• Korean Journal of Ichthyology
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• v.30 no.2
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• pp.107-113
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• 2018

To observe species composition and seasonal variation of fish in the coastal area, monthly underwater visual census were conducted from October 2016 to September 2017 in Tongyeong, Korea. A total of 5,358 individuals belong to 45 species were observed during the study. Perciforme fish were the most dominant (29 species), followed by Scorpaeniformes (8 species), Tetraodontiformes (3 species). The most dominant species is Sebastes inermis (19.2%), and followed by Rudarius ercodes (18.5%). Thirty three species with the highest abundance were observed in October 2016 and only 4 species were observed in February 2017. Among three subtropical fishes, such as Chaetodontoplus septentrionalis, Labroides dimidiatus, and Ostracion cubicus, the latter 2 species were firstly observed in the southern coast of Korea. Compared with the previous studies using conventional tools such as beam trawl and seine net for fish collection, underwater visual census is much more efficient way to investigate fish diversity and assemblages in coastal waters.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.9
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• pp.3610-3614
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• 2010

Taxonomic compositions and species diversities of the planktonic micro algae communities were investigated 8 times during the period from May, 2006 to November, 2007 in Saemangeum water regions. Total of 191 taxa were observed; 94 diatoms, 31 chlorophytes, 24 dinoflagellates, 24 cyanophytes, 11 euglenophytes, 3 silicoflagellates, 1 cryptophyte and 3 unidentified microflagellates. During the period of this study, diversity indices of the community were changed spatio-temporally and fluctuated irregularly. It was surmised that artificial factors to the water condition such as open and lock of the dike stressed to the planktonic micro algal groups.

• Journal of the Korean Society of Food Science and Nutrition
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• v.25 no.2
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• pp.279-282
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• 1996

동양의학에서 강정 강장제로서의 귀히 여겨지는녹용의 유효성분과 또한 녹각과 그 유효성의 차이를 찾기 위해 무기질, 아미노산과 지방산 조성 등을 비교 검토하였다. 무기질 조성은 녹용과 녹각에서 Ca의 함량이 제일 높았고, Na과 K 함량도 상당히 높았으며 Hg 등 중금속은 전혀 검출되지 않았으며, 녹각에서는 Mn과 Fe이 미량 검출되었다. 녹용의 지방산은 포화지방산보다 불포화지방산 함량이 월등히 높았으며 그 중에서도 동맥경화증을 경감시킨다고 하는 docosahexaenoic acid가 43.73%로 제일 높았고, 녹각에서는 녹용에 비해 전반적으로 함량이 낮았다. 아미노산은 녹용에서 총 17종이 검출되었는데, glycine 함량이 제일 높았고, alanine과 proline 순이었다. 이는 collagen이 녹용의 상당부분을 차지한다는 것을 시사하며, 녹각에서는 비록 함량은 적었지만 10종이 검출되었으며, glutamic acid, proline, glycine과 alanine 등도 상당히 함유되어 있었다.

• Journal of Food Hygiene and Safety
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• v.4 no.3
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• pp.257-261
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• 1989

In order to evaluate the characteristics and quality of various Korean alcoholic beverage, the higher alcohols profiles were analyzed by gas-chromatography. Total amount of the higher alcohols depended on the type and class of the liquors. Gaschromatographic analysis showed that the type of Gin, Rum and Vodka except for SB contain n-propanol mainly. The amount of the higher alcohols determined was proportional to the content of the originally fermented liquor in the whisky. The difference in the ratio of iso-amyl alcohol content to that of iso-butanol may be useful as a parameter in evaluating the class of the whisky.

• Journal of the Korean Society of Food Science and Nutrition
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• v.17 no.2
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• pp.172-175
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• 1988

Composition of fatty acids and amino acids in water extracted material of cooks comb plant root was studied by HPLC and GC-MS. There are 14 kinds of fatty acids in water extracted material of cockscomb plant root, especially, hexadecadienoic acid$(C_{16:2})$ was contained. Tricoasnoic acid, lignoceric acid, cerotic acid and 1,1'-[3-(2-cuclopentylethyl:dene)-1,5-pentanediyl] bis-cyclopentane were identified by HPLC and GC-MS. There are 16 kinds of acids containing ${\alpha}-aminobutyric$ acid in water extracted material of cockscomb plant root.

• Journal of the Korean Society of Propulsion Engineers
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• v.13 no.5
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• pp.1-6
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• 2009

A development of a composite solid propellant is carried out for an application to gas generators as an energy source of rocket system. With HTPB as a propellant binder which has 80% of particle loading ratio, a favorable rheology, and moderate curing properties at the range of $-50^{\circ}{\sim}70^{\circ}C$, AN is selected as the first kind of oxidizer having the characteristics of a low flame temperature, minimal particle residual as well as nontoxic products. AP is the second oxidant for ballistic property control. A series of experiments for the improvement of physical properties were conducted and resulted in the propellant formulation having 30% of strain rate at 8 bar of max. stress.

• Korean Journal of Soil Science and Fertilizer
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• v.34 no.3
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• pp.213-236
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• 2001

The ionic composition of soil solution is related to a nutrient uptake by plant. Many models for estimating ionic composition of solution have been developed, and most of them have been used for calculating a content of mineral and ionic species in a geochemical point of view. An approximation model considering both cation and anion in soil solution was developed. Variables such as pH, Eh, EC, cations(K, Ca, Mg. Na, Fe, Mn, Al, $NH_4{^+}$), anions(Si, S, P, CY, $NO_3{^-}$, $HCO_3{^-}$ and chemical equilibria of ionic species in soil solution were input into Excel sheet. The activities of soluble ion, ionpairs and complexes of input element were estimated by Newton-Raphson method using conditional equilibrium constant calculated by Davies equation and special models. Equilibrium contents of insoluble minerals and complexes were also calculated.

• Korean Journal of Environment and Ecology
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• v.11 no.2
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• pp.177-200
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• 1997

This study has been conducted to propose the guidelines for development of ecological urban open space in Korea. The eastern area of Japan was studied as case area. It was classified into sex biotope types and the project background of each sites was analyzed. The contents and technique on the basis concept, survey of environmental and biotic condition planning and design(zoning and use planning, target selection and management), preparation and management of natural environment and management, and monitoring was analyzed. It was planned out the projects in order to create the nature experience space in urban area. It was found that development of ecological urban open space by the biotope creation technic was based on three types(environmental transfer, environmental creation, and environmental inprovement type). Also most cases of projects created the biotope by the conservation of the present enviroment and ecosystem. When the development of ecological urban open space was planned, selection of target species was seemed to very important that clearly propose to the guidelines.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.35 no.5
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• pp.413-423
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• 1990

Corn proteins have been known as nutritionally poor, being deficient in the essential amino acids. lysine and tryptophan. Improving the quality of protein in the corn grain would be a great benefit to the farmer. This study was conducted to evaluate the variation of the protein content and the protein constitution of the maize germplasms in the Crop Experiment Station in 1989. The average protein content of 101 germplasms was 11.5% with range from 8.0% to 17.3%. Elite hybrid field corns and table corns possessed 9.1-13.9% protein for the dried whole kernel. Major amino acids were glutamic acid and leucine. Lysine and methionine were limited. Varietal differences were observed in the amino acid composition. Qpm, a modified opaque-2 mutant had 1.4-1.7 times higher lysine content than Suwon 19, a dent corn and Suwon SS-21, a sweet corn. Suwon SS-21 had high threonine content. Maize seed protein gave three fractions. an alchol-soluble fraction (zein), an alkali-soluble fraction (glutelin), and a salt-soluble fraction (globulin) by the Osborne method. The zein fraction accounted respectively for 50.7% and 41.7% of the total protein is Suwon 19 and Suwon SS-21. The nonzein fractions increased in percentage of total protein in Qpm kernels. The amino acid composition of zein fraction from three types maize endoperms of dent, sweet and opaque-2 was essentially identical. Zein contained the high contents of glutamic acid and leucine but low content of lysine. The glutelin fractions of three types maize endosperms were mainly similar in overall amino acid composition. The lysine content of glutelin was higher than that of zein. The amino acid composition of globulin fraction was some different from those of zein and glutelin In Qpm it had higher levels of histidine and lysine than both of zein and glutelin. The increased lysine content in Qpm was resulted from changing the proportions of proteins which contained different levels of lysine.

• 한국해양학회지
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• v.18 no.2
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• pp.111-116
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• 1983

A semi-quantitative investigation on the subtidal macrobenthic community was carried out using dredge in Garolim Bay from February 1980 to June 1981.Of the 340 species of benthic fauna collected,the most dominant species with the numerical abundance of 12.3% was an ophiruroid,Ophiactis modesta which had a strong colony nature.Garolim Bay was also dominated by many suspension-feeders like Ophiactics modesta and Musculista senhousia. Due to hetergenorous sediments,Garolim Bay appeared to be rich and diverse in the faunal composition.Based on th topography of the bay and sediment types,the study area is easily divied into two zones;inner bay and outward bay area.