• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.69-69
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• 2023

격자 기반의 지면모형을 구동하기에 앞서 사용자의 목적에 따른 모델의 정확도와 모델의 구동 시간의 적절한 균형을 이루는 지면 모델의 격자 크기의 설정은 중요하다. 특히, 격자 크기에 따라 화재 모의 결과 영향이 매우 클 수 있지만, 이에 관한 연구들을 거의 이루어지지 않았다. 화재 모의는 탄소 순환뿐만 아니라 물 순환에도 직접적인 영향을 미치기 때문에 이를 위한 적절한 격자 크기 설정은 중요하다. 본 연구에서는 지면모형인 NCAR Community Land Model version 5(CLM 5)-biogeochemistry (BGC) 모형과 2000년부터 2019년의 The Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2) 기상자료 이용하여서 지면 모델 격자 크기(1.9°×2.5°, 0.47°×0.63°, 0.25°×0.25°)에 따른 전 지구 규모의 화재 시뮬레이션 결과들을 분석하였다. 연평균 화재면적은 격자 크기가 제일 큰 1.9°×2.5° 격자의 시뮬레이션에서 연평균 450M ha로 가장 작게 나타났으며 격자의 크기가 작아질수록 화재의 크기는 증가하는 것으로 나타났다. 지면 모델의 격자가 작아짐에 따라 토양 입자의 분포가 세분화되고 이에 따라 투수 계수값이 증가하며 높은 토양수분의 분포들을 줄어들고 낮은 토양수분의 분포는 증가함을 확인하였다. 토양수분이 줄어듦에 따라 화재 연소성 정도를 나타내는 변수의 값이 증가하고 이에 따라 화재 발생빈도 및 화재 확산이 증가하여 지면 모델의 화재면적을 더 증가시키는 요인이 됨을 확인하였다. 이 연구를 바탕으로 하여 화재 모의의 불확실성 요소를 이해하고, 격자 크기에 따라 화재 모의 관련 매개변수의 수정이 필요할 것으로 판단된다.

• Childhood Kidney Diseases
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• v.14 no.2
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• pp.111-119
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• 2010

The maintenance of the osmolality of body fluids within a very narrow physiologic range is possible by water balance mechanisms that control the intake and excretion of water. Main factors of this process are the thirst and antidiuretic hormon arginine vasopressin (AVP), secretion regulated by osmoreceptors in the hypothalamus. Body water is the primary determinant of the osmolality of the extracellular fluid (ECF), disorders of body water homeostasis can be divided into hypo-osmolar disorders, in which there is an excess of body water relative to body solute, and hyperosmolar disorders, in which there is a deficiency of body water relative to body solute. The sodium is the predominant cation in ECF and the volume of ECF is directly proportional to the content of sodium in the body. Disorders of sodium balance, therefore, may be viewed as disorders of ECF volume. This reviews addresses the regulatory mechanisms underlying water and sodium metabolism, the two major determinants of body fluid homeostasis for a good understanding of the pathophysiology and proper management of disorders with disruption of water and sodium balance.

• Journal of Korean Academy of Nursing
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• v.26 no.3
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• pp.688-696
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• 1996

The purpose of this study was to investigate the fluid balance of the patients who were either on soft fluid diet or total parenteral nutrition. We studied 19 patients with neurologic disorders and 22 patients with oromaxillary surgery who were admitted to either D university hospital in Choognam or S general hospital in Seoul between May and November 1995. The mean age for the patients who had oromaxillary surgery was 24 years and their average hospital stay was 9 days. The mean age of the patients with neurologic disorders was 54 years and they were bedridden for average of 71 days. For the maxillary bone surgery patients we did not limit the range of their activities in the ward during data collection period. The patients with neurological disorders were bedridden and did not move around the ward. They were all either on soft fluid diet, or total parenteral nutrition. The findings of this study are as follows ; 1) The difference of the triceps skinfold thickness between the baseline and the final measurement was 0.4cm for neurologic patient group and 0.5cm for oromaxillary surgery patient group. The difference was not statistically significant in each group. 2) In the oromaxillary surgery patient group, the daily intake of fluid in the form of pure water, other beverages, fluid diet as well as IV fluid was 4581m1 while urine output was 2979ml. The difference between fluid intake and output was statistically significant, indicating that fluid intake was far more than urine output. In neurologic patient group, the daily intake of fluid including water from fluid diet and IV fluid was 2701m1 whereas urine output was 2253m1 and they were statistically significant. 3) For a more accurate assessment we adjusted the fluid balance based on weight changes during data collection period. In the oromaxillary surgery patient group. the difference between fluid intake and output was 1238m1 after weight changes being adjusted. The difference was statistically significant, suggesting fluid overload in this patient group. In neurologic patient group, the difference between fluid intake and output considering weight changes was 124ml. The difference was not statistically significant, suggesting that the fluid intake and output was well balanced in this patient group.

• 농업기술회보
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• v.47 no.4
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• pp.30-33
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• 2010

유씨엠티농법을 처음 접해보는 과수 농가를 위해 그간의 내용이 반복되지만 소상하게 설명하고자 한다. 좋은 과실은 어느 한 가지 특정한 기술만이 아닌 종합적인 기술을 통해야만 얻어지는 결과물이다. 농약을 사용하는 것은 오직 작물의 병충해를 막는 작용을 할 뿐이고 작물의 품질을 높이는데 있어 중요한 것은 역시 시비관리이다. 시비관리의 정수라 할 수 있는 유씨엠티농법은 최고의 사과와 배를 만들 수 있는 간단하고 쉬운 최선의 방법이라고 할 수 있다. 사과 배 두 작물의 시비방법은 동일하기 때문에 함께 설명하기로 한다. 원활한 수분관리를 하면서 식물의 필수 16개 원소를 균형 있고 지속적으로 공급하는 완벽한 시비관리가 가장 과학적인 영농방법이다. 퇴비는 반드시 완숙된 퇴비(속성고온퇴비)의 사용을 전제로 하고 재배에 들어 들어간다.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1998.10a
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• pp.138-141
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• 1998

양액재배용 배지로 주로 이용되고 있는 것은 암면, 질석, 코코피트와 펄라이트 등이 있다. 이러한 배지들은 토양보다 가볍고, 이용가능성이 높아 양액재배에 많이 이용되어 왔다. 그러나, 암면, 질석과 코코피트와 같은 배지를 순환식 양액재배용 배지로 이용할 경우, 암면은 정상적으로 양분의 균형을 유지하는 것이 불가능하며, 질석과 코코피트와 같은 배지는 양분조절이 어렵고 장기간 사용할 경우에는 배지의 물리화학성이 변하는 단점이 있다. (중략)

• Horticultural Science & Technology
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• v.28 no.4
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• pp.609-617
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• 2010

The effect of vase water temperature and leaf number on water relations and senescence responses was determined in cut roses. Freshly harvested 'Red Sandra' roses were re-trimmed to 50 cm leaving two or four upper leaves and held in one of three solutions: ambient temperature distilled water ($23^{\circ}C$; AT-DW), low temperature distilled water ($7^{\circ}C$; LT-DW) and low temperature preservative solution (LT-PW). Flowers were kept in an environmental controlled room. Treatment effects evaluated were vase life, flower diameter, and changes in fresh weight and water uptake. Differences in water relations were determined by measuring $CO_2$ assimilation, stomatal conductance, and stem water flux rate (SFR). The water uptake rate was significantly increased in roses in LT-DW and decreased in those in LT-PW. While showing lower solution uptake rate during vase period, roses in LT-PW exhibited greatest fresh weight, longest positive water balance duration and largest flower diameter. Flowers with two leaves attached exhibited a higher fresh weight and improved water balance, thereby extending vase life. $CO_2$ assimilation rate and stomatal conductance were significantly decreased by placing flowers in LT-PW, yet increased by reducing leaf number to two leaves on the flower stems. Compared to the upper stem, the SFR of the basal stem of roses in AT-DW was lower, whereas SFR in basal stems of roses in LT-DW was much higher, suggesting that low-temperature water improved the hydraulic conductance in the stems. In contrast, roses in LT-PW had a stable SFR during the experimental period and displayed a similar pattern in SFR between upper and basal portions of the stems. Consequently, the vase life of cut roses in LT-PW and LT-DW was extended by more than eight and four days, respectively, compared to those in AT-DW.

• Horticultural Science & Technology
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• v.28 no.5
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• pp.790-795
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• 2010

This experiment was conducted to clarify the effects of cycloheximide and holding solution on vase life of cut 'Blue Magic' iris. The vase life of iris flowers held in 3% sucrose (S) + $100mg{\cdot}L^{-1}$ hydroxy quinoline sulfate (HQS) + $50mg{\cdot}L^{-1}$ $AgNO_3$ + $100mg{\cdot}L^{-1}$ Benzylaminopurine (BA), 3% S + $100mg{\cdot}L^{-1}$ HQS + $10{\mu}M$ cycloheximide (CHI), or 3% S + $100mg{\cdot}L^{-1}$ HQS + $50{\mu}M$ CHI were much longer than those held in distilled water. Squeeze stem phenomenon that showed at a holding solution containing $200mg{\cdot}L^{-1}$ HQS disappeared at a holding solution containing $100mg{\cdot}L^{-1}$ HQS. The holding solution containing 3% S + $100mg{\cdot}L^{-1}$ HQS + $50mg{\cdot}L^{-1}$ $AgNO_3$ + $100mg{\cdot}L^{-1}$ BA extended the most effective treatments on vase life, fresh weight, water balance, and flowering of cut iris flowers. However, the holding solution containing 3% S + $100mg{\cdot}L^{-1}$ HQS + $10{\mu}M$ CHI and 3% S + $100mg{\cdot}L^{-1}$ HQS + $50{\mu}M$ CHI was not effective in solution uptake or transpiration, but did result in high water balance. Iris flowers treated with CHI at the half-open flower stage showed increases in ornamental value, such as full flower opening and extended vase life. To improve flower quality and prolonging vase life of cut iris flowers, a holding solution containing $50{\mu}M$ CHI can be used continuously from the half-open stage.

• Proceedings of the Mineralogical Society of Korea Conference
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• 1996.10a
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• pp.61-72
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• 1996

중국 토양표토의 유황함량은 27에서 967mg S/kg(평균 233.2mg S/kg, n=632)범위에 있다. 이중 홍토(Haplic Acrisols)와 황갈색토(Eutric Cambisols)는 양쯔 및 Huaihe강 사이에 중국 중앙에 분포하고 유황함량은 각각 146과 159mg S/kg이다. 황색 목장토(Gleyic Cambisols)와 회색 목장토(Umbric Fluvisols)는 가장 높은 전 유황함량과 가장 높은 유황공급력을 가지고 있으나 제일 인산석회 침출 유황함량(현지유효 유황함량으로 평가)은 가장낮다. 그러나 황갈색 및 홍토는 이와는 반대 특성을 지니고 있다. Shajiang 흑토(Calcic Vertisols)와 논토양(Mollic/Eutric Fluvisols과 Anthraquic 상)은 총 유황함량, 인산 침출 유황함량과 잠재 유황 공급력에서는 중간에 속하고 남부 Huaihe강에 걸쳐있는 논토양에서 유황함량은 재배기간중 균형 상태에 있으나 전(前)작물에서 특히 밀과 유채에서는 부족한 상태이다. 황산염($SO_4^{2-}$)은 토양중 상하로 이동 되면서 균형을 유지하여 토양 수분함량과 밀접한 관계가 있다. 따라서 제일인산칼슘 용액침출 유황 함량을 가지고 표토에서 유황의 과부족을 진단하기는 그리 쉬운 일이 아니다 중국에서 수행된 유황시비 시험에서 20개 작목에서 평균 $4.3-40\%$의 수량증수를 기록하였으며 유황시비는 증수뿐만 아니라 작물의 질을 개선하나 담배잎의 연소성은 유황함량과 부의 상관이 있다.

• The Korean Journal of Food And Nutrition
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• v.24 no.4
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• pp.649-656
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• 2011

In this study, we made Sulgidduk with commercialized dried nonglutinous rice flour and different levels of soybean curd. For physical properties of the bean curd-Sulgidduk, its water content was increased significantly with a growing addition of soybean curd. In chromaticity, its L value(brightness) and a value(redness) were decreased significantly with more bean curd while b value(yellowness) went up in Sulgidduk with a large amount of rice flour but went down significantly in the Sulgidduk with a small amount of it. Its hardness of texture was found to be the highest in the Sulgidduk with the most dried nonglutinous rice flour and it tended to be higher with more rice flour and less soybean curd. For cohesiveness, it was recorded to be the highest in the Sulgidduk without soybean curd and showed a tendency of decreasing by adding the bean curd but increased later significantly. In addition, its springiness and brittleness became larger with addition of more dried nonglutinous rice flour. From these results, the best ratio of the bean curd-Sulgidduk to increase nutrition and absorption and to satisfy physical and sensory properties, was 420 g to 500 g of soybean curd to dried nonglutinous rice flour. Moreover, it was considered to decline the calorie of Sulgidduk by adding soybean curd as a material and to contribute to its commercialization by extending storage and preservation time of soybean curd with a short expiration date.

• Korean Journal of Veterinary Research
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• v.37 no.4
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• pp.735-744
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• 1997

심방근 세포는 심방이뇨호르몬을 합성, 저장 그리고 분비하며, 세포내외 이온의 농도, 수분균형 및 혈압 등을 조절하는 것으로 알려져 있다. 또한 심방근의 인장자극에는 Atrial Natriuretic Peptide(ANP)를 2단계(분비, 유리)의 과정으로 이루어져 있으며, 이에 따른 심방이뇨호르몬의 분비 조절기전에 대하여서는 명확히 알려져 있지 않다. 따라서 본 연구는 백서의 심방근 적출관류 모델을 이용하여 protein kinase C와 ANP 조절의 상관관계를 밝히고 분비와 유리의 과정중 어떠한 과정을 이용하여 분비자극에 영향을 주는지를 관찰하기 위하여 본 실험을 실시하였다. PKC 활성제인 PMA(phorbol 12-mystrate 13-acetate)는 ANP의 유리를 현저하게 증가시켰으며, PKC 억제제인 H-7(1-(5-isoquinoline sulfonyl)-2-methyl piperazine dihydrochlo-ride)에 의해 유리를 억제시켰다. PMA와 H-7을 동시에 처리한 경우 PMA에 의하여 증가된 ANP의 유리가 H-7에 의하여 차단됨을 관찰할 수 있었다. 따라서 백서의 관류 심방에서의 ANP 분비 증가는 PKC 활성화에 의하여 이루어지며, ANP분비의 2단계중 ANP 유리에 영향을 줌을 알 수 있었다.