冠岳樹木圓地域內 荒廢山地土壤의 肥沃化를 통한 綠化促進에 關한 硏究(II)

禹保命,權台鎬,李宗學,金景河,李峻雨,麻鎬燮 서울大學校 農科大學 1986 서울대농학연구지 Vol.11 No.2

The shallow soil depth and severe rock exposures on the hillslopes in the Kwanak aboretum area which resulted from the heavy soil erosion have made very poor growth of forest vegetation. In order to establish the forest vegetation in this area, it is urgent to recover the fertility of soil and the productivity of existing trees. For this reason, fertilization experiment (using the briquet compound fertilizer) was conducted on summer and autumn season in 1983 with the 4 main native species (Pinus densiflora, Pinus rigida, Juniperus rigida, Rhododendron schlippenbachii) growing on these eroded hillslopes. Result in 1985 and 1986 of this experiment represented that the fertilization was effective toward both height and root-collar diameter growth of trees and spring fertilization was, relatively, more effective than autumn fertilization. It also represented that effects of fertilization to P. rigida were more than those to other species. Therefore, besides the engineering methods and afforestation measures for soil erosion control, rapid establishment of vegetation through conservation and recovery of existing trees by fertilization is available measures for the rehabilitation of rockily eroded hillslopes like Mt. Kwanak area.

Association of Schizophrenia and Dopamine-hydroxylase (DBH) Polymorphismin β Korean Population

김학재,김정우,박윤형 순천향의학연구소 2010 Journal of Soonchunhyang Medical Science Vol.16 No.1

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冠岳樹木園地域內 荒廢山地土壤의 肥沃化를 통한 綠化促進에 關한 硏究

李宗學,麻鎬燮,權台鎬,李憲浩,禹保命 서울大學校農業生命科學大學附屬樹木園 1984 서울大學校 樹木園 硏究報告 Vol.- No.5

冠岳樹木園地域의 山腹斜面은 地質的으로 대보화강암에서 풍화생성된 거친 돌부수러기가 많은 粗砂質壤土로 구성되었으므로 表土層의 土壤流失이 심하여 土深이 대단히 얕거나 岩盤露出이 심하여 林木生長이 심히 不良한 地帶로서,山地의 地力恢復 및 現存하는 散生樹木의 生長力恢復을 通한 山地綠化保全이 시급히 요청되고 있다. 이와같은 요청에 부응하여 荒廢地斜面에 自生하고있는 주요한 4樹種(소나무, 리기다소나무, 노간주나무, 철쭉)에 대하여 山地施肥效果 試驗을 春期와 秋期로 나누어 실시한 결과 樹高 및 直徑生長量에 있어서 無施肥區에 比하여 현저한 施肥效果가 인정되었다. 따라서 冠岳山地帶의 荒廢地를 조속히 復舊綠化하기 위해서는 砂防土木的 工事方法 및 砂防造林的 播植方法이외에도 현존 수목의 保全 및 生長力恢復을 통한 速成綠化方法도 채용되어야 할 것이다. Hillsides in the Kwanak arboretum area were composed mainly of coarse sandy loam having relatively high proportion of rough weathered debris derived from the Daebo granite geologically. Owing to heavy soil erosion resulted to shallow soil depth and heavy rock exposures, the growing trees in this type of surface soil are very poor in their growth. For woody plant vegetation establishment in this montain area, it is urgent to recover the fertility of soil and the growth of existing trees. For this purpose, in spring and autumn season in 1983∼84 the fertilization experiment was conducted with the 4 principal native species(Pinus densiflora, Pinus rigida, Juniperus rigida, Rhododendron schlippenbachii) growing in this denuded forest land, and the effects of fertilized tree plots were more prominent than the control plot in both height and root-collar diameter growth. Therefore, the accelerating measures of vegetation rehabilitation through conservation of existing trees and recovery of tree growth by forest fertilization practices, besides forest engineering measur es and soil erosion control afforestation measures, could be acceptable as the measures for the recovery of denuded forest land in Mt. Kwanak area.

冠岳樹木園地域內 荒廢山地土壤의 肥沃化를 통한 綠化促進에 關한 硏究(Ⅱ)

李峻雨,李宗學,權台鎬,禹保命,麻鎬燮,金景河 서울大學校農業生命科學大學附屬樹木園 1986 서울大學校 樹木園 硏究報告 Vol.- No.7

The shallow soil depth and severe rock exposures on the hillslopes in the Kwanak aboretum area which resulted from the heavy soil erosion have made very poor growth of forest vegetation. In order to establish the forest vegetation in this area, it is urgent to recover the fertility of soil and the productivity of existing trees. For this reason, fertilization experiment (using the briquet compound fertilizer) was conducted on summer and autumn season in 1983 with the 4 main native species (Pinus densiflora, Pinus rigida, Juniperus rigida, Rhododendron schlippenbachii) growing on these eroded hillslopes. Result in 1985 and 1986 of this experiment represented that the fertilization was effective toward both height and root-collar diameter growth of trees and spring fertilization was, relatively, more effective than autumn fertilization. It also represented that effects of fertilization to P. rigida were more than those to other species. Therefore, besides the engineering methods and afforestation measures for soil erosion control, rapid establishment of vegetation through conservation and recovery of existing trees by fertilization is available measures for the rehabilitation of rockily eroded hillslopes like Mt. Kwanak area.

성인형 당뇨병 환자에서 피부생검을 이용한 표피하 모세혈관 기저막 두께의 변화에 관한 연구

김원학,오금탁,김만우,장경식,채종구,조건국 朝鮮大學校 附設 醫學硏究所 1987 The Medical Journal of Chosun University Vol.12 No.1

Thickening and proliferation of capillary basement membrane is a generalized phenomenon in diabetes mellitus and has been described in many organs including heart, kidney, pancreas, retina etc. While such changes are specific, it is difficult to obtain specimens from those organs. We took the specimens from the medial surface of the thing of 33 diabetics and 4 healthy persons as controls by means of punch biopsy. The measurement carried out by normogram and electron microscopic technique. HbA_(1c) values were also measured simultaneously. 1. The HbA_(1c) values are higher in diabetics than in control group (p<0.01). 2. The subepidermal capillary basement membrane thickness of the diabetics : 30% of the 5 th decade population, 53.9% of the 6 rh decade population and 83.3% of the 7th decade population showed more rhan 3,000 A. Whereas all the controls showed below 3,000 A. 3. The subepidermal capillary basement membrane thickness did nor increase significantly with the duration of the disease. 4. In cases of high subepidermal capillary basement membrane thickness, HbA_(1c) showed significant increase. (p<0.01).

임상교정 교육용 멀티미디어 데이터베이스 웹서버 구축에 관한 연구

박재우,이종기,장영일,남동석,김명기,양원식,김태우,백승학 대한치과교정학회 2000 대한치과교정학회지 Vol.30 No.2

본 연구는 인터넷상의 가상공간에 다양한 자료로 구성된 환자 증례를 통해, 교정을 배우고자 하는 임상의나 학생들의 교육에 필요한 멀티미디어 데이터베이스를 구축하기 위한 것이다. 이러한 시스템을 구현하기 위해서는 이미지 자료의 처리, computer network를 통한 빠른 정보처리 기능, 진단 분석법의 개발, 데이터베이스의 구축 기술, 데이터베이스와 인터넷과의 연계, 증례를 통한 교육방법론과 같은 기술적 문제점들이 있다. 진단과 치료계획을 위한 분석은 모델 분석과 두부방사선 사진분석으로 나누어 제공하였다. 모델분석법은 arch length discrepancy와 Bolton tooth ratio를 환자 정보란에 제공하였다. 두부방사선 사진분석은 초진란에 제공하였다. Cephalometric analysis ver 2.0과 Power Ceph pro 3.3.5를 이용하여 Tweed, Steiner, Jarabak분석법 등을 제공하였으나, 본문에서는 주로 Kim's analysis와 몇 가지 계측치를 추가하여 설명하였고, 나머지는 tracing란에서 제시하였다. 또한 치료 종료 후나 보정란에서 치료 전, 후의 두부방사선 사진을 중첩해서 보여줌으로써 치료에 의한 효과를 직접 볼 수 있도록 하였다. The Objective of this research was to construct the multimedia database system that was necessary for the education of the practitioners and the students. To establish this system, there were technical problems as follows : 1) The processing of the images, 2) The rapid processing of the information with the computer network, 3) The development of diagnosis tools, 4) The technique to establish the database system, 5) The link between the database system and the internet, and 6) The method to educate through many cases. The analysis for diagnosis and treatment planning were provided as two parts : model analysis and cephalometric analysis. As a model analysis, arch length discrepancy and Bolton tooth ratio were provided for the part of patient information. Cephalometric analyses were provided in the part of initial diagnosis. The Cephalometric analysis ver 2.0 and the PowerCeph pro 3.3.5 were used to show Tweed, Steiner and Jarabak analysis. In the main part, Kim's analysis and some measurements were added. In the post-treatment or retention part, we show the superimposition of the cephalometrics with which you can find the effectiveness of the various orthodontic treatment. The address of this home page is "http://damis.snu.ac.kr/orthodontics"

Cu 치환에 따른 Ni-Zn 페라이트의 전자파 흡수 특성

오영우,이선학,김종령,안용운,이승관 경남대학교 신소재연구소 2001 신소재연구 Vol.13 No.-

고상반응법을 이용하여 Ni_0.6-xCuZn_0.4Fe _2O_4(x=0, 0.1, 0.2, 0.3) ferrite 분말을 제조하고 1200℃에서 열처리하여 Cu 치환에 따른 입자변화와 전자파흡수 특성과의 관계를 조사하였다. Ni 자리에 Cu를 0.1mol 치환했을 때는 포화자화값은 큰 변화 없이 일정하였고 우수한 전자파습수능을 나타내었고, 그 이상 첨가 시는 포화자화값과 전자파흡수능은 직선적으로 감소하였다. Ni_0.6-xCuZn_0.4Fe _2O_4 ferrite powder was prepared by the solid-reaction method and sintered at 1200℃ and investigated grain size related with electromagnetic wave absorbing properties were investigated as a function of Cu substitution. The saturation magnetization and electromagnetic wave absorbing efficiency were rarely changed until substitution of Cu 0.1mol into Ni-site, but decreased strongly over 0.1mol Cu,

充塡 氣泡塔에서의 溫度變化에 따른 諸特性 硏究

李鍾學,鮮宇昌辰,金雨植 연세대학교 산업기술연구소 1977 논문집 Vol.7 No.1

The performance of packed bubble column was investigated in a 3 inches I.D. acryl column packed with spiral wires. The effect of temperature on a gas hold-up(??) was studied from 15℃ to 45℃ in air-distilled water system with superficial gas velocity variation, and the over-all height of transfer unit ((H.T.U.)??), volumetric liquid phase mass transfer coefficient (??) and over-all absorption efficiency (??) were studied from 25℃ to 55℃ in CO₂-air-distilled water system, holding other conditions constant. The resulte showed that the ?? had the maximum value at 35℃ in unvibrational air-distilled water system and 25℃ in vibrational acceleration system. And the value of ??, ?? and E? were increased with increasing temperature up to 45℃ and decreased with increasing temperature above this value in CO₂ absorption system. The effect of temperature on k?a and (H.T.U.)? was relatively high, and effect on ?? and ?? was slight.

α-디아조 케톤과 올레핀의 광반응

李學沂,曺燦湜,金宇鍾,禹海允 慶北大學校 1990 論文集 Vol.50 No.-

The majority of carbenes add to olefins to give cyclopropanes. In this study, 2-diazo-1,3-indandione, 2-diazo-1-indanone, and 3-diazooxindole were used as carbene precursors. Irradiation of these diazo compounds with trichloroethylene, acrylonitrile, cyclohexene, and cyclooctene was investigated. The addition of carbenes to benzene generally affords norcaradiene or cycloheptatriene or both. Irradiation of 2-diazo-1,3-indandione with benzene gave only cycloheptatriene derivative in 24% yield. But irradiation of 2-diazo-1-indanone with benzene gave norcardiene in equiribrium with cycloheptatriene derivative in 24% yield.

정상인과 혈액질환 환자에서의 혈소판 평균용적치에 관한 연구

김학현,구선회,박종우 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.1

Molphologic study of platelet have been done by many authors for the past years, they investigated that the heterogeneity of platelet size was shown even in normal person and various hematologic disorder. In the past the platelet size was not utilized in clinical medicine because of its technical difficulties of measuring. Recently, and automated blood cell counter, Coulter counter Model Splus Ⅱ®, was introduced and platelet size could be easily gained, which expressed by mean platelet volume(MPV). Therefore, this study was planned to evaluated the clinical significance of MPV in health person and various hematologic disease. The following results were obtained: 1. In healthy person, MPV was decreased along with increasing the platelet number. 2. In thrombocytopenic patients, MPV was decreased more than normal. 3. In various hematologic disease, MPV was decreased in acute leukemia, marrow failure and aplastic anemia, normal in iron deficiency. anemia, increased in reactive marrow, MPV was varied by platelet number in various hematologic disease. This disclosed that MPV was related with marrow function and production of megakaryocytes. From these results, MPV could be used as a valuable parameter in the evaluation of platelet together with measuring the platelet number. Particular relation-ship between MPV and various hematologic disease were not observed. We should be more study for MPV.