• 제목/요약/키워드: T500

검색결과 1,747건 처리시간 0.03초

용매에 따른 카레 향신료 추출물의 항산화 효과 및 혼합효과 (Antioxidant and Mixture Effects of Curry Spices Extracts Obtained by Solvent Extraction)

  • 안채경;이영철;염초애
    • 한국식품과학회지
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    • 제32권3호
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    • pp.491-499
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    • 2000
  • 카레분의 단품향신료와 카레분(curry powder)을 메탄올, 에틸아세테이트, 헥산으로 추출하여 수율, 항산화 효과, 총페놀함량, 총토코페롤 함량을 측정하였다. 메탄올, 에틸아세테이트, 헥산의 추출 수율은 각각 $6.4{\sim}42.9$, $3.9{\sim}26.2$, $1.6{\sim}29.2\;%$로 극성이 높아질수록 수율이 증가하였다. 미강유의 각 용매별 추출물을 1,500ppm 첨가하여 Rancimat로 유도기간을 측정한 결과 메탄올 추출물은 rosemary, sage, ginger, turmeric, nutmeg 순으로 우수하였고, 에틸아세테이트 추출물은 rosemary, sage, oregano, thyme, ginger의 순이었으며 헥산 추출물은 rosemary, sage, oregano, ginger, thyme 순이었다. 1,500ppm을 미강유에 첨가하였을 때 BHT보다 유도기간이 길게 나타난 향신료는 3가지 용매 추출물에서 공통적으로 rosemary, sage, ginger, oregano, thyme이었으며 이들 향신료를 200, 500, 1,000, 1,500, 2,000 ppms 농도로 미강유에 첨가한 후 유도기간을 측정한 결과 rosemary와 sage는 헥산 추출물 2,000ppm에서, ginger는 메탄올 추출물 2,000ppm에서 우수한 효과를, oregano와 thyme은 에틸아세테이트 추출물이 1,500ppm과 2,000ppm에서 큰 차이 없이 우수한 효과를 나타내었다. Rosemary의 혼합에 따라 ginger와 thyme의 항산화 효과가 크게 증가함을 알 수 있었으나 상승효과라기 보다는 rosemary로 인한 유도기간의 연장 효과였다. 총페놀 함량은 메탄올 추출물은 $17,924{\sim}801\;mg%$, 에틸아세테이트 추출물은 $13,893{\sim}57\;mg%$, 헥산 추출물은 $6,864{\sim}12\;mg%$이었으며 총페놀함량과 항산화 효과가 일치하지는 않았다. 토코페롤의 경우 oregano가 3194.8mg%로 가장 높았으며, sage 1014.8 mg%, rosemary 571.1 mg%, thyme 187 mg%였고 ginger에서는 토코페롤이 검출되지 않았으며 토코페롤함량과 항산화 효과는 뚜렷한 상관관계가 발견되지 않았다.

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초임계수 산화공정에서 Ethylenediaminetetraacetic Acid (EDTA) 분해 최적화 연구 (Optimal Condition for Decomposition of Ethylenediaminetetraacetic Acid (EDTA) in Supercritical Water Oxidation)

  • 이현철;인정현;김종화;이창하
    • Korean Chemical Engineering Research
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    • 제43권2호
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    • pp.318-323
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    • 2005
  • 초임계수 산화는 난분해성 유기화합물의 분해를 위한 공정으로 각광받고 있다. 본 연구에서는 연속반응기에서 온도 $387-500^{\circ}C$, 압력 250 bar의 초임계수 조건하에서(EDTA 분해효율) 체류시간 15.9-88.9초의 범위의 EDTA 분해효율을 측정하였다. 이때 산화제로는 과산화수소($H_2O_2$)를 사용하였다. EDTA의 분해효율은 온도 및 산화제투입량의 증가에 따라 상승하였으며, 반응물 도입유속의 감소 즉, 체류시간의 증가에 따라서 상승하였다. 본 연구결과 온도 $500^{\circ}C$, 압력 250 bar, 산화제 투입량 400%의 조건에서 최대 99.6%의 분해효율을 나타내었다. 분해효율에 미치는 온도의 영향이 산화제 투입량 증가의 영향보다 컸으며, 5,000 mg/L의 EDTA($COD_{Cr}$로서 3,063 mg/L)의 99% 이상 분해효율은 온도 $500^{\circ}C$와 압력 250 bar의 초임계수 산화조건에서 산화제투입량 200% 이상 및 체류시간 40.1초 이상에서 얻을 수 있었다.

음악요법이 응급실 환자의 불안에 미치는 영향 (The Effect of Music Therapy on Anxiety of Patients in Emergency Room)

  • 이평화;서인선;정승희
    • 성인간호학회지
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    • 제20권3호
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    • pp.500-511
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    • 2008
  • Purpose: The purpose of this study was to examine the effects of music therapy on anxiety of patients in emergency room. Methods: The study was designed using a noneqivalent control group nonsynchronized design. For 20 minutes, the experimental group(22 patients) had listened to music and the control group(23 patients) had bed rest. A six-item state anxiety scale developed by Marteau and Bekker, which was based on Spielberger's State-Trait Anxiety Inventory, blood pressure and pulse rate were measured to all study participants before and after the intervention. The data was analyzed by the SPSS 12.0 program. Results: 1) The experimental group's state anxiety level were significantly lower than the control group's(t=2.220, p=.032). 2) There were no significant differences in both group's diastolic(t=-.495, p=.623) and systolic blood pressure(t=831, p=.411). 3) The experimental group's pulse rate was significantly lower than the control group's(t=2.363, p=.023). Conclusion: Music therapy may be applied as a nursing intervention to decrease anxiety in emergency room.

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국내 나노기술 정보 현황 및 수요에 관한 조사 연구 (Study on the present status of nanotechnology information resources and demand in Korea)

  • 소대섭;김경호;이호신;최붕기
    • 한국콘텐츠학회:학술대회논문집
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    • 한국콘텐츠학회 2004년도 추계 종합학술대회 논문집
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    • pp.531-537
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    • 2004
  • 본고는 국내 나노기술 분야의 정보자원 현황 및 향후 정보 수요에 대한 연구를 수행한 것으로서, 나노기술전문가 500여명을 대상으로 설문조사를 통하여 나노기술 정보자원 현황 조사, 나노기술 수집현황 조사, 나노기술 정보수요 조사 등을 실시하였고, 이를 기술 분야별, 콘텐츠 종류별로 분석 연구하였다. 또한 정보 이용자들의 정보 활용도 및 만족도를 연구하였다. 본 연구를 통해서 나노기술정보 활용 방안과 전문콘텐츠 제작을 위한 방향을 설정하고 나아가 나노기술 정보정책을 수립하는데 유용한 제안을 도출하고자 한다.

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감마선 조사된 토양에서 분리된 박테리아 Paenibacillus swuensis DY6T의 완전한 게놈 서열 (Complete genome sequence of Paenibacillus swuensis DY6T, a bacterium isolated from gamma-ray irradiated soil)

  • 김명겸;이승열;정희영;스리니바산 사티야라지
    • 미생물학회지
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    • 제52권4호
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    • pp.500-502
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    • 2016
  • 박테리아 종들은 정교한 효소 시스템의 존재로 인해 이온화 방사선 처리 후에 생존할 수 있는 것으로 보고되어 왔고 몇몇 내생 포자를 생산하는 박테리아 또한 두꺼운 포자껍질의 존재 때문에 방사선에 저항할 수 있다. 이 연구에서는 방사선이 조사된 토양의 시료에서 추출된 Paenibacillus swuensis $DY6^T$의 완전한 게놈 서열을 분석하였다. 이 게놈은 G+C 함량이 49.93%인 5,012,599 bp으로 구성되어 있고 단백질 정보를 암호화한 유전자 4,463개와 133개 RNA 유전자를 포함하고 있다.

Fe-25at%Al합금의 $DO_3{\rightleftharpoons}B2$ 천이온도, 미세조직 및 부식거동에 미치는 B, Si의 영향 (Effects of B and Si Additions on the $DO_3{\rightleftharpoons}B2$ Transition Temperature, Microstructure and Corrosion Behavior of Fe-25at%Al Alloys)

  • 최답천;황금연
    • 한국주조공학회지
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    • 제12권2호
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    • pp.131-138
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    • 1992
  • The effects of B additions, alone or in combination with Si, on the microstructure, $DO_3{\rightleftharpoons}B2$ transition temperature($T_c$) and corrosion behavior of Fe-25at%Al alloys were investigated. The raw materials were arc-melted in vacuum and then subjected to the following heat treatments to maximize the $DO_3$ order : homogenized at $1000^{\circ}C$ for 48hrs, slowly cooled to $500^{\circ}C$, and held at that temperature for 24hours. Results showed that the B addition to Fe-25at%Al alloys does indeed refine the grain and change from intergranular to transgranular fracture mode at room temperature, indicating a strengthening of grain boundaries. The Fe-25at% Al-1at% B-3at% Si alloy showed the highest $T_c$(${\Delta}T_c=150^{\circ}C$) in this work. However, the effectiveness of Si in raising $T_c$ decreased with more than 5at% Si additions combined with B. Since the preferential corrosion occurs at the precipitates, the corrosion resistance decreased due to the increased amount of precipitates with alloying additions.

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Contextual information 을 이용한 P파 검출에 관한 연구 (Improvement of ECG P wave Detection Performance Using CIR(Contextusl Information Rule-base) Algorithm)

  • 이지연;김익근
    • 대한의용생체공학회:의공학회지
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    • 제17권2호
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    • pp.235-240
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    • 1996
  • The automated ECG diagnostic systems that are odd in hospitals have low performance of P-wave detection when faced with some diseases such as conduction block. So, the purpose of this study was the improvement of detection performance in conduction block which is low in P-wave detection. The first procedure was removal of baseline drift by subtracting the median filtered signal of 0.4 second length from the original signal. Then the algorithm detected R peak and T end point and cancelled the QRS-T complex to get'p prototypes'. Next step was magnification of P prototypes with dispersion and detection of'p candidates'in the magnified signal, and then extraction of contextual information concerned with P-waves. For the last procedure, the CIR was applied to P candidates to confirm P-waves. The rule base consisted of three rules that discriminate and confirm P-waves. This algorithm was evaluated using 500 patient's raw data P-wave detection perFormance was in- creased 6.8% compared with the QRS-T complex cancellation method without application of the rule base.

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다기능 작업차를 위한 P.T.O 축 및 트랜스밋션의 최적설계 및 개발 (The Transmission Development with P.T.O Axle Design for Work Vehicle Including Multi-faculty)

  • 곽이구;김재열
    • 한국정밀공학회지
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    • 제25권4호
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    • pp.108-117
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    • 2008
  • A transmission designed with P.T.O(Power Take-Off) axle for agricultural work vehicles including multi-purpose vehicles has been developed. It is focused on the 4-wheel drive transmission of synchronous contact type for practical use in fruit tree households which is required for a large-sized agricultural vehicle. Concerning to the specification performed, the load capacity is from 500kg to 1,000kg and the safety should be secured for passengers. In addition, the driving condition should also be secured under bad situations of the topographic slope, swampy land and the rest. In order to carry out above tests, a prototype vehicle through strength analysis of transmission design has been manufactured. Consequently, optimal design conditions on the power transmission with multi-purpose vehicle for various jobs are proposed such as an indication of optimal RPM and torque at a certain work situation. The performance test through the prototype of multi-purpose work vehicle is performed and the related data base is achieved. Finally, it is improved on troubles by the analysis of the results of R&D and provided the solutions on problems occurring to mass production in the future.

신재생에너지 적용기술이 저탄소녹색도시건설에 미치는 영향연구 (Study for the Design of Zero-carbon City through the Application of Renewable Energies)

  • 박영규;김정인;김갑철
    • 신재생에너지
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    • 제6권4호
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    • pp.15-29
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    • 2010
  • In order to make the best choice for $CO_2$ abatement using renewable energy technologies, it is important to be able to adapt these technologies on the basis of their sustainability, which may include a variety of environmental indicators. This study examined the comparative sustainability of renewable technologies in terms of their life cycle $CO_2$ emissions and embodied energy, using life cycle analysis. The models developed were based on case studies of bioenergy pilot plant in P city of Kyungki province. Final results were total emission of $CO_2$ in Pocheonsi is 670,041 $tCO_2$, around 500,877 $tCO_2$ for electricity and for heat generation, and 169,164 $tCO_2$ for transportation. When used $1,984\;m^3$/day of waste (pig manure etc.) and operated CHP with wood chips of 144,664 ton/year, the $CO_2$ emission in P city was left as is an emission of 449,274 $tCO_2$ and an abatement of $CO_2$ in this region was increased by 32.9%.

托裏黃耆湯이 消炎 및 組織 再生에 미치는 影響 (Effect of Taklee Hwangki Tang Extract on Inflammation)

  • 강승원;노석선
    • 한방안이비인후피부과학회지
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    • 제6권1호
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    • pp.53-70
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    • 1993
  • These experiments were conducted to investigate the effect of Taklee Hwangki Tang(THT) on inflammation. THT extract did not affected on the leakage of evans blue into peritoneal cavity and mouse paw edema induced by histamine, but decreased the cottom pellet granuloma formation. Using proliferation of Balb/c 3T3 fibroblast cell line as an in vitro model of granulation tissue formation, the ability of THT to stumulate cellular proliferation of fibroblast cells was investigated. When the cells were seeded at $1{\times}10^4$ cells/well, balb/c 3T3 cells are reached to the late expponential phase at 3rd day. Under the conditions established above, THT increased the proliferation of Balb/c 3T3 cells at concentration of $10^-,\;10^{-6}\;and\;10^{-5}g/ml$. The treatment of $10^{-6}g/ml$ of THT did not influence onthe NDA syntesis and proteinsynthesis of the cells. The $10\%$ serum from THT treated mice(500mg/kg/day for 4 days) increased the proliferation of Balb/c 3T3 fibroblast markedly, but decreased the DNA synthesis and protein sythesis of the cells. The results suggest that THT may be of practical therapeutic use at the period of the last in. flammation.

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