• 한국해양학회지
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• v.24 no.4
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• pp.194-205
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• 1989

In order to study the biomass of primary producer, phytoplankton is collected monthly September 1985 to August 1986 in Ch$\check{o}$nsu Bay. Phytoplankton carbon contents which are calculated from phytoplankton volume were ranged from $26.7{\mu}gC/l$ to $960.7{\mu}gC/l$, and average carbon contents of each month lie in the range of $58.6-684.7{\mu}gC/l$(annual mean $208.5{\mu}gC/l$). For net plankton analysis with the carbon contents, cell numbers, and chlorophyll concentrations show a close correlation, while for nanoplankton the correlation was low, indicating that nano-fraction includes a significant portion of picoplankton. Also, the multiple regression analysis with carbon content, cell number, and chlorophyll concentration to size fraction well illustrate the prime importance of the net-fraction in phytoplankton group. C/Chl-a ratios ranged from 9.1 to 100.5, average rations of net- and nanoplankton are 111 and 6.4, respectively. The greater net plankton faction is, the higher C/Chl-a ratio is, however in case of high nanoplankton portion C/Chl-a ratio show low level. These results indicate that the difference of C/Chl-a ratio per phytoplankton cell size be main factor for the variation of C/Chl-a ratio in Ch$\check{o}$nsu Bay. As C/Chl-a ratio fluctuates greatly in coastal ecosystem, that use of a direct conversion of convert chlorophyll to organic carbon may lead erronous estimation.

• Proceedings of the Korean Society of Grassland Science Conference
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• 1999.06a
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• pp.71.2-72
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• 1999

고등식물에 있어서 엽록체에 존재하는 저 분자량 heat shock protein (smHSP)은 식물의 내열성 획득에 있어서 필수유전자임이 mutant를 이용한 유전학적인 연구에 의해 보고된 바 있다. 고온내성이 강한 작물인 벼로부터 엽록체 smHSP cDNA를 분리하고자 벼의 잎에서 분리한 mRNA로 작성한 cDNA library로부터 screening하였다. 선발된 smHSP cDNA는 1,026 bp의 염기로 구성되어 있었으며, 239개의 아미노산으로 구성되는 예상분자량 26.6 kDa의 단백질을 code하고 있었다. 또한 다른 식물로부터(중략)

• Journal of Plant Biology
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• v.35 no.3
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• pp.259-263
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• 1992

한국 마늘에 감염되어 있는 주된 바이러스 중의 하나로 알려진 마늘 잠복 바이러스 (GMV)의 분자 구조와 병 발생 메카니즘을 이해하기 위하여, 국부 감염 숙주 식물인 Vicia faba에 연속적으로 감염시킴으로써 마늘 잠복 바이러스를 정제하였고, GMV에 대한 전신 감염성 숙주 식물로 생각되는 leek에서 GLV를 대량으로 증식시켰다. 투과전자현미경을 이용하여 바이러스 입자를 관찰한 결과, 마늘 바이러스들의 입자의 길이는 200-2000 nm의 분포를 보였으나 입자의 대부분은 600-900 nm의 범위 안에 존재하였다. 반면 순수 분리된 GLV 입자는 평균 690 nm의 길이를 보여주었고, 유연한 실 모양이었다. SDS-PAGE 분석으로 혼합 감염된 마늘 잎으로부터 분리된 마늘 바이러스의 구조 단백질은 분자량 24,500-38,000 Da의 분포를 나타내었으나, GLV 껍질 단백질의 분자량은 34,000 Da으로 나타났다.

• Korean Journal of Environmental Biology
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• v.18 no.3
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• pp.347-353
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• 2000

Standing crops of freshwater phytoplankton was studied from October 1998 to September 1999 in Hyendo, Maam, Jangam, and Napo of Kumgang River. Standing crops peaked in July in Hyendo $(39.5{\times}10^3Cells ml^{-1}), Maam (112.1{\times}10^3Cells ml^{-1}), and Jangam (125.5{\times}10^3Cells ml^{-1}), while in August in Napo (288.6{\times}10^3Cells ml^{-1}), respectively. The standing crops ranged less than 5,000 cells ml^{-1} in most of months in Hyendo and Maam, while more than 5,000 cells ml^{-1}$ throughout the year in Napo, Jangam's standing crops being intermediate. Total standing crops throughout the year increased with downstream; the standing crops of Napo was 9.6 times higher than that of Hyendo. The standing crops peaked from spring to early summer in Jangam and peaked in other seasons in Napo. The small centric diatoms Cyczotella spp., Stephanodiscus spp. and filamentous diatoms Aulacoseira spp. played an important role to form the peak of standing crops.

• The Korean Journal of Ecology
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• v.23 no.1
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• pp.45-49
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• 2000

Tolerances of aquatic plants (emergent plants) of cattail (Typha orientalis), water oats (Zizania latifolia), reed (Phragmites communis), and bulrush (Scirpus nipponicus) to salts and high NH₄/sup ＋/-N cone. of industrial wastewater were evaluated. Evapotranspiration of cattail and water oats plants was not affected when the wastewater containing 130 ppm NH₄/sup ＋/-N with electrical conductivity of 3.0 dS/m was supplied for 5 months. Shoot and root dry wt. of cattail and water oats were rather increased by irrigation of the wastewater while the biomass production of bulrush was greatly reduced. Storage nitrogen concentration in tissues of water oats and reed plants were higher than those in cattail and bulrush. Thus, water oats and reed plants were found to be the better aquatic plants to use in constructed wetlands for treating industrial wastewater of high salt and NH₄/sup ＋/-N.

• Korean Journal of Environmental Biology
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• v.20 no.1
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• pp.91-99
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• 2002

With physico-chemical environmental factors such as temperature, DO, pH, conductivity and nutrients, size fractionated of phytoplankton standing crops and chlorophyll a concentrations $(>8\mu{m},\;3-8\mu{m},\;<3\mu{m})$ and their relationships were investigated at each station of Kyungan Stream and Togyo Reservoir from April to November in 1997. The two sampling sites showed different nutrient status: Kyungan Stream was eutrophic, while Togyo Reservoir was mesotrophic. Large sizes of phytoplankton and chl. a were higher in Kyungan Stream, opposite to those of Togyo Reservoir; Standing crops of phytoplankton $(>8\mu{m)$ and chl. a $(3-8\mu{m)}$ were high in Kyung-an Stream, while phytoplankton $(3-8\mu{m)}$and chi. a $(<3\mu{m)$ were abundant in Togyo Reservoir. These results imply that phytoplankton community in the highly eutrophicated water mainly comprised the large filamentous and/or colonial algae, such as Microcystis spp. and Aphanizomenon flos-aquae, which easily enriched by nutrients loading.

• Proceedings of the Korean Society of Crop Science Conference
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• 2020.06a
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• pp.25-25
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• 2020

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.04a
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• pp.13-13
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• 2022

• Journal of the Korea Organic Resources Recycling Association
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• v.7 no.2
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• pp.35-45
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• 1999

The effect of compost to force the cultivation using various soil and vegetation was investigated 5 times in the field for 4 years. Sewage sludge compost was validated to be useful fertilizer for the growth of a plant. and the optimal amendment amounts of compost to soil depended on the kinds of soil and vegetation, and the organic contents of compost. In the case of compost with high organic content. the optimal amended compost weight was 0.12t/are in fertile-dark brown(eutrophic) soil, 0.2t/are in sandy soil(trophic) and 0.4t/are in infertile-dark brown(oligotrophic) soil, respectively. In the case of compost with low organic content. on the other hand, the amentments of compost up to 0.6t/are was allowable without negative effect on the applied vegetation. Consequently, it can be believed that the sewage sludge compost is useful fertilizer, if keep the optimal amendment amounts(0.4t/are. year) to improve soil on cultivation of vegetation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.264-274
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• 2019

This study attempted to analyze the effects of cleansing oil on skin by preferred vegetable base oil. For this, a questionnaire survey was performed against 100 people, and their face washing habit and preferred vegetable base oils were examined. Based on the results, 4 different cleansing oils were prepared and experimented. The experiment was conducted against 10 adult women in their 20-30s, and moisture level, sebum level and trans-epidermal water loss (TEWL) before and after the experiment were measured. After the test, satisfaction was measured, and the results found the followings: When asked what cleansing oil is most preferred by vegetable base oil type, 'rose hip oil' was the highest, followed by 'olive oil', 'apricot kernel oil' and 'camellia oil'. According to the clinical trials, both moisture and sebum levels increased before and after cleansing in all four cleansing oil types by the preferred vegetable base oil (p<0.001, p<0.001). In addition, TEWL decreased with a difference by base oil (p<0.01). According to a subjective satisfaction survey which was performed after the experiment, rose hip oil-contained cleansing oil (RHC) was the highest in terms of cleansing effect and satisfaction level. Consequently, it was confirmed that the cleansing oil by vegetable base oil improved skin conditions by protecting a skin barrier with a positive effect on the improvement of sebum and moisture levels and TEWL. Even though a preferred oil type and a satisfaction level may differ by preferred oil and feeling after use, cleansing oil by vegetable base can be helpful as a skin care product which eases skin dryness and protects a skin barrier.