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알칼리 정제(精製)와 에스테르화에 의한 미강유의 이화학적(理化學的) 특성(特性)의 비교(比較)
김현구,신동화,신효선,Kim, Hyun-Ku,Shin, Dong-Hwa,Shin, Hyo-Sun 한국식품과학회 1985 한국식품과학회지 Vol.17 No.3
알칼리 처리와 글리세린으로 에스테르화 반응을 시킨 탈산공정에 의하여 정제한 각 미강유의 이화학적 항수 및 지방질 조성을 비교하였다. 비중 및 굴절율은 글리세린처리미강유가 알칼리정제미강유보다 높았고, 색도는 글리세린처리미강유가 알칼리정제미강유보다 훨씬 진한 황색도를 나타내었으며, 발연점은 알칼리정제미강유가 글리세린처리미강유보다 60${\sim}80^{\circ}C$높았다. 유리지방산의 함량은 알칼리정제미강유(0.05%)보다 글리세린처리미강유(0.88${\sim}$1.36%)가 높았으며, 왁스는 알칼리정제미강유에서는 검출되지 않았으나 글리세린처리미강유에서는 soft wax가 0.600${\sim}$0.871%, hard wax가 0.035%${\sim}$0.486% 함유되어 있었다. 알칼리 정제미강유와 글리세린처리미강유의 중성지방질, 당지방질 및 인 지방질의 함량은 큰 차이가 없었다. 중성지방질중의 TG 함량은 알칼리정제미강유(96.3%)가 글리세린처리미강유(93.0${\sim}$94.1%)보다 많았으며 MG함량은 알칼리정제미강유(0.11%)가 글리세린처리미강유(0.39${\sim}$0.69%)보다 낮았다. 알칼리 정제미강유와 글리세린처리미강유의 주요지방산은 올레산, 리놀레산, 팔미트산 이었으며 처리방법에 따라 큰 차이가 없었다. The alkali refined rice bran oil (ARBO) and the esterified rice bran oil (ERBO) with glycerol were analyzed for their physicochemical charateristics and the compositions. Specific gravity, refractive index and yellowness of ERBO was higher than ARBO but smoking point was 60-$80^{\circ}C$ higher than ERBO. The free fatty acid content was 0.05% a ARBO and 0.88-1.36% ERBO. The wax was not detected in ARBO but the soft and hard waxes were detected in ERBO. The lipids were composed of 98-99% neutral lipid, 0.2-0.5% glycolipid and 0.1-0.5% of phospholipid in all samples. The triglyceride content of neutral lipid was 96.3% ARBO and 93.0-94.1% ERBO, and its monoglyceride content was 0.11% ARBO and 0.39-0.69% ERBO. The major fatty acid composition of samples were 41-42% oleic, 36-40% linoleic and 17-18% of palmitic acid.
전력통계정보시스템(EPSIS) 풍력발전자료에 의한 국내 풍력발전 현황 및 이용률 분석
김현구,강용혁,김창기 한국풍력에너지학회 2017 풍력에너지저널 Vol.8 No.2
This paper reviews the history and status of wind energy in South Korea using the wind power generationstatistics (2002∼2016) provided by the Electric Power Statistics Information System (EPSIS) and “2015Renewable Energy Supply Statistics” from the Ministry of Trade, Industry, and Energy. In addition, theprediction accuracy of the Korea wind resource map made by the Korea Institute of Energy Research (KIER)was evaluated through correlation analysis of capacity factor by province between EPSIS and KIER. Theaverage capacity factor of wind energy in South Korea is 23 %, which is in the middle class among the IEAWind member countries. The monthly capacity factors of EPSIS and KIER showed a high correlation ofR2=0.78. It was clearly reaffirmed that the wind energy supply is directly linked to the government’s supportpolicy. Therefore, in order to achieve the goal of 20 % renewable energy supply by 2030, establishing effectivegovernment policies is a matter of urgency to maximize the market share of domestic wind turbines and to solveconflicts related to environmental regulations and public acceptance.