The purpose of this study is to investigate the effect of long - term deterioration factor of 12 months on 6 kinds of coating waterproofing materials (polyurethane 1, 2, acrylic rubber, polyurea, rubber asphalt, cement - As a part of the study to characterize the performance change in material aspect, the research was carried out on the tensile strength of the polyurea coating waterproofing material against the performance change in the long term exposure to the chemical erosion environment. As shown in the test results, it was mainly performed in an acidic environment, and it can be confirmed that polyurea is not resistant to acid. In the alkali and sodium chloride environment, the tensile strength after immersion for the last 12 months showed a decrease in strength within about 10% of the initial tensile strength, and it was confirmed that the resistance was excellent in an alkali environment.

There are many cases where large areas of the underground parking lots of residential buildings do not have proper measures against prevention of leakage, resulting in condensation, growth of infectious microogranisms and increase of pollution in the air. This paper discusses a study conducted to understand the awareness of leakage problems and the damage that follows in the underground structures of residential buildings.

There are many cases where large areas of the underground parking lots of residential buildings do not have proper measures against prevention of leakage, resulting in condensation, growth of infectious microogranisms and increase of pollution in the air. This paper discusses a study conducted to understand the awareness of leakage problems and the damage that follows in the underground structures of residential buildings.

흰양삼, 황기, 감초, 구기자, 뽕나무잎, 갈근, 하고초, 오갈피,오미자, 황금, 산약, 황정, 작약, 생지를 1 : 0.7 : 0.4 : 0.7 : 0.4 :0.7 : 1.1 : 0.9 : 0.4 : 0.4 : 0.7 : 0.7 : 0.9 : 0.9의 비율로 함유한 한약재 조성물의 혈당 및 지질대사 개선효과를 제2형 당뇨동물 모델인 db/db 마우스에 있어서 조사하였다. In vitro에서 한약 재조성물 메탄올 추출물의 α-glucosidase 저해활성을 측정한 결과, 경구 혈당강하제로 사용중인 아카보스 (20.7%)에 비해 높은 저해활성 (25.2%)을 나타내었다. 4주령의 수컷 db/db 마우스 (C57BL/KsJ, n = 14)를 1주간의 적응기간이 지난 후 2군으로 나누어 대조군에게는 AIN-93G diet를 기본으로 한 basal diet를, 실험군에게는 동결건조된 한약재조성물 가루를 식이의 10% 수준으로 함유한 식이를 6주간 제공하였다. 한약 재조성물의 섭취는 실험동물의 체중 및 식이 섭취량에 유의적인 영향을 주지 않았으나 공복 혈당 (442.5 ± 36.0mg/dL)을 대조군 (489.8 ± 34.6mg/dL)에 비해 유의적으로 감소시켰다 (p 〈 0.05). 또한 한약재조성물 섭취군의 혈장 콜레스테롤 (159.2 ± 18.4mg/dL) 농도는 대조군 (185.4 ± 13.7mg/dL)에 비해 유의적으로 감소하였으며 (p 〈 0.05), 혈장 중성지방 농도는 한약재 조성물 섭취군 (99.4 ± 15.0mg/dL)이 대조군 (108.8 ±11.0mg/dL)에 비해 낮아지는 경향을 나타내었다. 따라서 한약 재조성물의 섭취는 당뇨동물모델에 있어서 혈당 및 혈장 콜레스테롤 농도를 감소시켜, 당뇨병 개선 및 당뇨합병증 예방에 기여할 것으로 사료된다.