• 한국연초학회지
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• 제9권1호
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• pp.65-71
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• 1987

In order to obtain the most suitable ageing term of Flue-cured tobacco in natural condition, leaf tobacco packed in hogshead and stored in leaf tobacco warehouse for 4 years, and the changes of major physico-chemical components were examined at three months intervals, As storage time goes by, except the moisture content, general chemical components of leaf tobacco were decreased until about 9-15 months of storage. Among them, decrement of total sugar was the most significant. After 18 months storage, the chlorophyll was decreased by 50% of initial stage. The content of essential oils, solanone, damascenone, megastigmatrienone I, II, III, IV, were approached the maximum between 12 months and 15 months of storage and then lessened by degrees.

• 생약학회지
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• 제20권4호
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• pp.243-253
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• 1989

Anatomical and physico-chemical properties of some nutrient and tonic crude drugs have been estimated and compared. Resin duct and druse crystal were observed more in Acanthopanax Cortex than in Ginseng Radix. Bast fiber bundle and solitary crystals were abandantly present in Glycyrrhizae Radix. Mucilage crude drugs contained mucilage ducts and bundles of raphides as common components and their arrangements of vascular bundles were different. TLC analysis showed different patterns of saponin, flavonoid, ${\gamma}-aminobutyric$ acid and sitosterols.

• 한국식품위생안전성학회지
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• 제6권1호
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• pp.49-56
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• 1991

인삼 엽록차의 위생화를 위한 화학 훈증제 처리 및 감마선 조사가 시료의 몇가지 이화학적 특성에 미치는 영향을 조사하였다. 녹차의 품질에 관련된 가용성분, 사포닌 및 탄닌성분은 상업적 조건 ethylene oxide 처리와 10kGy 까지의 감마선 조사에 대하여 안정하였다. 그러나 비타민 C 및 클로로필은 5kGy 이상 조사와 훈증 처리시에 유의적으로 감소되었고, 녹차의 휘발성 성분, 추출액의 색도 및 pH는 살균선량 범위인 5kGy 조사군에 비해 훈증처리군에서 변화가 심하게 나타났다 .

• 한국식품저장유통학회지
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• 제2권2호
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• pp.259-268
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• 1995

Physico-chemical components which are closely related to processed products were investigated on 10 varieties of Cheju citrus fruits. Juice ratio of Hungjin was the highest, 49.2%, while Sankyool was the lowest, 4.2%, which showed great differences among varieties. Peel ratio of Dangyooja was the highest, 46.1%, while both Navel orange and Hungjin were relatively low. Soluble solid($^{\circ}$Brix) was relatively high In Sankyool, Meiwa Kumquat, Sambokam and Iyo. Acid content was the highest, 4.86% in sudachi and relatively high in Sankyool, Natsudaidai and Dangyooja. The $^{\circ}$Brix to acid content ratio was 13.9 in Meiwa Kumquat and more than 10 in Navel orange and Hungjin. Total sugar contents of Juice were 2.78∼10.94%, while reduced sugar contents were 1.63∼6.38% which showed higher in Meiwa Kumquat, Iyo and Navel Orange. Hesperidin and naringin, the sources of biiter taste and cloudness were low in Hungjin and Iyo. Soluble solid($^{\circ}$Brix) of citrus juice showed highest statistical relationship(r=0.907) with total sugar, and was highly significant at 1% level.

• 한국환경과학회지
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• 제14권8호
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• pp.761-770
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• 2005

Scanning electron microscopy / energy dispersive X-ray analyzer(SEM/EDX) has played an important role for evaluation the source of atmospheric particle because it is a powerful tool for characterizing individual particles. The SEM/EDX system provides various physical parameters like optical diameter, as well as chemical information for a particle-by-particle basis. The purpose of the study was to classify individual particle emitted from the point sources based on clustering analysis and physico-chemical analysis by SEM/EDX. The total of 490 individual particle were analyzed at 8 point sources including coal-fired power plant, incinerator, H-C oil boiler, and metal manufacturing industry. The main components were Si and AI in the coal-fired power plant, Cl and Na in the domestic waste Incinerator, S in the H-C oil boiler and S and Fe in the metal manufactory industry, respectively.

• 한국식품과학회지
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• 제12권4호
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• pp.324-327
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• 1980

비자유(榧子油)의 물리화학적 특성을 조사한 결과는 다음과 같이 요약될 수 있다. 1) 일반분석치는 수분 12.33%, 조단백질 9.46%, 조지방질 54.29%, 섬유소 5.28%, 회분 2.13%로서 조지방 함량이 대단히 높음을 알 수 있다. 2) 비자유(榧子油)의 비중은 0.92, 굴절율은 1.47, 요드값은 127, 비누화값은 182.2, 산값은 9.5, 에스테르값은 172.7이었다. 3) 지방산의 조성은 미리스트산, 팔미트산, 스테아르산, 아라키드산 등의 포화지방산이 10%이하이며, 불포화지방산 인 올레산 31.68%, 리놀레산 46.77%, 리놀렌산 0.38%로서 리놀레산의 함량이 높고 리놀렌산은 대단히 적었다.

• 동아시아식생활학회지
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• 제11권3호
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• pp.204-208
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• 2001

This study was conducted to investigate physicochemical properties and anti-allergic properties of walnut oil. pH, acid value and iodine value of walnut oil were respectively 4.9, 0.8 and 117. Most of general composition of walnut oil was crude fat(99.9%) Vitamin A and E were 0.06 and 10.25mg/100g and the major fatty acids of walnut oil was linoleic acid(62.8%). Total phenolics and antiallergic effects of walnut oil were estimated 27mg% and 62.82% at the concentration of 0.5% ethanol walnut oil. These results suggest that the walnut oil can provide one of the valuable resource for the functional foods.

• 한국식생활문화학회지
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• 제10권5호
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• pp.443-448
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• 1995

Korean fresh elephant-foot (Amorphophalus konjak K. Koch) and its powder were analyzed and compared with foreign samples to investigate the physico-chemical characteristics of Korean konjak. The Korean fresh konjak contained 80.6% of moisture content and most of the solid component comprises much of sugar, protein and trace of fat and fibre. The mannan content of Korean konjak powder is far smaller than those of Japanese and Chinese konjak powder. The analysis of the Korean konjak revealed that glutamic acid, aspartic acid and arginine included 45% of total amount, and other amino acid was incresaed with the order of valine, serine, leucine and glycine. The Korean konjak contained a moderate amount of K component and other inorganic component was larger with the order of P, Na and Ca. The yield of refined powder obtained from dried chip of Konjak was 61.0% in Korean one and 57.5% in Chinese one. The degree of lightness of Chinese konjak powder was slightly higher than that of Korean product, but the difference could not be recognized by naked eye.

• 환경위생공학
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• 제13권3호
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• pp.128-132
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• 1998

In this study, water quality characteristics of lakes in the Seosan area are analyzed. Components water quality were analysed at 10 sampled points in each lakes, and the results were evaluated for seasonal variation. It was found that water quality was over II~III class. Most of lakes in the Seosan area which implies that are suitable as the maintenance water. The concenturation of T-N, T-P was observed IV~V class during all seasons. Particularly, T-N concenturation peaks in spring, while was lowered in other seasons. In the lake, high concenturation of T-N, T-P bring about Eutrophication when algae was growth causing various physico-chemical changes in the water. It is suggested that the water quality management strategies need to be applied for each lake.

• 한국지반환경공학회 논문집
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• 제10권3호
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• pp.47-52
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• 2009

폐기물을 적절히 관리하고 처리하기 위해 기본 자료가 되는 폐기물의 물리적 특성과 화학적 특성 분석을 위해 충주시에서 발생된 생활폐기물을 대상으로 발생원과 매립장에서 시료채취를 채취하여 겉보기밀도, 폐기물의 물리적 조성, 삼성분, 화학적 조성 및 발열량을 조사 분석하였다. 발생원별조사결과와 매립장 반입폐기물의 물리적 특성 값들은 차이가 있으나, 화학적 조성 값은 큰 차이가 없는 것으로 나타났다. 따라서 환경부에서 도입예정인 생활폐기물전처리시설(MBT(mechanical biological treatment))과 같은 폐기물중간처리 장치를 도입할 경우 물리적 조성 값을 알기위해서는 발생원별 조사가 필수적이지만, 소각로 설계를 위한 폐기물조사에서는 주로 화학적 특성 값을 이용하기 때문에 간단히 매립장에 반입되는 폐기물의 분석치만 조사하여도 큰 문제가 없는 것으로 판단된다. 폐기물의 중간처리에 중요한 생활폐기물의 물리적 성상은 가연성과 비가연성 성분으로 분석할 경우 가연성은 연평균 87.4%로 나타났고, 비가연성의 경우 연평균 12.6%이며, 생활폐기물의 발생원별 겉보기 밀도 평균은 $0.150ton/m^3$이다. 생활폐기물의 삼성분 분석결과 평균은 수분 27.6%, 가연분 60.5%, 회분 11.9%이고, 원소분석 결과 평균 원소성분에 대한 값은 C: 50.1%, H: 6.%, O: 39.5%, N: 1.9%, S: 0.5%, Cl: 1.3%이며, 저위발열량은 2,441kcal/kg이다.