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심규대(Shim, Kyu Dae),김창용(Kim, Chang Ryong),정준연(Choung, Joon Yeon),김동균(Kim, Dong Kyun) 대한토목학회 2021 대한토목학회논문집 Vol.41 No.5
본 연구에서는 서해에 위치한 대산산업단지 해수담수화 시설에 필요한 전력비를 계산하고, 해수온도 및 염분도 변화에 따른 안전도를 고려한 전력비 기준을 산정하였다. 입력 자료(온도 및 염분도)는 국가해양환경정보통합시스템(MEIS, Marine Environment Information System) 22년 자료(1997~2018년)를 이용하고, 해수공정에서 사용되는 전력량은 RO막 제조사에서 제공되는 프로그램(Q-Plus v3.0)을 활용하였다. 금회연구에서는 해수담수화 시설물 설계시 합리적인 전력비 운영 가이드라인을 제시했다는데 의의가 있다. 해수담수화 역삼투압 공정은 약2.10~2.90 kWh/m³의 전력비가 소요되며, 에너지 안전도 95 % 기준으로 2.80 kWh/m³의 전력비가 해수담수화 시설을 운영할 때 고려되어야 하는 것으로 검토되었다. This study focused on safety aspects surrounding energy consumption in the seawater desalination process in the Daesan Industrial Complex located on the West Sea coast. The safety index for energy consumption was evaluated under different salinities and temperatures of the incoming seawater. Temperature and salinity input data for the 1997-2018 period were obtained from the Marine Environment Information System, and the power required for reverse osmosis (RO) was applied to the program as per the data provided by the RO membrane manufacturer (Q-Plus v3.0). Notably, reasonable energy consumption guidelines were proposed during the design of the desalination facilities; in this regard, the desalination process required approximately 2.10-2.90 kWh/㎥ electrical power. Moreover, the energy safety based on 95 % was estimated to be 2.80 kWh/㎥ when the desalination facility was operated.
야콘 추출물이 Streptozotocin으로 유도된 당뇨 동물모델에서 혈당강하에 미치는 효과
오홍근(Hong-Geun Oh),강영례(Young-Rye Kang),김정훈(Jung-Hoon Kim),문대인(Dea-In Moon),서민영(Min-Young Seo),박상훈(Sang-Hoon Park),최광호(Kwang-Ho Choi),김창용(Chang-Ryong Kim),김상현(Sang-Hyun Kim),오지현(Ji-Hyun Oh),김선영(Sun-Youn 한국식품영양과학회 2012 한국식품영양과학회지 Vol.41 No.6
This study was performed to investigate improvements in diabetes mellitus by extracts of yacon in streptozotocin (STZ)-induced diabetic rats. Fifty rats were divided into a normal group and four experimental groups. STZ (45 ㎎/㎏) was injected intraperitoneally to induce type I diabetes in the four experimental groups. Yacon extracts were administered for 5 weeks. Forty-five ICR mice were also divided into one positive control group and four experimental groups for the oral glucose tolerance test (OGTT) after fed yacon extract. The control group did not eat any yacon extracts, while Group 1 (GI) was fed 125 ㎎/㎏ of yacon extracts, Group 2 (GII) was fed 250 ㎎/㎏ of yacon extracts, and Group 3 (GIII) was fed 500 ㎎/㎏ of yacon extracts. After treatment for 5 weeks, blood glucose in GIII group showed decreased tendency at the 5 week. In OGTT by glucose, the glucose level of yacon treatment group in diabetic rats was significantly decreased compared to the glucose level of the control group, but there was no difference in OGTT by maltose. In ICR mice, the glucose level of the experimental group in OGTT by maltose was significantly decreased compared to the control group. The area of the islets of Langerhans was increased by yacon treatment in a dose-dependent manner on diabetic rats. Insulin concentration of the GIII group was also decreased compared to the control group, while the concentration of fructosamine, total cholesterol, and triglycerides in serum showed no difference. OGTT by glucose or maltose in ICR mice or diabetic rats, area of the Islets of Langerhans, and insulin concentration improved. Yacon treatment may be a useful therapeutic and preventive strategy for diabetes mellitus.
신명철,최형섭,최주,문만,김창용,이선홍 대한금속재료학회(대한금속학회) 1976 대한금속·재료학회지 Vol.14 No.1
特殊鋼의 性質을 改善하기 위한 일렉트로슬랙 再熔解法(ESR)을 開發하기 위하여 本硏究를 遂行하였다. 本硏究陳은 잉코트 容量 20 ㎏의 ESR 爐를 製作하였고, 1974年 11月 6日 試驗操業에 成功하였다. 그동안 이 爐를 써서 稼動條件을 달리 하여 S 45C, SCM 5 및 SUP 9을 熔解하였으며, 얻은 結果는 다음과 같다. 1) 電極-鑄型 直徑의 比가 클수록 熔解速度는 크고, 比電力消費量은 減少하였다. 2) 原來의 電極에 含有된 硫黃의 약 80%가 再熔解에 의하여 除去되었다. 3) 硫化物은 勿論, 酸化物과 같은 非金屬介在物도 大幅 除去되었다. 4) CaF₂-Al₂O₃系 슬랙에 있어서 Al₂O₃의 一部를 CaO로 代替하면 非金屬介在物을 줄이는데 더욱 效果가 있었다. 5) 再熔解된 잉고트는 健全하고 均一한 構造를 가졌으며, 또한 鋼의 靭性(toughness)을 크게 改善시켰다. The study has been carried out on the electroslag remelting process(ESR) for the production of the high quality specialty steel. We constructed the ESR furnace of capacity 20 ㎏ ingot. Employing the furnace, several kinds of specialty steels such as S 45 C, SCM 5 and SUP 9 were remelted under different conditions for obtaining fundamental data. The results are; 1) The melting speed is proportional to the fill ratio, whereas the specific power consumption is inversely to it. 2) Nearly 80% of the sulphur content can be removed from the original electrode through the process. 3) The process is very efficient in removing non-metallic inclusions such as oxides as well as sulphides. 4) The slag in which calcium oxide being partly substituted for the slag of fluorspar and alumina is more effective in removing non-metallic inclusions. 5) The remelted ingot has sound homogeneous structure, exhibiting the improvement in ductility.