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      • KCI등재후보
      • 폐결핵 환자의 우울 상태

        홍정표,최선희,조만종,이성주,박종,김기순,김양옥 朝鮮大學校 附設 醫學硏究所 1997 The Medical Journal of Chosun University Vol.22 No.1

        The main purpose of this study is to identify and evaluate the depressive states for the patients with chronic pulmonary tuberculosis. A questionnaire(Self-rating Depression Scale, SDS) survey was performed toward 57 pulmonary tuberculosis patients with initial treatment who started chemotherapy and 53 pulmonary tuberculosis patients with retreatment, admitted to one tuberculosis-centered hospital and two general hospital. Fifty three healthy persons as control group were investigated with the same questionnaire for comparison. The survey was performed from July to August 1996. The results are as follws : 1. The patients had significantly high scores in the depression than control and the patient with retreatment showed significantly high scores in the depression than the patient with initia1treatment(P<0.01). 2. The depressive levels of the patients were associated with duration of admission and the expectancy of recovery (P<0.05). 3. The percentage of the subjects with 40 or more scores tentatively classifiable as psychologically depressed was 67.1% of the total subjects, 48.4% of the control groups, 75.0% of the patient with initial treatment and 84.1% of the patient with retreatment. Because patient with pulmonary tuberculosis with initial treatment showed higher depression scores than normal persons, and patients with retreatment due to failure of initial treatment showed higher depression scores than initial treatment, it is necessary to give attention to depression of the patients during treatment of pulmonary tuberculosis.

      • 산소 혼합비에 따른 Ba_(0.7)Sr_(0.3)TiO₃박막의 유전체 특성

        홍석민,임성민,김호건,김옥경 한양대학교 이학기술연구소 1999 이학기술연구지 Vol.1 No.-

        Ba과 Sr의 화학당량비를 조절하여 Ba_(0.7)Sr_(0.3)TiO₃분말 시료를 제조하여 각각 1,200℃와 1,300℃에서 calcining과 sintering을 실시한 후 3 inch 성형틀로 Ba_(0.7)Sr_(0.3)TiO₃인 sputtering target를 제작하였다. MIM구조의 capacitor를 위하여 하부전극을 Pt(1500Å)/TiN(2000Å)/SiO₂/Si로 하고, 제작한 target를 이용하여 RF sputtering방법으로 BST박막을 증착하였다. 제작한 박막의 결정구조를 X-선 회절계(XRD)로 분석한 후 Al을 상부전극으로 증착하여 축전기구조로 C-V와 I-V의 전기적 특성을 얻었다. 제작된 박막의 결정구조를 XRD 측정으로 확인한 결과 550℃ 이상의 기판온도에서 결정성장이 양호함을 보였다. 유전상수와 유전손실이 기판온도와 sputtering 가스의 산소 혼합비에 영향을 받는 것으로 확인되고 I-V를 통한 전기적 특성에서 전도기구가 Schottky 장벽에 의한 것과 높은 인가전압에서 space charge limited (SCL) 전도 특성을 보였고, 누설전류의 값은 표면구조의 영향으로 산소가스의 증가에 따라 감소하였다. Ba_(0.7)Sr_(0.3)TiO₃powders were prepared by changing stoichiometry of Pb and Ba. After they were calcined and sintered at 1200℃ and 1300℃ respectively, BST sputtering targets were made in 3 inch mould. For MIM structure capacitors, Pt(1500Å)/TiN(2000Å)/SiO₂/Si were used for bottom electrodes and the BST thin films were sputtered on bottom electrodes. After we analysed their structures by XRD, Al was evaporated on the BST films for MIM capacitor and we investiaged the electrical properties by measuring of C-V and I-V. We found that the structures of the films showed good crystalllinity above 550℃ from the results of XRD measurements. We supposed that the dielectric constant and dielectric loss of films were affected with substrate temperature and oxygen ratio of sputtering gas. In I-V behavior, we supposed that the conduction mechanism was Schottky conduction and space charge limited(SCL) conduction in high voltage range.

      • 邊山地方의 赤松集團에 關한 硏究

        洪性玉,高大植 전북대학교 농업과학기술연구소 1978 農大論文集 Vol.9 No.-

        It was recently observed by the authors that a natural population of Korean red pine (Pinus densiflora S.et Z.)distributed in Byunsan area has a straight stem-form and rapid growth rate compared with the interior red pine trees which used to show crooked stems and slow growth. In spite of these good characters of the Byunsan pine trees, they have not been included so far in the red pine breeding work through selection of superior trees in our country, probably because the trees of that area were too young to attract tree breeders eyes when the breeding work started. As A basic study to use the Byunsan population of red pine for the improvement of the species, the present study investigated the population by means of anatomical characteristics of needles, i.e., the location of resin ducts, hypoderm layers, and other characters in the cross section of needles, to see if the Byunsan pine is composed of pure red pines or it is contaminated with black pines(Pinus thunbergii Parl.) resulting in a kind of introgressive hybrids of the two species as observed frequently in the overlapped area of them. Internodal growth of the Byunsan pine trees was measured together with female and green cone counts from them. Needles taken from the Byunsan red pine trees mostly showed the typical characteristics of red pine in the cross section except the needles from the stand near a black pine plantation or near the western coast. The former revealed external in the location of resin ducts and the latter both external and medial. In view of the anatomical characteristics of needles, it is considered that the Byunsan population of red pine is not composed of the introgressive hybrids but mostly of pure red pine. Mean hybrid percent and RDI were 5% and 0.11. respectively. Mean height growth was comparable to that of an eastern red pine stand with site index 12. Therefore, it is concluded that selection of superior trees or plus trees in the Byunsan red pine population would be worthwhile for the tree improvement work of the species in terms of their rapid growth and the stem straightness. Thus, the Byunsan population is recommended to include in the red pine breeding work for the future. Further study is needed to find if the straight stem-form and the rapid growth of the Byunsan red pine trees are to be retained when their progenies are planted in the inland area.

      • Pinus densiflora와 Larix leptolepis의 新梢內 遊離 Arginine의 時期的 變化

        洪性玉,金在憲,朴在仁 전북대학교 농업과학기술연구소 1979 農大論文集 Vol.10 No.-

        As a basic study to promote flower formation in the seed orchard the present paper reportsthe seasonal variation of free arginine contents ill relation to flowcr initiation in new shootsof fr'ufr frrri∫forH and turf'』 frffefrfi'』 clones growing in their clone bank. The results aresu]nmarized as follows :1. Arginine contents of new shoots in both showed a p:Bt in thf early and mid June Irhen theshoots ceased their elonfation and another peak in thf mid and late Julf when the flowerinitiation occurred.2 . Arginine ]evel was very low or the lo'uest durinf th2 late AuTust and the early SeptemberItFhen the flower initiation was finished.3. Stored arginille content during the winter months was low in firur frrrf'#fore but very highin frrf'』 frffofrff'f. The level of arginine gradually increased in the former species whereasit decreased in the latter as tile growing season praTressed.4. Both species showed clonal differences in arginine coltents, hi,vEvfr, sulh clonal diffe-rences did not coincide with the clonal differencfs in tllfir florerinT ability.

      • KCI등재
      • 과학과 수업 방법의 요인분석 연구

        우종옥,정진우,홍성일 한국교원대학교 과학교육연구소 1995 청람과학교육연구논총 Vol.5 No.1

        The purpose of this study was to find out and analyze the science teacher's teaching methods. A total of 35 teaching methods were abstracted from the previous studies and the relating literatures. An instrument to measure the frequencies of using methods was developed and then tested to middle school science teachers. The Results of two factor analysis methods were compared. The results are as follows: The instruments's reliablity coefficient(Cronbach α) was 0.7707. The teaching methods which middle school science teachers have used frequently were represented as the proposing of the learning objectives, the deductive teaching, the experimental activities by teacher's guide, the summarization after explanation, the reading text etc. Also, it was revealed that they have not use the diagnostic evaluation, the formative evaluation, the experimental activities by student's design, the instructional medium. By confirmatory factor analysis, the 1st factor included 13 teaching methods and 2nd and 3rd factor included 9 and 7 methods respectedly. The meaning of 1st factor was interpreted to stimulate student's learning motives. And the other's were about the development of instruction. In exploratory factor analysis factors were overlapped or more fined.These were due to the structure of factors.

      • 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.

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