• KIEAE Journal
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• 제13권3호
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• pp.71-78
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• 2013

A need for building energy efficiency is on the issue since energy demand in the building stock in Korea represents about 24% of the final energy consumption. As a way of improving the thermal performance of buildings for reducing maintenance costs and environmental conservation, a lot of effort is shown to improve the building energy efficiency by applying improvement of envelope insulation performance for buildings whose energy efficiency is low relatively through the remodeling. The windows of building envelopes are areas that lead to the biggest heat loss in the building. So windows are considered to be the primary target of energy efficiency in remodeling and various studies for windows have been done. Currently, however, only U-factor and airtightness of windows performance are regulated. Window wall ratio(WWR) and solar heat gain coefficient(SHGC) of windows are not considered when conducting the remodeling. In this study appropriate performance of windows(U-factor and SHGC) for existing residential is proposed according to the window wall ratio by using EnergyPlus. As the results of this study, the U-factor of windows representing the maximum energy savings is $1.0W/m^2K$ but in case of SHGC, the values that indicate the maximum energy savings are different depending on the window wall ratio. Therefore, when conducting the remodeling of windows, to determine energy efficiency by considering only the U-factor is inadequate so it is necessary that appropriate windows are applied to buildings by considering window wall ratio and windows properties(U-factor and SHGC).

• 동아시아식생활학회지
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• 제19권4호
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• pp.558-563
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• 2009

무의 유방암 및 폐암 세포주에 대한 증식 저해 활성을 분석하였고, 항암 관련 지표 물질로 알려진 glucosinolate의 함량 및 sulforaphane의 함량을 조사하였다. 유방암 세포주의 하나인 MCF-7 세포주를 이용한 CCK(cell counting kit) assay분석법을 사용하여 재래종 무와 갯무 추출물의 세포 증식 저해율을 조사한 결과, 재래종 무보다 갯무의 세포 증식 저해율이 높았으며, sulforaphane 함량에서도 갯무가 재래종 무보다 높은 것으로 나타났다. 폐암 세포주의 하나인 A-549 세포주를 이용한 세포 증식 저해율을 조사한 결과, 갯무가 재래종 무보다 높은 세포 증식 저해율을 보였으며, 총 glucosinolate함량에서도 갯무가 재래종 무보다 높은 것으로 나타났다. 본 연구를 통하여 갯무를 이용하여 재래종 무의 품질 특성을 개량할 수 있는 가능성을 제시하였다.