Plant regeneration from callus of Iris odaesanensis Y. N. Lee native to Korea via organogenesis

Bae, Kee-Hwa,Yoo, Kyoung-Hwa,Lee, Mi-Hyun,Jeong, Jae-Hun,Choi, Yong-Eui,Yoon, Eui-Soo The Korean Society of Plant Biotechnology 2013 식물생명공학회지 Vol.40 No.3

Iris odaesanensis Y. N. Lee. is an important endangered and native plant belonging to the family Iridaceae in Korea. This study describes a method for rapid micropropagation of this species via from leaf, rhizome and root explants derived calli. Leaf, rhizome and root explants were cultured on Murashige and Skoog (MS) medium supplemented with 2,4-dichlorophenoxy acetic acid (2,4-D) for callus induction. Rhizome explants yielded calli at a frequency of 72% when cultured at 1.0 mg/l 2,4-D. Calli were maintained at 1.0 mg/l 2,4-D. These calli were transferred to MS medium supplemented with 0, 0.5, 1.0, and 2.0 mg/l 2,4-D in combination with 0, 0.5, 1.0, and 3.0 mg/l BA for adventitious shoot induction. The highest number of adventitious shoot (228.9 per petri-dish) were formed at 1.0 mg/l 2,4-D and 1.0 mg/l BA. WPM medium was the best to convert calli into plantlets, where up to 98.2% of calli were regenerated into plantlets. This in vitro propagation protocol should be useful for conservation of this endangered plant.

Electron Cyclotron Resonance O_2 Plasma에서 증착한 규소 산화 박막의 특성

안명환,서문석,장재선,서성모,이기방,윤창주,이형재,남기석,최규현,손춘배,김용섭,강석희 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.17 No.-

규소 산화막을 ECR-CVD(electron cyclotron resonance-chemical vapor deposition) 증착방법으로 5인치 기판위에 상온에서 증착하고, 증착공정조건인 증착율, 기판온도, 마이크로파의 세기변화 및 플라즈마 혼합기체의 비에 따른 규소 산화막의 특성을 조사하였다. 또한 산화막의 구조적인 특성을 비교하기 위해 FTIR을 이용하여 ECR-CVD 증착한 산화막, RPE-CVD(remote plasma enhanced-CVD) 증착한 산화막 및 열 산화막의 stretching frequency를 측정하였다. 측정된 결과 ECR-CVD로 증착된 산화막이 구조적인 면에서 열 산화막과 거의 같음을 보였다. ECR-CVD로 증착된 산화막의 전기적인 특성을 전류-전압 및 축전-전압 측정에의하여 분석하였다. 축전된 산화막의 전기적인 특성은 산화막의 전하 밀도는 1×10 exp (11)/㎠이였고, 평균 절연 파괴 전압은 약 6 MV/㎝이다. We have grown thin films of SiO_2 at room temperature by using an ECR-CVD system and have investigated the changes in the properties of the deposited films with changes in the processing conditions such as the deposition rate, the substrate temperature, the microwave power and the plasma gas mixing ratio. We also measured the stretching frequency of three kinds of oxides, and ECR-CVD-grown oxide, a PECVD-grown oxide, and a thermally grown oxide, using FTIR analysis to compare their structural properties. The result shows that the structural properties of the ECR-grown oxide are similar to those of the thermally grown oxide. Additionally, the electrical properties of the ECR-grown oxide were investigated by using current-voltage and capacitance-voltage measurements. These electrical results indicate that the oxide charge density and the average breakdown voltage are 1×10 exp (11) ㎝^-2 and 6 MV/㎝, respectively.

복합 관동맥병변에서의 Rotational Atherectomy : 초기결과

김진우,박성욱,홍명기,이상곤,이일수,이철환,최기준,강덕현,송재관,김재중,박승정 대한순환기학회 1997 Korean Circulation Journal Vol.27 No.9

한국 정신장애의 역학 조사 연구[I] : 각 정신장애의 유병률

조맹제,함봉진,김장규,박강규,정은기,서동우,김선욱,조성진,이준영,홍진표,최용성,박종익,이동우,이기철,배재남,신정호,정인원,박종한,배안,이충경 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4

Objectives : This study aims to estimate the prevalence of the DSM-IV psychiatric disorders in Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI). Methods : Subjects were selected by taking multi-stage, cluster samples of 7,867 adult household residents, 18 to 64 years of age, in ten catchment areas. Total 78 trained interviewers administered the K-CIDI to the selected respondents, from June 1 to November30,2001. Results : Total 6,275 respondents completed the interview. Some 33.5% of respondents reported at least one lifetime disorder, 20.6% reported at least one-year disorder, and 16.7% reported at least one-month disorder. The most common lifetime disorders were alcohol abuse/dependence (17.24%), nicotine dependence/withdrawal (11.19%), specific phobia (5.16%), and major de-pressive disorder (4.25%). The lifetime prevalence of substance abuse/dependence (0.25%) and schizophrenia (0.16%) was very low. Nicotine and alcohol use disorder showed very high male/female ratio. Mood disorder and anxiety disorder were more prevalent among female than male. Conclusion : The prevalence of psychiatric disorders was high. In comparison with other studies, remarkable differences in distributions of psychiatric disorders across the areas and times were observed.

Al-Fe-Ni 공정복합합금의 응고속도에 따른 전기저항의 변화

이재갑,조현기 경북대학교 산업기술연구소 1988 産業技術硏究誌 Vol.17 No.-

Numerous researchs have been investigated concerning the mechanism of unidirectionally solidification and the relationships between microstructure and growth rate in eutectic alloys. Although it is expected that the anisotropic microstructure associated with eutectic should produced the interesting electrical properties, almost all studies on eutectic composite alloy have been investigated about morphology, mechanical properties and thermal stability. In the present study, changes of electrical resistivity according to cooling rate in Al-Fe-Ni eutectic composite alloy is investigated. The obtained results are as follows; As cooling rate(R) increased, electrical resistivity of Al-Fe-Ni eutectic composite alloy at 520℃ increased with increaseing of fineness of eutectic fibers and formation of cellular structure. The higher the cooling rate, the higher the temperature dependence of electrical resistivity and the lower the stability of eutectic composite alloy, respectively.

몇가지 작물중 침투성 살충제 Carbofuran의 잔류량 분석

이재구,최신종,경기성,안기창,권정욱 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-

In order to ascertain the safety of the systemic insecticide carbofuran - treated crops. garlic, peanut and potato were collected randomly from markets near the major producing farms and analyzed for the residues of carbofuran and its main metabolite, 3-hydroxycarbofuran. The in vitro metabolism of carbofuran in phosphate buffer extracts of the crops was investigated. The results obtained were as follows. 1.The recoveries of carbofuran and 3- hydroxycarbofuran from the spiked samples were 92~ 100% in all samples. The detection limit and minimum amount of carbofuran detected were 0.02ppm and 0.1ng, and those of 3-hydroxycarbofuran 0.06ppm and 0.3ng, respectively. 2.Two mature garlic samples out of 20 contained 0.13 and 0.07ppm of carbofuran, respectively, showing a detection frequancy of 10%. The residue level was less than the maximum residue limit(0.5ppm) set by the health authorities in Korea. Only one mature garlic sample out of 20 contained 0.13ppm of 3-hydroxycarbofuran. 3.The residues of carbofuran and 3-hydroxycarbofuran in the immature garlic, peanut and potato samples were less than the detection limits. 4.The application of carbofuran to the fields of garlic, peanut and potato would be safe, considering that the estimated maximum acceptable daily intake of carbofuran from garlic was 0.0007mg which is 0.13% of the maximum acceptable daily intake(0.55mg) . 5.Carbofuran was hydrolyzed in vitro mainly to carbofuran phenol(m/z 164) in phosphate buffer extracts of the three crops in contrast to the major oxidative metabolism in situ. The amount of the metabolite increased with the incubation time.

釜山大學校 학생 써클활동 實態와 그 運營改善方案에 관한 調査硏究

李衡基,李成海,李大雨,鄭榮洪,林再澤 부산대학교 학생생활연구소 1983 硏究報 Vol.19 No.1

The present study deals with student circle activities at Pusan National University in an effort to improve student circle guidance. University circles are regarded as influencing an individual's self-growth. Two sources of data were used for this research. A total of 764 students at Pusan National University who were randomly sampled out of the registered students in 1982 Spring semester were the main subjects. Another source for the study were from 70 student circle leaders whose responses to another questionaire in a special leader training session held on October of 1982. Student respondents for this study were analyzed in three groups;(1) students who participate in circle activities at the time of the research, (2) students who participated in a circle in the past but not active at the time of the questionaire interview, (2) students who have never been members of a circle. The student respondents who were or have been members of the circles in which they participate:social service circles;academic circles; circles for special hobbies; religious circles; athletic circles for special hobbies; anti-communism circles. Some of the important findings from this research are summarized in the following. (1) Pusan National University students enjoy more student circle activities as demonstrated in the sheer number of student circle activities registered in the Student Affairs Section of the University. Circles with friendship purpose seem to decline, while circles for special hobbies and academic purposes tend to increase. (2) Many students were found to drop out of the circle activity mainly due to the lack of the circle activity information before their participation in those circle. More coeds than male students show this tendency. (3) Student circle members with specific purpose and goal in mind before participating in those circle regard aircle activity as contributing to the self-growth. (4) Many respondents think that circle activities are vital and necessary in the campus life. However, they do not find proper circle to paticipate. (5) The role of the student circle guidance professors was found to be important. (6) Problems for funding the student circles and finding meeting places for the circle activity remain to be solved. In short, the present study underlines the importance of the activization student activities which can be achieved through intensive circle guidance by circle advice professor and proper funding.

대장에 발생한 샘암종에서 MUC1과 MUC2 점소 발현의 의의

이윤경,이주호,이용,심재영,박정훈,오수섭,박진실,기근홍 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.2

Background : Mucins possess the unique function of protecting and lubricating the epithelial surface and other important functions such as call growth, direct implication in the fetal development, the epithelial renewal and differentiation, the epithelial integrity, carcinogenesis, immune regulation, cellular adhesion and metastasis. Purpose : This study was done to provide the significance of alteration of MUC1 and MUC2 expression in colorectal adenocarcinoma, A series of 131 colorectal adenocarcinomas including 11 mucinous carcinomas were screened immunohistochemically for their expression of MUCI and MUC2, Materials and mehtods : Of 131 carcinomas, 76 (58,5%) were MUCI positive and 91 (68, 9%) were MUC2 positive, In normal colonic goblet cells, MUCl was not expressed but MUC2 was expressed in cytoplasm, Conclusion There were up-regulation of MUCI and down-regulation of MUC2 in colorectal carcinomas, The frequency of MUC2 positivity according to differentiation was statistically reliable. (p=0.0001)

무선 ATM에서 QoS를 유지하기 위한 TDMA 기반의 슬롯분배 방법 MAC 알고리즘

이기현,최재구 明知大學校 産業技術硏究所 2000 産業技術硏究所論文集 Vol.19 No.-

Next generation wireless network will be developed as mobile communication which will support ATM-based multimedia traffic. It is desirable to exploit an effective MAC(Medium Access Control) Protocol in order to support multimedia traffic with variety of QoS characteristics on wireless networks. In this dissertation, current multimedia applications are classified by rt-CBR(real-time Constant Bit Rate), voice, rt-VBR(real-time Variable Bit Rate), and nrt(non-real time) services according to real-time or non real time and constant or variant characteristics in the proposed TDMA based MAC Protocol. The proposed TDMA based MAC protocol guarantees the balanced QoS among real time multimedia services with diverse and different traffic characteristics and manages program effectively since the services with same traffic characteristics have their own slot allocation algorithms.

영상매개체를 이용한 공간위치의 수치모델화에 관한 연구

이재기, 정재섭, 이현직 忠北大學校 1986 論文集 Vol.32 No.-

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