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박노국,유성구,서길수,이태진 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2
The sulfidation reaction of calcium carbonate to remove H2S were investigated. Expecially, the effect of polymorphs of calcium carbonate and reaction temperature on the sulfur capture were determined. It was found that calcination reaction of calcium carbonate were influenced by polymorphs of calcium carbonate. The calcination temperatures of aragonite were lower than those of other calcium carbonates. For the sulfidation of calcite with H2S, the effect of reaction temperature on the sulfur capture were not found. But in caes of vaterite and aragonite, the reaction temperature were found to have a significant effect on the sulfidation reaction. From in these results, optimum temperatures of sulfidation reaction using vaterite and aragonite were determined at 800∼850℃ and 750℃, respectively.
Choi, Su-Young,Shin, Jae-Hong,Ryu, Chung-Kyu,Nam, Ky-Youb,No, Kyoung-Tai,Park Choo, Hea-Young 이화여자대학교 약학연구소 2005 藥學硏究論文集 Vol.- No.15
It was reported that some 1,4-quinone derivatives such as 6-(N-arylamion)-7-chloro/6,7-bis[S-(aryl)thio]-5,8-quinolinedione and 6-arylthio-/5,6-arylamino-4-7-dioxobenzothiazoles have antifungal effects. To understand the structural basis for actifungal activity and guide in the design of more potent agents, we performed three-dimensional quantitative structure-activity relationship studies for a series of compounds using comparative molecular field analysis(CoMFA). The MIC values of 1,4-quinone derivatives on Aspergillus niger exhibited a strong correlation with steric and electrostatic factors of the 3D structure of molecules. The statistical results of the training set, cross-validated q²(0.683) and conventional r²(0.877) values, gave reliability to the prediction of inhibitory activity of a series of compounds. We also performed recursive partitioning (RP) analysis, used for the classification of molecules with activity using CART methods. Physicochemical, structural, and topological connectivity indices and E-state key descriptors were used for obtaining the decision tree models. The decision tree could classify the inhibitory activity of 1,4-quinone derivatives and its essential descriptors were S_aaN, Hbond doner, and Kappa-3.
Effects of Storage Temperature on Quality of Eggs Coated with Chitosan
( Kyeong Nam Ryu ),( Su Hyun Kim ),( Hong Kyoon No ),( Witoon Prinyawiwatkul ) 한국키틴키토산학회 2009 한국키틴키토산학회지 Vol.14 No.3
Effects of different storage temperatures (25, 10 and 4℃) on selected internal quality of chitosan-coated eggs were evaluated during 18 wk of storage. The Haugh unit values suggested that chitosan coating preserved the albumen quality of eggs for about 2 wk longer than observed for the noncoated eggs at 25 and 10℃. At 4℃ storage temperature, there was, however, no notable advantage of chitosan coating in preserving the albumen quality of eggs because both noncoated and chitosan-coated eggs maintained the initial AA grade during 18 wk of storage. Chitosan coating and refrigerated storage were both effective in minimizing weight loss of eggs. Decreasing albumen weight and increasing yolk weight with increasing storage periods could be retarded by either refrigerated storage, particularly at 4℃ or chitosan coating.
유성수(Song-su Ryu),노봉남(Bong-nam No) 한국정보과학회 2006 한국정보과학회 학술발표논문집 Vol.33 No.2C
AJAX(Asynchronous Javascript and XML) 이란 기존에 존재하는 기술들의 조합으로 이루어진 새로운 웹 플랫폼 기반 어플리케이션 개발 기술이다. 데스크탑 어플리케이션과 같은 기능을 웹에서 실행 가능하게 하는 가능성을 가지고 있는 기술로, 앞으로의 웹 어플리케이션의 방향성을 제시하고 있다. 본 논문에서는 Ajax에 사용되어지는 기술들을 소개하고, Ajax의 특징 및 사용 예를 살펴보고, Ajax에서의 보안문제에 대해서 소개한다.
서혜영(Hye-Young Seo),노기미(Ki-Mi No),심성례(Seong-Lye Shim),류근영(Keun-Young Ryu),한규재(Kyu Jae Han),라젠드라 게왈리(Rajendra Gyawali),김경수(Kyong?Su Kim) 한국식품영양과학회 2006 한국식품영양과학회지 Vol.35 No.7
건생강 제품의 진위판별을 위한 기초자료를 제공하기 위하여 건조된 생강으로부터 휘발성 향기성분을 추출하여 향기특성을 분석하고, MDGC/MS에 의해 키랄성 휘발성분의 enantiomeric composition을 분석하였다. 건생강에서 총 57종을 동정하였으며 주요 휘발성 향기성분은 zingiberene, β-sesquiphellandrene, β-bisabolene, (E,E)-α-farnesene 및 α-curcumene이었다. 건생강에 함유된 키랄성 향기성분 중에 서 enaniomeric composition을 측정하기 위해 선택된 키랄화합물 중 α-pinene 및 nerolidol은 높은 enantiomeric purity(>96%)로 검출되었으며, β-pinene은 (R)-enantiomer 만이 검출되어 특이적이었다. α-Terpineol은 (R)-enantiomer가 72%로 높게 나타났으며 linalool과 4-terpineol은 두 이성질체가 혼합된 것으로 나타났다. Limonene의 enantiomeric excess(ee, %)는 17.2%로 (S)-enantiomer가 주요 이성질체이었다. 따라서 이러한 키랄성 향기성분의 enantiomeric composition은 건생강의 진위평가를 위한 변수로 사용될 수 있을 것으로 생각된다. The volatile compounds of Zingiber officinale Roscoe were extracted by simultaneous steam distillation and extraction (SDE) method and identified with gas chromatography/mass spectrometer (GC/MS) analysis. Enantiomeric compositions of chiral compounds were determined by multidimensional gas chromatography/ mass spectrometer (MDGC/MS). A total of 57 compounds were identified and quantified, including zingiberene, β-sesquiphellandrene, β-bisabolene, (E,E)-α-farnesene and α-curcumene. Among them, zingiberene (38.41%) was found as the predominantly abundant component. α-Pinene and nerolidol in dried ginger were detected by high enantiomeric purity (>96%) for (S)-form, and β-pinene was detected only (R)-form. The enantiomeric composition of α-terpineol revealed 72.0% for (R)-form, and linalool and 4-terpineol showed mixtures of both enantiomers. (S)-Enantiomer was the major enantiomer of limonene having enatiomeric excess of 17.2%. Hence the enantiomeric composition of these compounds can be used as parameter for authenticity control of Zingiber officinale.