• 한국작물학회지
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• 제40권5호
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• pp.587-593
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• 1995

야생더덕과 재배더덕의 재배장소에 따른 생육특성, 품질 및 향기성분을 비교분석한 결과를 요약하면 다음과 같다. 1. 자생지의 기상환경은 재배지에 비해 기온이 4∼8 낮고 지온도 3 낮았으며 조도량은 재배지의 1.7% 정도였다. 2. 자생지 토양의 환경조건은 재배지 토양에 비하여 pH는 낮았으나 유기물함량은 3배 이상 높았다. 3. 야생더덕과 재배더덕의 염색체 수는 2n =16으로 같았고 자방수도 3개로 동일하였으나, 종자수는 재배더덕이 62개, 야생더덕이 132개로 야생더덕 이 2배 정도 많았다. 4. 야생더덕과 재배더덕의 생육은 재배지보다 자생지에서 저조하였으나 야생더덕은 재배지에서도 재배더덕에 비해 현저하게 떨어졌다. 5. 재배장소에 따른 더덕의 방향성분의 extract수율은 야생더덕은 재배지보다 자생지에서 높았으나 재배더덕은 재배장소에 따른 변화의 차이를 보이지 않았고 extract수율도 50% 정도 낮았다. 6. 재배지에 따른 주요 무기성분함량은 자생지보다 재배지에서 많았으며 야생더덕보다 재배더덕에서 많았다 7. 더덕의 재배장소에 따른 주요 방향성분의 변화는 dimethylbenzene, 3-ethyl-5-2- ( ethylbutyl ) -octadecane, benzaldehyde, 14, 14-dimethyl -hexadecanoate, methylhexadecenoate등이 재배더덕에서는 없는 향기성분이 야생더덕에서 검출되었으며 더덕의 향을 내는 성분은 단일성분이 작용하기 보다는 peak면적이 높게 나타난 성분들이 복합적으로 작용하여 향기를 내는 것으로 판단되었다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.445-449
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• 2005

Various methods to detect the phytoplankton/red tide blooms in the oceanic waters have been developed and tested on satellite ocean color imagery since the last two and half decades, but accurate detection of blooms with these methods remains challenging in optically complex turbid waters, mainly because of the eventual interference of absorbing and scattering properties of dissolved organic and particulate inorganic matters with these methods. The present study introduces a new method called Red tide Index (Rl), providing indices which behave as a good measure of detecting red tide algal blooms in high scattering and absorbing waters of the Korean South Sea and Yellow Sea. The effectiveness of this method in identifying and locating red tides is compared with the standard Ocean Chlorophyll 4 (OC4) bio-optical algorithm applied to SeaWiFS ocean imagery, acquired during two bloom episodes on 27 March 2002 and 28 September 2003. The result revealed that OC4 bio-optical algorithm falsely identifies red tide blooms in areas abundance in colored dissolved organic and particulate inorganic matter constituents associated with coastal areas, estuaries and river mouths, whereas red tide index provides improved capability of detecting, predicting and monitoring of these blooms in both clear and turbid waters.

• 한국세라믹학회지
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• 제42권10호
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• pp.654-659
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• 2005

The ceramic paper, which could adsorb VOC's effectively, was made by paper-making method with zeolite and ceramic fiber as main constituents. By this experiment, the optimal composition of the slurry for the ceramic paper formation was established. SEM observation showed that zeolite powder was uniformly dispersed and adhered to the paper by applying inorganic binder. The two type zeolites content in the ceramic paper was 26 wt$\%$ and its BET surface area was 131 $m^{2}$/g. The thickness and the basis weight of the ceramic paper were 0.2 mm and 130 g/$m^{2}$ respectively, and it had sufficient tensile characteristics to withstand tensile stress without tearing during corrugation. The total inorganic content of the paper was 78 wt$ \% $ and organic content was 22 wt$\%$. The equilibrium loading amount of toluene at the toluene at the toluene partial pressure of 0.2 mmHg was 3.2 wt$\%$.

• Applied Biological Chemistry
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• 제29권4호
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• pp.381-391
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• 1986

토양중(土壤中) 무기양분함량(無機養分含量) 및 흡수량(吸收量)이 당귀(當歸)의 유효성분함량(有效成分含量)에 미치는 영향(影響)을 조사(調査)하여 재배산(栽培産) 당귀(當歸)의 유효성분함량(有效成分含量)을 증대(增大)시켜 품질(品質)이 좋은 당귀근생산(當歸根生産)을 위한 기초자료(基礎資料)로 이용(利用)하고자 산지별(産地別)로 재배산(栽培産) 및 야생산(野生産)을 토양(土壤)과 동시(同時)에 채취(採取)하여 토양(土壤)및 당귀근내(當歸根內)의 무기양분함량(無機養分含量)과 decursin, decursinol 함량(含量)과의 상관관계(相關關係)를 조사(調査)하였다. 당귀근중(當歸根中) decursin 함량(含量)은 봉화산(奉化産)이 6.06%, 진부산(産)이 5.86%, 월성산(月城産)이 3.24%이었으며 야생산(野生産)은 7.65%로서 재배산(栽培産) 보다 그 함량(含量)이 더 높았다. decursin 함량(含量)은 토양중(土壤中) ${NH_4}^+-N$ 함량(含量)과 부(負)의 상관(相關)이 유효태(有效態) 인산함량(燐酸含量)과 정(正)의 상관(相關)이 인정(認定)되었다. decursin 함량(含量)은 당귀근중(當歸根中) 질소함양(窒素含量)과 부(負)의 상관(相關)이, 인산(燐酸) 및 가리함량(加里含量)과 정(正)의 상관(相關)이 인정(認定)되었다. 그러므로 당귀(當歸)의 유효성분(有效成分)인 decursin 함량(含量)은 토양(土壤) 및 당귀근(當歸根) 중(中)의 질소함량(窒素含量)이 적을수록 인산(燐酸), 가리함량(加里含量)이 많을수록 증가(增加)하는 경향이었다.

• 한국수산과학회지
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• 제49권6호
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• pp.830-837
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• 2016

Juvenile Anoplopoma fimbria (mean length $15.6{\pm}1.4cm$, mean weight $68.7{\pm}4.3g$) were exposed to 4 months with the different levels of salinity [100 (35.0), 90 (31.5), 80 (28.0), 70 (24.5), 60 (21.0), 50 (17.5), and 40 (14.0) % (psu)] for 4 months. Hematological parameters such as red blood cell (RBC) counts, hematocrit (Ht), and hemoglobin (Hb) concentrations were substantially decreased under salinities of 50% psu or lower. Of the measured inorganic plasma constituents, magnesium was notably decreased, whereas there was no effect on calcium. Among organic plasma components, glucose and cholesterol were significantly increased, and total protein was decreased. Among enzyme plasma components, glutamic oxalate transaminase (GOT), glutamic pyruvate transaminase (GPT), and alkaline phosphatase (ALP) were significantly increased under salinities of 50% psu or lower. Antioxidant responses such as glutathione S-transferase (GST) and glutathione (GSH) were significantly decreased at salinities of 50% psu or lower. The results of this study indicate that salinity affects the blood parameters, plasma constituents, and antioxidant responses of A. fimbria.

• 한국수산과학회지
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• 제40권3호
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• pp.167-177
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• 2007

We measured the salinity, pH, and concentrations of $^{222}Rn$ and nutrients in groundwater in the southeastern coastal aquifer off Busan from March to September 2005 to evaluate its submarine discharge and geochemical characteristics. Salinity in coastal groundwater increased sharply at 20 m depth and exceeded 25 ppt below 40 m during the study period, indicating that a strong transition zone between fresh groundwater and seawater developed between 20 and 40 m depths. Fresh groundwater in the upper layer of this transition zone was characterized by high pH, $^{222}Rn$, dissolved inorganic nitrogen (DIN), and dissolved inorganic phosphorus (DIP) and low dissolved inorganic silicate (DSi) relative to seawater in the lower layer. In addition, the vertical profiles of the $^{222}Rn$, DIN, and DIP concentrations imply that a strong advective groundwater flow occurs along the interface of fresh groundwater and seawater near 20 m depth. The geochemical constituents in coastal groundwater also showed strong seasonal variation, with the highest concentrations in summer (June 2005) due to the changes of groundwater recharge and sea level. This implies that the input of terrestrial chemical species into the coastal ocean through submarine groundwater discharge (SGD) could change seasonally. To ascertain the seasonal variation of SGD and SGD-driven chemical species fluxes, and associated ecological responses in the coastal ocean, more extensive studies are necessary using various SGD tracers or seepage meters in the future.

• 보존과학연구
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• 통권7호
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• pp.246-264
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• 1986

Micoromorphological alterations of sea-waterlogged woods by marinemicro-oragnisms were investigated by the light and scanning electron microscopy as a part of serial investigations on the shipwrecked materials which were excavated at the sea shore of Wando-Kun, southern coast of Korea in 1984.Deterioration of sea-waterlogged wood by marine microorganisms were varied with the wood species. The degree of deterioration even in the same wood specieswas different according to the part where it was in mud of sea-water. However, the resistance of Torreya nucifera over the marine organisms was marked. Deterioration in cell wall may be classified into three types; thinning of cell wall, separation of secondary wall from compound middle lamella and tunneling of cell wall. Thinning and separation were frequently observed, while the tunneling was rare. Among the wood cell elements of hardwoods, vessel wall was the least deteriorated. The difference degree of degradation of cell wall constituents and the accumulation of inorganic substances in cell lumen indicate that some factors to be considered for the conservation treatment were discussed. The kinds of marine microorganisms invading and/or inhabiting in wrecked wooden ship were also discussed.

• Nuclear Engineering and Technology
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• 제35권5호
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• pp.482-496
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• 2003

effectiveness of the PAM graphite-electrode technology for the treatment of many types of low-level radioactive waste including : combustible material, solidified resins in cement, inorganic materials, steel, glass, and solidified boric acid cement. The objectives of PAM-200 evaluation were to verify that 1) the facility meets air emission regulations, 2) the facility can be safely operated when processing hazardous and radioactive materials and 3) satisfactory final waste forms can be produced. Results, derived from KAERI's(Korea Atomic Energy Research Institute) analyses for samples of vitrified product, scrubbing solution and offgas collected during test period, show that PAM-200 can treat radioactive wastes as well as hazardous wastes with toxic constituents and radionuclides contained in the offgas exiting from the stack to the environment controlled to be far lower than the limit regulated by air conservation law and atomic law.

• The Korean Journal of Ecology
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• 제10권3호
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• pp.139-149
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• 1987

Mathematical models of the litter accumulation, decay and turnover in the grassland and forest ecosystems of equilibrium state of the annual litter production were established to analyse the decay rates of organic and inorganic constituents of the litter. Those models were validated by an application to a Phragmites longivalvis grassland in a delta of the River Nakdong. The decay constants of cold-water-soluble fractions, other carbohydrates, hot-water-soluble fractions, cellulose, crude fat, lignin and crude protein in the litter were 0.730, 0.583, 0.555, 0.505, 0.479, 0.331 and 0.310 respectively. The amount of mineral nutrients such as N. P. K. Ca and Mg returned annually to the soil were estimated to 7.09, 1.34, 2.36, 4.37 and 0.79g/m2 respectively.

• Korea-Australia Rheology Journal
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• 제14권2호
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• pp.71-76
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• 2002

Metal thin films, which are indispensable constituents of ULSI (Ultra Large Scale Integration) circuits, have been fabricated by physical or chemical methods. However, these methods have a drawback of using expensive high vacuum instruments. In this work, the fabrication of tungsten metal film by spin coating was investigated. First of all, inorganic peroxopolytungstic acid (W-IPA) powder, which is soluble in water, was prepared by dissolving metal tungsten in hydrogen peroxide and by evaporating residual solvent. Then, the solution of W-IPA was mixed with organic solvent, which was spin-coated on wafers. And then, tungsten metal films, were obtained after reduction procedure. By selecting an appropriate organic solvent and irradiating UV, the sheet resistance of the tungsten metal film could be remarkably reduced.