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손주환 한국화학공학회 1971 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.9 No.1
The myo-inositol has a very suitable structure for stereochemical study. By the use of carbonyl com-pounds such as cyclohexanone, acetophenone and furfural, myo-inositol has been into 1,2-O-substituted derivaties. The presence of two contiguous hydroxyl groups in ax. -eq, position is necessary for reaction to occur predominantly. In this case, however, di-O-substituted derivatives have been obtained, in other words, contiguous hydroxyl groups in eq. -eq. position have reacted. The rate constants for the reaction of myo-inositol with carbonyl compounds and activation energys were evaluated. From the values obtained above, it was found that this reaction was pseudo-first reaction and the order of reaction could be represented as cyclohexanone> acetophenone> furfural.
황촉규근(黃蜀葵根) 점액에 관한 연구 : [제2보] 점액내 당류의 검색 [Part Ⅱ] Detection of Sugars in the Mucilage
손주환,온두현,임제빈 한국농화학회 1976 Applied Biological Chemistry (Appl Biol Chem) Vol.19 No.1
When the root of Abelmoschus manihot, MEDIC is stored in the water, the mucilage is extracted. The mucilage has contained some of free reducing sugars. We have investigated the change of free reducing sugars by the Bertrand method and also free reducing sugars are detected by paper chromatography and thin layer chromatography. The mucilage is isolated from the root of Abelmoschus manihot, MEDIC and its chemical components are detected. The mucilage and hydrolyzed products are examined by paper chromatography, thin layer chromatography and tested carbohydrates under the usual way. The results are as follow: 1. The mucilage has contained five kinds of monosaccharides which are rhamnose, xylose, arabinose, glucose, galactose and other three kinds of uronic acids. 2. In the mucilage, glucose is the most changeable sugar and the next are arabinase and galactose. 3. Uronic acids, pylose and rhamnose are remaired comparatively longer than glucose, galactose and arabinose in the mucilage. 4. The hydrolyzed products of mucilage consisted of rhamnose, xylose, arabinose, glucose, gelactose, ribose, some uronic acids and other unknown compounds. The essence of mucilage isolated from the root of Abelmoschus manihot, MEDIC is complex saccharide, glucose and ribose are newly certified. 6. We can guess that the components of the mucilage are rhamnose, xylose, arabinose, glucose, ribose, uronic acids and other unknown compounds.
불소계(弗素系) 계면활성제(界面活性劑)에 관한 연구(硏究): 제(第)1보(報) : 계면활성(界面活性) 함불소계(含弗素系) N-장쇄(長鎖)아실 크라운 에테르유(類)의 합성(合成)
손주환,남기대,이승열,소부영 한국유화학회 1990 한국응용과학기술학회지 Vol.7 No.1
In order to synthesize N,N-di-(polyoxyethylene) perfluoroacyl amines and the surface active monoperfluoroacyl aza crown ethers, it is performed as follow. Six of N,N-di(polyoxyethylene) perfluoro acyl amines were synthesized from perfluoroalkanoic acids with ethanol followed by oxyethylation with triethylene glycol mono chloride or tetra ethylene glycol mono chloride and six of N-perfluor acyl monoaza crown ethers by cyclization of corresponding N,N-di(polyoxy ethylene} perfluoro acyl amines with p-toluene suflonic chloride-NaOH/dioxane, p-toluene sulfonyl chloride KOH/dioxane and benzene sulfonic chloride-KOH/dioxane systems.
비이온성 계면활성제의 합성에 관한 연구 (제4보). 미오-이노시톨 에스테르의 합성과 계면활성
손주환,남기대,Joohwan Sohn,Kidae Nam 대한화학회 1982 대한화학회지 Vol.26 No.1
미오-이노시톨과 라우르산, 미리스트산, 팔미트산, 스테아르산 및 올레산등 5종의 지방산 메틸에스테르를 디메틸술폭시드 용매내에서 에스테르교환반응을 행하였다. 에스테르교환반응생성물은 얇은막 크로마토그래피, 관 크로마토그래피에 의하여 각각의 에스테르를 분리할 수 있고 미오-이노시톨 모노에스테르는 향류분배 방법에 의하여 잘 분리할 수 있다. 모노에스테르의 수용액에 대한 표면장력, 기포력, 유화력등을 측정하고 색소법에 의한 임계미셀농도를 추정하고 HLB값을 산정하였다. 이 결과로 미오-이노시톨모노에스테르는 계면활성을 나타낸다는 사실을 알았다. Transesterification reactions were carried out with myo-inositol and five fatty acid methyl esters such as methyl laurate, methyl myristate, methyl palmitate, methyl stearate and methyl oleate in the dimethylsulfoxide solvent. Their products were separated by both thin layer chromatography and column chromatography, and myo-inositol monoesters were quantitatively separated by counter current distribution. We measured their surface tension, foaming power and emulsifying power, determined critical micelle concentrations by the color method, and evaluated their hydrophilic-lipophilic balance. The results show that myo-inositol monoesters exhibit surface activites.