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권태종,채호철,한창수,정진태,안강호 한국생산제조학회 2000 한국공작기계학회지 Vol.9 No.6
Spinning mechanism is generally used in coasting process on grass plates. Rebounding PR(Photo Resist) which leads to occur inferiority of coating process is caused by vibrational energy of whole coating system. In this study, the sensitivity analysis is performed to analyze and reduce vibrational terms in the spin coating system. The sensitivity analysis is bared on the numerical expression of this system. By the bond graph method. power flow of each system is represented by some basic bond graph elements. Any energy domain system is modeled using the unified elements. The modelled spin coater system is verified with power spectrum data measured by FFT analyzer. As the results of verifying model parameters and sensitivity analysis, principal factors causing vibration phenomenon are mentioned. A study on vibration method in the spin coating system is discussed.
권태종,이주경,이상훈 한국미생물 · 생명공학회 1990 한국미생물·생명공학회지 Vol.18 No.5
Hydantoinase(EC3.5.2.2) 생산을 위해 토양에서 분리한 균주 Y -183을 배양시킨 결과 Glycerol이 탄소원으로 양호했으며, 질소원으로는 혼합된 형태의 질소원이 요구되었다. 특히 Yeast ext.와 Beef ext.가 효소생성에 크게 영향을 미쳤고, Hydantoin 유도체 및 Pyrimidine 유도체의 영향을 조사한 결과 Uracil이 가장 양호한 결과를 나타냈다. 배양시간은 방선균의 특성상 72시간의 배양이 필요했으며 효소의 생성은 24시간 이후에 왕성하였다. 생성된 Hydantoinase는 균체내에 효소를 축적했으며 이들은 추출하여 기질로서 PL-5-phenylhydantion 등과 반응시킨 결과 N-carbamyl-D-amino acids가 생산되는 것이 분석결과 확인되었다. In order to investigate hydantoinase-producing strain of the genus Streptomyces, 523 strains of Streptomycee sp. isolated from soils were cultivated in various media and conversion activity of the enzyme was measured to DL-5-phenylhydantoin. A number of strains producing hydantoinase were detected and among them, the strain of Streptomyces sp. Y-183 was selected as a most powerful strain to producing the enzyme. The optimal culture conditions for the production of hydantoinase of the strain were studied, and it was found that almost all hydantoinase activity was produced in the cell fraction. The maximum activity of the enzyme, 17.8 unitstg of dried cells weight, was obtained when the strain was cultured at $30^{\circ}C$ for 72 hr in a medium containing 1.0% of glycerol. 0.5% of yeast extract. 0.5% of soytone, 0.5% of beef extract, 0.6% of KCI, 0.002% of $K_2HP0_4, 0.25% \;of \;CaC0_3, \;0.0002% \; of \; ZnSO_4, \; 0.0002%\; of\; FeS0_4$, and 0.4% of uracil as an inducer, and the pH of culture broth was adjusted ranging from 7.0 to 7.5.
Alkali성 Protease를 생산하는 Xanthomonas sp. YL-37 균주의 batch 및 fed-batch배양
장형수,권태종 尙志大學校 1998 論文集 Vol.19 No.-
The Xanthomonas sp. YL-37 produced extracellular alkaline protease was isolated from soil. In the batch and fed batch culture of Xanthomonas sp. YL-37. The optimal pH, aeration, and agitation, DO, feeding for alkaline protease by Xanthomonas sp. YL-37 were pH 10.0, 2.0vvm, 150rpm, 2~4g/liter, respectively. The alkaline protease activity was about 16,000DU/㎖ after cultivating for 160hrs.
權泰鍾 건국대학교 1981 學術誌 Vol.25 No.1
A strain of Aspergillus species C-58 was produced much inulin hydrolyzing enzyme(EC 3.2.1.7) in wheat bran solid medium than glucose liquid medium Optimal conditions for the inulase production by Asp. sp. C-58 strain on wheat bran solid medium were established. The results were as follows. 1.Optimal content of moisture on the inulase production at the wheat bran solid medium was about 50% 2.Inulase production on the wheat bran medium from Asp. sp. C-58 strain was increased by addition of 3%-glucose solution. 3.Organic nitrogen sources, inorganic nitrogen sources and inorganic salts which there were no or very little increase in wheat bran medium. 4.Effectual initial pH on the inulase production were pH 4.0 to 5.0. 5.Optimum culture period on the inulase production was to be 5 days.
權泰種 건국대학교 1980 學術誌 Vol.24 No.2
A strain of Aspergillus species (C-58), isolated from 52 kinds of soil sample, was found to produce a strong inulase in the culture filtrate. Selected strain produced extracellular inulase when cultured in a medium containing not only glucose but also pentose, hexose and inulin, respectively. And obtained results were as in the following. 1.Selected strain was identified to Aspergillus species. 2.Culture filtrate is responsible for the hydrolysis not only of the simple β-fructoside such as sucrose but also of the polysaccharide, inulin. 3.The most effective starting concentration of glucose was 1.5% and reasonable period of shaking culture was 8 days in the preculturing. 4.The enzyme production was found to increase significantly with the addition of corn steep liquor (1.0%), NH4H2PO4 and (NH4)2PHO4 for the nitrogen sources to the medium. 5.The enzyme production was increased with the addition of NaCl, KCI and MgSO4 7H2O for the salts. 6.Optimum initial pH for the production of inulase by shaking culture was 5.0. 7.The addition concentration of CaCO3 was 1.0% after 24 hrs cultivation in the cultures.
효모(pichia sp. JAM-3032)가 생산하는 Methanol oxidase의 정제 및 성질
權泰鍾 건국대학교 1993 學術誌 Vol.37 No.2
Alcohol oxidase produced by methanol utilizable Pichia sp. JAM-3032 was purified and its characteristics were investigated. The enzyme was purified 2.5-fold by precipitation with ammonium sulfate, DEAE-Sephadex A-50 and Sephadex G-200 column chromatography with yield of 25.3% from cell free extract. The alcohol oxidase was composed with eight subunits, and each subunit contained one FAD as prosthetic group and Mg2+ as cofactor. Pichia JAM-3032 alcohol oxidase contained higher percentage of glycine and alanine, but lower tyrosine and glutamic acid compared with Kloeckera alcohol oxidase.