• 농촌계획
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• 제16권3호
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• pp.143-157
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• 2010

This study provides a physical indicator of landscape that can be guidelines so as to evaluate landscape agricultural region for visual landscape planning, finds out the guideline for visual landscape planning lastly through examining importance of indicators and the preference of each indicator of landscape. The physical landscape indicators were derived from document study and questionnaire survey to evaluate visual landscape on landscape agricultural region. In addition, field study was conducted to examine and inspect the physical landscape indicator, managers' interview and photograph was took for evaluating the landscape simulation. Moreover, the important elements for visual landscape planning of landscape agricultural region, the importance of physical landscape indicator and the preferences of each indicator were derived by conducting questionnaire to experts and general publics. The physical landscape indicator guideline was established from the following procedures. In case of the land, flat area had higher preference than steep region. So, planning an agricultural area at a flat region with open space will be better than establishing an agricultural area on a steep region. In case of the kind of landscape crops, For the background of landscape agricultural region, the seashore type had the highest preference and mountain type and non-background type was followed in order. According to the study, facilities built with natural elements such as straw-roofed pavilion received high preference. Therefore, look-out shed and straw-roofed pavilion should be introduced in the landscape agriculture planning to select materials and colors to keep harmony with the nature. The result of this study could be used as a best choice for improving visual landscape of landscape agricultural region on selecting suitable land, facilities and so on. Moreover, the results of manager interview could be used as a useful tool in the management and formation of visual landscape. The landscape point evaluating visual landscape of landscape agricultural region could be used as a reference for establishing relative guideline for the direct payment program for rural landscape conservation and landscape agreement. In addition, it could be a useful reference to improve the general landscape and revitalize the rural area.

• 한국작물학회지
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• 제23권1호
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• pp.64-73
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• 1978

개간 간척답에서 발생하는 매자기의 생리생태적 특성을 조사하여 다음과 같은 결과를 얻었다. 1. 매자기는 괴경중의 눈(아)으로 부터 발아된 후 주기부에서 3~4개의 지하경이 수평적으로 신장하여 새로운 분주를 형성하고 이 분주로부터 새로운 지하경을 형성하면서 증식한다. 2. 3cm 침수조건하의 지표하 5cm 이하에 매몰된 괴경의 발아는 되지 많았다. 3. 매자기의 발아생육은 5cm 침수구에서 가장 좋았던 반면에 7cm 및 10cm 침수구에서의 생육은 현저히 떨어졌고, 0cm구에서는 발아생육치 못하였다. 4. 염분농도가 0.1~0.5% 수준일 때 매자기의 생육이 가장 왕성하였다. 5. 매자기 생육의 최적 pH는 7부근이었다. 6. 매자기는 종자에 의해서도 발아생육 되며 NaOH와 HCI 및 자상처리로 종자의 발아율은 증가되었다. 7 매자기 경엽의 생장속도는 벼에 비하여 현저히 빠르며 이러한 경향은 일반숙답보다 간척답에서 더욱 현저하였다. 8. 매자기 발생밀도의 증가에 거의 반비예적$(r=-0.80^{**})$으로 벼의 수양은 감소되어 $m^2$ 당 매자기 3본구에서는 14.3%가, 200본구에시는 45.7%의 수량 감소를 나타내었다.

• 대기
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• 제18권3호
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• pp.171-182
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• 2008

In this study, we analyzed the spatial and temporal distribution of wind resources over Korea based on hourly observational data recorded over a period of 5 years from 457 stations belonging to Korea Meteorological Administration (KMA). The surface and 850 hPa wind data obtained from the Korea Local Analysis and Prediction System (KLAPS) and the Regional Data Assimilation and Prediction System (RDAPS) over a period of 1 year are used as supplementary data sources. Wind speed is generally high over seashores, mountains, and islands. In 62 (13.5%) stations, mean wind speeds for 5 years are greater than $3ms^{-1}$. The effects of seasonal wind, land-sea breeze, and mountain-valley winds on wind resources over Korea are evaluated as follows: First, wind is weak during summer, particularly over the Sobaek Mountains. However, over the coastal region of the Gyeongnam-province, strong southwesterly winds are observed during summer owing to monsoon currents. Second, the wind speed decreases during night-time, particularly over the west coast, where the direction of the land breeze is opposite to that of the large-scale westerlies. Third, winds are not always strong over seashores and highly elevated areas. The wind speed is weaker over the seashore of the Gyeonggi-province than over the other seashores. High wind speed has been observed only at 5 stations out of the 22 high-altitude stations. Detailed information on the wind resources conditions at the 21 stations (15 inland stations and 6 island stations) with high wind speed in Korea, such as the mean wind speed, frequency of wind speed available (WSA) for electricity generation, shape and scale parameters of Weibull distribution, constancy of wind direction, and wind power density (WPD), have also been provided. Among total stations in Korea, the best possible wind resources for electricity generation are available at Gosan in Jeju Island (mean wind speed: $7.77ms^{-1}$, WSA: 92.6%, WPD: $683.9Wm^{-2}$) and at Mt. Gudeok in Busan (mean wind speed: $5.66ms^{-1}$, WSA: 91.0%, WPD: $215.7Wm^{-2}$).

• 한국미생물·생명공학회지
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• 제18권6호
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• pp.599-606
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• 1990

근해 연안 토양으로부터 Chitinase 활성이 우수한 균주를 분리하여 Aeromonas salmonicida로 동정하였으며, 분리균주의 효소생산 최적조건은 colloidal chitin 1.26, tryptone 2.95, $MgSO_4-7H_20$0.15, $K_2HP0_4$, 0.15, pH8.5, 27'C에서 48시간 진탕배양하였을 때였다. 효소의 정제는 배양액으로부터 ammonium sulfate 침전, affinity adsorption, hydroxylapatite chromatography, gel filtration을 통해 수율 29.7, 정제도 18.5배의 정제효소를 얻었다. 정제된 chitinase의 최적온도와 pH는 $50^{\circ}C$와 7.0이었고 pH 안정성은 pH5.0-9.0 사이였고 $50^{\circ}C$까지 안정하였으며 Km값은 1.276mg/ml, 분자량은 200,000 daltons으로 확인되었다.

• Current Research on Agriculture and Life Sciences
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• 제15권
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• pp.53-67
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• 1997

The objective of this study is to provide with the hydro-meteological and probabilistic characteristics of the storms of typhoons that have been passed through the Korean peninsula during the last twenty-three years since 1961. The paths and intensities of the typhoons were analyzed. Fifty weather stations were selected and the rainfall data during typhoon periods were collected. Rainfall data were analyzed for the patterns and probabilistic distributions. The results were presented to describe the areal distributions of probabilistic characteristics. The results obtained from this study can be summarized as follows: 1. The most frequent typhoon path that has passed through the Korean peninsula was type E, followed by types CWE, W, WE, and S. The most frequent typhoon intensity was type B, followed by A, super A, and e types, respectively. 2. The third quartile typhoon rainfall patterns appear most frequently followed by the second, first, and last quartiles, respectively, in Seoul, Pusan, Taegu, Kwangju and Taejon. The single typhoon rainfalls with long rainfall durations tended to show delayed type rainfall patterns predominantly compared to the single rainfalls with short rainfall durations. 3. The most frequent probabilistic distribution of typhoon rainfall event is Pearson type-III, followed by Two-parameter lognormal distribution, and Type-I extremal distribution. 4. The most frequent probability distribution model of seashore location was Pearson type-III distribution. The most frequent probability distribution model of inland location was two parameter lognormal distribution.

• 식물분류학회지
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• 제42권4호
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• pp.330-334
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• 2012

골풀과의 골풀속에 속하는 Juncus fauriei L$\acute{e}$v. & Vaniot는 일본과 러시아에 분포한다고 알려져 있는 종인데, 강원도의 하조대 해안가 사구 습지에서 이를 발견하여 보고하고자 한다. 이 식물은 줄기의 단면이 납작하고 주로 나선상으로 꼬여있고, 화피편의 가장자리가 검은색을 띄는 특징으로 국내 골풀속 내의 section Juncotypus에 속하는 근연 종인, J. decipiens (골풀), J. setchuensis (푸른갯골풀), J. haenkei (갯골풀), J. brachyspathus (참골풀)와 확연하게 구분 된다. 이러한 형태적 특징에 따라 국명을 '검정납작골풀'로 신칭하였고, 이 분류군의 사진 및 형질에 대한 기재, 근연 분류군들과 구분할 수 있는 검색표를 제시하였다.

• 농촌계획
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• 제3권1호
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• pp.54-67
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• 1997

Korean societies have been experiencing the wholesale structural changes in the rapid currents of recent openness, globalization and democratization, which effect much more heavily in rural areas than in urban areas, so rural recomposition works being an important national concern. In order to systematically reconstruct the rural structure, the decision makers, with a four step hierarchy of rural resident-residents group-community-region, should be endowed with the objective judgement on basic elements of resource potentialities under their control. In this process. rational resource evaluation works would be firstly necessiated from expert groups. Based on the view mentioned above, this study principally aimed at developing a rational evaluation framework for rural resources. For that objective, the first step of the study pigeonholed the total resources items identifiable in rural areas from the existing study results, spatial planning and field surveying data. After then, using the formalized classification criteria of resources items, a tentative goal system for rural resources evaluation was proposed and the final one determined through expert-group checking. The results obtained during the study are summarized as follows ; 1. Using the existing examples of resources identification/classification and the basic data list for county-level development planning as the principal reference ones, total rural resources elements were classified into 3 constituent units : land, natural environment and human resources, which correspond to places to work, to play and to live, respectively, as 3 constituent ones of life-supporting space. 2. Three characteristic areal types were adopted to represent the total rural areas : lowland, upland and seashore areas, and also 3 practical use types to represent the objectives of resources evaluation systems : for land use planning, natural conservation policy and village improvement planning. Thus 9 different types of goal system for resources evaluation were developed(each system by 3 areal typesX3 practical use types) 3. Each goal system has 3-tier classification steps from the higher, middle and lower one. The higher and middle steps should contain equally applicable components to all the rural areas, of which allowable number being around 3 and 4 respectively. However the lower step would contain detailed sub-components changeable to areal characteristics of which allowable number being around 7.

• 한국수산과학회지
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• 제36권3호
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• pp.225-229
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• 2003

Plant ash and soil drainage, derived by frequent mountain fires during winter, might cause biological contamination to seaweeds at seashore and river mouse area. To thalli of Ulva pertusa, maximum non-lethal concentration(MNLC), lethal concentration 50 $(LC_{50})$ and minimum lethal concentration (MLC) of pine needle ash were shown as 60, 350 and 550 mg/mL, respectively. The yellow loess and granite sand did not damage at concentrations of 20 and 200 mg/mL, respectively To thalli of Porphyra yezoensis, the MNLC, LC5O, MLC of pine needle ash were shown as 0.08, 0.4 and 1.0 mg/mL, respectively. Effects of yellow loess and granite sand were approximately 1/2 and 1/10 of the ash. To thalli of Undaria pinnatifida, the pine needle ash, yellow loess and granite sand did not damage at the concentration range of 20 to 40 mg/mL. Change of pigments $(chlorophyll\;\alpha,\;lutein,\;\beta-carotene,\;phycoerthrin)$ was also determined at the MNLC, $LC-{50}$ and MLC of pine needle ash. Among three seaweeds tested, P. yezoensis produced the most 2.7-fold of lutein and 2.3-fold of $\beta-carotene$ at $LC-{50}$ of the ash. Thus the P. yezoensis, appeared as a sensitive indicator, could be used as one of test organisms for determination of the biological effect of pollutants contaminated in marine environment.

• 대한화학회지
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• 제40권1호
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• pp.72-80
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• 1996

Chitinase를 생성하는 세균인 serratia marcescens JM을 해안 갯벌 시료로부터 분리하여, ammonium sulfate precipitation, affinity adsorption, hydroxylapatite와 Sephadex G-200 column chromatography를 통하여 정제하였다. 정제된 chitinase는 7.1% 회수율과 4.22의 정제도를 나타내었으며, 전기영동시 단일밴드를 얻을 수 있었고, SDS-PAGE에 의해 측정된 분량은 59,000으로 나타났다. 정제된 chitinase의 $K_m$과 $V_{max}$는 5.71mg/mL과 39.8 unit/mL로 나타났다. Chitinase의 최적활성 pH와 온도는 7과 50$^{\circ}C$였고 최적안정pH는 7.0이며 50$^{\circ}C$이하에서는 안정하였다. $Cu^{2+}\;Ca^{2+}$ 및 $Mg^{2+}$는 효소활성을 증가시켰으나 $Hg^{2+}$와 $I_2$는 효소 활성을 억제시켰다. 또한 cysteine은 효소활성을 증가시키나 EDTA, MIA, PCMB, 및 SDS는 효소활성을 억제시켰다. 해수 음이온 중 $MG^{2+},\;Ca^{2+},\;K^+$는 효소활성을 약간 증가시켰으나 $Na^{2+}$ 이온은 1mM이상농도에서 활성이 억제되었다. 본 논문에서 정제된 chitinase는 여러가지 특이점이 있는 serratia효소였다.

• 생명과학회지
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• 제20권2호
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• pp.219-224
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• 2010

산달래 자생특성을 전국에 걸쳐 조사하고 이들을 대상으로 생태 및 형태적인 주요형질을 검토하여 우량종의 선발과 아울러 육종과 재배에 필요한 자료를 얻고자 연구를 하였다. 자생지의 광환경은 303개의 자생지 중에서 양지는 194개인 64.0%로 가장 많았고, 반음지는 96개인 31.7%로 다음이었으며, 음지는 13개인 4.3%로 가장 적었다. 자생장소는 밭 주변 51.2%, 사찰 주변은 18.8%, 산 11.6%, 도로변 7.9%, 하천변 5.9%, 논 주변이나 해안 2.3%의 순이었다. 자생지는 $33^{\circ}N{\sim}38^{\circ}N$, $126^{\circ}E{\sim}130^{\circ}E$ 범위의 모든 지역에 널리 분포하였다. 자생양상은 개체 간에 1~10 m의 간격으로 군생하였으며 모구 주위에 3~5개의 자구가 있었다. 생육은 자생지역에 따라 차이가 있었으나 대체로 맹아기는 9월에 시작되어 익년의 3월까지이었다. 추대기는 5월이었고, 그 양상은 주아만 착생하는 것이 59.2%, 꽃과 주아가 혼생하는 것이 24.7%, 그리고 꽃만 착생하는 것이 16.1%로 3유형이 있었다.