이중액막에 의한 우라늄(VI)연속추출의 해석

현영진 濟州大學校 産業技術硏究所 1995 산업기술연구소논문집 Vol.6 No.-

The uranium(V1) extraction in the continuous vessel was carried out with the flow rates of continuous and organic phase. The initial concentration of uranium(VI) in the external aqueous phase was 1,000 ppm. The mechanism of batch uranium(VI) extraction through the double liquid membrane mediated by DzEHPA was interpreted by the corrected Advanced Front Model. The continuous uranium(VI) extraction was analyzed by the extraction efficiency due to the above model. The times required for uranium(VI) extraction equilibria decreased with the increase of flow rates in the continuous phase under the constant flow rates in the organic emulsion phase. On the other hand, the times required for uranium(VI) extraction increased with the increase with the increase of flow rates in the organic emulsion phase under the constant flow rates in the continuous phase. Therefore the extent of uranium(VI) extraction decreased with the decrease of the times required for the uranium(VI) extraction equilibria. The main operating variable to increase the uranium(VI) extraction efficiency was proved to be the flow rates of continuous phase. The prediction of the optimum operating conditions for the increase of uranium(VI) extraction satisfied with the decrease of the times required for the uranium(VI) extraction equilibria was necessary for this experiment.

女性 能力 開發을 위한 女性學課程 設置의 提案

玄永學,鄭世華,李男德,李效再 이화여자대학교 한국문화연구원 1976 韓國文化硏究院 論叢 Vol.28 No.-

For the past 20 years, there has been a substantial increase in the percentage of women going to colleges and universities in Korea: the statistics indicate that the male and female ratio changed from 87.3% to 12.2% in 1952 to 73.9% to 26.1% in 1974. Inspite of the increasing trend, some academic observers recently began to voice their opinions against higher education for women on the basis that Korean women, regardless of their education in an occupation or public life. The following trends partially support this opinion. First, the tendency of female students concentrating their major fields on a limited number of specializations, such as teachers' education, language, arts, nursing and medical technology, is a contrasting phenomenon with male students, who are more or less evenly distributed throughout all the areas of specialization as their major fields. Second, the remarkable increase in female labor participation for the past 10-15 years is largely contributed by women in the agricultural sector and manufacturing industries, as the percentage of women with higher education have shown not as much of an increase in the labor market as that of these with elementary level or less education. Furthermore, the percentage of women in professions and managerial occupations which would require college education for qualification toward has decreased from 2% in 1960 to 1.8% in 1970. Thirdly, a survey of Ewha graduates concerning their attitudes toward women's social role and college education presents revealing results of their conservatism and resignation sex equality and occupational roles. These findings certainly contradict the egalitarian principles of modern higher education and human potentials. However, there are now growing trends among female college students, with the awareness of changing sex roles, of taking seriously their future occupations and other social roles in addition to marriage. They are showing a greater concern for developing their potentials for professions and egalitarian roles for society, realizing the need for overcoming socio-cultural limitations as well as personal inertia. These are signs calling for new directions in women's education in Korea by introducing women studies programs which are designed to liberate women from the culturally conditioned state of self-awareness and the traditional status and role.

이중액막에 의한 우라늄(VI)연속추출의 해석

현영진 濟州大學校工科大學産業技術硏究所 1995 尖端技術硏究所論文集 Vol.6 No.-

외수상 우라늄(VI)농도를 1,000ppm으로 유지하고 에멀젼 유기상의 유속과 연속상의 유속을 변화시키면서 연속식 추출조에서 우라늄(VI)추출을 수행하였다. 우라늄(VI)이 D₂EHPA담체함유 이중액막에 추출되는 기구는 Corrected Advanced Front Model에 의해 해석되었다. 이 해석기구에 기초하여 연속식 우라늄(VI)추출모델을 설정하여 실험치와 비교하였다. 본 실험범위에서는 연속상의 유속과 에멀젼 유기상의 체류시간이 우라늄(VI)추출효율에 기여하는 조업변수임을 확인하였다. 연속식 우라늄(VI)추출시 에멀젼 유기상 유속을 일정하게 유지하여 연속상 유속이 증가할수록 추출평형에 빨리 도달하였다. 한편 연속상 유속을 일정하게 유지하여 에멀젼 유기상 유속의 증가할수록 추출평형에 늦게 도달하였다. 우라늄(VI)추출평형에 도달하는 시간이 빠를수록 우라늄(VI)의 추출효과가 감소하였다. 우라늄(VI)추출향상에 영향을 미치는 주 정상조업변수는 에멀젼 유기상의 체류시간이 아니라 연속상 유속으로 나타났다. 본 연구에서는 D₂EHPA담체함유 이중액막에의한 우라늄(VI)연속추출시 추출평형에 이르는 시간이 빠르면서 추출효과를 향상시킬수 있는 최적조업조건 추산이 주요과제로 제시할 수 있었다. The uranium(VI) extraction in the continuous vessel was carried out with the flow rates of continuous and organic phase. The initial concentration of uranium(VI) in the external aqueous phase was 1,000 ppm. The mechanism of batch uranium(VI) extraction through the double liquid membrane mediated by D₂EHPA was interpreted by the corrected Advanced Front Model. The continuous uranium(VI) extraction was analyzed by the extraction efficiency due to the above model. The times required for uranium(VI) extraction equilibria decreased with the increase of flow rates in the continuous phase under the constant flow rates in the organic emulsion phase. On the other hand, the times required for uranium(VI) extraction increased with the increase with the increase of flow rates in the organic emulsion phase under the constant flow rates in the continuous phase. Therefore the extent of uranium(VI) extraction decreased with the decrease of the times required for the uranium(VI) extraction equilibria. The main operating variable to increase the uranium(VI) extraction efficiency was proved to be the flow rates of continuous phase. The prediction of the optimum operating conditions for the increase of uranium(VI) extraction satisfied with the decrease of the times required for the uranium(VI) extraction equilibria was necessary for this experiment.

Nocodazole 투여에 따른 척수신경절세포 미세소관의 변화

박정현,이융창 대한해부학회 1995 Anatomy & Cell Biology Vol.28 No.2

朝鮮後期 建築圖에 表現된 視方式 및 空間槪念 分析

이현식,온영태 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The purpose of this study is to find out design concept and formative intention shown on the architectural site configuration in late Chosun Dynasty. During the 18th century, changes in cultural context increased interests in traditional/local and natural aspects. New visions on aesthetic sense might make impact to architectural site configuration and space composition. In particular, among the formative specifics presented in architectural paintings, methods of visualization and spatial concepts are studied, through the comparative analysis with architectural site configuration, formative intention. As a result, the fact that various methods of visualization and spatial concepts are reflected in architectural site configuration is revealed.

케일 쥬스에 의한 AFLATOXIN B_1의 유전독성 억제 효과

최영현,박건영,이선미,유미애,이원호 부산대학교 유전공학연구소 1995 분자생물학 연구보 Vol.11 No.-

The inhibitory effect of the fresh juice of kale on the genotoxicity induced by aflatoxin B_1 (AFB_1) in Salmonella and Drosophila was investigated. The kale juice had strong inhibitory activity for His^- to His^+ reverse-mutations induced by AFB_1 acting on S. typhimurium TA100. A similar inhibitory effect was detected in somatic cell mutation assaying system of D. melanogaster. Using the wing hairs spot test, we found that the formation of mutant hairs in adult flies as a result of feeding with AFB_1 in their larval stages was efficiently inhibited by coadministration of the fresh juice of kale, which revealed that it can inhibit gene mutation, deletion and mitotic chromosomal recombination. These results seem to suggest that kale juice may exert its inhibitory effect to mutagenic and/or carcinogenic properties of DNA damaging agents.

N-hydroxypropy 1 chitosan과 N,O-hydroxypropy1 chitosan의 합성 및 액정성에 관한 연구

마영대,정종현 단국대학교 1999 論文集 Vol.34 No.-

N-hydroxypropyl chitosans(N-HPCTOs) were prepared by reaction of chitosan with propylene oxide in the solvent mixture of water and ethanol, The derivatives with different total degree of substitution(DS) and molar substitution(MS) were obtained by adjusting the molar ratio of propylene oxide to glucosamine unit, the reaction pressure, the reaction temperature, and the reaction time, N.O-hydroxypropyl chitosan(N.O-HPCTO) was prepared by reaction of alkali N-HPCTO with propylene oxide in an autoclave at 70℃. The MS value and the site of substitution were determined by the FT-IR and ^1H-NMR analysis. Both the DS and the MS values of N-HPCTOs were found to be less than 2, indicating that it is difficult to add propylene oxide to the hydroxy groups in the side chain or to the amino groups in the main chain under all the experimental conditions studied. On the other hand, the DS value of N,O-HPCTO is less than 4 but the MS is larger than 4, showing that the propylene oxide molecules became more and more difficult to reach the main chain as the side chain grew. By optical microscopic observation, N.O-HPCTO, which is soluble in water as well as common organic solvents, were found to form both thermotropic and lyotropic phases. However, all the N-HPCTOs, which are soluble in the specific solvents such as water, a alcohols and formic acid, do not form thermotropic liquid crystal phases but form lyotropic phases.

규칙기반 온톨로지 인스턴스 자동생성

윤현주,변상용,김장형,변영철 제주대학교 공과대학 첨단기술연구소 2004 尖端技術硏究所論文集 Vol.15 No.2

In this paper, we propose a method generating of instance ontology from web pages for the lodge. First, we analyze non-structured web documents and generate information extraction rules in order to extract specific informations from web sources. And we extract the informations from various web pages related to lodge using generated rules. And then ontology instances are automatically generated through adding OWL semantic information to the extracted informations. Our method is able to cut down on time and cost than a method which generates various ontology instances manually. Also agents can search the information corresponding to semantically what the user needs in the various web pages using numerous vocabulary having same meaning and provide good quality of informations to user.

고객 파트너 십이 CRM성과에 미치는 영향에 관한 연구 : 관계시스템과 신뢰의 역할 The Role of Relational Systems and Trust

이현수,이유진,서영호 한국품질경영학회 2004 품질경영학회지 Vol.32 No.1

In recent studies, there has been much interest in the relationship between customer partnership and its effect on CRM success. Yet, there is little empirical work on it. This study empirically examines the relationship between customer partnership and CRM success in Korean companies. The findings indicate that the success of the relational systems(information technology and education/reward) is significantly related to trust to customer and customer partnership. The study also provides empirical evidence that trust and customer partnership is positively related to the new CRM success and the traditional CRM success.

小腦 Purkinje細胞에 關한 組織學的 및 組織化學的 硏究

盧永福,梁南吉,文正錫,鄭柱炫 순천향의과대학 1979 Journal of Soonchunhyang Medical Science Vol.2 No.1

THe Purkinje cell is certainly one of the most spectacular nerve cells known. For many years all of Purkinje cell have been recongnized by the numerous authors. Yet unanimity on many doubtful points has not been reached, and our studies were carried out in an attempt to obtain the Knowledge of the neuro-anatomical research. We have studies on the Purkinje cellof various animal cerebellum by the his tological and histochemical method, and the results obtained are as follows; 1) The Purkinje cell bodies are arranged in a sheet on cell thick at the interface between the molecular and the granular layers in the vertebrates and birds. 2) The number of Purinje cells are local variations on the folium in each animals. 3) The size of the Purkinje cell in the cats are among the largest cellin the vertebrates. 4) All of the structural characteristics of the Purkinje cells can not found the variations between the vertebrates and birds.