作形에 따른 土壤 微小節肢動物의 分布에 關한 硏究

崔星植,郭晙洙 圓光大學校 1984 論文集 Vol.18 No.2

土壤中에는 여러 가지 動物群이 棲息하고 있으며 특히 土壤 微小節肢動物은 그 數나 種이 매우 多樣하고 腐植을 포함한 有機物을 分解하여 土壤의 理化學的 性質을 變化시키므로 種生과 動物相에 影響을 미쳐 土壤生態界의 均衡을 維持하는데 중요한 役割을 하고 있다. 이들은 自然的, 人爲的 諸要因에 의해서 영향을 받으며 특히 腐植을 포함한 土壤表層의 狀態와 가장 關係가 큰 것으로 알려져 있다. 따라서 耕作形態와 植生을 달리하는 地域에서 土壤에 棲息하는 微小節肢動物의 分布狀態를 調査하기 위하여 森林 및 竹林 等의 非耕作地와 果樹園, 桑田 및 牧草地, 人蔘圃 및 園藝團地 等의 非永年作物 栽培地를 대상으로 本 硏究를 實施하여 다음과 같은 結果를 얻었다. 1. 調査期間中 採集된 土壤動物은 總 8, 083個體로서 Acarina가 57.2%, Collembola가 29.3%였다. 2. Acarina의 群集造成은 Cryptostigmatark 74.4%로 가장 많고, Mesostigmata, Prostigmata의 順이었다. 3. Cryptostigmata의 分布를 보면 森林에서 45種(827個體), 竹林42(637), 果樹園34(606), 牧草地 20)(516), 田作地 27(395), 人蔘圃 13(225), 園藝團地 18(148), 桑田 11(88) 等으로 個體數/種數 比率의 非耕作地에 비해 耕作地에서 높은 것으로 나타났다. 4. Cryptostigmata 중 Epilohmannia pallida pacifica A., Tectocepheus velatus M., Scheloribates laevigatus K., S. latipes K., Protoribates lophotricus B., Protoribates monodactylus H. 等의 6種은 全 調査區에서 採集되어 廣範圍한 分布를 보였다. 5. 垂直的分布는 63.8%가 地表下 0-5cm 層에 分布되어 있었으며 5~10cm 層에 26.7%, 10~15cm層에는 9.5%이었다. 6. 土壤 微小節肢動物의 個體數는 有機物과의 사이에서만 垂直的 季節的 分布에 있어서 5% 內에서의 有意性이 認定되었다. This study was carried out to investigate how cultivation affects both the variety of species and the density of soil micro-arthropods. To fulfil this purpose, smples were taken from uncultivated areas such as a forest and a bamboo forest as well as diversely cultivated areas such as a orchard, a pasture, a cultivated upland, a giseng field, a horticultural field, and a mulberry field in Jeonbug Province, South Korea from May, 1981 to February, 1982. The outcome of the study was as follows : 1. Among 8,083 individual number of microarthropods collected, 57.2% were Acarina and 29.3% were Collembola. 2. Acarina consisted of Cryptostigmata (74.4%), Mesostigmata, and Prostigmata. 3. The distribution of cryptostigmata was as follows : Forest-45 species/827 individuals ; Bamboo forest-42sp. /637 indv.; Orchard-34 sp./ 606 indv. ; Pasture-20 sp./516 indv.; Cultivated upland-27 sp./395 indv.; Ginseng field-18sp./148indv.; Mulberry field-11 sp./88indv. The individual numbers/species numbers ratio of Cryptostigmata was higher in cultivated lands. There was more species variety with a small number of individuals in uncultivated lands, but less species variety with a larger number of individuals in cultivated lands. 4. 6-species of Cryptostigmata were found in all study area : Epilohmannia pallida pacifica A., Tectocepheus velatus M., Scheloribates laevigatus K., S. latipes K., Protoribates lophotricus B., Protoribates monodactylus H. 5. The vertical distribution of soil micro-arthropods was as follows : 0-5cm subsoil-approximately 63.8%, 5-10cm subsoil-approximately 26.7%, 10-15cm subsoil-approximately 9.5%. 6. Seasonal density fluctuation of soil micro-arthropods was low in spring, highest in fall, and decrease to winter. 7. In both seasonal density fluctuation and vertical distribution, a positive correlation and difference were observed between organic materials and total individual numbers of micro-arthropods. This was also true in the case of Cryptostigmata.

분만시 발생한 쇄골골절

최경수,정의섭,지성구,이종봉 예수병원 1997 예수병원학술지 Vol.18 No.-

협심증 환자에서 경피적 관동맥 확장술 후의 QT간격분산(QT Dispersion)의 변화

최일준,이일수,이상곤,홍명기,박성욱,박승정,김유호 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.9

HPLC를 사용한 쌀 중 잔류농약 동시분석법

최재천,이영자,김소희,최수영,최희주,정성욱,박흥재,김우성 한국환경과학회 2005 한국환경과학회지 Vol.14 No.4

A simple and sensitive analytical method based on RP-HPLC with UV detector(225 nm) and mobile phases using 0.1% phosphoric acid and acetonitrile was developed for simultaneous determination of quinclorac, bentazone, 2,4-D, bensulfuron-methyl, dymuron, capropamide, pencycuron, ethofenprox. This method was resulted in recovery of 78~ 96% with RSD 3.3~7.5%. LODs 0.12~0.84 and LOQs 0.34~1.20 ㎎/L. Calibration curves were linear with r of 0.9995~ 0.9999.

物價의 巨視經濟變數에 대한 動態的 波及效果分析

崔成哲,周修鉉 釜山 外國語 大學校 1995 外大論叢 Vol.13 No.1

The Purpose of this study is to empirically analyze time series model for the dynamic effect of prices on macroeconomic variables. For this purpose, Vector Error Correction Model composed of seven variables is estimated as a prices forecast model. Maximum likelihood estimation is applicated to estimate VECM following Johansen(1988). The forecast experiments is based on the model for sample periods that begin in the first quarter 1970 and end fourth quarter 1992. In general, the analysis attempts to address the general conclusion that has emerged from the study of such VAR that most of dynamic interactions among the key variables can best be explained as. The VAR system is an atheoretic model that captures the statistical relations among various macroeconomic time series. We have tried stationarity of variables with unit root test and cointegration test. Both of the likelihood ratio-the trace test and the maximum eigenvalue test-fail to reject the hypothesis that three or fewer cointegrating at the 5 percent level exist. Thus, three cointegrating vectors were found in the system that include seven variables, and hence this system was estimated as a VECM(vector error correctiion model) As a result of VECM, the dynamic effect of macroeconomic variables of demand side on prices is larger than that of macroeconomic variables of supply side. Though we could not find that wage, interest rate, export and import affect prices from Granger-causality test, we have found prices does Granger-caused by consumption, investment. We could find the following facts by means of variance decomposition at the twenty-four quarter horizon. Results show that innovations in consumption, investment account for more than the other variables share of the variance of prices under orderings presented. The results above means that demand factors is not only the major determinant of prices but also the important variable which influences the price directly. Furthermore it can be implied that prices is determined not by supply factors but by demand factors.

셀룰로오스에 브롬화비닐의 그라프트 반응과 그 방염성에 관한 연구

최금숙,조성무,채희주,유학수 연세대학교 자연과학연구소 1987 學術論文集 Vol.18 No.-

셀룰로오스에 방염성을 부여하기 위해 산화-환원 개시제인 Ce^??이온을 이용하여 브롬화비닐을 그라프시켰다. 일반적으로 그라프트율은 시간에 따라 증가하다가 정상 상태에 도달하고,단량체 농도에 비례하며 극대치를 갖는 개시제의 농도가 존재한다. 그라프트율의 증가에 따라 한계산소지수가 높아져 방염성을 보임을 알 수 있다. To impose the flame retardant properties on cellulose, vinyl bromide was grafted on cellulose by redox initiator Ce^??. Generally, graft yield increases according to graft reaction time but as time goes on it shows steady state, however, it keeps on increasing in proportion to monomer concentration and has an optimum initiator concentration. It was found that LOI was proportional to graft yield and grafted cellulose had flame retardant properties.

韓國 信用割富의 巨視經濟效果에 대한 計量分析

최성철,주수현 釜山 外國語 大學校 1997 外大論叢 Vol.16 No.1

The interest rate is the adjustment mechanism in loan markets. An equilibrium has seldom acquired in loan markets because of characteristics of loan markets such as default risk, borrower classification, customer relationships, and imperfect imformation. Credit rationing can be defined as a situation in which there exists an excess demand for loans because quoted loan interest rates are below the Walrasian market clearing level. Generally, firms which request loans for the investment act as promary borrowers in loan markets. The availability of credit affects the amount of investment. So, credit rationing affects macroeconomic varibles through the investment of firms. The purpose of this study is to analyze the macroeconomic effects of credit rationing. For this prupose, we have examined the effects of credit rationing on real GNP, price level, interest rate of private bonds, and investment. We have tried stationarity of variables with unit root test and cointegration test. Then, we have applied vector error correction medel to variables which have stationary relation.

회복실 환자의 현황 및 SaO_2의 변동

최세진,김만수,권성범 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.2

We have reviewed 2059 cases admitted at the recovery room of Chung Nam National University Hospital from Jan. 1, 1995 to April 30, 1995 to use of the results for better guidance and management. The cases were statistically analysed by various parameters, the number of patients of recovery room admission, department, anesthetic methods, recovery score, duration of stay and change of SaO_2. The results were as follows ; 1. Patients undertook anesthesia ; case of general or regional anesthesia were 2059 among the overall recovery room admission cases 2059. Admission rate of recovery room was 83.7% (2059/2630). 2. Among the 2059 cases in the recovery room, case of obstetric and gynecology were 464 (22.5%), followed by cases of orthopedic surgery (16.9%) and cases of general surgery (15.4%). 3. Operation were carried out in most case (84.7%) under general anesthesia, followed by case under regional anesthesia (15.3%). 4. The large part of the patients (79%) have postanesthetic recovery score 9-10 at the moment of admission in the recovery room and the most part of the patients (100%) have postanesthetic recovery score 9-10 at the moment of discharge in the recovery room. 5. Most of patients (92.6%) stayed less than 1 hour in the recovery room. 6. SaO_2 of patients were greater than 96% on arrival and discharged.

폐모세포종 : 1례보고 A Case Report

최영호,서홍주,임영혁,김정중,박성강,이석기,임진수,김은규 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.2

Pulmonary blastoma is a very rare primary neoplasm of the lung. We experienced a case of pulmonary blastoma in a 40 years old man. The mediobasal segmentectomy of the right lower lobe was performed. The patient was discharge on the postoperative days 6. There is no evidence of recurrence or metastasis on followup study during 7 months period after operation.

식도를 포함한 전위장관을 침범한 전이성 악성 흑색종 1예

최정영,김준기,신성하,고영춘,조상욱,서강석,강명원,임연근,여향순,김경수 全南大醫大 2001 전남의대학술지 Vol.37 No.1