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Construction stage analysis of Kömürhan Highway Bridge using time dependent material properties
Altunisik, Ahmet Can,Bayraktar, Alemdar,Sevim, Baris,Adanur, Suleyman,Domanic, Arman Techno-Press 2010 Structural Engineering and Mechanics, An Int'l Jou Vol.36 No.2
The aim of this study concerns with the construction stage analysis of highway bridges constructed with balanced cantilever method using time dependent material properties. K$\ddot{o}$m$\ddot{u}$rhan Highway Bridge constructed with balanced cantilever method and located on the 51st km of Elazi$\check{g}$-Malatya, Turkey, highway over Firat River is selected as an application. Finite element models of the bridge are modelled using SAP2000 program. Geometric nonlinearity is taken into consideration in the analysis using P-Delta plus large displacement criterion. The time dependent material strength variations and geometric variations are included in the analysis. Elasticity modulus, creep and shrinkage are computed for different stages of the construction process. The structural behaviour of the bridge at different construction stages has been examined. Two different finite element analyses with and without construction stages are carried out and results are compared with each other. As analyses result, variation of internal forces such as bending moment, axial forces and shear forces for bridge deck and column are given with detail. It is seen that construction stage analysis has remarkable effect on the structural behaviour of the bridge.
Glucanhydrolase from Lipomyces starkeyi KSM 22 as Potential Mouthwash Ingredient
KIM, DOMAN,RYU, SU-JIN,SON, EUN-JU,CHUNG, HYUN-JU,KIM, SEUNG-HEUK,KIM, DO-WON,DAY, DONAL F. 한국미생물 · 생명공학회 2002 Journal of microbiology and biotechnology Vol.12 No.6
A glucanhydrolase (a DXAMase exhibiting both dextranolytic and amylolytic activities) from Lipomyces starkeyi KSM 22 hydrolyzed polysaccharides having α-(1→3)-, α-(1→4)-, and α-(1→6)-D-glucosidic likages. The oral hygiene benefits of DXAMase-containing mouthwash were examined in relation to human experimental gingivitis during a 3-week period without brushing. The DXAMase-treated group exhibitied a lower increase in plaque accumulation and gingival index score than the chlorhexidine-treated group. The DXAMase-treated group also showed less tongue accumulation, had taste, and tooth staining, thus indicating a positive role for DXAMase as an antiplaque agent ingredient.
김도만,류수진,박관하,ROBYT, JOHN F. 全南大學校 觸媒硏究所 1998 觸媒硏究 論文集 Vol.20 No.-
Acarbose effectively inhibited the synthesis of dextran, and the inhibition pattern was a noncompetitive type with ?? value of 1.35mM. It also inhibited the disproport-ionation reaction of dextransucrase with isomaltotriose and decreased the efficiency of the maltose acceptor reaction. Increased concentration of dextransucrase or maltose in reaction digests, however, decreased the degree of inhibition by acarbose.
Facile Purification and Characterization of Dextransucrase from Leuconostoc mesenteroides B-512FMCM
KIM, DOMAN,KIM, DO-WON 한국미생물 · 생명공학회 1999 Journal of microbiology and biotechnology Vol.9 No.2
A simple sequence of membrane concentration and DEAE-Cellulose chromatography has been optimized to give a purified dextransucrase from Leuconostoc mesenteroides B-512FMCM with the highest specific activity (248.8 IU/㎎ protein) ever reported in high yield (overall 88.7%) for dextransucrase. When there was no sucrose in the dextransucrase and the dextran reaction digest. the dextransucrase hydrolyzed glucose from dextran. The glucose was transferred to the other glucoses from dextran and formed isomaltose and isomaltodextrin. The transglycosylation efficiency of glucose from dextran was much higher with acceptors. The dextransucrase can be used for the production of various kinds (or structures) of oligosacchaides using dextran and various acceptors with almost 100% theoretical yield.