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국내 발전소별 바텀애시를 잔골재 대체재로 사용한 모르터의 특성에 대한 실험적 연구
송민섭,장재봉,조봉석,김재환,김용로,김무한 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
With the advance in industrial development and modern living comfort, the demand for electricity throughout the country is ever increasing. Also the annual consumption of coal by coal-fired power plants is increasing. The amount of ash produced in 2000 is estimated to be about 4.5 million tons. The disposal of this huge amount of ash introduces serious environmental problems. Fly ash among the ash produced is used in building industries as a substitute to cement in concrete and the concrete thus produced is said to be lighter and stronger. But bottom ash among the ash produced is not used because of its poor properties. But encouraging the use of bottom ash as a construction material is a sensible method of utilization as it avoids the problems and costs associated with disposal and provides an alternative aggregate source. This study is aimed at using bottom ash as an alternative fine aggregate source to provide a solution to disposal and insufficient fine aggregate for the production of concrete. So properties of bottom ash produced in power plants were estimated due to the difference of bottom ash produced in each plant. And mortar strength was estimated as basic data to use bottom ash in building industries.
태양의 입사각에 따른 일사강도와 PV 시스템의 발전량 데이터 분석에 관한 연구
이봉섭(Bong-Seob Lee),곽동걸(Dong-Kurl Kwak),송현직(Hyun-Jik Song),황계호(Gye-Ho Hwang) 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.5
The energy of the solar radiation emitted from the Sun to the Earth is different in every season. The intensity of solar radiation depends on weather conditions and the angle of incidence and azimuth, the intensity of solar radiation can also affect solar power generation. In this paper, we are considering the inclination of the PV array installed the pyrometer, recently measured the irradiance of 1 year and analyzed the data. As a result, the inclination angle 30 is the highest. And, we analyzed the monthly trend of power generation quantity from PV systems installed, when designing the PV system, demonstrated that the inclination angle of the array is suitable.
Flavobacterium sp. Strain DS5에 의한 Oleic Acid로부터 산화불포화 지방산의 생산 및 분석
송병섭(Byung-Seob Song),한남수(Nam Soo Han),이봉희(Bong Hee Lee),Ching T. Hou,김범수(Beom Soo Kim) 한국생물공학회 2009 KSBB Journal Vol.24 No.1
식물성 오일은 다양한 생물제품 생산에 적합한 저가의 원료이다. 식물성 오일의 주성분인 oleic acid와 linoleic acid와 같은 불포화 지방산의 함량은 콩기름의 경우 각각 22%와 55%, 옥수수기름의 경우 26%와 60%, 유채기름의 경우 61%와 21%에 달한다. Hydroxy나 keto group으로 치환된 불포화 지방산들은 다른 지방산에 비해 높은 점도와 반응성 등의 특별한 화학적 특성 때문에 가소제, 계면활성제, 윤활유, 세제 등에 사용되는 유용한 산업 화합물이다. 본 연구에서는 Flavobacterium sp. strain DS5 (NRRL B-14859)를 oleic acid로부터 중간생성물로서 10-hydroxystearic acid (10-HSA)를 거쳐 10-ketostearic acid (10-KSA)로의 전환에 이용하였다. 두 개의 생물전환 생성물인 10-KSA와 10-HSA는 GC, GC-MS, 1H-NMR, 13C-NMR을 이용하여 정량 및 정성분석을 수행하였다. 플라스크 배양에서 10-KSA 와 10-HSA의 최대 생산량은 각각 3.4 g/L와 0.5 g/L 이었다. 10-KSA 생산을 위한 최적 glucose 농도, yeast extract 농도, oleic acid 첨가시간, 첨가부피는 각각 20 g/L 이하, 5 g/L 이상, 접종 후 18 h, 0.3 ml/50 ml 이었다. Vegetable oils are desirable inexpensive feedstocks for various bioproducts. The content of unsaturated fatty acids such as oleic and linoleic acids are 22% and 55% for soybean oil, 26% and 60% for corn oil, and 61% and 21% for canola oil, respectively. Keto and hydroxy fatty acids are useful industrial chemicals, used in plasticizer, surfactant, lubricant and detergent formulations because of their special chemical properties such as higher viscosity and reactivity compared with other fatty acids. In this study, a microbial isolate, Flavobacterium sp. strain DS5 (NRRL B-14859), was used to convert oleic acid to 10-ketostearic acid (10-KSA) via 10-hydroxystearic acid (10-HSA). Two bioconversion products, 10-KSA and 10-HSA, were quantitatively and qualitatively analyzed using gas chromatography, gas chromatography-mass spectrometry, and 1H- and 13C-nuclear magnetic resonance. The maximum production of 10-KSA and 10-HSA in flask cultures were 3.4 g/L and 0.5 g/L, respectively. The optimum concentrations of glucose and yeast extract, addition time and volume of oleic acid for 10-KSA production were less than 20 g/L, more than 5 g/L, 18 h and 0.3 ml/50 ml, respectively.