http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
당류계 종류 및 고로슬래그 미분말 치환율에 따른 시멘트 페이스트의 응결 특성
임군수(Lim, Gun Su),정영진(Jeong Yeong Jin),한수환(Han Soo Hwan),현승용(Hyun, Seung Yong),윤치환(Yoon, Chee Whan),한민철(Han, Min Cheol) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
본 연구는 당류계 종류 및 고로슬래그 미분말 치환율에 따른 시멘트 페이스트의 응결지연 특성을 고찰하고자 한다. 슈가 파우더, 백설탕 순으로 응결지연 성능이 뛰어나며, 사카린 및 아스파탐은 응결 지연 성능이 미소한 것으로 나타났다. 당류계 종류별로 응결지연 및 촉진 현상이 상이함으로 초지연제를 개발함에 있어 해당 당류의 특성을 충분히 고려할 필요가 있다. This study attempts to examine the setting time retarding properties of cement paste according to the sugar type change. It was confirmed that the setting time retarding performance was excellent in the order of sugar powder and white sugar, and that the setting time retarding performance of saccharin and aspartame was insignificant.
식물 병원균 Drechslera siccans 로 부터 분리한 세스터테르펜류 Siccanol 의 구조
임치환(Chi Hwan Lim),궁천항(Hisashi Miyagawa),상야민부(Tamio Ueno),죽중 수행(Hideyuki Takenaka),성낙도(Nack Do Sung) 한국응용생명화학회 1996 Applied Biological Chemistry (Appl Biol Chem) Vol.39 No.3
A bicyclic sesterterpene from Drechslera siccans was purified and structurally characterized. During the isolation procedure, the toxic component was monitored by the assay using Italian ryegrass (Lolium multiflorum Lam.), one of the host plants of the pathogen. Siccanol (1) named arbitrarily was shown to have a molecular formula of C_(25)H_(38)O₄. Siccanol completely inhibited the root growth of the Italian ryegrass seedlings at a level of 100 ppm.
요구사항 관점에서 의사결정을 위한 QFD와 PROMETHEE의 통합 접근방법
임치환 ( Chee Hwan Lim ) 한국경영공학회 2012 한국경영공학회지 Vol.17 No.1
Most of the economical, industrial, financial or political decision problems should satisfy multiple criteria by considering both the quantitative(economical) factors and the qualitative factors. The problem of the selection or the ranking of alternatives submitted to a multi-criteria evaluation is not an easy problem. Also, the evaluating criteria for a decision problem must be established from the viewpoints of various stakeholders(e.g., customers, suppliers, employers and employees) to satisfy their multiple requirements. In this study, an integrated approach which employs quality function deployment (QFD)and preference ranking organization method for enrichment evaluations (PROMETHEE) together, is proposed for the decision making under requirement perspective. The QFD is used to determine weights of the criteria from requirement perspective, the PROMETHEE is used to obtain final ranking, and to make a visual analysis by using geometrical analysis for interactive assistance(GAIA) plane. Proposed approach is applied to a problem of selecting facility location that satisfies multiple location criteria under requirement perspective.
임치환,정규웅,고봉기,윤정훈 한국산업경영시스템학회 2003 한국산업경영시스템학회 학술대회 Vol.2003 No.춘계
To be successful in increasingly competitive Internet marketplace, it is essential to capture customer loyalty. In this paper, we provide an intelligent agent approach to incorporate human sensibility into an one-to-one recommendation service in cyber shopping mall. Our system exploits human sensibility ergonomics and on-line preference matching technologies to tailor to the customer the suggestion of goods and the description of store catalog. By presenting goods that are consistent with user interests as well as user sensibility, the accuracy and satisfaction of the recommendation service may be improved.
고구마 검은썩음병균(Lasiodiplodia theobromae)으로부터 식물독소의 분리 및 구조
임치환 충남대학교 농업과학연구소 1998 농업과학연구 Vol.25 No.1
Lasiodiplodia theobromae is a pathogen of Java black rot on sweet potato. This fungus infects the tuberous root during storage after harvest. Invasion of the fungus results in the expansion of necrosis sites into the tuberous roots. The resultant necrotic symptom of the tissue is also induced by application of acetone extract of the fungus growing on potato sucrose agar (PSA) culture. The active principles to induce the necrosis are purified from the acetone extract as follows. After evaporation of hexane-benzene-EtOAc (1:2:1, v/v/v) the extract was fractioned on silica gel column, using a solvent gradient system from n-hexane to EtOAc and then to MeOH. The active fractions were purified with HPLC on Nucleosil 50-5 column by eluting n-hexane to EtOAc. Their structures are established by using spectroscopic techniques and synthesis to 4-hydroxymellein and mellein, respectively. Application of small amount of these compounds induce expansion of the necrotic symptom into the tissue and accumulated ipomeamarone. Conclusively, these compounds acted as phytotoxins (inducing necrosis) and as elicitors (eliciting the phytoalexin).