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Rhodocyclus gelatinosus KUP-74의 휴지균체를 이용한 ${\delta}-Aminolevulinate$의 생산
이소희,안영철,임왕진,황세영,Lee, So-Hee,An, Young-Chul,Lim, Wang-Jin,Hwang, Se-Young 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.6
광합성세균인 Rhodocyclus gelatinosus KUP-74의 휴지균체에 의한 균체외 ${\delta}-aminolevulinate$(ALA) 생산 효율성에 관하여 검토하였다. 균체외 ALA의 최대 생산치를 위하여 1 ml ALA 생산계는 1.05 mg의 휴지균체로 6시간의 배양을 필요로 하였다. 또한, 이 조건에서 ALA 생산의 유도물질인 levulinate나 L-glutamate 등은 균체외 ALA 생산에 있어서 비교적 낮은 효과를 나타내었다. 반면에, ALA 생산계의 부피와 이에 적합한 균체밀도가 효과적인 ALA 생산을 위하여 중요한 요인으로 나타났다. 휴지균체의 안정한 ALA 생산유지를 위한 수명은 휴지균체를 고정화 시키므로써 크게 연장되었다. The effectiveness of the resting cells of a photosynthetic bacterium, Rhodocyclus gelatinosus KUP-74, was investigated on the production of extracellular ${\delta}-aminolevulinate$ (ALA). The ALA generating system with 1.05 mg cells per milliliter required 6 hr-incubation to obtain maximal yield of extracellular ALA. Under this condition ALA inducers, i.e., levulinate or L-glutamate showed relatively low effects to increase extracellular ALA production. Instead, the volume of the system and proper cell density appeared to be important factors for effective production of the ALA. The life-span of the resting cells was remarkably extended to maintain stable production of the ALA by immobilization of cells.
지게차 주행 환경에 따른 드라이브 엑슬 부품의 피로 및 가혹도 분석
유영준(Yeong Jun Yu),안영철(Young Chul An),이광희(Kwang-Hee Lee),박정현(Joeng Hyun Park),이대엽(Daeyup Lee),이철희(Chul-Hee Lee) 유공압건설기계학회 2023 드라이브·컨트롤 Vol.20 No.2
This study aimed to analyze the fatigue of forklifts in industrial settings by assessing their stress levels during operation. Strain gauges were affixed to the dynamic components of the forklifts to gather real-time data and enhance the reliability of the analysis. Although monitoring structural loads in harsh testing environments can be challenging, the affixed strain gauges on the dynamic components can provide more precise results and improve the interpretation of data. By creating testing modes that simulate forklift usage environments and performing experiments with selected cargo and driving modes, a comparison of the damage severity of forklift parts under different driving conditions was done. These results can be utilized to forecast the lifespan of forklift parts under extreme driving conditions and assist in the design and optimization of new parts in the future.
Rhodocyclus gelationous KUP - 74 의 휴지균체를 이용한 δ - Aminolevulinate 의 생산
이소희(So Hee Lee),안영철(Young Chul An),임왕진(Wang Jin Lim),황세영(Se Young Hwang) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.6
The effectiveness of the resting cells of a photosynthetic bacterium, Rhodocyclus gelatinosus KUP-74, was investigated on the production of extracellular δ-aminolevulinate (ALA). The ALA generating system with 1.05 ㎎ cells per milliliter required 6 hr-incubation to obtain maximal yield of extracellular ALA. Under this condition ALA inducers, i.e., levulinate or L-glutamate showed relatively low effects to increase extracellular ALA production. Instead, the volume of the system and proper cell density appeared to be important factors for effective production of the ALA. The life-span of the resting cells was remarkably extended to maintain stable production of the ALA by immobilization of cells.