http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
편재하중을 (偏載荷重) 받는 연약지반속의 벽강관식 (壁鋼管式) 안벽의 안정 해석
홍원표(Won Pyo Hong),이우현(Woo Hyun Lee),남정만(Jeong Man Nam),한중근(Jung Geun Han) 한국강구조학회 1990 韓國鋼構造學會誌 Vol.2 No.4
Recently quaywalls are constructed in soft soil by placing steel-pipe piles at close intervals in a row. Because of complexity of the soil-pile interaction mechanism, the usual analytical methods, which are applied to analyze behaviors of common sheetpiles, can not be applied for analysis of the quaywalls. In order to establish a reasonable analytical method for the quaywalls constructed by steel-pipe piles, a couple of ideas was introduced in this study. For estimating lateral earth pressure acting on the quaywalls constructed by steel-pipe piles, the concept of the $quot;passive pile$quot; was introduced since the steel pipe piles was subjected to plastic lateral soil flow. The soil reactions against pile movements were considered by separating the soil modulus into two for above and below potential slip surfaces. The soil moduls above potential slip surfaces could be decided according to the slope deformability. On stability analysis of slope with quaywalls constructed by steel-pipe sheetpiling, the stabilities of both slope and piles should be considered simultaneously. Finally, the behavior of steel pipe piles was analysed by use of the proposed analytical method.
N,O와 N-O Carboxymethyl Chitosan의 NMR 기능을 이용한 분광학적 특성분석
남정표 ( Joung Pyo Nam ),허선행 ( Sun Heang Heo ),정현 ( Hyun Jung ),김동곤 ( Dong Gon Kim ),정영일 ( Young Il Jeong ),장미경 ( Mi Kyeong Jang ),나재운 ( Jae Woon Nah ) 한국공업화학회 2009 응용화학 Vol.13 No.1
Carboxymethyl chitosan (CMCh) was prepared by chemical reaction with mono-chloroacetic acid and glyoxylic acid to low molecular weight water soluble chitosan (LMWSC) of C6-OH (O-Carboxymethyl chitosan), C2-NH2 (N-Carboxymethylc chitosan) and both C6-OH and C2-NH2 (N,O-Carboxymethyl chitosan) group to apply as an ionic-drug carrier. The structure were characterized by 1H-NMR, 13C-NMR, DEPT 135 and HMQC (Heteronuclear Multiple Quantum Correlation). Degree of substitution (DS) and degree of deacetylation (DDA) of CMCh was determined by 1H-NMR.