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제지폐수처리용 생물고분자응집제를 생산하는 Bacillus sp. K-111의 배양특성조사
권기석,손용호,최선택,정석관,송숙희,김동걸 7개 국립대학교 환경연구 논문집 공동발행 위원회 2002 환경연구논문집 Vol.2 No.1
Flocculant-producing microorganisms were screened from obtained strains in the laboratory using a pulp-wastewater treatment as the flocculating agent. K-111 strain that had high flocculating activity among them was selected and identified as Bacillus sp. K-111 16s rDNA sequencing. The favorable medium for the production of flocculant was glucose 1.5%, NH_4NO_3 0.2%, tryptone 0.01%, K_2HPO_4 0.08%, KH_2PO_4 0.06%, CaCO_3 0.03%, MgSO_4·7H_2O 0.005%, MnSO_4 0.005% in 1 liter of D.W. at initial pH 7.0. The optimum culture temperature and pH were 30℃ and pH 7.0, respectively. the flocculating activity was observed most highly after 36 to 48 hr of cultivation at the optimum conditions. the flocculating activity of produced biopolymer on optimum conditions was about 2.5-fold higher than that of screening medium.
권미애,신석우 여수대학교 1998 論文集 Vol.12 No.2
To obtain of the microbiological basic and a monitoring data of polluted sewage, microflora isolated from sewages in Pongsan, Yondung, and Kuk-dong river in Yosu city for 12 months from July 1996 to June 1997 was investigated. The results were as follow. On the occasion of cultivation for five days at 5℃, possible strain for growth from among 240 strains isolated from these sewages was 36%, 97% for 24~72 hours at 25℃, and 88% for 24~48 hours at 40℃. The possible strain for growth among 240 strains in NaCl 0% and 75% art sea water averaged 92% and 89%, respectivity. And also the average 74% of them was growth possibility in 3% NaCl. The optimum pH for growth of them was 7.0 but these strains did not growth in pH 5.0 and 36% among 80 strains experimented was growth possibility even in pH 10.0. Among 720 strains isolated from these sewages, gram negative rods was 560 strains, gram positive rod 33 strains, and gram positive cocci 75 strains. Enterobaceriaceae among 560 strains of gram negative rods was 193 strains and Pseudomonas 143 strains. The capability of protein and starch hydrolysis among 720 strains was 282 and 300 strains, respectively.
Thermus flavus AT-62 균주의 내열성 DNA Ligase 유전자의 Cloning 및 발현
권석태 성균관대학교 생명과학자원연구소 1994 生命資源科學硏究 Vol.1 No.1
The DNA fragment encoding DNA ligase from Thermus flovus AT-62 was cloned into Escherichia coli using polymerase chain reaction(PCR) method. Under tac promoter control, Thermus flavus AT-62(Tfl) DNA ligase was expressed in E colt. Tfl DNA ligase in E. coli was purified by simple methods like heat treating, DEAESephacel and Cellulose phosphate column chromatography. The purified enzyme had a molecular mass of about 77kDa, estimated by sodium dodecyl sulfate-polyacrylamide-gel electrophoresis. The purified Tfl DNA ligase was capable of catalyzing blunt-end ligation at 65℃.
Thermus caldophilus GK24 DNA Polymerase를 이용한 Polymerase Chain Reaction의 최적조건
권석태 성균관대학교 생명과학자원연구소 1994 生命資源科學硏究 Vol.1 No.1
A thermostable DNA polymerase was used in an in vitro amplification procedure, the polymerase chain reaction(PCR). Thermus caldophilus GK24(Tca) DNA polymerase greatly simplifies the procedure and, by enabling the amplificatioin reaction to be performed at higher temperature, significantly improves the specificity, yield and sensitivity. The optimal conditions for PCR were investigated in terms of pH range, MgCl_2, KCl and DTT concentration using the purified Tca DNA polymerase. The optimal pH for DNA amplification was found to be between 8.6, and 9.2 in 50mM Tris-HCl buffer. The optimal concentrations of MgCl_2 and KCl for PCR were 1-1.5mM and 10-50mM, respectively. The concentration of DTT above 0.5mM was sufficient to amplify template DNA by PCR. These conditions can be used to amplify a wide range of target sequences with excellent specificity.
權奭基 홍익대학교 산업기술연구소 2002 産業技術 Vol.12 No.-
Diagnostic membranes which were made of polyurethanes were prepared to measure the concentration of glucose in blood. It was found that the end-point results of K/S had a linear relationship toward the glucose concentration.
권오준,이은정,최웅규,손동화,이석일,정연건,지원대 한국위생과학회 2002 한국위생과학회지 Vol.8 No.2
새로운 장류제품으로서 보리등겨의 이용방안을 모색하기 위하여 간장을 만들어 연구하였다. 보리로 제조한 간장의 갈색화는 점차적으로 증가 하였으며 완만한 변화를 보였다. 향기성분으로는 4-vinyl-2-methoxy-phenol, benzeneacetaldehyde, palmitic acid, 2-furancatboxaldehyde, methyl-9, 12-octadecadienoate, di-(2-ethylhexyl)phthalate, diethyl phtalate, dibytyl-1,2-benzenedicatboxylate, 5-methyl-2-furancarboxaldehyde, 3,4-dimethyl-1h-pyrazole, phenylethyl alcohol, dioctyl-hexanedioate, dimethyl-1,2-benzenedicatboxylate, benzaldehyde, methional, 2-methoxy-phenol, n-furfurylidene-3-methylbutyl amine, 1-furfuryl-2-formyl pyrrole, tetradrcanoic acid, 5-methyl-pyrimidine, 4-methyl-5-hydroxymethyl-imidazole, maltol, 5-(5-methyl-2-furanyl)methyl-2-furancarboxaldehyde 순으로 높은 함량을 차지 하였다. For investigation of new utilization as jang-products, kanjang was prepared using barely bran. This study was conducted to investigate flavor components of kanjang during fermentation time. The optical density was gradually increased. Among the flavor components identified in kanjang made with barley bran, the contents of 4-viny1-2-methoxy-phenol was the most in quantity followed by benzeneacetaldehyde, palmitic acid, 2-furancarboxaldehyde, methyl-9,12-octadecadienoate, di-(2-ethylhexyl)phthalate, diethyl phtalate, dibutyl-1,2-benzendicarboxylate, 5-methyl-2-furancarboxaldehyde, 3,4-dimethyl-1h-pyrazole, phenylethyl alcohol, dioctyl-hexanedioate, dimethyl-1,2-benzenedicarboxylate, benzaldehyde, methional, 2-methoxy-phenol, n-furfurylidene-3-methylbutyl amine, 1-furfuryl-2-formyl pyrrole, tetradecanoic acid, 5-methyl-pyrimidine, 4-methyl-5-hydroxymethyl-imidazole, maltol and 5-(5-methyl-2-furanyl)methyl-2-furancarboxaldegyde.
權奭基 홍익대학교 산업기술연구소 2003 産業技術 Vol.13 No.-
The end-point results of K/S values with polyurethane diaganostic membranes had a linear relationship toward the glucose concentration. Testing Temperatures did not show the serious effects on each glucose concentration.
대장균에서 Thermus caldophilus GK24의 DNA Polymerase유전자의 고발현
권석태,김현규,김중수,이대실 성균관대학교 생명과학자원연구소 1997 生命資源科學硏究 Vol.4 No.2
Thermus caldophilus GK24 (Tca) DNA polymerase is highly useful enzyme for amplifying DNA fragments by polymerase chain reaction (PCR). A plasmid, pTCA, is expression vector for Tca DNA polymerase gene in Escherichia coli under the control of tac promoter and its expression level is low. For the high expression, the DNA sequence coding for NH_2-amino acid sequence of Tca DNA polymerase was changed by PCR, and then an expression vector pTCAM was constructed. The activity of Tca DNA polymerase in E. coli harboring for pTCAM has enhanced nearly 6-fold/ml than that for E. coli harboring pTCA.