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저발열 결합재 및 CGS를 잔골재로 치환한 매스콘크리트의 수화열 해석
한준희 ( Han Jun-hui ),임군수 ( Lim Gun-su ),최일경 ( Chi Il-kyeung ),윤치환 ( Yoon Chee-whan ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.1
This study evaluated temperature distribution through adiabatic temperature rising test and hydration heat Analysis as a performance verification to utilize CGS as a hydration heat reduction material for mass concrete when replacing it with fine aggregate. According to the analysis, the temperature difference between the center and the surface was the highest at about 30℃, followed by the CGS 50% at 26℃ and the low heat combiner FA 30% at 23℃.
N - [ 1 - ( benzotriazol - 1 - yl ) alkyl ] aniline 유도체의 결정구조와 항균활성
성낙도(Nack Do Sung),임치환(Chi Whan Lim),이경준(Kyeong Joon Yi) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.4
New ten N-[1-(benzotriazol-1-yl)alkyl]aniline(4) derivatives were synthesized and the crystal structure of 4h was shown by X-ray crystallography and the absolute configuration has been assigned as S form. The molecule crystallizes in the monoclinic system, space group P2₁/n. And the molecules in the crystal are linked with each other through the hydrogen bond (N_(11)-H_(11)…N₃) with distance 2.300(11)Å. The fungicidal activity(pI_(50)) in-vitro against Botrytis cineria (BC), Phytophthora casici (PC) and Sclerotium cepinorum (SC) were determined by the agar dilution method. The structure activity relationships (SAR) between structure of 4 and the adivty were studied using a physicrochemical parameters of substituents and multiple regression technique. Amonf; these compounds, only the bromo group substituent(4f) showed higher activity, which depend on the hydrophobicity(π) of substituents. The relative orders of the activity are SC$gt;BC$gt; and PC, respectively. This implies that the activity is affected by the hydrophobic(π) nature of the Z group rather than the X group. Linear free energy relationships(LFER) on the fungicidal activity with substituents has been also discussed.
후윈야오 ( Hu Yun-yao ),한수환 ( Han Soo-hwan ),임군수 ( Lim Gun-su ),한준희 ( Han Jun-hui ),윤치환 ( Yoon Chi-whan ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.1
In this study, the classification, particle size, physical properties, and harmful substance contents of aggregates were compared in the standards between Korea and China. As a result of the analysis, although Korea and China are geographically adjacent from a global perspective, there are many differences in standards. In other words, it is analyzed that the standard was set due to the influence of the United States and Japan in Korea, while the standard was set due to the influence of Europe and Russia in China.