http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
활성오니 미생물에 의한 PLLA 와 그 블렌드의 생분해
김말남,김근화 ( Mal Nam Kim,Keun Hwa Kim ) 한국환경생물학회 1997 환경생물 : 환경생물학회지 Vol.15 No.2
Dependence of biodegradability of Poly (L-lactic acid) (PLLA) and its blends on molecular weight and compatibility was explored using microorganisms in an activated sludge. The microorganisms metabolited PLLA relatively easily into CO_2 when the molecular weight of PLLA was as low as 6,000g/mol. However the molecular weight effect on the biodegradability leveled off when the molecular weight exceeded 12,000 g/mol. Biodegradability of PLLA blended with poly (ethylene-co-vinyl acetate) (EVA) which is recalcitrant against biodegradation varied along with the compatibility of the blend. Addition of EVA85 (vinyl acetate content of 85 wt%) into PLLA decreased the biodegradability rapidly while EVA70 (vinyl acetate content of 70 wt%) lowered the biodegradability relatively slowly.
토양 매립 시험에서 Poly(butylene succinate-co-butylene adipate)의 생분해 특성
김말남 ( Mal Nam Kim ) 한국환경생물학회 2010 환경생물 : 환경생물학회지 Vol.28 No.3
Biodegradation behavior of poly(butylene succinate-co-butylene adipate) (PBSA) was examined when PBSA was buried in the natural soil and the soil inoculated with Burkholderia cepacia after sterilization. After 80 days of the soil burial test at room temperature, the PBSA film buried in the natural soil lost 34.0% of its intial weight, while the same film lost 59.2% of its initial weight when buried in the sterile soil inoculated with B. cepacia. The optical and SEM observations of the surface morphology of the PBSA film also indicated that the surface erosion and rupture took place faster when the film was buried in the sterile soil inoculated with B. cepacia compared to the film buried in the natural soil. Viable cell number in the natural soil and that the sterile soil inoculated with B. cepacia increased by a factor of 6~7 and 10~14, respectively as compared to the initial viable cell number.
김말남 ( Mal Nam Kim ) 상명대학교 자연과학연구소 2005 自然科學硏究 Vol.15 No.-
생분해성 플라스틱으로 현재 상업화에 가장 근접해 있는 Biopol(TM)(PHB)과 Sky-Green 2108(TM)(SG)을 분해하는 진균 5주를 활성오니토와 경작토에 매립하였을 때 분해에 관계하는 진균의 형태적 특성을 조사하여 이를 동정하였다. Paecilomyces farinosus LAR 10은 PHB와 SG를 매립한 경작토에서만 분리되었고 활성오니토에서는 존재하지 않았다. Penicillium simplicissimum LAR 13은 PHB와 SG를 매립한 활성오니토에서만 분리되었고 경작토에서는 검출되지 않았다. Curvlaria protuberata LAR 12는 SG를 매립한 활성오니토에서만 분리되고 경작토에서는 분리되지 않았을 뿐만 아니라 이 진균은 PHB 분해능이 없었다. Penicillium minioluteum LAR 14와 Penicillium funiculosum LAR 18은 PHB를 매립한 활성오니토와 경작토 모두에서 분리되었으나 SG에 대한 분해 활성은 나타내지 않았다.
Poly ( 3 - hydroxybutyrate ) 표면 형태가 생분해에 미치는 영향
김말남(Mal Nam Kim),이애리(Ae Ri Lee) 한국환경생물학회 1999 환경생물 : 환경생물학회지 Vol.17 No.3
The effect of surface roughness on biodegradability of poly (3-hydroxybutyrate) was investigated. The PHB film prepared by cooling the molten polymer slowly (-0.5℃/min) had higher crystallinity and melting temperature than that prepared by quenching into liquid nitrogen followed by annealing at 90℃ for 2 hours. However, the former sample was found to degrade faster than the latter due to presence of microscopic crack. Roughening the surface of a PHB film by hot pressing under a coarse surfaced plate accelerated the bioerosion considerably of the sample in comparison with the sample having the same thermal history but smooth surface. [Poly (3-hydroxybutyrate), biodegradability, surface roughness, the modified Sturm test].
Candida sp. LSY2 중금속 내성주를 이용한 BOD 분석
김말남(Mal Nam Kim),이선영(Sun Young Lee) 한국환경생물학회 1999 환경생물 : 환경생물학회지 Vol.17 No.4
A biochemical oxygen demand (BOD) sensor loaded with Candida sp. was designed and constructed for the quick measurement of the concentrations of biologically assimilable organic substances dissolved in water. The sensitivity of the sensor was higher for glucose, acetic acid, aspartic acid and glutamic acid than that for lactose, sucrose and lactic acid. The sensitivities of BOD sensors loaded with Zn^2+ tolerant and intact strains were almost identical while the sensitivity of sensor loaded with Cd^2+ tolerant strain was considerably lower. The sensitivities of the sensors loaded with intact or Zn^2+ tolerant strains did not change with the concentration of Cd^2+ in the aqueous solution while the sensitivity of the sensor loaded with Cd^2+ tolerant strain decreased slightly. The sensitivities of the sensors loaded with intact strain, Zn^2+ or Cd^2+, tolerant strains were not affected by the concentration of Zn^2+ in the aqueous solution. [BOD biosensor, Candida sp., Zn^2+ tolerant strain, Cd^2+ tolerant strain].
Serratia marcescens LSY4 중금속 내성주를 이용한 BOD센서의 감응도
김말남 ( Mal Nam Kim ),이선영 ( Sun Young Lee ) 한국환경생물학회 2004 환경생물 : 환경생물학회지 Vol.22 No.3
S. marcescens LSY4가 충전된 BOD센서를 제작하여 표준오염물질을 포함한 수용액의 BOD를 측정하였다. 배양시간이 9~16시간일 때에는 배양시간에 따른 BOD센서의 감응도에 큰 차이를 나타내지 않았으며, 균체량도 0.22~0.75 mg cm^(-2)의 범위에서는 거의 동일한 센서의 감응도를 나타내었다. 수용액의 pH가 4~9사이로 변화할 경우 센서의 감응도가 가역적으로 변화하였으나 수용액이 더 산성이거나 더 염기성이 되면 센서의 감응도가 비가역적으로 저하되었다. 수용액에 중금속이온이 첨가되면 센서의 감응도가 감소하였으며, Zn^(2+)나 Cd^(2+)보다 Cu^(2+) 혹은 Ag^+가 첨가되었을 떼 센서의 감응도가 더 급격히 감소하였다. 중금속에 대한 내성이 유도된 균체를 충전하였을 때 중금속이온의 첨가에 따른 센서의 감응도 감소가 크게 완화되었으며, 이런 효과는 Cd^(2+)내성주보다 Cu^(2+)내성주에서 더 현저하였다. A BOD sensor was prepared with S. marcescens LSY4 and was applied for measurement of BOD values of a solution containing the standard organic pollutants. The sensor sensitivity was nearly independent of the culture time in the range of 9-16 hours. It was also affected little by the cell mass in the range of 0.22-0.75 mg cm^(-2). A cyclic change in the solution pH in the range of 4-9 was accompanied by a reversible variation in the sensor sensitivity. However, the reversibility was lost when the solution pH became more acidic or more basic. Heavy metal ions lowered the sensor sensitivity, which took place more precipitously in the presence of Cu^(2+) and Ag^+ rather than in the presence of Zn^(2+) and Cd^(2+). The reduction of the sensor sensitivity was significantly attenuated by loading heavy metal ion tolerance induced strain. The Cu^(2+) tolerance induced strain was more efficient for the attenuation than Zn^(2+) and Cd^(2+) tolerance induced strain.
김말남 ( Mal Nam Kim ) 상명대학교 자연과학연구소 2005 自然科學硏究 Vol.14 No.-
살모넬라균을 대상으로 ampicillin, carbenicillin, tetracycline, streptomycin, neomycin, sulfamethoxazol-trimethoprim의 항균제 내성을 시험한 결과 20주 중 17주가 내성을 나 타내었다. 12주는 4제 이상의 항균제에 내성을 가진 다가내성주로 나타났다. S. Schwarzengrund은 6제의 항균제에 모두 내성을 나타내었다. 항균제 내성주들은 2.7-38.6 Mda 크기의 plasmid를 1-3개씩 가진 반면, 비내성주들은 plasmid를 가지고 있지 않아서 항균제 내성은 plasmid DNA와 연관성을 나타내었다.