• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.170-171
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• 2001

Collagen은 생체 전체 단백질의 20∼40％를 차지하고 있는 동물 체내에 가장 많이 분포하는 단백질로써 주로 조직이나 장기를 지탱하면서 체표를 둘러싸고 있어 체형을 유지시키는 역할을 하며 특히 피부, 연골, 백 등 결합조직의 주요한 구성성분으로 전 collagen 량의 40％는 피부, 20％는 배와 연골, 그 외 혈관과 내장 등 전신에 넓게 분포하고 있다. (중략)

• Journal of the Korean Recycled Construction Resources Institute
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• v.7 no.4
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• pp.310-315
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• 2019

This study conducted a series of studies to find alternative ways to use Chlorine Bypass System-dust(CBS-dust) in cement production. The results of engineering characteristics of CBS-dust are summarized as follows. First of all, the density of CBS-dust is 2.40, lighter than cement and the pH was 12.50 which was strong alkaline. In terms of particle size, it was 11.70 ㎛ which was finer than cement. With chemical properties, calcium oxide(CaO) was the highest as 35.10%, potassium oxide(K₂O) was 32.43%, potassium chloride(KCl) was 19.46%, sulfur oxide(SO₃) was 6.81%, and the remaining chemical components are SiO₂, Fe₂O₃, Al₂O₃, MgO, and the like. Therefore, if CBS-dust is used as early-strength chemical admixtures in the concrete secondary products that use a large amount of mineral admixtures without rebar, it can be an effective method for increasing the strength of concrete as an alkali activator and preventing early-frost damage of Cold Weather Concrete.

• Korean Journal of Medicinal Crop Science
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• v.6 no.2
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• pp.91-95
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• 1998

Some physical properties and chemical compositions of Lycii Cortex depending on the various extracting conditions were investigated for their changes during extraction with ethanol and water. Solid matter and contents of total sugar in water extracts were higher than those of ethanol extract. but contents of tannic acid in ethanol extracts was higher than that in water extracts. The methanol extract of the Lycii Cortex were fractionated with ethyl ether. ethyl acetate. n-butanol and water. The yield was higher in the order of water > n - butanol > ethyl ether and ethyl acetate fraction. Turbidity of water extraction was higher than that of ethanol extraction.

• Journal of Applied Biological Chemistry
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• v.58 no.2
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• pp.189-194
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• 2015

Ten compounds were isolated from the ethanolic extract of the leaves of Acacia catechu (Fabaceae), and their structures were identified as nine flavonoids [(+)-catechin (1), (-)-epicatechin (2), (+)-afzelechin (3), (-)-epiafzelechin (4), (+)-mesquitol (5), kaempferol (6), quercetin (7), quercetin 3-methyl ether (8), and caryatin (9)] and an ellagic acid (10). The chemical structures of these compounds were identified on the basis of spectroscopic methods (mass spectrometry, 1D and 2D nuclear magnetic resonance) and comparison with literature values. This is the first time that the isolation of caryatin (9) has been reported from Acacia genus.

• Food Science of Animal Resources
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• v.21 no.4
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• pp.307-313
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• 2001

This study was carried out to examine the physicochemical and microbiological characteristics of Korean and other countries chicken circulated in Tokyo, Japan. The breast meats of Korean, Japanese, and Chinese chickens and thigh meats of Korean, Japanese, Chinese, American, and Thai chicken were used. In the proximate analysis of breast meat, Korean chicken had the lowest crude protein and crude ash(P<0.01), but showed the highest content of moisture(P<0.001). TBA values of Japanese breast meat were higher than Korean and Chinese one. In thigh meat, crude fat of American one was significantly higher than the others(P<0.001), and had very high bacterial counts. Korean chicken thigh meats showed the lowest VBN values.

• Journal of the Korean Applied Science and Technology
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• v.31 no.3
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• pp.387-393
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• 2014

In this study were performed to investigate the physicochemical properties of flying fish roe shell extract(FRSE) extracted from flying fish roe shell. FRSE was prepared using marine flying fish roe shell, and then analyzed it's physicochemical properties. The result showed that the nutritional composition of FRSE consisted of 81.00% protein, 9.12% ash and 4.48% moisture. There were OH-proline and glycine known as characteristics of collagen peptide in the amino acid analysis of FRSE, and there were large amount of glutamic acid and aspartic acid involved in the metabolism of glucose and fat. The calories of FRSE was 347 kcal/100g and molecular weight appeared less than 1,300 Da molecular weight distribution.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.330-332
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• 2003

현대 사회는 인구, 산업, 경제, 활동이 도시에 집중되어 발달되고 있으며, 도시에서의 활동증가로 인한 교통량도 급격히 증가하고 있다. 급격히 증가된 인간의 생활환경 변화로 인한 오염물질의 배출도 역시 증가하여 우리의 주변환경을 심각하게 오염시키고 있다. 대기중에 존재하는 에어로졸 입자는 자연발생원에서 직접 대기중에 배출되는 해염입자, 토양입자 등과 같은 1차 입자(Primary particle)와 주로 연소, 소각 등에 의해 인위적으로 발생된 가스상 물질의 대기중에서 다양한 물리ㆍ화학적인 반응을 통해 생성되는 2차입자(Secondary particle)로 크게 구별할 수 있다. (중략)

• Horticultural Science & Technology
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• v.33 no.3
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• pp.435-442
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• 2015

The main objective of this work was to identify and evaluate possible substrate alternatives or amendments to peat moss. This study involves the physical and chemical characterization and growth test of wood sawdust and wood fiber in order to evaluate their use as components of horticultural media. The carbohydrate content, C/N ratio, pH, phenolic compound, total porosity and water holding capacity were 58.9%, 425.1, 4.8, 181.8 ($mg{\cdot}g^{-1}$), 82.5% and 47.1% in wood sawdust and 41.1%, 240.8, 5.9, 29.8 ($mg{\cdot}g^{-1}$), 90.6% and 56.2% in wood fiber, respectively. Wood sawdust (K, $998.0mg{\cdot}100g^{-1}$ ; Ca, $1196.0mg{\cdot}100g^{-1}$; Mg, $105.6mg{\cdot}100g^{-1}$) and wood fiber (K, $1250.1mg{\cdot}100g^{-1}$; Ca, $1982.6mg{\cdot}100g^{-1}$; Mg, $173.1mg{\cdot}100g^{-1}$) showed adequate mineral elements properties compared to peat moss (K, $0.02mg{\cdot}100g^{-1}$; Ca, $0.57mg{\cdot}100g^{-1}$; Mg, $0.13mg{\cdot}100g^{-1}$) for their use as growing media. The mixtures of the horticultural media were prepared using different substrate as wood sawdust and wood fiber to grow Chinese cabbage (Brassica campestris L.) in a greenhouse. The seed germination, leaf area and stem height were 75%, $0.50cm^2$ and 2.8 cm in PS substrate (containing 30% peat moss, 10% perlite and 60% wood sawdust) and 95%, $0.65cm^2$ and 3.3 cm in PF substrate (containing 30% peat moss, 10% perlite and 60% wood fiber), respectively. The seed germination and stem height of the PF substrate (containing 30% peat moss, 10% perlite and 60% wood fiber) was higher than those in peat moss (control). Utilization of wood by-product can be considered as an alternative media component to substitute the widely using expensive peat moss.

• Clean Technology
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• v.19 no.2
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• pp.90-94
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• 2013

We investigated one-dimensional thermal conduction for gypsum objects incorporating oyster shell powder. We presumed that according to the portion of oyster shell in the hybrid structure conductive characteristics of that would also change as some physicochemical properties such as volatile organic compound (VOC) adsorption were found to be changed considerably. Based on Fourier's 2nd law of heat conduction an analytical analysis in a flat slab (one axis perpendicular to an infinite plane) was performed. We found that composition of oyster shell and conduction-related coefficients and parameters could greatly influence on the thermal profile of that conduction, and some model experiments also served for it in the affirmative.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.10a
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• pp.352-355
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• 2003

비자성이며 비전도성의 물리적 성질을 갖는 자연산 퀄쯔(quartz)와 용암석 스코리아를 대상으로 마그네타이징 처리를 하여 분석하였다. 마그네타이징 처리를 위하여 강력한 기계화학적 분쇄 반응을 시켰으며, 분쇄 반응시 알코올계의 솔벤트를 반응 용매로 사용하였다. 퀄쯔와 스코리아의 마그네타이징 처리에서 비교적 비중이 큰 퀄쯔의 경우와 비중이 작은 스코리아의 경우에도 분쇄된 분말이 물에 뜨는 것을 확인할 수 있으며, 친유성으로 기름에 대한 흡착 성질이 우수함을 확인하였다. 자연산 퀄쯔와 함께 스코리아를 바탕물질로 하여 기계-화학적 반응 기술로 고 분산성 흡착반응에 의한 고분자 물잘 생성을 유도하여 나노복합체를 제조하였다. 반응의 처리조건과 적용과정에 따라서 기계-화학적 반응을 통하여 얻어진 물질은 자기적 성질과 유전체 및 전기적 성질을 동시에 나타낸다. 부착성 융합 복합물질의 특징을 고려하여 시그니토마그네틱스(Segneto-magnetics)로 분류되는 합성분말은 특히 유류성분에 대하여 높은 흡착성을 가지며, 강한 자기적 성질을 띄는 10-50 nm 두께의 하나 또는 그 이상의 이질적 융합 화합물 층이 석영이나 수정체의 표면에 합성되어 특유의 자기, 전기적 성질을 나타낸다.