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레토르트식품, 분유, 비스킷 및 피자 내에 함유되어 있는 트랜스지방산 함량 분석
박다정,박정민,신진호,송재철,김진만,Park, Da-Jung,Park, Jung-Min,Shin, Jin-Ho,Song, Jae-Cheol,Kim, Jin-Man 한국축산식품학회 2008 한국축산식품학회지 Vol.28 No.2
The consumption of foods containing trans fatty acids (TFAs) is a matter of concern at present. According to many studies, trans fatty acids (TFAs) may cause illnesses such as the coronary heart disease, diabetes mellitus, large intestine cancer, and breast cancer. They can also raise low density lipoprotein (LDL) cholesterol and reduce high density lipoprotein (HDL) cholesterol. TFAs can also inhibit the synthesis of phospholipids containing polyunsaturated fatty acids in arterial cells. As a consequence the Food and Drug Administration has deemed that saturated fatty acid, cholesterol and trans fatty acid levels be listed on food labels as of 2006. The Korea Food and Drug Administration also has required the listing of trans fatty acid content on food labels since 2007. The aim of this study was to determine the total lipid and trans fatty acid (TFA) contents in retort food, powdered milk, biscuit and pizza products. The number of samples examined were 2 retort food, 6 powdered milk, 7 biscuit and 3 pizza products. The extraction of total lipids in retort food and powdered milk followed the chloroform methanol method. The extraction of total lipids in biscuit and pizza was by the acid digestion method. All samples were analyzed by gas chromatography (GC) using a SP-2560 capillary column and a flame ionization detector. The TFA contents per 100g of sample were 1-2.8% (1.9%) in retort foods, 0.4-2.4% (1.37%) in powdered milk products, 0-2.9% (1.23%) in biscuits, and 2.8-3.45% (3.03%) in pizzas.
박다정(Park, Dajung),이상민(Lee, Sangmin) 호서사학회 2020 역사와 담론 Vol.0 No.93
1945년 2월 11일, 美國·英國·蘇聯은 소련의 對日 참전과 그 대가에 관한 “얄타비밀협정(이하“얄타협정”)”을 체결하였다. 얄타협정에 관한 기존의 평가는 얄타협정을 미국과 소련이 상대의 세력 확장을 봉쇄하고자 한 결과로 인식하였으며, 반면에 美·蘇 양국이 협력관계를 유지하고자 했던 측면에 대해서는 간과하고 있다. 본 연구는 1941년 12월 태평양전쟁이 발발한 이후부터 1945년 8월 소련의 대일전 참전이 이루어진 시점까지의 미·소 협력관계를 분석하였다. 이를 통해 미·소 양국은 전시뿐만 아니라 전후에도 극동지역에서 협력을 유지하는 것이 각자 자국의 이익에 부합한다고 판단하였음을 밝혔다. 특히 戰時 양국관계는 기본적으로 “협력”이라는 큰 패러다임(paradigm) 속에서 분석되어야 하며, 얄타협정은 미·소 대립이 아닌 “妥協의 산물”이었음을 규명하고자 한다. 얄타협정은 1945년 8월 “中蘇友好同盟條約”의 체결을 통해 최종적으로 완성·실행되었으며, 이로써 전후 미·소 양국의 동북아시아 국제질서에 대한 설계도가 완성되었다. On February 11, 1945, U.S. President Franklin D. Roosevelt, British Prime Minister Winston Churchill, and Soviet Premier Joseph Stalin signed the Yalta Agreement, which regulated the conditions in return for entering of the Soviet Union in the Pacific War. Previous studies on the Yalta agreement mainly evaluated it as a result of the U.S. and Soviet Union”s containment of the other”s expansion in the Far East, while overlooking these two countries” efforts for cooperation. By analysing the U.S.–Soviet cooperation during the period from the outbreak of the Pacific War in December 1941 until the Soviet Union”s participation in the war against Japan in August 1945, this article concluded that U.S. and Soviet Union maintained cooperation in the Far East, not only during wartime but also postwar period, on the belief that it was in their own interests. In conclusion, wartime relationship between two countries should be analyzed in a concepts of cooperation, therefore, the Yalta Agreement should be regarded as a “product of dialogue and negotiations” between the Soviet Union and the U.S., not a result of the confrontation. The Yalta Agreement was finally accomplished by signing the Sino-Soviet Treaty of Friendship and Alliance in August 1945. The Yalta Agreement and Sino-Soviet Treaty laid the foundation for the postwar order in Northeast Asia.
열산화법으로 생성된 TiO₂ 중간보호층이 Ti/RuO₂-PdO-TiO₂ 전극의 염소발생 효율 및 내구성에 미치는 영향
박다정(Da Jung Park),최승목(Sung Mook Choi),이규환(Kyu Hwan Lee) 한국표면공학회 2018 한국표면공학회지 Vol.51 No.4
Not only efficiency of chlorine evolution reaction (CER) but also durability namely service life is very important property in dimensional stable anode for Ballast Water Management System (BWMS) for marine ships. Many researchers have been focused on improving efficiency of CER by controlling composition, phase and surface area for a long time, but the efforts to increase durability was relatively small. In this study, we have investigated the effect of TiO₂ protective interlayers on efficiency and durability of DSA electrodes. TiO₂ protective interlayers were prepared by thermal oxidation at 500, 600 and 700℃ on Ti substrate. And then the DSA electrodes consisting of Ti/RuO₂-PdO-TiO₂ were prepared by thermal decomposition method on TiO₂ interlayers. The efficiencies of CER of DSA electrodes without TiO₂ interlayer and with TiO₂ interlayer grown at 500, 600 and 700℃ were 94.19, 94.45, 84.60 and 76.75% respectively. On the otherhand, durabilities were 30, 55, 90 and 65 hours respectively. In terms of industrial aspect, the performance of DSA is considered high efficiency and durability which can correspond to total production of chlorine. If we considered the performance index of DSA as the product of efficiency and durability, performance indices could be recalculated as 28.26, 50.85, 76.14 and 49.89 respectively. As the thermal oxidation temperature increasing, life time were increased remarkerbly, while efficiency of CER was decreased slightly. As a result, DSA electrode with TiO₂ interlayer grown at 600oC has shown about 2.7 times performace of original DSA electrode without TiO₂ interlayer.