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        • KCI등재

          반응표면분석을 이용한 생강의 추출효율 및 기능성에 대한 모니터링

          임태수,권오준,권중호,김현구,Lim, Tae-Soo,Kwon, O-Jun,Kwon, Joong-Ho,Kim, Hyun-Ku 한국식품영양과학회 2007 한국식품영양과학회지 Vol.36 No.3

          반응표면분석법을 이용하여 생강의 추출조건에 따른 기능성을 모니터링하였다. 중심합성계획법에 따라 마이크로웨이브 에너지($30{\sim}150\;watt$), 에탄올 농도($0{\sim}100%$), 추출시간($1{\sim}9$분)을 달리하였을 때 회귀식 $R^{2}$는 추출수율, 전자공여작용, tyrosinase 저해효과 및 polyphenol 함량이 각각 0.9152, 0.9239, 0.9696과 0.9057로 분석되었다. 조건별 추출물의 수율, 전자공여능, tyrosinase 저해효과, polyphenol에 대한 4차원 반응표면을 superimposing하여 얻은 최적 추출조건 범위는 마이크로웨이브 에너지 $0{\sim}80\;watt$, 에탄올 농도 $0{\sim}40%$, 추출시간 $3{\sim}7$분으로 나타났다. 최적 추출조건 범위 내의 임의의 조건인 마이크로웨이브 에너지 50 watt, 에탄올 농도 20%, 추출시간 5분을 각각의 회귀식에 대입하여 얻은 예측값은 추출물의 수율 22.92%, 전자공여능 35.76%, tyrosinase 저해효과 56.52%, polyphenol 함량은 37.68%로 나타났다. Extraction characteristics of ginger (Zingiber officinale) and the functional properties of the corresponding extracts were monitored by the response surface methodology (RSM). The maximum extraction yield of 38.83% was obtained under the specific extraction conditions, such as microwave power of 126.68 W, ethanol concentration of 53.39% and extraction time of 8.15 min. The maximum electron donating ability (EDA) was found as 77.92% at the conditions of 58.25 W microwave power, 91.87% ethanol concentration and 5.54 min extraction time. The maximum inhibitory effect on tyrosinase was 79.39% at 106.08 W, 2.06% and 5.61 min. The maximum polyphenol content was 105.59% under the extraction conditions of 81.82 W, 99.52% and 4.06 min. Based on superimposition of four dimensional RSM with respect to extraction yield and electron donating ability and polyphenol content obtained under the various extraction conditions, the optimum ranges of extraction conditions were found to be microwave power of $0{\sim}80\;W$, ethanol concentration of $0{\sim}40%$ and extraction time of $3{\sim}7$ min.

        • KCI등재

          용매에 따른 양송이 추출물의 생리활성 효과

          임태수,도정룡,권오준,김현구,Lim, Tae-Soo,Do, Jeong-Ryong,Kwon, O-Jun,Kim, Hyun-Ku 한국식품영양과학회 2007 한국식품영양과학회지 Vol.36 No.4

          갈색과 흰색 양송이를 열수, 50% 에탄올 및 100% 에탄올 등의 추출용매를 사용하여 건물 중량의 10배에 해당되는 부피(w/v)일 때, 추출물의 생리활성을 탐색하였다 전자공여 작용의 경우 갈색양송이의 50% 에탄을 추출물에서 66.54%의 높은 전자공여능을 나타내었으며, SOD 유사활성을 측정한 결과 갈색양송이의 열수 추출물이 55.42%로 다른 추출물에 비해 높은 활성을 보여주었다. Tyrosinase저해활성의 경우 두 종류 모두 100% 에탄을 추출물에서 높은 저해활성을 보여주었으며, 갈색양송이가 흰색양송이보다 다소 높은 활성을 나타내었다. 특히 비교물질인 0.1% L-ascorbate와 유사한 활성을 보여주었다. 총 폴리 페놀 함량의 경우 두 종류 모두 열수 추출물보다 50%, 100% 에탄을 추출물에서 높은 함량을 나타내었다. 아질산염 소거작용을 측정한 결과 pH 1.2일 때 갈색양송이와 흰색양송이 모두 소거능이 높게 나타났다. Physiological activities of Agaricus bisporus extracts were examined. Nitrite-scavenging activity, superoxide dismutase (SOD)-like activity and electron-donating ability (EDA) of Agaricus bisporus extracted with water, 50%, and 100% ethanol were measured. Nitrite- scavenging activities at pH 1.2 were the most effective in water and 50% ethanol extracts from brown and white Agaricus bisporus samples. SOD-like activities of water and 50% ethanol extracts of both samples were $19.02{\sim}55.42%$ lower than those of 1.0% and 0.1% L-ascorbate solutions. SOD-like activities of brown Agaricus bisporus extracts were higher than those of white Agaricus bisporus extracts, and water extracts of the samples were the highest. EDAs of brown Agaricus bisporus extracts were higher $(40.35{\sim}66.54%)$ than those of white Agaricus bisporus extracts, while those of both extracts were lower than 1.0% and 0.1% L-ascorbate solutions. The results will be useful for understanding the physiological activities of Agaricus bisporus extracts.

        • SCOPUSKCI등재

          2차원 충돌 분류계에서 사다리형 로드 배열에 의한 열전달 촉진 효과

          임태수,금성민,이창언,Lim, Tae-Soo,Kum, Sung-Min,Lee, Chang-Eon 대한기계학회 2001 大韓機械學會論文集B Vol.25 No.11

          The objective of this study was to investigate the characteristics of air flow and heat transfer caused by trapezoid rods array in impinging air jet system. Trapezoid rods have been set up on front of flat plate to act as a turbulence promoter. Local Nusselt numbers were determined as a function of three parameters : (a) the space from re(Is to heating surface(C=1, 2, 4mm), (b) the pitch between each rods(P=30, 40, 50mm), (c) the distance from nozzle exit to flat plate(H/B=2, 6, 10). The measurements were compared with those of the experiment without trapezoid rods. As a result, when rods are installed in front of the impinging palate, the acceleration of the flow and the eddies due to the rods seem to contribute to the heat transfer enhancement. Heat transfer performance was best under the condition of C=1mm and as the pitch is 30mm. The maximum rate of heat transfer augmentation is about 1.9 times greater compared to that without trapezoid rods.

        • KCI등재

          반응표면분석을 이용한 양파의 추출효율 및 기능성에 대한 모니터링

          임태수(Tae-Soo Lim),도정룡(Jeong-Ryong Do),권오준(O-Jun Kwon),김현구(Hyun-Ku Kim) 한국식품영양과학회 2007 한국식품영양과학회지 Vol.36 No.1

          반응표면분석법을 이용하여 양파의 추출조건에 따른 기능성을 모니터링하였다. 중심합성계획법에 따라 마이크로 웨이브 에너지(30~150 watt), 에탄올 농도(0~100%), 추출시간(1~9분)을 달리하였을 때 회귀식 R2는 추출수율, 전자공여작용, tyrosinase 저해효과 및 SOD 유사활성에서 각각 0.8835, 0.8759, 0.8067과 0.8926으로 분석되었다. 조건별 추출물의 수율, 전자공여능, tyrosinase 저해효과, SOD 유사활성에 대한 4차원 반응표면을 superimposing하여 얻은 최적 추출조건 범위는 마이크로웨이브 에너지 0~120 watt, 에탄올 농도 70~90%, 추출시간 2~10분으로 나타났다. 최적추출조건 범위내의 임의의 조건인 마이크로웨이브 에너지 60watt, 에탄올 농도 80%, 추출시간 6분을 각각의 회귀식에 대입하여 얻은 예측값은 추출물의 수율 17.88%, 전자공여능 17.81%, tyrosinase 저해효과 42.51%, SOD 유사활성 27.35%로 나타났다. Extraction characteristics of onion (Allium cepa) and the functional properties of corresponding extracts were monitored by the response surface methodology (RSM). The maximum extraction yield of 44.02% was obtained under the specific extraction conditions, such as microwave power of 143.13 W, ethanol concentration of 61.77% and extraction time of 3.39 min. The maximum electron donating ability (EDA) was found as 45.85% at the conditions of 143.55 W microwave power, 27.52% ethanol concentration and 4.86 min extraction time. The maximum inhibitory effect on tyrosinase was 65.40% at 132.29 W, 36.47% and 7.62 min. The maximum superoxide dismutase (SOD)?like activity was 69.84% under the extraction conditions of 99.41 W, 8.47% and 7.13 min. Based on superimposition of four dimensional RSM with respect to extraction yield, electron donating ability and SOD?like activity obtained under the various extraction conditions, the optimum ranges of extraction conditions were found to be microwave power of 0~120 W, ethanol concentration of 70~80% and extraction time of 2~10 min.

        • Effectively Managing Data Warehouse System for Geographic Woods Information

          임태수(Tae-Soo Lim),강석호(Suk-Ho Kang) 한국정보과학회 데이터베이스 소사이어티 2004 데이타베이스 연구 Vol.20 No.3

          자연수림과 천연자원에 대한 최신정보의 정확한 관리를 위해서 효과적인 의사결정지원 기법이 필요하다. 본 연구에서는 데이터 웨어하우스에 입각하여 오랜 기간 축적된 운영관리 데이터를 유용한 정보로 변환시키는 방법 및 그 구현에 대해 살펴보았다. 데이터웨어하우스는 데이터의 저장과 분석을 통한 정교하고도 잘 성숙된 데이터베이스 기술을 사용하므로 전략적 의사결정을 위하여 매우 적합하다고 판단되었다. 이러한 데이터웨어하우스 모델링을 활용하여 운영계데이터를 재가공하고 통합하고, 저장하여 조림과 천연자원에 대한 통합적 관리에 있어서 효과적으로 적용한 연구이다. A data warehouse (DW) is known to be appropriate for strategic decision-making, since it is based on large scale and mature database technology that stores and analyzes data to aid decision support. This paper introduces DW technique, which provides an enterprise solution for those companies that have collected a lot of operational data over the years and need to develop a way to turn that data into useful information. In order to manage current and accurate information about woods resources, woods organizations need to have effective decision-making techniques. This paper effectively applies DW modeling process, in which operational data is re-processed, aggregated and stored in base tables, to an integrated woods resources management

        • KCI등재

          호부추와 실부추 추출물의 생리활성 효과

          임태수(Tae?Soo Lim),오현인(Hyun?In Oh),도정룡(Jeong?Ryong Do),김현구(Hyun?Ku Kim) 한국식품영양과학회 2006 한국식품영양과학회지 Vol.35 No.3

          호부추(Allium tuberosum)와 실부추(Allium senescens)를 열수, 50% 에탄올 및 100% 에탄올 등의 추출용매를 사용하여 건물 중량의 10배에 해당되는 부피(w/v)일 때, 추출물의 생리활성을 탐색하였다. 전자공여작용의 경우 호부추의 50% 에탄올추출물에서 41.68%의 높은 전자공여능을 나타내었으며, SOD 유사활성을 측정한 결과 호부추의 열수추출물이 36.33%로 다른 추출물에 비해 높은 활성을 보여주었다. Tyrosinase 저해활성의 경우 두 종류 모두 열수추출물에서 높은 저해활성을 보여주었으며, 호부추가 실부추보다 다소 높은 활성을 나타내었다. 특히 비교물질인 0.01% L-ascorbate와 유사한 활성을 보여주었다. 총 폴리페놀 함량의 경우 두 종류 모두 열수추출물보다 50%, 100% 에탄올추출물에서 높은 함량을 나타내었다. 아질산염 소거작용을 측정한 결과 pH 1.2일 때 호부추와 실부추 모두 소거능이 높게 나타났다. 이와 같은 결과는 부추의 생리활성을 밝혀 기능성 소재로써 이용도가 크게 증가할 것으로 판단된다. Physiological activities of Allium tuberosum and Allium senescens were examined. Nitrite?scavenging activity, superoxide dismutase (SOD)?like activity and electron?donating ability (EDA) of leeks extracted with water, 50%, and 100% ethanol were measured. Nitrite?scavenging activities at pH 1.2 were most effective in water and 50% ethanol extracts from both samples. SOD?like activities of water and 50% ethanol extracts of both samples were 18.21~36.33% lower than those of 1 and 0.1% L?ascorbate solutions. SOD?like activities of A. tuberosum extracts were higher than those of A. senescens extracts, and water extracts of samples were the highest. EDAs of A. tuberosum extracts were higher (30.59~49.68%) than those of A. senescens extracts, while those of both extracts were lower than 1 and 0.1% L?ascorbate solutions. The results will be useful for understanding the physiological activities of leek extracts.

        • KCI등재
        • A Meta-Model for the Storage of XML Schema using Model-Mapping Approach

          김훈태,임태수,홍근희,강석호,Lim, Hoon-Tae,Lim, Tae-Soo,Hong, Keun-Hee,Kang, Suk-Ho Korean Institute of Industrial Engineers 2004 산업공학 Vol.17 No.3

          Since XML (eXtensible Markup Language) was highlighted as an information interchange format, there is an increasing demand for incorporating XML with databases. Most of the approaches are focused on RDB (Relational Databases) because of legacy systems. But these approaches depend on the database system. Countless researches are being focused on DTD (Document Type Definition). However XML Schema is more comprehensive and efficient in many perspectives. We propose a meta-model for XML Schema that is independent of the database. There are three processes to build our meta-model: DOM (Document Object Model) tree analysis, object modeling and storing object into a fixed DB schema using model mapping approach. We propose four mapping rules for object modeling, which conform to the ODMG (Object Data Management Group) 3.0 standard. We expect that the model will be especially useful in building XML-based e-business applications.

        • KCI등재

          마그네슘환원에 의한 지르코늄-티타늄 합금분말 합성

          이동원,박근태,임태수,이혜문,유지훈,Lee, Dong-Won,Park, Geun-Tae,Lim, Tae-Soo,Lee, Hye-Moon,Yu, Ji-Hun 한국분말야금학회 2011 한국분말야금학회지 Vol.18 No.4

          Zr-Ti alloy powders were successfully synthesized by magnesium thermal reduction of metal chlorides. The evaporated and mixed gasses of $ZrCl_4+TiCl_4$ were injected to liquid magnesium and the chloride components were reduced by magnesium leading to the formation of $MgCl_2$. The released Zr and Ti atoms were then condensed to particle forms inside the mixture of liquid magnesium and magnesium chloride, which could be dissolved fully in post process by 1~5% HCl solution at room temperature. By the fraction-control of individually injected $ZrCl_4$ and $TiCl_4$ gasses, the final compositions of produced alloy powders were changed in the ranges of Zr-0 wt.%~20 wt.%Ti and their purity and particle size were about 99.4% and the level of several micrometers, respectively.

        • KCI등재

          열화학적 방법에 의한 산소센서용 세리아 나노분말 합성

          이동원,최준환,임태수,김용진,Lee Dong-Won,Choi Joon-Hwan,Lim Tae-Soo,Kim Yong-Jin 한국분말야금학회 2006 한국분말야금학회지 Vol.13 No.3

          The nanostructured cerium oxide powders were synthesized by spray thermal decomposition process for the use as the raw materials of resistive oxygen sensor. The synthesis routes consisted of 1) spray drying of water based organic solution made from cerium nitrate hydrate ($Ce(NO_3){_3}6H_2O$) and 2) heat treatment of spray dried precursor powders at $400^{\circ}C$ in air atmosphere to remove the volatile components and identically to oxidize the cerium component. The produced powders have shown the loose structure agglomerated with extremely fine cerium oxide particles with about 15 nm and very high specific surface area ($110m^2/g$). The oxygen sensitivity, n ($Log{\propto}Log (P_{O2}/P^o)^{-n}$ and the response time, $t_{90}$ measured at $600^{\circ}C$ in the sample sintered at $1000^{\circ}C$, were about 0.25 and 3 seconds, respectively, which had much higher performances than those known in micron or $100{\sim}200nm$ sized sensors.

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