• Proceedings of the Korean Society of Fisheries Technology Conference
• /
• 2000.05a
• /
• pp.379-380
• /
• 2000

최근 수산자원의 이용, 관리 및 환경보전 등의 문제를 생태계 보존이라는 관점에서 해석하고 풀려고 하는 시도가 활발히 이루어지고 있다. 따라서 단위 생태계의 구조와 기능을 이해하고 밝히는 것이 주요한 연구과제로 대두하고 있다. 특히, 생태계의 하부 영양구조인 영양염-식물플랑크톤-동물플랑크톤의 상호관계를 밝히는 것은 어류 등과 같은 상부 영양구조의 변동을 파악, 예측하는데 있어 매우 중요하다. 본 연구는 한국 연근해의 영양염-식물플랑크톤-동물플랑크톤의 시공간적 변동 특성과 이들의 상호관계를 논의하였다. (중략)

• Korean Journal of Ecology and Environment
• /
• v.34 no.2 s.94
• /
• pp.133-139
• /
• 2001

For elucidating the effective management for nutrients removal by the phytoplankton growing at the effluents of night soil and sewage treatment plant, the dilution rates, physical operation conditions and duration of culture were defined. For nutrients removal from effluent of night soil treatment plant, lower the dilution was better, and Scenedesmus sp. was dominant. For removal from the effluent of sewage treatMent plant, the proper operation conditions were 50% of dilution rate, stirring and 2 days culturing. With these conditions, the removal rate of TKN was 88%, DIP$70{\sim}80%$ and the chlorophyll concentration reached at $1,300\;mg/m^3$ chlorophyll a concentration. the variation of chlorophyll a was highly corrrlated with ammonia ($r^2\;=\;0.96$) and DIP ($r^2\;=\;0.92$).

• Proceedings of the Korea Society of Environmental Biology Conference
• /
• 2002.05a
• /
• pp.42-42
• /
• 2002

• Proceedings of the Korean Nutrition Society Conference
• /
• 2001.05a
• /
• pp.117-119
• /
• 2001

• Proceedings of the Korean Nutrition Society Conference
• /
• 2003.10a
• /
• pp.141-141
• /
• 2003

• Journal of Life Science
• /
• v.29 no.7
• /
• pp.769-773
• /
• 2019

In this study, the migration route and the absorption rate of calcium and magnesium in apple leaves were compared and analyzed using plant nutrients prepared by wet nano-grinding technology. The plant nutrients were sprayed onto the leaves to confirm the component content and the movement route of the nanoized calcium and magnesium. At 2, 4, and 8 weeks after the plant nutrient treatment, the apple leaves were divided into petiole, lamina, and side, and SEM and EDS were used to measure the calcium and magnesium contents. The calcium and magnesium contents of the petiole increased from the 4th week after plant nutrient application to 1,115% at the 8th week. The calcium and magnesium contents of the lamina decreased after spraying but increased after 4 weeks. The calcium and magnesium contents increased in the side of the leaves compared to the control, reaching 673% after 4 weeks. The calcium and magnesium contents increased with increasing duration in all plots when compared with the control unsprayed leaves, suggesting that the usually poorly soluble calcium and magnesium were transferred from the petioles to the lamina. The results of this study indicate that improved calcium and magnesium absorption could be obtained in crops other than apples using plant nutrients produced through wet nano-processing technology. This technology is also expected to be applicable to natural products and bioindustries.

• Proceedings of KOSOMES biannual meeting
• /
• 2006.05a
• /
• pp.117-120
• /
• 2006

The objective of this study was to evaluate the relationship between nutrients and phytoplankton; and phytoplankton and organic matter. In order to examine the limiting nutrient for phytoplankton, Redfield ration was used and revealed nitrogen limitation. Nitrogen limitation was greatest with a 4.7 DIN/DIP ratio especially during the summer season. Chl.-a increase by 79% and 97% in spring and summer, respectively, compared to winter. COD was lowest with 0.84mg/l in winter and highest with 1.12mg/l in summer. The interrelationship between nutrients and Chl.-a was high. Relationship coefficient$(r^2)$ between DIN and Chl.-a, and DIP and Chl.-a were 0.93 and 0.89, respectively. This suggests Nutrients might be utilized at the increase of phytoplankton. Also, Relationship coefficient$(r^2)$ between Chl.-a and COD was 0.78. COD production rate was calculated with Regression Equation. The COD production rate was 25% in winter and 40% in summer.

• Health and Mission
• /
• s.8
• /
• pp.23-23
• /
• 2007

식물인간 상태에 있는 환자를 둘러싼 윤리적 문제 중 특별히 관심 가져야 하는 것은 인공적으로 전달하는 영양과 수분이다. 식물인간 상태에서의 영양과 수분의 공급은 그것이 명백히 무의미한 것으로 증명되지 않는 한 도덕적 의무라는 주장을 하고자 한다.

• Proceedings of the Korean Society of Fisheries Technology Conference
• /
• 2001.05a
• /
• pp.275-276
• /
• 2001

한반도에 자생하는 해산현화식물인 거머리말속 (Zostera, 잘피)의 거머리말 (Zostsra marina), 애기거머리말 (Z. japonica), 수거머리말(Z. caulescens)과 포기거머리말 (Z. caespitosa)들은 연안의 사질과 사니질에 생육하며 생태계에 중요한 역할을 담당한다. 이들 식물의 군집들은 조간대와 조하대에 침수 또는 노출되어 생육하면서 영양염과 중금속 순환에 중요한 역할을 수행한다. 식물체는 유기쇄설물을 먹이연쇄에 공급하는 기능을 하며, 중금속을 고등 영양단계로 수송하는 역할을 한다. (중략)

• Plant Disease and Agriculture
• /
• v.2 no.2
• /
• pp.23-29
• /
• 1996

최근에 농업기술의 발달로 작물의 재배환경과 재배기술 또한 날로 개선되어 가고 있으나 농촌인력의 부족과 재배자의 고령화로 인한 토양 비배 관리의 소홀, 화학 비료의 과다 및 편중 사용, 토양산도 변화에 따른 작물의 영양 흡수 불균형으로 인한 각종 생리적 장해의 발생과 하우스 재배면적의 증가로 인한 연작장해의 발생이 심각한 문제로 대두되고 있다. 본 강좌에서는 $\mathbb{\ulcorner}$영양생리 장해의 발생현황과 발생조건$\mathbb{\lrcorner}$과 $\mathbb{\ulcorner}$영양생리 장해의 진단$\mathbb{\lrcorner}$에 이어 작물 재배시에 발생하는 각종 $\mathbb{\ulcorner}$영양생리 장해의 대책$\mathbb{\lrcorner}$을 소개한다.