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Pseudomonas sp. JH007에 의한 DL-2-Chloropropionic Acid로부터 D-Lactic Acid의 생산
정자헌,황인균,방원기 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.3
DL-2-chloropropionic acid로부터 D-lactic acid를 생산하기 위하여, 토양으로부터 DL-2-chloropropionic acid를 유일한 탄소원 및 에너지원으로 이용할 수 있는 균주 80여종을 분리하였으며, 분리균주들로부터 DL-2-chloropropionic acid로부터 D-lactic acid 생산성이 우수하며, L-lactic acid를 생산성이 우수하며, L-lactic acid를 생산하지 않은 균주 JH-007을 선별하여 Pseudomonas sp.로 동정하였다. DL-2-chloropropionic acid로부터 D-lactic acid를 생산하기 위한 최적 조건을 조사하기 위하여 3 g/l의 DL-2-chloropropionic acid가 포함된 LB 배지에서 배양하여 수확한 후 수확된 균체를 효소원으로 사용하였다. D-lactic acid 생산시 최적 반응액 조건은 125 mM sodium carbonate buffer에서 휴지균체 10 g/l와 3 g/l의 DL-2-chloropropionic acid를 사용할 때였으며, 최적 반응 pH는 10.0, 최적반응 온도는 30℃이었다. 최적조건하에서 반응액에 1 g/l의 DL-2-chloropropionic acid를 간헐적으로 첨가하여 5시간 반응시켰을 때 5.72 g/l의 D-lactic acid가 생산되었으며, 전환율은 98.4%였으며, 광학순도는 99.8%이었다. For the production of D-lactic acid from DL-2-chloropropionic acid, about 80 strains of bacteria capable of assimilating DL-2-chloropropionic acid as a sole carbon and energy source were isolated from the soil. JH-007 strain that showed the higest productivity of D-lactic acid and didn't produce L-lactic acid from DL-2-chloropropionic acid was selected from them and identified as Pseudomonas sp. The optimal conditions for the production of D-lactic acid from DL-2-chloropropionic acid were examined. The resting cells of JH-007 cultured in LB medium containing 3 g/l of DL-2-chloropropionic acid were used as an enzyme source. The reaction mixtures for the maximal production of D-lactic acid were consist of 10 g/l of resting cells and 3 g/l of DL-2-chloropropionic acid in 125 mM sodium carbonate buffer. The optimal pH for the reaction was 10.0 and the optimal temperature was 30℃. When 1 g/l of DL-2-chloropropionic acid was added intermittently to the reaction mixture under the above condition, 5.72 g/l of D-lactic acid was produced after incubation of 5 hrs. This amount of D-lactic acid corresponded to a 98.4% yields and the optical purity was 99.8%.
전신성 홍반성 루푸스 환자에서 다발성 간농양으로 발생된 Yersinia pseudotuberculosis 폐혈증
정자헌(Ja Hun Jung),김태환(Tae Hwan Kim),이인홍(In Hong Lee),양석철(Seok Chul Yang),전용철(Yong Cheol Jeon),김용수(Yong Soo Kim),김성윤(Seong Yoon Kim) 대한내과학회 1999 대한내과학회지 Vol.57 No.2
A 40-year-old man with systemic lupus erythematosus (SLE) and diabetes was found to have sepsis with multiple small hepatic abscesses secondary to Yersinia pseudotuberculosis which were detected by computed tomography (CT) scan and blood cultures. Sepsis with Y. pseudotuberculosis is uncommon but usually seen in patients with underlying liver diseases or diabetes. A few of those patients are accompanied by liver abscesses. Those patients with liver abscesses invariably have multiple small abscesses. CT scan of the liver was important in demonstrating the multiple small liver abscesses. Identification of the pathogen on blaod culture and elevated serum antibody titer to Y. pseudotu-berculosis are useful for diagnosis. Although rare, Y. pseudotuberculosis should be also considered as a possible cause in febrile patient with immunocompromised state such as SLE, diabetes or hemochromatosis.
전신성 홍반성 루푸스 양상으로 발현된 Human Adjuvant Disease
정자헌(Ja Hun Jung),정성수(Sung Soo Jung),문희식(Hee Sig Mun),송용호(Yong Ho Song),조영중(Young Jung Cho),오광택(Kwang Taek Oh),김태환(Tae Hwan Kim),전재범(Jae Bum Jun),이인홍(In Hong Lee),배상철(Sang Cheol Bae),유대현(Dae Hyun Yoo) 대한내과학회 1998 대한내과학회지 Vol.54 No.2
Human adjuvant disease means the autoimmune disease or autoimmune disease like syndrome developed after plastic surgery using foreign body implantation. After first report of l by Miyoshi at 1964, a number of cases have been reported especially from Japan. Silicone has been known as biologically inert material, but a couple of side reaction and experimental data argue against such conventional idea. It is impossible to identify the exact role of implanted substance in the occurrence of autoimmune disease, but there are a few indirect evidences for adjuvant effect of silicone. The spectrum of HAD are as follows: unclassifiable connective disease like syndrome, rheumatoid arthritis, SLE, polymyositis, adult Still's disease, ITP, Hashimoto's thyroiditis, ctc. We experienced two cases of HAD manifesting as SI.E who had been injected with silicone fluid with for augmentation mammoplasty and report this with a review of the literature.