• Korean Journal of Plant Resources
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• v.18 no.1
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• pp.8-14
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• 2005

This study was carried out to investigate the possibility of double cropping of safflower(Carthamus tinctotious L.) in vinyl house for rainshield culture. Planting methods, i.e., direct seeding as the first crop and direct seeding and transplanting as the second crop, were investigated. Growth characters and establishment were better in the first crop than in the second crop. Between direct seeding and transplanting of the second crop, growth was not significantly different, but establishment was much higher in direct seeding than in transplanting. Seed yield of the second crop was lower $30\~74\%$ than that of the first crop. In planting methods of the second crop, seed yield was higher in direct seeding than in transplanting. Therefore, optimum method of the second crop for double cropping of safflower in the middle parts of Korea was estimated as direct seeding.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2002.04a
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• pp.131-136
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• 2002

포도 2기작 재배는 아열대 지방인 대만 등에서 온난한 기후를 이용하여 실시되고 있다. 최근에 와서는 일본에서도 시설내 환경조절을 통하여 거봉포도를 한 나무에서 1년에 2회 생산하는 2기작 재배가 시도되고 있다. 2기작 재배 기술이 확립되면 수익의 증가가 기대됨과 동시에 하우스의 이용효율이 높아진다. 또한 수세도 쇠약해지지 않아 정상적인 가온재배에 비해서 수세 유지가 양호하다(Yamamoto, 1993). (중략)

• The Microorganisms and Industry
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• v.27 no.2
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• pp.13-22
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• 2001

방선균은 필라멘트 형태를 띤 대표적인 그램 양성 세균으로서, 다양한 자연환경에 존재하는 대표적인 토양 미생물이다. 방성균이 항생제를 포함한 다양한 구조의 많은 유용 생리활성물질을 생성하며, 이들의 생합성 시기가 세포의 배양상태 및 생장속도와관련이 있다는것은 이미 주지의 사살이다. 비록 방선균은 액체 배양 시에는 정체기((stationary phase)나 낮은 생장속도하에서만 항생제를 생성하며, 고체 배양 시에는 aerial mycelia 로 형태적분화(morphological differentiation)를 시작함과 동시에 생합성을 시작한다고 알려져 있으나, 각 방선균 및 항생제의 종류에 따른 특징적인 조절 기작은 매우 다양한 것으로 알려져 있다. 따라서 특징적인 조절 기작은 매우 다양한것으로 알려져 있다. 따라서 본 총성레서는 항생제 생합성이 조절되는 기작을 지금까지 밝혀진 방선균의 여러 생리적 인자 및 생합성 조절 유전자를 중심으로 정리해 보고자 한다. 항생제 생합성에 관하여 다양한 생리적 인자와 조절 유전자의 특정 및 이들의 상호관계에 대한 종합적인 이해는, 방선균 유래 항생제 조절 기작의 체계적인 규명뿐만 아니라, 방선균을 이용한 유용 생리활성물질의 생산성 향상에도 응용될수 있다는 점에서 매우 중요하다.

• Proceedings of the Korean Society of Crop Science Conference
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• 2019.09a
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• pp.125-125
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• 2019

• Korean Journal of Plant Resources
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• v.20 no.2
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• pp.212-215
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• 2007

To select the most suitable variety of wanggol for productivity in first and second cropping. Imsil and Gogseong varieties of wanggol with first and second cropping were shown to have the highest productivity in comparison to other varieties of wanggol used in this experiment. It showed relatively early maturing, high stem length, number of stem, and dry cortex yield. Therefore, it were concluded that Imsil and Gogseong of wanggol with first and second cropping were the most suitable varieties with high yield in the southern part of Korea.

• 농업기술회보
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• v.49 no.4
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• pp.28-29
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• 2012

우리나라 기후조건에서 참깨를 1년에 두 번 수확할 수 있는 재배방법으로 경지이용률을 높이고 농가소득도 올릴 수 있는 새로운 기술이 개발되었다. 이에 남부지역에 실천 가능한 참깨 2기작 재배기술에 대해 알아본다.

• Korean Journal of Environmental Agriculture
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• v.20 no.1
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• pp.1-7
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• 2001

We investigated the capability of the phosphate-solubilizing fungus, Penicillium sp. GL-101, to solubilize in vitro some insoluble rock phosphate via possible mechanisms: acidification of the medium, production of chelating metabolites, redox activity, and so on. GL-101 was able to solubilize rock phosphate (mostly calcium phosphate) in a liquid potato dextrose broth(PDB) medium, as determined by spectrophotometric analyses. Acidification was the major mechanism of solubilization since the pH of cultures fell below 4.0 and in cultures containing 1.0%(w/v) loess the pH dropped from 7.0 to 3.2. More than 10 mg/mL concentrations of citric acids were detected by high-performance liquid chromatography(HPLC) in the culture supernatants. Also this fungus showed the phosphatase activity (over 1.3 unit) to contribute partially releasing phosphate from rock phosphate, when supplemented with 1.0% loess in culture broth. The chelating activity of GL-101 in culture supernatants was not present because 2-ketogluconic acid, a chelating agent for the phosphate, was produced only a basal level. Therefore, the solubilization mechanism of rock phosphate by Penicillium sp. GL-101 involves both acidification due to citric acid production and phosphatase activity.

• Journal of the Korean Electrochemical Society
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• v.23 no.4
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• pp.81-89
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• 2020

To understand the performance of the electrochemical device, the analysis of the mechanism of ionic conduction is important. However, due to the ionic interaction in the electrolyte and the complexity of the electrolyte structure, a clear analysis method of the ion conduction mechanism has not been proposed. Instead, a variety of mathematical models have been devised to explain the mechanism of ion conduction, and this review introduces the Arrhenius and Vogel-Tammann-Fulcher (VTF) model. In general, the above two mathematical models are used to describe the temperature dependence of the transport properties of electrolytes such as ionic conductivity, diffusion coefficient, and viscosity, and a suitable model can be determined through the linearity of the graph consisting of the logarithm of the moving property and the reciprocal of the temperature. Currently, many electrolyte studies are evaluating the suitability of the above two models for electrolytes by varying the composition and temperature range, and the ion conduction mechanism analysis and activation energy calculation are in progress. However, since there are no models that can accurately describe the transport properties of electrolytes, new models and improvement of existing models are needed.

• Journal of Korean Society of Environmental Engineers
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• v.32 no.4
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• pp.379-392
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• 2010

In these days, constructed wetlands are applied in Korea for various purposes ; post-treatment of effluent in wastewater treatment, management of stormwater and restoration of aquatic ecosystems. However, the removal mechanisms for water pollutant in constructed wetlands are not clearly understood because they are affected by climate, influent characteristics and local constraints. Therefore, this paper is focused on the process that the pollutant, especially nitrogen and phosphorus, of the wetland is removed by. In this study, the main nitrogen removal is performed by nitrification/denitrification mechanism in the rhizosphere of constructed wetlands. And the majority of the phosphorus is removed by adsorption on the substrate of wetland. However the fate of phosphorus in wetlands can be diverse depending on the Oxidation Reduction Potential(ORP), adsorption/desorption, precipitation/dissolution, microbial effect, etc.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.57 no.2
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• pp.195-201
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• 2012

It is important to determine the optimum harvesting time that impact decisively on the quality of vegetable waxy corns. In general, it takes 20~25 days from silking to harvest according to ecotype when waxy corn hybrids were sown in April. We identified the optimum harvesting time by the ecotypes and seeding dates for the establishment of corn double cropping system of waxy corn. It takes 23~25 days from silking to harvest regardless of ecotype, when waxy corns were sown at early in April or late in June. It takes 28~31 days when Chalok1, early maturing type, was sown between in July 10, and in July 30. It takes 29~31 days when Ilmichal, medium late maturing type, was sown between in July 10 and in July 20, but 39 days were required when sown at in July 30. The cumulative temperature for harvesting was about $1700^{\circ}C{\sim}2100^{\circ}C$. The minimum cumulative temperature from seeding to harvest was approximately $600^{\circ}C$. These results will be helpful to the farmers for determining the optimum harvest time of vegetable waxy corns.