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온주밀감(Citrus unshiu Marc. var. Okitsu)과 오렌지(Citrus sinensis (L.) Osbeck)의 원형질세 융합
홍경애,송성준,이옥영 제주대학교 방사능이용연구소 2000 연구보고 Vol.14 No.-
By the development of plant molecular biology these days which has been accomplishing much an attempt to get mutants. However, there have been haying many issues in lacking of recognition for transformants and the right of ownership of the gene. The breeding method of cell fusion without any problems can easily make new variety with an excellent character having plant itself. The purpose of this study was therefore to carry out to get trantsformants having sweeter taste and the original character of Citrus unshiu itself using PEG method of cell fusion. The yield of protoplasts per gram of leaf was 7 × 105 ~ 1 × 106/㎖ and callus cell was 1 × 106 / ㎖ . The first protoplast division and formation of micro-calli were observed 7 to 9 days and 30 to 40 days after incubation, respectively. To induce embryo from these calllus were inoculated solid medium containing 1.6% agarose and 5% sucrose. Green somatic embryo and plantlet were appeared from 1 to 2 months after plating and transfered to MT basal medium to stimulate rooting and shoot elongation. It was difficult to get normal plant directly through embryo of globular, heart and terpenoid state, and more effective method was directly to get plantlet from the globular embryo without heart and terpenoid state to control properly agar concentration.
Ethylenediaminetetraacetic acid(EDTA)항응고제에 의한 Mean Corpuscular Volume(MCV)변화
홍승민,박영진,최하영,임진,정옥연,이호준,이호영,장숙진,문대수 朝鮮大學校 附設 醫學硏究所 1996 The Medical Journal of Chosun University Vol.21 No.2
It is essential that we put the anticoagulant into the blood specimen of the CBC test. However, the value of some parameters in the CBC test can be changed whenever using some anticoagulants. EDTA anticoagulant is mostly used these days. There are 3 kinds of EDTA, that is K_(2-), K_(3-), and Na_(2-) EDTA. The author studies how many effects each the EDTA gets into the true value of blood specimen for MCV of RBCs. Especially we compared the MCV effect of different concentrations of 3 EDTA anticoagulants on the bias with time and instrument. Some results are gotten. In our results, K_(3-)EDTA anticoagulant shows more satisfactory MCV value than K_(2) or Na_(2-)EDTA. On using concentration of EDTA, 1.5㎎ EDTA/㎖ of blood show more satisfactory MCV value than 7.5㎎ EDTA/㎖ of blood. However, the choice of anticoagulant may be dependant on the different instruments.
蓄熱用 TMA 包接化合物의 熱物性에 關한 實驗硏究(II)
홍경한,한영옥,하옥남,김진흥 조선대학교 에너지.자원신기술연구소 1997 에너지·자원신기술연구소 논문지 Vol.19 No.2
This paper presents the test-tube experimental results of thermal properties of TMA clathrate compounds for latent heat storage applications. The results are ; TMA 25wt% clathrate compounds among the clathrate for various concentration, was found to have the most superior thermal property and when the heat source was -5℃, regarding the COP of refrigerator, 1) Phase change temperature was 5.3%. 2) Subcooling was 6.3℃. The subcooling of TMA clathrate decreased according to the temperature of decreasing heat source 3) Specific heat was 4.5kJ/kgK. 4) The latent heat of TMA 25wt% clathrate was the maximum 252.8kJ/kg. As subcooling can be lowered to 0.3℃, when the heat source is -15℃, continual study is needed to reduce the subcooling.
홍성표,박영옥,송기범,배일호,이준 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.2
The use of digital imaging technique and digital contents based on internet has grown rapidly for last several years, and the needs of digital image protection become more important. For the purpose of copyright protection on digital image, the verification of authentication techniques like content authentication, ownership authentication, illegal copy and etc are needed. Digital watermarking, the invisible encryption technique to insert digital watermark into image, the sophisticated perceptual information should be used for providing transparency and robustness of images on watermarking process. In this paper, we implement the algorithm for preventing forged attack, ownership protection and authentication by transforming the wavelet algorithms in frequency domain in terms of human visual system.
최윤영,정광옥,지홍기 영남대학교 지역발전연구소 1997 새마을지역개발연구 Vol.20 No.-
This study is aimed at the development of management of surface water in the urban environment. In the civilization process of riverside, natural and humane environment has changed continually, and there are more frequent changes in flux and quantity of surface flow in civilized riverside than in natural riverside. Civilization concerned with the concentration of population and activity and expanding the range of urban area changed natural environment, and humane activity in urban area caused appearance of new hydrologic cycle system. This study defined the concept of urban environment and the role of river and investigated the change of natural environment caused by the civilization of urban area, the change of recharge from surface flow fluxing characteristics in urban river, and flux for suggesting the organization system of surface flow in urban river. To make the device which reasonably organize the surface water flow insurance in urban environment, this study systematically suggests the surface water flow management on flood-control, water-use and environmental aspect. To make the device which synthetically manage the surface water flow in urban river, this study suggests urban river synthetically management model which aims for harmony with nature which contains the concept of amenity, connecting with space, devotion to local for river development and preservation.
20~30대 젊은 여성의 골밀도, 신체조성과 식행동 연구
구재옥,안홍석,유숙영 대한지역사회영양학회 2008 대한지역사회영양학회지 Vol.13 No.4
This study was carried out to identify bone mineral density (BMD), body composition, lifestyle and dietary habits of young women by physical measurement and questionnaires. The study subjects, 190 young women living in Seoul, were divided into three age groups: 20 ~ 24 years (93), 25 ~ 29 years (44) and 30 ~ 39 years (53). There was no significant difference in mean body muscle mass, protein, mineral, body fat and BMI among the three age groups. The rate of low weight (18%) in 20 years group was higher that of the 30 years (11.3%). The mean BMD and T-score were 0.44 g/㎠ and -0.66. BMD and T-score of the forearm bone were significantly higher in the 30 ~ 39 years group. But BMD and T-score of calcanues were not significantly different among the three age groups. The rate of normal, osteopenia and osteoporosis subjects by BMD were 60.5%, 38.4%, 1.1%, respectively. The rate of osteopenia in 20 ~ 24 years group was significantly higher than the other age groups. The rate of meal irregularity was significantly higher in 20 ~ 24 years group. The rate of women who walk and are exposed to sunlight more than 1hr per day were significantly higher in 20~24 years group than the others. However, the score of food behaviors is significantly higher (bad) in 20 ~ 24 years group than the others. The relationship between BMD and frequency of food intake showed significant differences in beans, broom, seaweed and rice wine. In conclusion, the risk rate of BMD was very high, 40% of the subjects, and the risk rate of BMD was higher in 20 years group than 30 years group, and the rate of low weight in 20 years group was higher than in 30 years group. The food habits and behaviors were not healthy enough. Therefore, nutrition education is needed for bone health.