생생물학회 학술발표대회 Vol.2017 No.8
In fish, light (photoperiod, intensity and spectra) is main regulator in many physiological actions including body growth. The present study was to investigate the effect of light spectra on the body growth in red spotted grouper Epinephelus akaara. Experiment performed from December, 2016 to March, 2017 and fish (n=200, body weight 6.9±0.1, total length 7.5±0.1) was reared under different light spectra (blue, green, red and white) for 15 week under 12 hour light and 12 hour dark photoperiod and natural water temperature (13.6~16.7℃). We examined the mRNA expression levels of growth hormone (GH) in the brain with pituitary and photoreceptors mRNA expression in the retina. Red spotted grouper of BW was no different in each for the four groups (light spectra of blue, green, red and white) to five week of rearing period, but BW of rearing blue light spectra group fish was significantly increased in ten week of rearing period. After that, in 15week of rearing period, BW of four group fish was no showed difference respectively. The total length (TL) of fish was no differed in four experimental groups under the experimental duration respectively. The gh mRNA was more highly expressed in rearing blue light spectra group fish than other experimental groups in 15 weeks. The short wavelength sensitive opsin (sws) mRNA was more increased in rearing blue light spectra group fish than other groups in 15 weeks. The middle wavelength sensitive opsin (mws) and rod opsin mRNA expression was no differed in four experimental groups under all experimental durations respectively. The long wavelength sensitive opsin (lws) mRNA expression was more increased in rearing red light spectra group fish than other groups in 15 weeks. Our present results suggest that somatic growth of red spotted grouper is induced under blue light condition under low water temperature duration. Also, these results are thought to be affected of the gh and sws mRNA expression blue wavelength. However, in this experiment we did not confirm the correlation between GH and photoreceptor. Therefore, further studies are needed to clarify the correlation of the light spectra and photoreceptor with body growth in red spotted grouper.