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CBS-dust 치환에 따른 고로슬래그 다량치환 시멘트 벽돌 품질에 미치는 영향
한준희 ( Han¸ Jun-hui ),한수환 ( Han¸ Soo-hwan ),김수호 ( Kim¸ Su-hoo ),윤치환 ( Yoon¸ Chi-whan ),한민철 ( Han¸ Min-cheol ),한천구 ( Han¸ Cheon-goo ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2
This study examines the performance of CBS-Dust for the utilization of cement bricks as alkali stimulants for furnace slag replacement binders. It converts the CBS-Dust substitution rate and the excess slag substitution rate. According to the analysis, when replacing CBS-Dust with 65~70 % of BS substitution rate and 7.5~10 % of CBS-Dust, it shows excellent performance as an alkali stimulant of BS' potential hydrophobic reaction, and it is expected to be effective for secondary products of BS replaced in large quantities.
CGS 치환유무 및 시멘트 종류 변화에 따른 콘크리트의 물리적 특성
김수호(Kim, Su Hoo),후 윈 야 오(Hu, Yun Yao),한준희(Han, Jun Hui),윤치환(Yoon, Chee Hwan),한민철(Han, Min Cheol),한천구(Han, Cheon Goo) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
본 연구에서는 CGS를 잔골재로 치환하여 프리믹스 시멘트 종류 변화에 따른 콘크리트의 물리적인 특성을 확인하고자 하였다. 분석결과 CGS를 치환함에 따라 고성능 감수제 사용량이 감소하고 AE제 사용량은 증가하였다. CGS는 압축강도에 큰 영향을 미치지 않음을 확인할 수 있었다. In this study, Coal gasification slag(CGS) was replaced with fine aggregate to verify the physical properties of the concrete according to the change in cement type. As a result of the study, the use of CGS resulted in a decrease of superplasticizer and an decrease of AE agent. CGS did npt affect the compressive strength remarkably.
NS를 기반으로 한 중국 전통복식 예술의 디지털 커뮤니티에 관한 연구
치환 동북아시아문화학회 2023 동북아 문화연구 Vol.1 No.76
With the rapid development of social media, Chinese traditional clothing art faces problems such as weakening of cultural identity, information overload and content distortion in the process of digital communication. This article uses the CART-US theoretical model, through in-depth interviews and theme analysis, to collect data through in-depth interviews with 20 experts, scholars and business practitioners in the National Art Fund project, and adopts the theme analysis method to explore the influencing factors and analyze the relationship between various elements. Relationship. The study found that social media provides a new path for the digital dissemination of traditional Chinese costume art, but there are also challenges. Therefore, this paper proposes communication strategies and measures for social media platforms. Including optimizing content presentation to improve the readability and attractiveness of information; strengthening user interaction to promote communication and dissemination among users; and cultivating a sense of cultural identity so that users can more cherish and inherit Chinese traditional clothing art. These measures help to improve the dissemination effect of Chinese traditional costume art on social media platforms, thereby enhancing its influence at home and abroad. This study provides useful reference and reference for research in related fields through an in-depth analysis of the status quo and challenges of disseminating Chinese traditional costume art on social media platforms. At the same time, the research results have important theoretical guidance and practical significance for government departments, enterprises and individuals to better disseminate and promote Chinese traditional costume art on social media.
새로운 抗菌劑로서 1-(phenoxymethyl)benzotriazole 誘導體의 合成과 定量的 構造活性關係(QSAR) 分析
成洛道,林治煥,崔宇永,高東成,權奇星 충남대학교부설 생명공학연구소 1992 생물공학연구지 Vol.2 No.-
14종의 새로 합성된 1-(phenoxymethyl)benzotriazole(Ⅰ)(Y=0)과 1-(thiophenoxymethyl)benzotriazole (Ⅱ)(Y=S) 및 1-(azidomethy) benzotriazole(Ⅲ) 유도체의 구조와 in vitro에서 Pyricularia oryzae, Fusarium oxysporum f. sp. sesami, Valsa ceratosperma 및 Botrytis cinerea에 대한 균사 생장을 50% 저해하는 활성(pI_50)사이의 구조-항균활성 상관관계들을 QSAR방법으로 연구하였다. (Ⅰ)의 항균활성은 (Ⅱ)와 (Ⅲ)보다 우세하였으며 phenoxy group(Ⅰ)의 치환기 효과는 수소 결합성 (HB)과 포물선 관계의 electronic effect(σ), steric effect(B_1) 그리고 hydrophobic effect(π)로 설명된다. P. oryzae와 F. axysporum f. sp. sesami의 항균 활성에 대한 치환기의 적정값은 B_1=1.40A, (H)와 σ=0.07∼0.15, (H)이고 V. ceratosperma와 B. cinerea에 대하여는 각각 σ=0.23∼0.28, (C1)과 π=0.70, (C1)이었으며 가장 효과적인 화합물인 (Ia)와 (Id)의 구조-활성관계가 검토되었다 (1990년 5월 11일 접수, 1990년 9월 20일 수리). The structure-antifungal activity correlations between the structure of fourteen new 1-(phenoxymethyl)benzotriazoles (Ⅰ) (Y=0), 1-(thiophenoxymethyl)benzotriazoles (Ⅱ) (Y=S) and 1-(azidomethy)benzotriazole (Ⅲ) derivatives were synthesized, and their activity, fifty percent inhibition of mycelial growth(pI_50), in vitro against Pyricularia oryzae, Fusarium oxysporum f. sp sesami, Valsa ceratosperma and Botrytis cinerea were investigated using a generalized QSAR method. The activity of (Ⅰ) was superior to those of (Ⅱ) and (Ⅲ). The effect of the substituents (Ⅹ) on the phenoxy group (Ⅰ) was rationalized by a parabolic function of electronic (σ), steric (B_1) and hydrophobic parameter(π), and hydrogen bonding (HB). Where the optimal values of substituent on the fungicidal activity againt P. oryzae and F. axysporum f. sp. sesami are B_1=1.40A ; (H) and σ=0.07∼0.15;(H), and those of substituent on the fungicidal activity against V. ceratosperma and B. cinerea are σ=0.23∼0.28; (Cl), π=0.70; (C1), respectively. The most effective compound (Ⅰa) and (Ⅰd) were examined in this study.
CGS 치환율 및 프리믹스 시멘트 종류에 따른 콘크리트의 응결시간 특성
김수호(Kim, Su-Hoo),후윈야오(Hu, Yun-Yao),임군수(Lim, Gun-Su),윤치환(Yoon, Chee-Hwan),김종(Kim, Jong),한민철(Han, Min-Cheol) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
In this study, compressive strength and setting time properties of concrete depending on the presence or absence of premix cement and CGS were analyzed as part of a study on the development of hydration heat reduction method through upper and lower mixing of mass concrete. As a result, the upper mix is the best in the two levels of premix-type cement ESC and SESC, and the lower mix is considered the most effective to apply TBC and CGS replacement concrete.
염소집진장치 부산물을 사용한 고로슬래그 다량 치환 시멘트 벽돌의 특성
후윈야오(Hu, Yun Yao),한수환(Han, Soo Hwan),윤치환(Yoon, Chi Whan),한민철(Han, Min Cheol),한천구(Han, Cheon Goo) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
This study examines the performance of CBS-Dust for the utilization of cement bricks as alkali stimulants for furnace slag replacement binders. It converts the CBS-Dust substitution rate and the excess slag substitution rate. According to the analysis, when replacing CBS-Dust with 65~70 % of BS substitution rate and 7.5~10 % of CBS-Dust, it shows excellent performance as an alkali stimulant of BS’ potential hydrophobic reaction, and it is expected to be effective for secondary products of BS replaced in large quantities.
Benzotriazole 계 유도체의 제초활성과 분자설계
박승희,박현주,임치환,성낙도 한국농화학회 1991 Applied Biological Chemistry (Appl Biol Chem) Vol.34 No.2
Benzotriazole계 유도체들의 정량적인 구조에 따른 벼(Oryzae sativa L., OS) 및 갈피 (Echinochloa crusgalli., EC)에 대한 생장 저해 활성 값(pI_50)과 치환기(X)의 physicochemical parameters로부터 정량적 구조 활성 관계(QSAR)를 검토한 바, 자유라디칼 파라미터(ER)가 매우 중요한 생장 저해 활성의 요인이었다. 일반적으로 생장 저해 활성은 (4, Y=0) 보다 (3, Y=S)이 컸으며 분자설계 결과, EC에 대한 생장 저해 활성은 치환기(X)가 센 전자 끌게(4-NO₂)이고 적정값 (ER=0.52(Y=0)와 0.15(Y=S)을 만족하는 경우에 가장 컸으며 이 사실로부터 benzotriazole계 유도체의 생장 저해 활성은 광합성 반응(PS-II)에서 전자전달을 효과적으로 차단하는 결과에 따른 것으로 판단된다.
FA시멘트 및 CGS 치환율에 따른 콘크리트의 단열온도상승 특성
백성진 ( Baek Sung-jin ),후윈야오 ( Hu Yun-yao ),김수호 ( Kim Su-Hoo ),한준희 ( Han Jun-hui ),윤치환 ( Yoon Chee Whan ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.1
In this study, adiabatic temperature rise of concrete depending on binder compositions and CGS contents is studied to provide informations for CGS low-heating aggregate and mixture designs for upper and lower placement lifts. Test nresults indicate that it is desirable to apply the combination of binders between top and bottom lift. For top lift, SESC or ESC is recommended, and for bottom lift, FAC+CGS 50 % is good for material composition.
성낙도(Nack-Do Sung),임치환(Chi-Whan Lim),윤기섭(Ki-Seob Yun),송종환(Chong-Whan Song),김형래(Hung-Rae Kim) 한국농약과학회 2000 농약과학회지 Vol.4 No.2
A series of synthesized N-(2-fluoro-4-chloro-5-alkyloxyphenyl)-3,4-dimethyl-2-arylthio-5-oxo-2,5-dihydropyrrole derivatives as substrates were found to selectivity significantly with both rice plant (Oryzasativa L.) and weeds, barnyard grass (Echinochloa crus-galli) and bulrush (Scriptus juncoides) for those herbicidal activities at a rate of 0.1 ㎏/㏊ with post emergence under submerged conditions. The structure activity relationships(SARs) on herbicidal activity of SR₂=2-arylthio substituents on the pyrrole ring were analysized. From the results, the relative contribute orders of the SR₂ with phenyl group on the activity are meta> para> ortho-substituents. Among these compounds, the R₁=propargyl(IA) substituents, 1~12 showed higher activity than the R₁=2-chloro-2-propenyl(IB) substituents, 13-16. The SR₂ groups of IA substituents shown that the optimal steric constant, (Es)<SUB>opt.</SUB>=3.25 and m-phenylthio substituents were found to be contribute the activity against barnyard grass. But the herbicidal activity of IB substituents against bulrush would depend upon the molar refractivity, M<SUB>R</SUB> constant of SR₂ group.