http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 곽대근 (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
-
김선정,곽대근 大田産業大學校 2002 한밭대학교 논문집 Vol.19 No.-
Recently, local or global trends show that vehicle tunnels are getting longer. And demand for longitudinal ventilation system with jet-fans in road tunnels has also increased. Therefore, this study aims at studying on the ventilation system with jet-fans in longer highway tunnels. Jet-fan system is very economic ventilation system. So many jet fans are installed in road tunnel. It is advantageous about the cost of equipment, energy saving, maintenance, the volume of traffic. Application of the existing tunnel is possible and suitable to the condition of the domestic method.
-
제병권,김도연,이정일,백신,곽대근 한국연초학회 2003 한국연초학회지 Vol.25 No.2
The majority of ι-menthol is still obtained by freezing the oil of Mentha arvensis to crystallize the menthol present. This 'natural' menthol is then physically seperated by centrifuging the supernatant liquid away from the menthol crystal. But the price of natural ι-menthol has fluctuated widely so effort has been devoted to the production of ι-menthol by synthetic more readily available raw materials. In the 1970's, many researcher synthesised a new compounds with the menthol cooling effect. During this period many molecular structure designed and synthesised on concepts of correlation between structure and biological activity and the various types of molecule which give rise to cooling effect more than ι-menthol. Specially, N-alkyl-carboxamide group is substituted for the hydroxyl group in ι-menthol. Recently, the most active compounds synthesised is 4-methyl-3-(1-pyrrolidinyl)-2-[5H]-furanone. This compound is 35 times more powerful in the mouth and 512 times more powerful on the skin than ι-menthol. The cooling effect also lasts twice as long. While not yet commercially available, it is expected that these types of materials will be subjected to toxicological studies and will soon be sell on the market.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
