平安滑石鑛山 周邊의 植物相

文炯泰,朴元圭 공주대학교 사범대학 과학교육연구소 1986 과학교육연구 Vol.18 No.1

This is the report on the Flora of Pyong-an Talcum Mine circumference, surveyed from Mar. 1986 to Oct 1986. The tracheidophyta in investigated site was recorded 80 families, 208 genera, 250 species, I subspecies, 42 variaties and 2 forma (295 kinds). Even though the plants above the Mine were well preserved, those below the Mine were influenced ill except Eauisetum arvense and Plantage asiatica piled-up discarded ores, I guess.

高等學校 生物 實驗實習敎材의 開發硏究 Ⅰ

崔斗文,李元求,文炯泰 공주대학교 사범대학 과학교육연구소 1984 과학교육연구 Vol.16 No.1

Teaching materials available for the effective performance of laboratory experimental work in high school biology were developed, laying emphasis on the following items : environmental pollution and natural conservations, biological concepts that the degree of difficulty is high, applications of teaching materials which are developed in foreign conturies, productions of teaching materials and models. The measuring methods of size of micrography without micrometer or with a hand-made glass micrometer were developed. By observing the morphological characters of liverwort, the methods of telling its sex, distingshing its life cycle into sexual reproduction and asexual reproduction, and comparing its life cycle with those of other plants were presented. By observing the morphological characters of moss, the methods of telling its sex and comparing its life cycle with those of liverwork, ferns and flowering plants were presented. A convenient observing method of cartilaginous and bony tissues in animals was developed using the easily available material in our surrounding The observing method of extension and contraction of chromatophores induced by environmental changes on freshwater fishes was developed. The methods of sorting and identifying the higher plants by observing their leaves and flowers were presented. The improved analytical method of plant community structure was presented by using the artificial plant community within laboratory. The assesing method of harmful effects on plant tissues by sulfur dioxide was improved.

都市街路의 遲滯度推定에 관한 硏究

임채문,권강훈,이주호,김태형 대구대학교 과학기술연구소 2001 科學技術硏究 Vol.8 No.1

This study suggested input variables whose effects have been considered by adjusting various input variables in the TRANSYT-7F and NETSIM, the Simulation programs employed in calculating the delay time at street sections. The results can be summarized as follow. 1. Among the input variables in the TRANSYT-7F needed to calculate the delay time at street sections, the excluded are those which effect the most on time delay, such as bus stops, pedestrian crossings and on/off ramps. Among the input variables the most affecting factors are Saturation flow rate and time delay whose suggested quotients are well summarized in the text of this study. 2. There are variables which affect the change of time delay in the NETSIM, such as bus stop, pedestrian crossing, bus appearance period, and departure time delay. This study did the Simulation program using those variables except pedestrian crossing because, as the result of the correlation analysis suggests, there is a strong correlation between bus stop and pedestrian crossing. In this study, the survey had been done in the morning and afternoon except the Peak time, so heavily congested sections were excluded. And both sides of three street sections were surveyed. Therefore, there should be further studies on heavily congested situations and many other street sections.

여천공단 주변지역 토양의 화학적 성질

표재훈,김준호,문형태 公州大學校 基礎科學硏究所 1998 自然科學硏究 Vol.7 No.-

여천 공단 주변지역에서 대기오염물질에 의한 토양 성질의 변화를 조사하였다. 토양의 산도는 평균 4.3 ±0.31이었으며, 제석산의 기부에서 능선부로 갈수록 토양의 산도가 증가하는 경향을 보였다. 토양 유기물 및 전질소 함량은 각각 19.2±2.6%와 4.7±0.25mg/g으로 비오염 지역인 공주 근교의 토양에 비하여 높았다. 가용성 인의 경우 평균 41.2±3.7μg/g로 비오염 지역인 공주 근교의 토양에 비해 4배이상 높았다. 제석산에서는 산의 높이에따라 가용성 인의 함량변화가 매우 뚜렷하였는데, 토양의 산도가 증가함에따라 가용성 인이 불용성으로 전환되기 때문인 것으로 판단된다. Total-Sdm의 함량은 283.5±14.1μg/g으로 비오염지역인 공주 근교의 토양에 비하면 10배이상 높았다. 가용성 알루미늄의 평균 함량은 0.43±0.03mg/g으로 비오염 지역에 비해 2배정도 높았으며, 토양의 산도가 증가할수록 가용성 알루미늄의 양이 증가하는 경향을 보였다. 조사지역의 치환성 칼슘, 칼륨, 마그네슘 함량은 비오염 지역에 비해 매우 낮았다. 이는 토양의 산성화로 칼슘과 마그네슘이 세탈되었기 때문이다. Effects of air pollutants on the chemical properties of soil in Yoch'on industrial complex were investigated. Soil pH showed severe acidity with average value of 4.3±0.13. Soil pH decreased along the increase in altitute of Mt. Jeseok. Soil organic matter and total N was 19.2±3.6% and 4.7±0.25 mg/g, respectively, which were higher than those of unpolluted area, Kongju. Available P was 41.2±3.7g/g, which was 4 times greater fhan that of unpolluted area, Kongju. Average content of total-S was 283.5±14.1 g/g, which was 10 times greater than that of unpolluted area. Content of available Al was 0.43±0.03 mg/g, which was 2 times greater than that of unpolluted area. Available Al increased as the soil pH decrease. Contents of exchangeable K, Ca and Mg were significantly lower than those in unpolluted area, because of severe leaching in acid soil.

임신 종결 후 발생한 자궁 동정맥 누공에서 자궁동맥색전술로 치료한 1예

김종민,이해혁,김태희,남계현,심일구,이권해,김형문,이임순,장종호 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Arteriovenous fistula of uterus is rarely reported disease. This vascular malformation is very dangerous condition because Dilatation & curettage can cause massive uterine bleeding without accurate diagnosis. The diagnosis is made by angiography, gray scale ultrasonography, color and duplex doppler ultrasonography, computed tomography, and magnetic resonance imaging is helpful. Especially color and duplex doppler ultrasonography is allows convincing detection and diagnosis of arteriovenous fistula. Recently transcatheter uterine artery embolization is treatment of choice. We have experienced a case of arteriovenous fistula of uterus. Which is presented with a brief review of literature.

Weight Loss and Nutrients Dynamics during the Decomposition of Fine Roots

Mun, Hyeong-Tae,Pyo, Jae-Hoon,Shin, Chang-Hwan,Namgung, Jeong,Kim, Jeong-Hee The Ecological Society of Korea 2002 Journal of Ecology and Environment Vol.25 No.1

Weight loss, N and P dynamics during decomposition of fine roots (<2mm) of alder(Alnus japonica), oak (Quercus acutissima) and pitch pine(Pinus rigida) were studied for 33 months in Kongju, Korea. After 33 months, remaining weight of fine roots of alder, oak and pitch pine was 29.2%, 47.7% and 53.4% of the initial weight, respectively. The decomposition rate constant (k) for alder, oak and pitch pine was 0.448 $yr^1$, 0.269 $yr^1$, 0.228 $yr^1$, respectively. Initial concentration of N and P in fine roots was 10.32mg/g and 0.69mg/g for alder, 6.20mg/g and 0.37mg/g for oak and 7.26mg/g and 0.44mg/g for pitch pine, respectively. Initial concentration of N and P in alder were higher than those in oak and pitch pine. After 33 months, remaining N and P in fine roots was 39.5$\%$ and 31.8$\%$ for alder, 59.4$\%$ and 57.8$\%$ for oak, 63.0$\%$ and 83.4$\%$ for pitch pine, respectively. Decomposition rate and the rate of N released from decomposing fine roots was positively correlated with the initial N concentration of the fine roots.

Effects of Forest Fire on Soil Nutrients in Pine Forests in Kosong Kangwon Province

Mun, Hyeong-Tae,Choung, Yeon-Sook The Ecological Society of Korea 1996 Journal of Ecology and Environment Vol.19 No.5

Effects of forest fire on soil nutrients in pine forests were studied in Dosong, Kangwon Province in Korea. Soil samples were collected from burned sites and unburned sites (control) at Kusungri, Sampori and Wunbongri. Soil pH in burned sites was higher than that in unburned sites. Soil organic matter did not differ significantly between the burned and unburned sites. Concentrations of available phosphorus in burned soils were about 3 times higher than those in unburned sites. Also, concentrations of ammonium nitrogen were markedly increased in burned sites contrary to those of nitrate nitrogen. Total nitrogen, however, showed no significant difference between the sites. Concentrations of cations, calcium and magnesium, in burned sites were also significantly increased. Thus, even though forest fire removed the aboveground biomass of pine forests, inorganic nutrients added from ash may play a great role for growth of sprouts and seedlings after forest fire.

Biomass Estimation of Shrub Lindera obtusiloba by Allometry

Mun, Hyeong-Tae The Ecological Society of Korea 2006 Journal of Ecology and Environment Vol.29 No.5

Allometric equations for biomass measurement of the shrub species, Lindera obtusiloba, were developed. The allometric equations between $(BD)^2H$ and dry weight of leaves ($W_I$), stems and branches ($W_{sb}$), roots ($W_r$) and total weight ($W_t$) of the Lindera obtusiloba were as follows: $W_I=0.7318\;(BD^2H)^{0.6108},\;W_{sb}=0.6067(BD^2H)^{0.8355},\;W_r=0.4524(BD^2H)^{0.7608},\;W_t=1.672 (BD^2H)^{0.7664}$. The $R^2s$ between $(BD)^2H\;and\;W_I,\;W_{sb},\;W_r\;and\;W_t$ of the Lindera obtusiloba were 0.9251, 0.9571, 0.9353 and 0.9546, respectively. Root weight of this Lindera obtusiloba was about 38% of the aboveground biomass.

Litter Production and Nutrient Contents of Litterfall in Oak and Pine Forests at Mt. Worak National Park

Mun, Hyeong-Tae,Kim, Song-Ja,Shin, Chang-Hwan The Ecological Society of Korea 2007 Journal of Ecology and Environment Vol.30 No.1

Litter production, nutrient contents of each component of litterfall and amount of nutrients returned to forest floor via litterfall were investigated from May 2005 through April 2006 in Quercus mongolica, Quercus variabilis and Pinus densiflora forests at Mt. Worak National Park. Total amount of litterfall during one year in Q. mongolica, Q. variabilis and P. densiflora forests was 542.7, 459.2 and $306.9\;g\;m^{-2}\;yr^{-1}$, respectively. Of the total litterfall, leaf litter, branch and bark, reproductive organ and the others occupied 50.3%, 22.7%, 10.1 % and 16.9% in Q. mongolica forest, 81.9%, 7.2%, 3.1% and 7.9% in Q. variabilis forest, 57.4%, 12.8%, 5.6% and 24.1 % in P. densiflora forest, respectively. Nutrients concentrations in oak litterfall were higher than those in needle litter. N, P, K, Ca and Mg concentration in leaf litterfall were 13.8, 1.1, 7.2, 4.2 and 1.3 mg/g for Q. mongolica forest, 10.5, 0.7, 3.2, 3.7 and 1.6 mg/g for Q. variabilis forest, 5.3, 0.4, 1.2, 2.8 and 0.6mg/g for P. densiflora forest, respectively. The amount of annual input of N, P, K, Ca and Mg to the forest floor via litterfall was 43.36, 2.89, 21.38, 23.31 and $5.62\;kg\;ha^{-1}\;yr^{-1}$ for Q. mongolica forest, 32.28, 2.01, 10.23, 20.29 and $7.78\;kg\;ha^{-1}\;yr^{-1}$ for Q. variabilis forest, 15.80, 1.04, 3.99, 9.70 and $2.10\;kg\;ha^{-1}\;yr^{-1}$ for P. densiflora forest, respectively.

Effect of Vesicular-Arbuscular Mycorrhizae on the Growth of Bell Pepper and Corn Seedlings

Mun,Hyeong-Tae,Kim,Chong-Kyun,Choe,Du-Mun 공주대학교 사범대학 과학교육연구소 1989 과학교육연구 Vol.21 No.1

균근 형성이 고추와 옥수수의 초기생장에 미치는 효과를 조사하였다. 실험구 식물체의 균근 형성은 3주일 후부터 시작되었다. 실험기간 동안에 대조구의 식물들은 균근이 형성되지 않았고 실험구의 식물체 뿌리 조직에서는 많은 균사와 vesicules을 관찰할 수 있었다. 7주일 후 고추와 옥수수 실험구 개체들의 초장은 대조구 개체들에 비해 각각 110%와 90% 증가하였고 실험구 개체의 지상부 평균 무게는 고추와 옥수수에서 각각 88%와 71% 증가하였다. 지상부/지하부의 비는 고추와 옥수수가 대조구에서 각각 2.7과 1.8, 그리고 실험구에서 각각 4.3과 2.7 이었다. 실험구 식물의 인산 함량은 대조구에 비해 높았지만 질소함량은 실험구와 대조구 간에 유의 차가 없었다. Effects of mycorrhizal infection on the growth of bell pepper (Capsicum annuum) and corn (Zea mays) seedling have been studied by comparing plants grown in sterilized soil/sand mixtres with plants grown in sterilized soil/sand mixtures with topping the original non-sterile field soil. The original non-sterile field soil, which were taken from the bell pepper field, contained a high level of endomycorrhizal spores. After seven weeks, the shoot height of inoculated plants was increased by 110% in bell pepper, and 90% in corn compared with the control plants. The average above-ground biomass of inoculated plant was increased by 88% in bell pepper and 71% incorn compared with the control plants. The shoot/root ratios in bell pepper and corn were 2.7 and 1.8 for the control plants, and 4.3 and 2.7 for the treatment plants, respectively. Phosphorus level in inoculated plant tissue was higher than that of the control plant tissue. However, nitrogen contents were similar between the control and the treatment plants. The control plants did not form vesicular-arbuscular mycorrhizae during the experimental period.